Surface multipolar rare earth-iron-boron rotor magnet and method of making
Rare earth-iron-boron magnet powder and process of producing same
Method and apparatus for producing compact of rare earth alloy powder and rare earth magnet
Method and apparatus for feeding magnetic powder and method for manufacturing magnet Patent #: 6432354
ApplicationNo. 10474546 filed on 12/02/2002
US Classes:148/103, Treatment in a magnetic field148/101, Permanent magnet148/104, Dust cores419/66Consolidation of powders
ExaminersPrimary: Sheehan, John P.
Attorney, Agent or Firm
Foreign Patent References
International ClassH01F 1/08
AbstractTo avoid various problems caused by remnant magnetization and produce an anisotropic bonded magnet at a reduced cost, a method for producing an anisotropic bonded magnet by feeding a magnetic powder (such as an HDDR powder) into the cavity of a press machine and compacting it is provided. A weak magnetic field is created as a static magnetic field in a space including the cavity by using a magnetic member that is steadily magnetized. The magnetic powder being transported into the cavity is aligned parallel to the direction of the weak magnetic field. Next, the magnetic powder is compressed in the cavity, thereby obtaining a compact.