Ishikawajima-harima Heavy Industries Co., Ltd.

Mitsushi Maeyama

Shigeru Takabe

Yoshiyuki Miyagi

Tatsuya Fujii

Masahiro Makita

Masayoshi Sasaki

A method for manufacturing a supercharger rotor by casting a profile portion of a supercharger rotor and a shaft penetrating the same, having the steps of: first cutting a left and right helical cross portion on a surface of the shaft connected to the profile portion, wherein the cross portion includes a right handed helical groove and a left handed helical groove, and these grooves cross each other; and casting the profile portion around the shaft in die-casting. In this way, a plurality of profile portion divided metal molds surround a profile portion and end metal molds surround both rotor ends. A helical core is attached to one end mold to pass through the profile portion. A rotor-shaped cavity forms inside the molds. Hot metal is pressurized, injected and solidified in the cavity, and the end mold having the helical core is pulled out by rotation along a helical line.

Method and apparatus for manufacturing supercharger rotor

A plurality of profile portion divided metal molds surround a profile portion of a supercharger rotor to allow division. A pair of end metal molds and surround both ends of the rotor. A helical core is attached to one end metal mold so as to be helically passed through the profile portion of the rotor. A rotor-shaped cavity is formed inside by the profile portion divided metal molds, and the end metal molds. Hot metal is pressurized, and injected and solidified in the cavity. Then, the end metal mold having the helical core is pulled out by being rotated along a helical line.

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Chiba, Japan

Mitsushi Maeyama