JP3097701B2 - Plastic magnet material and manufacturing method thereof - Google Patents
Plastic magnet material and manufacturing method thereofInfo
- Publication number
- JP3097701B2 JP3097701B2 JP03139647A JP13964791A JP3097701B2 JP 3097701 B2 JP3097701 B2 JP 3097701B2 JP 03139647 A JP03139647 A JP 03139647A JP 13964791 A JP13964791 A JP 13964791A JP 3097701 B2 JP3097701 B2 JP 3097701B2
- Authority
- JP
- Japan
- Prior art keywords
- plastic magnet
- magnet material
- magnetic powder
- rare earth
- earth element
- 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.)
- Expired - Fee Related
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
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0578—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together bonded together
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Hard Magnetic Materials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、高温下で長期に亘り
使用されても、膨れによる変形を生ずることのない耐熱
性に優れたプラスチック磁石素材およびその製造方法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic magnet material excellent in heat resistance which does not cause deformation due to swelling even when used at a high temperature for a long period of time and a method for producing the same.
【０００２】[0002]
【従来技術】希土類元素の金属粉末を熱硬化性樹脂で結
合してプラスチック磁石素材とし、これを磁化させるこ
とにより得たプラスチック磁石が、各種産業界で広く使
用されている。例えば該プラスチック磁石は、ＦＤＤ
(フロッピーディスクドライブ)用のスピンドルモータや
ファクシミリ用のステッピングモータの如く、殊にＯＡ
関連製品における小型モータの磁極として好適である。2. Description of the Related Art A plastic magnet material obtained by binding a rare earth metal powder with a thermosetting resin and magnetizing the plastic magnet material is widely used in various industries. For example, the plastic magnet is FDD
(Floppy disk drive) spindle motor and facsimile stepping motor, especially OA
It is suitable as a magnetic pole of a small motor in a related product.
【０００３】従来のプラスチック磁石は、一般に以下の
工程を経て製造される。例えば、ネオジウムの如き希土
類元素および鉄やボロンからなる磁性粉末に、メチルエ
チル系溶剤の添加により溶解させた熱硬化性樹脂(一例
としてエポキシ樹脂)を加えて均一になるまで混合し、
これをモータの固定磁極の形状を有する金型に充填した
後に、８〜１０トンの圧力で圧縮プレス成形を行なう。
この成形された後の混合物は、バインダーである熱硬化
性樹脂が未だ硬化していないので、該混合物を炉中に装
入しアルゴンガスの不活性雰囲気下で、１５０℃の温度
で約１時間加熱保持する。これにより硬化処理が行なわ
れて、いわゆるプラスチック磁石素材が得られる。この
プラスチック磁石素材は、バリ取り等の後処理を施した
後に、これを磁化させることによって、モータ固定磁極
等の形状をしたプラスチック磁石が製造される。A conventional plastic magnet is generally manufactured through the following steps. For example, rare earth like neodymium
The magnetic properties Powder consisting of s elements and iron, boron, added and mixed until uniform (epoxy resin for example) thermosetting resin dissolved by the addition of methyl ethyl solvents,
This was filled into a mold having the shape of the fixed magnetic pole of the motor .
Thereafter , compression press molding is performed at a pressure of 8 to 10 tons.
Since the thermosetting resin as a binder has not been cured yet, the mixture after the molding is charged into a furnace and placed under an inert atmosphere of argon gas at a temperature of 150 ° C. for about 1 hour. Heat and hold. Thereby, a hardening treatment is performed, and a so-called plastic magnet material is obtained. this
The plastic magnet material is subjected to post-processing such as deburring, and then magnetized to produce a plastic magnet having a shape such as a motor fixed magnetic pole.
【０００４】[0004]
【発明が解決しようとする課題】このプラスチック磁石
は、一般に常温の下で使用されるが、用途によっては過
酷な高温条件の下で使用される場合もある。その一例と
して、プラスチック磁石でモータの磁極を構成し、これ
を外気温の高い時期に長時間に亘り使用する場合が想定
される。このような高温下での使用時に、前記プラスチ
ック磁石が経時的に膨れを生じ、最初の形状に対して僅
かではあるが変形を来すことがある。例えば、前記プラ
スチック磁石でモータの固定磁極を構成し、該モータを
高温条件下で長期に亘り使用すると、その固定磁極が熱
影響により変形して回転子と接触するに至り、モータの
回転が不能となる重大な不都合を招く。なおモータを使
用環境の最大温度１２０℃で、１００〜２００時間使用
する耐熱膨れ試験を行なったが、その結果によっても該
プラスチック磁石からなる固定磁極に膨れを生ずること
が確認された。The plastic magnet is generally used at room temperature, but may be used under severe high temperature conditions depending on the application. As one example, it is assumed that the magnetic pole of the motor is formed of a plastic magnet and used for a long time at a high ambient temperature. In use of such a high temperature, the plastic magnet Ji raw swelling over time, there is a slightly sometimes cause deformation to the first shape. For example, if a fixed magnetic pole of a motor is made of the plastic magnet and the motor is used for a long time under a high temperature condition, the fixed magnetic pole is deformed due to heat and comes into contact with a rotor, so that rotation of the motor becomes impossible. Causes serious inconvenience. A heat resistance swelling test was conducted in which the motor was used at a maximum temperature of 120 ° C. in an operating environment for 100 to 200 hours. The results also confirmed that swelling occurred in the fixed magnetic pole made of the plastic magnet.
【０００５】このように高温条件下で使用した場合に、
プラスチック磁石が経時的に膨れを生ずる理由として、
以下の原因が考えられる。すなわちプラスチック磁石
は、その製造工程において、熱硬化性樹脂と混合された
希土類元素を含む磁性粉末が金型中でプレス成形される
が、このとき該磁性粉末には平方センチ当り８〜１０ト
ンに及ぶ極めて大きな圧力が加えられる。金型中に充填
された磁性粉末は、その夫々が溶解した熱硬化性樹脂に
より全体をくるまれた状態となっているが、プレス成形
時に印加される前記圧力によって、個々の磁性粉末は破
砕されて割れや破断を生ずるに至る。従って高圧を加え
た後の磁性粉末は、ミクロ的に観察すると多数の破断面
を有している。[0005] When used under such high temperature conditions,
One reason plastic magnets swell over time is
The following causes are considered. That is, in a manufacturing process of a plastic magnet, a magnetic powder containing a rare earth element mixed with a thermosetting resin is press-molded in a mold. At this time, the magnetic powder is reduced to 8 to 10 tons per square centimeter. Very large pressures can be applied. The magnetic powder filled in the mold is in a state of being entirely wrapped by the thermosetting resin in which each is melted, but the individual magnetic powders are crushed by the pressure applied during press molding. Cracks and fractures. Therefore, the magnetic powder after application of high pressure has a large number of fracture surfaces when observed microscopically.
【０００６】このような状態でプレス成形された混合物
は、前述の如くアルゴンガスの雰囲気下で熱硬化処理が
施されプラスチック磁石素材とされる。この場合に、プ
ラスチック磁石素材を構成している磁性粉末は多くの破
断面を有しているが、炉中での熱硬化処理は無酸素状態
でなされるので、該破断面が酸化することはない。しか
しプラスチック磁石素材を磁化してモータの磁極を製造
し、該モータを高温の条件下で使用すると、そのプラス
チック磁石を構成している個々の磁性粉末における前記
破断面が徐々に酸化し、これにより先に述べた膨れを次
第に生ずるものと考えられる。[0006] The mixture press-molded in such a state is subjected to a thermosetting treatment in an atmosphere of argon gas as described above to obtain a plastic magnet material . In this case, the flop
Although the magnetic powder constituting the plastic magnet material has many fractured surfaces, the fractured surfaces do not oxidize because the thermosetting treatment in a furnace is performed in an oxygen-free state. However, when a magnetic pole of a motor is manufactured by magnetizing a plastic magnet material and the motor is used under a high temperature condition, the fracture surface of each magnetic powder constituting the plastic magnet gradually oxidizes, thereby causing It is considered that the swelling described above gradually occurs.
【０００７】[0007]
【発明の目的】この発明は、プラスチック磁石素材を磁
化させて、例えばモータの磁極を構成した場合に、これ
に内在している前記課題を好適に解決するべく提案され
たものであって、高温下で長期に亘り使用されても、経
時的に膨れを生じて変形することのない耐熱性に優れた
プラスチック磁石素材およびその製造方法を提供するこ
とを目的とする。SUMMARY OF THE INVENTION The present invention, magnetic plastic magnet material
By reduction, for example, the case where the magnetic poles of the motor, which has been proposed to suitably solve the problems that are inherent in this, be used for a long time at a high temperature, over time Excellent heat resistance without swelling and deformation
An object of the present invention is to provide a plastic magnet material and a method for manufacturing the same.
【０００８】[0008]
【課題を解決するための手段】前記課題を克服し、所期
の目的を達成するため、本発明に係るプラスチック磁石
素材は、希土類元素を含む磁性粉末と熱硬化性樹脂との
プレス成形体であって、その圧縮成形時に生じた前記磁
性粉末の破断面に予め酸化膜が形成されていることを特
徴とする。SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and achieve the desired object, a plastic magnet according to the present invention is provided.
Materials, the magnetic powder and a thermosetting resin containing a rare earth element
A press-formed body, wherein the
An oxide film is formed in advance on the fracture surface of the conductive powder .
【０００９】また同じく前記課題を克服し、所期の目的
を達成するため本願の別の発明に係るプラスチック磁石
素材の製造方法は、希土類元素を含む磁性粉末と熱硬化
性樹脂とを溶剤を加えて混合した後、これを所定形状に
プレス成形してなるプレス成形体を、酸素５〜９０％の
雰囲気の下で１５０℃〜２００℃に加熱して１０分以上
保持することを特徴とする。Further, in order to overcome the above-mentioned problems and achieve the intended object, a plastic magnet according to another invention of the present application is provided.
Method for producing a material, after the magnetic powder and a thermosetting resin containing a rare earth element added and mixed solvent, which the pressed bodies obtained by press molding into a predetermined shape, oxygen 5% to 90% of the atmosphere It is characterized in that it is heated to 150 ° C. to 200 ° C. and held for 10 minutes or more.
【００１０】[0010]
【実施例】次に、本発明に係るプラスチック磁石素材お
よびその製造方法につき、好適な実施例を挙げて以下説
明する。発明者は、プラスチック磁石素材を磁化してな
るプラスチック磁石を高温下で使用した場合に、前述の
如き膨れを生ずる原因が、先に解析したところにあると
考えられることに鑑み、磁性粉末の破断面に予め酸化膜
を形成しておけば、高温の下でも酸化がそれ以上は進行
せず、従って前記膨れを生ずることもないであろう旨を
知見するに至った。この知見に従い以下の実施例は、プ
レス成形した後の希土類元素を含む磁性粉末の破断面
に、如何にして予め酸化膜を形成させるようにするか、
を主たる内容としている。なお、希土類元素を含む磁性
粉末と熱硬化性樹脂とを、溶剤添加後に混合してから、
金型に充填してプレス成形を行なうまでは、先に述べた
ところと同一である。Next, a plastic magnet material and a method for producing the same according to the present invention will be described with reference to preferred embodiments. Inventors, when a plastic magnet formed by magnetizing a plastic magnet material used at high temperatures, is responsible for causing swelling such as described above, considering that are considered to be were analyzed earlier, fracture of the magnetic powder It has been found that if an oxide film is formed in advance on the cross section, oxidation does not proceed further even at a high temperature, and therefore the swelling will not occur. According to this finding, the following examples show how to form an oxide film in advance on the fracture surface of a magnetic powder containing a rare earth element after press molding,
Is the main content. In addition, after mixing the magnetic powder containing the rare earth element and the thermosetting resin after adding the solvent,
Until the mold is filled and press-molded, it is the same as described above.
【００１１】実施例では、プレス成形により破断面を生
じた希土類元素を含む磁性粉末を含む混合物を加熱し
て、前記熱硬化性樹脂による硬化処理を施すに際し、こ
れを酸素雰囲気の下で行ない、これにより前記破断面に
予め酸化膜を形成するようになっている。すなわち、希
土類元素を含む磁性粉末と熱硬化性樹脂とを溶剤を加え
て混合した後、これを所定形状にプレス成形することに
より、プラスチック磁石素材が得られる。このプラスチ
ック磁石素材を炉中に装入し、酸素雰囲気の下で前記溶
剤を揮散させるに充分な温度に加熱して、そのまま数時
間保持する。これによりプラスチック磁石素材に含まれ
ている溶剤を緩徐に揮散させることができ、従って多数
の微細な気孔を生ずる不都合が未然に防止される。[0011] In embodiments, heating the mixture containing the magnetic powder containing a rare earth element which caused the fracture surface by press molding, when subjected to a curing treatment by the thermosetting resin, which is performed under oxygen atmosphere Thus, an oxide film is formed on the fractured surface in advance. That is, a plastic magnet material can be obtained by adding a solvent to a magnetic powder containing a rare earth element and a thermosetting resin, mixing the mixture, and pressing the mixture into a predetermined shape. This plastic
The magnet material is placed in a furnace, heated to a temperature sufficient to volatilize the solvent in an oxygen atmosphere, and kept for several hours. As a result, the solvent contained in the plastic magnet material can be volatilized slowly, so that the inconvenience of forming many fine pores is prevented.
【００１２】このように溶剤の揮散を行なってから、同
じ炉中の酸素雰囲気(５〜９０％)の下で、プラスチック
磁石素材を１５０℃〜２００℃に加熱すると共に、これ
を少なくとも１０分以上、好ましくは１時間程度保持す
る。これにより希土類元素を含む磁性粉末における前記
破断面には、予め酸化膜が形成されるに至る。従って、
このようにして得たプラスチック磁石素材は、少なくと
も破断部の表面に酸化膜が形成された希土類元素を含む
磁性粉末を、熱硬化性樹脂で結合させたものとなってお
り、この酸化膜が一旦形成されると防護皮膜として機能
し、その後の酸化の進行が有効に防止される。After volatilization of the solvent in this manner, the plastic is removed in an oxygen atmosphere (5-90%) in the same furnace.
The magnet material is heated to 150 ° C. to 200 ° C., and is held for at least 10 minutes or more, preferably for about 1 hour. As a result, an oxide film is formed in advance on the fracture surface of the magnetic powder containing the rare earth element . Therefore,
The plastic magnet material obtained in this way contains at least a rare earth element having an oxide film formed on the surface of the broken part.
The magnetic powder is bonded with a thermosetting resin. Once this oxide film is formed, it functions as a protective film, and the subsequent oxidation is effectively prevented.
【００１３】この実施例に係るプラスチック磁石素材に
つき、耐熱膨れ試験を以下の如く行なった。すなわちプ
ラスチック磁石素材における熱硬化性樹脂の硬化処理
を、炉中での酸素濃度５〜８０％の各雰囲気下で、１７
０℃の加熱を１時間継続することにより行なった。また
従来の製法、例えばアルゴンガスの雰囲気下で１５０℃
の加熱を１時間継続して得たプラスチック磁石素材を別
途複数用意した。これらの試験片を１２０℃の温度で２
００時間大気中に放置し、夫々の試験片における耐熱膨
れ率を図１に示す如くプロットしてみた。この耐熱膨れ
率は、(Ｄ−Ｄ0)／Ｄ0×１００(％)で表わされる。ここ
にＤ0：耐熱膨れ試験前の試験片の径であり、Ｄ：耐熱
膨れ試験後の試験片の径である。図１から明らかな如
く、実施例に係るプラスチック磁石素材は、従来の方法
で製造したプラスチック磁石素材に比べて高温条件下で
の膨れが顕著に抑制され、耐熱性において優れているこ
とが判る。A heat swelling test was performed on the plastic magnet material according to this embodiment as follows. That flop
The hardening treatment of the thermosetting resin in the plastic magnet material is performed in a furnace at an oxygen concentration of 5 to 80% in each atmosphere.
The heating was carried out at 0 ° C. for 1 hour. Also, according to a conventional manufacturing method, for example, 150 ° C. in an atmosphere of argon gas.
A plurality of plastic magnet materials obtained by continuously heating for 1 hour were separately prepared. These specimens were heated at 120 ° C. for 2 hours.
The samples were allowed to stand in the air for 00 hours, and the thermal swelling ratio of each test piece was plotted as shown in FIG. This heat resistance swelling ratio is represented by (D−D 0 ) / D 0 × 100 (%). Here, D 0 is the diameter of the test piece before the heat resistant swelling test, and D is the diameter of the test piece after the heat resistant swelling test. As is clear from FIG. 1, the plastic magnet material according to the example has significantly reduced swelling under high-temperature conditions and is excellent in heat resistance as compared with the plastic magnet material manufactured by the conventional method.
【００１４】また図２は、希土類元素を含む磁性粉末に
形成される酸化膜を含む酸素含有量(ｗｔ％)について、
上記実施例の試験片をプロットし、従来方法による試験
片についても併せて記載したものである。図３は、本発
明および従来方法の各試験片の全体の酸素含有量を併記
したものである。これらから実施例では、予め成形時に
希土類元素を含む磁性粉末が酸化された以降の酸化重量
を抑え得るが、従来法では逆に成形時には殆ど酸化され
ず、その後の１２０℃×２００時間の過程で希土類元素
を含む磁性粉末が大幅に酸化し、膨れを顕著に生じるこ
とが理解される。従って、実施例に係るプラスチック磁
石素材を磁化することによりプラスチック磁石とすれ
ば、高温の条件下で使用しても膨れに伴なう変形を来す
ことがなくて好適である。FIG. 2 shows the oxygen content (wt%) including the oxide film formed on the magnetic powder containing the rare earth element .
The test pieces of the above examples are plotted, and the test pieces according to the conventional method are also described. FIG. 3 also shows the total oxygen content of each test piece of the present invention and the conventional method. From these, in the examples, it is possible to suppress the oxidation weight after the rare earth element-containing magnetic powder is oxidized in advance during molding, but in the conventional method, on the contrary, it is hardly oxidized during molding, and in the process of 120 ° C. × 200 hours thereafter. Rare earth elements
It is understood that the magnetic powder containing oxidized is greatly oxidized, resulting in significant swelling. Therefore, the plastic magnet according to the embodiment
If a plastic magnet by magnetizing the stone material, is suitable for without causing any accompanying deformation blistering used in high temperature conditions.
【００１５】[0015]
【発明の効果】以上説明した如く、本発明に係るプラス
チック磁石素材によれば、該複合体を構成する希土類元
素を含む磁性粉末の破断面に予め酸化膜を形成しておく
ことによって、その後の酸化進行を有効に防止すること
ができる。従って、モータの固定磁極の如く具体的にプ
ラスチック磁石として製品化された後に、これが高温下
で長期に亘り使用がなされても、経時的に変形すること
がなく優れた耐熱性を発揮し得るものである。As it has been described above, according to the present invention, plus according to the present invention
According to the Chick magnet material, rare earth sources that make up the complex
By forming an oxide film on the fracture surface of the magnetic powder containing silicon in advance, the subsequent oxidation can be effectively prevented. Therefore, even after being commercialized specifically as a plastic magnet, such as a fixed magnetic pole of a motor, it can exhibit excellent heat resistance without being deformed with time even if it is used for a long time at a high temperature. It is.
【図１】本発明の好適な実施例に係るプラスチック磁石
素材と、従来の製法により得たプラスチック磁石素材と
につき耐熱膨れ試験を行なった場合における夫々の試験
片の耐熱膨れ率をプロットした曲線図である。 Plastic magnet according to a preferred embodiment of the invention, FIG
Materials and is a curve diagram obtained by plotting the heat swelling rate of each of the specimens in the case of performing the heat blistering tests per plastic magnet material obtained by the conventional method.
【図２】本発明の好適な実施例に係るプラスチック磁石
素材と、従来のプラスチック磁石素材とにつき耐熱膨れ
試験を行なった場合に、各試験片の希土類元素を含む磁
性粉末に形成される酸化膜を含む酸素含有量との関係を
プロットした曲線図である。 Plastic magnet according to a preferred embodiment of the present invention; FIG
When a heat resistance swelling test was performed on a material and a conventional plastic magnet material , the magnetic field containing a rare earth element of each test piece was measured.
FIG. 4 is a curve diagram plotting a relationship with an oxygen content including an oxide film formed in a conductive powder.
【図３】本発明の好適な実施例に係るプラスチック磁石
素材と、従来のプラスチック磁石素材とにつき耐熱膨れ
試験を行なった場合に、各試験片における全体の酸素含
有量との関係をプロットした曲線図である。 Plastic magnet according to a preferred embodiment of the present invention; FIG
FIG. 4 is a curve diagram plotting a relationship between a material and a conventional plastic magnet material and a total oxygen content in each test piece when a heat resistance swelling test is performed.
Claims (4)
脂とのプレス成形体であって、その圧縮成形時に生じた
前記磁性粉末の破断面に予め酸化膜が形成されているこ
とを特徴とするプラスチック磁石素材。 1. A press-molding of the magnetic powder and a thermosetting resin containing a rare earth element, generated during the compression molding
A plastic magnet material, wherein an oxide film is previously formed on a fractured surface of the magnetic powder .
に予め形成される酸化膜は、酸素含有量にして０.１重
量％以上で０.５重量％以下であり、前記熱硬化性樹脂
の酸素含有量は、１.０重量％以下である請求項１記載
のプラスチック磁石素材。Wherein the acid film which is previously formed on the fracture surface of the magnetic powder containing the rare earth element, and the oxygen content is 0.5 wt% or less at 0.1 wt% or more, the thermosetting The plastic magnet material according to claim 1 , wherein the oxygen content of the resin is 1.0% by weight or less.
脂とを溶剤を加えて混合した後、これを所定形状にプレ
ス成形してなるプレス成形体を、酸素５〜９０％の雰囲
気の下で１５０℃〜２００℃に加熱して１０分以上保持
することを特徴とするプラスチック磁石素材の製造方
法。3. A press- formed body formed by adding a solvent to a magnetic powder containing a rare earth element and a thermosetting resin and then pressing the mixture into a predetermined shape under an atmosphere of 5 to 90% oxygen. A method for producing a plastic magnet material , comprising heating to 150 ° C. to 200 ° C. for 10 minutes or more.
レス成形体を、酸素５〜９０％の雰囲気の下で１５０℃
〜２００℃に加熱して１０分以上保持するに先立ち、前
記溶剤を揮散させるに充分な温度に加熱して数時間保持
することを特徴とする請求項３記載のプラスチック磁石
素材の製造方法。4. A flop formed by press molding to said predetermined shape
The molded article is heated to 150 ° C. in an atmosphere of 5-90% oxygen.
4. The plastic magnet according to claim 3, wherein the plastic magnet is heated to a temperature sufficient to volatilize the solvent and held for several hours before being heated to -200 [deg.] C. and held for 10 minutes or more.
Material manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03139647A JP3097701B2 (en) | 1991-05-14 | 1991-05-14 | Plastic magnet material and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03139647A JP3097701B2 (en) | 1991-05-14 | 1991-05-14 | Plastic magnet material and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04337603A JPH04337603A (en) | 1992-11-25 |
| JP3097701B2 true JP3097701B2 (en) | 2000-10-10 |
Family
ID=15250147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03139647A Expired - Fee Related JP3097701B2 (en) | 1991-05-14 | 1991-05-14 | Plastic magnet material and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3097701B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006080115A (en) * | 2004-09-07 | 2006-03-23 | Matsushita Electric Ind Co Ltd | Anisotropic rare earth-iron bond magnet |
| JP2007207936A (en) * | 2006-01-31 | 2007-08-16 | Tdk Corp | Rare earth permanent magnet |
| JP5098390B2 (en) * | 2007-03-27 | 2012-12-12 | Ｔｄｋ株式会社 | Rare earth magnets |
| JP4962870B2 (en) * | 2007-06-29 | 2012-06-27 | 日産自動車株式会社 | Method for manufacturing field pole magnet body, method for manufacturing permanent magnet type rotary electric motor, and field pole magnet body |
-
1991
- 1991-05-14 JP JP03139647A patent/JP3097701B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04337603A (en) | 1992-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS60207302A (en) | Rare earth element-iron magnet bonded with epoxy resin | |
| JPH07106110A (en) | Powder composition for manufacturing bond magnet, and magnetic anisotropic permanent magnet, and manufacture of magnetic anisotropic permanent magnet | |
| JP3097701B2 (en) | Plastic magnet material and manufacturing method thereof | |
| JPH04328805A (en) | Anisotropic configuration soft magnet alloy powder and manufacture thereof | |
| JPS6354702A (en) | Manufacture of rare earth-iron boron resin magnet | |
| JPH05135978A (en) | Rare earth magnet manufacturing method | |
| JPH0354161B2 (en) | ||
| JP7252768B2 (en) | Method for manufacturing rare earth bonded magnet | |
| JPH0645167A (en) | Manufacture of isotropic bond magnet | |
| JPS6144942B2 (en) | ||
| JPS60230957A (en) | Manufacture of permanent magnet | |
| JPS6355908A (en) | Manufacture of rare-earth resin magnet | |
| JP2568511B2 (en) | High strength with excellent heat and oxidation resistance | |
| JP2628852B2 (en) | Method of preventing oxidation of cemented carbide powder | |
| JPS59116176A (en) | Manufacture of ceramic sintered body | |
| CN120048645B (en) | Preparation method of neodymium-iron-boron magnet with high mechanical service characteristics | |
| JP3351554B2 (en) | Manufacturing method of sintered anisotropic magnet | |
| JPH03110804A (en) | Manufacture of nd-fe-b bonded magnet | |
| JPH03173103A (en) | Manufacture of bond magnet | |
| JP2003017308A (en) | High resistance magnet and method of manufacturing the same | |
| JPH07107162B2 (en) | Manufacturing method of sintered magnet alloy | |
| JPH0450725B2 (en) | ||
| JPH0410502A (en) | Manufacture of oxidation resistant plastic magnet | |
| JPS61107717A (en) | Manufacture of sintered type electrolytic battery | |
| JP2573865B2 (en) | Manufacturing method of permanent magnet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |