The process of Rotational Molding is a very unique process.  Heat is used to melt and fuse plastic resin in a closed mold.  Unlike most other plastic processes, no pressure is involved.  The three-stage process includes loading the resin in the mold, heating and fusing the resin, and finally, cooling and unloading the mold.  After the charged mold is moved into an oven, the mold is rotated upon two axes at low speed.  As heat penetrates the mold, the resin adheres to the mold's inner surface until it is completely fused.  The mold is then cooled by air or water spray or a combination of both, while still rotating, thus lowering the temperature in a gradual manner.  The mold is opened, finished part removed and mold recharged for the next cycle.  A variety of materials is available.  The most widely used is polyethylene.  Other potential materials include plastisols, nylon, fluoropolymers, polycarbonate, polypropylene, polyurethane, elastomers, etc. 

 With the Rotational Molding process, parts can be molded economically in a variety of shapes and sizes, many of them would be impossible to produce by any other process.  Common products include, but not limited to, storage tanks, shipping drums and receptacles, material handling bins, fuel tanks and housings.  Consumer products include furniture, toys and surfboards.  The possibilities are endless!