Downloadable guide

Designing for Molding: Walls, Ribs, Draft and the Defects They Cause

A design guide written from the molder side of the table. Each rule is tied to the defect it prevents rather than listed as an absolute, because the guideline that saves a part on one tool is the one that sinks it on another. Useful before your first DFM review, and useful again when a drawing comes back marked up.

What's inside

• Nominal and acceptable wall ranges, and what a thick section is really buying you
• Rib, boss and corner rules that avoid sink marks without adding weight
• Draft, texture and egress: how appearance requirements turn into pull direction
• Tolerances you can actually hold on a shrink-prone resin, and which to relax