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Midstate Mold & Engineering

Precision Plastic Injection Molders

ejector pins

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Gates, Pins & Parting Lines: Designing Parts for Injection Molding

A lot of work goes into designing injection molding parts and the molds that produce them. While there are a thousand considerations to keep in mind with parts, molds, and manufacturers, today we’re going to focus on three: gates, pins, and parting lines. Designing parts and molds for those parts with placement for these features in mind produces better results and underlines why collaboration with your manufacturer earlier in the process can help avoid costly redesigns or inefficient production later.

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3 Considerations When Designing a Plastic Molding Ejection System

A clear injection mold showing the innerworkings and various components of an ejection system.

When plastic parts become stuck in a mold, it can result in part defects, breakage of mold components, manufacturing delays, and increased costs. That is why carefully designing an efficient ejection system is key to achieving optimal output and final quality products. To design a system that ejects parts easily, quickly, and consistently, the engineer should pay considerable attention to the ejection surface area, the location, and the ejection type. Let’s take a closer look at these three considerations when designing a plastic molding ejection system.

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