Compression-bonded magnet with case and method for producing the same

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United States of America Patent

PATENT NO 9818521
SERIAL NO

15104224

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Abstract

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There is provided a compression-bonded magnet with a case, which can realize high magnetic properties, high corrosion resistance and high durability strength even at low cost. The compression-bonded magnet with a case is a compression-bonded magnet with a case 1, comprising: a compression-bonded magnet 2 comprising a rare earth magnet powder such as an isotropic Nd—Fe—B magnet powder and a resin binder of a thermosetting resin; a case 3 for inserting the compression-bonded magnet 2; and a sealing member 4, wherein the compression-bonded magnet 2 is formed by compression-molding a mixture comprising the rare earth magnet powder and the resin binder into a green compact and curing the resin binder contained in the green compact, the rare earth magnet powder is contained in a large amount with respect to the entire compression-bonded magnet (for example, in a volume ratio of 85% to 90%), the sealing member 4 is fixed at an insertion opening part 3a of the case 3, and the compression-bonded magnet 2 is hermetically sealed by the sealing member 4 and the case 3.

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Patent Owner(s)

Patent OwnerAddress
NTN CORPORATION3-6-32 NAKANOSHIMA KITA-KU OSAKA-SHI OSAKA 530-0005

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Harano, Takuji Mie, JP 10 43
Miyazaki, Shinji Mie, JP 62 1159
Nakajima, Tatsuo Aichi, JP 39 383

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