JPH0411701A - Plastic-bonded magnet - Google Patents
Plastic-bonded magnetInfo
- Publication number
- JPH0411701A JPH0411701A JP2111705A JP11170590A JPH0411701A JP H0411701 A JPH0411701 A JP H0411701A JP 2111705 A JP2111705 A JP 2111705A JP 11170590 A JP11170590 A JP 11170590A JP H0411701 A JPH0411701 A JP H0411701A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- powder
- magnetic powder
- diameter
- mixed
- 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
- 239000006247 magnetic powder Substances 0.000 claims abstract description 61
- 239000013078 crystal Substances 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 11
- 229910001172 neodymium magnet Inorganic materials 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 7
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 7
- 239000004014 plasticizer Substances 0.000 claims abstract description 6
- 238000004381 surface treatment Methods 0.000 claims abstract description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000007822 coupling agent Substances 0.000 claims abstract description 4
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 4
- 239000010936 titanium Substances 0.000 claims abstract description 4
- 239000004033 plastic Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 8
- 239000008188 pellet Substances 0.000 claims description 6
- 229920005992 thermoplastic resin Polymers 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 239000006082 mold release agent Substances 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 16
- 230000004907 flux Effects 0.000 abstract description 8
- 238000005245 sintering Methods 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007712 rapid solidification Methods 0.000 abstract 1
- 239000006249 magnetic particle Substances 0.000 description 12
- 229910052761 rare earth metal Inorganic materials 0.000 description 6
- 150000002910 rare earth metals Chemical class 0.000 description 6
- 238000000748 compression moulding Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 2
- 229910017495 Nd—F Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012756 surface treatment agent Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
Landscapes
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
１産業上の利用分野］
本発明は、従来のＮｄ−Ｆｅ−Ｂ系磁粉またはＳｍ−Ｃ
ｏ系磁粉の形状の改良及び３１１１１の大きさの異なる
磁粉の組合わせにより、従来のＮｄ−Ｆｅ−Ｂ系プラス
チック磁石または、Ｓｍ−Ｃｏ系プラスチック磁石には
見られない高最大エネルギー積で、かつ高残留磁束密度
を持たせたプラスチック磁石の提案に関する。DETAILED DESCRIPTION OF THE INVENTION 1. Field of Industrial Application] The present invention is based on conventional Nd-Fe-B magnetic powder or Sm-C magnetic powder.
By improving the shape of o-based magnetic powder and combining 31111 magnetic particles of different sizes, it has a high maximum energy product that is not found in conventional Nd-Fe-B-based plastic magnets or Sm-Co-based plastic magnets. This paper concerns a proposal for plastic magnets with high residual magnetic flux density.
［従来の技術］
従来、Ｎｄ−Ｆｅ−Ｂ系磁粉または、ＳｍＣｏ系磁粉を
少量の可塑剤、離型剤を加えて５＊ｇｒ＋とともに混練
した後、このベレットを用１１で、磁場中で射出成形、
または磁場中で圧縮成形することにより５Ｍ土類プラス
チ・ツクボンデット磁石を加工していた。[Prior art] Conventionally, Nd-Fe-B magnetic powder or SmCo magnetic powder is mixed with 5*gr+ with a small amount of plasticizer and mold release agent, and then the pellet is injected in a magnetic field using a machine 11. molding,
Alternatively, 5M earth plastic bonded magnets were processed by compression molding in a magnetic field.
しかし、従来の段階では、その磁気特性であるＢＨｍａ
ｘとＢｒ とは、第１表のような特性値が限度で、これ
以上特性を改良することが困難であった。However, at the conventional stage, its magnetic properties, BHma
The limits for x and Br are the characteristic values shown in Table 1, and it has been difficult to improve the characteristics further.
射出成形の場合 ４１ＧＯｅ ４５００Ｇ（磁
気等方性）
圧縮成形の場合 １５１ＧＯｅ ８５００Ｇ（磁
気異方性）
また、これら最大エネルギー積（ＢＨｍａｘ） 残留
磁束密度（Ｂｒ）をそれぞれの稀土類焼結磁石の特性に
近づけるため、上記、稀土類プラスチックボンデット磁
石を成形加工ｆ＆、ＩＩＩｆを蒸発させ、稀土類焼結磁
石の組織構造に近づける方法が取られた。For injection molding: 41GOe 4500G (magnetic isotropy) For compression molding: 151GOe 8500G (magnetic anisotropy) Also, bring these maximum energy products (BHmax) and residual magnetic flux density (Br) close to the characteristics of each rare earth sintered magnet. Therefore, a method was adopted in which the above-mentioned rare earth plastic bonded magnet was molded to evaporate f&, IIIf to make the structure approximate to that of a rare earth sintered magnet.
しかし、このように樹脂を蒸発させることにより ａ械
強度が低下し、稀土類焼結磁石より鈍くなる結果となっ
ていた。However, by evaporating the resin in this way, the a-mechanical strength of the magnet decreased, resulting in the magnet being duller than a rare earth sintered magnet.
１発明が解決しようとする問題点〕
上述のように従来は、Ｎｄ−Ｆｅ−Ｂ系またはＳｍ−Ｃ
ｏ系のプラスチックボンデット磁石の磁気特性（Ｂ ｔ
−ＩＭａｘ、 Ｂｒ）を向上させる方法には 磁気性能
、ａｍ的性能がともに、よく 安定して生産できるもの
がなかった。1 Problems to be Solved by the Invention] As mentioned above, conventionally, Nd-Fe-B or Sm-C
Magnetic properties of o-based plastic bonded magnets (B t
-IMax, Br) There is no method that can produce stable products with good magnetic performance and am performance.
そこで５磁粉囃体の結晶異方性と形状異方性の双方の効
果を利用することにより、磁気特性を向上させ、機械的
には、従来のプラスチックボンデット磁石と同等のもの
にするため、磁粉の充填率を８０Ｗ１％〜９０ｗｔ％と
したものを提供することにある。Therefore, by utilizing the effects of both crystal anisotropy and shape anisotropy of the 5-magnetic powder field, we improved the magnetic properties and made them mechanically equivalent to conventional plastic bonded magnets. It is an object of the present invention to provide a magnetic powder having a filling rate of 80W1% to 90wt%.
［問題を解決するための手段及び伴用」その解決手段と
して、磁粉の磁気特性向上のなめに 結晶異方性効果と
形状異方性効果とを最大限に利用することにある。[Means and companions for solving the problem] The solution is to make maximum use of the crystal anisotropy effect and the shape anisotropy effect to improve the magnetic properties of magnetic particles.
すなわち、Ｎｄ−Ｆｅ−Ｂ系磁粉またＳｍＣｏ系＆ｉ粉
を結晶軸（Ｃ軸）方向に結晶成長させ、結晶ＩＩ（Ｃ１
ｆｉ）径の長さに対する結晶軸（Ｃ軸）の長さのアスペ
クト比を１．１；１〜１；５の加工をすることで、磁粉
として 結晶異方性効果と形状異方性効果を持たせたも
のである。That is, crystals of Nd-Fe-B magnetic powder or SmCo &i powder are grown in the direction of the crystal axis (C axis) to form crystal II (C1
fi) By processing the aspect ratio of the length of the crystal axis (C axis) to the length of the diameter from 1.1:1 to 1:5, the crystal anisotropy effect and shape anisotropy effect can be achieved as magnetic powder. It is what I was given.
焼結法により ｌ造した磁粉の場合、その結晶異方性効
果と形状異方性効果を持った３〜５１１１．Ａｔの磁粉
を母体として、さらに、この磁粉より、形状の小さい１
〜３りの磁粉と１＋ｎｆ４以下の磁粉の３１１１１の磁
粉を希望する磁気特性に合わせた割合で混合し、シラン
カップリング剤で表面処理し、または２ａ面処理はなし
で、少量の可塑剤と離型剤を加えて、８〜２０胃（％の
熱可塑性樹脂または４〜５ｗｔ％の熱硬化性Ｉｍととも
に、混練し、ペレーＩトにする。In the case of magnetic powder produced by the sintering method, 3 to 5111. Using At magnetic powder as a matrix, 1 which is smaller in shape than this magnetic powder is added.
~ 3 magnetic powder and 31111 magnetic powder of 1+nf4 or less are mixed in a ratio that matches the desired magnetic properties, and the surface is treated with a silane coupling agent or without 2a surface treatment, and a small amount of plasticizer and mold release are performed. and mix with 8-20% thermoplastic resin or 4-5 wt% thermoset Im into a pellet.
また、高速固化法により、製造した場合、その結晶異方
性効果と形状異方性効果を持った０ ０５〜Ｏ，］＋＊
Ｐ の磁粉を母体として、さらに、この磁粉より 形状
の小さい０．０３〜０．０５＋ｏ７Ｊｆ７１磁拐と０．
０３ｍ７ｖ以下の磁粉の３種類の磁粉とを希望する磁気
特性に合わせた割合で混合し、シランカップリング剤で
表面処理し、または、表面処理なしで、少量の可塑剤と
＠！１２刑を加えて、８〜２０ｗｔ％の熱可塑性樹脂ま
たは４〜５ｗＬ％の熱硬化性ＶＡ脂とともに、混練し、
ベレットにする。In addition, when manufactured by a high-speed solidification method, it has crystal anisotropy effect and shape anisotropy effect.
P magnetic powder is used as a base material, and 0.03 to 0.05+o7Jf71 magnetic particles, which are smaller in shape than this magnetic powder, are added.
Three types of magnetic powder of 03m7v or less are mixed in a ratio that matches the desired magnetic properties, and the surface is treated with a silane coupling agent, or without surface treatment, with a small amount of plasticizer and @! 12 wt% and kneaded with 8 to 20 wt% thermoplastic resin or 4 to 5 wL% thermosetting VA fat,
Make it into a beret.
さらに、磁場中で、射出成形または、磁場中で圧ｆＩｆ
！Ｌ形することで 残留磁束密度の高い 機械的強度の
強いアラスチ／クボンデント磁石を提供するものである
。Further, in a magnetic field, injection molding or a pressure fIf in a magnetic field is performed.
! The L-shape provides an Araste/Kubondent magnet with high residual magnetic flux density and strong mechanical strength.
特に２本発明では、掻巽方性磁場で励磁して、熱１ＩＴ
ｐ！Ｊ性！１１脂にて、成形するときは、磁粉の含有率
を８０〜９０ｗｔ％にし、磁材ベレットのＨｃの比較的
小さいものを用いることで、本発明の効果を向上させた
。In particular, in the present invention, the heat 1IT is
p! J sex! When molding with No. 11 fat, the effect of the present invention was improved by setting the content of magnetic powder to 80 to 90 wt% and using magnetic pellets with relatively small Hc.
［実施例］
第１［７は本発明に係わるＮｄ−Ｆｅ−Ｂ系の磁粉、ま
たはＳｍ−Ｃｏ系の磁粉の０面径りに対するＣ軸長さし
の比（アスペクト比）を、１１から１．５にしたものの
磁粉構造を示すものである。[Example] 1 [7] is the ratio (aspect ratio) of the C-axis length to the diameter of the zero plane of the Nd-Fe-B magnetic powder or the Sm-Co magnetic powder according to the present invention, from 11 to This figure shows the magnetic particle structure of the magnetic powder with a value of 1.5.
このような磁粉構造にすることで、結晶軸方向に磁粉粒
子を結晶成長させることになり、結晶軸方向に結晶異方
性効果が発生する。By forming such a magnetic powder structure, the magnetic powder particles are allowed to grow in the crystal axis direction, and a crystal anisotropy effect occurs in the crystal axis direction.
さらに、６面に比し、Ｃ軸が長く取ることになり、結晶
異方性方向と同一方向に、形状異方性効果が発生し、結
晶異方性効果に、さらに形状異方性効果が付加される。Furthermore, since the C-axis is longer than the six planes, a shape anisotropy effect occurs in the same direction as the crystal anisotropy direction. will be added.
以上、説明した磁粉の長い部分の大きさは、焼結法によ
り Ｗ造した場合、
４〜５ ｍ？’であり、さらに、１−３ｍｆｆ）中型５
１１ＩＩＬ１以下の小型の３種類の磁粉を必要とする磁
気特性、機械特性に合わせて、任意の割合に混合する。The size of the long part of the magnetic powder explained above is 4 to 5 m when it is made of W using the sintering method. ', and furthermore, 1-3mff) medium size 5
Three types of small magnetic particles of 11IIL1 or less are mixed in an arbitrary ratio according to the required magnetic properties and mechanical properties.
また、高速固化法により Ｉ遣した場合、０．０５〜０
．１ｓ／Ｊであり５さらに、００３−０．０５ｍｒの中
型、０．０３ｓＦ以下の小型の３種類の磁粉を必要とす
る磁気特性、機械特性に合わせて、任意の割合に混合す
る。In addition, when using the high-speed solidification method, 0.05 to 0
．． 1 s/J 5 Furthermore, three types of magnetic powder, medium size of 0.03 - 0.05 mr and small size of 0.03 sF or less, are mixed in an arbitrary ratio according to the required magnetic properties and mechanical properties.
中型および小型磁粉も５大型磁粉と同じように結晶異方
性、形状異方性の効果を持った磁粉であることが望まし
いが、製法上、加工ができない場合は、結晶異方性効果
並びに形状異方性効果を持たないものてもよい
上記の混合磁粉を０５〜］、５ｗｔ％のチタンカップリ
ング剤、および、またはチタンカップリング剤で表面処
理し
１．０〜２．０ｗｔ％可塑剤および、または０．１へＱ
、５ｗｔ％の離型側とを加４て、８〜２０ｗｔ％の熱可
塑性樹脂または３〜４ｗｔ％の熱硬化性樹脂とともに、
混練し、ペレツトにする以上述べた構成のＮｄ−Ｆｅ−
Ｂ系磁粉、またはＳｍ−Ｃｏ系磁粉と熱可塑性１１１１
．または熱硬化性樹脂とを混練して得たベレットを用い
て、磁場中で射出成形、または圧縮成形した結果、従来
の表面磁束密度の１〜２割の向上が認められた。It is desirable that medium-sized and small-sized magnetic powders have the same effect of crystal anisotropy and shape anisotropy as the 5 large-sized magnetic powders, but if processing is not possible due to the manufacturing method, the effects of crystal anisotropy and shape The above mixed magnetic powder, which may not have an anisotropic effect, is surface-treated with 05~], 5wt% titanium coupling agent, and/or titanium coupling agent, and 1.0~2.0wt% plasticizer and , or Q to 0.1
, 5 wt% of the mold release side, together with 8 to 20 wt% of thermoplastic resin or 3 to 4 wt% of thermosetting resin,
Knead and pelletize Nd-Fe- with the above-mentioned composition.
B-based magnetic powder or Sm-Co-based magnetic powder and thermoplastic 1111
．． Alternatively, as a result of injection molding or compression molding in a magnetic field using a pellet obtained by kneading with a thermosetting resin, an improvement of 10 to 20% over the conventional surface magnetic flux density was observed.
特に、磁場中での異方性効果を増強するため、Ｎｄ−Ｆ
ｅ−Ｂ系磁粉、またはＳｍ−Ｃｏ系磁粉の中で残留磁束
密度（Ｂｒ）が大きく、固有保磁力（ｉＨｃｌの比較的
小さいものを用いた。In particular, to enhance the anisotropy effect in the magnetic field, Nd-F
Among e-B magnetic powders or Sm-Co magnetic powders, those having a large residual magnetic flux density (Br) and a relatively small intrinsic coercive force (iHcl) were used.
上記説明に５可Ｉ！！剤および離型側を磁粉と樹脂の混
線時に 加えることを述べたが、必要に応じて、これら
を除いてもよい
第２図はＮ極５及びＳ極６を磁極として、％異方性着磁
成形をしたときのプラスチック磁石の内部の磁粉の配列
を示したものである。I agree with the above explanation! ! Although it has been mentioned that the agent and the mold release side are added when the magnetic powder and the resin are mixed, they can be omitted if necessary. Figure 2 shows the percentage anisotropic adhesion using N pole 5 and S pole 6 as magnetic poles. This figure shows the arrangement of magnetic particles inside a plastic magnet when magnetically molded.
第ｘｔｇに示す３〜５＋ｓｒ（０、０５−（’ｌ 、
１ｍＨ）の大型の磁粉ｌと１〜３・（＜ （０，０
３〜０．０５ｍ７）中型の磁粉２とｌ＋＊ｒＪ（０，０
３”ｒ１以下の磁粉３がＮ極５ および８極６では磁極
の内部磁界の方向に向かってきれいに配列している。中
性点７．８においては磁粉の配列はない、残留磁束密度
が１〜２割向上したものは第２図のような磁粉配列を示
していた。3~5+sr(0, 05-('l,
1mH) large magnetic powder l and 1~3・(< (0,0
3~0.05m7) medium-sized magnetic powder 2 and l+*rJ(0,0
At the N pole 5 and at the 8 pole 6, the magnetic particles 3 with a diameter of 3" r or less are neatly arranged in the direction of the internal magnetic field of the magnetic pole. At the neutral point 7.8, there is no arrangement of magnetic particles, and the residual magnetic flux density is 1. Those with an improvement of ~20% showed a magnetic particle arrangement as shown in Figure 2.
［発明の効果１
１）本発明のような磁粉構成とすることより、成形した
Ｎｄ−Ｆｅ−Ｂ系プラスチック磁石、またはＳｍ−Ｃｏ
系プラスチック磁石は、従来のものに比べ、磁束密度が
１０％〜２０％も向上させることができた。[Effect of the invention 1 1) By using the magnetic powder structure of the present invention, molded Nd-Fe-B plastic magnets or Sm-Co
The magnetic flux density of the plastic magnets has been improved by 10% to 20% compared to conventional magnets.
２）本発明の大、中、小の磁粉が互いに磁石の中で、（
みあい密度を高めていると同時に磁粉の表面処理剤と熱
可塑性樹脂、または熱硬化性樹脂のカップリングの効果
で結合力が増加し、軸との圧入代０．１ｍｍ程度の強圧
入をしても何等、割れることのない稀土類プラスチック
磁石とすることができた。2) When the large, medium, and small magnetic particles of the present invention are mutually inside the magnet, (
At the same time as increasing the mesh density, the coupling force between the surface treatment agent of the magnetic powder and the thermoplastic resin or thermosetting resin increases, allowing a strong press-fit with a press-fit allowance of about 0.1 mm to the shaft. We were also able to create a rare earth plastic magnet that will never break.
第１図は本発明による磁粉の結晶構造を示す説明図
第２図は本発明に係わる極異方性成形した稀土類プラス
チック磁石の磁粉配列を図形的に示したものである。
１−アスペクト比を持った３〜５１１Ｆ（０，０５〜Ｏ
ｌｌ１ｒ）の磁粉
２−１−３ｍ７Ｖ ＜ｏ、 ０３〜０．０５１１／／
）＋７）中型の磁粉、 ３−１ｍ、ｓ （０，０３ａ、
ａ／ ）以下ノ小型の磁粉、５−Ｎ極、６−５極、７，
８−磁気的に磁粉が配列していない中性部分、
Ｄ−結晶面（０面）の直径、し−結晶軸（Ｃ軸）の長さ
。
出願人 有限会社 力不ツクス
手続補正書
（自発）
平成３年
２月２５ＢFIG. 1 is an explanatory diagram showing the crystal structure of the magnetic powder according to the present invention. FIG. 2 is a graphical illustration of the magnetic powder arrangement of the polar anisotropically molded rare earth plastic magnet according to the present invention. 3~511F (0,05~O
ll1r) magnetic powder 2-1-3m7V <o, 03~0.0511//
)+7) Medium-sized magnetic powder, 3-1m, s (0,03a,
a/) The following small magnetic particles, 5-N pole, 6-5 pole, 7,
8 - Neutral part where magnetic particles are not magnetically aligned, D - Diameter of crystal plane (0 plane), and - Length of crystal axis (C axis). Applicant Limited Liability Liability Procedure Amendment (Voluntary) February 25B, 1991
Claims (1)
晶面の径に対する結晶軸（Ｃ軸）の長さとのアスペクト
比を、１；１〜１；５とし、焼結法により、製造した磁
粉の場合の結晶軸の長さが、３〜５ｍμとした磁粉と、 粉径１〜３ｍμの磁粉と、 粉径１ｍμ以下の磁粉との３種の磁粉についてまた、高
速固化法により、製造した場合の磁粉の結晶軸の長さが
、０．０５〜０．１ｍμとした磁粉と、 粉径０．０３〜０．０５ｍμの磁粉と、 粉径０．０３ｍμ以下の磁粉との３種の磁粉について、 該３種の磁粉を任意の割合に、混合した混合磁粉を製作
し、 該混合磁粉を０．５〜１．５ｗｔ％のシランカップリン
グ剤または、およびチタンカップリング剤で表面処理を
し、 または、表面処理なしのままで、 １．０〜２．０ｗｔ％の可塑剤と、 ０．１〜０．５ｗｔ％の離型剤とを加えて、熱可塑性樹
脂、または、熱硬化性樹脂とともに混練し、さらに、ペ
レットを製造し、 該ペレットを磁場中にて、射出成形または、磁場中にて
、圧縮成形したことを特徴とするプラスチックボンデッ
ト磁石。[Claims] The aspect ratio of the length of the crystal axis (C axis) to the diameter of the crystal plane of Nd-Fe-B magnetic powder or Sm-Co magnetic powder is 1:1 to 1:5, and the Three types of magnetic powders, magnetic powders with a crystal axis length of 3 to 5 mμ, magnetic powders with a powder diameter of 1 to 3 mμ, and magnetic powders with a powder diameter of 1 mμ or less, were also tested at high speed. Magnetic powder whose crystal axis length is 0.05 to 0.1 mμ when produced by the solidification method, magnetic powder with a powder diameter of 0.03 to 0.05 mμ, and magnetic powder with a powder diameter of 0.03 mμ or less For the three types of magnetic powder, a mixed magnetic powder is prepared by mixing the three types of magnetic powder in any ratio, and the mixed magnetic powder is mixed with 0.5 to 1.5 wt% of a silane coupling agent or titanium coupling agent. After surface treatment with a thermoplastic resin, or without surface treatment, by adding 1.0 to 2.0 wt% of a plasticizer and 0.1 to 0.5 wt% of a mold release agent, a thermoplastic resin, Alternatively, a plastic bonded magnet characterized in that it is kneaded with a thermosetting resin, further produced into pellets, and the pellets are injection molded in a magnetic field or compression molded in a magnetic field.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2111705A JPH0411701A (en) | 1990-05-01 | 1990-05-01 | Plastic-bonded magnet |
| PCT/JP1990/000827 WO1991001562A1 (en) | 1989-07-24 | 1990-06-26 | Anisotropic plastic-bonded magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2111705A JPH0411701A (en) | 1990-05-01 | 1990-05-01 | Plastic-bonded magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0411701A true JPH0411701A (en) | 1992-01-16 |
Family
ID=14568066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2111705A Pending JPH0411701A (en) | 1989-07-24 | 1990-05-01 | Plastic-bonded magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0411701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7390579B2 (en) | 2003-11-25 | 2008-06-24 | Magnequench, Inc. | Coating formulation and application of organic passivation layer onto iron-based rare earth powders |
-
1990
- 1990-05-01 JP JP2111705A patent/JPH0411701A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7390579B2 (en) | 2003-11-25 | 2008-06-24 | Magnequench, Inc. | Coating formulation and application of organic passivation layer onto iron-based rare earth powders |
| US8313801B2 (en) | 2003-11-25 | 2012-11-20 | Magnequench, Inc. | Coating formulation and application of organic passivation layer onto iron-based rare earth powders |
| EP2653302A2 (en) | 2003-11-25 | 2013-10-23 | Magnequench, Inc. | Coating formulation and application of organic passivation layer onto iron-based rare earth powders |
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