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Title:
METHOD FOR PRODUCING RESIN JOINT BOOT
Document Type and Number:
WIPO Patent Application WO/2006/054338
Kind Code:
A1
Abstract:
A method for producing a resin joint boot capable of being fixed to an outer case having noncircular outer circumferential profile, comprising a step for injection molding a parison (40) consisting of a first portion (42) having a plurality of protrusions (24) at the inner circumferential part and corresponding to a large diameter side fixing section (14), a second portion (44) corresponding to a small diameter side fixing section (12), and a third portion (46) for coupling them using an injection molding die (50), and a step for blow molding a bellows section (16) by covering the outer circumference of the third portion with a blow molding die (85). The injection molding die (50) is provided with a core (55) for forming a material removing hole (25) in the outer surface of the protrusion (24) such that the core can be advanced to a cavity (56) for forming the protrusion or retracted therefrom. The parison is injection molded while the core is kept projecting into the cavity and the core is retracted from the cavity at the time of mold releasing.

Inventors:
Ohshita, Takenori c/o Toyo Tire & Rubber Co. Ltd. (17-18, Edobori 1-chome, Nishi-k, Osaka-shi Osaka 02, 55000, JP)
Saito, Katsushi c/o Toyo Tire & Rubber Co. Ltd. (17-18, Edobori 1-chome, Nishi-k, Osaka-shi Osaka 02, 55000, JP)
Imazu, Eiichi c/o Toyo Tire & Rubber Co. Ltd. (17-18, Edobori 1-chome, Nishi-k, Osaka-shi Osaka 02, 55000, JP)
Application Number:
PCT/JP2004/017088
Publication Date:
May 26, 2006
Filing Date:
November 17, 2004
Export Citation:
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Assignee:
TOYO TIRE & RUBBER CO., LTD. (17-18, Edobori 1-chome Nishi-k, Osaka-shi Osaka 02, 55000, JP)
Ohshita, Takenori c/o Toyo Tire & Rubber Co. Ltd. (17-18, Edobori 1-chome, Nishi-k, Osaka-shi Osaka 02, 55000, JP)
Saito, Katsushi c/o Toyo Tire & Rubber Co. Ltd. (17-18, Edobori 1-chome, Nishi-k, Osaka-shi Osaka 02, 55000, JP)
Imazu, Eiichi c/o Toyo Tire & Rubber Co. Ltd. (17-18, Edobori 1-chome, Nishi-k, Osaka-shi Osaka 02, 55000, JP)
International Classes:
B29C49/06; B29C45/44; B29C49/64; F16D3/84; F16J3/04; F16J15/52; B29L31/26
Foreign References:
JPH10325464A1998-12-08
EP0915264A21999-05-12
JP2003222155A2003-08-08
JPH01250673A1989-10-05
JPS6425110U1989-02-10
Attorney, Agent or Firm:
Tsutada, Akiko (9th Floor, Nissei Bingomachi Bldg. 7-10, Bingomachi 1-chome, Chuo-k, Osaka-shi Osaka 51, 54100, JP)
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