Injection Molding RFQ: Tooling, Cost and Production Checklist

Prepare an injection molding RFQ with CAD, resin, volumes, tooling scope, secondary operations and acceptance criteria for a meaningful manufacturing quotation.

Discuss your project

Define the program before comparing prices

An injection molding quotation is only comparable when the underlying assumptions match. A part price can exclude the tool, fixtures, decoration, assembly, inspection or packing. Ask for those items to be identified separately.

Concept CAD is enough to begin a feasibility discussion, but it is not the same as a production-ready specification. Identify open decisions and request an initial engineering scope before treating a preliminary estimate as a committed production price.

The RFQ package

Geometry and revision

Provide 3D CAD and a 2D drawing identifying critical dimensions, tolerances, datums and surface requirements. Label the revision and list mating components. Explain which dimensions are still provisional.

Resin and appearance

Specify the material grade where known, reinforcement, color, texture and permitted alternatives. State relevant environmental, chemical, thermal or customer requirements. If the resin is undecided, share the operating conditions for review.

Order pattern

Give first-order quantity, annual forecast, expected release quantities and program life. A yearly total alone does not show launch demand, delivery frequency or the required production rate.

Complete supply scope

Separate molded parts from painting, printing, inserts, welding, hardware, assembly, tests and packaging. Identify customer-supplied parts and the required delivery destination.

What drives injection mold tooling cost?

Tool complexity depends on the part geometry, cavity count, side actions, inserts, surface requirements and expected tool life. The quotation should explain the proposed mold arrangement rather than present an unexplained lump sum.

Compare tool design, mold construction, sampling, dimensional reporting and included engineering changes. Ask which fixtures, gauges, spare parts and maintenance obligations are excluded. For production in another facility, confirm press compatibility and the transfer documentation before tool release.

Createch reviews these requirements through tool design and fabrication. For relocation, see the China-to-Mexico mold transfer guide.

Separate one-time investment from recurring part cost

Request individual lines for engineering/NRE, mold tooling, assembly or test fixtures, validation samples and recurring production. Resin usage, machine time, cavity arrangement, handling, scrap assumptions and secondary operations affect unit cost; the production plan must establish these inputs.

A lower tooling price is not automatically a lower total program cost. Compare the same volumes and quality scope, then review how design changes could simplify tooling, reduce separate parts or remove unnecessary finishing. Avoid assigning a target price without also defining the product requirements it must satisfy.

Prototype and production parts serve different purposes

A visual prototype can help review size and handling, but it does not establish the shrinkage, appearance or performance of an injection-molded production part. State whether the next build is for appearance, fit, functional evaluation or production-process validation. Ask the engineering team to recommend a suitable prototype route and identify its limitations.

For a new program, review product development through manufacturing and the plastic-part DFM checklist before committing to steel.

Questions to resolve before approving the quote

What remains an estimate, and what information makes it firm?
Who owns the tooling, CAD and fixtures, and what transfer terms apply?
Which sample rounds and drawing revisions are included?
What inspection, quality documentation and acceptance criteria apply?
What are the minimum release quantities and packaging assumptions?
Which site performs molding, finishing and assembly?
Which milestones depend on customer approvals or supplied components?

Send the available information even if some decisions are open. A clear list of unknowns makes the technical review more useful than an apparently complete package built on unconfirmed assumptions.