Blow-molding methods for fabricating hollow articles from an open-ended tubular body of thermoplastic material
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United States of America Patent
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May 12, 1992
Grant Date -
N/A
app pub date -
Oct 19, 1990
filing date -
Oct 19, 1990
priority date (Note) -
Expired
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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.
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