MANUFACTURING TECHNIQUES - HDPE RECYCING BIN
BLOW MOULDING
However, when it reaches the mould compressed air is also blown into the mould. This pushes the HDPE around the edges of the mould, forming a hollow shape, in this case the recycling bin.
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MANUFACTURING TECHNIQUES - HDPE RECYCING BIN BLOW MOULDING |
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| Injection Blow Moulding - Box Learning Exercise | |
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| THE MANUFACTURE OF A PLASTIC DUST / REFUSE BIN | |
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Blow
moulding follows the same stages of manufacture as injection moulding.
HDPE (high density polyethylene) is ideal for this typeof manufacturing
technology (see diagram below). The HDPE granules / powder is placed into
the hopper. It drops down on to a rotating thread and travels along its
distance. During this process the granules / powder is heated and becomes
fluid. However, when it reaches the mould compressed air is also blown into the mould. This pushes the HDPE around the edges of the mould, forming a hollow shape, in this case the recycling bin. |
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When the HDPE is cool it is removed from the mould and excess HDPE is trimmed away - leaving the bin. |
| INDUSTRIAL SCALE - INJECTION BLOW MOULDING | |
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| EXAMINATON QUESTION | |
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| CLICK HERE FOR RESISTANT MATERIALS INDEX PAGE | |
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