Blow moulding method and apparatus

Details Blow moulding method and apparatus Blow moulding method and apparatus

B - Operations, Transporting

29

C

18/509

B29C 49/58 (2006.01) B29C 49/42 (2006.01) B29C 49/48 (2006.01) B29C 49/56 (2006.01) B29C 49/04 (2006.01)

Patent

CA 1161614

ABSTRACT OF THE DISCLOSURE The disclosure relates to a method and apparatus for blow moulding hollow plastic articles each having a relatively wide neck portion. The method includes the step of mechanically expanding an end portion of a tubular parison from which the article is to be moulded by means of a "stretcher" mechanism. The mechanism includes a plurality of parison engaging elements over which the parison is placed and which are movable radially outwardly to expand the end portion of the parison. A mandrel is then introduced into the expanded end portion of the parison and co-operates with the mould to form the neck of the article. Subsequently, the parison is expanded by internal air pressure to conform to the shape of the mould.

354818

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