Injection Mold Design Guide //top\\ Jun 2026

Ribs increase part stiffness without adding significant wall thickness. Rib thickness should be 40% to 60% of the nominal wall thickness to prevent sink marks.

Different resins (like ABS vs. Nylon) have varying shrinkage rates that affect wall limits. 2. Mastering Draft Angles injection mold design guide

A large plate that pushes the entire perimeter of a part. Perfect for cylindrical objects like caps, bottles, or cups to avoid leaving pin marks. Ribs increase part stiffness without adding significant wall