公开(公告)号：US06969244B2

公开(公告)日：2005-11-29

申请号：US10218460

申请日：2002-08-15

申请人： Futoshi Kuniyoshi ,  Koki Tokuhara ,  Kunitoshi Kanno ,  Hitoshi Morimoto ,  Tomoiku Ohtani ,  Ryoji Ono

发明人： Futoshi Kuniyoshi ,  Koki Tokuhara ,  Kunitoshi Kanno ,  Hitoshi Morimoto ,  Tomoiku Ohtani ,  Ryoji Ono

IPC分类号： B22F3/00 ,  B30B15/30 ,  H01F41/02

CPC分类号： B30B15/304 ,  B22F3/004 ,  B22F2999/00 ,  H01F41/0266 ,  Y10S425/815 ,  B22F2201/10 ,  B22F2202/01

摘要： The present invention aims to prevent heating and ignition of a material powder of a rare-earth alloy while reducing the oxygen content thereof so as to improve the magnetic properties of the rare-earth magnet. A rare-earth alloy powder is compacted by using a powder compacting apparatus including: an airtight container capable of storing a rare-earth alloy powder therein; an airtight feeder box moved between a powder-filling position and a retracted position; and an airtight powder supply device capable of supplying the rare-earth alloy powder from the container into the feeder box without exposing the rare-earth alloy powder to the atmospheric air.

摘要翻译： 本发明旨在防止稀土合金的材料粉末的加热和点火，同时减少其含氧量，从而提高稀土磁体的磁性能。 稀土合金粉末通过使用粉末压制装置压实，所述粉末压制装置包括：能够在其中储存稀土合金粉末的气密容器; 一个气密的进料盒在粉料填充位置和缩回位置之间移动; 以及能够将稀土类合金粉末从容器供给到给料箱中而不将稀土类合金粉末暴露于大气中的气密粉末供给装置。

公开(公告)号：US06511631B2

公开(公告)日：2003-01-28

申请号：US09838546

申请日：2001-04-20

申请人： Futoshi Kuniyoshi ,  Koki Tokuhara ,  Kunitoshi Kanno ,  Hitoshi Morimoto ,  Tomoiku Ohtani ,  Ryoji Ono

发明人： Futoshi Kuniyoshi ,  Koki Tokuhara ,  Kunitoshi Kanno ,  Hitoshi Morimoto ,  Tomoiku Ohtani ,  Ryoji Ono

IPC分类号： B22F300

CPC分类号： B30B15/304 ,  B22F3/004 ,  B22F2999/00 ,  H01F41/0266 ,  Y10S425/815 ,  B22F2201/10 ,  B22F2202/01

摘要： The present invention aims to prevent heating and ignition of a material powder of a rare-earth alloy while reducing the oxygen content thereof so as to improve the magnetic properties of the rare-earth magnet. A rare-earth alloy powder is compacted by using a powder compacting apparatus including: an airtight container capable of storing a rare-earth alloy powder therein; an airtight feeder box moved between a powder-filling position and a retracted position; and an airtight powder supply device capable of supplying the rare-earth alloy powder from the container into the feeder box without exposing the rare-earth alloy powder to the atmospheric air.

公开(公告)号：US06696015B2

公开(公告)日：2004-02-24

申请号：US09846783

申请日：2001-05-02

申请人： Koki Tokuhara ,  Akiyasu Oota ,  Tsuyoshi Wada ,  Katsumi Okayama ,  Tomoiku Ohtani ,  Kunitoshi Kanno

发明人： Koki Tokuhara ,  Akiyasu Oota ,  Tsuyoshi Wada ,  Katsumi Okayama ,  Tomoiku Ohtani ,  Kunitoshi Kanno

IPC分类号： B22F312

CPC分类号： H01F41/0253 ,  B22F3/1007 ,  B22F2998/00 ,  F27B9/028 ,  F27B21/00 ,  F27D5/0068 ,  F27D2001/1891 ,  H01F1/0577 ,  C22C1/0441

摘要： The method for producing a rare-earth sintered magnet of the present invention includes the steps of: compacting alloy powder for the rare-earth sintered magnet to form a green compact; loading the green compact into a case having a structure restricting a path through which gas flows between the outside and inside of the case, and placing a gas absorbent at least near the path; and sintering the green compact by heating the case including the green compact inside in a decompressed atmosphere.

摘要翻译： 本发明的稀土类烧结磁体的制造方法包括以下步骤：将稀土类烧结磁体的合金粉末压制成生坯; 将生坯压装成具有限制气体在壳体的外部和内部之间流动的路径的结构的壳体，并且至少在路径附近放置气体吸收剂; 并且通过在减压气氛中将包括生坯的壳体加热到内部来烧结生坯。