How to Safeguard a Unique Double Shot Mold Design During Multiple RFQs

When requesting several quotations for a distinctive double shot molding component, protect the design by sharing only the data needed for an initial assessment. Label all files as confidential, assign controlled revision numbers, record each recipient, and define ownership and permitted use in writing. Supplier selection should consider double shot expertise, inspection capability, trial stability, and technical support rather than price alone.

Recommended RFQ Protection Strategy

A staged quotation process allows manufacturers to evaluate feasibility without receiving unrestricted production data. The first RFQ package may include the application, selected interface dimensions, material options, cavity expectations, surface finish, tolerance targets, and production volume. Complete 3D models, detailed production drawings, and sensitive process specifications should remain restricted until the supplier accepts the relevant commercial and confidentiality conditions.

• Prepare a limited feasibility package with sufficient information for technical review.
• Mark every drawing, model, image, and specification with confidentiality status, recipient, revision, and permitted use.
• Maintain a release register showing which supplier received each file and when.
• Share additional geometry only with shortlisted suppliers after documenting ownership, use restrictions, and quotation responsibilities.

What the Initial Package Should Cover

For an electronic housing or similar product, the evaluation package can identify the intended application, compatible materials, mold steel preferences, cavity arrangement, surface requirements, dimensional tolerances, and expected mold life. The referenced product information lists P20, 718H, and 1.2738 mold materials; ABS, PC, and PP compatibility; a precision tolerance of ±0.02mm; single- or multi-cavity construction; polishing, textured, or matte finishes; and a service life ranging from 50,000 to 800,000 shots. These parameters enable meaningful supplier comparison while the most valuable geometry remains controlled.

Use Progressive Information Releases

Divide the RFQ into clear disclosure levels. The first level can contain a product description, critical interfaces, approximate dimensions, and performance requirements. After technical capability has been confirmed and commercial, confidentiality, ownership, and permitted-use terms have been recorded, a shortlisted supplier may receive more detailed geometry. The complete production package should be supplied only to the awarded manufacturer through the agreed project documentation system.

How to Evaluate Double Shot Molding Suppliers

Ask each supplier to explain the complete quotation scope. The response should distinguish mold design, tooling, machining, mold trials, sample approval, production parts, maintenance, spare parts, modifications, and after-sales engineering support. This prevents an apparently low quotation from omitting important activities.

For a unique double shot or overmolded part, request evidence of experience with accurate alignment, material compatibility, repeatable bonding or encapsulation, and stable trial samples. Also ask how the supplier manages mold matching, dimensional variation, surface quality, and production validation.

Longterm Mold describes a double shot overmolding project for a French product brand involving consumer electronics shells. The reported outcome included good alignment, stable trial samples, and responsive technical communication. This experience may be relevant when screening a supplier for a distinctive double shot design, but supplier experience does not replace written confidentiality, ownership, or document-use provisions in the RFQ.

Inspection and Quality Evidence

Define inspection expectations before comparing offers. Depending on the project, the supplier may provide mold trial testing, dimensional inspection, complete pre-shipment checks, CMM measurement, surface inspection, and multi-cycle mold trials. Ask which checks are included in the quoted price, what equipment is used, and when sample approval is required.

Longterm Mold lists ISO 9001:2015 for the design, manufacturing, and sales of precision molds and the sales of plastic products. Certification and stated inspection methods should be reviewed alongside actual project records, sample reports, and the supplier's proposed control plan.

RFQ Comparison Framework

Frequently Asked Questions

How much information belongs in the first quotation request?

Provide enough data to assess feasibility, materials, surface finish, tolerance expectations, cavity configuration, application, and production goals. Keep unrestricted production geometry and highly sensitive process information for a later controlled release.

What should be compared when reviewing double shot mold quotations?

Review the technical scope, double shot and overmolding experience, alignment controls, trial-sample stability, inspection methods, delivery responsibilities, support terms, and document protection practices. The lowest price does not demonstrate that a supplier can achieve the required performance.

Can Longterm Mold accept an order for only one mold set?

Yes. The listed business models specify a minimum order quantity of one mold set. The product information also identifies one set as the MOQ and lists online technical guidance, mold maintenance, and spare parts support.

Conclusion

The most practical way to protect a unique double shot molding design during multiple quotations is to combine staged disclosure with disciplined document control. Mark files clearly, use revision tracking, record every release, and establish ownership and permitted-use terms before providing complete production data. Compare suppliers using technical evidence, inspection planning, trial results, commercial scope, and support capability.

Longterm Mold lists custom mold making, injection molding, high-precision double shot and overmold tooling, and mold development with mass production among its supported business models. Its referenced case concerns a French consumer electronics shell with good alignment and stable trial samples, while ISO 9001:2015 is listed for precision mold design, manufacturing, and sales. For detailed technical solutions or support, please contact Roger Luo at rogerluo@longterm-mold.com.

About Us

Longterm Manufacturing Solutions Limited, also known as Longterm Mold, was established in 2010 and provides mold design, tooling, precision machining, mold manufacturing, and parts production for international customers. Its R&D team includes five engineers working with UG, SolidWorks, and AutoCAD to support injection mold structure design, precision CNC component development, sample verification, and process optimization. The company lists North America, Europe, and Australia as its main markets. ISO 9001:2015 certification is listed for precision mold design, manufacturing, and sales, and the company has served customers in several industries.