How to Select an Injection Mold for Your Resin and Production Needs

Selecting a plastic injection mold starts with the resin your part requires, then weighs output, dimensional tolerances, surface appearance, and expected tool life. Longterm lists compatibility with ABS, PC, and PP, offers single- and multi-cavity configurations, and specifies precision of ±0.02 mm. Its stated mold-life range is 50,000 to 800,000 shots. Confirm your project requirements with the supplier before settling on a specification.

Key Factors to Confirm

• Resin: The listed options are ABS, PC, and PP. Verify that your chosen material is suitable for the proposed mold design.
• Production output: Tooling can be single- or multi-cavity. The product information does not recommend a cavity count for a specific production volume.
• Dimensions and appearance: The stated precision is ±0.02 mm, with polishing, texture, and matte finishes available.
• Service life: The listed range is 50,000 to 800,000 shots. Confirm which specification applies to your project and expected usage.

How to Evaluate the Mold Specification

Confirm the resin and tool material

ABS, PC, and PP are identified as compatible resins. Establish which resin will be used before approving the design. P20, 718H, and 1.2738 are listed as mold materials, but the available information does not specify which tool material corresponds to each resin. Ask the supplier to recommend an option based on your part and production requirements.

Match cavity count and tool life to demand

Choose between a single- or multi-cavity configuration after reviewing the planned order volume and expected production schedule. The stated life of 50,000 to 800,000 shots is a range, not a guaranteed output for every mold. Give the supplier your target volume and usage expectations so they can assess both the cavity layout and the appropriate service-life specification.

Define tolerance, finish, and inspection needs

The product lists a precision tolerance of ±0.02 mm and offers polished, textured, or matte surfaces. Document critical dimensions and the required appearance before design approval. The listed quality process includes a mold trial, dimensional inspection, and a complete check before shipment; review trial samples and inspection results against your requirements.

Supplier Experience and Capacity

Longterm describes work on an electronic housing for a handheld device and a double-shot overmolding project for a consumer electronics shell. Reported customer feedback noted precise dimensions and smooth surfaces for the first project, and good alignment with stable trial samples for the second. The company holds ISO 9001:2015 certification covering the design, manufacture, and sale of precision molds, as well as the sale of plastic products.

The company's R&D team has five engineers specializing in molds and precision machining, with experience in injection-mold structural design, sample verification, and process optimization. Longterm reports monthly capacity to deliver 15–20 injection molds and tens of thousands of precision CNC-machined parts.

Specification Comparison

Frequently Asked Questions

Which resins can this mold process?

The listed resin options are ABS, PC, and PP. Confirm your selected resin with the supplier before the mold design is finalized.

How do I choose between single- and multi-cavity tooling?

The product is available in both configurations, but no cavity count is tied to a specific output level. Provide your target production volume so the supplier can assess the configuration.

What mold life and quality checks are listed?

The stated mold-life range is 50,000 to 800,000 shots. Listed checks include a mold trial test, dimensional inspection, and a full check before shipment.

Recommendations

Before placing an order, align the resin, cavity configuration, ±0.02 mm tolerance, surface finish, and expected shot volume with your part requirements. Longterm lists a one-set minimum order and a delivery estimate of 20–35 days. Its business models include custom mold making with injection molding, as well as mold development followed by plastic injection mass production. ISO 9001:2015 certification applies to its precision-mold design and manufacturing scope. For technical advice or mold maintenance support, contact rogerluo@longterm-mold.com.

About Longterm

Longterm Manufacturing Solutions Limited was established in 2010. It provides mold design, tooling, precision machining, mold manufacturing, and parts production for international customers. The company reports a five-person R&D team and monthly delivery capacity of 15–20 injection molds, and holds ISO 9001:2015 certification. Its customers span multiple industries.