4365650
Descrição
Mapa Mental por Emma Chester, atualizado more than 1 year ago
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Criado por Emma Chester
mais de 10 anos atrás
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Blow Moulding
- Blow moulding is a commercial manufacturing
process that uses thermoplastics. Only hollow
products are made from blow moulding.
- Blow moulding typically produces products such as plastics
bottles and containers. The typical plastic used is PET
(polyethylene - terephthalate), PE ( polyethylene), PVC (polyvinyl
chloride) and PP (polypropylene) because they are strong and
flexible enough to keep liquid and fizzy drinks secure
- Advantages
- It makes hollow shapes easily
- Once it is set up, it is a rapid
manufacturing process
- Shapes that aren't circular can be produced
- It makes hollow shapes easily
- Disadvantages
- The moulds used to make
the product are expensive
- Shapes such as triangles are difficult to produce
- It is hard top create products with complex angles
- The moulds used to make
the product are expensive
- Process
- 1. Plastic granules are dropped into
the hopper and fed into the machine
- 2. The granules are pushed through
the heater by an Archimedes screw.
- 3. They melt and are pushed through the
end of the machine and into the mould
- 4. The mould clamps to the molten plastic
and cuts it free from the machine
- 5. Compressed air is blown into the molten plastic
- 6. A hollow shape is formed within the mould
- 7. The mould separates and the hollow shape is released
- 1. Plastic granules are dropped into
the hopper and fed into the machine
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