Production of hollow articles from thermoplastics
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United States of America Patent
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-
Mar 12, 1996
Grant Date -
N/A
app pub date -
Jan 11, 1994
filing date -
Jan 13, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
For the production of hollow articles from thermoplastics, such as wide-necked vessels, bottles and the like, an amorphous parison is injection-molded, warmed to a temperature above the glass transition temperature of the plastic, placed in a mold and stretch blow molded to give a hollow article. During the stretch blow molding, a liquid coolant, preferably water, is metered into the mold in such an amount that the temperature of the parison remains approximately constant or increases only insignificantly.
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