Hitachi Metals, Ltd.

Sumitomo Special Metals Co., Ltd.

Neomax Co., Ltd.

Takashi Tajiri

Tsutomu Harada

Shuichi Okuyama

A press machineincludes a diewith a through holethat defines a cavity, a first press surfaceand a second press surfacefor pressing a magnetic powderloaded in the cavity, and magnetic field generating means for applying an aligning magnetic field to the magnetic powderin the cavity. At least one of the first and second press surfacesandhas a region made of a material having a Vickers hardness that is higher than 200 but equal to or lower than 450. In pressing the powder under the aligning magnetic field, the press machineminimizes the disturbance in the orientation of the powder.

Press machine and method for producing magnet

Press and magnet manufacturing method

The present invention provides a powder compacting apparatus including: a die having a through hole forming a cavity; a first punch and a second punch for pressing a rare-earth alloy magnetic powder filled in the cavity; and a magnetic field generator for applying an orientation magnetic field parallel to a pressing direction through the rare-earth alloy magnetic powder in the cavity, wherein at least one of the first and second punches and has a curved pressing surface, and the pressing surface is given a shape such as to suppress the movement of particles of the rare-earth alloy magnetic powder along the pressing surface during the pressing step.

Growing community of inventors

Osaka, Japan

Takashi Tajiri