Invention Grant
- Patent Title: Rare-earth permanent magnet, method for manufacturing rare-earth permanent magnet and system for manufacturing rare-earth permanent magnet
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Application No.: US14384183Application Date: 2013-03-08
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Publication No.: US10014107B2Publication Date: 2018-07-03
- Inventor: Izumi Ozeki , Katsuya Kume , Toshiaki Okuno , Tomohiro Omure , Takashi Ozaki , Keisuke Taihaku , Takashi Yamamoto
- Applicant: NITTO DENKO CORPORATION
- Applicant Address: JP Ibaraki-shi, Osaka
- Assignee: NITTO DENKO CORPORATION
- Current Assignee: NITTO DENKO CORPORATION
- Current Assignee Address: JP Ibaraki-shi, Osaka
- Agency: Sughrue Mion, PLLC
- Priority: JP2012-054687 20120312
- International Application: PCT/JP2013/056434 WO 20130308
- International Announcement: WO2013/137135 WO 20130919
- Main IPC: B22F3/105
- IPC: B22F3/105 ; H01F41/02 ; C22C38/00 ; H01F1/057 ; H01F1/08 ; H01F7/02 ; B22F3/14

Abstract:
There are provided a rare-earth permanent magnet, and a method for manufacturing a rare-earth permanent magnet and a system for manufacturing a rare-earth permanent magnet, capable of achieving improved shape uniformity. Magnet material is milled into magnet powder, and the milled magnet powder is formed into a formed body 40. The formed body 40 is calcined and then sintered using a spark plasma sintering apparatus 45, so that a permanent magnet 1 is manufactured. A die unit 46 included in the spark plasma sintering apparatus 45 that performs spark plasma sintering at least includes in one direction an inflow hole 50 configured to receive inflow of part of the pressurized formed body.
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