JPS61220315A - Manufacture of magnetic molded body - Google Patents

Manufacture of magnetic molded body

Info

Publication number
JPS61220315A
JPS61220315A JP5967785A JP5967785A JPS61220315A JP S61220315 A JPS61220315 A JP S61220315A JP 5967785 A JP5967785 A JP 5967785A JP 5967785 A JP5967785 A JP 5967785A JP S61220315 A JPS61220315 A JP S61220315A
Authority
JP
Japan
Prior art keywords
magnetic
molded body
magnetic field
organic binder
injection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5967785A
Other languages
Japanese (ja)
Inventor
Makoto Inoue
誠 井上
Tadaki Sakai
忠基 酒井
Yuji Kihara
木原　勇二
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Steel Works Ltd
Original Assignee
Japan Steel Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP5967785A priority Critical patent/JPS61220315A/en
Publication of JPS61220315A publication Critical patent/JPS61220315A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
    • H01F1/0558—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together bonded together

Abstract

PURPOSE:To allow easy molding of a magnetic molded body of even complicated structure by injection-molding mixed material of magnetic powder and organic binder in a magnetic field. CONSTITUTION:Magnetic powder including ferrite or rare-earth metals such as samarium and cobalt is mixed with organic binder suitable selection of resins such as attacktic polypropylene, polystylene and polyethylene; various kinds of wax and plasticizer and kneaded together under heating using an extruder and granulated with a granulating machine. This granulated, mixed material is injection-molded in a magnetic field with an injection molding machine having the function to generate a magnetic field to orient magnetic powder along the magnetic field. Then, after being demagnetized, the molded body is taken out from the injection molding machine, degreased to remove organic binder, sintered to obtain a magnetic molded body and finally again magnetized to acquire a permanent magnet.

Description

【発明の詳細な説明】 （イ）産業上の利用分野 本発明は、磁性成形体の製造方法に関するものである。[Detailed description of the invention] (b) Industrial application field The present invention relates to a method for manufacturing a magnetic molded body.

（ロ）従来の技術 自動車部品、通信機器部品、家庭用電気製品部品などに
使用される磁性部品を成形する方法として従来は次のよ
うな２つの方法がある。すなわち、第１の方法は磁性粉
末を加圧成形し、これを焼結することにより磁性成形体
とする方法であり、第２の方法は磁性粉末と有機バイン
ダーとを混合し、この混合材料を用いて射出成形した後
脱脂して有機バインダーを除去し、次いで焼結して磁性
成形体を得る方法である。第２の方法は例えば特開昭５
９−１２６６６０２号公報に示されている。(B) Prior Art There are two conventional methods for molding magnetic parts used in automobile parts, communication equipment parts, household electrical appliance parts, etc. That is, the first method is to press-mold magnetic powder and sinter it to form a magnetic molded body. In this method, a magnetic molded body is obtained by injection molding the magnetic material, degreasing it to remove the organic binder, and then sintering it. The second method is, for example,
No. 9-1266602.

（ハ）発明が解決しようとする問題点 上記第１の方法には、１軸方向にしか圧力を加えること
ができない加圧成形によって成形体を製造するため比較
的簡単な形状の成形体しか製造することができず、種々
の用途の電子部品に必要とされる複雑な形状の成形体を
得ることができないという問題点がある。また、上記第
２の方法には、成形中に磁性粉末を磁界中で配向させて
いないため、異方性を有する磁性成形体とすることがで
きず、磁気特性が劣ったものとなるという問題点がある
０本発明は、上記のような問題点を解決することを目的
としている。(c) Problems to be Solved by the Invention In the first method described above, only a relatively simple shaped molded product can be produced because the molded product is manufactured by pressure forming which can only apply pressure in one axial direction. There is a problem in that it is not possible to obtain molded bodies with complex shapes required for electronic components for various uses. In addition, the second method has the problem that because the magnetic powder is not oriented in a magnetic field during molding, it is not possible to form a magnetic molded body with anisotropy, resulting in inferior magnetic properties. The present invention aims to solve the above-mentioned problems.

（ニ）問題点を解決するための手段及び作用本発明は、
磁性粉末と有機バインダーとの混合材料を磁場中で射出
成形することにより、上記問題点を解決する。すなわち
、まず、バリウムフェライト（ＢａＯ・６ＦｅｚＯ□）
、ストロンチウム７　ｘライト（Ｓ　ｒｏｔ　６Ｆｅｚ
０３）などのフェライト系磁性粉末又はサマリウムコバ
ルト（ＳｍＣｏ　５　、　Ｓｍｚ　Ｃｏ１７）などの希
土類金属磁性粉末に、有機バインダーとしてアタクチッ
クポリプロピレン、ポリスチレン、ポリエチレンなどの
樹脂、各種ワックス及び可塑剤を適宜選択して混合した
ものを加え、これを押出機により加熱混練し、次いでこ
れを造粒機により造粒する。この造粒した混合材料を用
いて磁場発生機能を有する射出成形機（例えば、本出願
人の出願した実願昭５９−１２０２９５号に示されるよ
うな磁場射出成形機）によって磁場中で射出成形し、磁
性粉末を磁場配向させる０次いで、脱磁して成形体を射
出成形機から取り出し、脱脂することにより有機バイン
ダーを除去する０次いでこれを焼結させて磁性成形体を
得ることができる。こうして得られた磁性成形体を着磁
すれば永久磁石とすることができる。(d) Means and action for solving the problems The present invention includes:
The above problems are solved by injection molding a mixed material of magnetic powder and organic binder in a magnetic field. That is, first, barium ferrite (BaO・6FezO□)
, Strontium 7 x Light (S rot 6Fez
03) or rare earth metal magnetic powder such as samarium cobalt (SmCo 5 , Smz Co17), resins such as atactic polypropylene, polystyrene, polyethylene, various waxes, and plasticizers are appropriately selected as organic binders. The mixture is added, heated and kneaded using an extruder, and then granulated using a granulator. Using this granulated mixed material, injection molding is carried out in a magnetic field by an injection molding machine having a magnetic field generation function (for example, a magnetic field injection molding machine as shown in Utility Model Application No. 120295/1987 filed by the present applicant). Then, the magnetic powder is oriented in a magnetic field.Then, the molded body is demagnetized, the molded body is taken out from the injection molding machine, and the organic binder is removed by degreasing.Next, this can be sintered to obtain a magnetic molded body. By magnetizing the magnetic molded body thus obtained, it can be made into a permanent magnet.

（ホ）発明の詳細 な説明してきたように、本発明によると、磁性粉末を有
機バインダーと混合し、この混合材料を用いて磁場中で
射出成形するようにしたので、複雑な形状の磁性成形体
であっても容易に成形することができ、しかも磁性粉末
は一方向に配向させであるため、異方性磁性体となって
おり、優れた磁気特性を有している。(E) As described in detail, according to the present invention, magnetic powder is mixed with an organic binder, and this mixed material is injection molded in a magnetic field, so that magnetic molding of complex shapes can be performed. Since the magnetic powder is oriented in one direction, it is an anisotropic magnetic material and has excellent magnetic properties.

Claims (1)

【特許請求の範囲】[Claims] 磁性粉末と有機バインダーとを混合し、得られた混合材
料を磁場中で射出成形し、成形体を脱磁し、脱脂し、次
いで焼結する磁性成形体の製造方法。A method for producing a magnetic molded body, which comprises mixing magnetic powder and an organic binder, injection molding the resulting mixed material in a magnetic field, demagnetizing and degreasing the molded body, and then sintering the molded body.
JP5967785A 1985-03-26 1985-03-26 Manufacture of magnetic molded body Pending JPS61220315A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5967785A JPS61220315A (en) 1985-03-26 1985-03-26 Manufacture of magnetic molded body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5967785A JPS61220315A (en) 1985-03-26 1985-03-26 Manufacture of magnetic molded body

Publications (1)

Publication Number Publication Date
JPS61220315A true JPS61220315A (en) 1986-09-30

Family

ID=13120060

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5967785A Pending JPS61220315A (en) 1985-03-26 1985-03-26 Manufacture of magnetic molded body

Country Status (1)

Country Link
JP (1) JPS61220315A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63126907U (en) * 1987-02-06 1988-08-19
JPH01136549A (en) * 1987-11-20 1989-05-29 Canon Electron Inc Stepping motor
JPH0257277U (en) * 1988-10-19 1990-04-25
EP0504378A1 (en) * 1990-10-09 1992-09-23 Iowa State University Research Foundation, Inc. Method of making bonded permanent magnets
US5427734A (en) * 1992-06-24 1995-06-27 Sumitomo Special Metals Co., Ltd. Process for preparing R-Fe-B type sintered magnets employing the injection molding method
CN112712988A (en) * 2020-12-11 2021-04-27 广州金南磁性材料有限公司 Positioning adsorption magnet and preparation method and application thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59117205A (en) * 1982-12-24 1984-07-06 Shin Kobe Electric Mach Co Ltd Formation of plastic magnet
JPS59126602A (en) * 1983-01-10 1984-07-21 Hitachi Metals Ltd Manufacture of permanent magnet
JPS59165402A (en) * 1983-03-10 1984-09-18 Seiko Epson Corp Thermal resistance-improved composite permanent magnet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59117205A (en) * 1982-12-24 1984-07-06 Shin Kobe Electric Mach Co Ltd Formation of plastic magnet
JPS59126602A (en) * 1983-01-10 1984-07-21 Hitachi Metals Ltd Manufacture of permanent magnet
JPS59165402A (en) * 1983-03-10 1984-09-18 Seiko Epson Corp Thermal resistance-improved composite permanent magnet

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63126907U (en) * 1987-02-06 1988-08-19
JPH01136549A (en) * 1987-11-20 1989-05-29 Canon Electron Inc Stepping motor
JPH0257277U (en) * 1988-10-19 1990-04-25
EP0504378A1 (en) * 1990-10-09 1992-09-23 Iowa State University Research Foundation, Inc. Method of making bonded permanent magnets
US5427734A (en) * 1992-06-24 1995-06-27 Sumitomo Special Metals Co., Ltd. Process for preparing R-Fe-B type sintered magnets employing the injection molding method
CN112712988A (en) * 2020-12-11 2021-04-27 广州金南磁性材料有限公司 Positioning adsorption magnet and preparation method and application thereof

Similar Documents

Publication Publication Date Title
CN100386167C (en) Micro injection process of forming soft magnetic Fe-Ni alloy
DE4420318C2 (en) Polymer-based composition for the production of magnetic and magnetizable moldings
DE69401772T2 (en) Process for the production of rare earth iron boron magnets
JPS61220315A (en) Manufacture of magnetic molded body
KR970705527A (en) Process for the manufacture of molded bodies from hard ferrites
CN100568418C (en) The method of preparing bonded permanent ferrite by direct injection forming after in-situ polymerization
EP0217966B1 (en) Process for producing a multipolar magnet
JPH11176682A (en) Manufacturing bond (trade mark) magnet
DE3626360A1 (en) MANUFACTURING METHOD FOR TWO- AND MULTIPOLE PERMANENT MAGNETS WITH HIGH MAGNETIC ENERGY DENSITY
US4321222A (en) Method of manufacturing plastic-bonded anisotropic permanent magnets
JPS6252913A (en) Method and device for manufacture of multipolar anisotropic cylindrical magnet
JPS588571B2 (en) Simultaneous orientation magnetization method in injection molding
JPH0411702A (en) Manufacture of resin magnet
JP2020053515A (en) Manufacturing method of multipole bonded magnet composite
KR20230001591A (en) Method for manufacturing anisotropic 3d permanent magnet and thereof apparatus
JPH04312902A (en) Production of magnet
JP2000082611A (en) Extrusion-molded magnetic body using samarium-iron- nitrogen magnetic grain
JPS6393105A (en) Manufacture of isotropic bonded magnet
JP2000124018A (en) Injection-molded magnet body using samarium-iron- nitrogen anisotropic particles
JPS6486503A (en) Resin bond type magnet and manufacture thereof
JP3380870B2 (en) Rare earth magnet manufacturing method
JPH0786070A (en) Manufacture of bond magnet
JPH0447446B2 (en)
JPH02251111A (en) Manufacture of resin bonded type rare earth magnet
JP2002313615A (en) Plastic magnet composition