Temperature adjusting and compressing in injection stretch blow

Details Temperature adjusting and compressing in injection stretch blow Temperature adjusting and compressing in injection stretch blow

1990-07-18

1992-06-23

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

264521, 264531, 264538, 264DIG33, 264DIG65, 425525, 425526, 425528, B29C 4906, B29C 4964

Patent

active

051241102

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.

REFERENCES:
patent: H671 (1989-09-01), Cho et al.
patent: 2985915 (1961-05-01), Winstead
patent: 3125619 (1967-03-01), Miller
patent: 4151249 (1979-04-01), Lee
patent: 4320083 (1982-03-01), Jakobsen
patent: 4880593 (1989-11-01), Strassheimer

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