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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10867729 B1

PDFFull Text
Date of Patent:
Dec. 15, 2020

Filed:

Mar. 24, 2016

Method for producing sintered body that forms rare-earth permanent magnet and has non-parallel easy magnetization axis orientation

Applicant:

Nitto Denko Corporation, Osaka, JP;

Inventors:

Kenichi Fujikawa, Osaka, JP;

Katsuya Kume, Osaka, JP;

Kazuo Ouchi, Osaka, JP;

Toshinobu Hoshino, Osaka, JP;

Masakazu Morimoto, Osaka, JP;

Hirofumi Ono, Osaka, JP;

Katsuyuki Nakabayashi, Osaka, JP;

Miho Yamaguchi, Osaka, JP;

Hiroshi Matsuo, Osaka, JP;

Toshiaki Okuno, Osaka, JP;

Makoto Fujihara, Osaka, JP;

Eiichi Imoto, Osaka, JP;

Hirofumi Ebe, Osaka, JP;

Tomohiro Omure, Osaka, JP;

Izumi Ozeki, Osaka, JP;

Takashi Yamamoto, Osaka, JP;

Yuki Kato, Osaka, JP;

Tomoya Matsuda, Osaka, JP;

Shoichiro Saito, Osaka, JP;

Assignee:

NITTO DENKO CORPORATION, Ibaraki, JP;

Attorney:

Hauptman Ham, LLP

Primary Examiner:

Anthony J Zimmer

Assistant Examiner:

Ricardo D Morales

Int. Cl.
CPC ...
H01F 1/08 (2006.01); H01F 7/02 (2006.01); H02K 1/27 (2006.01); H01F 41/02 (2006.01); H01F 1/057 (2006.01);
U.S. Cl.
CPC ...
H01F 1/086 (2013.01); H01F 1/057 (2013.01); H01F 7/02 (2013.01); H01F 41/0273 (2013.01); H01F 41/0293 (2013.01); H02K 1/27 (2013.01); H01F 1/0577 (2013.01); H01F 41/028 (2013.01);
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.

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