The rotational moulding process is relatively simple, consisting of loading the mould cavity with powdered polymer, heating the mould to around 300°C whilst rotating it on two axes to evenly distribute the polymer and finally cooling the mould to extract the product. Rotomoulding is a medium-volume process suitable for manufacturing complex parts of up to 200 per week from a single tool.

Depending upon the products application, various polymers are used including LLDPE, HDPE, XPLE, EVA, PVC, Nylon, Polycarbonate and Polypropylene. A polymer can be found to meet almost any requirement for impact resistance, temperature stability, chemical resistance, colour fastness, UV stability and durability.

The moulds are made from either steel cast aluminium or CNC machined aluminium and are relatively low in cost when compared to moulds for other processes such as blow or injection moulding.

Relative to their size, rotationally moulded parts can have thinner walls than items made by other processes. Low pressure processing eliminates stresses and promotes strength and stiffness which is a distinct advantage in larger components.

The surface finish and colour of rotomoulded parts can be tailored to suit the products requirements. Metal inserts and integrally moulded-in threads can also provide significant opportunities for cost down. Often this process is used to replace complex metal parts and fabrications with single piece mouldings. Graphics, logos and text can be moulded into the product in any combination of colours; being permanently embedded in the polymer, they will not deteriorate with age and cannot be scratched off.

Another benefit of the rotational moulding process is the production of foam-filled double-walled parts. This process is especially suited where products are required to have very high strength or good insulation properties, whilst still retaining their lightweight characteristics.

Rotomoulded products often provide a rugged lightweight replacement for more traditional materials. The versatility of the process allows for product sizes ranging from small ear syringes of plastisol to large 22,000 gallon vessels in polyethylene.

Recent developments in additive technology now allow us to produce mouldings of high performance for specialist applications such as V0 Fire Retardant, Anti-static/conductive, anti-microbial/bacterial.