JPH01205506A - Rare earth and iron-based resin-bonded magnet - Google Patents
Rare earth and iron-based resin-bonded magnetInfo
- Publication number
- JPH01205506A JPH01205506A JP3027288A JP3027288A JPH01205506A JP H01205506 A JPH01205506 A JP H01205506A JP 3027288 A JP3027288 A JP 3027288A JP 3027288 A JP3027288 A JP 3027288A JP H01205506 A JPH01205506 A JP H01205506A
- Authority
- JP
- Japan
- Prior art keywords
- iron
- rare earth
- magnet
- resin
- bonded magnet
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 20
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 17
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 17
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 10
- 239000006247 magnetic powder Substances 0.000 claims abstract description 4
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 3
- 239000010941 cobalt Substances 0.000 claims abstract description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 150000003624 transition metals Chemical group 0.000 claims abstract 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000011230 binding agent Substances 0.000 claims abstract 2
- 229910052796 boron Inorganic materials 0.000 claims abstract 2
- 229920005989 resin Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 238000001746 injection moulding Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 229920001187 thermosetting polymer Polymers 0.000 claims 1
- 229910052723 transition metal Inorganic materials 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 239000004734 Polyphenylene sulfide Substances 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 229920000069 polyphenylene sulfide Polymers 0.000 abstract description 5
- 239000004417 polycarbonate Substances 0.000 abstract description 3
- 239000004952 Polyamide Substances 0.000 abstract description 2
- 229920002647 polyamide Polymers 0.000 abstract description 2
- 229920000515 polycarbonate Polymers 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 abstract 1
- 239000004634 thermosetting polymer Substances 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 229920000299 Nylon 12 Polymers 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 125000001874 trioxidanyl group Chemical group [*]OOO[H] 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は磁石の表面を射出成形法により熱可塑性樹脂で
被覆した希土類・鉄系樹脂結合型磁石に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rare earth/iron resin bonded magnet whose surface is coated with a thermoplastic resin by injection molding.
本発明は希土類・鉄系樹脂結合型磁石においてその表面
を射出成形法により熱可塑性樹脂で被覆し、耐食性、耐
候性の優れた磁石を提供することにある。The object of the present invention is to provide a rare earth/iron resin-bonded magnet whose surface is coated with a thermoplastic resin by injection molding, and which has excellent corrosion resistance and weather resistance.
希土類・鉄系樹脂結合型磁石は、希土類・コバルト系の
等方性樹脂結合型磁石と比較し、性能的に５０〜７０％
高いことからその利用度は高い。Rare earth/iron resin bonded magnets have 50 to 70% higher performance than rare earth/cobalt isotropic resin bonded magnets.
Due to its high price, its usage is high.
しかし、希土類・鉄系の樹脂結合型磁石は、基本組成で
ある希土類金属、鉄が空気中の酸素と反応して酸化物を
つくってしまうためモータ、リレー等に組込んだ場合、
酸化物が脱落して故障原因となっている。However, the basic composition of rare earth/iron resin-bonded magnets is that the rare earth metals and iron react with oxygen in the air and create oxides, so when incorporated into motors, relays, etc.
Oxides fall off and cause failure.
従って、希土類・鉄系樹脂結合型磁石の高い磁気性能を
生かすためには、磁石表面を被覆し高い耐食性、耐候性
を付与する必要がある。Therefore, in order to take advantage of the high magnetic performance of rare earth/iron resin bonded magnets, it is necessary to coat the magnet surface to provide high corrosion resistance and weather resistance.
本発明はこうした問題を解決するものであり、その目的
は、熱可塑性樹脂を射出成形法により表面被覆すること
により耐食性、耐候性の優れた希土類・鉄系樹脂結合型
磁石を提供することにある。The present invention solves these problems, and its purpose is to provide a rare earth/iron resin bonded magnet with excellent corrosion resistance and weather resistance by coating the surface with thermoplastic resin by injection molding. .
本発明は希土類・鉄系樹脂結合型磁石の表面に射出成形
法により熱可塑性樹脂を被覆することを特徴とする。こ
こで熱可塑性樹脂とは主に、ポリアミド（Ｐ Ａ、 ）
、ポリフェニレンサイファイド（ＰＰＳ）、ポリカー
ポネー１〜（ＰＣ） 、ポリエチレン（＋）Ｅｌポリプ
ロピレン（ｐｐ） 、及びこれらの樹脂の改良品である
。The present invention is characterized in that the surface of a rare earth/iron resin bonded magnet is coated with a thermoplastic resin by injection molding. Here, thermoplastic resin mainly refers to polyamide (PA, )
, polyphenylene sulfide (PPS), polycarbonate 1 to (PC), polyethylene (+) El polypropylene (pp), and improved products of these resins.
以下、本発明について実施例に基ついて詳細に説明する
。Hereinafter, the present invention will be described in detail based on Examples.
（実施例−１）
急冷薄帯法で作ったＮ ｄ ０． ＋４ （Ｆ ｅ ０
．９４Ｂ ０．０６）０、８６合金の薄膜をボールミル
て微粉砕し粒径１７７μｍ以下の磁性粉を得た。この磁
性粉にエポキシ樹脂１〜３ ｗ ｔ％加え十分に混練し
た後、所定の形に圧縮成形し１５０°Ｃて１時間キュア
ー処理をしてエポキシ樹脂を硬化さぜな。(Example-1) N d 0. made by the quenched ribbon method. +4 (F e 0
．． 94B 0.06) A thin film of 0,86 alloy was pulverized using a ball mill to obtain magnetic powder with a particle size of 177 μm or less. After adding 1 to 3 wt% of epoxy resin to this magnetic powder and thoroughly kneading it, it was compression molded into a predetermined shape and cured at 150°C for 1 hour to harden the epoxy resin.
得られた磁石σ）内周部にジャ７１〜を打ち込み、この
シャツ１〜を基準にして金型ヘセッ１〜し、射出成形法
により磁石の表面にＰＰＳを０．２ｍｍ被覆層を形成さ
せた。表１に本発明による磁石と比較例として被覆をし
ていない磁石、及びエポキシて０．１ｍｍ表面をコーテ
ィングさぜな磁石に後からシャツ１−を打ぢ込み、そｈ
それをモーターに組込み回転試験を湿度９５％、６０°
Ｃの中て行なったときの状況を示す。A magnet 71~ was driven into the inner peripheral part of the obtained magnet σ), and a mold was molded using this shirt 1~ as a reference, and a 0.2 mm coating layer of PPS was formed on the surface of the magnet by injection molding. . Table 1 shows magnets according to the present invention, uncoated magnets as comparative examples, and magnets whose surfaces were coated with 0.1 mm of epoxy.
Incorporate it into the motor and perform a rotation test at 60° at 95% humidity.
This shows the situation when executed in C.
第 １ 表
○モータ移動（サビの発生なし）
△サビによるモーター性能低下（回転ムラ″４）×モー
ター停止り
第１表から明らかな様に射出成形法によりＰ ＰＳ樹脂
で被覆することによって耐食性が飛躍的に改善されモー
ターとしての使用に充分耐えたことがわかる。Table 1 ○Motor movement (no rust) △Deterioration of motor performance due to rust (uneven rotation ″4) × Motor stoppage As is clear from Table 1, corrosion resistance is improved by coating with PPS resin using the injection molding method. It can be seen that it has been dramatically improved and can withstand use as a motor.
（実施例−２）
実施例−１と同様に樹脂結合型磁石を作り、熱可塑性樹
脂として、ナイロン１２（ＰＡ−１２）、ＰＢＴ、ＰＥ
ＥＫを用い、射出成形法により０゜］、 ｍ ／ ｍの
被覆を行った。その後モーターノ＼組込み湿度９５％温
度６０°Ｃ中で回転試験を行なった結果を第２表に示す
。］、 ＯＯＯＨ経過でＰＡ−１２とＰＥＥＫ被覆ザン
プルで表面にわずか錆・変色の発生が認められた。(Example-2) A resin-bonded magnet was made in the same manner as in Example-1, and thermoplastic resins such as nylon 12 (PA-12), PBT, and PE were used.
A coating of 0°], m/m was performed by injection molding using EK. Thereafter, a rotation test was conducted in a motor environment with built-in humidity of 95% and temperature of 60° C. The results are shown in Table 2. ], Slight rust and discoloration was observed on the surface of the PA-12 and PEEK coated samples during the OOOH process.
第 ２ 表 しかし乍ら、機能に影響するものではなかった。Table 2 However, it did not affect functionality.
次に上記サンプルのモータ組込前の磁石について、機械
的強度を測定した。Next, the mechanical strength of the magnet of the above sample before being incorporated into the motor was measured.
第 ３ 表
７磁石サンプルの形状は、φ２１．８Ｘφ１９゜８ Ｘ
８ ｔ″′。リンク形状である。第３表に示すように
、大変強度のすくれていることが判明した。ここて従来
法は、エポキシコーティング層を０．０２ ｍ ｍ被覆
したものである。本発明は、強度、衝撃力に強いので、
他部品とアッセンブルする時に、自動化・対応し易いと
いう、大変生産効率の高い方式を採用てきるメリットが
ある。Table 3 The shape of the magnet sample is φ21.8Xφ19゜8X
8 t'''. It has a link shape. As shown in Table 3, it was found that it was very strong and narrow.The conventional method was to cover it with an epoxy coating layer of 0.02 mm. .The present invention is strong in strength and impact force, so
When assembling with other parts, it has the advantage of being easy to automate and adapt to, which is a highly efficient method of production.
−−Ｏ″″′
以ト、述へなように希土類・鉄系樹脂結合型磁石の表面
を射出成形法にて熱可塑性樹脂て被覆することにより実
用に耐えうる耐食性、耐候性を持つ磁石とすることがて
きた。特にモータのように、回転機等へ実用化する場合
高温、高温環境ドても全く錆の発生をｌ！７ｊ止てきた
。--O''''' As mentioned above, by coating the surface of a rare earth/iron resin bonded magnet with thermoplastic resin using injection molding, a magnet with corrosion resistance and weather resistance that can withstand practical use can be created. I have something to do. Especially when used in rotating machines such as motors, rust will not occur at all even in high temperature environments! 7j has stopped.
また、磁石体の機械的強度を高められるという効果も得
られた。この事によって、生産効率を大「１−Ｊに高め
られた。Moreover, the effect of increasing the mechanical strength of the magnet body was also obtained. As a result, production efficiency was increased to 1-J.
以上 出願人 セイコーエプソン株式会社that's all Applicant: Seiko Epson Corporation
Claims (2)
磁性粉末にバインダーとして熱硬化性樹脂を加え圧縮成
形した磁石の表面を射出成形法により熱可塑性樹脂で被
覆したことを特徴とする希土類・鉄系樹脂結合型磁石。(1) A rare earth/iron magnet whose basic composition is a magnetic powder consisting of rare earth metals, iron, and boron, mixed with a thermosetting resin as a binder, compression molded, and whose surface is coated with a thermoplastic resin by an injection molding method. Resin bonded magnet.
属群から選ばれた少なくとも１種以上の遷移金属群で置
換した第１項記載の希土類・鉄系樹脂結合型磁石。(2) The rare earth/iron resin bonded magnet according to item 1, wherein a part of the iron is replaced with at least one transition metal group selected from the group of transition metals other than iron, such as cobalt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3027288A JPH01205506A (en) | 1988-02-12 | 1988-02-12 | Rare earth and iron-based resin-bonded magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3027288A JPH01205506A (en) | 1988-02-12 | 1988-02-12 | Rare earth and iron-based resin-bonded magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01205506A true JPH01205506A (en) | 1989-08-17 |
Family
ID=12299066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3027288A Pending JPH01205506A (en) | 1988-02-12 | 1988-02-12 | Rare earth and iron-based resin-bonded magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01205506A (en) |
-
1988
- 1988-02-12 JP JP3027288A patent/JPH01205506A/en active Pending
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