Blow molding isoften used to produce plastic vessels and containers. 4 Rotational Molding R otational molding is the last molding process we'll talk about. In this type of molding, a ground plastic powder is heated in a rotating mold until it becomes molten. As the mold rotates, the molten plastic uniformly coats the inside of the mold cavity. When it is cooled, a hollow finished part is formed.
Rotational molding is used to produce plastic tanks.