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Method for producing a rare earth sintered magnet used in manufacturing and production 发明授权

2022-06-06 2690 1896K 0

专利信息

申请日期 2025-02-22 申请号 JP2015549890
公开(公告)号 JP6280137B2 公开(公告)日 2018-02-14
公开国别 JP 申请人省市代码 全国
申请人 NDFEB株式会社
简介 Provided is a production method and a production device for producing each of the rare earth sintered magnet sintered bodies without carrying a mold in a sintering furnace. The production method comprises a powder feeding step of feeding an alloy powder into a mold having side walls divided into two or more sections; a filling step of filling the alloy powder into the mold to prepare a filled molded-body; an orienting step of orienting the alloy powder in the filled molded-body by applying a magnetic field to the filled molded-body to prepare an oriented filled-molded-body; a retrieving step of detaching the side walls of the mold from the oriented filled-molded-body and retrieving the oriented filled-molded-body from the mold; and a sintering step of sintering the retrieved oriented filled-molded-body, wherein the filling step and the orienting step are performed at different locations, and it is preferred that a pulsed magnetic field is applied in the orienting step and inside of the mold is partitioned into a plurality of cavities by partitions.


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