Apparatus for blow molding a hollow plastic article having a rel

Details Apparatus for blow molding a hollow plastic article having a rel Apparatus for blow molding a hollow plastic article having a rel

1981-03-30

1982-06-15

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Forming baffle, bottleneck, or handle

264531, 264533, 425531, 425535, 425537, B29C 1707

Patent

active

043348521

ABSTRACT:
The disclosure relates to a method and apparatus for 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, and introducing into the expanded end portion of the parison a mandrel which cooperates with the mould to form the neck of the article. Subsequently, the parison is expanded by internal air pressure to form the remainder of the article. Movable mould inserts for relieving pressure around the neck of the article are also disclosed.

REFERENCES:
patent: 3032809 (1962-05-01), Willard
patent: 3371376 (1968-03-01), Fischer et al.
patent: 3733384 (1973-05-01), Gerlovich et al.
patent: 4092392 (1978-05-01), Dunbeker
patent: 4176153 (1979-11-01), Weiler et al.

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