Gravity Die Casting 

In PERMANENT MOULD CASTING, molten metal is poured under gravity into a metal mould where it remains until it solidifies. The mould is then opened and the casting is removed. The mould is often made of cast iron, but low carbon steels and die steels can also be used. The dies can be of relatively simple construction produced in two halves.

Metal or sand cores can be used for making internal details. Shapes are relatively simple with simple coring and fairly uniform wall thickness. The process can be mechanised. Improved tolerances, surface finish, and mechanical properties over sand casting can be achieved.