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1. 发明专利

JPH0483975A METALLIC GASKET 失效
公开(公告)号：JPH0483975A
公开(公告)日：1992-03-17
申请号：JP19818390
申请日：1990-07-26
申请人： TAIHO KOGYO CO LTD , TOYOTA MOTOR CORP
发明人： YAMAGUCHI KENICHI , MIYAGI KIYOCHIKA , ICHIMI SHINJI , KITAMURA TAKESHI , KURAMOTO AKIO , KAWAI SHIRO
IPC分类号： F16J15/08
摘要： PURPOSE:To prevent the damage of a joint face due to a bead and to ensure stable sealing ability on the whole of a metallic gasket by increasing the thickness of a seal film on the surface on the protrusion part side of a bead to a value higher than that of a seal film on the surface on the recessed part side of the bead. CONSTITUTION:First seal films 16a and 16b of a vulcanized rubber layer formed of vulcanized fluorine rubber are formed on both surfaces of a base plate 10. The first seal films 16a and 16b are a seal film adhered on the surface on the protrusion part 15a side of a bead 15 and the surface on the recessed part 15b side thereof, and a thickness t1a of the surface on the protrusion part 15a side of the bead 15 is increased to a value higher than a thickness t1a of the back thereof. Second seal films 17a and 17b of a non-vulcanized or unvulcanized rubber layer formed on both surfaces of the base plate 10 are adhered to the first seal films 16a and 16b, respectively. A thickness t2a of the surface on the protrusion part 15a side of the bead 15 of the second seal films 17a and 17b is increased to a value higher than a thickness t2b of the back thereof. This constitution prevents the top surface of the protrusion part of the bead from being exposed to damage a joint face and ensures stable sealing ability.

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