Blow moulding method and apparatus.

摘要

The disclosure relates to a method and apparatus for blow moulding hollow plastic articles each having at an end thereof, a main opening and secondary opening defined by an angled passageway. The method includes the step of laterally stretching a tubular parison (42) from which the article is to be moulded so as to receive a primary mandrel (46) for forming said opening and a secondary mandrel (48) for forming the passageway. Air is introduced into the parison through the secondary mandrel (48) to form the inner end portion (16b) of the passageway (16) while the parison (42) is expanded to conform to the shape of the mould (20, 22).