1. Wall thickness, ribs and bosses
Uneven walls and heavy intersections can create sink marks, voids, warpage and long cooling time. DFM checks whether ribs and bosses provide strength without accumulating too much plastic, and whether the chosen material supports the target geometry.
2. Draft angle and ejection
Draft helps the part release from the cavity without scuffing or deformation. Texture, deep walls, snap fits and polished cosmetic surfaces may need different draft decisions. Ejector locations should support the part without leaving unacceptable marks.
3. Gate, venting and cooling strategy
Gate location affects weld lines, flow marks, packing, sink marks and visible surfaces. Venting helps prevent air traps and burns, while balanced cooling protects dimensions and cycle time. These decisions should be reviewed with material flow and product appearance in mind.
4. Tolerance and assembly risk
DFM should review mating parts, screw bosses, snap fits, sealing surfaces and critical gaps. Material shrinkage, mold tolerance and process variation all influence assembly. Marking critical dimensions on the 2D drawing gives the mold maker a clear priority list.
5. DFM review with Huanze Technology
Huanze reviews plastic housings, electronics enclosures, connector plugs, automotive plastic parts, medical device housings and other injection molded components before tooling. Send STEP, X_T, IGS or 2D drawings to Annie at +86 15801883001 by WhatsApp, WeChat or phone, or email annie@huanzekeji.com.
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