What Should You Include in a Double Shot Molding Tooling RFQ?

A reliable quote for custom double shot molding tooling starts with a clear project brief. Suppliers need to understand the part, the two materials and how they bond, the required mold configuration, and the production and inspection expectations. With these details, they can estimate tooling complexity, schedule, and the validation work needed before production.

Prepare a Complete Tooling Brief

Begin with the part definition: provide a product drawing, 3D CAD files, or a physical sample. Include critical dimensions, parting-line expectations, surface requirements, and an explanation of how the first shot relates to the second shot. These details help the tooling team assess the mold layout and determine how samples should be checked.

Describe both materials and any overmolding requirements, then state the preferred cavity count, mold steel, surface finish, hot-runner preference, and target mold life. Available specifications include S50C, P20, and 1.2738 for mold bases; H13 and 718H mold steel; single- or multi-cavity construction; SPI or VDI finishes; and an optional hot runner. The stated mold-life range is 50,000 to 1,000,000 shots.

• Attach the part drawing, 3D data, or sample, and identify the two-shot structure.
• Specify material grades, cavity arrangement, mold steel, finish, hot-runner needs, and expected shot count.
• Provide order quantity, sample-approval requirements, delivery target, and destination market.
• Explain the end use, such as an electronics housing or appliance component, and note any application-specific requirements.

Align Schedule, Production, and Inspection

Keep tooling development timing distinct from the schedule for molded parts. Longterm Mold lists 35–45 working days for complex precision molds, including double shot and overmolding tools. For projects that combine mold development with injection production, the stated lead time is 25–35 days for the mold, followed by 7–15 days of mass production after sample approval.

Include the required quality checks in the request so the supplier can define validation scope and cost. Available procedures include incoming inspection (IQC), mold trials, dimensional checks, CMM measurement, surface inspection, full inspection before shipment, and trials over multiple cycles. Identify the critical dimensions and surfaces, the samples requiring approval, and which results need to be documented.

Compare the Available Project Models

Relevant Experience and Quality Systems

Longterm Mold reports double shot overmolding experience on a consumer electronics shell for a French product brand, with good alignment and stable trial samples. Its documented work also includes electronic housings, home-appliance parts, and industrial equipment housings. Sharing the intended application helps the supplier tailor tooling and inspection plans to the product.

Longterm Manufacturing Solutions Limited holds ISO 9001:2015 certification covering the design, manufacture, and sale of precision molds, as well as the sale of plastic products. The certification is applicable to global markets, including the European Union, the United States, Australia, Italy, and France.

Frequently Asked Questions

Which files should I send for a double shot tooling quote?

Send a part drawing, available 3D design files, or a physical sample. Include the material grades, the relationship between the two shots, critical dimensions, finish expectations, and how sample approval will be handled.

How do I communicate cavity count and expected mold life?

State whether you need a single- or multi-cavity tool and provide the target number of shots. The listed specifications cover mold life from 50,000 to 1,000,000 shots and both single- and multi-cavity configurations.

What quality checks should the RFQ identify?

List the checks relevant to your project, such as mold trials, dimensional or CMM inspection, surface checks, sample confirmation, and full inspection before shipment. Agreeing on the inspection scope before quoting helps clarify both validation work and cost.

Conclusion

For a useful custom double shot molding tooling quote, define the part and material combination, mold configuration, expected life, steel and finish, inspection plan, order quantity, and target schedule. Longterm Mold provides custom mold making, precision double shot and overmold tooling, and mold development paired with plastic injection production. For technical support or project details, contact rogerluo@longterm-mold.com.

About Longterm Mold

Longterm Manufacturing Solutions Limited, operating as Longterm Mold, was established in 2010. It provides mold design, tooling, precision machining, mold manufacturing, and parts production for international customers. Its five R&D engineers use UG, SolidWorks, and AutoCAD, while 3-axis and 5-axis CNC machining systems support the development of 10–15 new products per month. The company serves customers mainly in North America, Europe, and Australia and holds ISO 9001:2015 certification.