Injection Mold Design Guide Jun 2026

How the plastic enters and how the air leaves determines part quality.

Welcome to the definitive . Whether you are a mold engineer, a product designer, or a procurement manager, understanding the following 12 pillars of mold design will save you hundreds of thousands of dollars and months of frustration.

This guide synthesizes knowledge from industry practices, focusing on principles, proper component selection, and advanced technologies that shape modern mold design. injection mold design guide

To avoid sink marks on the opposite surface, ribs should be 40% to 60% of the nominal wall thickness.

Sharp corners concentrate mechanical stress and restrict fluid plastic flow, leading to premature part failure and premature mold wear. How the plastic enters and how the air

Thicker sections cool slower and shrink inward, creating surface dents.

The foundation of a successful mold begins with the part itself. Before designing the mold, the plastic part must be evaluated for manufacturability. This section covers essential guidelines for plastic part design. Thicker sections cool slower and shrink inward, creating

should have filleted bases and be connected to ribs for structural integrity. Radii & Fillets