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- Last Updated on Friday, 13 May 2011 15:02
- Written by Super User
| Internal Gas - Gas Cooling | |
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Diagram. |
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Gas Cooling - can be added to internal gas moulding with objectives of:- To reduce cycle time To improve dimensional stability To improve inner gas channel surface finish Gas cool is based on the PEP process. The mould cavity is filled and sometimes partially packed with plastic. Gas is injected to apply further packing pressure, and then sequencing the opening of one or more shut-off valves to enable the expulsion of molten plastic to one or more secondary cavities. The secondary cavity is then pierced with a piercing pin and chilled gas is then allowed to flow through the gas channel(s) to cool the plastic. Gas is then vented to atmosphere before opening the mould and ejecting the part.
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