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  1. Exhibitions
  2. Output
  3. Blow moulding

Blow moulding

Process:   An extruded tube is pinched at one end and expanded with hot air to fill the cavity of a two part metal mould.  Once cooled the piece is removed from the mould and the pinch point is trimmed.

Introduced:   1881 for use with cellulose nitrate.

Plastics:   Commonly high density polyethylene and polyethylene terephthalate.

Marks:   A pinch line.

Tooling cost:   Relatively high.

Production volume:   High.

Uses:   Hollow articles, usually with openings of smaller diameter than the body, such as bottles or containers.

Front view of a Sqezy bottle showing the printed design.
Front view of a Cadbury's Highlights jar showing the waisted shape of the jar.
Front view of a lamp showing the simple bear shape.

Thermoforming >

Exhibitions

Endurance Designated Design Why plastics? Friend and faux Beside the sea MyPlastic reissued Being me: plastics and the body Output
Blow moulding Thermoforming Casting 3D printing (SLS) Injection moulding Extrusion Resin transfer moulding Calendering Vacuum forming Rotational moulding Compression moulding
Revolution: environmentally conscious design in plastics See through Polyphonic: music through plastics Spotlight on... 2 Picnic Flora Design for childhood Precious plastics? Provocative plastics? National identity Threads: plastics wearing well Is that plastic? Polymorphia 10 Most Wanted MyPlastic/ Beastly designs Plastics for gold Work, rest and play with plastics You can do it with plastics… Nature's plastic Substitute Spotlight on… Encore! Winning with plastics The plastics invasion Eat in or take out Ways of seeing plastics

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