WHAT IS ROTOMOLDING?

Rotomolding, also known as rotational molding or rotocasting, is a manufacturing process that uses heat and rotation to create hollow plastic parts. It's a cost-effective way to make large, durable, and lightweight plastic products with a uniform wall thickness. The most common type of plastic used for this process is polyethylene.

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Some examples of rotomolded parts are kayaks, garbage bins, beer coolers, plastic carrying cases, traffic cones, fuel cells, water tanks.

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Rotomolding can also be done without heat using such material as two-part polyurethane. The advantage of cold rotomolding is the ease of access to the molds; they can be made of fiberglass, silicone and other easily formed materials. The cost of the material being cast is much more than heated rotomolding. wo-part polyurethane will be in the 10$/lb range whilst the hot polyethylene will be a in the 2$/lb range. The downside of hot rotomolding is the equipment cost. Molds will need to made of steel or aluminum. For complex parts, CNC mold fabrication will be required.

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