Why a Large Ejector Plate Was Used to Drive Side Actions in an Automotive Mold скачать в хорошем качестве

Why a Large Ejector Plate Was Used to Drive Side Actions in an Automotive Mold

Motion-based mold design is not about animation — it is about validating engineering decisions before steel cutting. This video explains why a large ejector plate was used to drive multiple side slides in an automotive injection mold. The part is an automotive component with high requirements for surface finish and dimensional accuracy. The mold is designed as a 1×1 configuration using a two-point valve gate hot runner system. Because multiple internal undercuts are present, a conventional slide arrangement would require complex mechanisms and a larger mold footprint. Instead, a large ejector plate is used to drive multiple side slides simultaneously. This approach provides several advantages: • More compact mold layout • Simpler overall structure • Reduced mold size • Lower tooling cost • Easier maintenance During mold opening, hydraulic cylinders drive the ejector plate forward by approximately 60 mm. Seven side slides move together with the ejector plate to release the undercuts. Six push blocks supported by nitrogen springs move with the initial stroke and then stop, while the ejector plate continues its motion to eject the part. Engineering note: For large molds like this, perimeter support blocks should always be added to resist injection pressure and lateral forces. Without sufficient support, mold displacement may occur, leading to flash and surface quality issues. Production stability is engineered — not assumed. — Moldevo –––––––––––––––––––––– External Injection Mold Design · DFM · Moldflow Analysis for complex tooling projects (EU / US / International) Technical inquiries: moldevo.design@gmail.com #InjectionMolding #MoldDesign #ToolingEngineering #AutomotiveMold