Blow-molding apparatus for fabricating hollow articles from an o

Details Blow-molding apparatus for fabricating hollow articles from an o Blow-molding apparatus for fabricating hollow articles from an o

1992-02-26

1993-08-24

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

Including means to prepare parison

B29C 4904, B29C 4942

Patent

active

052383903

ABSTRACT:
Methods and apparatus for blow-molding hollow articles from open-ended tubular bodies of thermoplastics material include dimensionally expanding the open end of the tubular body to accomodate a blow pin plate of preselected dimension and/or geometry. The expanded open end of the tubular member will thus be closed by the blow pin plate. Subsequent introduction of pressurized fluid (e.g., air) into the tubular body through the blow pin plate will cause the tubular body to conform to the female cavity which envelops the same. In such a manner, hollow articles having relatively large sized and/or irregular shaped openings may be fabricated utilizing blow-molding techniques.

REFERENCES:
patent: 4518558 (1985-05-01), Anway et al.
patent: 4952134 (1990-08-01), Bartley et al.
patent: 5112561 (1992-05-01), Dickinson

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