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    Method and apparatus for producing a powder compact
    1.
    发明公开
    Method and apparatus for producing a powder compact 失效
    Verfahren und Vorrichtung zur Herstellung von einePresskörperaus Pulver。

    公开(公告)号：EP0599222A1

    公开(公告)日：1994-06-01

    申请号：EP93118664.7

    申请日：1993-11-19

    申请人： INTERMETALLICS CO., LTD.

    发明人： Sagawa, Masato, c/o Intermetallics Co., Ltd. ,  Nagata, Hiroshi, c/o Intermetallics Co., Ltd. ,  Itatani, Osamu, c/o Intermetallics Co., Ltd.

    IPC分类号： B30B15/02 ,  B30B11/02

    CPC分类号： B30B11/02 ,  B22F3/1233 ,  B30B11/008 ,  B30B15/024 ,  H01F41/0266

    摘要： The present invention relates to a method and an apparatus for producing a powder compact in which a recess (3) formed by die (d) and a lower punch (p1) inserted into said die is loaded with rubber mold (m) provided with a cavity (m') shaped according to the desired configuration of the compact, and subsequently, a powder is packed in the cavity of the rubber mold, and an upper punch (p2) is placed on die (d) to press the rubber mold with powder in the space formed by the die, the lower punch and the upper punch, thereby producing a powder compact. Because of the construction in which the upper punch is not inserted into the die but contacted at its bottom with the top of the die thereby carrying out the die pressing, the positioning of the indexed table does not have to be so accurate as in the prior art. The time for positioning is therefore shortened and the productivity is enhanced.

    摘要翻译： 本发明涉及一种制造粉末压块的方法和装置，其中由模具（d）形成的凹部（3）和插入所述模具中的下冲头（p1）装载有橡胶模具（m） （m'），然后将粉末填充在橡胶模具的空腔中，并将上冲头（p2）放置在模具（d）上以将橡胶模具按压 在由模具，下冲头和上冲头形成的空间中的粉末，从而产生粉末压块。 由于上冲头未插入模具的结构，而是在其底部与模具的顶部接触，从而进行压模，因此分度台的定位不一定如前所述那样准确 艺术。 因此缩短定位时间，提高生产效率。

    PRODUCTION METHOD FOR MAGNETIC-ANISOTROPY RARE-EARTH SINTERED MAGNET AND PRODUCTION DEVICE THEREFOR
    2.
    发明公开
    PRODUCTION METHOD FOR MAGNETIC-ANISOTROPY RARE-EARTH SINTERED MAGNET AND PRODUCTION DEVICE THEREFOR 有权
    HERSTELLUNGSVERFAHRENFÜRMAGNETISCH ANISOTROPEN SELTENERD-SINTERMAGNET

    公开(公告)号：EP1788594A1

    公开(公告)日：2007-05-23

    申请号：EP05765338.8

    申请日：2005-06-30

    申请人： INTERMETALLICS CO., LTD.

    发明人： Sagawa, Masato, c/o Intermetallics Co., Ltd. ,  Nagata, Hiroshi, c/o Intermetallics Co., Ltd. ,  Itatani, Osamu, c/o Intermetallics Co., Ltd.

    IPC分类号： H01F41/02 ,  B22F3/00 ,  B22F3/02 ,  B22F3/087 ,  C22C1/04 ,  C22C33/02

    CPC分类号： H01F41/0246 ,  B22F3/1021 ,  B22F2998/10 ,  C22C1/0433 ,  C22C33/0278 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  H01F1/0557 ,  H01F1/0577 ,  H01F41/0273 ,  B22F2201/10 ,  B22F9/08 ,  B22F3/004 ,  B22F2202/01 ,  B22F3/005 ,  B22F2202/05 ,  B22F9/04

    摘要： To improve the performance of a rare-earth magnet, it is effective to use a low-oxidized powder having a small grain size. One objective of the present invention is to provide a method for manufacturing a sintered rare-earth magnet having a magnetic anisotropy, in which a very active powder having a small grain size can be safely used in a low-oxidized state. Another objective is to provide a method capable of efficiently manufacturing products having various shapes. In a weighing and loading section 41 and a high-density loading section 42, a fine powder as a material of the sintered rare-earth magnet having a magnetic anisotropy is loaded into a mold until its density reaches a predetermined level. Then, in a magnetic orientation section 43, the fine powder is oriented by a pulsed magnetic field. Subsequently, the fine powder is not compressed but immediately sintered in a sintering furnace 44. The present method enables the mass-producing machine to be simple in its operation and its housing to be accordingly smaller, so that it will be possible to eliminate the danger of oxidization or burning of the powder, which has been a serious problem for a conventional method that uses a large-scale die-pressing machine. Furthermore, the manufacturing efficiency can be improved by using a multi-cavity mold for manufacturing a sintered rare-earth magnet having an industrially important shape, such as a plate magnet or an arched plate magnet.

    摘要翻译： 为了提高稀土类磁铁的性能，使用粒径小的低氧化物粉末是有效的。 本发明的一个目的是提供一种制造具有磁各向异性的稀土类烧结磁体的方法，其中可以以低氧化状态安全地使用具有小晶粒尺寸的非常活泼的粉末。 另一个目标是提供能够有效地制造具有各种形状的产品的方法。 在称重装载部41和高密度装载部42中，将作为具有磁各向异性的稀土类烧结磁体的材料的细粉末装载到模具中，直到其密度达到预定水平。 然后，在磁性取向部43中，细粉末通过脉冲磁场取向。 随后，细粉末不被压缩，但是在烧结炉44中立即烧结。本发明的方法使得批量生产机器的操作简单，并且壳体相应地更小，从而可以消除危险 的粉末的氧化或燃烧，这对于使用大型压模机的常规方法而言是严重的问题。 此外，通过使用多腔模具来制造具有工业上重要的形状的烧结稀土类磁体，例如板状磁铁或拱形磁体磁铁，可以提高制造效率。