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GCSE Design and Technology · key term
A manufacturing process that continuously forces softened polymer through a shaped die to produce a length with a constant cross-section.
Used by AQA
Paper 1
Revise: Commercial processes for polymersA thermoplastic is a polymer that softens when heated and hardens when cooled. This makes it suitable for processes such as injection moulding and extrusion.
Distinguish a closed mould cavity from a die opening. Injection moulding produces separate mouldings; extrusion produces a continuous section.
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