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GCSE Design and Technology · key term
A manufacturing process in which a heated polymer sheet is placed over a mould and pressed against it to take its shape.
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Revise: Principles of Plastic Moulding ProcessesPress moulding also begins with a polymer sheet that is heated until it can be shaped. The softened sheet is placed over a mould and pressed down against it so that it takes the mould’s shape.
A process in which a heated polymer sheet is placed over a mould and pressed onto it to take its shape.
Explain what shapes the plastic: compressed air in blow moulding, air removal in vacuum forming, direct pressing in press moulding, and a hydraulic press in compression moulding.
Keep press moulding and compression moulding distinct: press moulding starts with a heated sheet placed over a mould; compression moulding starts with polymer placed inside a heated mould cavity.
Distinguish the shaping force: blow moulding uses compressed air inside a tube; vacuum forming removes air beneath a sheet; press moulding uses direct pressure on a heated sheet.
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