Compression Moulding

• What is compression moulding used for

  To mould thermoset polymers e.g urea formaldehyde and melamine formaldehyde
• What are some products made by compression moulding

  Electrical light fittings, switches and electrical plugs (UF)

  Polymer plates, mugs and bowls of picnic sets, children's table SET (MF) 
• How is compresion moulding carried out

  1.'Slug' of pre-weighed thermoset polymer is inserted into pre-heated mould

  2.Moulds are closed, hydraulic pressure applied, ensures polymer takes shape of mould

  3.Mould remains closed, cross-linking takes place, thermoset 'cures'

  4.Moulding cured, machine opens, product removed

  5.Excess polymer(flash) removed