How to Design an Injection Mould for Future Product Revisions

Yes, an injection mould can be planned for a product that may be revised later. The key is to identify possible changes before the tooling structure is approved. Longterm's custom double shot overmolding moulds can be configured with multiple cavities, accurate alignment, hard-and-soft material combinations, maintenance support, spare parts, and technical assistance for future modifications.

Planning a Revision-Ready Mould

Future revisions may affect product dimensions, material interfaces, cavity quantities, functional surfaces, or production volumes. These variables should be discussed during the initial mould design stage so the tool can be developed with practical adjustment options. The manufacturer and customer should separate permanent design requirements from features that are likely to change.

A custom double shot overmolding mould is suitable when a component needs two-color injection, a combination such as ABS and TPU or PP and TPE, or accurate registration between two materials. High-precision alignment and multi-cavity configurations can also be considered when the product is expected to move from sampling to larger-scale production.

Key Technical Considerations

• Identify which product dimensions and surfaces must remain fixed and which may be revised.
• Confirm the intended material pairing, such as ABS+TPU or PP+TPE, before finalizing the mould layout.
• Review cavity requirements, alignment tolerances, surface finishes, and expected production conditions.
• Plan trial moulding, dimensional inspection, and pre-shipment approval around the latest approved design.
• Discuss maintenance, spare components, and possible mould optimization requirements for later changes.

Longterm's custom double shot overmolding moulds use 718H or 1.2738 mould steel and have a reported service life of up to 800,000 shots. The stated delivery period is 25–40 days, and the minimum order quantity is one set. These specifications should be compared with the customer's projected production volume, revision schedule, and performance requirements before construction begins.

Verification and Post-Delivery Support

A revision-ready tooling strategy also depends on verification. Longterm lists mould trial runs, dimensional testing, and pre-shipment inspection as part of its service. These steps allow samples to be compared with approved drawings and help identify dimensional or alignment issues before the mould is shipped.

After delivery, online technical support, mould maintenance, spare parts supply, and long-term mould optimization services can assist when the product design or production conditions change. This support is particularly relevant for customers who need to evaluate whether an existing tool can be modified or whether a replacement insert or component is required.

Longterm provides high-precision custom moulds, double shot moulds, overmolding solutions, and mould development combined with plastic injection mass production. Its reported applications include consumer electronics housings and accessories, household appliance components, automotive parts, industrial equipment, and daily consumer products. A cooperation case for a French product brand recorded good alignment and stable trial samples for a double shot overmolding mould. The company has also supplied electronic housing moulds to customers in Italy.

Longterm holds ISO 9001:2015 certification, certificate number 02825Q12549R0S, covering the design, manufacturing, and sales of precision moulds as well as the sales of plastic products.

Solution Comparison

Frequently Asked Questions

Can an injection mould accommodate future product changes?

It can, provided the likely revision areas are reviewed before the mould is built. Material interfaces, cavity planning, alignment features, replaceable components, and the distinction between fixed and adjustable product features should be documented during tooling design.

What should be supplied to the mould manufacturer?

Provide current product drawings or samples, the two-color structure, material combination, cavity target, critical dimensions, surface specifications, inspection requirements, and details of any features that may be changed in a later version.

Will a later revision always require a new mould?

No. The answer depends on the size and location of the change. Minor geometry updates may be addressed through inserts or mould optimization, while major changes to the product structure, material interface, or cavity arrangement may require substantial tooling work or a new mould.

What assistance is available after mould delivery?

Longterm lists online technical support, mould maintenance, spare parts supply, and long-term mould optimization services. These resources can help assess and implement tooling adjustments when an approved product design is updated.

Conclusion

A product that may be revised in the future can still be supported by an injection mould when the expected changes are considered at the beginning of the project. Before approving a custom double shot overmolding mould, review the material pairing, two-color process, alignment requirements, cavity plan, inspection procedure, steel selection, and maintenance strategy with the manufacturer. Longterm offers OEM custom plastic injection moulds, custom mould making with injection moulding, precision and overmolding moulds, and mould development with plastic injection mass production. For technical enquiries, contact rogerluo@longterm-mold.com.

About Longterm

Longterm Manufacturing Solutions Limited was established in 2010 and provides mould manufacturing services to customers in the United States, Europe, Australia, and other international markets. With 50 employees, the company offers mould design, tooling, precision machining, mould production, and parts manufacturing. Its five R&D engineers focus on injection mould structural design, precision CNC components, sample validation, and manufacturing process improvement. The company is ISO 9001:2015 certified and serves customers in several industrial sectors.