Method of blow molding and blow molding system

Details Method of blow molding and blow molding system Method of blow molding and blow molding system

1991-12-06

1994-09-13

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264531, 264541, 264520, 425503, 425526, 425529, B29C 4920, B29C 4942

Patent

active

053466659

ABSTRACT:
When a resin article having at least one thickened part is blow-molded, a parison is extruded and suspended between halves of a blow mold the inner surface of which defines the outer shape of the article to be molded. An expander panel is inserted into the space inside the parison, and is moved toward the part of the inner surface of the blow mold corresponding to the thickened part of the article to press thereagainst a part of the parison. Then the blow mold is closed and pressurized gas is blown into the parison.

REFERENCES:
patent: 3224038 (1965-12-01), Budesheim
patent: 3229006 (1966-01-01), Nohl
patent: 3278665 (1966-10-01), Harrison
patent: 3452391 (1969-07-01), Langecker
patent: 4518558 (1985-05-01), Anway et al.
patent: 4578028 (1986-03-01), Dirksing et al.

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