What is Rotational Moulding

Rotational Moulding involves a heated hollow mould which is filled with a charge or shot weight of material. It is then slowly rotated (usually around two perpendicular axes), causing the softened material to disperse and stick to the walls of the mould. In order to maintain even thickness throughout the part, the mould continues to rotate at all times during the heating phase and to avoid sagging or deformation also during the cooling phase.

Advantages

• Low-cost tooling
• Consistent wall thickness
• High durability, stability and strength
• Appearance

Disadvantages

• High cycle times
• Material options
• High cost of raw material
• Low repeat-ability
• High labour costs