Rotational moulding (or Rotomolding) is a process that is used to
manufacture plastic products. It involves the heating and melting
of a thermoplastic powder in a mould, the liquid polymer then coats
the mould surface to produce the desired shape. This process is
typically used to mould hollow parts, especially those with complex
and varied shapes not easily obtainable by other hollow-art
processes. It is a virtually shear-free and pressure-free process.
The wall thickness uniformity and part weight can be easily
maintained and there is very little waste of material due to scrap.
The moulds used are normally less expensive than the moulds used in
injection and blow moulding.