公开(公告)号：US4604042A

公开(公告)日：1986-08-05

申请号：US618183

申请日：1984-06-07

Applicant: Shigeho Tanigawa ,  Shuichi Shiina ,  Kimio Uchida

Inventor： Shigeho Tanigawa ,  Shuichi Shiina ,  Kimio Uchida

IPC: B29C45/00 ,  H01F7/02 ,  H01F13/00 ,  H01F41/02 ,  B28B17/00

CPC classification number: H01F13/003 ,  B29C45/0013 ,  H01F41/028 ,  H01F7/0268 ,  Y10S425/033

Abstract: A mold for producing an anisotropic magnet from a composition essentially consisting of magnetic powder and a binder, a mold body, a cavity for molding the composition in the presence of an anisotropically oriented magnetic field produced by a plurality of first magnets for providing magnetic fluxes for the magnetic field in the cavity, yokes, each provided between the cavity and the first magnets, and second magnets provided on both circumferential sides of the yokes for preventing the leakage of the magnetic fluxes. The first and second magnets are made of permanent magnets such as rare earth cobalt magnets. The mold may be provided at both ends with third magnets for preventing the axial leakage of the magnetic flux from the axial ends of the yokes. Two or more molds may be combined in a single molding apparatus while sharing the first magnets. This mold is suitable for the injection, extrusion or insert molding of bonded magnet rolls, motor rotors, etc.

Abstract translation: 一种用于由主要由磁性粉末和粘合剂组成的组合物制成各向异性磁体的模具，模具体，用于在由用于提供磁通量的多个第一磁体产生的各向异性取向磁场的情况下模制该组合物的腔 空腔中的磁场，各自设置在空腔和第一磁体之间的磁轭，以及设置在磁轭的两个周向侧上的第二磁体，用于防止磁通量的泄漏。 第一和第二磁体由诸如稀土钴磁体的永磁体制成。 模具可以在两端设置有用于防止磁通量从轭的轴向端部轴向泄漏的第三磁体。 两个或更多个模具可以在共享第一磁体的同时在单个成型设备中组合。 该模具适用于粘结磁铁辊，电机转子等的注塑，挤出或嵌入成型

公开(公告)号：US06383407B2

公开(公告)日：2002-05-07

申请号：US09784046

申请日：2001-02-16

Applicant: Yasunobu Ogata ,  Yutaka Kubota ,  Takashi Takami ,  Shuichi Shiina

Inventor： Yasunobu Ogata ,  Yutaka Kubota ,  Takashi Takami ,  Shuichi Shiina

IPC: C04B3540

CPC classification number: C01G49/0054 ,  C01G49/0063 ,  C01G49/0072 ,  C01G51/006 ,  C01G53/006 ,  C01P2002/52 ,  C01P2004/45 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/10 ,  C01P2006/42 ,  C04B35/2633 ,  C04B35/2683 ,  C04B35/6261 ,  C04B35/6262 ,  C04B35/62625 ,  C04B35/6263 ,  C04B35/63 ,  C04B2235/3213 ,  C04B2235/3224 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3232 ,  C04B2235/3239 ,  C04B2235/3262 ,  C04B2235/3274 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/6022 ,  C04B2235/72 ,  C04B2235/724 ,  C04B2235/726 ,  C04B2235/727 ,  C04B2235/767 ,  H01F1/11 ,  H01F1/113 ,  H01F7/0268 ,  H01F41/0273

Abstract: A ferrite powder for bonded magnets having a substantially magnetoplumbite-type crystal structure and an average diameter of 0.9-2 &mgr;m, the ferrite powder having a basic composition represented by the following general formula: (A1−xRx)O.n[(Fe1−yMy)2O3] by atomic ratio, wherein A is Sr and/or Ba; R is at least one of rare earth elements including Y, La being indispensable; M is at least one element selected from the group consisting of Co, Mn, Ni and Zn; and x, y and n are numbers meeting the conditions of 0.01≦x≦0.4, [x/(2.6n)]≦y≦[x/(1.6n)], and 5≦n≦6, (Si+Ca) being 0.2 weight % or less, and (Al+Cr) being 0.13 weight % or less, can be produced by mixing iron oxide containing 0.06 weight % or less of (Si+Ca) and 0.1 weight % or less of (Al+Cr) with compounds of A, R and M elements, calcining the resultant mixture for ferritization, pulverizing the resultant magnetically isotropic ferrite and then heat-treating the pulverized ferrite at 750-950° C. for 0.5-3 hours in the air.

Abstract translation: 铁氧体粉末，具有基本上为磁铅石型晶体结构，平均直径为0.9〜2μm的铁氧体粉末，所述铁氧体粉末具有以下通式表示的基本组成：（A1-xRx）On [（Fe1-yMy） 2O3]，其中A是Sr和/或Ba; R是包括Y，La不可缺少的稀土元素中的至少一种; M是选自Co，Mn，Ni和Zn中的至少一种元素; 并且x，y和n是满足0.01 <= x <= 0.4，[x /（2.6n）] <= y <= [x /（1.6n）]和5 <= n <= 6 ，（Si + Ca）为0.2重量％以下，（Al + Cr）为0.13重量％以下，可以通过混合含有0.06重量％以下的（Si + Ca）和0.1重量％的氧化铁或 将Al（Al + Cr）与A，R和M元素的化合物相比较，煅烧所得的铁素体混合物，粉碎所得的磁各向同性铁素体，然后在750-950℃下热处理粉碎的铁素体0.5-3小时 在空中。

公开(公告)号：US06284150B1

公开(公告)日：2001-09-04

申请号：US09381697

申请日：1999-09-23

Applicant: Yasunobu Ogata ,  Yutaka Kubota ,  Takashi Takami ,  Shuichi Shiina

Inventor： Yasunobu Ogata ,  Yutaka Kubota ,  Takashi Takami ,  Shuichi Shiina

IPC: H01F911

CPC classification number: C01G49/0054 ,  C01G49/0063 ,  C01G49/0072 ,  C01G51/006 ,  C01G53/006 ,  C01P2002/52 ,  C01P2004/45 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/10 ,  C01P2006/42 ,  C04B35/2633 ,  C04B35/2683 ,  C04B35/6261 ,  C04B35/6262 ,  C04B35/62625 ,  C04B35/6263 ,  C04B35/63 ,  C04B2235/3213 ,  C04B2235/3224 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3232 ,  C04B2235/3239 ,  C04B2235/3262 ,  C04B2235/3274 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/6022 ,  C04B2235/72 ,  C04B2235/724 ,  C04B2235/726 ,  C04B2235/727 ,  C04B2235/767 ,  H01F1/11 ,  H01F1/113 ,  H01F7/0268 ,  H01F41/0273

Abstract: A ferrite powder for bonded magnets having a substantially magnetoplumbite-type crystal structure and an average diameter of 0.9-2 &mgr;m, the ferrite powder having a basic composition represented by the following general formula: (A1-xRxO.n[Fe1-yMy)2O3] by atomic ratio, wherein A is Sr and/or Ba; R is at least one of rare earth elements including Y, La being indispensable; M is at least one element selected from the group consisting of Co, Mn, Ni and Zn; and x, y and n are numbers meeting the conditions of 0.01≦x≦0.4, [x/(2.6n)]≦y≦[x/(1.6n)], and 5≦n≦6, (Si+Ca) being 0.2 weight % or less, and (Al+Cr) being 0.13 weight % or less, can be produced by mixing iron oxide containing 0.06 weight % or less of (Si+Ca) and 0.1 weight % or less of (Al+Cr) with compounds of A, R and M elements, calcining the resultant mixture for ferritization, pulverizing the resultant magnetically isotropic ferrite and then heat-treating the pulverized ferrite at 750-950° C. for 0.5-3 hours in the air.

Abstract translation: 一种铁氧体粉末，具有基本上为磁铅石型晶体结构，平均直径为0.9〜2μm的铁氧体粉末，所述铁氧体粉末具有以下通式表示的碱性组成：（A1-xRxO.n [Fe1-yMy）2O3 ]其中A是Sr和/或Ba; R是包括Y，La不可缺少的稀土元素中的至少一种; M是选自Co，Mn，Ni和Zn中的至少一种元素; 并且x，y和n是满足0.01 <= x <= 0.4，[x /（2.6n）] <= y <= [x /（1.6n）]和5 <= n <= 6 ，（Si + Ca）为0.2重量％以下，（Al + Cr）为0.13重量％以下，可以通过混合含有0.06重量％以下的（Si + Ca）和0.1重量％的氧化铁或 将Al（Al + Cr）与A，R和M元素的化合物相比较，煅烧所得的铁素体混合物，粉碎所得的磁各向同性铁素体，然后在750-950℃下热处理粉碎的铁素体0.5-3小时 在空中。