SOLUTION

Centrifugal casting: It is commonly carried out in a permanent mold that is rotated during the solidification of a casing. Impurities are collected in the center of the casing.

True centrifugal casting method is used to produce cast iron and steel pipes. The centrifuge casting method is used for casting articles of symmetrical shape about a horizontal axis. These articles have a fine-grained structure. In true centrifugal casting is the mold is rotated about its own axis without using a central core. If the mold is partially filled, a hole appears along the center of rotation of the casting, the diameter of the hole determined by the amount of metal used. The weight of casting produced to that of metal poured approaches 1:1.