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7 Cards in this Set
- Front
- Back
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what is one advantage of blow moulding?
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intricate shapes can be formed, Can produce hollow shapes with thin walls - thus reducing material costs |
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State one use of blow moulding in the making industry? |
plastic bottles, and containers of all sizes and shapes. Eg fizzy drink bottles and shampoo bottles |
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What is hot air used for in the process of blow moulding?
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It heats up the the parison making it flexible so that it can expand and take the shape of the mould. |
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State one disavantage of blow moulding
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High initial set up costs as mould is expensive to develop and produce. |
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State two polymer that could be used in the blow moulding industry. |
HDPE, LDPE, PET, PP, PS, PVC |
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What is a parison? |
The parison is a tube-like piece of plastic with a hole in one end through which compressed air can pass |
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What is a preform? |
A Preform is usually an injection moulded part that will be formed into a bottle shape, the preform allows the thread of a bottle to be prepared in advance before you blow mould. |
