How to Select the Right Double-Shot Molding Process for Your Product

Selecting a double-shot molding process starts with the part's requirements: the materials or colors it combines, the accuracy needed between molded sections, and the expected production volume. Review the mold specification, quality checks, lead time, and ongoing support as well, so the selected setup fits both the design and the production plan.

Start with the Part Requirements

Double-shot overmolding is suited to parts that bring two materials or colors together in a single molded structure. The listed mold supports hard-and-soft combinations such as ABS+TPU and PP+TPE. Verify that your specific material pair meets the product's functional and design requirements; the available specification does not provide a complete compatibility list.

Consider the part's application and geometry when defining the tooling. Listed applications include consumer electronics shells, household appliance housings, and functional plastic components. Alignment precision and cavity count should be established from the part design and production needs: high-precision alignment is specified, while multi-cavity configurations are optional.

Review Tooling and Quality Specifications

The mold material is listed as 718H / 1.2738 steel, with a stated service life of up to 800,000 shots. Check that these specifications suit your expected production volume and project requirements. Before ordering, also confirm trial-run arrangements, dimensional testing, and pre-shipment inspection criteria.

Longterm reports a double-shot overmolding project for a French product brand's consumer electronics shell. The customer noted good alignment and stable trial samples. The company's ISO 9001:2015 certification covers the design, manufacturing, and sales of precision molds, as well as the sales of plastic products.

Compare the Main Selection Factors

Frequently Asked Questions

Which material combinations are specified?

ABS+TPU and PP+TPE are listed as examples of hard-and-soft material combinations.

What quality checks are listed?

The stated checks include a mold trial run, dimensional testing, and inspection before shipment.

How long is delivery, and what support is available?

The listed delivery period is 25–40 days. After-sales services include online technical support, mold maintenance, and spare-parts supply.

Make the Selection

Before choosing a process, match the material pair, alignment tolerances, cavity configuration, mold specifications, inspection plan, and delivery schedule to your product requirements. Longterm offers custom double-shot overmolding molds with a minimum order of one set, along with technical support, maintenance, and spare parts. For technical details or assistance, contact Roger Luo at rogerluo@longterm-mold.com.

About Longterm

Longterm Manufacturing Solutions Limited was established in 2010 and provides mold design, tooling, precision machining, mold manufacturing, and parts production for international customers. The company has 50 employees and serves markets in North America, Europe, and Australia. Its ISO 9001:2015 certification covers precision mold design, manufacturing, and sales, and it has worked with clients across multiple industries.