Compression Moulding (thermosetting plastics)

Question 1

Define compression moulding

Answer 1

Compression moulding compresses thermoset powder in a mould to create heat-resistant products.

Question 2

What products does compression moulding produce?

Answer 2

Strong, heat resistant high-volume insulators in non-complex shapes such as electrical plugs, sockets, casings, switches, insulators, buttons, car bumpers.

Question 3

Briefly explain the three step process of compression moulding

Answer 3

1. Thermoset resin powder is placed in the bottom die of a split mould. Sometimes the plastic charge is first compacted into a shape called a preform.
2. The top die comes down, compresses and heats the thermoset powder into shape in the mould.
3. The thermoset plastic sets (cures) in the mould, the mould is opened, and the product is ejected.