Mazda Motor Corporation

Masaya Minato

Tsutomu Shigenaga

Ken Sakamoto

Masaaki Akamine

Hiroshi Kubota

Yushi Matsuda

Takahiro Tanaka

Hiroyuki Koga

Chiaki Asano

Yuki Nakanishi

Kazuhiro Furuta

Akira Andou

Tomohiro Nagano

The present disclosure keeps a topcoat filmfrom having a dentin a portion of its surface corresponding to a pinholeof a resin molded product. A method of the present disclosure includes: applying an undercoat material to a resin molded productto form an undercoat film; applying a topcoat material to a surface of the undercoat filmto form a topcoat film; and thermally curing the topcoat film. A coating material that contains a base resin having a larger volume expansion coefficient than the resin molded productand a granular filler having a smaller volume expansion coefficient than the base resin and a number-average particle size of 2 μm or more to 12 μm or less is used as the undercoat material.

Method for coating resin molded product

A method of applying heat shield material to form a heat shield layer on a crown surface of a piston of an engine is provided. The method includes the steps of disposing a dispenser that linearly discharges the heat shield material toward the crown surface, and moving an applied position of the heat shield material with respect to the crown surface in a circumferential direction of the crown surface, while discharging the heat shield material from the dispenser toward the crown surface.

Method of applying heat shield material to piston

A coating composition for forming a coating film including particles and a resin binder is so configured that a content of the particles in the coating film is more than 30 vol%, the coating composition includes the particles, a raw resin of the resin binder, and a solvent, and a ratio V/D is 2.5 or less, where V is a volatilization rate (g/m&#xb7;s) of the solvent, and D is a diffusion coefficient (10m/s) of the solvent in the coating composition.

Coating composition, coating film forming method, and engine component

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Hiroshima, Japan

Masaya Minato