Title:
PRODUCTION OF CHECK VALVE
Document Type and Number:
Japanese Patent JP3228804
Kind Code:
B2
Abstract:
PURPOSE: To accurately form an outflow port when a check valve is formed of a soft elastic material such as rubber.
CONSTITUTION: The vulcanization molding of a check valve 1 is performed using an outer mold 7, a lower mold 8 and a middle mold 11. A thick-walled part is provided to the scheduled part of the outflow port 6 of the molded article 18 obtained by this molding. The middle mold 11 is extracted in such a state that the molded article 18 is left in the outer mold 7 and an underlay member is abutted to the rear surface of the thick-walled part 20 and a cutter is inserted in the molded article 18 to press the article 18 to form the outflow port 6 to the thick-walled part by the leading end of the cutter.
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| WO/2021/171632 | REPLACEABLE MOLD COMPONENT |
Inventors:
Daisuke Takeda
Junichi Konno
Junichi Konno
Application Number:
JP35096992A
Publication Date:
November 12, 2001
Filing Date:
December 04, 1992
Export Citation:
Assignee:
Fujikura Rubber Industry Co., Ltd.
International Classes:
B29C33/42; B29C69/00; B29D99/00; F16K15/14; B29L31/26; (IPC1-7): B29D31/00; B29C69/00; F16K15/14
Domestic Patent References:
| JP6342819A | ||||
| JP61294270A | ||||
| JP4300474A | ||||
| JP21662B2 |
Attorney, Agent or Firm:
Osamu Shimizu
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