JPS62251109A - Molding orientation device - Google Patents
Molding orientation deviceInfo
- Publication number
- JPS62251109A JPS62251109A JP9471386A JP9471386A JPS62251109A JP S62251109 A JPS62251109 A JP S62251109A JP 9471386 A JP9471386 A JP 9471386A JP 9471386 A JP9471386 A JP 9471386A JP S62251109 A JPS62251109 A JP S62251109A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- cavity
- flows
- mold
- coil
- 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
- 238000000465 moulding Methods 0.000 title claims abstract description 17
- 230000005291 magnetic effect Effects 0.000 claims abstract description 38
- 239000011347 resin Substances 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 10
- 230000004907 flux Effects 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 7
- 239000003302 ferromagnetic material Substances 0.000 abstract description 4
- 239000006247 magnetic powder Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000007493 shaping process Methods 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、樹脂磁石の材料を溶融状態（こしつつ磁場を
かけ異方性樹脂磁石を成形配向する成形配向装置に関し
、より詳しくは発生した磁場が効率よく樹脂磁石の異方
性配向に使用され、多数の樹脂磁石が１度に製造される
成形配向装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a molding orienting device that molds and orients an anisotropic resin magnet by applying a magnetic field while melting the material of a resin magnet. The present invention relates to a molding and orientation apparatus in which a magnetic field is efficiently used for anisotropic orientation of resin magnets, and a large number of resin magnets are manufactured at one time.
（従来の技術）
従来の異方性樹脂磁石を成形配力する成形配向装置は、
例えばラジアル配向の成形装置として菓３図に示すよう
なものである。(Conventional technology) A conventional molding and orientation device that molds and distributes anisotropic resin magnets is
For example, a radial orientation molding device is shown in Fig. 3.
第３図の装置は、タイバー１こより結合されている固定
側プラテンと可動側プラテンとの間に樹脂磁石が成形配
向されるキャビティーを有する金型か設Ｍされでなり、
該キャビティーにかける磁場を発生させるコイルを金型
の周囲に配するような成形配向装置であって、１はタイ
バー、２はコイル、４はキャビティー、６は強磁性体で
ある円筒材、７ａは固定側プラテン、７ｂは可動側プラ
テン、９は非磁性体である円柱材である。The apparatus shown in FIG. 3 is equipped with a mold having a cavity in which a resin magnet is molded and oriented between a fixed platen and a movable platen that are connected by one tie bar.
A molding orienting device in which a coil for generating a magnetic field to be applied to the cavity is arranged around a mold, 1 is a tie bar, 2 is a coil, 4 is a cavity, 6 is a cylindrical material that is a ferromagnetic material, 7a is a stationary platen, 7b is a movable platen, and 9 is a non-magnetic cylindrical member.
また従来の装置の別の態様として、プラテン内にコイル
を内蔵したものや、金型内に電磁石コイルを内蔵したも
のや、ざらに配向力を高めるために硬磁性材料を金型内
に内蔵したものがあった。Other types of conventional devices include those with a coil built into the platen, electromagnetic coils built into the mold, and hard magnetic materials built into the mold to increase the rough orientation force. There was something.
またコイルの内側に強磁性ブロックを内接させその上部
に金型を取付る場合もあった。In some cases, a ferromagnetic block was inscribed inside the coil and a mold was attached to the top of the block.
コイルは第３図中可動側プラテン７ｂのみならず固定側
プラテン７ａにも取付けられる場合があるが、その場合
はスペースの問題から通常は、可動側より巻数の少ない
ものが使用されている。このような構造の場合、磁束は
まず可動側プラテン７ｂに流れプラテンとの設置部分か
ら金型内に流れ込む。The coil may be attached not only to the movable platen 7b in FIG. 3 but also to the fixed platen 7a, but in this case, due to space considerations, a coil having fewer turns than the movable platen is usually used. In the case of such a structure, the magnetic flux first flows into the movable platen 7b and flows into the mold from the part where the platen is installed.
（発明が解決しようとする問題点）
しかし上記のような構造の成形配向装置においては下記
のような問題点があった。(Problems to be Solved by the Invention) However, the forming orienting apparatus having the above structure has the following problems.
（１）、コイルの起磁力を上げてゆくと、コイルの内側
においてスラスト方向（キャビティーの中心方向）への
漏れ磁束が多くなり有効磁束が減少すると共に、漏れ磁
束の影響によりキャビティー内に発生している異方性配
向磁場がスラスト方向（こねしられでしまい、成形品（
樹脂磁石）の磁気性能の低下を招いてしまう。(1) As the magnetomotive force of the coil increases, leakage magnetic flux increases in the thrust direction (toward the center of the cavity) inside the coil, and the effective magnetic flux decreases. The generated anisotropic orientation magnetic field is twisted in the thrust direction (kneaded), and the molded product (
(Resin magnets) may deteriorate in their magnetic performance.
（２）、コイルが可動側プラテンにだけ設Ｈされでいる
場合は、キャビティーまでの磁束の距離が可動側プラテ
ン経路と固定側プラテン経路で異なるため、又可動側と
固定側の両方にコイルが設置されている場合は固定側可
動側両方の電源が必要であるとともに、コイルの巻数が
異なるためにキャビティー外周にて集結するＮ極とＳ極
の磁気抵抗のアンバランスが生じるために、磁束がキャ
ビティー内を通らずにリークしてしまい、成形品の磁気
性能が低下する。(2) If the coil is installed only on the movable platen, the distance of the magnetic flux to the cavity is different between the movable platen path and the fixed platen path, and the coil is installed on both the movable side and the fixed side. is installed, a power supply is required for both the fixed side and the movable side, and because the number of turns of the coil is different, there is an imbalance in the magnetic resistance of the north and south poles that gather around the outer circumference of the cavity. Magnetic flux does not pass through the cavity and leaks, reducing the magnetic performance of the molded product.
（３）、プラテンにコイルを設置した場合は、金型を設
置すべきプラテン面上の有効面積が減るため、複数のキ
ャビティーを有する多数個取りの金型は設置できず、内
部配線も困難であり、またコイル内部に強磁性ブロック
を内接させる場合はますます装置内のデーライトが限ら
れでしい、さらζこタイバーに磁束が漏れ易い。(3) If a coil is installed on the platen, the effective area on the platen surface where the mold should be installed will be reduced, making it impossible to install a multi-cavity mold with multiple cavities and making internal wiring difficult. Moreover, when a ferromagnetic block is inscribed inside the coil, the daylight inside the device becomes increasingly limited, and magnetic flux tends to leak through the tie bars.
（４）、コイルに囲まれているので、金型の寸法やタイ
プが限定され互換性に乏しい。(4) Since it is surrounded by coils, the size and type of the mold are limited and compatibility is poor.
〔発明の目的）
本発明は上記問題点に鑑み成されたものであり、その目
的は従来の問題点を解決し、１度の成形配向て多数の磁
気特性の優れた異方性樹脂磁石を得ることが可能で、冷
却装置や印加電流制御装置等の装置を必要とせす、金型
の互換性のよい成形配向装置を提供することにある。[Object of the Invention] The present invention was made in view of the above-mentioned problems, and its purpose is to solve the conventional problems and to produce a large number of anisotropic resin magnets with excellent magnetic properties by one molding orientation. It is an object of the present invention to provide a molding orienting device which can be obtained easily and which requires devices such as a cooling device and an applied current control device, and which has good mold compatibility.
本発明の上記目的は、タイバーにより結合されている固
定側プラテンと可動側プラテンとの間に樹脂磁石か成形
配向される複数のキャビティーを有する金型が設Ｈされ
てなり、該キャビティーにかける磁場を発生させるコイ
ルを有する成形配向装置であって、該コイルが該タイバ
ー上の該固定側プラテン側と該可動側プラテン側の両方
において相互に対向磁場を発するように巻かれてなり、
該タイバー上の前記両方のコイルの中間部分と該複数の
キャビティーのそれぞれの内部を直接磁気的に結び該タ
イバー上をスライド可能な強磁性板を有する成形配向装
置によって達成される。The above object of the present invention is to provide a mold having a plurality of cavities in which resin magnets are molded and oriented between a fixed platen and a movable platen which are connected by tie bars, A forming orienting device having a coil that generates an applied magnetic field, the coil being wound so as to generate mutually opposing magnetic fields on both the fixed platen side and the movable platen side on the tie bar,
This is achieved by a shaping and orientation device having a ferromagnetic plate that directly magnetically connects the intermediate portions of both coils on the tie bar and the inside of each of the plurality of cavities and is slidable on the tie bar.
以下、本発明を図面を参照にしつつ説明する。The present invention will be described below with reference to the drawings.
第１図は本発明の態様例であり射出成形により１度に８
個のラジアル異方性配向樹脂磁石を成形する装Ｍを示し
ている。Figure 1 shows an example of the embodiment of the present invention, in which 8 parts are molded at one time by injection molding.
This figure shows a device M for molding radially anisotropically oriented resin magnets.
第１図中、１はクイバー、２はコイル、３は強磁性板、
４はすべてキャビティー、５は（磁束漏れを防ぐ）非磁
性体の側板、６は強磁性体である円筒材、７ａは固定側
プラテン、７ｂは可動側プラテン、８はランナー、９は
非磁性体である円柱材であり、タイバー１上において固
定側プラテン側と可動側プラテン側の両方にコイルが巻
かれてなる。強磁性板３は、タイバー１の中間部、すな
わち固定側プラテン側のコイルと可動側プラテン側のコ
イルとの間の部分と金型内の複数のキャビティー４のそ
れぞれの内部を磁気的に結んでおり、タイバー１上でス
ライド可能なように設置されている。In Figure 1, 1 is a quiver, 2 is a coil, 3 is a ferromagnetic plate,
4 are all cavities, 5 is a non-magnetic side plate (to prevent magnetic flux leakage), 6 is a ferromagnetic cylindrical material, 7a is a fixed platen, 7b is a movable platen, 8 is a runner, 9 is a non-magnetic material It is a cylindrical body, and has coils wound on both the fixed platen side and the movable platen side on the tie bar 1. The ferromagnetic plate 3 magnetically connects the middle part of the tie bar 1, that is, the part between the coil on the fixed platen side and the coil on the movable platen side, and the inside of each of the plurality of cavities 4 in the mold. It is installed so that it can slide on the tie bar 1.
上記装置においてラジアル異方性配向樹脂磁石を成形す
るには、まず可動側プラテン７ｂを固定側プラテン７ａ
の方向へ移動させ金型を閉じ樹脂磁石成形用のキャビテ
ィー４１Ｆｒ形成後、タイバーの両側に取付けられたコ
イル２のそれぞれに直流電流を両側のコイルが相互に対
向磁場を発するように印加する。その結果、磁束は例え
ば第１図中に矢印で示すようにタイバー１の両側から強
磁性体３に流れ込み、強磁性体３を通ってキャビティー
に達しキャビティー内をラジアル方向に貫通し、強磁性
体である円筒材６に流れ込みプラテン７ａ、７ｂを通っ
てタイバー１にもどって閉ループを形成する。こうして
磁場を発生させているところへ、樹脂磁石の組成物であ
る高分子化合物と磁気異方性磁性粉末の混合物を加熱溶
融状態で充填し磁性粉末をキャビティー内の磁束によっ
て配向させた後、冷却固化させ磁気異方性樹脂磁石を形
成し可動側プラテン７ｂを後退させ金型を開いて成形品
を取り出す。In order to mold a radially anisotropically oriented resin magnet in the above apparatus, first move the movable platen 7b to the fixed platen 7a.
After closing the mold and forming a cavity 41Fr for molding the resin magnet, a direct current is applied to each of the coils 2 attached to both sides of the tie bar so that the coils on both sides generate opposing magnetic fields. As a result, the magnetic flux flows into the ferromagnetic material 3 from both sides of the tie bar 1, as shown by the arrows in FIG. It flows into the cylindrical material 6, which is a magnetic material, passes through the platens 7a and 7b, and returns to the tie bar 1, forming a closed loop. In this way, a mixture of a polymer compound and anisotropic magnetic powder, which is the composition of a resin magnet, is filled into the area where the magnetic field is generated, heated and molten, and the magnetic powder is oriented by the magnetic flux in the cavity. The resin is cooled and solidified to form a magnetically anisotropic resin magnet, and the movable platen 7b is moved back, the mold is opened, and the molded product is taken out.
本発明のような装置においては、コイルがタイバー上に
巻かれて設Ｈされていて金型から離れて位置するために
、コイルから磁束が漏れて金型内のキヤとティーに影響
を及ぼすことかない。In the device of the present invention, since the coil is wound around the tie bar and located away from the mold, magnetic flux leaks from the coil and affects the gear and tee inside the mold. It's fleeting.
また、コイルが、コイルから発生した磁束のキャビティ
ーまでの距離が可動側プラテン経路と固定側プラテン経
路であまり異ならないような位置であるタイバー上に設
Ｈされているため、磁気抵抗のアンバランスが起こらな
い。In addition, since the coil is installed on the tie bar in a position where the distance to the cavity of the magnetic flux generated from the coil is not much different between the movable platen path and the fixed side platen path, there is no imbalance in magnetic resistance. does not occur.
本発明の装置は強磁性板がプラテン上にスライド可能な
ので、種々のサイズや、キャビティーの位置の異なるタ
イプの異なった金型を自由１こ交換できる。Since the device of the present invention allows the ferromagnetic plate to slide on the platen, it is possible to freely exchange different molds of various sizes and types with different cavity positions.
第２図は第１図１こ示す本発明の成形配向装置によって
作成された樹脂磁石の模式図である。FIG. 2 is a schematic diagram of a resin magnet produced by the molding and orientation apparatus of the present invention shown in FIG. 1.
〔発明の効果〕本発明の成形配向装置には・配向度の高
い、磁気特性の優れた異方性樹脂磁石を１度に複数個作
成できる
・金型の互換性に優れでいる
等の効果かある。[Effects of the Invention] The molding orienting apparatus of the present invention has the following effects: - A plurality of anisotropic resin magnets with a high degree of orientation and excellent magnetic properties can be produced at a time - Excellent mold compatibility. There is.
第１図は本発明の成形配向装置の模式側断面図であり、
第２図は第１図に示す成形配向装置によって作成された
樹脂磁石の模式図であり、第３図は従来の成形配向装置
の模式側断面図である。
１：クイバー
２：コイル
３：強磁性板
４：キャビティ−（キャビティー内で成形された樹脂磁
石）
５：非磁性体の側板
６：円筒材
７ａ：固定側プラテン
７ｂ：可動側プラテン
８：ランナー
９：円柱材FIG. 1 is a schematic side sectional view of the molding and orientation apparatus of the present invention,
FIG. 2 is a schematic diagram of a resin magnet produced by the molding and orientation apparatus shown in FIG. 1, and FIG. 3 is a schematic side sectional view of the conventional molding and orientation apparatus. 1: Quiver 2: Coil 3: Ferromagnetic plate 4: Cavity (resin magnet molded inside the cavity) 5: Non-magnetic side plate 6: Cylindrical material 7a: Fixed platen 7b: Movable platen 8: Runner 9: Cylindrical material
Claims (1)
側プラテンとの間に樹脂磁石が成形配向される複数のキ
ャビティーを有する金型が設置されてなり、該キャビテ
ィーにかける磁場を発生させるコイルを有する成形配向
装置であって、該コイルが該タイバー上の該固定側プラ
テン側と該可動側プラテン側の両方において相互に対向
磁場を発するように巻かれてなり、該タイバー上の前記
両方のコイルの中間部分と該複数のキャビティーのそれ
ぞれの内部を直接磁気的に結び該タイバー上をスライド
可能な強磁性板を有することを特徴とする成形配向装置
。A mold having a plurality of cavities in which resin magnets are molded and oriented is installed between a fixed platen and a movable platen that are connected by tie bars, and has a coil that generates a magnetic field applied to the cavities. The forming orienting device includes the coils wound so as to generate mutually opposing magnetic fields on both the fixed platen side and the movable platen side on the tie bar, and in which the coils are wound on both the fixed platen side and the movable platen side on the tie bar, A molding orienting device comprising a ferromagnetic plate that directly magnetically connects the intermediate portion and the inside of each of the plurality of cavities and is slidable on the tie bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9471386A JPS62251109A (en) | 1986-04-25 | 1986-04-25 | Molding orientation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9471386A JPS62251109A (en) | 1986-04-25 | 1986-04-25 | Molding orientation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62251109A true JPS62251109A (en) | 1987-10-31 |
Family
ID=14117787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9471386A Pending JPS62251109A (en) | 1986-04-25 | 1986-04-25 | Molding orientation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62251109A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014027641A1 (en) * | 2012-08-13 | 2014-02-20 | 日立金属株式会社 | Method for producing rare-earth sintered magnet and molding device |
| CN103878913A (en) * | 2014-03-13 | 2014-06-25 | 安徽微威胶件集团有限公司 | Pre-structuring device of magneto-rheological elastomer |
-
1986
- 1986-04-25 JP JP9471386A patent/JPS62251109A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014027641A1 (en) * | 2012-08-13 | 2014-02-20 | 日立金属株式会社 | Method for producing rare-earth sintered magnet and molding device |
| CN104541346A (en) * | 2012-08-13 | 2015-04-22 | 日立金属株式会社 | Method for producing rare-earth sintered magnet and molding device |
| JP5939302B2 (en) * | 2012-08-13 | 2016-06-22 | 日立金属株式会社 | Rare earth sintered magnet manufacturing method and molding apparatus |
| US10176921B2 (en) | 2012-08-13 | 2019-01-08 | Hitachi Metals Ltd. | Method for producing rare-earth sintered magnet, and molding machine therefor |
| CN103878913A (en) * | 2014-03-13 | 2014-06-25 | 安徽微威胶件集团有限公司 | Pre-structuring device of magneto-rheological elastomer |
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