How to Prepare an Accurate Quote Request for Double Shot Molding Tooling

To price custom double shot molding tooling accurately, a supplier needs enough information to evaluate the part, mold design, validation plan, and production schedule. Send the part drawing or a physical sample, explain the two-material structure, and outline your requirements for cavities, mold steel, finish, tool life, inspection, quantities, and delivery.

Start with the Part and Its Requirements

Define the component before discussing tooling options. Include product geometry, critical dimensions, parting requirements, and how the first and second shots fit together. A 3D model, engineering drawing, or sample helps the tooling team assess the mold structure and determine how samples should be checked.

Describe both materials and any overmolding requirements. Also specify the intended application, such as an electronics enclosure, appliance component, or industrial equipment housing. Application conditions can influence mold planning, surface expectations, and inspection priorities.

Set the Tooling Specifications

Include your target cavity count, expected mold life, preferred steel, surface finish, and whether you want a hot runner. Available options include S50C, P20, and 1.2738 mold bases; H13 and 718H mold steel; single- or multi-cavity layouts; and SPI or VDI finishes. The listed mold-life range is 50,000 to 1,000,000 shots, so state the expected shot count for your project.

Plan Validation, Production, and Delivery

Specify the inspection and approval steps you require. Options include incoming material inspection (IQC), mold trials, dimensional checks, CMM measurement, surface inspection, multi-cycle trials, and full inspection before shipment. Identify critical dimensions and surfaces, the samples that need approval, and which results must be documented.

Keep mold development timing separate from the mass-production schedule. Longterm Mold states a lead time of 35–45 working days for complex precision molds, including double shot and overmold tooling. For projects that continue from mold development into injection production, the stated timing is 25–35 days for the mold, followed by 7–15 days of production after sample approval. Share your target delivery date, order quantity, export destination, and sample-approval process when requesting a quote.

Relevant Experience and Quality Credentials

Longterm Mold has documented double shot overmolding work for a consumer electronics shell for a French product brand. Trial samples were reported to have good alignment and stable results. The company also cites projects involving electronic housings, home-appliance parts, and industrial equipment housings.

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 relevant to projects serving global markets, including the EU, the United States, Australia, Italy, and France.

Quotation Options at a Glance

Frequently Asked Questions

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

Provide a part drawing, 3D design file if available, or physical sample. Include material details, how the two shots interact, critical dimensions, surface requirements, and your sample-approval criteria.

How do I describe cavity count and mold life?

State whether you need a single-cavity or multi-cavity mold and provide the expected shot count. The listed product specification covers tool life from 50,000 to 1,000,000 shots.

Which inspection steps should I request?

Choose the checks that match your project, such as dimensional inspection, CMM measurement, mold trials, sample confirmation, surface inspection, or full inspection before shipment. Agree on the scope before the quotation is finalized.

Preparing Your Request

A useful request for quotation brings together the part definition, material and overmolding details, mold-life target, cavity plan, steel and finish preferences, inspection scope, quantity, and delivery schedule. Longterm Mold offers custom mold making, precision double shot and overmold tooling, and mold development with plastic injection production. For technical details or project support, contact rogerluo@longterm-mold.com.

About Longterm Mold

Longterm Manufacturing Solutions Limited, operating as Longterm Mold, was founded 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, and the company supports 10–15 new product developments per month with 3-axis and 5-axis CNC machining systems. Its main markets are North America, Europe, and Australia. The company is ISO 9001:2015 certified and serves customers across multiple industries.