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.
Formed Plastics, Inc.
207 Stonehinge Lane
Carle Place, NY 11514
Phone: (516) 334-2300
Fax: (516) 334-2679