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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 11440091 B1

PDFFull Text
Date of Patent:
Sep. 13, 2022

Filed:

Jan. 18, 2019

Methods of producing bonded magnet and compound for bonded magnets

Applicant:

Nichia Corporation, Anan, JP;

Inventors:

Satoshi Yamanaka, Tokushima, JP;

Takayuki Yano, Anan, JP;

Assignee:

NICHIA CORPORATION, Anan, JP;

Attorney:

Hunton Andrews Kurth LLP

Primary Examiner:

Robert S Jones, Jr

Assistant Examiner:

Jiangtian Xu

Int. Cl.
CPC ...
B22F 1/00 (2022.01); B22F 1/102 (2022.01); H01F 1/059 (2006.01); H01F 1/055 (2006.01); B29B 7/00 (2006.01); B29B 7/46 (2006.01); B29B 9/06 (2006.01); B29B 9/12 (2006.01); B22F 3/20 (2006.01); B22F 3/22 (2006.01); C22C 33/02 (2006.01); B22F 9/04 (2006.01); B22F 1/16 (2022.01); B22F 1/052 (2022.01); B22F 1/148 (2022.01);
U.S. Cl.
CPC ...
B22F 1/102 (2022.01); H01F 1/059 (2013.01); H01F 1/0558 (2013.01); H01F 1/0596 (2013.01); B22F 1/052 (2022.01); B22F 1/148 (2022.01); B22F 1/16 (2022.01); B22F 3/227 (2013.01); B22F 2003/208 (2013.01); B22F 2009/047 (2013.01); B22F 2301/40 (2013.01); B22F 2304/10 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); B29B 7/002 (2013.01); B29B 7/46 (2013.01); B29B 9/06 (2013.01); B29B 9/12 (2013.01); C22C 33/0257 (2013.01); C22C 2202/02 (2013.01);
Abstract

Included is a method of preparing a compound for bonded magnets, the method including: coating a magnetic material having an average particle size of 10 μm or less with a thermosetting resin and a curing agent at a ratio of the equivalent weight of the curing agent to the equivalent weight of the thermosetting resin of 2 or higher and 10 or lower to obtain a coated material; granulating the coated material by compression to obtain a granulated product; milling the granulated product to obtain a milled product; and surface treating the milled product with a silane coupling agent to obtain a compound for bonded magnets, the method either including, between the granulation and the milling, heat curing the granulated product to obtain a cured product, or including, between the milling and the surface treatment, heat curing the milled product to obtain a cured product.

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