JPH0414205A - Plastic magnet - Google Patents
Plastic magnetInfo
- Publication number
- JPH0414205A JPH0414205A JP2116371A JP11637190A JPH0414205A JP H0414205 A JPH0414205 A JP H0414205A JP 2116371 A JP2116371 A JP 2116371A JP 11637190 A JP11637190 A JP 11637190A JP H0414205 A JPH0414205 A JP H0414205A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- rare earth
- flux density
- magnetic flux
- ferromagnetic body
- 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
Links
- 239000004033 plastic Substances 0.000 title claims abstract description 19
- 229920003023 plastic Polymers 0.000 title claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 28
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 21
- 239000000956 alloy Substances 0.000 claims abstract description 21
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 19
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 19
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 14
- 239000011812 mixed powder Substances 0.000 claims abstract description 7
- 239000011230 binding agent Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 2
- 230000005405 multipole Effects 0.000 claims description 2
- 230000005291 magnetic effect Effects 0.000 abstract description 31
- 230000004907 flux Effects 0.000 abstract description 18
- 230000005415 magnetization Effects 0.000 abstract description 8
- 239000002245 particle Substances 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 239000004952 Polyamide Substances 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 3
- 229920002647 polyamide Polymers 0.000 abstract description 3
- 229920000877 Melamine resin Polymers 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 1
- 239000004640 Melamine resin Substances 0.000 abstract 1
- 239000000654 additive Substances 0.000 abstract 1
- 230000000996 additive effect Effects 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 230000007423 decrease Effects 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- 229910017060 Fe Cr Inorganic materials 0.000 description 1
- 229910002544 Fe-Cr Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 238000009725 powder blending Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910000982 rare earth metal group alloy Inorganic materials 0.000 description 1
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
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は希土類合金粉末を用いたプラスチック磁石に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plastic magnet using rare earth alloy powder.
５ＩＩｌ−ＣＯ系あるいはＮｄ−Ｆｅ−Ｂ系等の希土類
合金粉末を用いたプラスチック磁石においては、肉薄リ
ング状の小型な磁石が容易に製造出来る等の利点があり
、最近ではＯＡ機器を中心に非常に需要が伸びる傾向に
ある。Plastic magnets using rare earth alloy powders such as 5IIl-CO or Nd-Fe-B have the advantage of being easy to manufacture small, thin-walled ring-shaped magnets, and have recently become very popular mainly in office automation equipment. Demand is on the rise.
上記プラスチック磁石はＳ ｍ −Ｃｏ系あるいはＮｄ
−Ｆｅ−Ｂ系等の希土類合金粉末をポリアミド。The above plastic magnet is S m -Co based or Nd
- Polyamide with rare earth alloy powder such as Fe-B type.
ポリイミド、エポキシ樹脂等のプラスチックバインダー
で結着し、所定形状にプレス成形して製造される。It is manufactured by binding with a plastic binder such as polyimide or epoxy resin and press-molding it into a predetermined shape.
しかしながら上記従来の希土類プラスチック磁石は、着
磁に強い磁界が必要であり、例えば多極状のステッピン
グモーターのマグネットローターとして用いるような場
合には、磁石外周に１０極以上の多極着磁する必要があ
るが、このような多極着磁に充分な着磁磁界が得られず
、希土類プラスチック磁石の持つ特性を充分に発揮させ
ることが出来ないと云う問題点があった。However, the above-mentioned conventional rare earth plastic magnets require a strong magnetic field for magnetization, and for example, when used as a magnetic rotor for a multipolar stepping motor, it is necessary to magnetize the outer circumference of the magnet with 10 or more poles. However, there was a problem in that a sufficient magnetizing magnetic field could not be obtained for such multi-pole magnetization, and the characteristics of rare earth plastic magnets could not be fully demonstrated.
本発明は上記従来の課題を解決する手段として希土類合
金粉末に５０重量％以下の強磁性体粉末を混合した混合
粉末を、プラスチックを結着剤として、所定形状に成形
したプラスチック磁石を提供するものである。As a means of solving the above-mentioned conventional problems, the present invention provides a plastic magnet in which a mixed powder obtained by mixing rare earth alloy powder with 50% by weight or less of ferromagnetic powder is molded into a predetermined shape using plastic as a binder. It is.
本発明に用いられる希土類合金はＣｅ、Ｐｒ。The rare earth alloys used in the present invention are Ce and Pr.
Ｎｄ、Ｐｍ、 Ｓｓ、 Ｅｕ、 Ｇｄ、 Ｔｂ、 Ｄｙ
、 Ｈｏ、 Ｅｒ。Nd, Pm, Ss, Eu, Gd, Tb, Dy
, Ho, Er.
Ｔｍ、Ｙｂ、Ｌｕ等の希土類金属とＦｅ、Ｃｏ、Ｎｉ等
の鉄系金属と、所望なればＢ、Ｃ，Ｎ、Ｓｉ、Ｐ等の元
素を添加した合金であり、該希土類合金は通常的１５０
〜２５０μｍの粒径を有する粉体として用いられる。該
希土類合金としては例えばＮｄ−Ｆｅ−Ｂ合金、Ｓｍ−
Ｃｏ合金等がある。It is an alloy of rare earth metals such as Tm, Yb, and Lu, iron-based metals such as Fe, Co, and Ni, and, if desired, elements such as B, C, N, Si, and P. 150
It is used as a powder with a particle size of ~250 μm. Examples of the rare earth alloy include Nd-Fe-B alloy, Sm-
There are Co alloys, etc.
本発明に用いる強磁性体粉末は高飽和磁束密度を持つも
のであり、例えばＦｅ、 Ｎｉ、 Ｃｏ、あるいはＦｅ
−Ｎｉ合金、Ｆｅ−Ｃｏ合金、Ｆ ｅ −Ｃｒ合金等を
使用することが望ましい。該強磁性体粉末は好ましくは
３．０ｍｍ以下の粒径を有する粉末とされ、通常、上記
希土類合金粉末に５０重量％以下の添加量で混合される
。The ferromagnetic powder used in the present invention has a high saturation magnetic flux density, such as Fe, Ni, Co, or Fe.
-Ni alloy, Fe-Co alloy, Fe-Cr alloy, etc. are preferably used. The ferromagnetic powder preferably has a particle size of 3.0 mm or less, and is usually mixed with the rare earth alloy powder in an amount of 50% by weight or less.
本発明にバインダーとして用いるプラスチックとしては
、ポリアミド、ポリイミド、エポキシ樹脂、尿素樹脂、
メラミン樹脂等があり、通常上記混合粉末に対して１〜
１０重量％程度添加される。Plastics used as binders in the present invention include polyamides, polyimides, epoxy resins, urea resins,
There are melamine resins, etc., and it is usually 1 to 1 for the above mixed powder.
It is added in an amount of about 10% by weight.
上記希土類合金粉末−強磁性体粉末−プラスチックの混
合物は通常ホットプレス、冷間プレス、静水圧プレス等
によって所定形状（例えば肉薄リング状）に成形され、
その後所望なれば適当な温度に加熱される。このように
して得られた成形物はその後、磁場内に置かれて磁界を
印加し着、磁されるが、本発明においては望ましくは４
極以上の多極状に着磁される。The mixture of rare earth alloy powder, ferromagnetic powder, and plastic is usually molded into a predetermined shape (for example, a thin ring shape) by hot pressing, cold pressing, isostatic pressing, etc.
It is then heated to a suitable temperature if desired. The molded product thus obtained is then placed in a magnetic field and magnetized by applying a magnetic field.
It is magnetized in a multipolar shape with more than one pole.
本発明のプラスチック磁石は上記したように希土類合金
粉末と強磁性体粉末とからなるが、該強磁性体粉末を添
加することによって、磁石の保磁力は低下し着磁性が改
善される。−力強磁性体粉末の添加量が５０重量％まで
は、残留磁束密度の値の低下は極くわずかであり、多極
状に着磁しても表面磁束密度は優れた値となる。As described above, the plastic magnet of the present invention is made of rare earth alloy powder and ferromagnetic powder, and by adding the ferromagnetic powder, the coercive force of the magnet is reduced and the magnetization is improved. - When the amount of ferromagnetic powder added is up to 50% by weight, the residual magnetic flux density value decreases only slightly, and even when magnetized in a multipolar configuration, the surface magnetic flux density remains at an excellent value.
２９重量％Ｎｄ−１，３重量％Ｂ−残部Ｆｅなる組成を
有する希土類合金の超急冷粉（粒径２００μｍ）に、鉄
粉（粒径１５０μｍ以下）を種々の比率で添加した混合
粉末に、エポキシ樹脂を３重量％混合し、粉末プレスに
て外径２０＋ｍ＋、内径１８ｍ、厚さ１０ｍｍのリング
状に成形し、該成形物はその後１５０℃、１時間加熱し
て硬化させた。このようにして得られたリング状磁石を
磁場内において磁界を印加し、着磁して磁気特性を測定
した。A mixed powder made by adding iron powder (particle size of 150 μm or less) at various ratios to ultra-quenched rare earth alloy powder (particle size of 200 μm) having a composition of 29% by weight Nd-1,3% by weight B-balance Fe, 3% by weight of epoxy resin was mixed and molded into a ring shape with an outer diameter of 20+m+, an inner diameter of 18m, and a thickness of 10mm using a powder press, and the molded product was then heated at 150° C. for 1 hour to harden. A magnetic field was applied to the thus obtained ring-shaped magnet in a magnetic field to magnetize it, and its magnetic properties were measured.
第１図には鉄粉添加量と、保磁力ＩＨｃおよび残留磁束
密度Ｂｒとの関係が示される。FIG. 1 shows the relationship between the amount of iron powder added, coercive force IHc, and residual magnetic flux density Br.
第１図によれば、鉄粉添加量に比例して保磁力が略直線
的に低下して、着磁性が改善されるが、一方残留磁束密
度は鉄粉添加量が４０重量％まではほとんど低下せず、
多極着磁の表面磁束密度は優れた値となることが認めら
れる。According to Figure 1, the coercive force decreases almost linearly in proportion to the amount of iron powder added, and the magnetization is improved, but on the other hand, the residual magnetic flux density is almost constant until the amount of iron powder added is 40% by weight. does not decrease,
It is recognized that the surface magnetic flux density of multipolar magnetization has an excellent value.
第２図には鉄粉３０重量％を添加した本実施例の磁石と
、鉄粉を添加しないＮｄ−Ｆｅ−Ｂ合金のみを用いた従
来の磁石との比較において、印加磁界と残留磁束密度と
の関係が示される。Figure 2 shows the relationship between the applied magnetic field and the residual magnetic flux density when comparing the magnet of this example with 30% by weight of iron powder added and a conventional magnet using only Nd-Fe-B alloy without adding iron powder. The relationship between is shown.
第２図のよれば１本発明では希土類合金粉末に強磁性体
粉末を添加することによって保磁力が低下した結果、着
磁性が改善されて、低い着磁磁界で高い残留磁束密度が
得られることが認められる。According to Figure 2, 1. In the present invention, the coercive force is reduced by adding ferromagnetic powder to the rare earth alloy powder, and as a result, the magnetization is improved and a high residual magnetic flux density can be obtained with a low magnetizing magnetic field. is recognized.
第３図には第２図に用いた本実施例の磁石と従来の磁石
との比較において、外周４８極着磁した場合の表面磁束
密度が示される６
第３図によれば、本実施例の磁石は従来の磁石では得ら
れない高い表面磁束密度約３ＫＧが得られる。（従来品
は約２．５ＫＧ）ことがわかる。FIG. 3 shows the surface magnetic flux density when the magnet of this example used in FIG. 2 and a conventional magnet are magnetized with 48 poles on the outer circumference6. With this magnet, a high surface magnetic flux density of approximately 3 KG, which cannot be obtained with conventional magnets, can be obtained. (The conventional product weighs approximately 2.5 kg).
しかも第３図をみれば表面磁束密度のばらつきが従来の
磁石よりも小さく、ステッピングモーターとして用いた
場合には、モーターの振れおよび出力ぶれが極端にツノ
）さくなることが分かった６〔効果〕
したがって本発明においては、希土類プラスチック磁石
の着磁性が改善され、低い磁界を適用して多極状に着磁
することが極めて容易になり、表面磁束密度も高くかつ
ばらつきがない磁石が得られ、４８極、９６極などのＤ
Ｍ型超多極のステッピングモーターが実用化される可能
性が見出された。Moreover, as shown in Figure 3, the variation in surface magnetic flux density is smaller than that of conventional magnets, and when used as a stepping motor, the motor runout and output fluctuation become extremely sharp.6 [Effect] Therefore, in the present invention, the magnetization of the rare earth plastic magnet is improved, it is extremely easy to magnetize it into a multipolar shape by applying a low magnetic field, and a magnet with a high surface magnetic flux density and no variation can be obtained. D such as 48 poles and 96 poles
It has been discovered that there is a possibility that an M-type ultra-multipolar stepping motor will be put to practical use.
第１図は実施例の磁石の鉄粉添加量（重量％）と保磁力
Ｉ Ｈｃおよび残留磁束密度Ｂｒとの関係を示すもので
あり、第２図は実施例の磁石と従来の磁石との比較にお
ける印加磁界と残留磁束密度Ｂｒとの関係を示すもので
あり、第３図は実施例の磁石と従来の磁石とを外周４８
極着磁した場合の表面磁束密度を示すものである。
第２図において・−・は本実施例のグラフ、Ｏ−○は従
来のグラフである。
特許出願人 大同特殊鋼株式会社
代 理 人 宇 佐 見 忠 昇
給１回
鉄粉配合割合（重量’／、）Figure 1 shows the relationship between the amount of iron powder added (wt%), coercive force IHc, and residual magnetic flux density Br in the magnet of the example, and Figure 2 shows the relationship between the magnet of the example and the conventional magnet. The relationship between the applied magnetic field and the residual magnetic flux density Br in comparison is shown in FIG.
This shows the surface magnetic flux density when polarized. In FIG. 2, -- is a graph of this embodiment, and O-- is a conventional graph. Patent applicant: Daido Steel Co., Ltd. Representative: Tadashi Usa Mi Tadashi Usa One pay raise Iron powder blending ratio (weight'/,)
Claims (2)
混合した混合粉末を、プラスチックを結着剤として、所
定形状に成形したことを特徴とするプラスチック磁石。1. A plastic magnet characterized in that a mixed powder obtained by mixing rare earth alloy powder with 50% by weight or less of ferromagnetic powder is molded into a predetermined shape using plastic as a binder.
ている特許請求の範囲１に記載のプラスチック磁石。2. 2. The plastic magnet according to claim 1, wherein the plastic magnet is magnetized in a multi-pole form of four or more poles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2116371A JPH0414205A (en) | 1990-05-02 | 1990-05-02 | Plastic magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2116371A JPH0414205A (en) | 1990-05-02 | 1990-05-02 | Plastic magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0414205A true JPH0414205A (en) | 1992-01-20 |
Family
ID=14685326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2116371A Pending JPH0414205A (en) | 1990-05-02 | 1990-05-02 | Plastic magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0414205A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009113871A (en) * | 2007-11-01 | 2009-05-28 | Sharp Corp | Fluorescent tube collecting container, collecting method of fluorescent tube using it, and recycling method of liquid crystal display device |
-
1990
- 1990-05-02 JP JP2116371A patent/JPH0414205A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009113871A (en) * | 2007-11-01 | 2009-05-28 | Sharp Corp | Fluorescent tube collecting container, collecting method of fluorescent tube using it, and recycling method of liquid crystal display device |
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