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    • 26. 发明公开
    • METHOD OF PRODUCING SINTERED BODY
    • VERFAHREN ZUR HERSTELLUNG GESINTERTERKÖRPER
    • EP1040887A1
    • 2000-10-04
    • EP99970345.7
    • 1999-10-08
    • INJEX CORPORATION
    • SAKATA, Masaaki, Injex CorporationSHIMODAIRA, Kenichi, Injex Corporation
    • B22F3/20
    • B22F3/227B22F3/20B22F3/22B22F2003/145B22F2998/00B22F2998/10B22F2999/00B22F3/1021B22F3/10B22F2207/15
    • In a method of manufacturing a sintered body of the present invention, a feed stock including metal powder, a binder, and an organic material having a melting point lower than that of the binder is extrusion molded by using an extruder 1, so that an extruded body having a desired shape (cross-sectional shape) and dimensions is manufactured. In this method, the temperature of an extrusion side die 52 of an extrusion die 5 is lower than the melting point of the binder and higher than that of the organic material. Next, a debinding treatment (treatment for removing binder) of the obtained extruded body is performed. The debinding treatment is separately performed in a first step in a low temperature region and a second step in a temperature region higher than that in the first step. Subsequently, an obtained debound body is sintered by baking in a sintering furnace, whereby the sintered body (metal product) is manufactured.
    • 在本发明的烧结体的制造方法中,使用挤出机1将包含金属粉末,粘合剂和熔点低于粘合剂的有机材料的原料挤出成型, 制造具有期望形状(截面形状)和尺寸的本体。 在该方法中,挤出模具5的挤出侧模52的温度低于粘合剂的熔点,高于有机材料的熔点。 接着,进行所得挤出体的脱脂处理(除去粘合剂的处理)。 脱脂处理分别在低温区域的第一步骤和比第一步骤高的温度区域的第二步骤中进行。 随后,通过在烧结炉中烧结将所获得的脱料体烧结,从而制造烧结体(金属制品)。
    • 28. 发明公开
    • METHOD OF MANUFACTURING BONDED MAGNETS OF RARE EARTH METAL, AND BONDED MAGNET OF RARE EARTH METAL
    • SELTENERD-VERBUNDMAGNET-HERSTELLUNGSVERFAHREN IN SELTEN-ERD VERBUNDMAGNET
    • EP0865051A1
    • 1998-09-16
    • EP97926267.2
    • 1997-06-17
    • SEIKO EPSON CORPORATION
    • AKIOKA, KojiSHIRAI, HayatoIKUMA, Ken
    • H01F41/02H01F1/08
    • B22F3/227B22F3/20B22F2998/00C22C1/0441H01F1/0558H01F1/0578H01F1/059H01F41/0253H01F41/0266Y10S264/58Y10S428/90Y10T428/1355B22F3/22C22C32/0094
    • 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.
    • 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。