公开(公告)号：US20180130581A1

公开(公告)日：2018-05-10

申请号：US15559652

申请日：2016-03-24

Applicant: NITTO DENKO CORPORATION

Inventor： Kenichi FUJIKAWA ,  Katsuya KUME ,  Kazuo OUCHI ,  Toshinobu HOSHINO ,  Masakazu MORIMOTO ,  Hirofumi ONO ,  Katsuyuki NAKABAYASHI ,  Miho YAMAGUCHI ,  Hiroshi MATSUO ,  Toshiaki OKUNO ,  Makoto FUJIHARA ,  Eiichi IMOTO ,  Hirofumi EBE ,  Tomohiro OMURE ,  Izumi OZEKI ,  Takashi YAMAMOTO ,  Yuki KATO ,  Tomoya MATSUDA ,  Shoichiro SAITO

IPC: H01F1/08 ,  H01F41/02 ,  H01F1/057 ,  H02K1/27 ,  H01F7/02

CPC classification number: H01F1/086 ,  H01F1/057 ,  H01F1/0577 ,  H01F7/02 ,  H01F41/0273 ,  H01F41/028 ,  H01F41/0293 ,  H02K1/27

Abstract: Provided is a method for producing a sintered body that forms a rare-earth permanent magnet, has a single sintered structure and an arbitrary shape, and has easy magnetization axis orientations of different directions applied to the magnet material particles in a plurality of arbitrary regions. This method forms a three-dimensional first molded article from a composite material formed by mixing a resin material and magnet material particles containing a rare-earth substance. The first molded article is then subjected to a deforming force and a second molded article is formed in which the orientation direction of the easy magnetization axis of the magnet material particles in at least the one section of the horizontal cross-section is changed to a direction which differs from the orientation direction of the first molded article. The second molded article is heated to a sintering temperature and kept at the temperature for a period of time.