DFM · Mold
DFM for injection molds
Wall thickness, draft, undercuts and cooling — design choices that cut tool cost.
DFM (design for manufacture) for injection molds means aligning the part with how steel and resin actually behave — draft, walls, gates and cooling — before the tool is cut.
Uniform wall thickness reduces sink and warpage. Draft angles free the part from the cavity. Sharp corners and sudden thickness jumps create stress and fill problems; radii and gradual transitions help.
Gate location, runner type (hot / cold) and cooling layout drive cycle time and cosmetic quality. Early DFM notes on STEP files save weeks of tool revision later.
What we usually check
- Walls, ribs and draft
- Undercuts and side actions
- Gate / runner strategy
- Cooling and cycle-time risk
- Material (PP / ABS / PC / PA+GF…)
Quote
Talk this through
A STEP file or short note is enough.