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METHOD FOR MANUFACTURING RARE-EARTH SINTERED MAGNET, AND MANUFACTURING DEVICE USED FOR SAID MANUFAC 发明申请

2023-08-01 4180 1112K 0

专利信息

申请日期 2025-06-25 申请号 EP15793661
公开(公告)号 EP3200209A1 公开(公告)日 2017-08-02
公开国别 EP 申请人省市代码 全国
申请人 NDFEB Corporation
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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