In a production cycle of the high pressure die casting process, the casting cavity is filled with liquid metal and the metal solidifies forming the manufactured component. During solidification, the metal part contracts, "shrinking" onto various features of the die cavity, and is held in place in the die by those contact pressures and forces developed during solidification. When the dies open, the cavity design is typically such that the casting "sticks" to a certain die half, not allowing the part to simply fall out of the cavity when the dies open. To control when the part is removed, ejection pins are added to the die which activate by moving forward and pushing the cast component out of the die cavity, either to fall into a bin or to be handled by robot or machine operator.
展开▼
