JPS62250620A - Multipole molding orientating mold - Google Patents
Multipole molding orientating moldInfo
- Publication number
- JPS62250620A JPS62250620A JP9230386A JP9230386A JPS62250620A JP S62250620 A JPS62250620 A JP S62250620A JP 9230386 A JP9230386 A JP 9230386A JP 9230386 A JP9230386 A JP 9230386A JP S62250620 A JPS62250620 A JP S62250620A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- mold
- flow
- molding
- generated
- 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
- 238000000465 moulding Methods 0.000 title claims abstract description 24
- 230000005405 multipole Effects 0.000 title abstract description 7
- 230000005291 magnetic effect Effects 0.000 claims abstract description 47
- 239000011347 resin Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 125000006850 spacer group Chemical group 0.000 claims abstract description 15
- 239000004020 conductor Substances 0.000 claims abstract description 6
- 239000003302 ferromagnetic material Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000004907 flux Effects 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000005389 magnetism Effects 0.000 abstract description 3
- 230000005294 ferromagnetic effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〕
本発明は、多極異方性樹脂磁石を成形配向するための金
型に関し、特に小型かつ極数の多い異方性樹脂磁石を成
形配向するための金型に関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a mold for molding and orienting a multipolar anisotropic resin magnet, and in particular, the present invention relates to a mold for molding and orienting a multipolar anisotropic resin magnet, and particularly for molding and orienting a small anisotropic resin magnet with a large number of poles. Regarding molds for
（従来の技術）
従来より樹脂磁石を製造するための様々な金型が考案さ
れているが、最近では樹脂磁石を装着するステッピング
モーター等の小型化に伴ない、特に小型で極数の多い樹
脂磁石が要求されており、そのような樹脂磁石を製造す
るための金型としでは、例えば特開昭５７−１７０５０
１号公報に記載されているような、成形空間を取り囲む
ように磁性体ヨークと非磁性体スペーサーが交互に配置
され外側にコイルを配置した金型や、特開昭６０−３７
１１２号公報に記＠されているように成形空間の周囲に
磁極部を有する配向ヨーク内に導線を設けている金型等
が一般的に知られている。(Prior art) Various molds have been devised for manufacturing resin magnets, but recently, with the miniaturization of stepping motors, etc. to which resin magnets are attached, molds that are particularly small and have a large number of poles have been developed. Magnets are required, and molds for manufacturing such resin magnets are, for example, disclosed in Japanese Patent Application Laid-Open No. 57-17050.
A mold in which a magnetic yoke and a non-magnetic spacer are alternately arranged to surround a molding space and a coil is arranged on the outside as described in Japanese Patent Application Laid-open No. 60-37
As described in Japanese Patent No. 112, there is generally known a mold in which a conducting wire is provided within an orientation yoke having a magnetic pole portion around a molding space.
しかし特開昭５７−１７０５０１号公報に記載の金型は
、大電圧低電流の電源を用いるために、起磁力を大きく
する場合にはコイルのターン数を多くする必要がありコ
イルの収容スペースが大きくなり装着が大型化するとい
う問題点があった。また第３図の模式断面図に示してい
るように非磁性体スペーサーを通過する磁路１ｐの方が
成形空間を通過する磁路２ｐよつもパーミアンスが大き
いためコイルより発生した磁束のかなりの部分が磁路１
ｐに漏洩しでしまい極配向に寄与していないという問題
点があった。また、特開昭６０−３７１１２号公報に記
載の金型は、コイルを装着するスペースが非常に限られ
ているので、小型化、多極化が進むにつれ、細い導線を
使用しなくてはならずターン数も少なくしなくてはなら
ない。そのため、わずか数千アンペアの大電流を瞬間的
に流す場合でもかなりの発熱があり、樹脂磁石を十分配
向させるだけの磁場を発生させることが困難であるとい
う問題点があった。However, since the mold described in JP-A-57-170501 uses a high-voltage, low-current power source, it is necessary to increase the number of coil turns in order to increase the magnetomotive force, and the space for accommodating the coil is limited. There was a problem that the larger the size, the larger the installation would be. Furthermore, as shown in the schematic cross-sectional view of Figure 3, the permeance of the magnetic path 1p passing through the non-magnetic spacer is greater than that of the magnetic path 2p passing through the molding space, so a considerable portion of the magnetic flux generated by the coil is is magnetic path 1
There was a problem in that it leaked to p and did not contribute to polar alignment. In addition, the mold described in JP-A-60-37112 has a very limited space for mounting the coil, so as miniaturization and multipolarization progress, thinner conductive wires must be used and turns are required. The number must also be reduced. Therefore, even when a large current of only several thousand amperes is instantaneously passed, a considerable amount of heat is generated, and it is difficult to generate a magnetic field sufficient to orient the resin magnets.
本発明は上記従来の問題点に鑑み成されたものであり、
その目的は従来よりも小型化、多極化することが可能で
、磁気特性の優れた樹脂磁石を得ることのできる、成形
配向金型を提供することにある。The present invention has been made in view of the above-mentioned conventional problems,
The purpose is to provide a molding orientation mold that can be made smaller and more polarized than before, and that can produce resin magnets with excellent magnetic properties.
本発明の上記目的は、樹脂磁石が成形配向される成形空
間の外周面上に強磁性体よりなる磁極部と良導体よりな
るスペーサーとを交互に配している多極成形配向金型に
よって達成される。The above object of the present invention is achieved by a multipolar molding and orientation mold in which magnetic pole parts made of a ferromagnetic material and spacers made of a good conductor are alternately arranged on the outer peripheral surface of a molding space in which a resin magnet is molded and oriented. Ru.
以下に本発明の多極成形配向金型を実施態様により説明
する。The multi-pole orientation mold of the present invention will be explained below based on embodiments.
第１図は本発明の１実施態様の断面図であり、１は成形
空間、２は良導体よりなるスペーサー、３は抵抗率の高
い強磁性体よりなる磁極部、４はヨーク部、５はコイル
であり、成形空間１の外周面上にスペーサー２と磁極部
３とが交互に配置ざ゛れている。この金型に通電すると
、コイルにより磁極部内に磁界が発生し、スペーサー２
中には渦電流が発生するようになっている。FIG. 1 is a sectional view of one embodiment of the present invention, in which 1 is a molding space, 2 is a spacer made of a good conductor, 3 is a magnetic pole part made of a ferromagnetic material with high resistivity, 4 is a yoke part, and 5 is a coil. Spacers 2 and magnetic pole parts 3 are alternately arranged on the outer peripheral surface of the molding space 1. When this mold is energized, a magnetic field is generated in the magnetic pole part by the coil, and the spacer 2
Eddy currents are generated inside.
コイル５に単発あるいは複数発パルス状電流を流すと、
第２図の拡大図に示すように磁極部内には実線で示すよ
うな成形空間方向（縦方向）の磁束の流れと破線で示す
ような横方向の磁束の流れが発生しようとする。しかし
この時スペーサー２中には渦電流が生じこの渦電流によ
り磁界が発生するために、破線で示す横方向の磁束の流
れは相殺され、磁束はすべて成形空間中に流れ込む。When a single or multiple pulsed current is passed through the coil 5,
As shown in the enlarged view of FIG. 2, a magnetic flux flow in the molding space direction (vertical direction) as shown by a solid line and a horizontal magnetic flux flow as shown by a broken line are generated within the magnetic pole portion. However, at this time, an eddy current is generated in the spacer 2 and a magnetic field is generated by the eddy current, so that the flow of magnetic flux in the horizontal direction shown by the broken line is canceled out, and all the magnetic flux flows into the molding space.
すなわちスペーサー２は磁気を閉じ込める役割を果たし
磁束漏れを防ぐものである。That is, the spacer 2 serves to confine magnetism and prevent leakage of magnetic flux.
本発明の多極成形配向金型の強磁性体よりなる磁極部を
なす材料としては、各種フェライトが用いられ、特にＮ
ｉ系フェライトやＭ９系フェライト等か好適に用いられ
る。Various ferrites are used as the material forming the magnetic pole part made of ferromagnetic material of the multipole orientation mold of the present invention, and in particular, N
I-type ferrite, M9-type ferrite, etc. are preferably used.
磁気を閉じ込めるスペーサー２をなす材料としては、銅
等の電気抵抗の低い性質を有する材料が好適に用いられ
る。As a material for forming the spacer 2 that confines magnetism, a material having low electrical resistance such as copper is suitably used.
本発明の多極成形配向金型は、磁極部間において磁束漏
れが発生しないので、従来よりも磁極部間距離の小ざな
更に小型で極数の多い樹脂磁石を製造するための金型に
適用することができる。The multi-pole orientation mold of the present invention does not cause magnetic flux leakage between the magnetic pole parts, so it can be applied to molds for manufacturing resin magnets that are smaller in size and have a larger number of poles than conventional ones with smaller distances between the magnetic pole parts. can do.
また、コイルが成形空間から距離をおいた外周部に設置
することができるので、スペース的に余裕がありコイル
の巻数を増やして強力な磁界を発生きせることが可能で
ある。同時にコイルに使用する導線は細い線を束ねて太
くすることが可能で発熱を少くすることもできる。Furthermore, since the coil can be installed on the outer periphery at a distance from the molding space, there is plenty of space and it is possible to increase the number of turns of the coil to generate a strong magnetic field. At the same time, the conductor wire used in the coil can be made thicker by bundling thin wires, which can also reduce heat generation.
本発明の多極成形配向金型の磁極部は、磁束の表皮効果
のために磁極部材内部を通る磁束量が少ないため、圧粉
状のものや長細い層状のものを複−敗合わせた積層状の
ものが好ましく用いられる。The magnetic pole part of the multi-pole orientation mold of the present invention is made of a multi-layered laminate made of powder-like materials or elongated layered materials, since the amount of magnetic flux passing through the inside of the magnetic pole member is small due to the skin effect of magnetic flux. Preferably, those having the following shapes are used.
以上のように本発明の多極成形配向金型は、極数が多く
小型の樹脂磁石をも磁気特性を低下させることなく得る
ことが可能であり、磁束漏れがないため印加電流を節約
することができ、コイルの発熱という弊害を防ぐことも
できる。As described above, the multi-pole orientation mold of the present invention can produce small resin magnets with a large number of poles without deteriorating magnetic properties, and can save applied current because there is no magnetic flux leakage. This also prevents the harmful effects of heat generation from the coil.
第１図は、本発明の多極成形配向金型の一寅施態様の模
式断面図であり、第２図は第１図の部分的拡大図であり
、第３図は従来の多極成形配向金型の問題点を説明する
部分的拡大図である。
１：成形空間
１ｐ：磁束の流れ（漏れ）
２：良導体よりなるスペーサー
２ｐ：磁束の流れ
３：強磁性体よりなる磁極部
４：ヨーク部
５：コイル
６：非磁粧体スペーサーFIG. 1 is a schematic sectional view of one embodiment of the multipolar molding orientation mold of the present invention, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a conventional multipolar molding oriented mold. FIG. 2 is a partially enlarged view illustrating a problem with an orientation mold. 1: Molding space 1p: Flow of magnetic flux (leakage) 2: Spacer made of a good conductor 2p: Flow of magnetic flux 3: Magnetic pole part 4 made of ferromagnetic material: Yoke part 5: Coil 6: Non-magnetic spacer
Claims (1)
性体よりなる磁極部と良導体よりなるスペーサーとを交
互に配していることを特徴とする多極成形配向金型。A multipolar molding and orientation mold characterized in that magnetic pole parts made of a ferromagnetic material and spacers made of a good conductor are alternately arranged on the outer peripheral surface of a molding space in which resin magnets are molded and oriented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9230386A JPH0719710B2 (en) | 1986-04-23 | 1986-04-23 | Resin magnet manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9230386A JPH0719710B2 (en) | 1986-04-23 | 1986-04-23 | Resin magnet manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62250620A true JPS62250620A (en) | 1987-10-31 |
| JPH0719710B2 JPH0719710B2 (en) | 1995-03-06 |
Family
ID=14050641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9230386A Expired - Fee Related JPH0719710B2 (en) | 1986-04-23 | 1986-04-23 | Resin magnet manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0719710B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008105261A (en) * | 2006-10-25 | 2008-05-08 | Sumitomo Heavy Ind Ltd | Mold clamping device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013181136A (en) | 2012-03-02 | 2013-09-12 | Fuji Xerox Co Ltd | Polyimide precursor composition, production method of endless belt, and image forming device |
-
1986
- 1986-04-23 JP JP9230386A patent/JPH0719710B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008105261A (en) * | 2006-10-25 | 2008-05-08 | Sumitomo Heavy Ind Ltd | Mold clamping device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0719710B2 (en) | 1995-03-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |