Metal gasket and method of producing the same
AssigneesNippon Leakless Industry Co., Ltd., Sanshin Kogyo Kabushiki Kaisha
InventorsTunehiko Abe, Hiroyuki Nakano, Kazuaki Shiotani, Yoshiharu Takada
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Abstract
A method of producing a metal gasket includes steps of alkaline cleaning a metal plate, coating a non-rinse chemical for chromate conversion of surfaces of the metal plate and drying to form chromate films, coating an adhesive on the chromate films and drying or baking the adhesive to form adhesive layers, and coating rubber compound of a sheet-like or an amorphous mixed compound to a predetermined thickness on the adhesive layers and heating and vulcanizing the rubber compound to form rubber coated metal plate. A metal gasket manufactured in this manner has a high bonding power of the rubber layers to the metal plate to obtain an improved durability for long use.
Claims7
A method of producing a metal gasket comprising steps of coating a non-rinse chemical for chromate conversion on at least one surface of a metal plate and drying it in a first process, coating an adhesive thereon in a second process, and providing a rubber compound layer thereon and vulcanizing it in a third process, wherein said metal plate is a steel plate selected from a stainless steel sheet and a carbon steel sheet.
Dependencies are inferred from the claim text.