Rotational moulding

• rotational moulding Process

  • 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.

  
• Why use rotational moulding?

  • It 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.
• Disadvantages of rotational moulding

  • It can be quite a slow process as the mould needs to be coated and dried evenly.
  • Some shapes and detailed features are difficult to incorporate.
• Uses of rotational moulding

  • Balls
  • Hollow plastic toys
  • Road markers
• Identifying rotationally moulded products

  • Split lines
  • Draft angles
  • Hollow objects