JPH0696924A - Resin-bonded magnet - Google Patents
Resin-bonded magnetInfo
- Publication number
- JPH0696924A JPH0696924A JP4248184A JP24818492A JPH0696924A JP H0696924 A JPH0696924 A JP H0696924A JP 4248184 A JP4248184 A JP 4248184A JP 24818492 A JP24818492 A JP 24818492A JP H0696924 A JPH0696924 A JP H0696924A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- magnet
- anaerobic
- bonded magnet
- bonded
- 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
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
- H01F1/06—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 in the form of particles, e.g. powder
- H01F1/08—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 in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/083—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 in the form of particles, e.g. powder pressed, sintered, or bound together in a bonding agent
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は樹脂結合型磁石に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin-bonded magnet.
【０００２】[0002]
【従来の技術】現在、生産されている圧縮成形による樹
脂結合型磁石は磁石粉末にエポキシ樹脂を混ぜ合わせた
粉末を金型に充填し成形して製造されている。この時
に、金型より完全に抜けきらない空気が、磁石内部に空
孔として多く残っており発塵や吸湿による錆発生の原因
となっている。この課題に対し従来は、エポキシ樹脂コ
ーティング（含浸、スプレー、電着等）により防止して
きた。2. Description of the Related Art Currently, resin-bonded magnets produced by compression molding are manufactured by filling a mold with powder obtained by mixing magnet powder with epoxy resin and molding. At this time, a large amount of air that cannot be completely removed from the mold remains in the magnet as holes, which causes rust due to dust generation and moisture absorption. Conventionally, this problem has been prevented by epoxy resin coating (impregnation, spraying, electrodeposition, etc.).
【０００３】しかしながら、エポキシ樹脂コーティング
を硬化させる際の加熱により、熱膨張した磁石の内部に
エポキシ樹脂が染み込んだまま硬化するため、寸法変化
が発生し精度不良を引き起こすという問題を有してい
る。However, when the epoxy resin coating is heated, the epoxy resin is hardened while the epoxy resin soaks into the thermally expanded magnet, which causes a dimensional change and causes a problem in accuracy.
【０００４】[0004]
【発明が解決しようとする課題】本発明はこのような課
題を解決するものであり、その目的は樹脂結合型磁石に
嫌気性樹脂を含浸し空孔の目止めを行い、嫌気性樹脂
が、空気と遮断されることにより常温または、８０℃以
下で硬化する特性をいかして寸法精度の高い防発塵性、
耐食性の優れた、高強度の樹脂結合型磁石を得ることに
ある。SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and an object thereof is to impregnate a resin-bonded magnet with an anaerobic resin to seal pores. Dust-proof property with high dimensional accuracy by utilizing the property of hardening at room temperature or below 80 ° C by being shielded from air
It is to obtain a resin-strength magnet having high corrosion resistance and high strength.
【０００５】[0005]
【課題を解決するための手段】本発明は、樹脂結合型希
土類磁石への含浸用樹脂として嫌気性接着剤を用いるこ
とを特徴とする。The present invention is characterized in that an anaerobic adhesive is used as a resin for impregnating a resin-bonded rare earth magnet.
【０００６】代表的な嫌気性接着剤である「ロックタイ
ト」の主成分は、テトラエチレングリコールジメタクリ
レートであるといわれ、化１に表される。The main component of "Loctite", which is a typical anaerobic adhesive, is said to be tetraethylene glycol dimethacrylate and is represented by Chemical Formula 1.
【０００７】[0007]
【化１】 [Chemical 1]
【０００８】これを空気に触れない状態におくと重合が
おこり、全部固形のポリマーに変わって被着体に充填接
着の役割を演じる。この重合は、鉄などの金属との接触
によって促進され、室温では１０〜１２時間、２１２Ｆ
°では１０分間、３５０Ｆ°では５分間で効果する。[0008] If this is not exposed to the air, polymerization will occur, and it will turn into a solid polymer and play the role of filling adhesion to the adherend. This polymerization is promoted by contact with a metal such as iron, and at room temperature for 10 to 12 hours, 212 F
It is effective in 10 minutes at 10 ° and 5 minutes at 350 ° F.
【０００９】上記の構造を持つ化合物のうち、ｎ＝１〜
１０の範囲のもの全てが嫌気性接着剤の主成分モノマー
として利用できる。Among the compounds having the above structures, n = 1 to 1
All those in the range of 10 can be used as the main monomer of the anaerobic adhesive.
【００１０】また、これらのモノマーに、金属塩やメル
カプタン、カルボン酸またはそのエステル等を加える
と、硬化の早い重合性組成物が得られる。If a metal salt, a mercaptan, a carboxylic acid or an ester thereof is added to these monomers, a polymerizable composition that cures quickly can be obtained.
【００１１】嫌気性接着剤が、「嫌気重合性」を示すの
は、主成分モノマーと酸素およびラジカル重合開始剤の
組成物系内における平衡と、被着体によるその破壊に基
づくと推定されるが、まだ定説にはいたっていない。It is presumed that the anaerobic adhesive exhibits "anaerobic polymerizability" based on the equilibrium of the main component monomer with oxygen and the radical polymerization initiator in the composition system and its destruction by the adherend. However, the dogma hasn't been reached yet.
【００１２】（接着剤ハンドブック（第２版）日刊工業
新聞社発行） 本発明は、この接着剤の嫌気重合を利用したものであ
る。樹脂結合型磁石内の空孔に含浸、または真空含浸さ
れた嫌気性接着剤が、空気と遮断され硬化した後、表面
の余分な接着剤を水（湯）または溶剤にて洗い流し目止
めを行う。(Adhesive Handbook (Second Edition), Published by Nikkan Kogyo Shimbun) The present invention utilizes anaerobic polymerization of this adhesive. After the anaerobic adhesive that has been impregnated in the holes inside the resin-bonded magnet or vacuum impregnated is blocked from the air and cured, the excess adhesive on the surface is rinsed with water (hot water) or solvent to stop it. .
【００１３】また、本発明に使用する嫌気性接着剤は、
硬化が嫌気重合のみによるものの他に紫外線により硬化
する性質を合わせ持つＵＶ嫌気性接着剤や、熱により硬
化する性質を合わせ持つ接着剤、等のもので特に限定す
るものではない。The anaerobic adhesive used in the present invention is
There is no particular limitation as to a UV anaerobic adhesive that also has the property of being cured by ultraviolet rays, an adhesive that also has the property of being cured by heat, and the like in addition to those that are cured only by anaerobic polymerization.
【００１４】以下に本発明について実施例をもとに詳細
に説明する。The present invention will be described in detail below with reference to examples.
【００１５】[0015]
【実施例】急冷薄帯法によるＮｄーＦｅ−Ｂ系の希土類
磁石粉末（平均粒径９５μｍ）にエポキシ樹脂２．０％
を加え混合した。この粉末を成形しφ３５．８３×φ３
３．０×ｔ３．２、とφ２１．３９×φ１９．０３×ｔ
４．６、の形状の磁石を得た。[Example] Nd-Fe-B rare earth magnet powder (average particle diameter: 95 μm) prepared by quenching ribbon method with 2.0% epoxy resin.
Was added and mixed. This powder is molded into φ35.83 × φ3
3.0 × t3.2, and φ21.39 × φ19.03 × t
A magnet having a shape of 4.6 was obtained.
【００１６】これらの磁石にロックタイト：ＰＳＭ−１
０Ｅを以下の条件で真空含浸した。Loctite on these magnets: PSM-1
OE was vacuum impregnated under the following conditions.
【００１７】 １．ドライバキューム（５ｍｍＨｇ到達後） ５分 ２．ウェットバキューム ５分 ３．加圧（３Ｋｇ／Ｃｍ2） ５分 ４．水洗浄 ５．硬化、乾燥 ５０℃×６０分 含浸処理前後の、寸法変化を表１に示す。また、エポキ
シ樹脂を上記と同条件で行い（水洗浄の代わりにトリク
ロロエタン洗浄を行う）、比較例とした。1. Driver vacuum (after reaching 5 mmHg) 5 minutes 2. Wet vacuum 5 minutes 3. Pressurization (3 Kg / Cm 2 ) 5 minutes 4. Washing with water 5. Curing and drying 50 ° C. × 60 minutes Table 1 shows the dimensional changes before and after the impregnation treatment. In addition, the epoxy resin was treated under the same conditions as above (trichloroethane cleaning instead of water cleaning), and used as a comparative example.
【００１８】[0018]
【表１】 [Table 1]
【００１９】表１より嫌気性接着剤含浸品は、ほとんど
寸法変化が無い事がわかる。エポキシ樹脂含浸品は、
０．１〜０．２程度の変化があり安定しない。From Table 1, it can be seen that the anaerobic adhesive-impregnated product shows almost no dimensional change. Epoxy resin impregnated products are
There is a change of about 0.1 to 0.2 and it is not stable.
【００２０】また表２に含浸による強度変化を示す。Table 2 shows the change in strength due to impregnation.
【００２１】[0021]
【表２】 [Table 2]
【００２２】そして、φ２１．３９×φ１９．０３×ｔ
４．６のサンプルにエポキシコーティングを行った際の
妨錆力を調べた。条件は、８０℃×９０％ＲＨにて行っ
た。Then, φ21.39 × φ19.03 × t
The rust preventive power when the epoxy coating was applied to the sample of 4.6 was examined. The conditions were 80 ° C. × 90% RH.
【００２３】結果を表３に示す。The results are shown in Table 3.
【００２４】[0024]
【表３】 [Table 3]
【００２５】嫌気性接着剤および、エポキシ接着剤含浸
品はコーティング膜厚が薄くても非常に耐食性が良い事
がわかる。これは、含浸による空孔の目止め効果により
コーティングのピンホールがおさえられた為である。ピ
ンホールが無い事より発塵が抑えられる事もあるといえ
る。It can be seen that the anaerobic adhesive and the product impregnated with the epoxy adhesive have very good corrosion resistance even if the coating film thickness is thin. This is because pinholes in the coating were suppressed by the effect of impregnation of pores due to impregnation. It can be said that dust generation may be suppressed because there is no pinhole.
【００２６】[0026]
【発明の効果】以上述べたように、本発明は、樹脂結合
型磁石に嫌気性接着剤を含浸した事により、耐食性、妨
塵性、強度に優れた高性能な磁石を得ると言う効果を有
する。As described above, according to the present invention, by impregnating a resin-bonded magnet with an anaerobic adhesive, it is possible to obtain a high-performance magnet excellent in corrosion resistance, dust resistance and strength. Have.
【００２７】また、嫌気性接着剤の使用により室温また
は、８０℃以下で硬化するため寸法精度の高い磁石が得
られると言う効果も有している。Further, the use of the anaerobic adhesive has the effect that a magnet with high dimensional accuracy can be obtained because it cures at room temperature or at 80 ° C. or lower.
Claims (3)
に嫌気性樹脂を含浸した事を特徴とした樹脂結合型磁
石。1. A resin-bonded magnet, characterized in that pores inside the magnet are impregnated with an anaerobic resin.
ことを特徴とした請求項１記載の樹脂結合型磁石。2. The resin-bonded magnet according to claim 1, wherein a rare earth magnet alloy is used as a magnet raw material.
を主成分とした合金を用いることを特徴とした請求項１
記載の樹脂結合型磁石。3. The rare earth magnet alloy is an alloy containing a rare earth metal and iron as a main component.
The resin-bonded magnet described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4248184A JPH0696924A (en) | 1992-09-17 | 1992-09-17 | Resin-bonded magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4248184A JPH0696924A (en) | 1992-09-17 | 1992-09-17 | Resin-bonded magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0696924A true JPH0696924A (en) | 1994-04-08 |
Family
ID=17174456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4248184A Pending JPH0696924A (en) | 1992-09-17 | 1992-09-17 | Resin-bonded magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0696924A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5327765B2 (en) * | 2009-02-20 | 2013-10-30 | アルプス・グリーンデバイス株式会社 | Powder core |
| JP2018125517A (en) * | 2017-01-30 | 2018-08-09 | 日立金属株式会社 | Shaft-integrated bonded magnet |
-
1992
- 1992-09-17 JP JP4248184A patent/JPH0696924A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5327765B2 (en) * | 2009-02-20 | 2013-10-30 | アルプス・グリーンデバイス株式会社 | Powder core |
| JP2018125517A (en) * | 2017-01-30 | 2018-08-09 | 日立金属株式会社 | Shaft-integrated bonded magnet |
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