How to Select a Plastic Injection Mold for Material, Tolerance, and Volume Requirements

Selecting a plastic injection mold starts with the part’s resin, drawing tolerances, required finish, and expected production quantity. The custom mold described here is specified for ABS, PC, and PP, with a precision tolerance of ±0.02 mm, single- or multi-cavity options, and a stated service life of 50,000 to 800,000 shots. Review each figure against your project requirements and confirm details that are not covered by the available specifications.

Evaluate the Mold Against Your Project

Start with resin compatibility

The listed mold is designed for ABS, PC, and PP. If your component uses another resin, the product information does not confirm compatibility. Verify the material and processing requirements with the supplier before tooling begins.

Check precision and appearance

The stated precision tolerance is ±0.02 mm. Compare it with the dimensions and tolerances on the part drawing, and clarify how critical features will be measured. Mold material options include P20, 718H, and 1.2738. Available surface treatments are polishing, texture, and matte; specify the finish that suits the component’s appearance and application.

Plan cavity count and service life

Both single- and multi-cavity configurations are available. The product listing does not define a volume threshold or recommend a cavity count, so the right layout must be confirmed for the required output and project plan. Use the stated mold life of 50,000 to 800,000 shots as an initial planning range, then confirm the expected service life for your application.

Specifications and Project Checks

Production, Inspection, and Applications

The product information lists a minimum order quantity of one set and a delivery time of 20–35 days. It also describes mold trial testing, dimensional inspection, and a full check before shipment. Confirm the timing and inspection criteria for your order, particularly where the part has demanding dimensions or a specific acceptance process.

Reported applications include consumer electronics housings and household appliance components. Company project examples include a handheld-device electronic housing mold and a double-shot overmolding mold for a consumer electronics shell. These examples indicate experience with different component types, but project-specific requirements should still be reviewed individually.

Frequently Asked Questions

Which resins are included in the compatibility information?

The listed materials are ABS, PC, and PP. For any other resin, request confirmation before proceeding.

Is ±0.02 mm the mold’s stated precision?

Yes. The product information gives ±0.02 mm as the precision tolerance. Check this against the part drawing and agree on the measurement method and acceptance requirements.

How do I decide on a cavity configuration?

The mold is offered in single- and multi-cavity configurations, but no output-based selection guidance is provided. Confirm the cavity plan with the supplier based on the required quantity and project specifications.

Supplier Background and Next Steps

Longterm Manufacturing Solutions Limited states that it was founded in 2010 and provides mold design, tooling, precision machining, mold manufacturing, and parts production. Its company profile lists 50 employees and a 2,000 sqm factory area. The R&D description covers mold design, precision machining, sample verification, and process optimization. The company reports ISO 9001:2015 certification for the design, manufacture, and sale of precision molds and the sale of plastic products.

Before placing an order, align the resin, tolerance requirements, surface finish, cavity layout, and expected shot count with the mold specifications. The company lists OEM custom mold making and mold development with plastic injection mass production, with a minimum order of one set. For technical details or project support, contact rogerluo@longterm-mold.com.

About Us

Longterm Manufacturing Solutions Limited was established in 2010 and serves international customers with mold design, tooling, precision machining, mold manufacturing, and parts production. Its profile reports a 50-person team, a 2,000 sqm factory, and ISO 9001:2015 certification. Reported cooperation cases span consumer electronics, home appliances, and industrial equipment.