EJECTION SYSTEM

The thermoplastic material after cooling  sticks on core  or projected portion of the mould due to shrinkage. As per the injection moulding machine design, the ejection rod is provided in the moving side of the machine. It means that the ejection system in the mould is incorporated in the moving half of mold and the core as projection portion of the mould is generally fitted in moving side of the mould. due to some mechanism like link bolt,knockout rod movement, the ejector plate moves forward and this makes the ejector pins or system to eject the components.

1- ejection system consist of following :
2- Types of ejection like pins,step pins, valve pins, stripper plate etc.
3- Ejector plate assembly consist of two plate,i.e, ejector plate and ejector back plate
4- Ejector grid place for the ejector assembly
5- Sprue puller for pulling the sprue from sprue bush button




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