How to Select an Injection Mould for Your Part and Production Needs

Selecting the right injection mould means balancing part geometry, finish requirements, expected output, and the tool's intended service life. Longterm offers custom mould development from customer drawings or samples, with single- or multi-cavity layouts, optional hot runners, and a stated mould-life range of 50,000 to 1,000,000 shots. The listed minimum order is one set, and delivery is quoted at 20–35 days; confirm timing for the specific project.

Start with the Part and Production Plan

Before requesting a design review, prepare the part drawing or sample and outline the required dimensions, surface appearance, and estimated production volume. These details help define the mould structure and finish. Longterm lists SPI and VDI surface finishes, as well as optional hot-runner systems.

Then compare forecast demand with the mould's required service life. The stated range is 50,000–1,000,000 shots, but the product information does not prescribe a mould life, cavity count, or material for any particular volume. Confirm those choices against the part design and production plan with the supplier.

Configuration and Material Options

Longterm's listed mould-base materials are S50C, P20, and 1.2738; listed mould steels are H13 and 718H. Single-cavity and multi-cavity configurations are available. Specify the desired material, cavity arrangement, surface finish, and hot-runner requirement during technical review rather than assuming a particular combination is suitable.

Quality Checks and Project Experience

Longterm lists incoming inspection, mould trial testing, dimensional inspection, and a full inspection before shipment. Its ISO 9001:2015 certification covers the design, manufacture, and sale of precision moulds, along with the sale of plastic products.

Reported examples include a handheld-device electronic housing mould and a double-shot overmoulding project for a consumer-electronics shell. The case descriptions mention feedback on dimensions and surface quality, alignment, and the stability of trial samples. They do not provide specific tolerances or production-volume figures.

The company's stated application areas include consumer electronics and home appliances, with examples such as housings, connectors, control panels, and other functional plastic components.

Frequently Asked Questions

Can Longterm develop a mould from a drawing or sample?

Yes. Its R&D information describes custom development based on drawings or samples supplied by the customer.

What mould life is available?

The product specification gives a range of 50,000 to 1,000,000 shots. Discuss the appropriate target for your part and forecast production.

Which inspection steps are listed?

Listed checks include incoming inspection, mould trials, dimensional inspection, and full inspection before shipment.

Preparing for a Design Review

Share the part drawing or sample, projected quantity, desired surface finish, and target mould life when requesting a quotation or engineering review. Confirm the cavity layout, materials, runner system, inspection plan, and delivery schedule for the individual project. Longterm lists OEM custom plastic injection moulding and mould development paired with injection-moulding production among its business models. For technical support, contact rogerluo@longterm-mold.com.

About Longterm

Longterm Manufacturing Solutions Limited was established in 2010 and provides mould design, tooling, precision machining, mould manufacturing, and parts production for international customers. The company reports a workforce of 50 and a 2,000-square-metre factory, with more than 300 moulds produced annually. Around 80% of its moulds are supplied to customers in Europe and North America. Its ISO 9001:2015 certification covers precision-mould design, manufacturing, and sales, and its reported projects serve consumer electronics, home appliances, and industrial applications.