| 摘要 |
A method ofblow-moulding comprises forming a parison (44) of a thermoplastics material, closing a mould (20) around the parison, injecting compressed gas into the parison through a blowing hole (45) to form a moulded product that is shaped according to the shape of the mould, then deforming a seal forming portion (49) of the moulded product with a heated sealing tool (50) to seal the blowing hole. The seal forming portion (49) preferably comprises a tubular collar (46) that surrounds the blowing hole. <IMAGE> |
