Casting: Centrifugal casting
Centrifugal casting is mostly used by brass and bronze foundries. The process is of little significance for processing aluminium alloys. The molten aluminium is poured into a mould (permanent or sand) rotating at between 1500 and 5000 rpm. As a result of the centrifugal forces, the molten metal is pressed against the inside wall of the mould. Rotation is also carried out during the solidification phase.
Centrifugal casting produces a very dense microstructure, although segregation can occur. The process enables relatively thin wall thicknesses and sharp contours to be cast. The process is used mainly to produce rotationally symmetrical parts such as bushes, tubes, rings or squirrel cage rotors, etc.