SIM Tray Manufacturing: MIM vs Stamping Comparison
SIM Tray Types
SIM tray manufacturing produces standard, nano+micro dual and simple card trays. Stainless steel 304 for strength and corrosion resistance. MIM for complex shapes, stamping for simpler designs. Eject mechanism: push-push with spring lever.
Card detection switch integration for tray presence sensing. Tray thickness 0.4-0.6mm typical.
| Type | Material | Process | Key Feature |
|---|---|---|---|
| Standard Tray | SS 304 | MIM | Card push mechanism |
| Nano+Micro | SS 304 | MIM | Dual card slot |
| Simple Tray | SS 304 | Stamping | Formed tabs |
| Eject Assembly | Steel/plastic | Assembly | Push-push lever |
MIM vs Stamping
MIM produces complex 3D ejection features in one operation. Stamping with bending needs progressive die (8-12 stations). MIM: complex shapes, no secondary assembly. Stamping: lower unit cost at volume. Crossover approximately 100,000 units/year.
Surface finish: MIM Ra 1.6-3.2, stamped Ra 0.8-1.6 with polished dies.
| Parameter | MIM | Stamping |
|---|---|---|
| Geometry | Complex 3D | 2D+forming |
| Tooling | $7-15k | $5-20k |
| Volume Economy | 10,000+ | 50,000+ |
| Surface | Ra 1.6-3.2 | Ra 0.8-1.6 |
Quality and Fit
Go/NoGo gauge for tray insertion. Eject force: 5-15N. Card retention test. Cycle test for eject mechanism (5,000+). Dimensional check of thickness. Surface defect inspection at 5x magnification.
Color consistency matching with phone housing. Visual inspection for surface marks and edge burrs.
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