In centrifugal casting, reinforcements and resin are deposited against the inside surface of a rotating mold. Centrifugal force holds the materials in place until the part is cured.
With centrifugal casting, the outside surface of the part, which is cured against the inside surface of the mold, represents the “finished” surface. The interior surface of centrifugally cast parts can be given an additional coating of “neat” or pure resin to improve surface appearance and provide additional chemical resistance in the part. Large diameter composite pipe and tanks are commercially produced by centrifugal casting.
Advantages of centrifugal casting include a finished exterior surface and containment of volatiles during processing. The primary limitations of centrifugal casting are the ability to spin molds of large size and relatively low productivity per tool.