Rotational moulding

• Plastic beads are placed into a mould where they are then heated.
• While the plastic is being heated, the mould rotates both horizontally and vertically to coat the mould evenly.
• The mould is then cooled slowly and the product removed.
• Rotational moulding provides a uniform wall thickness around the entire product, except on corners where it is thicker.
• Smaller numbers of products can be produced as the tooling cost is lower than other processes.
• Products are a single part that can then be fitted to other parts if required.
• Rotational moulding can be a slow process as the mould needs to be coated and dried evenly.
• Some shapes and detailed features are difficult to incorporate in rotational moulding.
• Rotational moulding is used for producing balls, hollow plastic toys, road markers, and other products.
• Identifying rotationally moulded products can be done by looking for split lines, draft angles, and hollow objects.