Rotational Molders

Rotational Molders

Rotational molders use the rotational molding or rotomolding process to create hollow plastic parts. This process is the easiest way to produce large, hollow plastic parts such as oil tanks, mostly because rotomolded parts inherently feature an even wall thickness and strong corners.

During the rotomolding process, rotational molders generally use powdered or liquid plastics from the polyethylene family. Some of these plastic materials include cross-linked polyethylene, high density polyethylene, or linear low density polyethylene.

Rotational molders create plastic items for a number of industries and applications, including specialty tanks for food service, livestock feeders, instrument housings, oil tanks, and highway construction markers, as well as consumer products such as kayaks, child seats, planter pots, tool carts, and truck liners.

Rotational molds are significantly less expensive than other molds, such as those used in injection molding. In addition, many parts can be produced in one piece through rotational molding, resulting in very little scrap and reduced assembly costs. The disadvantages of rotational molding are that the process is slower than injection molding and certain features such as ribs may be difficult to mold.