Mitsubishi Jukogyo Kabushiki Kaisha

Central Motor Wheel Co., Ltd.

Sanken Sangyo Co., Ltd.

Ken Fujita

Kazuzo Katayama

Susumu Izaki

Fumito Inuzuka

Nahoko Hanaoka

Matoshi Teranishi

Hirotoshi Yabumoto

A vortex chamber includes an outer circumference wall, a container, an annular shoal portion provided between the container and the outer circumference wall so as to encircle the outer circumference of the container, and a dam portion protruding upward from the upper surface of the outer circumference of the container so as to partition the container from the shoal portion. An undried nonferrous metal block is fed into the shoal portion, the block having such a size that is not completely submerged into the molten metal in the shoal portion. The fed nonferrous metal block is gradually melted to have a reduced volume of small pieces and particles of nonferrous metal, which are re-circulated in the shoal portion, flown over the dam portion, and dropped into the container, thereby forming a vortex in the container in which remaining small pieces and particles submerged into the molten metal are melted.

Nonferrous metal melting furnace and method for melting nonferrous metal

An impeller of a centrifugal fluid-type rotary machine includes impeller blades each having a concave and convex surface of which the shape is formed of parallel generatrices inclined with respect to a rotary shaft by an angle defined for each impeller blade. A method of manufacturing the impeller includes inclining a main plate material of the impeller with respect to a plane of a table of a machine tool by a desired angle, fixedly mounting the plate on the table after placing the plate on a rotation indexable jig, controlling three axial positions of the plate in the right and left, front and rear and upper and lower direction by a three-axis controller and cutting out the main plate or side plate by a cutting tool to integrally form the impeller blades on the plate.

Impeller of centrifugal fluid-type rotary machine and manufacturing

Impeller of centrifugal fluid-type rotary machine

Growing community of inventors

Hiroshima, Japan

Ken Fujita