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GCSE Design and Technology · key term
A manufacturing process that inflates softened plastic inside a mould to produce a hollow product.
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Component 1
Revise: Principles of Plastic Moulding ProcessesBlow moulding produces hollow plastic products, such as bottles. A hot, softened plastic tube is enclosed in a mould. This tube is called a parison.
A process that makes a hollow plastic product by inflating a softened plastic tube inside a mould.
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.
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.
When explaining suitability, connect the process to the product: blow moulding creates the hollow body of a bottle.
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