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Title:
METHOD OF MANUFACTURING ANISOTROPIC BOND MAGNET, MAGNETIC CIRCUIT, AND ANISOTROPIC BOND MAGNET
Document Type and Number:
Japanese Patent JP2010199222
Kind Code:
A
Abstract:

To provide a method of manufacturing an anisotropic bond magnet, a magnetic circuit, and an anisotropic bond magnet.

The method of manufacturing the anisotropic bond magnet includes: step S1 of preparing a first mixture composed of a first magnetic powder having a particle size of >20 μm and ≤150 μm, a thermosetting resin the addition amount in the anisotropic bond of which is <2.0 wt.%, and a first additive, and a second mixture composed of a second magnetic powder having a particle size of ≥1 mμ and ≤20 mμ and a second additive; step S2 of preparing a mixed compound composed of the first mixture and the second mixture; step S3 of filling the mixed compound to a molding tool and compression-molding the mixed compound while setting the magnetic field strength at ends of the molding tool to ≥0.8 T and the magnetic field strength at the center thereof to be higher than the magnetic field strength at the ends by 5% or more; and curing step S4 of heating the resulting compound in an inert gas or nitrogen gas atmosphere.


Inventors:
NAKAMURA YOSHIFUMI
Application Number:
JP2009041005A
Publication Date:
September 09, 2010
Filing Date:
February 24, 2009
Export Citation:
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Assignee:
SEIKO INSTR INC
International Classes:
H01F41/02; B22F1/00; B22F3/00; B22F3/02; B22F3/24; H01F1/08; H01F7/02
Domestic Patent References:
JP2004296873A2004-10-21
JPH02109304A1990-04-23
JP2006041138A2006-02-09
JPH04142014A1992-05-15
JP2001023843A2001-01-26
JPH0349547A1991-03-04
JP2004296874A2004-10-21
JPS56111204A1981-09-02
JPH04157712A1992-05-29
JP2004296873A2004-10-21
JPH02109304A1990-04-23
JP2006041138A2006-02-09
JPH04142014A1992-05-15
JP2001023843A2001-01-26
JPH0349547A1991-03-04
Foreign References:
WO2003085684A12003-10-16
WO2003085684A12003-10-16
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi