| 简介 |
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. |
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