Two-Stage Ejection: Why One-Step Ejection Fails in Deep Cavity Molds скачать в хорошем качестве

Two-Stage Ejection: Why One-Step Ejection Fails in Deep Cavity Molds

Why does one-step ejection often fail for deep cavity plastic parts? After cooling, deep or thin-walled parts strongly grip the core. If ejected in a single stroke, this often leads to: • Drag marks • Part deformation • Cracking or surface whitening This animation demonstrates a two-stage ejection strategy: Stage 1: A short, slow ejection stroke to break vacuum and release grip. Stage 2: A controlled full ejection to safely remove the part. Key engineering considerations: • The first stroke is NOT meant to fully eject the part • Ejector stiffness and support length are critical • Ejection sequence must be locked with core-pull actions At Moldevo, we design demolding sequences based on physics — not trial-and-error. ======================== External Injection Mold Design & DFM Support for injection mold projects (EU / US / International). • Reduce mold trial failures before steel cutting • Avoid costly rework & delays • Clear 3D mold design with engineering notes Contact: moldevo.design@gmail.com ======================== #InjectionMolding #MoldDesign #TwoStageEjection #DFM #PlasticsEngineering #Moldflow #Moldevo