| 摘要 |
PURPOSE:To manufacture a pole-anisotropic magnet of high performance which is cylindrical and anisotropic in the radial direction and has a plurality of opposite poles, by a method wherein a composition composed of a rare-earth intermetallic compound magnet powder and a resin binder is passed through a space formed by an extrusion mold having a pole-anisotropic magnetic field. CONSTITUTION:A ferromagnetic powder 12 is sent forward in a barrel 11 by a screw 10. Then, the compound passes through a space 15 formed by a shaft 13 and a molding die 19. This space 15 has a magnetic field of 6-25kOe applied. The magnetic field makes anisotropic the compound magnet powder flowing through the space. A cylindrical magnet 22 thus made anisotropic is cooled and hardened to be complete by a cooling die denoted by 21 and a water-cooled coil denoted by 20. |
