An injection molding DFM checklist should resolve geometry, material, tooling, process, quality, and production risks before mold steel is cut. The purpose is not to force every part into one design style; it is to expose decisions that affect function, cost, toolability, repeatability, and approval.
Part geometry checklist
- Wall thickness is practical for the resin, flow length, appearance, and cooling requirements.
- Draft, ribs, bosses, holes, corners, and texture allow release without damaging the part.
- Undercuts are identified, with slides, lifters, collapsible cores, or part redesign evaluated.
- Parting line, shutoffs, ejector marks, gates, weld lines, and cosmetic zones are agreed.
- Shrinkage, tolerances, datums, assembly fits, and critical-to-quality dimensions are defined.
Mold and process checklist
- Gate and runner layout supports balanced filling, packing, appearance, and manageable vestige.
- Cooling circuits reach thick sections and maintain practical temperature balance.
- Vents are placed at last-fill and gas-trap risks; ejection is adequate and safe for the part.
- Steel, inserts, standard components, mechanisms, surface finish, and maintenance access match volume and resin risk.
- Machine size, resin drying, process window, inspection method, and packaging are considered.
Release the design with evidence
Record open risks, owner, due date, and acceptance method. Use flow or cooling analysis where it can answer a real question, not as decoration. Before cutting steel, freeze the part revision, confirm tool ownership, approve the mold design, and define the trial and dimensional-report requirements.
Plan the next step
Share your part, resin, annual volume, critical dimensions, finish, and timing with the Cavity Mold team. We can review the manufacturing risks and recommend a practical next step through our contact page.
Related Cavity Mold resources
- Injection mold engineering services
- Injection mold making services
- Plastic injection molding services
- Contact Cavity Mold