Title:
MOLDING METHOD AND COOLING DEVICE FOR SYNTHETIC RESIN-MADE PRESSURE BOTTLE BODY
Document Type and Number:
Japanese Patent JP3200617
Kind Code:
B2
Abstract:
PURPOSE: To realize a blow time shorter than that in a prior art to enhance a productivity and to mold a pressure bottle body free from an occurrence of crazing or bottom cracking.
CONSTITUTION: In molding a synthetic resin-made biaxially-oriented blow-molded bottle body 1 having a bottom part of a big-foot petaloid form, the bottle body 1 is blow molded in a blow time of 3 sec or less. Immediately after the bottle body is released, a bottle body bottom part 3 is forcibly cooled until a temperature of a center part 6 of the bottom part 3 is lowered to at least 70 degrees. In this manner, the short cooling of the bottom part 3 is compensated, whereby the irregular deformation of the bottom center part 6 is prevented. Furthermore, the bottom part 3 superior in pressure strength and mechanical strength is molded with the bottom center part having a sufficient height.
Inventors:
Takao Iizuka
Mamoru Oshida
Makoto Takada
Mamoru Oshida
Makoto Takada
Application Number:
JP21453392A
Publication Date:
August 20, 2001
Filing Date:
July 20, 1992
Export Citation:
Assignee:
Yoshino Industry Co., Ltd.
International Classes:
B29C49/08; B29C49/42; B29C49/64; B29C49/66; B29C49/78; B29C71/02; B29C35/16; B29C49/06; B29L22/00; (IPC1-7): B29C49/08; B29C49/42; B29C49/64; B29C49/66
Domestic Patent References:
| JP61291121A | ||||
| JP6233622A |
Attorney, Agent or Firm:
Kazutoyo Watanabe
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