Method of molding a heat-resistant container

Details Method of molding a heat-resistant container Method of molding a heat-resistant container

1998-02-13

2000-06-27

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Direct application of fluid pressure

521530, 521903, 521904, 521906, B29C 4918

Patent

active

060803533

ABSTRACT:
A method of molding a heat-resistant container comprising a primary blow molding step, a primary heat treatment step, a secondary heat treatment step, and a secondary blow molding step. In the primary blow molding step a synthetic resin preform is blow-molded into a primary blow-molded article. In the primary heat treatment step, the primary blow-molded article is held in a heat treatment mold and subjected to heat treatment. The primary blow-molded article, removed from the mold, shrinks, and forms an intermediate molded article. In the secondary heat treatment step, the intermediate molded article is subjected to heat treatment outside the mold. At this time, almost no shrinkage occurs. In the secondary blow molding step, the intermediate molded article is blow molded within a final blow mold to form a final molded product.

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