https://cocake.com/videos/0-series-large-tool-case/ https://video.kexincases.com/media/posters/vid_20261031_1acb3753/p1.jpg 0 Series Large Tool Case: Capacity in Practice Open a large tool case on a bench and the first impression is generosity: sockets, a drill, a tape measure, all visible at once. Volume is the wrong number to buy on, and the figure printed on the carton rarely helps. What a case really hands over is the share of its outside envelope that survives walls, ribs, latch bosses and the lid joint, and that share is usually smaller than the box suggests. Work the ratio out, then test it against load density and the three-dimensional envelope of the bulkiest item you own. https://video.kexincases.com/media/derived/vid_20261031_1acb3753/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/zh/videos/0-series-large-tool-case/ https://video.kexincases.com/media/posters/vid_20261031_1acb3753/p1.jpg 0 系列大号工具箱：容量与承装逻辑 大号工具箱的视频里，箱盖一开，扳手、电钻、卷尺全在画面里，看上去很能装。真正决定好不好用的是另一组关系：装进去的东西占了多少可用容积，而不是箱子外形有多大。外形体积里有一截被壁厚、加强筋、锁扣座和盖口咬合吃掉了，剩下的才轮到工具。按装载密度和三维包络算一遍，比按升数挑箱子靠谱。 https://video.kexincases.com/media/derived/vid_20261031_1acb3753/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/videos/0-series-tool-case/ https://video.kexincases.com/media/posters/vid_20261031_f545d062/p1.jpg 0 Series Tool Case: Structure and Latch Shut a tool case and all anyone sees is a shell and two latches. What decides whether it lasts three years sits one layer down: how the wall feeds load into ribs, how much draft was left for ejection, how tight the lid meets the base, and where the latches pull that lid down. The clip walks that structure once, from pellet to moulded shell to the closing sequence. What follows are the numbers behind each step, so a sample on the bench can be checked against them, one at a time. https://video.kexincases.com/media/derived/vid_20261031_f545d062/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/zh/videos/0-series-tool-case/ https://video.kexincases.com/media/posters/vid_20261031_f545d062/p1.jpg 0 系列工具箱：结构与开合方式 一只工具箱关上之后，能看见的只有外形和两只锁扣。真正决定它能不能撑三年的是看不见的那一层：箱壁怎么把力送进加强筋，脱模斜度留了多少，盖与底的合缝控制到几丝，锁扣在哪个位置把盖子拉下来。片子把结构走了一遍，这一页把每一步背后的判断依据和数值写下来，方便对照实物看。 https://video.kexincases.com/media/derived/vid_20261031_f545d062/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/videos/0-series-tool-case-colours/ https://video.kexincases.com/media/posters/vid_20261031_d216869d/p1.jpg 0 Series Tool Case: Available Colours Line up five or six colourways of one case under the same light and the difference is not only cosmetic. Colour works as a management device on this class of product: which colour belongs to which product line, which batch of compound, which customer, all readable at a glance and harder to lose than a paper label. The cost lands in moulding: let-down ratio, purge time, batch variation and heat build-up in dark shades. All four are cheaper to settle before the tool is cut, and none of them shows in a photograph. https://video.kexincases.com/media/derived/vid_20261031_d216869d/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/zh/videos/0-series-tool-case-colours/ https://video.kexincases.com/media/posters/vid_20261031_d216869d/p1.jpg 0 系列工具箱：可选的箱体配色 同一款箱子摆开五六个颜色，在同一个光位下拍，差别不只是好不好看。颜色在这一档产品里是管理工具：哪个色对应哪条产品线、哪批料、哪个客户，靠它一眼分清，比贴标签牢靠。代价落在注塑环节——色母比例、清机时间、批次色差、深色吸热，每一项都要在开模之前算进成本。 https://video.kexincases.com/media/derived/vid_20261031_d216869d/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/videos/3917-protective-case/ https://video.kexincases.com/media/posters/vid_20261031_5e4bad61/p1.jpg 3917 Protective Case: Model Footage A 53 s vertical clip can spare a buyer one round of sample shipping, or plant an assumption that survives all the way into the purchase order. What follows is a reading method rather than a description: how the 9:16 frame crops the case, which measurements a hand or a latch can stand in for, where the visible detail runs out, and which three questions only a physical unit can settle. The goal is narrow: leave the clip with numbers you can defend in a meeting, and a short list of what still needs a bench. https://video.kexincases.com/media/derived/vid_20261031_5e4bad61/720p.mp4 53 2026-11-04T08:43:44Z https://cocake.com/zh/videos/3917-protective-case/ https://video.kexincases.com/media/posters/vid_20261031_5e4bad61/p1.jpg 3917 防护箱：型号实拍 53 秒的竖屏片可以替采购方省掉一次样箱往返，也可能留下一个一直带到订单里的误判。这一段实拍把箱体外观与内部空间压进 9:16 的画幅，横向信息被压到实际宽度的 0.75 倍，上下各裁掉约四分之一。读片的方法决定了你究竟能拿走多少：提手、锁扣和手本身就是现成的比例尺，前提是知道该量哪一段、误差有多大、哪些结论必须等样品到手才能下。 https://video.kexincases.com/media/derived/vid_20261031_5e4bad61/720p.mp4 53 2026-11-04T08:43:44Z https://cocake.com/videos/801c-protective-case/ https://video.kexincases.com/media/posters/vid_20261031_f565824b/p1.jpg 801C Protective Case: Outside and Inside Mid-size cases attract the most questions and the vaguest answers. Eighteen seconds of footage shows three concrete areas: the lid, the sealing rim, and a cavity sized for foam. Together they explain the appeal of the middle size — capacity pushed right up to the edge of what one person can carry — and its price, which is paid in millimetres stolen from the interior. This piece walks those three areas, marks where the trade-off tips toward a larger or a smaller size, and names the numbers worth putting on a specification sheet. https://video.kexincases.com/media/derived/vid_20261031_f565824b/720p.mp4 19 2026-11-04T08:43:44Z https://cocake.com/zh/videos/801c-protective-case/ https://video.kexincases.com/media/posters/vid_20261031_f565824b/p1.jpg 801C 防护箱：外观与内部结构 中号箱被问得最多，也最容易被写成一堆形容词。18 秒的素材给的是三个具体部位：箱盖、密封边缘、可放泡棉的内腔。它们合起来说明一件事——中等尺寸之所以好用，是因为它把容量压在单个人还提得动的上沿，代价是每一毫米内腔都要从别处挪出来。这篇按这三个部位拆开算账，给出取舍点落在哪、什么时候该换更大或更小的一档。 https://video.kexincases.com/media/derived/vid_20261031_f565824b/720p.mp4 19 2026-11-04T08:43:44Z https://cocake.com/videos/810a-c-protective-case/ https://video.kexincases.com/media/posters/vid_20261031_6dfca54f/p1.jpg 810A-C Protective Case: Shell and Latches With a large case, the trouble is rarely whether it holds enough — it is where the force goes. Seventeen seconds of footage covers moulding, latches and handle, which map onto three load paths: closing force pressing the lid onto the seal, handle force entering the wall, and the wall spreading that force across its section. Whichever link gives first defines the weak point. This piece follows each path and states the number that controls it. None of it needs a certification mark; a straightedge, a feeler gauge and two people lifting will do. https://video.kexincases.com/media/derived/vid_20261031_6dfca54f/720p.mp4 17 2026-11-04T08:43:44Z https://cocake.com/zh/videos/810a-c-protective-case/ https://video.kexincases.com/media/posters/vid_20261031_6dfca54f/p1.jpg 810A-C 防护箱：箱体与锁扣细节 中大型箱的问题很少出在“能不能装”，多半出在“力往哪走”。17 秒的素材拍的是箱体成型、锁扣与提手三处，正好对应三条传力路径：扣合力把箱盖压向密封面，提手把重量送进箱壁，箱壁再把力摊到整个截面。哪一段先撑不住，箱子的短板就在哪。这篇按这三条路径拆开，给出每一段的控制量与现场可测的判据。 https://video.kexincases.com/media/derived/vid_20261031_6dfca54f/720p.mp4 17 2026-11-04T08:43:44Z https://cocake.com/videos/8442-protective-case/ https://video.kexincases.com/media/posters/vid_20261031_4f4db8b2/p1.jpg 8442 Protective Case: Large Capacity Shell A lid this size stops behaving like a plate and starts behaving like a sheet stretched between whatever holds it. Double the span and the sag does not double, it multiplies by sixteen, which is why a case that feels rigid on the bench can dish in the middle once a machine is loaded and a second case goes on top. Extra wall thickness buys surprisingly little against that. The footage runs eighteen seconds and shows the shell from the outside; what follows is where the load actually travels inside it, and how a weak layout gets caught at the bench. https://video.kexincases.com/media/derived/vid_20261031_4f4db8b2/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/zh/videos/8442-protective-case/ https://video.kexincases.com/media/posters/vid_20261031_4f4db8b2/p1.jpg 8442 防护箱：大容量箱体展示 8442 这一档的箱盖接近一整块平板。边长一大，刚度就不再由壁厚决定，而由支撑点之间的距离决定：平板受均布载荷时，中心挠度与跨距的四次方成正比，跨距翻倍，挠度涨十六倍。补厚只能线性改善，挪支撑位置却能按四次方改善。下面五段都在算同一笔账——怎样把载荷从大平面的中央，尽快引到加强筋和锁扣柱上。 https://video.kexincases.com/media/derived/vid_20261031_4f4db8b2/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/videos/865-trolley-protective-case/ https://video.kexincases.com/media/posters/vid_20261031_267d3b33/p1.jpg 865 Trolley Case: Moving a Loaded Case An empty case rolls well and tells you nothing about itself. Fill it with instruments and the same handle and the same wheels suddenly feel wrong, because the load raised the centre of gravity and every degree of tilt now costs the wrist more than it did before. Thirteen seconds of footage covers three moves in sequence: handle out, pull, kerb. Each answers a separate question. The two costs the camera never shows are how much interior volume the mechanism consumes and how trip frequency converts into wheel life. https://video.kexincases.com/media/derived/vid_20261031_267d3b33/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/zh/videos/865-trolley-protective-case/ https://video.kexincases.com/media/posters/vid_20261031_267d3b33/p1.jpg 865 拉杆防护箱：移动方式演示 空箱拖着走，谁都不会觉得有问题；装满之后，同一套拉杆和轮子会突然变得难用。差别不在拉杆，在重心——装载把重心抬高了，手腕要付的力矩随倾角放大。片子里拉杆伸出、拖行、过坎三个动作连在一起，正好对应三笔不同的账：倾角决定手腕载荷，坎高决定瞬时冲击，节数决定晃动量，剩下的两笔是容积和寿命。 https://video.kexincases.com/media/derived/vid_20261031_267d3b33/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/videos/a7-14616-case/ https://video.kexincases.com/media/posters/vid_20261031_a3b74eb7/p1.jpg A7-14616 Protective Case: Model Overview Cross a certain span and a case lid stops being about closing and starts being about sealing evenly. Stretch the span, keep the same wall and the same latch pull, and the middle lifts first: the gasket there never reaches full compression, and water takes the shortest path along the seam. Three problems arrive at once — the lid must not sag, it must stay where it is put once raised, and it must press the whole perimeter with equal force. Fix one and the other two usually pay for it. https://video.kexincases.com/media/derived/vid_20261031_a3b74eb7/720p.mp4 57 2026-11-04T08:43:44Z https://cocake.com/zh/videos/a7-14616-case/ https://video.kexincases.com/media/posters/vid_20261031_a3b74eb7/p1.jpg A7-14616 防护箱：型号展示 箱盖宽度一过临界点，问题就从“关得住”变成“压得匀”。跨距拉长，同样的壁厚、同样的扣合力，跨中先鼓起来，密封条在那里压不到底，水顺着盖缝进来的速度比想象中快。长跨箱盖要同时解决三件事：盖自己别塌、开盖后别自己掉下来、合盖时整条周长压力一致。这三件互相牵制，动一件常要退另一件。 https://video.kexincases.com/media/derived/vid_20261031_a3b74eb7/720p.mp4 57 2026-11-04T08:43:44Z https://cocake.com/videos/a7-2812-case/ https://video.kexincases.com/media/posters/vid_20261031_bf147b6b/p1.jpg A7-2812 Protective Case: Full Walkaround Sixty-one seconds, one unbroken take, no cut. The format hands the editing to footwork: the camera cannot hold still for long and cannot jump away, so it walks a lap and arrives where it should look at the moment it should look. That splits the film into three blocks of uneven density — shape at the front, mechanism in the middle, cavity at the end — and the information thickens as it goes. Whatever it shows in that minute, three things still need a sample and a bench test. https://video.kexincases.com/media/derived/vid_20261031_bf147b6b/720p.mp4 61 2026-11-04T08:43:44Z https://cocake.com/zh/videos/a7-2812-case/ https://video.kexincases.com/media/posters/vid_20261031_bf147b6b/p1.jpg A7-2812 防护箱：整箱展示 六十一秒，一条镜头到底，中间没有剪辑点。这种拍法把编辑的工作交给了走位：机位不能停太久，也不能切走，只能绕着箱子走一圈，该看的地方正好转到画面里。于是节奏被时间切成三段，密度并不均匀。前段看外形，中段看开合，后段看内腔，越往后信息越密。而无论拍得多细，总有三件事只能等样。 https://video.kexincases.com/media/derived/vid_20261031_bf147b6b/720p.mp4 61 2026-11-04T08:43:44Z https://cocake.com/videos/a7-3015-case/ https://video.kexincases.com/media/posters/vid_20261031_310e869f/p1.jpg A7-3015 Protective Case: Model Overview Most buyers count latches and stop there. Two or four looks like a trim difference; in practice it is a difference in how force travels. Latches never share load equally. The first one closed takes most of the preload and the rest only top it up. The same logic decides how the case is opened, how two people share the lift, and which of four similar models actually fits — none of it visible in a latch count. Get the order wrong and nothing breaks that day. The gasket is over-compressed in one spot, slowly loses its rebound, and a year later the case weeps with no obvious cause. https://video.kexincases.com/media/derived/vid_20261031_310e869f/720p.mp4 46 2026-11-04T08:43:44Z https://cocake.com/zh/videos/a7-3015-case/ https://video.kexincases.com/media/posters/vid_20261031_310e869f/p1.jpg A7-3015 防护箱：型号展示 锁扣这件事，多数人只数个数。两个还是四个，看起来是配置差异，实际是受力路径的差异。多锁扣从来不是同时受力：先扣的那个吃掉了大部分预紧，后扣的只补剩下的。盖怎么开、两个人怎么分担，也由它决定。顺序错了不会当天就坏，胶条被局部压过头，回弹一点点丢失，一年之后开始渗水，而那时已经很难找到原因。 https://video.kexincases.com/media/derived/vid_20261031_310e869f/720p.mp4 46 2026-11-04T08:43:44Z https://cocake.com/videos/a7-3514-case/ https://video.kexincases.com/media/posters/vid_20261031_e430c9e1/p1.jpg A7-3514 Protective Case: Model Footage Between watching a clip and committing to a production order sits one working day: the first 48 hours after a sample reaches your bench. Buyers tend to sign off as soon as the shell looks clean and the lid closes. The faults that later turn into a rework sheet are smaller — a 0.5 mm joint gap, a hinge screw torqued to 1.2 N·m instead of 1.5, a foam block that took a set overnight and never came back. What follows is the order to check in, twelve items, two AQL levels, and which verdict each miss earns. https://video.kexincases.com/media/derived/vid_20261031_e430c9e1/720p.mp4 53 2026-11-04T08:43:44Z https://cocake.com/zh/videos/a7-3514-case/ https://video.kexincases.com/media/posters/vid_20261031_e430c9e1/p1.jpg A7-3514 防护箱：型号实拍 看完片子到决定要不要留样，中间还差一道关：样箱到手后的 48 小时怎么验。这一步最容易被草率对待——外观没磕碰、盖子能合上，就签字了。真正会在批量里变成返工单的，往往是合缝那 0.5 mm、铰链上一颗只有 1.2 N·m 的螺钉、以及泡棉压了一晚没回弹的那一块。下面是一份可以直接照着走的验收顺序：12 项，两档 AQL，每一项不合格时该走哪条路。 https://video.kexincases.com/media/derived/vid_20261031_e430c9e1/720p.mp4 53 2026-11-04T08:43:44Z https://cocake.com/videos/a7l-5726-case/ https://video.kexincases.com/media/posters/vid_20261031_8105b20e/p1.jpg A7L-5726 Case: The Long-Body Version Stretching a standard case is not how a long-body shell works. Once the span passes 600 mm the wall stops behaving as a plate and starts behaving as a beam: with nothing under the middle, its own mass plus road vibration walks the lid downward and the long item bends with it. The clip shows length and an uninterrupted interior. It cannot show how the L/300 deflection line lands on a given span, where the supports belong, why a rib is 8 mm and not 15, or how much clearance a long item needs at each end. https://video.kexincases.com/media/derived/vid_20261031_8105b20e/720p.mp4 59 2026-11-04T08:43:44Z https://cocake.com/zh/videos/a7l-5726-case/ https://video.kexincases.com/media/posters/vid_20261031_8105b20e/p1.jpg A7L-5726 防护箱：长箱体结构 长箱体不是把标准箱按比例拉长。跨距一过 600 mm，壳体就从「板」变成「梁」，受力方式整个换掉：中间没有支撑，自重加上运输振动，盖面会往下走，长件跟着一起弯。片子里看到的是长度与内腔的连续；看不到的是 L/300 这条挠度线怎么落到具体跨距上、支撑该放在第几段、加强筋为什么取 8 mm 而不是 15 mm，中段那道环形筋又管不管用。 https://video.kexincases.com/media/derived/vid_20261031_8105b20e/720p.mp4 59 2026-11-04T08:43:44Z https://cocake.com/videos/camera-storage-case/ https://video.kexincases.com/media/posters/vid_20261031_e4fe046c/p1.jpg Camera Storage Case: Bodies, Lenses and Accessories A camera case is not divided by what the gear weighs or how big each item happens to be. It is divided by the order in which a shoot actually happens: body out, lens on, plate checked, spare card where the hand expects it. Sort the compartments by size instead and the case looks tidy in the studio while failing on location, where a single lens change means opening three pockets and shifting two bodies aside. The footage shows the pockets from above. What follows covers compartment count, the route a hand takes, odd-shaped hardware, and the price of density. https://video.kexincases.com/media/derived/vid_20261031_e4fe046c/720p.mp4 19 2026-11-04T08:43:44Z https://cocake.com/zh/videos/camera-storage-case/ https://video.kexincases.com/media/posters/vid_20261031_e4fe046c/p1.jpg 相机收纳防护箱：机身与镜头的分区 分区不是把箱子切成格子，是把拍摄现场的动作顺序切成格子。按器材大小排，箱子好看，现场却难用：换一次镜头要开三个格子、挪两件东西、再合上盖。按流程排，机身一格、常用镜头两格、备件一格，手伸进去就能摸到下一步要用的东西。下面五段讲分区数量、动作路径、异形件占位和密度代价这四件事怎么互相牵制，以及两人共用一箱时怎么约定。 https://video.kexincases.com/media/derived/vid_20261031_e4fe046c/720p.mp4 19 2026-11-04T08:43:44Z https://cocake.com/videos/camouflage-protective-case/ https://video.kexincases.com/media/posters/vid_20261031_5bdd7a8d/p1.jpg Camouflage Case: Surface Finish and Pattern How does a camouflage pattern get onto a case shell? There are three routes and three very different bills. Hydrographics wraps compound curves but wears at the edges; stencil spraying suits small runs while leaving every boundary to a pair of hands; in-mould colouring outlasts both and locks the pattern to the tooling. Eighteen seconds of daylight footage shows how the pattern sits on the shell. It cannot show a 25 μm film, a 1 mm registration drift, where colour goes after 500 h of UV, or how much sanding a repair allows. https://video.kexincases.com/media/derived/vid_20261031_5bdd7a8d/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/zh/videos/camouflage-protective-case/ https://video.kexincases.com/media/posters/vid_20261031_5bdd7a8d/p1.jpg 迷彩防护箱：表面处理与外观 迷彩图案是怎么跑到箱壳上去的？答案有三种，代价完全不同：水转印适合复杂曲面但怕磨，喷涂遮蔽适合小批量但边界靠手，模内着色最耐久却受模具限制。18 秒的片子只拍得到日光下的花纹分布，拍不到那 25 μm 的干膜、1 mm 的套准偏差，也拍不到紫外 500 h 之后 ΔE 会走多远，以及返修时那 0.2 mm 的打磨余量。图案好看是结果，工艺窗口才是原因。 https://video.kexincases.com/media/derived/vid_20261031_5bdd7a8d/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/videos/case-styles/ https://video.kexincases.com/media/posters/vid_20261031_e56a3d93/p1.jpg A Range of Case Styles One shell, four variables. Lid depth, latch count, handle construction and wheel set are what actually separate one case from the next, and each one pulls on internal height, gasket compression, load path and rolling posture. Comparing the four separately gets a buyer to an inspectable specification far faster than comparing photographs. https://video.kexincases.com/media/derived/vid_20261031_e56a3d93/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/zh/videos/case-styles/ https://video.kexincases.com/media/posters/vid_20261031_e56a3d93/p1.jpg 不同款式箱子展示 同一副外形轮廓，盖深换一档就是另一种取放姿势，多一对锁扣就是另一档开合手感。款式差异不在造型，在盖深、锁扣数量、把手形式和轮组这四组结构变量上，它们各自牵着内部净高、密封压缩量、承重路径与推行姿态。采购时把四组变量拆开对照，比对着照片挑颜色更快落到能验收的条款上。 https://video.kexincases.com/media/derived/vid_20261031_e56a3d93/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/videos/custom-colours/ https://video.kexincases.com/media/posters/vid_20261031_2b96af8a/p1.jpg Custom Colours for Every Brand Colour is not sprayed on, it is compounded into the powder and sintered into the wall. A case that comes in a dozen shades is not hard because of matching; it is hard because of cleanout between runs, batch-to-batch drift, and the thermal bill that comes with dark shells. The question is not whether the colour exists, but whether batch three still matches batch one. https://video.kexincases.com/media/derived/vid_20261031_2b96af8a/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/zh/videos/custom-colours/ https://video.kexincases.com/media/posters/vid_20261031_2b96af8a/p1.jpg 不同颜色随你定制 颜色不是喷在表面的，是拌进料里、跟着熔结长进箱壁的。一只能做十几种颜色的箱子，真正的门槛不在调色，在换色清机、批次色差和深色件的热账上。清机不彻底，浅色件上会浮出深色斑点；色差没有判据，第三批和第一批就是两个颜色；深色吸热，箱内温度跟着抬一截。采购要问的，是这三件事各自怎么验。 https://video.kexincases.com/media/derived/vid_20261031_2b96af8a/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/videos/game-console-case/ https://video.kexincases.com/media/posters/vid_20261031_dafdc105/p1.jpg Game Console Case: Console, Controllers and Cables The clip is short: lid up, controller out, console lifted, cable pulled, lid down. Four moves, three bays, thirteen seconds. What the footage cannot tell you is why the bays sit in that order, how much clearance each slot gives away, or what keeps a coiled power lead from migrating into the console bay between trips. Those three decisions set how fast the case opens, and whether the console is still seated when you arrive. None of it shows on camera; all of it shows up the tenth time you pack the case. https://video.kexincases.com/media/derived/vid_20261031_dafdc105/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/zh/videos/game-console-case/ https://video.kexincases.com/media/posters/vid_20261031_dafdc105/p1.jpg 游戏机防护箱：主机与配件的收纳 十几秒的片子里，开箱、抓柄、抱主机、抽线一气呵成，看上去只是把三样东西放进三个格子。真正决定这套动作顺不顺的，是仓位的前后顺序、每个槽多留的那几毫米，以及线材会不会在运输途中自己跑出来。顺序错了，每次开机要多花二十秒；余量错了，主机要么塞不进去，要么在箱里晃。这套顺序不是审美问题，是取用次数算出来的。 https://video.kexincases.com/media/derived/vid_20261031_dafdc105/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/videos/medical-device-case/ https://video.kexincases.com/media/posters/vid_20261031_b595dbf7/p1.jpg Medical Device Case: Transport and Access Four moves define this case: off the vehicle, onto the floor, up onto a bench, lid open. The clip removes the waiting and the handovers, so it reads as one smooth motion by one person. What it hides is whether the lid stays where you put it, how much bench the open case consumes, and how many seconds the straps cost before the device is in hand. Those three decide whether the run can be done alone. Miss any one of them and the whole run becomes a two-person job. https://video.kexincases.com/media/derived/vid_20261031_b595dbf7/720p.mp4 25 2026-11-04T08:43:44Z https://cocake.com/zh/videos/medical-device-case/ https://video.kexincases.com/media/posters/vid_20261031_b595dbf7/p1.jpg 医疗器械防护箱：运输与取用场景 这台箱子从车上搬下来、放到地面、抬上台面、掀盖取设备，四段动作里没有一段可以省。片子剪掉了中间的等待和换手，看上去像一个人顺手就完成了。真实场景里，盖子会不会自己倒回来、箱子放在台面上占多少地方、绑带解开要几秒，才决定一个人能不能独立做完这套动作。先算动线，再谈箱体。 https://video.kexincases.com/media/derived/vid_20261031_b595dbf7/720p.mp4 25 2026-11-04T08:43:44Z https://cocake.com/videos/rifle-case/ https://video.kexincases.com/media/posters/vid_20261031_3b24b0d3/p1.jpg Rifle Case: Fixing Long Items The hard part of packing something long is not getting it in, it is keeping it still once the lid is shut. End clearance, support spacing and lid interference decide whether the item is in the same place after five hundred kilometres. The clip shows the press-down; the numbers below are what has to reach the drawing. https://video.kexincases.com/media/derived/vid_20261031_3b24b0d3/720p.mp4 26 2026-11-04T08:43:44Z https://cocake.com/zh/videos/rifle-case/ https://video.kexincases.com/media/posters/vid_20261031_3b24b0d3/p1.jpg 枪箱展示：长物件的固定方式 长物件装箱的难点不在装得进去，在于装进去之后会不会动。两端留多少余量、中部隔多远加一道支撑、盖内衬垫压下去几毫米，这三件事决定了运输几百公里之后，物件还在不在原来的位置上。腔壁面积不够，泡棉会被剪坏；过盈差一毫米，盖子扣上也是个空壳。片子只拍了几十秒的压合动作，真正要落进图纸和验收条款的，是下面这些能测能算的量。 https://video.kexincases.com/media/derived/vid_20261031_3b24b0d3/720p.mp4 26 2026-11-04T08:43:44Z https://cocake.com/videos/trading-card-storage-case/ https://video.kexincases.com/media/posters/vid_20261031_7c0afb0a/p1.jpg Trading Card Case: Compartments and Compression Card cases are not judged on looks. They are judged on whether each compartment is a millimetre too wide or too narrow, and on which edge the lid presses when it closes. The clip shows the lid coming down; it cannot show how thick a hundred cards really are, what half a millimetre of lean does to a divider, or how much compression turns storage into bowing. A square, a feeler gauge and a hygrometer settle all three, and none of these three numbers is a guess; each comes off a test. https://video.kexincases.com/media/derived/vid_20261031_7c0afb0a/720p.mp4 28 2026-11-04T08:43:44Z https://cocake.com/zh/videos/trading-card-storage-case/ https://video.kexincases.com/media/posters/vid_20261031_7c0afb0a/p1.jpg 卡牌收纳防护箱：分格与防压 一箱卡牌的好坏不在外观，而在每个格子宽了还是窄了、盖子合上时压住的是哪一圈。片子只拍合盖那一下，看不到 100 张卡摞起来到底多厚、隔板偏了半毫米会怎样、压得太紧会不会把卡压出弯。这一页把这几笔账算清楚，也给几个能当场做的检验方法，工具只要一把直角尺、一把塞尺和一支湿度计。 https://video.kexincases.com/media/derived/vid_20261031_7c0afb0a/720p.mp4 28 2026-11-04T08:43:44Z https://cocake.com/videos/trolley-case/ https://video.kexincases.com/media/posters/vid_20261031_a50a9974/p1.jpg Trolley Case: Wheels and Handle Together A case loaded to thirty kilos tells you whether it rolls well within two metres, and the answer comes from wheel diameter, track width, handle stages and play, not from the outline. One size down on wheels and a threshold stops it; twenty millimetres narrower and it needs a hand at the lift door. These numbers rarely survive a fifteen-second clip. https://video.kexincases.com/media/derived/vid_20261031_a50a9974/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/zh/videos/trolley-case/ https://video.kexincases.com/media/posters/vid_20261031_a50a9974/p1.jpg 拉杆防护箱：轮子与拉杆的配合 一只装到三十公斤的箱子，推起来顺不顺手，跟外形关系不大，跟轮径、轮距、拉杆节数和晃动量直接相关。轮子小一号，门槛就过不去；轮距窄两厘米，电梯口就得扶一把；拉杆多一节，握把端前后能晃两厘米。这些差别在十几秒的片子里看得见动作，看不见数值，而数值才决定箱子在坡道上会不会自己跑。 https://video.kexincases.com/media/derived/vid_20261031_a50a9974/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/videos/watch-case/ https://video.kexincases.com/media/posters/vid_20261031_5a651ac7/p1.jpg Watch Case: Holding One Watch Properly A watch in a box is held by three contacts at once: the cushion spreads the strap, the lid liner stops the crystal, and the base pad carries the slack hanging below. Loosen any one of them and the watch shifts in transit, whether the box rides in a drawer or a carry-on, with the buckle usually the first part to reach the caseback. This is display packaging rather than a protective shell, so the numbers that matter are compression, clearance and the gap at the parting line, not wall thickness and latch count. https://video.kexincases.com/media/derived/vid_20261031_5a651ac7/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/zh/videos/watch-case/ https://video.kexincases.com/media/posters/vid_20261031_5a651ac7/p1.jpg 手表收纳盒：单表固定与取放 一只表在盒子里被三处同时管住：表枕撑住表带，盖内壁挡住表镜，底衬接住表带下垂的重量。三点里任何一处留了余量，搬运时表就会在里面滑，表带扣最先刮到表背。礼盒档的结构不是为了抗跌落，而是要在合盖那一刻把位置锁死，所以这一档真正量的是表枕压缩量、镜面余量和盖底合缝，不是壁厚和锁扣数。 https://video.kexincases.com/media/derived/vid_20261031_5a651ac7/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/videos/assembly-and-warehouse/ https://video.kexincases.com/media/posters/vid_20261031_084262b6/p1.jpg Assembly and Warehouse: Before Dispatch A warehouse turns floor space into time. Between the end of the line and a shut container door, a case passes four accounts: location, stack, rotation and load plan. Each carries a number — square metres taken, layers stacked, days on the shelf, cubic metres paid for and left empty. Get them wrong and freight idles on the dock, or shifts at sea and lands bruised. The figures below are typical ranges from ordinary dispatch weeks, not guarantees, and none of them depend on how many people stand at the assembly benches. https://video.kexincases.com/media/derived/vid_20261031_084262b6/720p.mp4 24 2026-11-04T08:43:44Z https://cocake.com/zh/videos/assembly-and-warehouse/ https://video.kexincases.com/media/posters/vid_20261031_084262b6/p1.jpg 组装与仓储：出货前的一道 库房不是堆货的地方，是把空间换成时间的地方。一只箱子从下线到柜门关上，要过四道账：库位、堆码、周转、装柜。每一道都能落成数字——占多少平方米、压几层、放几天、柜里空掉多少立方。这几笔账算不清，货就会在月台上等，或者在海上晃。本篇只算物流这一侧的进出，不碰组装线上的人手与工时，数值一律按区间给，不给保证值。 https://video.kexincases.com/media/derived/vid_20261031_084262b6/720p.mp4 24 2026-11-04T08:43:44Z https://cocake.com/videos/case-changeover/ https://video.kexincases.com/media/posters/vid_20261031_2782946f/p1.jpg Case Changeover: How Long a Swap Takes The clip runs twelve seconds. A real changeover runs 90 to 180 minutes, because the edit removes the unglamorous parts: unbolting the tool, plumbing the water, waiting for the mould to reach temperature, and waiting for a first article to stop shrinking. Bolts are not the bottleneck. Thermal stability is, and it is the cheapest thing to fix. https://video.kexincases.com/media/derived/vid_20261031_2782946f/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/zh/videos/case-changeover/ https://video.kexincases.com/media/posters/vid_20261031_2782946f/p1.jpg 箱子切换：换型要多久 视频只有 12 秒，现场一次完整换型要 90 min 到 180 min。差别在于片子剪掉了拆模、接水路、等模温、对首件这几段。真正占时间的不是拧螺栓，而是「等设备回到稳定状态」：模温从 25℃ 爬到 80℃ 要 25 min 到 40 min，PA66 料要烘 4 h，首件要等冷却到室温才量得准。把这四段拆开看，才知道哪一段值得花钱改。换型快不快，看的不是手速，是设备能不能提前进入稳态。 https://video.kexincases.com/media/derived/vid_20261031_2782946f/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/videos/case-forming/ https://video.kexincases.com/media/posters/vid_20261031_5ffb56b9/p1.jpg Watch a Case Take Shape The shell in the clip goes from flat sheet to standing box in under half a minute. What decides whether it survives is off camera: moisture in the sheet before it enters the oven, the temperature gap between its two faces, and how much material the corners lose. Miss any one of those and the case still looks fine on the line — then cracks open at a corner fold after two truck runs and a freezing night on an airport apron. https://video.kexincases.com/media/derived/vid_20261031_5ffb56b9/720p.mp4 28 2026-11-04T08:43:44Z https://cocake.com/zh/videos/case-forming/ https://video.kexincases.com/media/posters/vid_20261031_5ffb56b9/p1.jpg 看这个防护箱一步步成型 视频里那只箱子，从一张平板到立起来的箱体只用了不到半分钟。真正决定它能不能用得住的，是画面外的三件事：板材进炉前的含水率、加热时上下表面的温差、折角处被拉薄了多少。这三个数只要有一个跑偏，箱体当场看不出来，装车运两趟、在零下十几度的机场停一夜，裂纹就从折角外侧开始走。成型不是「加热—压下—取出」，而是一串互相牵制的窗口。 https://video.kexincases.com/media/derived/vid_20261031_5ffb56b9/720p.mp4 28 2026-11-04T08:43:44Z https://cocake.com/videos/case-pins/ https://video.kexincases.com/media/posters/vid_20261031_6b0744d5/p1.jpg The Small Pins That Hold a Case Together A case carries fewer than ten pins, 4 mm to 8 mm across, and they account for under 2% of its cost. They also decide how many times the hinge opens and whether a latch stays shut in a drop. Pins rarely break first. They wear, then loosen, then ovalise the bore, and only then snap — which is why material, fit and press depth settle the service life before anything else. https://video.kexincases.com/media/derived/vid_20261031_6b0744d5/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/zh/videos/case-pins/ https://video.kexincases.com/media/posters/vid_20261031_6b0744d5/p1.jpg 防护箱上这几个小销子，竟然这么重要 一只箱子上的销子不到十根，直径 4 mm 到 8 mm，成本占比不到 2%，却决定了铰链能开合多少次、锁扣在跌落时会不会弹开。销子失效很少一上来就断，多数是先磨、再松、孔被磨成椭圆，最后才断。把材质、配合、压装深度三件事定下来，寿命基本就定了；真正断在孔里的那根，反而是最容易处理的。麻烦的是它失效时不报警，等你发现，孔已经磨成椭圆。 https://video.kexincases.com/media/derived/vid_20261031_6b0744d5/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/videos/factory-capability/ https://video.kexincases.com/media/posters/vid_20261031_7aedd5ed/p1.jpg Factory Capability: Equipment and Lines An equipment list records what a plant owns. It says nothing about what leaves the dock each month. Output is five numbers multiplied together: machines, cavities, cycle time, OEE, paid hours. A quote missing any one of them is a guess dressed as a figure. What follows is the arithmetic used to schedule real orders, with the losses left in instead of netted out: changeover, trial runs, tool repair, waiting on material. Every figure is a working range taken from ordinary production weeks, not a guaranteed ceiling. Read it as a way to question a quote, not to accept one. https://video.kexincases.com/media/derived/vid_20261031_7aedd5ed/720p.mp4 48 2026-11-04T08:43:44Z https://cocake.com/zh/videos/factory-capability/ https://video.kexincases.com/media/posters/vid_20261031_7aedd5ed/p1.jpg 工厂实力概览：从设备到产线 设备清单只写了工厂有什么，没写每月能出多少。把台数、腔数、节拍、OEE 和班次代进同一条算式，才换得出一个月产能区间；五项里空一项，报出来的数字就只是形容词。下面做的只有一件事：把车间里数得出来的东西，折成每月出多少只箱子，以及这个数在什么条件下会掉三成。所有取值都是典型区间，不是承诺值。 https://video.kexincases.com/media/derived/vid_20261031_7aedd5ed/720p.mp4 48 2026-11-04T08:43:44Z https://cocake.com/videos/factory-from-the-air/ https://video.kexincases.com/media/posters/vid_20261031_dca6b19c/p1.jpg The Factory From Above: Site and Line Layout From the air you see less of the plant and more of the plan. Road geometry, dock orientation, the gap between two halls, the empty lot on one side — all of it fixed on a site drawing long before the first machine arrives. Those lines decide how often a trailer has to reverse, whether inbound and outbound fight over a single gate, and whether a second building is still possible ten years out. A drone pass takes forty seconds; the decisions underneath it hold for a decade. What follows reads the layout rather than touring the floor. https://video.kexincases.com/media/derived/vid_20261031_dca6b19c/720p.mp4 35 2026-11-04T08:43:44Z https://cocake.com/zh/videos/factory-from-the-air/ https://video.kexincases.com/media/posters/vid_20261031_dca6b19c/p1.jpg 工厂航拍视角：厂区与产线布局 从空中看到的东西比车间少，却比车间诚实：路怎么绕、月台朝哪边、两栋楼之间留了多宽、空地在哪一侧。这些在总平面图上就定死的东西，决定货车在厂内要倒几把、原料与成品会不会在同一个门口打架、十年后还能不能加一栋楼。片子只有几十秒，规划上的取舍却要用很多年，厂区规划是一次性决定里最贵的那个。 https://video.kexincases.com/media/derived/vid_20261031_dca6b19c/720p.mp4 35 2026-11-04T08:43:44Z https://cocake.com/videos/factory-tour/ https://video.kexincases.com/media/posters/vid_20261031_4d916bad/p1.jpg Factory Tour: 18,000 m² of Case Making A walk-through video runs the risk of becoming a corridor tour. Four things are worth counting instead: press tonnage and machine count, whether the tool room can repair its own moulds, whether foam cutting sits behind its own dust wall, and what the lab can actually test. Those four set the ceiling on capacity and the floor on quality — and they decide whether a lead time is calculated or improvised. https://video.kexincases.com/media/derived/vid_20261031_4d916bad/720p.mp4 37 2026-11-04T08:43:44Z https://cocake.com/zh/videos/factory-tour/ https://video.kexincases.com/media/posters/vid_20261031_4d916bad/p1.jpg 工厂宣传：18000 平方米的产线 三十几秒的参观片最容易拍成走廊巡礼。真正要看的是四件事：设备吨位与台数、模具房能不能自己修模、内衬区有没有独立除尘、检测室能测哪些项。这四件事定住产能上限和质量下限，也决定交期承诺是算出来的还是喊出来的。面积只是分母，不是能力，它说明摊得开，不说明跑得动，把镜头里的信息换算成数字才有用。 https://video.kexincases.com/media/derived/vid_20261031_4d916bad/720p.mp4 37 2026-11-04T08:43:44Z https://cocake.com/videos/foam-bonding/ https://video.kexincases.com/media/posters/vid_20261031_2af8d442/p1.jpg Foam Bonding: Laminating Layers Two foam sheets become one part through the glue line, not through the glue's reputation. Doubling coat weight from 80 g/m² to 180 g/m² does not double peel strength; it shortens open time, traps air at press, and leaves the bond failing inside the adhesive instead of at the surface. The clip shows spreading, alignment and pressing. What follows separates chemistry, coat weight, open time, pressure and dwell, then closes on the peel figure that decides accept or reject. Treat every range as typical rather than guaranteed: a fresh material pair still needs its own trial piece. https://video.kexincases.com/media/derived/vid_20261031_2af8d442/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/zh/videos/foam-bonding/ https://video.kexincases.com/media/posters/vid_20261031_2af8d442/p1.jpg 内衬粘黏：分层贴合的做法 两层泡棉贴成一块，强度不在胶有多黏，而在胶层有多薄、压得有多实。涂胶量从 80 g/m² 加到 180 g/m²，剥离强度不会线性上升，开放时间反而缩短，压合时溢胶、包气、局部缺胶会一起出现。这一段拍的是刷胶、对位、压合三个动作，下面按胶种路线、涂胶量、开放时间、压力与保压、验收判据逐项拆开。文中数字是常见区间，换一对材料仍要重新试贴。 https://video.kexincases.com/media/derived/vid_20261031_2af8d442/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/videos/foam-cutting/ https://video.kexincases.com/media/posters/vid_20261031_b8c1e18a/p1.jpg Foam Cutting: Tool Path and Tolerance Foam does not hold tolerance because the blade is sharp. It holds because the machine, the path and the workholding agree. Change the feed from 800 mm/min to 2000 mm/min on the same drawing and the kerf widens, corners round over, the bottom of a stack drifts. The clip follows the tool around one shaped pocket. What follows takes each setting that actually moves the number and describes the mark it leaves when it is wrong. Figures are typical bands, not guarantees. https://video.kexincases.com/media/derived/vid_20261031_b8c1e18a/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/zh/videos/foam-cutting/ https://video.kexincases.com/media/posters/vid_20261031_b8c1e18a/p1.jpg 内衬切割：刀路与尺寸控制 振动刀切泡棉，尺寸稳不稳不取决于刀磨得多快，取决于机床状态、刀路参数和工件固定三件事是否对得上。同一张图纸，进给从 800 mm/min 提到 2000 mm/min，切缝会变宽，内角会变圆，叠切的下层会整体偏移。这一段拍的是刀头走完一个异形槽的全过程，下面把能调的参数逐项拆开，说清每一项调错之后在成品上留下什么痕迹。文中数值取常见区间，换一台设备或换一种密度都要重新试切。 https://video.kexincases.com/media/derived/vid_20261031_b8c1e18a/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/videos/foam-insert-making/ https://video.kexincases.com/media/posters/vid_20261031_6fc96716/p1.jpg How a Perfect Foam Insert Is Made A snug insert is not cut, it is measured and then given room. The pocket in the clip looks like one pass of a router. Behind it sit three calculations: the outline follows the largest envelope, the depth follows the draft, and the cutter radius is compensated at every corner. Get any one wrong and the part either will not go in or rattles once it does. https://video.kexincases.com/media/derived/vid_20261031_6fc96716/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/zh/videos/foam-insert-making/ https://video.kexincases.com/media/posters/vid_20261031_6fc96716/p1.jpg 完美贴合的内衬是怎么做出来的 内衬的贴合度不是切出来的，是量出来、留出来的。片子里的凹槽看着是一刀成形，前面其实压着三笔账：外形按最大包络取，深度按拔模方向让，刀径按转角半径补。三笔账任何一笔算错，成品要么紧到塞不进，要么松到晃荡。材料回弹与吸湿还会把尺寸再挪 0.2% 到 0.4%，留量得按最严工况取。下面把每一笔的取值和判据摊开，方便对着样件复核。 https://video.kexincases.com/media/derived/vid_20261031_6fc96716/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/videos/foam-insert-workshop/ https://video.kexincases.com/media/posters/vid_20261031_25a48852/p1.jpg Foam Workshop: Cutting and Bonding Inserts A foam shop ships what its flow allows, not what its machines allow. Reorder two benches, let work in progress sit an extra two days, or lose ten points of humidity in the rainy season, and the same drawing starts producing a different part each morning. The clip follows material across the floor and the card that travels with the batch. Five sections cover station order, WIP limits, climate, scrap and rework, and shift output. Treat the figures as bands, then correct them against your own log. https://video.kexincases.com/media/derived/vid_20261031_25a48852/720p.mp4 23 2026-11-04T08:43:44Z https://cocake.com/zh/videos/foam-insert-workshop/ https://video.kexincases.com/media/posters/vid_20261031_25a48852/p1.jpg 内衬车间：泡棉加工的实际流程 内衬车间的产出不是机器决定的，是流转和环境决定的。同一台设备，工位顺序调一下、在制品多堆两天、梅雨季湿度上来十个点，出来的件就开始一天一个尺寸。这一段拍的是料在车间里怎么走、卡怎么填、环境怎么记。下面按工位顺序、在制品周转、温湿度、边角料与返工、单班产出五项拆开，数字取常见区间，具体到某个车间要拿自己的记录去修正。 https://video.kexincases.com/media/derived/vid_20261031_25a48852/720p.mp4 23 2026-11-04T08:43:44Z https://cocake.com/videos/foam-to-finished-case/ https://video.kexincases.com/media/posters/vid_20261031_5d713874/p1.jpg Foam to Finished Case: Fitting the Insert Foam can be cut to the drawing and still sit wrong once it is inside the shell. Four decisions settle the outcome: which corner serves as the datum, how much air each wall gets, how far the lid layer is squeezed, and whether the sheet is glued or strapped down. None of them is expensive. Get one wrong and the whole batch feels off at the latch. Get them right and the lid closes in one motion, a technician can lift the sheet out whole, and a single operator holds the fit time all shift without the case fighting back. https://video.kexincases.com/media/derived/vid_20261031_5d713874/720p.mp4 22 2026-11-04T08:43:44Z https://cocake.com/zh/videos/foam-to-finished-case/ https://video.kexincases.com/media/posters/vid_20261031_5d713874/p1.jpg 内衬到成品：装配衔接 内衬在台面上量得再准，装进箱里也可能歪。差别全在基准：以哪个角起量、每条边留多少、盖衬压几毫米、用胶还是用搭扣。这四件事决定合盖是不是一下到底，决定返修时能不能把整片取出来，也决定装配线上一个人 90 秒装不装得完一只。内衬与箱腔的单边间隙按 0.5–1.5 mm 控制，跑出这个区间，前面所有精度都白做。 https://video.kexincases.com/media/derived/vid_20261031_5d713874/720p.mp4 22 2026-11-04T08:43:44Z https://cocake.com/videos/from-mould-to-finished-case/ https://video.kexincases.com/media/posters/vid_20261031_f8a7793e/p1.jpg From Mould to Finished Case A case is decided long before the first part drops out. Draft angle, mould temperature, cooling spread, ejection travel and flash are all baked into steel, and the first-off check is where you learn whether the tool behaves. What follows is what a moulder watches on that first shot and again at every service interval. A mould rarely fails overnight. It drifts a tenth of a millimetre at a time, and the drift always surfaces somewhere specific: draft pulls white at a corner, uneven cooling crowns the lid, a worn vent leaves flash on the joint. https://video.kexincases.com/media/derived/vid_20261031_f8a7793e/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/zh/videos/from-mould-to-finished-case/ https://video.kexincases.com/media/posters/vid_20261031_f8a7793e/p1.jpg 从模具到成品：一只箱子的诞生 一只箱子在钢模里就已经定型。脱模斜度决定能不能顺利顶出，模温与冷却水温差决定翘不翘，顶针位置决定密封槽平不平，飞边高度决定盖压不压得到底。这些参数在首件那 20–30 分钟里被逐项量一遍：12 项过，才允许开批；不过，回去改模或改参数，改完重来。模具很少一夜之间坏掉，它是一次零点几毫米地漂。 https://video.kexincases.com/media/derived/vid_20261031_f8a7793e/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/videos/from-pellets-to-case/ https://video.kexincases.com/media/posters/vid_20261031_a8193338/p1.jpg From Pellets to Case: Rotomoulding in Motion Seventeen seconds covers charging, heating, rotation, cooling and demoulding. It cannot show how wall thickness is decided across those five steps, because nothing in rotomoulding is pressed into shape. Powder sticks, melts and levels against a hot tool under gravity alone, and a fraction of a minute in the wrong place leaves a corner a millimetre thin. https://video.kexincases.com/media/derived/vid_20261031_a8193338/720p.mp4 17 2026-11-04T08:43:44Z https://cocake.com/zh/videos/from-pellets-to-case/ https://video.kexincases.com/media/posters/vid_20261031_a8193338/p1.jpg 从融料到成品：滚塑箱的成型过程 一段十七秒的片子能拍完投料、加热、旋转、冷却、脱模五个动作，但拍不出壁厚是怎么被这五步一步步定下来的。滚塑没有注塑那样的高压，壁厚全靠粉料在热模内壁上粘、熔、流平，任何一个环节差一点，成品就在角部薄掉一毫米。这个位置薄一毫米，1.2 m 跌落就从那里开裂；收缩算错，一米长的盖缝就合不上。 https://video.kexincases.com/media/derived/vid_20261031_a8193338/720p.mp4 17 2026-11-04T08:43:44Z https://cocake.com/videos/from-production-to-testing/ https://video.kexincases.com/media/posters/vid_20261031_3578c9ad/p1.jpg From Production to Testing Testing is not a separate department that grabs a few cases at random. Every check on the list exists because some production drift can defeat it, and the sampling plan is written around that pairing. Structure gets one acceptance level, appearance gets another, because the two fail in different ways and at different costs. Batches are coded in three segments so a failure can walk back to a resin lot, a mould and a shift, and a retained sample is what makes that walk possible six months later, when nobody remembers the run. https://video.kexincases.com/media/derived/vid_20261031_3578c9ad/720p.mp4 22 2026-11-04T08:43:44Z https://cocake.com/zh/videos/from-production-to-testing/ https://video.kexincases.com/media/posters/vid_20261031_3578c9ad/p1.jpg 生产到实测：一条片看完 测试不是最后随便抽几只去摔。每一个测试项背后都站着一条具体的生产偏差：壁厚偏薄对应转角开裂，合模缝错位对应渗水，扣合力不足对应运输弹开。抽样数、AQL、留样期、批号层级，都是为了让这条因果链在几个月后还能倒着走回去：每批抽 8–32 只，留样存 6–12 个月，2 小时内锁定同批范围，而不是把整批货翻一遍。 https://video.kexincases.com/media/derived/vid_20261031_3578c9ad/720p.mp4 22 2026-11-04T08:43:44Z https://cocake.com/videos/how-cases-are-made/ https://video.kexincases.com/media/posters/vid_20261031_e8dc9204/p1.jpg How a Protective Case Is Made Seventeen seconds is enough to film five stations. It is not enough to show which one decides the quality of the case, because the answer is the first. Moulding fixes wall thickness and flatness. Trimming either protects the gasket groove or quietly ruins it. Assembly sets the torque that has to survive a drop. The air test only reads back what the other four steps produced. https://video.kexincases.com/media/derived/vid_20261031_e8dc9204/720p.mp4 17 2026-11-04T08:43:44Z https://cocake.com/zh/videos/how-cases-are-made/ https://video.kexincases.com/media/posters/vid_20261031_e8dc9204/p1.jpg 防护箱是这样炼出来的 十几秒的片子能走完五个工位，却看不出工艺水平卡在哪一环。答案在最早那道不可逆的工序：成型定下壁厚与平面度，修边决定密封槽口是否完整，装配决定跌落时先裂哪里，气密测试只是把前四步的结果读成一个压降值。把每站的判据摊开，既能判断一只箱子的短板，也能看出返工是在解决问题还是在遮问题。 https://video.kexincases.com/media/derived/vid_20261031_e8dc9204/720p.mp4 17 2026-11-04T08:43:44Z https://cocake.com/videos/injection-moulding-workshop/ https://video.kexincases.com/media/posters/vid_20261031_3c6c4dd9/p1.jpg Injection Moulding Workshop: How the Shell Is Formed A moulding shop is quieter than visitors expect: the thud of closing platens, one short hiss from the robot, then nothing at all until the next cycle comes around. Whether a press runs well has little to do with how fast it cycles. It comes down to whether clamp force holds, mould temperature drifts, and cycle time repeats. Between hopper and outgoing tray sits a 25 to 60 second window cut into four stages, each with its own pass or fail line. What follows is the ledger the operators keep, and the arithmetic behind every choice on the floor. https://video.kexincases.com/media/derived/vid_20261031_3c6c4dd9/720p.mp4 24 2026-11-04T08:43:44Z https://cocake.com/zh/videos/injection-moulding-workshop/ https://video.kexincases.com/media/posters/vid_20261031_3c6c4dd9/p1.jpg 注塑车间：箱体成型的现场记录 注塑车间里没有多少声音，只有开合模的闷响，和机械手取件那一下短促的气声。一台机跑得好不好，不看它多快，看它稳不稳：锁模力够不够、模温飘不飘、周期有没有忽长忽短。一只箱体从料斗到托盘，中间隔着 25 秒到 60 秒的四个阶段，每一段都有自己的判据和失败模式。下面记的，是机台上真实在记的那本账。 https://video.kexincases.com/media/derived/vid_20261031_3c6c4dd9/720p.mp4 24 2026-11-04T08:43:44Z https://cocake.com/videos/loading-and-shipping/ https://video.kexincases.com/media/posters/vid_20261031_e85c71f8/p1.jpg Loading and Shipping: Container Day Container day looks like three verbs: lift, place, strap. The hours actually go into counting and into evidence. One case takes 2.4 to 5.0 seconds to tick off, and two people count separately, so a single missing carton sends the whole pallet back through the line. Get the load plan wrong and the weight rides on the steer axle; a few hundred kilometres later the corners have folded. What the dock records is not that loading finished, but which step happened and what proves it. Three artefacts have to agree by the end of the shift: the count sheet, the photo set, the seal number. https://video.kexincases.com/media/derived/vid_20261031_e85c71f8/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/zh/videos/loading-and-shipping/ https://video.kexincases.com/media/posters/vid_20261031_e85c71f8/p1.jpg 出货现场：装柜与清点 装柜这件事，动作只有搬、放、绑三步，真正花时间的是核对与留证。一只箱子 2.4 秒到 5.0 秒点完，两个人各点一遍，差一只就整托重开；柜内配载定错一段，重量就全压在前桥上，跑上几百公里，箱角先塌。出货现场记的不是「装完了」这三个字，而是哪一步、谁做的、凭什么说它对。一天收工，点数表、照片、封条号三样要对得上，缺一样这一柜就算没装完。 https://video.kexincases.com/media/derived/vid_20261031_e85c71f8/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/videos/oem-your-brand/ https://video.kexincases.com/media/posters/vid_20261031_43c90119/p1.jpg Your Brand, Our Manufacturing Private label is not a logo dropped onto an existing shell. Four questions decide whether the project runs smoothly in year two: who owns the drawing, who owns the tool, who signs off a change, and why a first order costs more than a repeat. Settle them while the quotation is still open, and the arguments never happen. One missing sentence in a contract usually costs three batches of margin to repair. https://video.kexincases.com/media/derived/vid_20261031_43c90119/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/zh/videos/oem-your-brand/ https://video.kexincases.com/media/posters/vid_20261031_43c90119/p1.jpg 您的品牌，我们的制造 贴牌不是把 LOGO 印上去就完事。图纸谁出、模具归谁、改模谁签字、首单和返单差在哪，这四件事在报价阶段不谈清，量产半年后一定扯皮，合同里少写一句，后面要用三批货的利润去补。片子把三种合作模式并排摆出来，实际谈判时按这四条逐项落纸，比看厂房照片有用得多。下面把每一档的分工、费用和验收口径拆开讲。 https://video.kexincases.com/media/derived/vid_20261031_43c90119/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/videos/plastic-parts/ https://video.kexincases.com/media/posters/vid_20261031_9fbb5d1c/p1.jpg Plastic Parts: Small Parts, Real Tolerances Latches, corner caps and feet make up under 8% of a case's cost and often more than 30% of its failures. The reason is arithmetic: these parts measure 20 mm to 60 mm with a ±0.05 mm to ±0.10 mm band, while moulding shrinkage alone drifts 0.2% between lots. On a 40 mm latch that drift consumes nearly half the band before a single cavity is cut. https://video.kexincases.com/media/derived/vid_20261031_9fbb5d1c/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/zh/videos/plastic-parts/ https://video.kexincases.com/media/posters/vid_20261031_9fbb5d1c/p1.jpg 塑料件生产：小件也有公差 锁扣、护角、脚垫在整只箱子上占的成本不到 8%，占的失效比例却常超过三成。原因不复杂：这些小件的尺寸只有 20 mm 到 60 mm，公差带 ±0.05 mm 到 ±0.10 mm，而注塑收缩率本身就有 0.2% 的批间波动。也就是说，一件 40 mm 的锁扣，光和收缩带来的漂移就吃掉公差带的四成。剩下六成靠模具、模温和检验去守。小件不是缩小的大件，它的公差要按绝对值算，不能按百分比摊。 https://video.kexincases.com/media/derived/vid_20261031_9fbb5d1c/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/videos/pov-case-assembly/ https://video.kexincases.com/media/posters/vid_20261031_349c7e8e/p1.jpg POV: Assembling a Protective Case Watching a case come together tells you more than any drawing does. The gasket drops into the groove first, the insert gets pressed home, the hardware goes on last. That order is not tradition, it is error proofing. Fit the latch before the gasket and the seal can never be pressed around the full perimeter. Fit the trim before the insert and the liner sits on screw heads, 2 mm proud however hard you push. One case takes 120 to 300 seconds and turns over in your hands three times. https://video.kexincases.com/media/derived/vid_20261031_349c7e8e/720p.mp4 49 2026-11-04T08:43:44Z https://cocake.com/zh/videos/pov-case-assembly/ https://video.kexincases.com/media/posters/vid_20261031_349c7e8e/p1.jpg 第一视角：组装一只防护箱 第一视角装一只箱子，动作是连贯的：条先落槽，内件压进去，五金最后上。顺序不是习惯，是防错。先上五金，密封条就没法整圈压到位；先装外件，内衬会被螺钉头顶住，怎么按都差 2 mm。一只箱子 120 秒到 300 秒装完，4 kg 到 12 kg 在手上翻三次，每一次翻转都得有理由。手上的停顿、按压的力度、拧紧的圈数，最后都能换算成秒和牛顿。 https://video.kexincases.com/media/derived/vid_20261031_349c7e8e/720p.mp4 49 2026-11-04T08:43:44Z https://cocake.com/videos/pov-foam-installation/ https://video.kexincases.com/media/posters/vid_20261031_fa8ad872/p1.jpg POV: Installing the Foam Insert Two people can fit the same insert into the same case and finish forty seconds apart. One presses it home and moves on; the other spends the difference chasing a corner that keeps lifting. The foam did not change between them. What changed is where the force went. An insert holds itself against the wall by being slightly larger than the cavity, and that same oversize is what pushes back at your hands. What follows is the order of operations: where resistance comes from, how much powder is enough, which corner to seat first, how failures divide, and what it takes to pull an insert back out. https://video.kexincases.com/media/derived/vid_20261031_fa8ad872/720p.mp4 45 2026-11-04T08:43:44Z https://cocake.com/zh/videos/pov-foam-installation/ https://video.kexincases.com/media/posters/vid_20261031_fa8ad872/p1.jpg 第一视角：给箱子装内衬 内衬装不进去，八成不是内衬做错了。同一条装配线上，同一只内衬有人 60 秒压到位，有人 150 秒还在跟一个翘起的边角较劲，差别在手上的顺序和对阻力的判断。内衬与箱壁之间靠过盈贴住，过盈量既给你贴合也给你阻力；温度低、静电大、边角先撞上，阻力就从 40 N 一路涨到 180 N。下面按动作顺序拆开：阻力从哪来、粉怎么用、先压哪里、缺陷怎么分、拆出来返修要多大力。 https://video.kexincases.com/media/derived/vid_20261031_fa8ad872/720p.mp4 45 2026-11-04T08:43:44Z https://cocake.com/videos/why-the-pins-matter/ https://video.kexincases.com/media/posters/vid_20261031_501487a5/p1.jpg Why These Pins Matter A worn pin never announces itself. What arrives first is a lid that shifts a millimetre under your hand, then a lid you have to guide shut, then a seam that no longer lines up — one side of the gasket crushed flat, the other barely touching. The leak shows up months later, on a wet day, when the contents are already damp. Every step in that chain has a number attached: play, lid offset, gasket compression. All of them can be measured at the case, without taking anything apart. https://video.kexincases.com/media/derived/vid_20261031_501487a5/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/zh/videos/why-the-pins-matter/ https://video.kexincases.com/media/posters/vid_20261031_501487a5/p1.jpg 这些小销钉为什么重要 销钉松掉的那天，箱子不会响，也不会报警。先出现的是盖子能左右晃一点点，合上时要用手扶一下；再往后合缝不齐，一侧的密封条被压得死紧，另一侧几乎没贴上；等到雨天出一次门，才发现里面潮了。这条链子上每一环都有可测的量：晃动量从 0.3 mm 涨到 1.5 mm，盖体偏 0.5 mm 到 2 mm，密封压缩量变 5% 到 12%。下面写怎么在自己手上把这几步量出来，以及什么时候该换。 https://video.kexincases.com/media/derived/vid_20261031_501487a5/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/videos/1620kg-load-challenge/ https://video.kexincases.com/media/posters/vid_20261031_44febf8a/p1.jpg 1620 kg Load Challenge: What Was Recorded The number on the display is not a property of the case. It is a property of the rig. Platen size, support span, backing plate thickness, loading rate, hold time and eccentricity all feed into it, and change any one of them and the same box reads differently: widen the platen and pressure per unit area collapses, slide the supports out and deflection climbs with the cube of span. This page stays on that geometry problem, because a load figure quoted without its rig is not something you can carry over to your own bench. https://video.kexincases.com/media/derived/vid_20261031_44febf8a/720p.mp4 27 2026-11-04T08:43:44Z https://cocake.com/zh/videos/1620kg-load-challenge/ https://video.kexincases.com/media/posters/vid_20261031_44febf8a/p1.jpg 1620KG 承重挑战：现场记录 1620 kg 压下去，读数出来，很多人只记住那一个数字。这个数字其实是被工装写出来的：加载板多大、支点放在哪、垫板多厚、压得多快、压住多久、压头偏了多少，六项一起决定读数。换一套工装，同一只箱子能读出完全不同的结果。这一篇只讲加载几何，讲清楚为什么离开工装参数的承重数字不能直接搬用。 https://video.kexincases.com/media/derived/vid_20261031_44febf8a/720p.mp4 27 2026-11-04T08:43:44Z https://cocake.com/videos/2208kg-load-challenge/ https://video.kexincases.com/media/posters/vid_20261031_d20aa7cc/p1.jpg 2208 kg Load Challenge: What Was Recorded The second the ram lands is the good footage: the lid dips, the frame steadies, the number climbs. What decides whether the case still has a working life is the small amount that stays behind once the load is gone. Two cases in the same batch can peak within a fraction of a millimetre of each other and still differ threefold in what they keep, and a third difference shows up when you press them again. This page follows the case after release: how much came back, how much stayed, and how much returns by the next morning. https://video.kexincases.com/media/derived/vid_20261031_d20aa7cc/720p.mp4 28 2026-11-04T08:43:44Z https://cocake.com/zh/videos/2208kg-load-challenge/ https://video.kexincases.com/media/posters/vid_20261031_d20aa7cc/p1.jpg 2208KG 承重挑战：现场记录 2208 kg 压下去的那一秒最好看，压头停住、盖面下沉、画面有分量。可决定这只箱子还能不能继续用的，是卸载之后剩下的那一点。同一批箱体里，峰值下凹只差零点几毫米的两只，残余量能差三倍，二次加载的斜率也能差出一截。这一篇只讲卸载之后的账：回弹了多少、留下了多少、明天早上又恢复了多少。 https://video.kexincases.com/media/derived/vid_20261031_d20aa7cc/720p.mp4 28 2026-11-04T08:43:44Z https://cocake.com/videos/3422a-water-test/ https://video.kexincases.com/media/posters/vid_20261031_3cb54d18/p1.jpg 3422A Water Test: Model Specific On this model the seal is not one line under even pressure. It runs the full lip — somewhere between 1200 and 2600 mm of perimeter — and gets interrupted twice at the hinge pins and again beside each of the 2–4 latch seats. Count those breaks and the loop becomes four segments. Their compression differs, and the case is only as watertight as the weakest one, which carries 40–65% of the leak risk. What follows walks the line segment by segment. https://video.kexincases.com/media/derived/vid_20261031_3cb54d18/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/zh/videos/3422a-water-test/ https://video.kexincases.com/media/posters/vid_20261031_3cb54d18/p1.jpg 3422A 防水测试：型号专项 3422A 的密封线不是一条均匀受压的橡皮筋。它绕着箱口走一圈，周长在 1200–2600 mm 之间，中途被两处铰链穿孔和 2–4 个锁扣座打断，闭合成四段。四段的压缩量各不相同，各自从 20–35% 的区间里取一个值，整箱漏不漏却由最弱的那一段决定，而这一段往往占去 40–65% 的渗漏机会。下面按段走一遍，先数段，再谈漏。 https://video.kexincases.com/media/derived/vid_20261031_3cb54d18/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/videos/8-series-load-challenge/ https://video.kexincases.com/media/posters/vid_20261031_a9124e51/p1.jpg 8 Series Load Challenge: Three Sizes Compared Three sizes from the 8 series, one rig, one indenter, one load step. The eye goes to the biggest case because it moves the most, and that reading means almost nothing until the support span is written beside it. Spans in this group run from 480 mm to 1180 mm, so a good share of the gap between the numbers is geometry rather than weakness. Divide deflection by span and the ranking rearranges itself. What follows is how to do that division, and what to ignore once it is done. https://video.kexincases.com/media/derived/vid_20261031_a9124e51/720p.mp4 20 2026-11-04T08:43:44Z https://cocake.com/zh/videos/8-series-load-challenge/ https://video.kexincases.com/media/posters/vid_20261031_a9124e51/p1.jpg 8 系列三款箱体承重挑战 三只不同尺寸的 8 系列箱体并排上架，同一套压头、同一档载荷，画面里最容易被记住的是最大的那只下凹最多。这个印象只在一种条件下成立：三只箱子的支点跨距一样。实际并排时跨距从 480 mm 铺到 1180 mm，读数差里有一大半只是几何差。把下凹除以跨距，排序会变，这一页讲的就是这个除法怎么做、做完之后哪些数还值得看。 https://video.kexincases.com/media/derived/vid_20261031_a9124e51/720p.mp4 20 2026-11-04T08:43:44Z https://cocake.com/videos/803-load-challenge/ https://video.kexincases.com/media/posters/vid_20261031_58719579/p1.jpg 803 Load Challenge: One Model, One Test One case, one load step, three places to put the indenter, and readings that differ by a factor of three to seven. The clip shows a single run of the three, and it is the run most likely to be mistaken for a statement about strength. What it really shows is the contact patch. Move the indenter from 40 mm to 200 mm across and the pressure beneath it changes twenty-five fold, enough to turn a bent panel into a crushed patch of surface. The rest of this page separates those outcomes. https://video.kexincases.com/media/derived/vid_20261031_58719579/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/zh/videos/803-load-challenge/ https://video.kexincases.com/media/posters/vid_20261031_58719579/p1.jpg 803 承重挑战：单型号记录 同一只 803，同一档载荷，压头落在面心、棱边、角部，读数能差 3 倍到 7 倍。片子给的是其中一次，最容易让人以为自己在看箱体强度；实际看到的是压头与箱面接触的那一小块面积。这一页把三个位置的接触条件拆开看：压头边长多大、压痕留在哪、角部那圈圆角和几道筋替箱壁挡掉了多少力。 https://video.kexincases.com/media/derived/vid_20261031_58719579/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/videos/806-load-challenge/ https://video.kexincases.com/media/posters/vid_20261031_5d54e3be/p1.jpg 806 Load Challenge: Watching for Deflection Deflection on the 806 is a map rather than a figure. Nine to twenty-five gauges sit across the lid at 50 mm to 150 mm spacing, and each returns a number once load is on and held. The largest of them, 3 mm to 9 mm, usually sits off-centre by 20 mm to 120 mm, parked near a latch seat or on the side where the supports moved inward. Where that peak sits is more revealing than its size, and the lid seam tells you more again. Both are worth reading before saying anything about the moulding itself. https://video.kexincases.com/media/derived/vid_20261031_5d54e3be/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/zh/videos/806-load-challenge/ https://video.kexincases.com/media/posters/vid_20261031_5d54e3be/p1.jpg 806 承重挑战：单型号记录 806 的下凹不是一个数，是一张图。盖面上布 9 个到 25 个测点，网格间距 50 mm 到 150 mm，加载到保压结束，每个点各给一个读数。面心最大下凹 3 mm 到 9 mm，可它常常不在盖面正中，而是偏出去 20 mm 到 120 mm，落在锁扣座或者支点内移的那一侧。这一页讲怎么布点、怎么读这个偏移，以及盖口那 0.5 mm 到 2.0 mm 的错位为什么比下凹更该盯。 https://video.kexincases.com/media/derived/vid_20261031_5d54e3be/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/videos/814-load-challenge/ https://video.kexincases.com/media/posters/vid_20261031_a84a33c6/p1.jpg 814 Load Challenge: One Model at a Time Take one case and press it in three rooms held at different temperatures. The case is the same object; the material inside it is not behaving the same way. We ran −20 ℃, 23 ℃ and 50 ℃, letting each case settle before it went onto the same rig. What follows traces one variable only: how stiffness shifts with temperature, why cold makes a wall crack before it bends, and why heat lets it settle down. Every figure is a typical range, never a promise about a single unit. https://video.kexincases.com/media/derived/vid_20261031_a84a33c6/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/zh/videos/814-load-challenge/ https://video.kexincases.com/media/posters/vid_20261031_a84a33c6/p1.jpg 814 承重挑战：单型号记录 同一只箱子，在三间不同温度的房间里压三次，读数会差出一截——箱子没换，材料换了。−20 ℃、23 ℃、50 ℃ 三档，每档先进恒温室待够时间，再上同一套加载工位。这一篇只沿温度这一根轴走：模量怎么随温度变，低温为什么先裂后弯，高温为什么慢慢塌下去。下面所有读数都是典型区间，不是任何一只箱子的保证值。 https://video.kexincases.com/media/derived/vid_20261031_a84a33c6/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/videos/865-trolley-water-test/ https://video.kexincases.com/media/posters/vid_20261031_a7f4c291/p1.jpg 865 Trolley Case Water Test: Handle and Wheels A plain case has one closed seal and that is the whole story. A trolley case has holes. The handle cavity has to cross the back wall, the wheel housings have to be screwed on, and the axles have to exit somewhere. None of those sit on the seal line, yet each one leads into the case or into a cavity that shares space with it. This piece walks the three families of opening: how each is closed, where cavity water drains, and why the film thrown off a rolling wheel climbs back in. https://video.kexincases.com/media/derived/vid_20261031_a7f4c291/720p.mp4 22 2026-11-04T08:43:44Z https://cocake.com/zh/videos/865-trolley-water-test/ https://video.kexincases.com/media/posters/vid_20261031_a7f4c291/p1.jpg 865 拉杆箱防水测试：拉杆位重点 普通箱只有一条闭合密封线，拉杆箱多出来的全是洞。拉杆腔要穿壁，腔里能存 1.5–6 L 水，轮座要打螺钉，轮轴要开孔——这些位置不在密封线上，却直接通向箱内，或者通向一个和箱内相通的腔。865 这一篇把三类开口逐个走一遍：每处怎么封，腔里的水往哪排，轮子转起来甩出的水膜为什么顺着轴孔往里爬。 https://video.kexincases.com/media/derived/vid_20261031_a7f4c291/720p.mp4 22 2026-11-04T08:43:44Z https://cocake.com/videos/866-trolley-water-test/ https://video.kexincases.com/media/posters/vid_20261031_ea5f3ce7/p1.jpg 866 Trolley Case Water Test: Full Spray A full spray looks like weather. It is not. Every value in it was chosen by someone: nozzle at 300 mm or 800 mm, 40 L or 180 L per run, 180 s or 900 s of exposure. Change the choices and the same shell reads as leaking or tight. The clip shows water and nothing else, no layout, no water accounting, no repeat count. Read the rig correctly and you can call the verdict before the pump starts. This page puts the missing parts back and explains why a case that dripped on one bench comes out dry on the next. https://video.kexincases.com/media/derived/vid_20261031_ea5f3ce7/720p.mp4 23 2026-11-04T08:43:44Z https://cocake.com/zh/videos/866-trolley-water-test/ https://video.kexincases.com/media/posters/vid_20261031_ea5f3ce7/p1.jpg 866 拉杆箱防水测试：整箱喷淋 整箱喷淋看着最像下雨，其实每一个参数都是人定的：喷头离箱面 300 mm 还是 800 mm，一轮浇 40 L 还是 180 L，浇 180 秒还是 900 秒。三个选择能得出三种结论。片子里只有十几秒的水幕，看不到喷淋怎么布置、水量怎么核算、重复了几轮。这一页把这些摊开，说明什么样的一次喷淋才算公平，以及同一只箱子换个台架为什么就不漏了。 https://video.kexincases.com/media/derived/vid_20261031_ea5f3ce7/720p.mp4 23 2026-11-04T08:43:44Z https://cocake.com/videos/beyond-the-limit/ https://video.kexincases.com/media/posters/vid_20261031_24f71c70/p1.jpg Beyond the Limit: Outside Normal Use Four axes define the edge of normal use: load, temperature, time and chemical contact. Crossing one is usually explainable. Crossing two at once is what outside the design envelope actually means, and it is the combination, not the single axis, that catches people out. The clip shows the crossing; this page covers the margin that existed before it and the strength that remains after. Design margin is taken at 1.5–2.0×, residual strength lands between 60 and 85 percent, and the gap between those two figures is the whole basis for a keep-or-retire call. https://video.kexincases.com/media/derived/vid_20261031_24f71c70/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/zh/videos/beyond-the-limit/ https://video.kexincases.com/media/posters/vid_20261031_24f71c70/p1.jpg 极限之下：超出常规的工况 四根轴——载荷、温度、时间、化学品——各有一个自己的超限点。单独越界一根还算可解释，两根一起越界才叫超出设计范围。片子拍的是越界那一下，这一页写的是越界之前还剩多少余量、越界之后还剩多少强度。设计安全裕度按 1.5–2.0 倍取，超限之后剩余强度落在 60–85%，这两个数之间剩下的距离，就是还能不能继续用的全部判断空间。 https://video.kexincases.com/media/derived/vid_20261031_24f71c70/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/videos/camera-case-water-test/ https://video.kexincases.com/media/posters/vid_20261031_a7c0dcea/p1.jpg Camera Case Water Test Press the case under water, wait, lift it out, dry it, open it. The decisive part of that sequence happens off camera: water rarely forces its way past the gasket from outside, it gets drawn in by the vacuum the case creates itself. This page covers groove geometry, compression ratio, latch spacing, and why the same case passes once and leaks on the fifth try. https://video.kexincases.com/media/derived/vid_20261031_a7c0dcea/720p.mp4 24 2026-11-04T08:43:44Z https://cocake.com/zh/videos/camera-case-water-test/ https://video.kexincases.com/media/posters/vid_20261031_a7c0dcea/p1.jpg 相机防护箱防水测试 把箱子整个按进水里，等一段时间，提出来擦干，开盖看内部——这个过程里最关键的一段其实在镜头之外：水没有从密封条正面挤进来，而是被箱内的负压吸进去的。片子里能看到浸泡时长和水面状态，看不到的是沟槽几何、压缩率、锁扣跨距，以及为什么同一只箱子第一次不漏、第五次漏。这一页讲这几项。 https://video.kexincases.com/media/derived/vid_20261031_a7c0dcea/720p.mp4 24 2026-11-04T08:43:44Z https://cocake.com/videos/can-this-case-pass-a-water-test/ https://video.kexincases.com/media/posters/vid_20261031_b5e37b1a/p1.jpg Can This Case Pass a Water Test? Whether a case leaks is half hardware and half method. The glance you take when the lid opens is the weakest evidence available: water on a dark liner leaves almost no trace, and a few grams disappears under a cloth. The same case reads as a pass by eye, a seep by indicator paper, and a clear failure on a balance. The clip only shows the lid coming up. It does not show where the paper went, how much gain counts as a leak, or whether water trapped in a wall cavity is scored at all. This page deals with the judging side alone. https://video.kexincases.com/media/derived/vid_20261031_b5e37b1a/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/zh/videos/can-this-case-pass-a-water-test/ https://video.kexincases.com/media/posters/vid_20261031_b5e37b1a/p1.jpg 这个防护箱能扛住防水测试吗 漏水这件事，一半在箱子上，一半在怎么判。开盖那一眼最不可靠：水在黑色内衬上几乎不留痕迹，几克的量用布一擦就没了。同一只箱子，用眼睛判是合格，用试纸判是渗，用天平判是明显渗。片子里能看到的只有开盖那一下，看不到试纸铺在哪里、增重多少才算漏、夹层里的水算不算。这一页只讲判定这一侧，把算不算漏从一个感觉变成一个数。 https://video.kexincases.com/media/derived/vid_20261031_b5e37b1a/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/videos/case-drop-rhythm-test/ https://video.kexincases.com/media/posters/vid_20261031_a9ea119e/p1.jpg Case Drop Test: Edges, Corners and Faces Three postures, one case, one drop height: corner first, then edge, then flat. The final cut makes the run look like a single continuous fall, but the numbers behind it do not sit in the same league, and the reason is how much material actually meets the floor at the instant of contact. A corner arrives on 3–8 mm. An edge spreads across an 8–20 mm band. A face lands on 45–95 mm, two orders of magnitude wider. What follows is where each posture sends the energy, why the concentration factor moves through 2.5–6, and why the sequence has to stop between impacts. https://video.kexincases.com/media/derived/vid_20261031_a9ea119e/720p.mp4 19 2026-11-04T08:43:44Z https://cocake.com/zh/videos/case-drop-rhythm-test/ https://video.kexincases.com/media/posters/vid_20261031_a9ea119e/p1.jpg 防护箱跌落测试：多角度连续 同一只箱子，三个姿态连摔：角先着地，再换棱，最后放平。三段的落差一样，读数却不在一个量级，原因全在接触的那一小块有多大。角部接触边长只有 3–8 mm，棱部是 8–20 mm 的一条带，面着地摊到 45–95 mm，接触面积差两个数量级。这一页拆的是这三种姿态各自把动能送到哪里、应力集中系数为什么差出 2.5–6 倍，以及连续摔的时候，中间为什么必须停 20–60 秒再看一眼。 https://video.kexincases.com/media/derived/vid_20261031_a9ea119e/720p.mp4 19 2026-11-04T08:43:44Z https://cocake.com/videos/destruction-test/ https://video.kexincases.com/media/posters/vid_20261031_060b6397/p1.jpg Trying to Destroy This Case Dropped, struck, stood on, crushed and soaked, the case came through intact, but not unchanged. The clip labels every impact with height, mass and landing point; what it cannot label is what happened inside, where the corner wall thinned, how far the foam compressed, what acceleration the contents actually saw. Those are the numbers that set the real margin. https://video.kexincases.com/media/derived/vid_20261031_060b6397/720p.mp4 11 2026-11-04T08:43:44Z https://cocake.com/zh/videos/destruction-test/ https://video.kexincases.com/media/posters/vid_20261031_060b6397/p1.jpg 我试图毁掉这个防护箱 摔、砸、踩、压、泡，这一轮下来箱子没有散，但也没到完好如初。片子把每次冲击的高度、重量和落点都标了出来，能看到的是动作，看不到的是箱体内部发生了什么：角部的壁厚被拉薄到多少、泡棉压缩了几个毫米、内容物承受的加速度峰值有多高。这一页拆的是这几个数，因为它们才决定同类箱子在你手上的实际余量。 https://video.kexincases.com/media/derived/vid_20261031_060b6397/720p.mp4 11 2026-11-04T08:43:44Z https://cocake.com/videos/does-this-case-really-keep-water-out/ https://video.kexincases.com/media/posters/vid_20261031_537ced34/p1.jpg Does This Case Really Keep Water Out? Whether the gasket is actually being squeezed is something you cannot feel your way to. Carbon paper turns it into a picture. Lay a sheet on the gasket, cover it with plain paper, close the case, open it, and the marks left behind map compression along the entire seal line. Width, continuity and the exact place a mark stops tell you more than any snap of a latch. The clip covers two seconds of closing and opening. This page is about reading that sheet, and about what to change once you have. https://video.kexincases.com/media/derived/vid_20261031_537ced34/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/zh/videos/does-this-case-really-keep-water-out/ https://video.kexincases.com/media/posters/vid_20261031_537ced34/p1.jpg 这个防护箱，真的防水吗 合盖那一刻，密封条到底有没有被压到，靠猜是猜不出来的。压痕法把这件事变成一张图：条体上垫一张复写纸，再盖一张白纸，扣上、打开，白纸上的印子就是压缩量沿整条密封线的分布。印子宽不宽、连不连、断在哪个位置，比任何手感都直接。片子里只有扣上再打开的两秒，这一页讲那张纸该怎么读，读完以后又该改什么。 https://video.kexincases.com/media/derived/vid_20261031_537ced34/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/videos/drag-test/ https://video.kexincases.com/media/posters/vid_20261031_71c763f3/p1.jpg Drag Test: Case Against the Ground Five metres and a hundred metres feel much the same at the handle. What the floor takes away is a different story. Drag resistance runs 60–400 N, the friction coefficient moves between 0.25 and 0.7 depending on surface, and the work those forces do has only two destinations: the ribs under the case, and heat at the contact patch. Wear over a single pull lands somewhere between 0.2 and 2.5 mm. This page follows that accounting: how much is gone, how much margin is left, and when lifting one end beats pulling. https://video.kexincases.com/media/derived/vid_20261031_71c763f3/720p.mp4 21 2026-11-04T08:43:44Z https://cocake.com/zh/videos/drag-test/ https://video.kexincases.com/media/posters/vid_20261031_71c763f3/p1.jpg 拖拽测试：箱体与地面的摩擦 拖 5 m 和拖 100 m，握在把手上的手感差别不大，箱底磨掉的量却差出一个数量级以上。阻力落在 60–400 N，摩擦系数随地面从 0.25 走到 0.7，这些力做的功不会消失，一部分变成箱底筋的磨耗，一部分变成接触面的温升。片子拍的是拖拽的全过程，这一页算的是这笔账：磨掉多少、还剩多少余量、什么时候该改成抬起一端。账最后都落在箱底那几条筋上。 https://video.kexincases.com/media/derived/vid_20261031_71c763f3/720p.mp4 21 2026-11-04T08:43:44Z https://cocake.com/videos/handle-load-test/ https://video.kexincases.com/media/posters/vid_20261031_c1f2d405/p1.jpg Handle Load Test: How Much Can It Carry The thinnest link in a protective case is usually the handle, not the shell. The clip shows load going on, a needle climbing, and a handle that starts to lean after a few lifts. What it cannot show is how the force reaches the wall: the span, the pull on each screw, the preload a plastic boss loses in three months at room temperature. https://video.kexincases.com/media/derived/vid_20261031_c1f2d405/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/zh/videos/handle-load-test/ https://video.kexincases.com/media/posters/vid_20261031_c1f2d405/p1.jpg 把手负重测试：能提多重 整只箱子最薄的一环通常是把手，不是箱体。片子里能看见加载、看见指针往上走、看见某一次提放之后把手开始歪，看不见的是力怎么从握把传到箱壁：跨距多少、每颗螺钉吃多少拉力、塑料螺柱在室温下放三个月会掉多少预紧力。这一页把这些数摆出来，用来判断一只箱子的真实提重上限，以及超载之后先坏在哪里。 https://video.kexincases.com/media/derived/vid_20261031_c1f2d405/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/videos/application-scenarios/ https://video.kexincases.com/media/posters/vid_20261031_df7df787/p1.jpg Application Scenarios: Where These Cases Work The same case that survives three years in an inspection lab can be full of grit two weeks into a mine site. The case did not change. The factors around it did. Strip six industries down and only five quantities really shape the hardware: temperature, humidity, particle size, vibration level and how often the thing gets carried — plus a working rhythm, meaning how long a shift runs and how many items ride inside. Measure where you sit first; arguments about wall thickness and foam come a long way after that. https://video.kexincases.com/media/derived/vid_20261031_df7df787/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/zh/videos/application-scenarios/ https://video.kexincases.com/media/posters/vid_20261031_df7df787/p1.jpg 应用场景：这些箱子都在哪里用 同样一只箱子，在检测实验室里用三年不出问题，拉到矿山现场两周就进灰。差别不在箱子，在环境因子。把六类行业拆开看，真正影响结构的只有五个量：温度、相对湿度、粉尘粒径、振动量级、搬运频次，再加一个使用节奏——单次作业多久、一箱装几件。先把自己落在哪一格量出来，再谈加不加厚、换不换内衬，比凭印象挑箱子省事得多。 https://video.kexincases.com/media/derived/vid_20261031_df7df787/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/videos/camera-case/ https://video.kexincases.com/media/posters/vid_20261031_934e60d9/p1.jpg Camera Case: Securing Bodies and Lenses The usual mistake is not running out of space. It is packing too tight, or supporting the gear in the wrong place. Push foam compression past 30% and fingers have to pry the lens out, wearing the rubber ring white within a year. Drop below 10% and everything slides when the case tilts, loading the mount sideways. The clip shows the layout; it cannot show the 15% to 20% window, or which end of the lens should face down. https://video.kexincases.com/media/derived/vid_20261031_934e60d9/720p.mp4 10 2026-11-04T08:43:44Z https://cocake.com/zh/videos/camera-case/ https://video.kexincases.com/media/posters/vid_20261031_934e60d9/p1.jpg 相机防护箱：镜头与机身的固定 相机装进箱子，最容易出错的地方不是「放不下」，而是「放得太紧」和「支撑错位置」。泡棉压缩量超过 30%，取放时手指要用力抠，一年下来镜头橡胶环先磨白；压缩量低于 10%，箱子一倾斜器材就在格子里窜，卡口承受侧向冲击。9 秒的视频只拍得到分区，拍不到 15% 到 20% 这个压缩窗口，也拍不到镜头该朝哪一头放。分区只是结果，压缩量才是原因。 https://video.kexincases.com/media/derived/vid_20261031_934e60d9/720p.mp4 10 2026-11-04T08:43:44Z https://cocake.com/videos/camera-drop-ad/ https://video.kexincases.com/media/posters/vid_20261031_d16b5963/p1.jpg Camera Drop: A Brand Film, Not a Test The fall you see in a brand film is built, not caught. A finished cut runs 15–30 seconds; the drop itself occupies 0.5–1.2 seconds of it. Everything else — an afternoon spent nudging tripods, swapping the mat, waiting for cloud — stays off screen. What follows is the shooting sheet: frame rate, camera count, the height we released from, how thick the floor padding was, how many takes it took, and how long the disclaimer stayed up. It explains why the shot reads as violent, and why it cannot tell you a single thing about the case. https://video.kexincases.com/media/derived/vid_20261031_d16b5963/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/zh/videos/camera-drop-ad/ https://video.kexincases.com/media/posters/vid_20261031_d16b5963/p1.jpg 相机跌落：广告片的表达方式 广告里的那一下跌落，是一群人围着轨道反复摆出来的。成片 15–30 秒，真正的跌落镜头只占 0.5–1.2 秒，其余时间都在调机位、换垫层、等光。这一页把拍摄规格摊开：升格多少倍、几个机位、落高定在哪、地上垫多厚、一条镜头要试多少次，以及片尾那行字幕该停多久。看完你会明白，这段画面为什么好看，又为什么什么都证明不了。 https://video.kexincases.com/media/derived/vid_20261031_d16b5963/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/videos/case-range-showcase/ https://video.kexincases.com/media/posters/vid_20261031_8938517c/p1.jpg The Range: Different Case Types Side by Side Line up five cases and the camera starts lying before the product does. Swap the lens and perspective shifts; raise the tripod and the big one shrinks. So the shooting sheet comes first: one focal length between 50–85 mm, one camera height at 1.2–1.5 m, levelling held inside 2 mm, a 300 mm scale in frame, backdrop pushed back to 1.5–2.5 m. Only then do the three questions — what goes in, how it travels, how long it stays out — turn into a fair shortlist. Get one parameter wrong and a 100 mm gap reads like 200 mm. https://video.kexincases.com/media/derived/vid_20261031_8938517c/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/zh/videos/case-range-showcase/ https://video.kexincases.com/media/posters/vid_20261031_8938517c/p1.jpg 款式一览：同系列不同箱型 把不同箱型摆成一排拍，最容易骗人的不是箱子，是机位。焦段换一支，透视就变；机位高一寸，大的显小、小的显壮。所以这一页先讲怎么拍才可比：焦段锁在 50–85 mm、机位高 1.2–1.5 m、三脚架水平误差压在 2 mm 内、地上立一支 300 mm 的比例尺、背景退到 1.5–2.5 m。规格立住了，再谈三问定档：装什么、怎么搬、暴露多久。摆错一个参数，差 100 mm 的箱子会看成差 200 mm。 https://video.kexincases.com/media/derived/vid_20261031_8938517c/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/videos/console-case/ https://video.kexincases.com/media/posters/vid_20261031_77f65b02/p1.jpg Console Case: Airflow and Fixing A two-kilo console in a case is not a packing problem, it is a heat problem and an impact problem. The clip shows thirteen seconds of closing, lifting and setting down; what it cannot show is how much foam sits across the intake, how much clearance surrounds the chassis, or what the board sees when the case lands. This page takes those three apart. https://video.kexincases.com/media/derived/vid_20261031_77f65b02/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/zh/videos/console-case/ https://video.kexincases.com/media/posters/vid_20261031_77f65b02/p1.jpg 游戏机防护箱：散热与固定 一台两公斤出头的主机塞进箱子，真正要解决的不是装不装得下，而是热量往哪里走、冲击力由谁吸收。片子里的动作只有十几秒：合盖、提起、放下，看不到的是进出风口被泡棉挡住多少、机身四周留了几毫米、跌落时那几十倍重力传到主板上的峰值。这一页把这三件事拆开，给出能照着做的分区方式和余量取值。 https://video.kexincases.com/media/derived/vid_20261031_77f65b02/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/videos/drone-storage/ https://video.kexincases.com/media/posters/vid_20261031_477096fc/p1.jpg How a Drone Should Really Be Stored The parts that fail in a drone case are rarely the airframe. They are the arm hinges and the props. Folded, an arm becomes a cantilever with the hinge taking every bit of bending; a prop is a thin glass-filled nylon part that creeps above 60℃. Neither fails loudly. You find out when the aircraft hovers with a tremor and the footage shows jelly. https://video.kexincases.com/media/derived/vid_20261031_477096fc/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/zh/videos/drone-storage/ https://video.kexincases.com/media/posters/vid_20261031_477096fc/p1.jpg 无人机到底该怎样收纳 无人机装箱坏得最多的不是机身，是机臂转轴和桨叶。机臂折叠后变成一根悬臂，转轴承受全部弯矩；桨叶是尼龙加玻纤的薄壁件，60℃ 以上就开始蠕变。这两处坏起来都不响，等到起飞后姿态抖、航拍画面有果冻效应，才回头怀疑箱子。四区划分不是为了好看，是为了让受力走结构，不走关节。四区不是排版，是受力路径的设计。 https://video.kexincases.com/media/derived/vid_20261031_477096fc/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/videos/drone-storage-done-right/ https://video.kexincases.com/media/posters/vid_20261031_29d28b78/p1.jpg Drone Storage: Arms, Batteries and Controller A drone crew's day opens at the tailgate and closes at the same place. Load before first light, swap packs between sorties, stow before dark — three loops that decide whether a case is worth carrying. Six to eighteen sorties is an ordinary day. Packs run at roughly one per two or three flights, a swap costs 40–90 seconds, batteries are held at 15–25 ℃ once the air turns cold, a full charge takes 2700–5400 seconds, and packing up eats another 300–600 seconds. Those seconds are the crew's real daily budget. https://video.kexincases.com/media/derived/vid_20261031_29d28b78/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/zh/videos/drone-storage-done-right/ https://video.kexincases.com/media/posters/vid_20261031_29d28b78/p1.jpg 无人机收纳：机臂与电池怎么放 航拍队的一天，是从后备箱开始的。起飞前装、落地后换、天黑前收，这三段动作决定一只箱子好不好用，跟箱内怎么分格关系不大。单日 6–18 个架次，电池与架次大致 1:2 到 1:3，飞三个架次就得换一轮电。单次换电 40–90 秒，低温天电池维持在 15–25 ℃，充满一块 2700–5400 秒，收工复位 300–600 秒。这些秒数加起来，才是这支队伍真正的日成本。 https://video.kexincases.com/media/derived/vid_20261031_29d28b78/720p.mp4 16 2026-11-04T08:43:44Z https://cocake.com/videos/every-device-has-its-place/ https://video.kexincases.com/media/posters/vid_20261031_9c061753/p1.jpg Every Device Has Its Place A case holding a dozen devices rarely fails at the hinge. It fails the moment somebody asks where the second battery went. Three habits cover that: a two-part slot code, an inventory card inside the lid, and a packing order set by weight rather than by how neatly things fit. With them in place, a missing item surfaces in ten seconds and a full count closes well inside four minutes. What follows covers the code, the three columns on the card, how deep a pocket should be, and the words two people use when the case changes hands. https://video.kexincases.com/media/derived/vid_20261031_9c061753/720p.mp4 20 2026-11-04T08:43:44Z https://cocake.com/zh/videos/every-device-has-its-place/ https://video.kexincases.com/media/posters/vid_20261031_9c061753/p1.jpg 每一件设备都有自己的位置 一只箱子装十来件设备，拖慢现场的不是箱子，是找不到。给每件设备一个位号，把清单卡贴在盖内，装包按重量和取用频次排序，交接时唱点三句。这三件事做下来，缺一件十秒内就能看出来，盘点两分多钟能收工。下面五段讲位号怎么编、清单卡写哪三列、槽深凭什么定、手指位开在哪里，以及两个人怎么在车边把一箱东西交清楚。 https://video.kexincases.com/media/derived/vid_20261031_9c061753/720p.mp4 20 2026-11-04T08:43:44Z https://cocake.com/videos/extreme-environments/ https://video.kexincases.com/media/posters/vid_20261031_890e4537/p1.jpg Cases in Extreme Environments Put one case in a 65 °C trunk and another on snow at −35 °C, and they will not fail in the same place. Heat softens the gasket and slows its rebound. Cold makes latches and corners brittle. Sunlight chalks whichever face points at the sky. Salt air seizes screws and hinge pins. Dust slips through the paths nothing clamps down, and thermal cycling turns the trapped moisture into droplets on the inside of the lid. No test conditions below, no ratings — just the first part to give way in each environment, the sign you can see, and three things to do on site. https://video.kexincases.com/media/derived/vid_20261031_890e4537/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/zh/videos/extreme-environments/ https://video.kexincases.com/media/posters/vid_20261031_890e4537/p1.jpg 极端环境下的箱子 同一只箱子放进 65 ℃ 的后备厢，和丢在 −35 ℃ 的雪地上，坏掉的地方完全不同。高温先让密封条变软、回弹变慢；低温先让锁扣和四角发脆；紫外先晒坏朝上那一面；盐雾先咬住螺钉和销轴；粉尘从没被压紧的缝隙进去，温变再把水汽凝在壳内。这一篇不给测试条件，也不给等级，只给六种环境各自最先失效的部位、看得见的征兆，和现场立刻能做的三件事。 https://video.kexincases.com/media/derived/vid_20261031_890e4537/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/videos/further-and-further/ https://video.kexincases.com/media/posters/vid_20261031_8ea3abba/p1.jpg Further Out: Carrying Gear in the Field Fifteen kilos over eight hundred metres and thirty-two kilos over twenty-six hundred are not the same task. The first is one trip by one person. The second is two legs, a stop in between, and a grade to account for. Above a quarter of body weight the stride shortens first; above a third, you stop to adjust the shoulder strap every few hundred metres. What follows treats a long carry as arithmetic: load ratio, one-way distance, how grade converts into effort, break rhythm, and the four points that hold the case in a vehicle. https://video.kexincases.com/media/derived/vid_20261031_8ea3abba/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/zh/videos/further-and-further/ https://video.kexincases.com/media/posters/vid_20261031_8ea3abba/p1.jpg 探索更远的地方：户外携带 同样一只箱子，装 15 kg 走 800 m，和装 32 kg 走 2600 m，是两件不同的事。前者一个人一趟能完成，后者要拆成两段、中间歇一次、还得把坡度的账算进去。负重过了体重的 25%，步幅先短，过了 35%，每走一段就要停下来调肩带。这一篇把长途携带算成一本体力账：负重比、单程距离、坡度怎么换算成消耗、休整节律，以及车上的绑扎位置和固定点数。 https://video.kexincases.com/media/derived/vid_20261031_8ea3abba/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/videos/good-looks-strong-protection/ https://video.kexincases.com/media/posters/vid_20261031_f16cc025/p1.jpg Looks and Protection: Balancing Both A case's looks are settled in the tool, not on the drawing. Deeper grain reads as tougher and hides scuffs, but it drags on ejection and traps grit in every groove. Ribs turn a soft lid into a stiff panel and leave a shrink valley on the face you actually look at. Gloss sells the product in a photo and shows every scratch in a van. Here are the four trades — grain, ribs, gloss, coating — and what each costs in tooling days, added weight and rework, before the first sample even ships. https://video.kexincases.com/media/derived/vid_20261031_f16cc025/720p.mp4 9 2026-11-04T08:43:44Z https://cocake.com/zh/videos/good-looks-strong-protection/ https://video.kexincases.com/media/posters/vid_20261031_f16cc025/p1.jpg 颜值与防护：外观和强度的取舍 一只箱子的外观，最后都落在模具和工时上。皮纹深一点，看着更耐脏，可脱模要多让几分斜度，咬花与抛光的工时也跟着涨。加筋能把手感从软塌拉成硬挺，代价是背面留缩痕，喷完漆更容易看见。这一篇不给审美意见，只把纹理、筋位、光泽、表面处理四笔账摊开，说清想要一种好看，结构、重量、成本各要让哪一步，以及哪一项该在开模前就定下来。 https://video.kexincases.com/media/derived/vid_20261031_f16cc025/720p.mp4 9 2026-11-04T08:43:44Z https://cocake.com/videos/how-many-hands/ https://video.kexincases.com/media/posters/vid_20261031_66f4eb47/p1.jpg How Many Hands Does It Take Ask three people how many hands a case needs and you get three answers, usually based on how it felt that one time. Weight settles the count first: under about 15 kg one person can walk it, 22 kg upward is a two-person lift, and past 45 kg a third body buys sightlines rather than strength. Then geometry votes — handle height, stair width, a threshold, a turn at the landing. What follows is a table you can tape to the wall, and the four checks that go with it. https://video.kexincases.com/media/derived/vid_20261031_66f4eb47/720p.mp4 19 2026-11-04T08:43:44Z https://cocake.com/zh/videos/how-many-hands/ https://video.kexincases.com/media/posters/vid_20261031_66f4eb47/p1.jpg 需要多少双手：搬运方式演示 搬一只箱子要几个人，很多人凭手感，现场凭嗓门。真正该先问的是重量落在哪一段：15 kg 以下一个人能抱走，22 kg 以上两个人抬得顺手，45 kg 往上再加人也不是简单相加。人数定了，还要过门、上楼、转身、下放，尺寸和节奏跟不上，三个人照样卡在楼梯口。这一篇给一张能贴墙的分级表，把人数、提手高度、通道净宽和每班次数连起来算。 https://video.kexincases.com/media/derived/vid_20261031_66f4eb47/720p.mp4 19 2026-11-04T08:43:44Z https://cocake.com/videos/medical-case/ https://video.kexincases.com/media/posters/vid_20261031_d65a3833/p1.jpg Medical Case: Zoning and Disinfection What wears a medical case out is not the drop, it is the wipe. Three chlorinated wipes a day harden the gasket inside six months, recovery drops, and moisture starts appearing where the lid meets the shell. Use open-cell foam and the disinfectant soaks in and stays. This page covers what the clip cannot: how fast materials degrade, why the zoning is drawn the way it is, and how to verify it repeatably. https://video.kexincases.com/media/derived/vid_20261031_d65a3833/720p.mp4 25 2026-11-04T08:43:44Z https://cocake.com/zh/videos/medical-case/ https://video.kexincases.com/media/posters/vid_20261031_d65a3833/p1.jpg 医疗器械防护箱：分区与消毒 器械箱最容易被低估的不是抗摔，而是它一年要被擦多少次。每天三次含氯擦拭，密封条在半年内就会变硬、回弹变差，箱内开始出现细小的水汽；内衬用了开孔泡棉，消毒液吸进去出不来，成了污染的载体。这条片子拍的是擦拭动作和分区摆放，这一页说的是片子拍不到的那部分：材料在消毒剂里的衰减速率、分区的物理依据、以及怎么用可复现的方法验证。 https://video.kexincases.com/media/derived/vid_20261031_d65a3833/720p.mp4 25 2026-11-04T08:43:44Z https://cocake.com/videos/photo-gear-case/ https://video.kexincases.com/media/posters/vid_20261031_835c5899/p1.jpg Why Photo Gear Needs Its Own Case Cameras rarely die from one drop. They die from three nights of road vibration, 80% humidity on a coast, and the small displacements left by hurried packing at the end of a shoot. Vibration does not ruin a frame immediately; it backs an M3 screw off half a turn and opens 0.02 mm at the mount. Moisture does not grow mould on contact; it leaves an invisible film inside the element first. https://video.kexincases.com/media/derived/vid_20261031_835c5899/720p.mp4 19 2026-11-04T08:43:44Z https://cocake.com/zh/videos/photo-gear-case/ https://video.kexincases.com/media/posters/vid_20261031_835c5899/p1.jpg 摄影器材需要一个专用的收纳箱 摄影器材很少毁于一次摔。真正让镜头返厂的，是三天两夜的车上振动、海边 80% 的湿度、以及每次收工随手一塞留下的细小位移。振动不会让画面立刻坏，它让 M3 螺丝松半圈、让卡口磨出 0.02 mm 的间隙；潮气也不立刻长霉，它先在镜片内表面留一层看不见的水膜，48 h 后才开始长。专用箱解决的是这两个慢变量。分区只是表象，先要弄清它在防什么。 https://video.kexincases.com/media/derived/vid_20261031_835c5899/720p.mp4 19 2026-11-04T08:43:44Z https://cocake.com/videos/stop-worrying-about-device-protection/ https://video.kexincases.com/media/posters/vid_20261031_90bc0d08/p1.jpg Device Protection: From Worry to Confidence Equipment rarely dies from one dramatic drop. It wears out slowly, from being carried, stacked and left sitting in damp air at the back of a warehouse. Sort a year of repair tickets by cause, and handling impacts plus stack crush usually account for about seventy percent of the total, with vibration, moisture, dust and heat cycling splitting what is left between them. What follows is a cause table and eight checks anyone can run on arrival, done in 600–1200 seconds, then the five places worth a second look once the first season is over. https://video.kexincases.com/media/derived/vid_20261031_90bc0d08/720p.mp4 29 2026-11-04T08:43:44Z https://cocake.com/zh/videos/stop-worrying-about-device-protection/ https://video.kexincases.com/media/posters/vid_20261031_90bc0d08/p1.jpg 设备防护：从担心到放心 设备坏掉，很少是被一次摔坏的，多半是被搬、被压、被潮气泡坏的。把一年的返修单按原因排一遍，装卸跌落和堆码挤压能占到七成上下，剩下三成散在振动、水汽、粉尘和温变里。这一篇不给安慰话，只给一张归因表和八个到场当天就能做的动作：600–1200 秒验完，签收前心里有数，一季之后知道该复查哪几处。 https://video.kexincases.com/media/derived/vid_20261031_90bc0d08/720p.mp4 29 2026-11-04T08:43:44Z https://cocake.com/videos/tool-case-organisation/ https://video.kexincases.com/media/posters/vid_20261031_5cc4e9ed/p1.jpg Tool Case Organisation: Layers and Positions A tool case is a time ledger, not a grid drawing. The screwdriver you reach for 20 times a shift sits on the third tray, so every trip costs a lid lift, two trays shoved aside and a reset. Twenty trips at 15 seconds each totals 300 seconds gone before lunch, repeated every working day. Rank tools by how often your hand goes to them, decide clear height by the tool you touch rather than the tool you own, and the layers mostly arrange themselves. https://video.kexincases.com/media/derived/vid_20261031_5cc4e9ed/720p.mp4 24 2026-11-04T08:43:44Z https://cocake.com/zh/videos/tool-case-organisation/ https://video.kexincases.com/media/posters/vid_20261031_5cc4e9ed/p1.jpg 工具箱收纳：分层与定位 工具箱的分层不是把格子画得好看，而是一笔工时账。一把每班要用二十次的螺丝刀被放进第三层，每次取它都要掀盖、挪开上面两层、再合回去，多花十几秒。这个动作一天重复几十遍，一个月就是几个小时。分层的唯一依据是取用频次：谁被拿得最多，谁就离手最近，尺寸只排第二。 https://video.kexincases.com/media/derived/vid_20261031_5cc4e9ed/720p.mp4 24 2026-11-04T08:43:44Z https://cocake.com/videos/a-case-that-lasts/ https://video.kexincases.com/media/posters/vid_20261031_54b84d33/p1.jpg Building a Case That Lasts Most cases are scrapped at a joint, not at the shell. Three joints do the damage: the hinge pin that turns lid and base into one axis, the latch that gets snapped shut dozens of times a day, and the handle root that funnels the weight of a loaded case into a patch of plastic. Each one announces itself before it fails, and each can be pinned down at the drawing stage with a clearance, a torque figure and a wall section. Settled once on paper, those three numbers carry the case through years of loading. https://video.kexincases.com/media/derived/vid_20261031_54b84d33/720p.mp4 28 2026-11-04T08:43:44Z https://cocake.com/zh/videos/a-case-that-lasts/ https://video.kexincases.com/media/posters/vid_20261031_54b84d33/p1.jpg 做一只能用很久的箱子 一只箱子报废，很少是壳体先坏。先出问题的是三个接口：铰链销把盖和底连成一条轴，锁扣每天被扣开几十次，提手根部把整箱重量收进一小块塑料。这三处的失效都能提前看出来，也都能在设计阶段用间隙、扭矩和壁厚定死。壳体只要不裂，箱子就还有用；接口一松，整只箱子就只剩下一个储物盒的功能。 https://video.kexincases.com/media/derived/vid_20261031_54b84d33/720p.mp4 28 2026-11-04T08:43:44Z https://cocake.com/videos/affordable-case-20-usd/ https://video.kexincases.com/media/posters/vid_20261031_870114fc/p1.jpg A Protective Case at the Twenty-Dollar Level Twenty dollars buys a fixed cost structure, not a discount. Resin takes 35% to 45% of it, hardware and tooling amortisation take their share, and moulding, assembly, packaging and margin divide the rest. Push one line item and another gives way. What this tier delivers is a straight shell, a workable wall and a lid that closes; what it gives up is thick walls, good hardware and dense foam. Knowing which three items were trimmed, and by how much, is the only way to judge what the price actually bought. https://video.kexincases.com/media/derived/vid_20261031_870114fc/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/zh/videos/affordable-case-20-usd/ https://video.kexincases.com/media/posters/vid_20261031_870114fc/p1.jpg 二十美元级别的防护箱 二十美元这个价位，成本结构基本是定死的：原料占 35% 到 45%，五金件和模具摊销各占一块，剩下的才是成型、装配、包装和利润。每一块往里挤一点，另一块就得让出来。这一档能拿到的是规整的壳体、够用的壁厚和一个能顺畅开合的盖；必须放弃的是厚壁、好五金和高密度内衬。看懂这张表，才知道哪些地方不能让。 https://video.kexincases.com/media/derived/vid_20261031_870114fc/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/videos/built-to-protect-fitted-to-shape/ https://video.kexincases.com/media/posters/vid_20261031_b0a65f61/p1.jpg Built to Protect, Fitted to Shape A case is two mechanisms working against each other. The shell buys time by bending two to four millimetres and springing back; the liner spends that time by holding the object inside a 20–35% compression band so it barely accelerates. Get the pairing wrong and one half does all the work until it gives out. What follows is the arithmetic that decides which half fails first: deflection budget, liner thickness, and the one to two millimetres of clearance. The figures below are typical ranges from production, not guarantees, but they are the numbers worth designing against. https://video.kexincases.com/media/derived/vid_20261031_b0a65f61/720p.mp4 19 2026-11-04T08:43:44Z https://cocake.com/zh/videos/built-to-protect-fitted-to-shape/ https://video.kexincases.com/media/posters/vid_20261031_b0a65f61/p1.jpg 为防护而生，为贴合而造 同一个箱体，外壳和内衬做的是两件事，却必须同时成立。外壳把落地的冲击摊到更大的面积上，靠 2–4 mm 的弹性形变争取时间；内衬把这段位移限死在 20–35% 的压缩区间里，让物件在腔内几乎没有加速的机会。两者之间留 1–2 mm 间隙，再配上 15–25 mm 的衬厚，才是一组能互相接住的参数。任何一侧单独加强，另一侧都会先到极限。 https://video.kexincases.com/media/derived/vid_20261031_b0a65f61/720p.mp4 19 2026-11-04T08:43:44Z https://cocake.com/videos/case-lineup/ https://video.kexincases.com/media/posters/vid_20261031_93d62bf4/p1.jpg A Few Cases Worth Looking At Most case searches begin on the outside, with a tape measure and a weight. The inside is what actually decides whether your gear fits, and working outward from the cavity turns the whole choice into subtraction. Once the outer-to-inner volume ratio is known, every point above 1.0 has an explanation: wall, radii, ribs, hardware seats. Three variables then move the answer at any given size tier, and none of them is lid depth, latch type or handle style. Get those right first and the shortlist usually collapses to two candidates. https://video.kexincases.com/media/derived/vid_20261031_93d62bf4/720p.mp4 21 2026-11-04T08:43:44Z https://cocake.com/zh/videos/case-lineup/ https://video.kexincases.com/media/posters/vid_20261031_93d62bf4/p1.jpg 几款值得看的防护箱 挑选箱体常从外廓开始，量的是长宽高和重量；真正决定装不装得下的，是内腔。先定内腔三向净空，再让外廓去迁就它，选型就变成一道减法：外廓与内腔的体积比落在 1.4–1.7，多出来的那部分就是壁厚、圆角、筋位和五金件座占掉的体积。同一档位里还有三个变量会改写结论，它们与盖深、锁扣、把手无关。 https://video.kexincases.com/media/derived/vid_20261031_93d62bf4/720p.mp4 21 2026-11-04T08:43:44Z https://cocake.com/videos/case-switch/ https://video.kexincases.com/media/posters/vid_20261031_c2d19fad/p1.jpg Case Switch: A Fast Cut Between Models Fifteen seconds, four cases, a dozen cuts. What holds this kind of edit together is not the footage, it is whether the eye keeps landing on the same coordinate. Pick one pin or one handle corner on each case, lock its position in frame, and cut on the frame where it arrives there. Hold cards 1.2–1.8 s, keep shots at 0.4–0.8 s, get the first case on screen inside 0.3 s, and four models fit without turning into noise. The rest is bookkeeping: frame numbers, pixel offsets, one line per card. https://video.kexincases.com/media/derived/vid_20261031_c2d19fad/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/zh/videos/case-switch/ https://video.kexincases.com/media/posters/vid_20261031_c2d19fad/p1.jpg 一秒钟切换：箱型对比剪辑 15 秒、四个箱型、十几个切换点，这类片子的成败不在画面好看，而在观众的眼睛有没有被同一个位置接住。做法是把每只箱体上的一颗销子或一个把手转角当作锚点，让它在画面里的坐标固定不变，切点落在同一帧的同一像素上。参数卡停留 1.2–1.8 s，单镜 0.4–0.8 s，首帧 0.3 s 内出箱，这三条定完，15 秒才装得下四个箱型而不乱。 https://video.kexincases.com/media/derived/vid_20261031_c2d19fad/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/videos/case-transition/ https://video.kexincases.com/media/posters/vid_20261031_937fa041/p1.jpg Shape Shift: Scene Into Case A shape-match cut is a swap, not an effect. The eye buys it when three measurements agree: two silhouettes sit within a few percent of each other, the subject keeps travelling in the same direction at a similar rate, and both shots read as lit by one lamp. Break any one of the three and the transition looks pasted on, however much effort went into the edit. What follows are the tolerances we check before a single frame is cut, and the ones that tell us a shot should never reach the timeline. https://video.kexincases.com/media/derived/vid_20261031_937fa041/720p.mp4 10 2026-11-04T08:43:44Z https://cocake.com/zh/videos/case-transition/ https://video.kexincases.com/media/posters/vid_20261031_937fa041/p1.jpg 形态转换：从场景到箱体 转场能不能成立，不靠灵感，靠三个量同时对上：轮廓像不像、速度接不接、颜色是不是同一盏灯打的。三者对上，0.3 秒的叠化就够观众自己补完；差一项，再长的特效也像贴上去的。下面把这三种量拆成可以复盘的容差，拍之前先量，剪的时候才有得选，也才知道哪一条素材根本不该进时间线。先定判据，再开机，比事后修补便宜得多。 https://video.kexincases.com/media/derived/vid_20261031_937fa041/720p.mp4 10 2026-11-04T08:43:44Z https://cocake.com/videos/custom-case-brand-value/ https://video.kexincases.com/media/posters/vid_20261031_908a2a88/p1.jpg Fully Custom Cases: Putting the Brand Into the Product The same logo applied three ways has three different lifespans, and the difference is not in the artwork. Surface printing is cheap, fast to set up and fades wherever a hand lands. An in-mould label costs more, slows the tool, and outlives the shell it sits in. What separates the three is the operation the mark has to survive — the press, the fixture, the cavity — plus the tolerances a caliper and a spectrophotometer can settle and a purchase order can carry. Choose the process before the logo, and the rest of the specification follows. https://video.kexincases.com/media/derived/vid_20261031_908a2a88/720p.mp4 32 2026-11-04T08:43:44Z https://cocake.com/zh/videos/custom-case-brand-value/ https://video.kexincases.com/media/posters/vid_20261031_908a2a88/p1.jpg 全定制防护箱：把品牌做进产品 同一个标志，印在箱体表面、印在夹具上、做进模具里，是三种寿命。表面印刷便宜、上机快，磨几次就淡；模内标签贵、改模慢，却和箱体同寿。品牌化定制的核心判断不在图案好不好看，而在标识落在哪道工序上，以及位置公差、线宽、色差这些能被卡尺和色差仪量出来、也能直接写进验收条款里的硬指标。 https://video.kexincases.com/media/derived/vid_20261031_908a2a88/720p.mp4 32 2026-11-04T08:43:44Z https://cocake.com/videos/everything-worth-guarding/ https://video.kexincases.com/media/posters/vid_20261031_4d327b57/p1.jpg Guarding What Is Worth Keeping Guarding is an abstract word until it turns into a shot list: which scenes to shoot, how long each one holds, how much of the frame the subject takes, and where subtitles are allowed to sit. The point of a written spec is that footage shot by different people, in different cities, in different seasons, still cuts together without a meeting in between. One line of feeling, then nothing but numbers that can be checked on location and enforced at the edit. The method is simple: specify the numbers first, then shoot to them. https://video.kexincases.com/media/derived/vid_20261031_4d327b57/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/zh/videos/everything-worth-guarding/ https://video.kexincases.com/media/posters/vid_20261031_4d327b57/p1.jpg 守护，皆为重要之物 守护是个抽象词，落到片子上必须变成清单：拍哪几个场景、每个镜头几秒、主体占画面多少、字幕压在哪条线上。这套规范的作用是让不同的摄影师、不同的城市、不同的季节拍出来的素材，能剪进同一条片子。情绪留一句就够，其余全是能被检查、能被追责的参数，拍摄前发下去，剪辑时才有统一的底。 https://video.kexincases.com/media/derived/vid_20261031_4d327b57/720p.mp4 13 2026-11-04T08:43:44Z https://cocake.com/videos/factory-introduction/ https://video.kexincases.com/media/posters/vid_20261031_ea11a079/p1.jpg Factory Introduction: What We Make and How A factory tour video shows aisles, machines and tidy racks. Anyone can walk a plant and leave impressed. The useful question is narrower: at which station would a bad part be stopped, and who signs off when it is. That answer lives in seven process stations and four quality gates, and both can be audited in roughly ninety minutes. Below is the route worth walking, two or three checks per stop, and the numbers that turn an impression into a verdict. Skip the lobby display; ask for the drier log and the first-article board. https://video.kexincases.com/media/derived/vid_20261031_ea11a079/720p.mp4 35 2026-11-04T08:43:44Z https://cocake.com/zh/videos/factory-introduction/ https://video.kexincases.com/media/posters/vid_20261031_ea11a079/p1.jpg 工厂介绍：我们做什么、怎么做 参观片能拍到走廊、机台和整齐的货架，拍不到的是判定权在谁手里。看一家箱体厂，按七节点工序链走一遍，再在四个质量节点各停一次，基本能判断它能不能稳定交货：料有没有干燥记录、模温是不是一台对一台、首件板有没有签字、巡检有没有按点取样。下面这条动线按 90 分钟排，每站只看两三样东西，看完都能落到数字上。 https://video.kexincases.com/media/derived/vid_20261031_ea11a079/720p.mp4 35 2026-11-04T08:43:44Z https://cocake.com/videos/new-case-launch/ https://video.kexincases.com/media/posters/vid_20261031_3561990d/p1.jpg New Case Launch: First Look The usual mistake with a launch film is treating fifteen seconds as a compressed datasheet. A vertical viewer gives you three layers of attention in order: does the shape read, where would this thing be opened, and only then, why should I believe it. Each layer has its own shot grammar, its own time budget, and its own way of failing. What follows splits those layers into a shot list, then a release matrix from T−7 to T+3, and explains why this edit carries no numbers at all. https://video.kexincases.com/media/derived/vid_20261031_3561990d/720p.mp4 20 2026-11-04T08:43:44Z https://cocake.com/zh/videos/new-case-launch/ https://video.kexincases.com/media/posters/vid_20261031_3561990d/p1.jpg 新品发布：箱体亮相 发布片最容易犯的错，是把十五秒当成产品说明书的压缩版。竖屏观众只给三层注意力：先看形状对不对，再看这东西在什么场景里被打开，最后才想知道凭什么信。三层各有各的镜头语法与时长预算，也各有各的失败方式。下面把三层拆成可执行的镜头清单，再给一套从 T−7 到 T+3 的素材矩阵，并说明这一版为什么一个参数都不报。 https://video.kexincases.com/media/derived/vid_20261031_3561990d/720p.mp4 20 2026-11-04T08:43:44Z https://cocake.com/videos/oem-odm-case-partner/ https://video.kexincases.com/media/posters/vid_20261031_1c28bedb/p1.jpg Looking for an OEM/ODM Case Partner? The supplier that answers your RFQ fastest is rarely the one worth signing. Between first enquiry and mass production there are six stages, and each one has a defined deliverable and an acceptance test. Where the test is vague, every later stage degrades into a verbal promise. This walks the chain from a buyer's side: what belongs in the RFQ pack, what sampling really proves, why tooling ownership must be settled before T1, how first article and ramp-up are gated, and how two rounds of screening remove the wrong partner early instead of three months into production. https://video.kexincases.com/media/derived/vid_20261031_1c28bedb/720p.mp4 10 2026-11-04T08:43:44Z https://cocake.com/zh/videos/oem-odm-case-partner/ https://video.kexincases.com/media/posters/vid_20261031_1c28bedb/p1.jpg 在找 OEM/ODM 箱体合作伙伴？ 询价邮件发出去，回得最快的那家往往不是最合适的。从询价到量产有六个节点，每个节点都有明确的交付物和验收判据；判据不清，后面每一步都会退化成口头承诺。下面按采购视角排一遍：RFQ 包里放什么、打样到底验证什么、T1 之前为什么必须谈定模具归属、首件与爬坡怎么卡，以及怎么用两轮把不合适的供应商筛掉，而不是等到量产三个月后才发现。 https://video.kexincases.com/media/derived/vid_20261031_1c28bedb/720p.mp4 10 2026-11-04T08:43:44Z https://cocake.com/videos/protect-product-elevate-brand/ https://video.kexincases.com/media/posters/vid_20261031_100e0d35/p1.jpg Protect the Product, Lift the Brand Most teams keep two costs in separate places: the carton invoice, and the credits issued for goods that arrived cracked. Merge them onto one page and the question stops being philosophical. It becomes arithmetic — how many points of packaging spend buy back how many points of damage. What follows is that worksheet, from the figures that go in to the unboxing sequence and the three lines worth printing on a purchase order. None of it needs a redesign; most of the movement comes from four decisions taken before the first sample is cut. https://video.kexincases.com/media/derived/vid_20261031_100e0d35/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/zh/videos/protect-product-elevate-brand/ https://video.kexincases.com/media/posters/vid_20261031_100e0d35/p1.jpg 保护产品，也提升品牌 包装预算常被拆成两笔分开记的支出：一笔是箱子本身，一笔是运输途中碎掉的那几件。把两笔并到同一张表上，问题就变成一个可以算出来的对冲点——包装成本占货值抬到几个百分点，破损率才落到可接受的那一档。这篇只讲这张表怎么列、每一项用什么量、开箱动线怎么数步骤。 https://video.kexincases.com/media/derived/vid_20261031_100e0d35/720p.mp4 18 2026-11-04T08:43:44Z https://cocake.com/videos/quick-cut-case/ https://video.kexincases.com/media/posters/vid_20261031_703c5521/p1.jpg Quick Cut: The Case Appears A twelve-second case film holds maybe twenty shots, and everything depends on whether the cuts sit on the beat. Start with tempo: pick something between 120 and 140 BPM, which works out to one beat every 0.43 to 0.50 seconds, so a 12.4-second timeline carries roughly 25 to 29 beats. Sixteen to 24 cuts go on the strong ones and the weak ones stay empty. Shots run 6 to 14 frames, every cut lands within a frame, and the cover frame comes from the 0.4 to 0.8 second window. None of these numbers is discovered afterwards; all of them are decided before the first clip is dragged in. https://video.kexincases.com/media/derived/vid_20261031_703c5521/720p.mp4 12 2026-11-04T08:43:44Z https://cocake.com/zh/videos/quick-cut-case/ https://video.kexincases.com/media/posters/vid_20261031_703c5521/p1.jpg 闪现剪辑：箱体快切 12.4 秒的箱体快切，画面不过二十来个镜头，成败全在切点是否落在拍上。做法是先定曲速：120–140 BPM 之间选一个，每拍就是 0.43–0.50 秒，整条片约 25–29 拍；再把 16–24 个切点分到强拍，弱拍留空，相邻两镜景别至少跳 2 档。单镜 6–14 帧，切点误差压在 1 帧以内，封面帧取 0.4–0.8 秒处，导出给 12–20 Mbps。四条定完，节奏按表排，不必靠手感一遍遍试。这套数按 25 fps 记，换帧率要重算。 https://video.kexincases.com/media/derived/vid_20261031_703c5521/720p.mp4 12 2026-11-04T08:43:44Z https://cocake.com/videos/snap-case-reveal/ https://video.kexincases.com/media/posters/vid_20261031_16cf0516/p1.jpg Snap: A Transition-Led Creative Cut Fourteen and a half seconds, one visual change, three sonic events: the snap, the material answering it, and the room letting go. Record the snap yourself at 48 kHz / 24 bit in several passes, hold picture and sound inside two frames — 0.08 seconds at 25 fps — then master to −14 LUFS with peaks capped at −1 dBTP and 6 to 9 dB of headroom for the transition hit. Hand, material and room each own a slice of the spectrum, and if any one of them climbs over the others the illusion dies. The image only lands if the sound arrives first. https://video.kexincases.com/media/derived/vid_20261031_16cf0516/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/zh/videos/snap-case-reveal/ https://video.kexincases.com/media/posters/vid_20261031_16cf0516/p1.jpg 响指一变：创意转场短片 一条 14.5 秒的转场短片，画面只变一次，声音却要变三次：手上的响指、箱子材质的回应、房间的余响。做法是响指单独取样，48 kHz / 24 bit 录 3 层，声画同步误差压在 2 帧（0.08 秒）以内，混响衰减定 0.8–1.5 秒，整体响度 −14 LUFS、峰值不超过 −1 dBTP，转场音效留 6–9 dB 余量。三层各管一段频谱，任何一层反超，响指立刻变假。整条只有 1 次转场，14.5 秒的声音却要提前铺满。 https://video.kexincases.com/media/derived/vid_20261031_16cf0516/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/videos/swipe-reveal-case/ https://video.kexincases.com/media/posters/vid_20261031_7d918b00/p1.jpg Swipe to Reveal: Built for Vertical Feeds Before a vertical film goes anywhere, count what the interface will eat. Inside a 1080 by 1920 frame the top strip takes 12–18% of screen height and the bottom takes 20–28%, leaving roughly the middle 54–68% untouched. Swipe travel runs 60–80% of screen height, the gesture finishes in 0.35–0.6 seconds, the piece runs 10.4 seconds, and the opening frame carries two elements at most. Three-second retention of 45–65% is the bar. Every figure here is blocked for before the camera is set; applied afterwards it doubles the cost and the cleanup. https://video.kexincases.com/media/derived/vid_20261031_7d918b00/720p.mp4 10 2026-11-04T08:43:44Z https://cocake.com/zh/videos/swipe-reveal-case/ https://video.kexincases.com/media/posters/vid_20261031_7d918b00/p1.jpg 划动出现：交互式呈现 竖屏片子在开拍前就要算遮挡：1080×1920 的画布里，上方被压掉 12–18%、下方被压掉 20–28%，真正干净的只剩中间 54–68% 这一条带。滑动位移取 60–80% 屏高，手势 0.35–0.6 秒走完，整条 10.4 秒，首帧只放 2 个信息元素，3 秒留存做到 45–65% 才算过关。先量屏、再定机位、最后排信息：拍完才挪主体，重排成本要翻 2 倍，被平台 UI 挡掉的信息也补不回来，只能重拍；这套数换机型要重测。 https://video.kexincases.com/media/derived/vid_20261031_7d918b00/720p.mp4 10 2026-11-04T08:43:44Z https://cocake.com/videos/tools-deserve-better/ https://video.kexincases.com/media/posters/vid_20261031_138acf7d/p1.jpg Your Tools Deserve Better Nobody counts how often they hunt for a tool. The figure is usually 8 to 15 times a day, at 30 to 120 seconds each, which compounds into 20 to 60 hours a year — close to a week and a half of paid time spent opening drawers and asking around. No sentiment is needed to justify a better box. Three numbers will do: how often, how long, how far to the next replacement. The arithmetic is deliberately crude, and it survives contact with a real bench because every input can be timed with a stopwatch instead of argued about. https://video.kexincases.com/media/derived/vid_20261031_138acf7d/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/zh/videos/tools-deserve-better/ https://video.kexincases.com/media/posters/vid_20261031_138acf7d/p1.jpg 你的工具值得更好的保护 一天里到底找过几次工具，很少有人数过。8 到 15 次是常见区间，每次 30 到 120 秒，乘起来一年就是 20 到 60 小时，接近一周半的净工作时间，全花在翻箱子和问同事上。这笔账不需要情怀支撑，只要三个数：一天找几次、每次多久、丢一件多久补回来。算式故意做得粗，好处是每个输入都能用秒表量出来，不必开会讨论。 https://video.kexincases.com/media/derived/vid_20261031_138acf7d/720p.mp4 14 2026-11-04T08:43:44Z https://cocake.com/videos/what-matters-stays-guarded/ https://video.kexincases.com/media/posters/vid_20261031_cdfb938e/p1.jpg What Matters Stays Guarded Some objects can be replaced by Tuesday. Others cannot be replaced at all, and the difference has nothing to do with price. It comes down to three things you can actually score: what it costs to obtain again, whether a second one exists, and what the current shelf exposes it to. Rate each from 1 to 5, add them up, and the total decides between a hard case, a soft bag, or a drawer with a dust cover. Cost never enters the score directly; what enters is the cost of the gap it would leave. https://video.kexincases.com/media/derived/vid_20261031_cdfb938e/720p.mp4 15 2026-11-04T08:43:44Z https://cocake.com/zh/videos/what-matters-stays-guarded/ https://video.kexincases.com/media/posters/vid_20261031_cdfb938e/p1.jpg 重要之物，始终被守护 有些东西坏了可以再买一只，有些东西坏了就永远少一件。区别不在价格，而在三件事能不能被量出来：重新获得它要付出多少、有没有可以顶上的第二件、摆在当前这个位置会受什么。三件事各打 1 到 5 分，加总落在哪个区间，就决定了它进硬箱、进软包，还是留在抽屉里加一只防尘袋。 https://video.kexincases.com/media/derived/vid_20261031_cdfb938e/720p.mp4 15 2026-11-04T08:43:44Z