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.
Air trapped in the mold compresses as the plastic fills. Compressed air heats up, burning the plastic at the weld lines (diesel effect). A mold without vents will fail. injection mold design guide
This guide outlines the critical principles of injection mold design, from part geometry to the complex mechanical systems that make mass production possible. 1. Fundamental Design Principles (The "Molding Trinity") Before diving into CAD, we must define the