Why is the frame clear height 12 mm?

A: It is derived back from foam rebound. The Medical portable infusion pump safety case needs enough overlap to press the insert top without holding the lid off its seat and stopping the two catches.

Are pump displacement and frame sink the same reading?

A: Displacement asks how far the pump moved sideways in a 1.0 m drop; frame sink asks how much clear height is left after 4000 cycles. The Medical portable infusion pump safety case keeps them in separate columns.

How is the 0.6 mm groove clearance re-checked?

A: With the frame closed, a feeler gauge runs along each of the four segments and readings are logged to 0.05 mm. A single segment out of tolerance waits until the four-way spread has been compared with 0.1 mm.

How is IP65 used in this article?

A: Only as a sequence of test moves: spray duration and dust cycling are borrowed to record what the rim does. The report issues no class and claims no pass.

Medical portable infusion pump safety case

Quick answer: The Medical portable infusion pump safety case pairs a 12 mm lid frame with 0.6 mm groove clearance to hold pump shift within 0.8 mm.

Shell moulding and wall-thickness control
Lid frame clear height and moulding tolerance
Bottom limiting groove clearance and insert assembly
Closing system and seal compression
Release testing and batch acceptance
FAQ

1. Shell moulding and wall-thickness control

The Medical portable infusion pump safety case is moulded to a 520×380×210 mm outer envelope and a 455×320×150 mm cavity, with the wall fixed at 3.8 mm. That thickness sets the whole injection window: shear rate at the corners, hold pressure and cooling layout all follow it. If any patch drops below 3.4 mm, the side wall sinks after ejection and the rim line drifts out of register. Stiffness has to come from even wall stock.

Empty weight is the cheapest check: one shell is weighed every two hours, and a reading more than 0.15 kg from 4.5 kg stops the press.

The 9 kg loaded figure is the service load, carried on the four side walls and the bottom ribs, never on the rim, which stays clear as a sealing face. Ribs run in a grid 6 mm tall with 1.5 mm root fillets, so stress spreads instead of cracking. Stock around each moulded insert is thickened to 4.2 mm, since metal and plastic shrink at different rates. Shells rest 24 h at 23 °C before assembly, so a dimension taken then does not change two days later.

2. Lid frame clear height and moulding tolerance

A rib moulded along the inner rim forms the press frame. Its clear height is set at 12 mm, and on closing it alone provides the vertical constraint that pushes the insert back into the bottom groove. Cavity depth governs that height, and shrinkage removes 0.1–0.2 mm, so the tool is cut to 12.18 mm with the allowance left in the steel.

The Medical portable infusion pump safety case gauges this at first inspection: a depth gauge at four points on the frame, with 11.95–12.05 mm accepted.

Frame setting	Measured clear height	Closing verdict
11.8 mm setting	11.75–11.85 mm	Insert top not pressed
12.0 mm setting	11.95–12.05 mm	Lid seats correctly
12.2 mm setting	12.15–12.25 mm	Rim bottoms out, catch travel short

Too little height leaves a gap above the insert and hands the vertical job to the foam. Too much and the lid stalls: the two catches cannot finish their travel and the seal never reaches 21% compression. The frame starts the chain; every reading downstream moves with it.

3. Bottom limiting groove clearance and insert assembly

The bottom insert carries a limiting groove around its outer edge, held at 0.6 mm per side. That groove is what pins the insert horizontally inside the Medical portable infusion pump safety case. Open it to 0.9 mm and lateral movement in a drop pushes pump displacement past 0.8 mm; close it below 0.4 mm and ordinary shrinkage variation stops the insert entering the shell at all.

Medical portable infusion pump safety case olive open shell on steel bench, translucent grey lid panel, kraft sleeve and small module, warehouse racking behind

The 0.6 mm figure covers tolerance and foam rebound. Groove-mouth draft is held at 0.5° with flare under 0.05 mm; at 1° the mouth opens out and a gauge reads the mouth rather than the wall.

Four groove segments run along the four sides and must agree. Fitters on the Medical portable infusion pump safety case pass a feeler gauge along each segment and log to 0.05 mm, entering the four readings and the frame height on one assembly sheet signed per segment. A single segment out of tolerance is not sent back alone; the spread across all four is read first.

4. Closing system and seal compression

Two catches close the lid of the Medical portable infusion pump safety case, each rated at 340 N. Past 21% compression the seal cannot recover, and after a few dozen cycles the bead takes a permanent set. Catch travel is tied to frame height: 0.2 mm extra shortens the stroke, so the force reading looks high while the load reaching the seal is low.

One seal sits in a rim groove sized back from cord diameter and a 21% target. Below 18% the bead does not sit down on the rim; above 25% stress relaxation sets in and the bead stops springing back. After assembly every shell has its rim gap checked with a 0.05 mm feeler that must not enter.

Medical portable infusion pump safety case three small open shells in a row, red driver bits in the middle, orange tools at right

Spray and dust are run through the IP65 sequence of moves and nothing more. The Medical portable infusion pump safety case reports whether water entered the rim and whether dust settled inside; the report carries no rating class and no certificate number. Sampling covers the rim, the frame and the insert.

5. Release testing and batch acceptance

Drop testing on the Medical portable infusion pump safety case runs from 1.0 m onto six faces — bottom, top, both long edges, both short edges. A sample is closed with a 9 kg payload and both catches engaged, then pump movement is read against a scribed floor baseline.

Drop orientation	Drop height	Pump-body displacement
Broad face (bottom)	1.0 m	≤0.8 mm
Broad face (lid)	1.0 m	≤0.8 mm
Long edge one	1.0 m	≤0.8 mm
Long edge two	1.0 m	≤0.8 mm
Short edge one	1.0 m	≤0.8 mm
Short edge two	1.0 m	≤0.8 mm

Endurance on the Medical portable infusion pump safety case runs 4000 cycles on a rig that lifts the lid to a fixed angle and releases it, pausing every 500 for a frame-height reading. One question closes the test: has frame sink passed 0.3 mm? The number measures how much limit margin the 12 mm height still holds, not collapse.

Displacement value	Accumulated cycles	Disposition
0.10 mm	4000 cycles	Release
0.20 mm	4000 cycles	Release
0.30 mm	4000 cycles	Boundary release
0.34 mm	4000 cycles	Re-check
0.40 mm	4000 cycles	Reject

Batch release reads the spread of the four groove clearances in one shell rather than any single unit. A spread past 0.1 mm sends the tool back for rework: cavities cool at different rates and uneven shrinkage splits the load between segments. Sampling re-measures the outer envelope and cavity, confirms the 3.8 mm wall has not thinned, and logs the 4.5 kg empty weight. JUNZHIJIA prints segment number, clearance and frame height side by side, so a deviation can be traced to one tool.

Conclusion

The Medical portable infusion pump safety case splits acceptance into three stages. Moulding watches 3.8 mm of wall and 4.5 kg of empty weight; assembly watches 12 mm of frame height and 0.6 mm of groove clearance; release watches 0.8 mm of pump displacement after a 1.0 m drop and 0.3 mm of frame sink after 4000 cycles. Each stage leaves a reading that can be taken again.