A shallow depression on the surface of an injection molded part due to collapse of the surface as the molten plastic material cools and contract.
A depression on the surface of moulded part caused by differential shrinkage.
An imperfection, a depression in the surface of a molded material where it has retracted from the mould. A shallow depression or dimple on the surface of an injection molded part due to collapsing of the surface following local internal shrinkage after the gate seals. May also be an incipient short shot.
A shallow surface cavity that forms during cooling. It is usually indicative of under packing prior to gate freezing and is corrected by a higher molding pressure.
a depression on the surface of a moulding, particularly where there is a rib on the other side. It is caused by contraction of the plastic in the mould.
