An injection mold design RFQ works best when the buyer defines the part, production target, acceptance criteria and required design deliverables before comparing quotations. The supplier should identify assumptions and open decisions so that a preliminary estimate is not mistaken for a complete mold specification.
Prepare the design input package
- 提供現行 3D 模型、2D 圖面、版本及任何受控介面或配對件。
- 標明樹脂牌號、顏色、指定添加劑（如有）、表面處理及任何材料限制。
- 標註功能關鍵尺寸、外觀區域、組裝要求與測試標準。
- 說明預期需求、訂單模式、目標市場及已知的生產機台限制。
- 列出未決設計事項、要求的替代方案及有權核準變更的人員。
若需求未知，請標註為待審假設，而非讓各投標方自行填補。
要求進行與該零件綁定的設計審查
Request a DFM review that identifies the geometry or specification items needing a decision. Depending on the part, the review may cover wall transitions, draft, ribs and bosses, undercuts, gate and runner options, venting, cooling, ejection, weld-line locations and dimensional risks. Ask the designer to show where each concern occurs on the model and state the proposed action, trade-off and approval owner.
Define the mold design deliverables
Agree which documents are included before release to machining. A project may require a mold layout, assembly and component drawings, bill of materials, cooling and ejection details, the selected gate and runner design, standard-component information, and a revision-controlled 3D assembly. If simulation or flow analysis is requested, define the model inputs, outputs, assumptions and review meeting; a simulation is an engineering aid, not a substitute for sample validation.
Set sample and acceptance gates
Specify how the first tool trial will be documented, how samples will be identified, which dimensions and visual criteria will be checked, and how deviations will be approved. Link design changes to the applicable drawing and mold revision. Define the decision required before the tool proceeds to the next build or production stage, and state who pays for changes caused by a changed requirement versus a design or manufacturing nonconformance.
Agree the commercial and handoff terms
Clarify whether the price covers design, mold manufacture, trials, sample shipment, reports, spare parts, modifications and maintenance. Document tooling ownership, storage, transfer conditions and the native files or records the buyer will receive. A quote that excludes these items should make the exclusions visible.
For more on gate and runner choices, see DAYIN’s Vietnam injection molding gating-system design overview. For project scope, see the 客製化塑膠射出成型服務 和 射出成型產品設計指南.