Rotational Molding is a method of casting hollow plastic parts with few restrictions regarding size or complexity. Plastic powder is fused in a hollow female mold by rotating it simultaneously in two directions while heating it in an oven. Once the plastic is fused, the mold is cooled to solidify the plastic and the part is removed by splitting the mold.
Very stable parts – no molded in stresses
Low tooling cost for large parts
Suited for low volume production
Can produce complex part geometries
Can mold in metal inserts and graphics