Title:
METHOD FOR MANUFACTURING RARE-EARTH SINTERED MAGNET, AND MANUFACTURING DEVICE USED FOR SAID MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2016/047593
Kind Code:
A1
Abstract:
Provided are a manufacturing method and a manufacturing device for manufacturing individual rare-earth sintered magnet sintered body without transporting a mold into a sintering furnace.
The manufacturing method comprises: a powder feed step of feeding alloy powder to a mold having a side wall divided into two or more parts; a filling step of filling the mold with the alloy powder so as to fabricate a filled molding; an orienting step of applying a magnetic field to the filled molding so as to orient the alloy powder in the filled molding and fabricate an oriented filled molding; an extraction step of separating the side wall of the mold from the oriented filled molding and extracting the oriented filled molding from the mold; and a sintering step of sintering the extracted oriented filled molding. The method is characterized in that the filling step and the orienting step are performed at separate locations, wherein preferably, the orienting step includes applying a pulsed magnetic field and the mold is internally divided by a dividing plate into a plurality of cavities.
Inventors:
SAGAWA MASATO (JP)
HAYASHI SHINICHI (JP)
HAYASHI SHINICHI (JP)
Application Number:
PCT/JP2015/076676
Publication Date:
March 31, 2016
Filing Date:
September 18, 2015
Export Citation:
Assignee:
NDFEB CORP (JP)
International Classes:
H01F41/02; B22F1/05; B22F1/102; B22F3/00; B22F3/02; C22C38/00; H01F1/055; H01F1/057; H01F1/08
Foreign References:
JP2006019521A | 2006-01-19 | |||
JP2001323301A | 2001-11-22 | |||
JP2000096104A | 2000-04-04 | |||
JPH0997731A | 1997-04-08 | |||
JPH07153612A | 1995-06-16 | |||
JPS6134242B2 | 1986-08-06 | |||
JP2006019521A | 2006-01-19 | |||
JP4391980B2 | 2009-12-24 | |||
JP2731337B2 | 1998-03-25 | |||
JP2012060139A | 2012-03-22 | |||
JP2008294469A | 2008-12-04 | |||
JP2006097090A | 2006-04-13 |
Other References:
YOSHIO TAWARA; KEN OHASHI: "RARE EARTH PERMANENT MAGNET", 1999, MORIKITA SHUPPAN CO., LTD, pages: 60 - 63
See also references of EP 3200209A4
See also references of EP 3200209A4
Attorney, Agent or Firm:
MINORI Patent Profession Corporation (JP)
Patent business corporation Minori patent firm (JP)
Patent business corporation Minori patent firm (JP)
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