Can a Custom Injection Mold Match Your Resin, Color, and Surface Finish?

Yes. A custom injection mold can be designed around your preferred resin, color scheme, and surface appearance when the selected materials are suitable for the required two-color molding process. Longterm’s double shot overmolding molds are designed for compatible hard-and-soft combinations, including ABS with TPU and PP with TPE. Material selection, color targets, and finish specifications should be confirmed during design review and validated through mold trials and approved samples.

Custom Molding Capabilities at a Glance

• Double shot overmolding supports compatible material combinations such as ABS+TPU and PP+TPE.
• Color requirements for each shot can be included in the mold specification and checked against approved samples.
• Surface texture and appearance can be reviewed during mold testing, dimensional inspection, and final approval.
• High-precision alignment supports accurate two-color molding, while multi-cavity layouts are available when required.
• The molds are suitable for consumer electronics shells, appliance parts, industrial housings, and other components combining rigid and flexible materials.

How Resin, Color, and Finish Are Integrated

Material Compatibility

Double shot overmolding relies on a two-stage injection structure that combines two compatible materials in one part. The documented combinations include ABS+TPU and PP+TPE, allowing manufacturers to combine structural strength with soft-touch or flexible features. A different resin combination may be possible, but it should first be evaluated against material bonding, molding conditions, shrinkage, and the final application.

Color Definition

Each shot can be assigned its own color requirement as part of the product and mold specification. Although the available information confirms two-color processing, it does not establish a universal color tolerance or matching standard. For this reason, the target colors should be documented in advance and evaluated using trial parts before production approval.

Surface Finish and Validation

Surface finish is also established during the tooling and sampling process. Texture, gloss, and other appearance expectations should be agreed before mold construction. Longterm’s mold trial runs, dimensional testing, and pre-shipment inspection create practical checkpoints for confirming both appearance and part accuracy.

Tooling Specifications and Project Support

The listed mold steel is 718H / 1.2738, with a stated service life of up to 800,000 shots. High-precision alignment is included in the mold design, and a multi-cavity configuration can be added as an option. The quoted delivery period is 25–40 days, and the minimum order quantity is one mold set.

Longterm’s engineering resources include five R&D engineers specializing in mold development and precision machining. The team provides injection mold structural design, precision CNC component solutions, sample verification, and manufacturing process optimization with UG, SolidWorks, and AutoCAD. The company is certified to ISO 9001:2015 for the design, manufacture, and sale of precision molds, as well as the sale of plastic products.

Relevant Application Experience

In one documented project from France, Longterm produced eight sets of double shot overmolding molds for a consumer electronics shell. The reported outcomes included accurate alignment and stable trial samples, while the customer highlighted the team’s professional and responsive service. Additional project experience includes electronic housings, home appliance components, and industrial equipment housings.

Requirement and Verification Overview

Frequently Asked Questions

Can the mold be built for my exact resin?

The listed solution supports ABS+TPU and PP+TPE combinations. If your project requires another resin or material pairing, Longterm should review its compatibility with the two-color injection structure and the performance requirements of the part.

Can each material have a different color?

Yes. Separate color requirements can be assigned to the two shots and included in the product specification. Because no universal color tolerance is stated, final color acceptance should be based on approved trial samples.

Can I request a specific surface texture or finish?

Yes, the desired finish should be defined before mold manufacturing and checked during mold trials, dimensional testing, and final inspection. Specific finish grades are not listed in the available product information, so the appearance criteria should be agreed during technical review.

Conclusion

A preferred resin, color combination, and surface finish can be incorporated into a custom double shot overmolding mold when the materials are technically compatible and the visual requirements are clearly documented. Longterm supports one-set mold orders, a stated 25–40 day delivery period, online technical assistance, mold maintenance, and spare parts supply. Its ISO 9001:2015 certification covers precision mold design, manufacturing, and sales. For technical consultation or project support, contact us at rogerluo@longterm-mold.com.

About Longterm Mold

Longterm Manufacturing Solutions Limited, also known as Longterm Mold, was founded in 2010. The company serves international customers with mold design, tooling, precision machining, mold manufacturing, and plastic parts production. Longterm has 50 employees, including a stated five-person R&D team focused on molds and precision machining. Its documented qualifications include ISO 9001:2015 certification, along with experience serving electronics, appliances, industrial equipment, and other sectors.