JPS62229817A - Manufacture of polar anisotropic long molded product - Google Patents
Manufacture of polar anisotropic long molded productInfo
- Publication number
- JPS62229817A JPS62229817A JP61072234A JP7223486A JPS62229817A JP S62229817 A JPS62229817 A JP S62229817A JP 61072234 A JP61072234 A JP 61072234A JP 7223486 A JP7223486 A JP 7223486A JP S62229817 A JPS62229817 A JP S62229817A
- Authority
- JP
- Japan
- Prior art keywords
- polar anisotropic
- magnetic
- magnetic pole
- polarity
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000000696 magnetic material Substances 0.000 claims abstract description 10
- 230000005415 magnetization Effects 0.000 claims abstract description 8
- 238000004513 sizing Methods 0.000 abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 229910000531 Co alloy Inorganic materials 0.000 abstract description 2
- QVYYOKWPCQYKEY-UHFFFAOYSA-N [Fe].[Co] Chemical compound [Fe].[Co] QVYYOKWPCQYKEY-UHFFFAOYSA-N 0.000 abstract description 2
- 229920006395 saturated elastomer Polymers 0.000 abstract 2
- 235000012438 extruded product Nutrition 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 11
- 238000000465 moulding Methods 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 6
- 230000005405 multipole Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0273—Imparting anisotropy
- H01F41/028—Radial anisotropy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0205—Magnetic circuits with PM in general
- H01F7/021—Construction of PM
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は多極に極異方向化した長尺成形品、特にはプラ
スチック磁石を押出成形によって能率よく製造する方法
に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for efficiently manufacturing a long molded article having multiple polarities in different directions, particularly a plastic magnet, by extrusion molding.
近年、工場の自動化におけるロボットやＮＣ機械などの
ほか、コンピュータやＶＴＲなどにおける電子磁気信号
を拾うための磁気へラドに対し、ますます高精度の制御
が要求されるようになってきた。そのため、ステッピン
グモータを用いるサーボ機構（サーボモータ）が大量採
用されるようになり、多極に配向した筒状磁石の需要が
急増している。In recent years, increasingly high-precision control has been required for robots and NC machines used in factory automation, as well as magnetic helads used to pick up electronic magnetic signals in computers and VTRs. For this reason, servo mechanisms (servo motors) using stepping motors have come into widespread use, and the demand for multi-pole oriented cylindrical magnets is rapidly increasing.
（従来の技術と問題点）
従来多極に配向した磁石の製造は、第４図（イ）（ロ）
（ハ）に示すような３方法で行われている。すなわち
（イ）等方性磁石に対し、内周または外周に多極着磁す
る方法（等方性磁石）
（ロ）半径方向に配向した磁石に対し、内周または外周
に多極着磁する方法（径異方性磁石）（ハ）多極着磁器
内で磁気配向させ成形する方法（極異方性磁石）
これら磁石の磁力の大きさは次の順序になる。(Conventional technology and problems) Conventionally, the production of multi-pole oriented magnets is as shown in Figure 4 (a) and (b).
This is done in three ways as shown in (c). In other words, (a) A method in which an isotropic magnet is magnetized with multiple poles on the inner or outer circumference (isotropic magnet) (b) A magnet oriented in the radial direction is magnetized with multiple poles on the inner or outer circumference. Method (diameter anisotropic magnet) (c) Method of magnetically oriented and shaped in a multipolar magnetizer (polar anisotropic magnet) The magnitude of the magnetic force of these magnets is in the following order.
極異方性磁石〉径異方性磁石〉等方性磁石サーボモータ
は、慣性力の小さいものが制御しやすく、同じ力を出す
にも小型の方が好ましい。Polar anisotropic magnet>diameter anisotropic magnet>isotropic magnet A servo motor with a small inertial force is easier to control, and a smaller one is preferable to output the same force.
したがって、小型軽量化のためにはより大きいトルクを
発生できる極異方性磁石が望ましい。Therefore, in order to reduce the size and weight, it is desirable to use a polar anisotropic magnet that can generate a larger torque.
極異方性磁石を製造するには、第３図（イ）（ロ）に示
すように多極着磁器のコイル９をもつ金型ｌＯとコア３
との空間に磁性材料８を装填して着磁し、上下のパンチ
１１でプレスする方法や、特開昭６０−８９７１７によ
る射出成形法があるが、これらは１個の金型で１個の製
品しか得られず生産能率が悪い。To manufacture a polar anisotropic magnet, a mold lO having a coil 9 of a multipolar magnetizer and a core 3 are used as shown in FIGS.
There is a method of loading the magnetic material 8 into the space between the two, magnetizing it, and pressing it with the upper and lower punches 11, and an injection molding method according to Japanese Patent Application Laid-Open No. 60-89717. Only products can be obtained and production efficiency is poor.
（問題解決のための手段）
本発明者らは、この点について研究を重ねた結果、プラ
スチック磁石の押出成形機の吐出部に極異方性配向部材
を設けることにより、配向度の高い多極に極異方化した
長尺成形品を得、これから所望寸法のものを切り出すこ
とによりプラスチック磁石を量産化することに成功し、
本発明を完成させた。(Means for Solving the Problem) As a result of repeated research on this point, the present inventors have discovered that by providing a polar anisotropic orientation member in the discharge part of a plastic magnet extrusion molding machine, a multipolar magnet with a high degree of orientation can be produced. By obtaining a long molded product with polar anisotropy and cutting it into desired dimensions, we succeeded in mass producing plastic magnets.
The present invention has been completed.
（発明の構成）
本発明の要旨とするところは、飽和磁化の大きい磁性材
料からなる磁極板と、これを挟み同じ極どうしが対向す
る永久磁石との組合せからなる極異方性配向部材を、押
出成形機の吐出部に設けることを特徴とする極異方性長
尺成形品の製造方法にある。(Structure of the Invention) The gist of the present invention is to provide a polar anisotropic orientation member consisting of a combination of a magnetic pole plate made of a magnetic material with high saturation magnetization and permanent magnets with the same poles facing each other. A method for manufacturing a polar anisotropic elongated molded product, characterized in that it is provided in a discharge section of an extrusion molding machine.
以下本発明を図面で詳しく説明する。The present invention will be explained in detail below with reference to the drawings.
本発明の方法は、第２図に示すように押出成形機５の押
出側の吐出部６に極異方性配向部材を備えたサイジング
ダイアを設けるものである。このサイジングダイアは第
１図（イ）（ロ）のように永久磁石１とこれを挟む磁極
板２からなる極異方性配向部材を押出成形吐出物の周囲
を囲むように配こしたものであって、保持部４に装着さ
れている。そうすることによって、磁性材料８は押出成
形機のサイジングダイアの吐出口から多極に異方化され
て押し出される。第１図（イ）（ロ）は８極の例である
が、極の数はこれに限られるものではない、磁極板２は
鉄または鉄−コバルト合金のような飽和磁化が１５ＫＧ
以上のものである。In the method of the present invention, as shown in FIG. 2, a sizing diameter equipped with a polar anisotropic orientation member is provided in the discharge section 6 on the extrusion side of the extrusion molding machine 5. This sizing diamond is made by arranging a polar anisotropic orientation member consisting of a permanent magnet 1 and a magnetic pole plate 2 sandwiching the permanent magnet 1 so as to surround the periphery of the extrusion molded product, as shown in Fig. 1 (a) and (b). It is attached to the holding part 4. By doing so, the magnetic material 8 is extruded from the discharge port of the sizing diamond of the extrusion molding machine in a multipolar anisotropic manner. Figure 1 (a) and (b) are examples of eight poles, but the number of poles is not limited to this.The magnetic pole plate 2 is made of iron or iron-cobalt alloy with a saturation magnetization of 15KG.
That's all.
この磁極板の両側に同じ極すなわちＮ極とＮ極またはＳ
極とＳ極の永久磁石を張りつけるように配置する。Same poles on both sides of this magnetic pole plate, that is, N pole and N pole or S pole.
Arrange the pole and south pole permanent magnets so that they are stuck together.
永久磁石の磁気配向方向は隣り合う磁極板どうしが構成
する２等辺三角形の底辺に平行であるか、またはこれを
挟み隣り合う磁極板に対し垂直であることが好ましい（
第１図番矢印参照）。It is preferable that the magnetic orientation direction of the permanent magnet is parallel to the base of the isosceles triangle formed by adjacent magnetic pole plates, or perpendicular to the adjacent magnetic pole plates with this in between (
(See figure 1 number arrow).
永久磁石は、磁極の成形品側端面に１５ＫＧ以上の磁束
が発生するような大きさのもので、保磁力は６ＫＯｅ以
上、残留磁束密度は６ＫＧ以上であり、しかも保磁力と
磁束の温度依存性はいずれも０．１ｚ以下であるのが好
ましい。The permanent magnet has a size that generates a magnetic flux of 15 KG or more on the end face of the magnetic pole on the molded product side, has a coercive force of 6 KOe or more, a residual magnetic flux density of 6 KG or more, and has a temperature dependence of coercive force and magnetic flux. are preferably 0.1z or less.
保磁力が８ ＫＯｅよりも小さければ永久磁石の減磁が
著しくなり、また残留磁束密度が６ＫＧより小さければ
、永久磁石をそれだけ大きくしなければならなくなり、
結果として磁気回路上の磁気漏れが大きくなる。If the coercive force is smaller than 8 KOe, the permanent magnet will be significantly demagnetized, and if the residual magnetic flux density is smaller than 6 KG, the permanent magnet will have to be made that much larger.
As a result, magnetic leakage on the magnetic circuit increases.
温度依存性がＯ，ｔＸより大きいと、成形時の熱減磁が
それだけ大きくなる。したがってできるだけ小さい方が
良い。If the temperature dependence is larger than O, tX, thermal demagnetization during molding becomes correspondingly large. Therefore, it is better to make it as small as possible.
以上の理由から本発明における永久磁石は、希土類系の
Ｓｍ−Ｃｏ磁石が推奨されるが、これに限定されないこ
とはもちろんである。またプラスチック磁石の溶融体を
配向させるための磁界強度は、希土類系の場合、約１０
ＫＯｅ以上が必要であることから磁極板の材質の飽和磁
化強さは、１０ＫＧ以上、好ましくは１５ＫＧ以上が望
ましい、１ＯＫＧ以下のときは、磁極板からの磁気漏れ
が大きくなり、成形品は磁気配向しないおそれがあるの
で避けるべきである。For the above reasons, the permanent magnet in the present invention is recommended to be a rare earth Sm-Co magnet, but it is needless to say that it is not limited to this. In addition, the magnetic field strength for orienting the melt of a plastic magnet is approximately 10
Since KOe or more is required, the saturation magnetization strength of the material of the magnetic pole plate is preferably 10 KG or more, preferably 15 KG or more. If it is less than 1 OKG, magnetic leakage from the magnetic pole plate will increase, and the molded product will not be magnetically oriented. This should be avoided as there is a risk that it will not occur.
ここでいう磁性材料とは、希土類磁石やフェライトのよ
うな磁石粉と、プラスチック、各種の添加剤や処理剤等
を配合したプラスチック磁石を製造するための原料配合
物を指している。The magnetic material referred to here refers to a raw material mixture for manufacturing a plastic magnet, which is a mixture of magnet powder such as a rare earth magnet or ferrite, plastic, and various additives and processing agents.
また本発明の図面や実施例では円筒状の成形品を例示し
ているが、それ以外の多角形断面の筒状品等への応用が
可使である。Further, although the drawings and examples of the present invention illustrate cylindrical molded products, the present invention can be applied to other cylindrical products with polygonal cross sections.
本発明の方法によれば、長尺の多極に極異方化したプラ
スチック磁石の効率的な製造が可衡となり、産業上の利
用価値はすこぶる大である。According to the method of the present invention, it is possible to efficiently produce a long, multi-pole plastic magnet with polar anisotropy, and its industrial utility value is extremely large.
実施例
磁石粉（Ｒ−３０：信越化学工業製）９１重量％と、軟
質塩ビコンパウンド（ＭＦ−２００：信越化学工業製）
９重量％からなる成形用コンパウンドを７Ａ製した。こ
れを高置鉄工社製の２５φ押出成形機と、第５図に示さ
れる、径方向の角度が７．５°の永久磁石（Ｒ−３０）
と、これを挟む。Example Magnet powder (R-30: Shin-Etsu Chemical Co., Ltd.) 91% by weight and soft PVC compound (MF-200: Shin-Etsu Chemical Co., Ltd.)
A molding compound containing 9% by weight was made from 7A. This was carried out using a 25φ extrusion molding machine manufactured by Takaki Tekko Co., Ltd. and a permanent magnet (R-30) with a radial angle of 7.5° as shown in Figure 5.
And put this in between.
同じく径方向の角度が７．５′″の磁極板（純鉄）を構
成単位とする２４極からなる極異方性配向部材を備えた
、１８φＸ１６φＸ５０Ｌｍｍのサイジングダイを用い
、成形条件として、ダイ温度１５０℃、スクリュー回転
数６ Ｏｒ、ｐ、ｍで押出し成形を行なった。A sizing die of 18 φ x 16 φ x 50 L mm, equipped with a polar anisotropic orientation member consisting of 24 poles whose constituent unit is a magnetic pole plate (pure iron) with a radial angle of 7.5'' was used, and the die temperature was set as the molding condition. Extrusion molding was performed at 150° C. and screw rotation speed of 6 Or, p, m.
これにより得られた長尺成形品の一部を切り出し外周部
の磁束をガウスメーターにより測定したところ、第６図
に示すように２ＫＧの非常に高いオープンフラックスを
有する多極着磁の筒状成形体が得られた。A part of the obtained long molded product was cut out and the magnetic flux at the outer periphery was measured using a Gauss meter. As shown in Figure 6, the multi-pole magnetized cylindrical molded product had a very high open flux of 2KG. I got a body.
第１図（イ）（ロ）は本発明による極異方性配向部材の
構造と磁気配向を示す説明図、第２図は本発明による極
異方性配向部材を愉えたサイジングダイを設けた押出形
成機の側面図、第３図（イ）（ロ）は極異方性配向装置
の説明図、第４図（イ）（ロ）（ハ）は各種筒状磁石の
説明図、第５図（イ）（ロ）は実施例に用いた磁場サイ
ジングダイの要部を示す断面説明図、第６図は成形品の
オープンフラックスの測定結果を示す図である。
１・−・永久磁石、 ２拳・・磁極板、３・・・コア、
４・・・保持部、８・−・磁性材料、 ９・・・
コイル。
１０・・・金型、 １１・・・パンチ。
特許出願人 信越化学工業株式会社
代理人・弁理士 山 本 亮 −ニア７）。
ニー５１．−、Ｈ
第１図
第２図
第３図
第４図
第５図
（イ）
（ロ）
第６図
手続補正書
昭和６２年 ４月１６日
特許庁長官 黒 １）明 雄 殿
２、発明の名称
極異方性長尺成形品の製造方法
３、補正をする者
事件との関係 特許出願人
名 称 （２０６）信越化学工業株式会社４、代理人
「自発」
６、補正の対象
ｌ）明細書第１ページの「特許請求の範囲」を別紙のと
おりに補正する。
２）同第３ページ、下から第３行の「押出成形機の吐出
部に設ける」をｒ押出成形機の吐出部に設けてなる成形
装置で、磁性粉を含む成形用コンパウンドを押出成形す
る１に補正する。
３）同第６ページ、第１５行の「実施例」をｒ実施例１
１に補正する。
４）同上ページ、第１６〜１７行の「９１重量％」をｒ
９１重量％（５８ｖｏ１％）」に補正する。
５）同上ページ、第１８行の「９重量％からなる」を１
９重量％（４２ｖｏ１％）とを均一に攪拌混合し１に補
正する。
６）同第７ページ、第４〜５行の「サイジングダイ」を
ｒサイジングダイ（表面磁束１０ＫＧ）Ｊに補正する。
７）第７ページ、第５〜６行の「ダイ温度１５０℃・・
・・押出し成形」をｒ押出機の温度１５０℃、スクリュ
ー回転数６０ ｒ、ｐ、ｍ、でダイ温度５０℃以下に水
冷保持し押出し成形ｊと補正する。
８）第７ページ、第１２行のあとに下記を追加する。
ｒ比較例１
実施例１で使用した同じコンパウンドを、実施例１の押
出機において極異方性配向部材を備えたサイジングダイ
の代りに同じ寸法の通常の成形用ダイを使用し長尺チュ
ーブを押出し成形した。得られたチューブを長さ２０ｍ
ｍに切り取り、内径１８．１＋ｎｍの２４極多極着磁ヨ
ークを用いて６００μＦＸ２０００Ｖで着磁した。この
ものの表面磁束をガウスメーターで測定したところ平均
１．０ＫＧであった。
実施例２
磁石粉（Ｒ−３０） ５５ ｖｏ１％とポリエステルエ
ラストマー４５ｖｏ１％とを３００ｍ１ニーダ−で２２
０℃／１０分間混練し成形用コンパウンドを調整した。
これを実施例１で使用した押出機を用いて同様に押出し
成形した。この場合の押出条件は押出機温度２５０℃、
スクリュー回転数４０ ｒ、ｐ、ｍ、サイジングダイ温
度を５０℃以下に水冷保持した。得られた成形品の表面
磁束をガウスメーターで測定したところ平均１．８ＫＧ
が得られた。
比較例２
実施例２で使用した同じコンパウンドを、比較例２で使
用した同じ成形機を用い、同じ寸法の長尺チューブを押
出し成形した。得られたチューブを長さ２０ｍｍに切り
取り、内径１８．１ｍｍの２４極多極着磁ヨークを用い
て６００μＦ×２０００Ｖで着磁した。このものの表面
磁束をガウスメーターで測定したところ平均０．９ＫＧ
であった。１
特許請求の範囲
飽和磁化の大きい磁性材料からなる磁極板と、これを挟
み同じ極どうしが対向する永久磁石との組合せからなる
極異方性配向部材を、押ことを特徴とする極異方性長尺
成形品の製造方法。Figures 1 (a) and (b) are explanatory diagrams showing the structure and magnetic orientation of the polar anisotropic orientation member according to the present invention, and Figure 2 is a diagram showing a sizing die that can be used with the polar anisotropic orientation member according to the present invention. A side view of the extrusion forming machine, Figures 3 (a) and (b) are explanatory diagrams of the polar anisotropic orientation device, Figures 4 (a), (b), and (c) are explanatory diagrams of various cylindrical magnets, and Figure 5 Figures (a) and (b) are cross-sectional explanatory views showing the main parts of the magnetic field sizing die used in the examples, and Fig. 6 is a view showing the measurement results of the open flux of the molded product. 1.--Permanent magnet, 2.-Magnetic pole plate, 3.--Core,
4... Holding part, 8... Magnetic material, 9...
coil. 10... Mold, 11... Punch. Patent applicant Shin-Etsu Chemical Co., Ltd. agent/patent attorney Ryo Yamamoto (Nia 7). Knee 51. -, H Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 (a) (b) Fig. 6 Procedural amendment April 16, 1988 Commissioner of the Patent Office Black 1) Akio Tono 2, Invention Name: Method for manufacturing polar anisotropic long molded products 3. Relationship with the case of the person making the amendment Name of patent applicant (206) Shin-Etsu Chemical Co., Ltd. 4. Agent “Volunteer” 6. Subject of amendment l) Specification The "Scope of Claims" on the first page is amended as shown in the attached sheet. 2) On the third page of the same page, in the third line from the bottom, "provided at the discharge section of the extrusion molding machine" is used to extrude a molding compound containing magnetic powder using a molding device that is installed at the discharge section of the extrusion molding machine. Correct to 1. 3) Replace “Example” on page 6, line 15 with Example 1.
Correct to 1. 4) On the same page, replace “91% by weight” in lines 16-17 with r
91% by weight (58vo1%). 5) On the same page, in line 18, change “consisting of 9% by weight” to 1
9% by weight (42vol. 1%) are uniformly stirred and mixed and corrected to 1. 6) Correct the "sizing die" on the 7th page, lines 4 and 5 to r sizing die (surface magnetic flux 10 KG) J. 7) Page 7, lines 5-6, “Die temperature 150℃...
...Extrusion molding is corrected to extrusion molding by extrusion molding at a temperature of 150°C in an extruder, a screw rotation speed of 60 r, p, m, and water cooling at a die temperature of 50°C or less. 8) Add the following after the 12th line on the 7th page. r Comparative Example 1 The same compound used in Example 1 was used in the extruder of Example 1 to form a long tube using a normal molding die of the same size instead of the sizing die equipped with a polar anisotropic orientation member. Extruded. The length of the obtained tube is 20m.
It was cut out to a length of 1.5 m and magnetized at 600μFX2000V using a 24-pole multipole magnetization yoke with an inner diameter of 18.1+nm. The surface magnetic flux of this material was measured with a Gaussmeter and found to be 1.0 KG on average. Example 2 Magnet powder (R-30) 55 vol % and polyester elastomer 45 vol 1% were mixed in a 300 ml kneader at 22
A molding compound was prepared by kneading at 0°C for 10 minutes. This was extruded in the same manner as in Example 1 using the extruder. In this case, the extrusion conditions are: extruder temperature 250°C;
The screw rotation speed was 40 r, p, m, and the sizing die temperature was maintained at 50° C. or less under water cooling. The surface magnetic flux of the obtained molded product was measured with a Gaussmeter and found to be 1.8 KG on average.
was gotten. Comparative Example 2 The same compound used in Example 2 was extruded into a long tube of the same size using the same molding machine used in Comparative Example 2. The obtained tube was cut to a length of 20 mm and magnetized at 600 μF x 2000 V using a 24-pole multipole magnetizing yoke with an inner diameter of 18.1 mm. The surface magnetic flux of this object was measured with a Gaussmeter and averaged 0.9KG.
Met. 1 Claims A polar anisotropic device characterized by pressing a polar anisotropic orientation member consisting of a combination of a magnetic pole plate made of a magnetic material with high saturation magnetization and permanent magnets with the same poles facing each other. A method for manufacturing a long molded product.
Claims (1)
を挟み同じ極どうしが対向する永久磁石との組合わせか
らなる極異方性配向部材を、押出成形機の吐出部に設け
ることを特徴とする極異方性長尺成形品の製造方法。1. A polar anisotropic orientation member consisting of a combination of a magnetic pole plate made of a magnetic material with high saturation magnetization and permanent magnets with the same poles facing each other with the magnetic pole plate sandwiched therebetween is provided in the discharge section of the extrusion molding machine. A method for manufacturing a polar anisotropic long molded product.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61072234A JPH0624176B2 (en) | 1986-03-29 | 1986-03-29 | Method for producing polar anisotropic long molded products |
| DE8787400682T DE3769823D1 (en) | 1986-03-29 | 1987-03-26 | METHOD FOR PRODUCING AN EXTRUDED PLASTIC MAGNETIC STICK OF CONTINUOUS LENGTH AND WITH MULTIPOLE RANGE MAGNETIZATION. |
| EP19870400682 EP0240420B1 (en) | 1986-03-29 | 1987-03-26 | A method for manufacturing a continuous-length extruded bar of plastic magnet with circumferentially multipolar magnetization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61072234A JPH0624176B2 (en) | 1986-03-29 | 1986-03-29 | Method for producing polar anisotropic long molded products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62229817A true JPS62229817A (en) | 1987-10-08 |
| JPH0624176B2 JPH0624176B2 (en) | 1994-03-30 |
Family
ID=13483384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61072234A Expired - Lifetime JPH0624176B2 (en) | 1986-03-29 | 1986-03-29 | Method for producing polar anisotropic long molded products |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0240420B1 (en) |
| JP (1) | JPH0624176B2 (en) |
| DE (1) | DE3769823D1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1301602C (en) * | 1987-11-18 | 1992-05-26 | Vijay K. Chandhok | Method and assembly for producing extruded permanent magnet articles |
| US6304162B1 (en) * | 1999-06-22 | 2001-10-16 | Toda Kogyo Corporation | Anisotropic permanent magnet |
| GB2380309B (en) * | 2001-08-20 | 2005-04-06 | Richard Wolfe | Magnetic device for reduction of electromagnetic interference (EMI) in audio circuitry |
| JP7030290B2 (en) * | 2018-04-27 | 2022-03-07 | 国立大学法人 新潟大学 | Method for manufacturing a resin molded product having anisotropy |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59226367A (en) * | 1983-06-08 | 1984-12-19 | Hitachi Metals Ltd | Production of anisotropic magnet roll |
| JPS60182710A (en) * | 1984-02-29 | 1985-09-18 | Yamauchi Rubber Ind Co Ltd | Magnetic-force sizing method and magnetic-force sizing die |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3640657A (en) * | 1967-11-21 | 1972-02-08 | Robert L Rowe | Apparatus for extruding cylindrical magnets |
-
1986
- 1986-03-29 JP JP61072234A patent/JPH0624176B2/en not_active Expired - Lifetime
-
1987
- 1987-03-26 DE DE8787400682T patent/DE3769823D1/en not_active Expired - Fee Related
- 1987-03-26 EP EP19870400682 patent/EP0240420B1/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59226367A (en) * | 1983-06-08 | 1984-12-19 | Hitachi Metals Ltd | Production of anisotropic magnet roll |
| JPS60182710A (en) * | 1984-02-29 | 1985-09-18 | Yamauchi Rubber Ind Co Ltd | Magnetic-force sizing method and magnetic-force sizing die |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0624176B2 (en) | 1994-03-30 |
| EP0240420B1 (en) | 1991-05-08 |
| DE3769823D1 (en) | 1991-06-13 |
| EP0240420A1 (en) | 1987-10-07 |
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