A practical material-selection guide for medical device injection molding: when to use thermoplastic, thermoset, or liquid silicone rubber (LSR), plus supplier qualification checkpoints.

Where overmolding is used across medical, automotive, electronics, and tools—grip, seals, damping, and when it is the wrong choice.

Overmolding DFM rules: wall thickness, shut-off interference, gate location, and bond-strength design for two-material parts.

How to choose overmolding materials: TPE vs TPU, substrate compatibility, bond mechanisms, and verification before production.

Two-shot molding bonds in one cycle; overmolding needs two. Compare tooling cost, cycle time, material compatibility and break-even volume to pick the right process.（150 字符）

In-mold polish and texture are decided at tooling release; painting, printing and metallising come after. Compare SPI grades, materials and costs to specify the right finish.

A supplier is qualified only when six gates are passed with evidence: documentation, capability, quality system, IP controls, process capability and commercial fit. Includes a 22-point audit checklist and scoring model.

The real shift is from controlling a machine to controlling a process. How automation, connectivity and smart manufacturing change part cost, quality and traceability — and what to ask suppliers.

Standard injection molding holds ±0.100 mm to ±0.250 mm; precision features reach ±0.025 mm to ±0.050 mm. See the achievable tolerance matrix by feature type and how to specify limits your supplier can hold.