PROCESS FOR PRODUCING ANTIVIBRATION BUSH

WIPO Patent Application WO/2007/097070

A1

A process for producing an antivibration bush, in which even when the thickness of the outer tube is large, draw forming thereof is easy and a durability enhancement can be attained. There is provided a process for producing antivibration bush (10) having inner tube (12) and outer tube (14) and, interposed therebetween, rubbery elastic matter (16), which process, to facilitate draw forming even when the thickness of the outer tube is large, comprises making axially extending multiple incised grooves (24) on internal circumferential surface (15) of the outer tube (14), the incised grooves (24) distributed at equal intervals along the circumference; conducting vulcanization forming of the rubbery elastic matter (16) between the outer tube (14) furnished with the incised grooves (24) and the inner tube (12); and performing draw forming of the outer tube (14) after the vulcanization forming. In a preferred mode, with respect to the outer tube (14) wherein the external circumferential surface (19) thereof is in the form of straight tube and wherein the internal circumferential surface (15) is furnished with concave spherical surface (22) corresponding to convex spherical surface (20) of the inner tube (12), the incised grooves (24) are made on the internal circumferential surface (15).

JP2001193777

DAMPER FOR VEHICLE

SUZUKI KEN (JP)

PCT/JP2006/321774

August 30, 2007

October 31, 2006

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TOYO TIRE & RUBBER CO (JP)
SUZUKI KEN (JP)

F16F1/38; F16F15/08

JPH09504354A	1997-04-28
JP2003226239A	2003-08-12
JPH04109235U	1992-09-22
JPS54130156U	1979-09-10
JP2005344764A	2005-12-15
JPH11325145A	1999-11-26
JPH0669052U	1994-09-27

TSUTADA, Akiko et al. (Nissei Bingomachi Bldg. 7-10, Bingomachi 1-chome, Chuo-ku, Osaka-sh, Osaka 51, JP)

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