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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 10629345 B1

PDFFull Text
Date of Patent:
Apr. 21, 2020

Filed:

Sep. 18, 2015

Production method of rare earth sintered magnet and production device used in the production method

Applicant:

Ndfeb Corporation, Kyoto-shi, Kyoto, JP;

Inventors:

Masato Sagawa, Kyoto, JP;

Shinichi Hayashi, Kyoto, JP;

Assignee:

NDFEB CORPORATION, Kyoto-shi, Kyoto, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Brian D Walck

Int. Cl.
CPC ...
B22F 3/03 (2006.01); B22F 9/04 (2006.01); H01F 1/057 (2006.01); C22C 38/00 (2006.01); H01F 1/08 (2006.01); H01F 41/02 (2006.01); B30B 11/00 (2006.01); B30B 15/30 (2006.01); B30B 11/02 (2006.01); B30B 15/02 (2006.01); C22C 19/07 (2006.01); C22C 28/00 (2006.01); B22F 1/00 (2006.01); B22F 3/00 (2006.01); B22F 3/10 (2006.01); C22C 38/06 (2006.01); C22C 38/10 (2006.01); C22C 38/16 (2006.01); H01F 1/055 (2006.01);
U.S. Cl.
CPC ...
H01F 1/0577 (2013.01); B22F 1/0011 (2013.01); B22F 1/0062 (2013.01); B22F 3/003 (2013.01); B22F 3/004 (2013.01); B22F 3/03 (2013.01); B22F 3/1017 (2013.01); B22F 9/04 (2013.01); B30B 11/008 (2013.01); B30B 11/027 (2013.01); B30B 15/022 (2013.01); B30B 15/302 (2013.01); C22C 19/07 (2013.01); C22C 28/00 (2013.01); C22C 38/00 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/06 (2013.01); C22C 38/10 (2013.01); C22C 38/16 (2013.01); H01F 1/0551 (2013.01); H01F 1/0557 (2013.01); H01F 1/0573 (2013.01); H01F 1/086 (2013.01); H01F 41/0273 (2013.01); B22F 2009/044 (2013.01); B22F 2301/355 (2013.01); B22F 2302/45 (2013.01); B22F 2303/01 (2013.01); B22F 2304/10 (2013.01); B22F 2998/10 (2013.01); C22C 2202/02 (2013.01);
Abstract

There is provided a production method and a production device for producing each of the rare earth sintered magnet sintered bodies without carrying a mold in a sintering furnace. The method includes feeding an alloy powder into a mold having side walls divided into two or more sections; filling the alloy powder into the mold to prepare a filled molded-body; orienting the alloy powder in the filled molded-body by applying a magnetic field to the filled molded-body to prepare an oriented filled-molded-body; detaching the side walls of the mold from the oriented filled-molded-body and retrieving the oriented filled-molded-body from the mold; and sintering the retrieved oriented filled-molded-body. The filling step and the orienting step are performed at different locations. A pulsed magnetic field can be applied in the orienting step and inside of the mold can be partitioned into a plurality of cavities by partitions.

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