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    • 6. 发明专利
    • Magnetic field injection molding apparatus
    • 磁场注射成型设备
    • JP2010240956A
    • 2010-10-28
    • JP2009091295
    • 2009-04-03
    • Tdk CorpTdk株式会社
    • GOTO MASASHIOHATA OSAMUTODA YOSHIHIROKUDO SHUNICHIAIDA TOMOHIKO
    • B29C45/26B29C45/00B29C45/03B29C45/17H01F41/02
    • PROBLEM TO BE SOLVED: To provide a magnetic field injection molding apparatus capable of manufacturing a curved molded product having an improved magnetic characteristic. SOLUTION: The magnetic field injection molding apparatus comprises: a first mold which has a convex curved surface and is made of ferromagnetic material; a second mold which has a concave curved surface confronted by the convex curved surface while leaving an interval from each other and is made of ferromagnetic material; a third mold which has a projection part interposed between the convex curved surface and the concave curved surface and is made of nonmagnetic material; a magnetic field generating means which generates a magnetic field in a cavity surrounded by the first mold, second mold and third mold; and a magnetic material supply means which supplies a magnetic material into the cavity. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供一种能够制造具有改善的磁特性的弯曲模制产品的磁场注射成型装置。 磁场注射成型装置包括:具有凸曲面并由铁磁材料制成的第一模具; 第二模具具有由凸曲面面对的凹曲面,同时彼此间隔并由铁磁材料制成; 第三模具,其具有插入在所述凸曲面和所述凹曲面之间的突起部,并且由非磁性材料制成; 磁场产生装置,其在由第一模具,第二模具和第三模具围绕的空腔中产生磁场; 以及将磁性材料供应到空腔中的磁性材料供给装置。 版权所有(C)2011,JPO&INPIT
    • 7. 发明专利
    • Method and apparatus for manufacturing ferrite magnet
    • 制造铁磁体的方法和装置
    • JP2010238977A
    • 2010-10-21
    • JP2009086383
    • 2009-03-31
    • Tdk CorpTdk株式会社
    • TODA YOSHIHIROGOTO MASASHIAIDA TOMOHIKOKUDO SHUNICHI
    • H01F41/02B29C45/00B29C45/26H01F1/11
    • PROBLEM TO BE SOLVED: To provide a method of manufacturing a ferrite magnet having less disorder of magnetic orientation and less deformation in outward shape, and to provide a manufacturing apparatus for manufacturing the ferrite magnet. SOLUTION: The method of manufacturing the ferrite magnet includes a process of obtaining a preform by injection molding in a cavity of a metal mold applied with a magnetic field and a process of baking the preform. The cavity 12 has a nearly arcuate cross section of predetermined thickness in a radial direction and a rectangular vertical cross section in an axial direction. A gate 60 for feeding a material in a molten state to the cavity 12 is provided at the center part of the nearly arcuate shape of the cross section of the cavity 12 and at one first axial end 12a of the vertical cross section of the cavity 12. An overflow part 70 into which a material in the molten state which overflows from the cavity 12 flows is provided at the other second axial end 12b of the vertical section of the cavity 12 and at a position facing the gate 60. Lines of magnetic force based upon the magnetic field act to the cavity 12 and overflow part 70 along the thickness of the cavity 12. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供一种制造磁性取向紊乱少,外形变形小的铁氧体磁体的制造方法,提供一种铁氧体磁铁的制造装置。 解决方案:制造铁氧体磁体的方法包括通过在施加有磁场的金属模具的腔中注射成型获得预成型件的方法以及烘烤预成型件的工艺。 空腔12在轴向方向上具有预定厚度的大致弓形横截面和沿轴向的矩形垂直横截面。 在空腔12的横截面的大致弓形形状的中心部分和空腔12的垂直横截面的一个第一轴向端部12a处设置用于将熔融状态的材料供给到空腔12的门60 在空腔12的垂直部分的另一个第二轴向端部12b和面向门60的位置处设置溢流部分70,熔化状态下从空腔12溢出的材料流过的溢流部分70。 基于磁场沿着空腔12的厚度对空腔12和溢流部分70起作用。版权所有:(C)2011,JPO&INPIT