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1. 发明公开

EP0865051A1 METHOD OF MANUFACTURING BONDED MAGNETS OF RARE EARTH METAL, AND BONDED MAGNET OF RARE EARTH METAL 失效
标题翻译： SELTENERD-VERBUNDMAGNET-HERSTELLUNGSVERFAHREN IN SELTEN-ERD VERBUNDMAGNET
公开(公告)号：EP0865051A1
公开(公告)日：1998-09-16
申请号：EP97926267.2
申请日：1997-06-17
申请人： SEIKO EPSON CORPORATION
发明人： AKIOKA, Koji , SHIRAI, Hayato , IKUMA, Ken
IPC分类号： H01F41/02 , H01F1/08
CPC分类号： B22F3/227 , B22F3/20 , B22F2998/00 , C22C1/0441 , H01F1/0558 , H01F1/0578 , H01F1/059 , H01F41/0253 , H01F41/0266 , Y10S264/58 , Y10S428/90 , Y10T428/1355 , B22F3/22 , C22C32/0094
摘要： The present invention provides a method for manufacturing a rare-earth bonded magnet as follows: A compound 10 prepared by pelletizing a kneaded mixture of a rare-earth-bonded-magnet composition containing a rare-earth magnet powder, a binder resin and an antioxidant is stored in a hopper 91, and fed into a cylinder 3 through a feeding pipe 92; meanwhile, piston 81 is extended by driving an oil-hydraulic cylinder 8, and moved downward to compact the compound 10 fed into the cylinder 3 while gradually transferring the compound downward inside the cylinder 3; the cylinder 3 and a heating portion 41 are heated by heaters 5, and the compound 10 passing therethrough is heated to become a melted material 11; and the melted material 11 is continuously extruded out from a die 4 in the downward-vertical direction, and then cooled and solidified when passing through a tip portion 43, thus obtaining a molded body 12 of a rare-earth bonded magnet. According to this manner, a rare-earth bonded magnet exhibiting superior moldability, excellent magnetic properties and high dimensional precision can be obtained with a smaller amount of binder resin while taking advantage of the benefits of extrusion-molding.
摘要翻译：本发明提供一种稀土类粘结磁体的制造方法，其特征在于，将稀土类磁铁粉末，粘结剂树脂，抗氧化剂的稀土类粘结磁体组合物的混炼物造粒，储存在料斗91中，并通过进料管92供给到气缸3中; 同时，通过驱动油压缸8延伸活塞81，并向下移动以致压化进入气缸3的化合物10，同时逐渐地将化合物向下移动到气缸3内; 气缸3和加热部分41被加热器5加热，并且通过其的化合物10被加热成为熔化的材料11; 熔融材料11从模具4向下垂直方向连续地挤出，然后在通过顶端部43时冷却固化，得到稀土类粘结磁体的成型体12。按照这种方式，利用挤出成型的优点，可以用少量的粘合剂树脂获得显示出优异的成型性，优异的磁性能和高尺寸精度的稀土粘结磁体。

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