Loading the plastic material (in micronised form) into the mould:

Powder of a thermoplastic polymer is loaded into a mould. Before each cycle, the amount of powder is calculated according to the desired thickness. Rotational moulds are made in two or more removable parts. Rotational moulds are hollow, thin-walled and have good thermal and mechanical properties to withstand production cycles. Aluminium is often the preferred material for rotational moulding.