Centrifugal Casting Manufacturing Process

Centrifugal casting is a method of producing casting by pouring the molten metal into a rapidly rotating mould. The metal is thrown out towards the mould face by the centrifugal force under considerable pressure. The results in better mold filling and a casting with dencer grain structure, which is virtually free of porosity. 

Centrifugal castings are produced by pouring molten metal into the cavity of a rapidly rotating metal mold to whose walls the metal is thrown centrifugal force and where it solidifies in the form of a hollow casting. True centrifugal casting is the production of hollow casting by the centrifugal force alone and without the aid of a central core.

Molten metal is poured into the spinning mold cavity and the metal is held against the wall of the mold by centrifugal force. The speed of rotation and metal pouring rate vary with the alloy and size and shape being cast. 

The centrifugal casting machines used to spin the mould may have either a horizontal or a vertical axis of rotation and for short casting the rotational axis vertical. In the vertical axis machine the central hole will not be completely cylindrical, but will be slightly paraboloidal, which will need machining after the casting is made.