Does a protective plastic case supplier always list the mould fee?

Answer: Some do, some bury it in the unit price. Either works if the contract names the tool owner and the repeat-order rule; without that, expect a second charge.

Will a protective plastic case supplier take 200 pieces?

Answer: Usually yes, at index 100, mould charged in full, 26 days. Take a public mould and change only colour and insert.

What resin grade suits -25 °C?

Answer: Name the grade and cap regrind at 10%. Heavy-regrind parts crack at the latch seat and hinge, so ask for a cold drop record.

Can 38 days be squeezed to 25?

Answer: Only the parallel steps: mould making and hardware sampling together, the insert die cut before trial moulding. Moulding and salt spray, about 20 days, will not move.

How much does a 60-day term add?

Answer: Typically 3% to 6%, near 13,000 RMB on 2,000 pieces. If cash flow allows, 30 days with a 30% deposit beats it.

How do I spot a low-grade quote?

Answer: Ask for resin grade, regrind ratio, plating spec and salt spray hours in a written annex, then a recent test report on that grade.

Protective plastic case supplier: cold store to port in 11 days

Quick answer: Split a protective plastic case supplier quote into body, hardware, insert, packing and mould; tiers of 200, 800 and 2,000 pieces spread a 52,000 RMB mould to 26 RMB per unit; lead time runs 38 days from the approved sample.

Six lines that must be locked in the RFQ
MOQ and mould ownership: spreading three tiers
Working back from the 11-day window
Payment terms, deposits and four quoting traps
Supply continuity: safety stock and a second part number
FAQ

1. Six lines that must be locked in the RFQ

A cold-chain line sits at -25 °C for three days, runs 1,100 km and loads at the port inside eleven days. The case is 760 × 520 × 380 mm, 6.4 kg, 2,000 pieces; three protective plastic case supplier quotes came in at 214 to 268 RMB.

Lock six lines and quotes become comparable: tolerance, walls, resin grade, plating hours, unit weight, delivery terms. Skip one and you buy an argument.

RFQ line	How specific	If missing
Outer and inner size	Both sets, ±1.5 mm	Loose mould, gaps at assembly
Wall and ribs	Base, lid, walls apart	Thin wall, sample 400 g light
Resin and regrind	Grade named, 10% cap	Latch seat cracks in cold
Hardware	Four parts, 480 h salt spray	Cheap plating, seized in months
Weight and packing	6.4 kg, five-ply carton	Pallet count wrong
Delivery terms	Port named, cost split	Trucking billed later

2. MOQ and mould ownership: spreading three tiers

MOQ follows the press, the cavitation and the colour change. A 760 mm case runs two cavities on an 800-tonne machine at 96 seconds, about 1,500 pieces a day; below that, the 90-minute colour purge and 4% scrap never amortise.

Protective plastic case supplier: black cases stacked six high on pallets, two latches out, orange racking behind

Three tiers are usual; the mould fee, not the resin, separates them.

Volume tier	Price index	Mould fee	From approved sample
200 pcs	100	Charged in full	26 days
800 pcs	94	Half amortised	31 days
2,000 pcs	87	Fully amortised, 26 RMB each	38 days

A protective plastic case supplier spreading 52,000 RMB over 2,000 pieces puts 26 RMB on each unit; over 200 pieces, 260 RMB, more than the case itself.

Mould ownership needs a clause: title to the buyer, no charge on repeats, 8,000 RMB modification cap, five years of storage.

3. Working back from the 11-day window

The eleven days are transport, not production; manufacturing closes first.

Day 11: loading at the port, cases at the yard by 08:00, seal and count checked
Day 9: devanning, pallets and carton damage checked, past 2% photographed
Day 6: ex-works, 32 units pulled, 500 latch cycles
Day 3: inspection closed, 480 h salt spray and cold drop record filed
Day 1: masterbatch, plated hardware and insert die on site

Three items carry the risk. Masterbatch takes 4 days by courier and 7 by freight, and a custom colour spends those 7 days out of mould-making time. Hardware queues 12 days for a 480 h salt spray batch, slower than the body. The insert die is the one nobody raises. EVA takes 6 days to cut and 3 more to approve. If it surfaces only when cases come off the machine, the order waits 9 extra days. Any item slipping 5 days turns eleven days into sixteen.

Count delivery from the approved sample, never from the deposit.

4. Payment terms, deposits and four quoting traps

Payment rewrites a protective plastic case supplier's price. This order ran 30% deposit, 60% before shipment and 10% at thirty days; pushed to 15%, suppliers quote 3 to 5 RMB higher, because they finance the resin.

Protective plastic case supplier: grey case open on a wooden bench, grey tray and black foam, wrenches and cable beside

All four traps look ordinary on paper. They surface line by line.

Trap	On the quote	What to check
Mould fee twice	Repeat order bills tooling	Title clause, no repeat charge
Regrind unstated	"HDPE", no ratio	Grade plus written cap
Hardware by the set	"Set, 38 RMB"	Latch, hinge, handle, valve split
Vague freight	Incoterms blank	Named term and cost split

Resin moves weekly; 21 days is the usual lock, longer validity hides a price clause.

5. Supply continuity: safety stock and a second part number

Once the pieces ship, the line is not yours. Ask which workshop stores the mould, how many hardware suppliers are approved, how fast a shortage closes.

Hold safety stock at 12%, about 240 units, in the supplier's warehouse. Qualify one alternate part number: colour and insert may change, body dimensions and latch positions may not, so a switch needs no new fixtures.

Conclusion

Most of the gap between protective plastic case supplier quotes sits in the RFQ, not on the shop floor. Fix the six lines, spread the mould fee and pin the milestones. Negotiate terms and stock clauses together, because price alone buys a downgraded grade. Choosing a protective plastic case supplier means choosing one that opens its cost structure.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.