Design guide hub
All DFM topics on one route.
Design guide hubDFM
Venting: Injection Molding Design Rules
Trapped air shows as burns, short fills, or weak knit areas.
DFM
Design ribs and pockets so air has a path
Rules NetProto DFM review checks against before steel is ordered.
Deep ribs without vent paths are common burn sites.
Texture and vent depth are mold details tied to your geometry.
CAD checklist
Send this with your upload
Missing DFM inputs delay qualified quotes.
Suspected air trap regions marked
If burns appear in T1, cross check /injection-molding-defects/burn-marks
Related rules
Design guide
Jump to sibling rules before you freeze CAD.
DFM article
Long form engineer guide.
DFM articleWall thickness
Design rules for wall thickness.
Wall thicknessDraft angle
Design rules for draft angle.
Draft angleRib design
Design rules for rib design.
Rib designFAQ
Common questions
Is venting only a mold issue?
Part geometry drives where vents must live.
Next step
Upload CAD for DFM-aware quoting
One hardened steel tool quote with piece price on the same upload.