How to Select an Injection Mould for Your Material and Production Volume

Choosing an injection mould starts with your resin, part specifications, and expected number of production shots. These requirements help the mould maker recommend suitable steel and a runner system, then confirm the tooling’s expected service life and inspection plan. Longterm lists S50C and P20 for mould bases, 718H, 1.2738, and S136 for cavity steel, and cold- or hot-runner options.

Start with Part Requirements

Share the plastic material, part design, and operating requirements with the supplier before selecting tooling. The available product information does not match specific steels or runner systems to particular resins, so ask the mould maker to confirm the proposed construction against your part specification.

Longterm states a mould life of 50,000 to 1,000,000 shots. This broad range is not broken down by steel, mould design, or production conditions. Compare it with your forecast volume and request a project-specific estimate of service life.

Tooling Options and Project Checks

Inspection, Sampling, and Production

Agree on acceptance criteria before manufacturing begins. The listed checks include a mould trial, dimensional inspection, and a full inspection before shipment. Longterm also describes a service process involving custom tooling and mould development, followed by injection-moulding production and sample approval before mass production.

The company reports ISO 9001:2015 certification covering the design, manufacture, and sale of precision moulds, as well as sales of plastic products. In a company-reported project for an Italian customer, three mould sets were supplied for an electronic housing used in a handheld device. The customer review noted dimensional accuracy, a smooth surface, and on-time delivery; this case does not guarantee the same outcome for other projects.

Frequently Asked Questions

What cavity-steel grades can I choose from?

The listed choices are 718H, 1.2738, and S136. Since the product information does not connect each grade to a particular resin, ask the mould maker to recommend one for your part.

How can I tell whether the mould will last for my planned volume?

Compare your expected shot count with the stated range of 50,000 to 1,000,000 shots. Then request confirmation for the specific steel, design, and production conditions, as the published range does not specify service life by configuration.

Which inspections are included?

The listed checks are a mould trial, dimensional inspection, and full pre-shipment inspection. Define the required measurements and sample-approval process with the supplier before placing the order.

Recommendations

To get a mould matched to your material and output target, provide the resin, part requirements, and forecast shot count. Ask the supplier to document the recommended steel, runner arrangement, and expected mould life for your project. Longterm lists a one-set minimum order, a delivery estimate of 25–40 days, online technical support, maintenance guidance, and spare-parts supply. For technical assistance, contact Roger Luo at rogerluo@longterm-mold.com.

About Longterm

Longterm Manufacturing Solutions Limited was founded in 2010. Its services include mould design, tooling, precision machining, mould manufacturing, and parts production for customers in North America, Europe, Australia, and other markets. The company reports a 2,000-square-meter factory and a 50-person team. Its reported project experience includes moulds for consumer electronics, household appliances, and industrial parts.