Toyota Jidosha Kabushiki Kaisha

Honda Giken Kogyo Kabushiki Kaisha

Art Metal Manufacturing Co. Ltd.

Art Kinzoku Kogyo Kabushiki Kaisha

Tatsuo Sakakibara

Yoshio Fuwa

Tadashi Donomoto

Nobuhiro Miura

Mototsugu Koyama

Takeo Arai

Keisuke Ban

Noriaki Miyake

Composite material and process for its production

An engine piston is formed with a top crown surface and a top ring groove. An upper annular land surface is defined between the top ring groove and the edge of the top crown surface. The upper annular land surface and the side walls of the top ring groove are defined by a part of the piston which is formed of a matrix metal reinforced with inorganic fibers. The proportion of the inorganic fibers by volume in the reinforced part of the piston may optionally be approximately between 2% and 10%. A method for making such a piston includes forming a mass of inorganic fiber into an approximately cylindrical shape, placing it against the edge of the bottom surface of a hollow cylindrical lower mold, pouring molten metal into the lower mold to cover the inorganic fiber, sliding an upper mold into the lower mold and pressurizing the molten metal to infiltrate it between the inorganic fibers until complete solidification, removing the solidified mass of metal and entrapped inorganic fiber from the lower mold, and machining it to form a piston, with the fiber reinforced parts defining the upper ring groove side walls and the upper land surface.

Piston with local inorganic fiber reinforcement and method of making the

A method for producing a fiber reinforced composite body, wherein a shaped body of inorganic fiber or a sintered body of metal or ceramic material is placed in a metal mold, and a melt of a metal alloy as a matrix is caused to be penetrated or impregnated into the shaped body by a high pressure solidification casting method so that the matrix may perfectly fill in the voids or pores of the shaped body and solidify to be a desired composite body.

Method for production of fiber-reinforced composite material

Growing community of inventors

Ueda, Japan

Tatsuo Sakakibara