When this service fits
What buyers receive
RFQ details that improve the answer
Send 3D CAD, material target, annual or first-order quantity, cosmetic finish, tolerance requirements, target market and any existing sample notes. If a mold or supplier issue already exists, add photos and the current issue list.
Buyer intent and RFQ focus
| Decision area | What to clarify |
|---|---|
| Best-fit buyer need | Buyers comparing custom plastic injection molding suppliers for CAD-ready parts, T1 samples, bridge quantities or repeat production. |
| Quote variables | Part size, wall thickness, resin, color, finish, tolerance, annual volume, first order, mold ownership and quality documents. |
| Evidence to request | DFM notes, T1 sample checklist, dimensional report, material confirmation and packing photos before production release. |
How buyers should use this route
This page helps the buyer decide whether the conversation is ready for mold quotation, still needs DFM cleanup, or should start with a lower-risk pilot route. A useful inquiry does not only ask for a unit price. It explains the project stage, the part function, the approval gate, and the evidence needed before the buyer commits budget.
For competitive sourcing, compare suppliers on the assumptions behind the quote: cavity count, steel, gate strategy, visible marks, sample correction policy, quality records and what happens after T1. Those details usually explain more cost and lead-time difference than a short price table.
Related molding decisions
Compare molding quotations beyond the unit price
A molded-part price depends on resin, tool assumptions, volume and acceptance requirements. Ask suppliers to quote the same part revision and demand plan, then separate recurring part costs from tooling and validation costs.
- Part revision and resin basis
- Record drawing/CAD revision, resin grade, color and permitted recycled or regrind content. Ask how material substitutions are approved rather than assuming all quotes use the same resin.
- Volume and production assumptions
- Compare order quantity, annual demand, cavity count and delivery splits. Ask which assumptions support the quoted price and what changes it; a proposed cycle time is not a validated production result.
- Tool ownership and included work
- Separate the mold, DFM, tooling trials and recurring production. Record mold ownership, maintenance responsibility, storage and transfer conditions, including any costs for using an existing customer-owned tool.
- Dimensions and appearance
- Identify critical dimensions, datums, appearance zones and texture or color references. State the measurement method and sampling basis to agree; do not treat a generic tolerance claim as an inspection plan.
- Trial approval and secondary operations
- List trial sample quantities, measurement reports and correction rounds. Separate inserts, printing, welding, assembly and packaging; define who approves the sample and how changes are priced.
- Delivered cost and reorder basis
- Compare freight terms, destination, material-price assumptions and quote validity. Keep the approved resin, tool and part revisions with the reorder record so the next batch is priced on the same basis.
Download the blank injection molding quotation comparison (CSV)
Worksheet version 1.0. Fill in two suppliers' actual quotations and revisions; no supplier prices or results are prefilled. Resolve exclusions before comparing totals. After scope approval, use the project review record to track revisions and decisions.