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This trial version can use only a part of item.Function of Major PartsYou will learn about the names and functions of major parts used for an ejection system.A push back pin and a coil spring are used for regular molds, whereas a push back pin and a gas spring are sometimes used for large size molds.This figure illustrates an example of a large mold. Ejector Stopper (Stroke End Pin) A block that stops an ejector plate from going forward [ stop pin]Sprue Lock PinsA pin has the edge of which is undercut t