Rotational Molding


Although rotational molding (commonly known as rotomolding) still represents a small fraction of the plastics industry, in recent years its many advantages have attracted increased attention from designers of plastic parts. Thanks to increased awareness of its many attractive features, rotomolding has been the fastest-growing process in the industry over the past decade. Please click on the links below to learn more about some of the distinct advantages that rotomolding has to offer.  

For its typical applications, the rotomolding process is simple. A premeasured amount of resin -- typically polyethylene, but  polycarbonate, nylon, polypropylene, and PVC are also commonly used -- is placed into a two-part mold. The mold is closed and begins to rotate on both the horizontal and vertical axes. The rotating mold is first cycled into an oven, where the resin reaches its melting point and begins to stick to the hot inside surface of the mold cavity. Once the resin has melted completely and formed a layer throughout the mold surface, the mold cycles into a cooling chamber. Here, the plastic is cooled until it has solidified into a hollow piece and is ready for removal. 

But so much more is possible! One of the most significant advantages of rotomolding is the number of value-added features that can be achieved in one step during the molding process. This includes application of colorful decorations, installation of metal inserts, and molding of design features that eliminate the need for costly secondary operations. With multi-piece tools, extraordinarily complex parts can be successfully molded. If you are not sure if your design is a good fit for the process, please contact us and we will be happy to advise on how to get the most out of the process at the least expense.   

Please click on the links below or the tabs to the right to learn more about some of rotomolding's most exciting advantages and features.