As the animation shows, rotational moulding (also known as roto moulding) is extremely simple yet affordable and highly effective. It also offers real advantages over injection and blow moulding which include:
Rotational moulding is an extremely versatile process for the manufacture of a vast range of plastic products and components – it’s why we’ve used it to bring our customers’ plastic products to life for more than 40 years.
Find out more about out Contract Moulding.
The clever bit
Many of the customers we produce bespoke products for visit our factory to see how the process works.
Polyethylene powder is measured out by an operative and placed into the mould which is clamped shut and moved into an oven chamber. The tool is heated up to between 220°C and 400°C while rotating on two axes at speed. As the rotating tool heats up, the powder begins to melt and adheres to the inside of the mould, progressively building up a layer over the inner surface.
Once the plastic is completely fused to the surface, the mould is then automatically withdrawn from the oven and cooled. After approximately 45 minutes to 1 hour, the plastic product is removed from the mould and allowed to cool further. For products of a technical nature, we normally use a wooden cooling jig at this stage as it helps ensure the product doesn’t shrink too much and assists with maintaining critical features.