公开(公告)号：KR1020090070374A

公开(公告)日：2009-07-01

申请号：KR1020070138364

申请日：2007-12-27

Applicant: 자화전자(주)

Inventor： 김승호 ,  장동열 ,  김효준

IPC: H01F1/053

Abstract: A manufacturing method of a radial anisotropic sintered magnet is provided to improve a magnetic property by heating a formed product formed through a stack forming and a magnetic forming at a sintering temperature. In a first step, a plurality of primary formed products(9,10) is formed by a magnetic field forming. A magnetic powder(5) is an anisotropic R-Fe-B magnetic powder. The magnetic powder is filled in an inner space of a mold frame(1). Electricity is applied to a top coil(8) and a bottom coil(3). The magnetic powder is compressed by a top punch(6) and a bottom punch(2). In a second step, a plurality of primary formed products is laminated on the mold frame, and is transformed into a secondary formed product(15). In a third step, the secondary formed product is sintered.

Abstract translation: 提供径向各向异性烧结磁体的制造方法，通过加热通过堆叠形成形成的成形体和烧结温度下的磁性成形来提高磁性。 在第一步骤中，通过磁场形成形成多个初级成形产品（9,10）。 磁性粉末（5）是各向异性的R-Fe-B磁性粉末。 磁粉填充在模架（1）的内部空间中。 电流施加到顶线圈（8）和底线圈（3）上。 磁性粉末由顶部冲头（6）和底部冲头（2）压缩。 在第二步骤中，多个初级成形产品层压在模架上，并被转化成二次成型产品（15）。 在第三步骤中，二次成型产物被烧结。

公开(公告)号：KR100698727B1

公开(公告)日：2007-03-23

申请号：KR1020060070912

申请日：2006-07-27

Applicant: 자화전자(주)

Inventor： 김승호 ,  박성하 ,  강동완 ,  김효영 ,  홍성민 ,  김인호

IPC: C01B31/04 ,  C04B35/536

CPC classification number: C01B32/20 ,  C01B32/22 ,  C04B35/536

Abstract: A graphite sheet and a manufacturing method thereof are provided to manufacture a graphite sheet of a high thermal conductivity in a surface direction and in a thickness direction by mixing graphite of different expansion multiples together. A method for manufacturing a graphite sheet includes the steps of processing natural graphite with intercalate solution of which a concentration is controlled to be 20-80 times of an expansion multiple of expanded graphite, draining a surplus solution from the intercalate-processed natural graphite and washing the same, forming expanded graphite in the shape of worm by exposing the washed natural graphite to an increased temperature, wherein the graphite is expanded by 20-80 times of an original volume thereof, and forming a semi-anisotropic graphite sheet having a thermal anisotropic coefficient in the range from 3 to 20 by carrying out compression rolling molding for the expanded graphite.

Abstract translation: 提供石墨片及其制造方法，通过将不同膨胀倍数的石墨混合在一起，在表面方向和厚度方向上制造高导热性的石墨片。 一种制造石墨片的方法包括以下步骤：将天然石墨的加入浓度控制在膨胀石墨的膨胀倍数的20-80倍之内，从插层处理的天然石墨中排出多余的溶液并洗涤 通过将经洗涤的天然石墨暴露于升高的温度下形成蜗杆形状的膨胀石墨，其中石墨膨胀其原始体积的20-80倍，并且形成具有热各向异性的半 - 各向异性石墨片 通过对膨胀石墨进行压缩成型，其系数在3〜20的范围内。

公开(公告)号：KR101071424B1

公开(公告)日：2011-10-10

申请号：KR1020070138364

申请日：2007-12-27

Applicant: 자화전자(주)

Inventor： 김승호 ,  장동열 ,  김효준

IPC: H01F1/053

Abstract: 본발명은이방성 R-Fe-B계(R은적어도하나이상의희토류원소)를주체로하는자석분말을자장성형기술을이용하여코아를중심으로방사형방향으로자장이발생하도록금형틀과코아를구성하여자장을가하면서자장성형하여이방화율이높은 1차성형체를복수개성형하는제1단계와; 상기복수개성형된 1차성형체를금형틀에적층하고다시성형하여 2차성형체를성형하는제2단계와; 상기 2차성형체를소결하는제3단계를포함하는것을특징으로하는원통형래디얼이방성소결자석의제조방법을제공한다.

公开(公告)号：KR1020110028168A

公开(公告)日：2011-03-17

申请号：KR1020090086135

申请日：2009-09-11

Applicant: 자화전자(주)

Inventor： 장태호 ,  이종욱 ,  김성주 ,  김승호

IPC: B29C35/02 ,  C08J3/24 ,  F16C13/00

CPC classification number: B29C35/02 ,  C08J3/24 ,  F16C13/006

Abstract: PURPOSE: A manufacturing method of a semi-conductive roller and a semi-conductive roller using the same are provided to prevent a development roller from being over-cured by completely curing the development roller using ultraviolet rays. CONSTITUTION: A semi-conductive roller(100) comprises a conductive shaft(110), an elastic layer(120), and an outermost layer(130). The conductive shaft is composed of a metal material. The elastic layer is made of silicon rubber and is formed around the conductive shaft. The outermost layer is made of resin and is formed around the elastic layer. The surface of the outermost layer is completely cured using ultraviolet rays.

Abstract translation: 目的：提供一种半导电辊和使用其的半导电辊的制造方法，以通过使用紫外线完全固化显影辊来防止显影辊过度固化。 构成：半导电辊（100）包括导电轴（110），弹性层（120）和最外层（130）。 导电轴由金属材料构成。 弹性层由硅橡胶制成，并围绕导电轴形成。 最外层由树脂制成，并围绕弹性层形成。 最外层的表面使用紫外线完全固化。

公开(公告)号：KR100781628B1

公开(公告)日：2007-12-03

申请号：KR1020060064721

申请日：2006-07-11

Applicant: 자화전자(주)

Inventor： 김효영 ,  강동완 ,  김승호

IPC: H01M8/02

CPC classification number: H01M8/0221 ,  H01M8/0213 ,  H01M8/0226 ,  H01M2008/1095 ,  Y02E60/523 ,  Y02P70/56

Abstract: A method for preparing a graphite composite fuel cell separator and a graphite composite fuel cell separator prepared by the method are provided to reduce compression molding time remarkably and to improve electrical conductivity and flexural strength. A graphite composite fuel cell separator is prepared by using a graphite composite material prepared by dry mixing 70-95 wt% of a natural graphite powder and 5-30 wt% of a thermosetting resin powder uniformly to make a mixing material for a fuel cell separator; variably filling the mixing material into a mold where a separator channel is carved and compression molding it at a room temperature to prepare a molded product having a density of 90-100 % corresponding to the theoretical density; and thermosetting the molded product at 100-200 deg.C for 10-100 min.

Abstract translation: 提供了一种制备石墨复合燃料电池隔板和通过该方法制备的石墨复合燃料电池隔板的方法，以显着地减少压缩模塑时间并提高导电性和挠曲强度。 通过使用通过将70-95重量％的天然石墨粉末和5-30重量％的热固性树脂粉末均匀干混制成的石墨复合材料来制备石墨复合燃料电池隔板，以制备燃料电池隔板的混合材料 ; 将混合材料可变地填充到模具中，在其中雕刻隔板通道并在室温下将其压缩成型，以制备密度为理论密度的90-100％的模制产品; 并在100-200℃下热塑成型产品10-100分钟。