Temperature adjusting and compressing in injection stretch blow molding for forming raised portions in the container produced
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United States of America Patent
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Jun 23, 1992
Grant Date -
N/A
app pub date -
Jul 18, 1990
filing date -
Jul 20, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for forming a hollow container from a hot closed-end parison includes the steps of injection molding a hot closed-end parison, adjusting the temperature of the hot closed-end parison by heating or cooling the hot closed-end parison in a predetermined location within a temperature adjusting pot in a temperature adjusting device. The parison is then blow-molded into a hollow container having a predetermined configuration after the parison has been adjusted in temperature. The temperature adjusting step uses at least either of the temperature adjusting pot or a temperature adjusting core in the temperature adjusting device so as to apply a pre-treatment, such as by clamping, to a portion of said hot closed-end parison for obtaining a predetermined concavo-convex pattern in the hollow container formed at the subsequent blowing step. Thus, a hollow container, a portion of which has the desired concavo-convex pattern, can be mass-produced simply and inexpensively.
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