Permanent magnet manufacturing method and press apparatus

Details Permanent magnet manufacturing method and press apparatus Permanent magnet manufacturing method and press apparatus

2008-03-18

2008-03-18

Sheehan, John P. (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

C148S101000, C419S012000

Reexamination Certificate

active

10489339

ABSTRACT:
An anisotropic bonded magnet is produced at a low cost by avoiding various problems caused by remanence. Also, the unit weight and density of a compact is increased by filling even a cavity, having no easily feedable shape, with a magnet powder just as intended. An anisotropic bonded magnet is produced by feeding the cavity of a press machine with a magnetic powder (e.g., an HDDR powder) and compacting it. After the magnetic powder has been positioned outside of the cavity, an oscillating magnetic field (e.g., an alternating magnetic field) is created in a space including the cavity. The magnetic powder is transported into the cavity while being aligned parallel to the oscillating direction of the oscillating magnetic field. Thereafter, the magnetic powder is compressed within the cavity to make a compact for an anisotropic bonded magnet.

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Complete English Language Translation of Japanese Patent Document 2001-226701.
Official Action for Korean Application No. 10-2003-7007385, dated Dec. 24, 2004.

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