異方性ボンド磁石の製造方法およびその製造装置

Japanese Patent JP5516723

B2

A production method is provided which can efficiently produce a case-integrated bonded magnet wherein a tubular bonded magnet and a tubular case are strongly pressure-bonded. The production method for a case-integrated bonded magnet according to the present invention comprises: a filling step that fills a tubular cavity with a magnet raw material, the magnet raw material including one or more types of rare-earth magnet powder and a thermosetting resin to be a binder; a heating/molding step that heats the magnet raw material to cause the thermosetting resin to be in softened state or molten state while compressively molding the magnet raw material to obtain a tubular compact; a discharging/press-fitting step that discharges the tubular compact from the tubular cavity while press-fitting the tubular compact into a metal tubular case having an inner peripheral surface coaxial with the tubular cavity; and a heat-curing step that heats the tubular compact with the tubular case to cure the thermosetting resin. The tubular compact press-fitted into the tubular case is thermally cured thereby causing the tubular compact to transform to a tubular bonded magnet, which expands due to heat more than expected. As a result, a case-integrated bonded magnet is obtained in which the tubular case and the tubular bonded magnet are strongly pressure-bonded.

Yoshinobu Honzo
Hironari Mitarai
Hiroshi Matsuoka
Makoto Kato
Ikuzo Okumura

JP2012509671A

June 11, 2014

April 05, 2011

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Aichi Steel Co., Ltd.

H01F41/02; H01F13/00; H02K15/03

JPH0897035A	1996-04-12
JPH08111337A	1996-04-30
JPH0661083A	1994-03-04

WO2005104337A1	2005-11-03
WO2006001304A1	2006-01-05

Morioka Masayuki
Hirofumi Ikawa
Yuji Hayakawa
Sansui International Patent Office

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