Injection moulding

• Injection moulding Process

  • Plastic granules are heated until they become fluid.
  • They are then forced into a mould the shape of the product being produced.
  • They are then quickly cooled and released from the mould.

  
• Why use injection moulding?

  • The products produced are extremely accurate
  • A large number of products can be produced quickly
  • All products made using the same mould will be identical
• Disadvantages of injection moulding

  • The tools and equipment are usually expensive to buy.
  • A high volume of products needs to be produced to make this cost effective.
• Uses of injection moulding

  • Bottle caps
  • Golf tees
  • Toys
  • Lego bricks
• Identifying injection moulded products

  • Shrinkage mark
  • Mould split lines
  • Ejection pin marks