Injection Mold Design Guide ●

Fast machining, excellent thermal transfer; limited to low-volume production (

Ribs add structural stiffness without increasing wall thickness. Bosses create fastening points. Both can cause sink marks if oversized.

Draft is the taper applied to the sides of a part to facilitate its removal from the mold. injection mold design guide

The sprue is the initial entry point of plastic into the mold base.

Features that prevent the part from being ejected straight out are called "undercuts." Draft is the taper applied to the sides

: Secures the stationary side (A-side) of the mold to the injection molding machine press.

Before diving into CAD, we must define the goal: To create a void space (the cavity) that, when filled with molten polymer under pressure, produces a part that meets dimensional and aesthetic requirements, then ejects that part repeatedly with minimal cycle time. Before diving into CAD, we must define the

The Ultimate Injection Mold Design Guide: Principles, Best Practices, and Optimization

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Plastic shrinks onto the core. Without draft, the part will vacuum-seal to the mold or scratch during ejection.