What is rotational moulding?
Rotational moulding (also know as rotomoulding) is a plastic moulding process which involves placing powdered plastic into a mould, which is then heated in an oven, and rotated several times (on two axis). As the heat melts the polymer powder inside the mould, layers start to build up, with even dispersion thanks to the rotation of the mould.
Once the process of heating and rotating is complete, the mould is cooled, opened, and the final part is removed.
What is rotational moulding used for?
Rotational moulding is particularly suited to large applications with hollow cavities, such as boats, canoes, tanks and vessels. Other applications include bins, playground equipment, road cones, helmets and planters.
What materials are used in rotational moulding?
Polyethylene (PE) and polypropylene (PP) are the most commonly used materials in the rotomoulding process. It is also possible to use polyvinyl chloride (PVC), nylon and polycarbonate (PC).