Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including application of internal fluid pressure to hollow...
Patent
1996-12-16
1999-01-26
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Including application of internal fluid pressure to hollow...
264504, 425536, B29C 4960
Patent
active
058634894
ABSTRACT:
A parison 4 of hot thermoplastics material is delivered into a mould 1 comprising two mould halves 2, 3 which are closed towards one another. A stress force is applied to the wall of the parison 4 either by a projection 5 extending from one of the mould halves 3 and/or by blowing air at a low pressure against the parison 4 through a blow pin 10. The parison 4 is then penetrated by the blow pin and high pressure air is blown through the blow pin 10 to inflate the parison 4 against the mould halves 2, 3. The blow pin 10 is withdrawn and a formed article such as a case is released from the mould after a preset time.
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Beirne Patrick
Flood Nicholas
Menza Limited
Timm Catherine
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