Method of Manufacturing Metal Gasket

a gasket and metal technology, applied in the field of metal gasket manufacturing, can solve the problems of minute roughness turning into cracks, and achieve the effects of reducing temperature, preventing cracks and roughness in the hem portion, and increasing hardness
US20080047636A1Inactive Publication Date: 2008-02-28NIPPON LEAKLESS IND CO LTD +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
NIPPON LEAKLESS IND CO LTD
Publication Date
2008-02-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

Method of manufacturing a metal gasket including a base plate having at least fluid passage holes and circular beads surrounding the fluid passage holes, the base plate being formed by providing a rubber coating layer on a surface of a metal plate with a base coat and an adhesive interposed therebetween. A metal plate having low-temperature age-hardening characteristics is used as the metal plate of the base plate. After the base coat is applied to the metal plate and dried at a temperature lower than a low aging temperature of the metal plate, press-working of the circular beads is performed on the metal plate. Thereafter, the metal plate is age-hardened while burning the base coat at the low aging temperature of the metal plate. A metal gasket having excellent durability and circular beads which are hardly broken even when crushed, is obtained.
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Description

TECHNICAL FIELD

[0001] The present invention relates to a method of manufacturing a metal gasket, which is particularly suitable for manufacturing a cylinder head metal gasket of an internal combustion engine. BACKGROUND ART

[0002] As a metal gasket, there has been known, for example, a cylinder head metal gasket including at least one base plate, as a single base plate or a plurality of stacked base plates. Specifically, the base plate is formed by providing a rubber coating layer on a surface of a stainless steel plate as a metal plate. Moreover, the base plate has cylinder holes as fluid passage holes formed so as to correspond to respective cylinder bores in a cylinder block of an internal combustion engine, and circular beads which are formed around the respective cylinder holes and each of which has a sectional shape like that of an angle bar.

[0003] The cylinder head metal gasket is inserted between deck planes of the cylinder block and the cylinder head of the internal combu...

Claims

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