Method for sealing rocker cover
AssigneesMitsubishi Jidosha Kogyo Kabushiki Kaisha, Three Bond Co., Ltd.
InventorsTakeshi Kondo, Isamu Terasawa, Takafumi Shigemori, Yasunori Sakamoto
Life of this patent
Estimating the term…
Abstract
A sealing method wherein sealing agent composition comprises: (A) organopolysiloxane having at least two silicon atom bonded alkenyl groups in one molecule; (B) organohydrogen polysiloxane having at least two silicon atom bonded hydrogen atoms in one molecule; (C) fumed silica of a specified amount with respect to the components (A) and (B); and (D) an inorganic filler of a specified amount with respect to the components (A) and (B), in which the rocker and the cylinder block are pressed such that a hardness of the sealing agent in a cured state is 60 to 80 with a type A durometer of JIS K 6253 and a compression rate of the sealing agent becomes 20 to 40%.
Claims3
A sealing method of a rocker cover, in which a sealing agent is applied to a flange portion of a rocker cover, is cured, and then said flange portion is pressed to a cylinder block side, characterized in that sealing agent composition comprises:
- (A) organopolysiloxane having at least two silicon atom bonded alkenyl groups in one molecule;
- (B) organohydrogen polysiloxane having at least two silicon atom bonded hydrogen atoms in one molecule;
- (C) 10 to 30 parts by weight of fumed silica with respect to a total of 100 parts by weight of said component (A) and component (B);
- and
- (D) 50 to 100 parts by weight of an inorganic filler selected from calcium carbonate, magnesium carbonate, and quartz powder with respect to a total of 100 parts by weight of said component (A) and component (B), and
- said rocker cover and cylinder block are pressed such that a hardness of said sealing agent in a cured state is 60 to 80 with a type A durometer of JIS K 6253 and a compression rate of said sealing agent becomes 20 to 40%.
Dependencies are inferred from the claim text.