Production method for permanent magnet and press device

Details Production method for permanent magnet and press device Production method for permanent magnet and press device

2008-05-13

2008-05-13

Sheehan, John P. (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

C148S101000, C148S104000

Reexamination Certificate

active

07371290

ABSTRACT:
To 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.

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Machine English Language Translation of Japanse Patent Document No. JP2001-226701A.
Supplementary European Search Report Dated Feb. 18, 2005 for EP 02 78 6003.

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