Hidaka Seiki Kabushiki Kaisha

Du Pont Toray Company Limited

Toyota Tsusho Matex Corporation

Hirose Paper Mfg Co., Ltd.

Shotaro Hidaka

Mamoru Yamada

Hideaki Machida

Gen Ueta

Naruaki Takahashi

Takaharu Kuno

A polyimide fiber paper-manufacturing method is provided that includes a short fiber-preparing step in which shaved short fibers of a non-thermoplastic polyimide are prepared, and a provisionally-bonded paper-forming step in which the short fibers are mixed with water-soluble polymers which are a material having a decomposition temperature lower than a glass transition point of polyimide, and subjected to wet-papermaking to form provisionally-bonded paper.

Polyimide fiber sheet

The method of manufacturing a heat exchanging fin is able to restrict forming wrinkles and ring marks in the heat exchanging fin. The method comprises the steps of: forming dome sections having diameters greater than the diameters of collared-through-holes and which are projected from one side face of a thin plate, and a plurality of circular recesses having diameters greater than of the dome sections, each of which encloses one of the dome sections, the circular recesses being depressed toward the opposite face of the thin plate; forming the dome sections and the recesses into truncated cone-shaped sections in a plurality of steps; forming a through-hole in each of the truncated cone-shaped sections; forming edges of the through-holes into collars; and forming a flange at a front end of each of the collars.

Method of manufacturing heat exchanging fin and die set for manufacturing the same

Growing community of inventors

Tokyo, Japan

Shotaro Hidaka