Rotomolding
Rotomolding is a molding process in which hollow plastic goods are formed using high temperature and low pressure. It is a versatile process that can be used to make a vast number of shapes at a low cost. If desired, chemicals can also be added to make the plastic resistant to corrosion, static, or flame. Like all plastic products, rotomolded goods can be made in an assortment of colors.
Many different types of plastics can be used to make rotomolded plastics. Most rotationally molded plastics, however, are made of polyethylene. Other plastics used during rotomolding include nylon, Polyvinyl chloride (PVC), and polypropylene.
From start to finish, the rotomolding process takes anywhere from 15 to 90 minutes. The process includes four different stages: filling of molds, heating, cooling, and removal of the plastic part from the mold. Many different types of products can be made using the rotomolding process, including bottles, kayaks, hot tubs, trash bins, and helmets.