JPH06105644B2 - Magnetic control - Google Patents
Magnetic controlInfo
- Publication number
- JPH06105644B2 JPH06105644B2 JP61178050A JP17805086A JPH06105644B2 JP H06105644 B2 JPH06105644 B2 JP H06105644B2 JP 61178050 A JP61178050 A JP 61178050A JP 17805086 A JP17805086 A JP 17805086A JP H06105644 B2 JPH06105644 B2 JP H06105644B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic pole
- shaft
- fan
- magnetic
- 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.)
- Expired - Lifetime
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はPPC複写機、ファクシミリ等電子写真の現像装
置、クリーニング装置等に用いられるマグネットロール
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet roll used in a PPC copying machine, a developing device for electrophotography such as a facsimile, and a cleaning device.
従来の技術 従来これらのマグネットロールとしては、ロール軸の外
周に棒状や円筒状の焼結フェライト磁石を用いて構成さ
れていたが、近年フェライト粉と高分子材料からなる複
合樹脂マグネット材料を用いて構成されるようになって
きた。Conventional technology Conventionally, these magnet rolls were configured by using rod-shaped or cylindrical sintered ferrite magnets on the outer circumference of the roll shaft, but in recent years, composite resin magnet materials composed of ferrite powder and polymer materials have been used. It has come to be composed.
このような複合樹脂マグネット材料を用いた従来のマグ
ネットロールは、カレンダーロールや成形プレスを用い
てフェライト粉を配向させて第３図に示すような扇状の
樹脂マグネットピース１を複数個金属シャフト２に貼り
合わせて第４図のようなマグネットロールとするもの、
あるいは、第５図に示すように中央に金属シャフト２を
配置した磁性金属材料３と非磁性金属材料４とからなる
円筒状キャビティ５を有する磁場成形金型に樹脂マグネ
ット材料を注入し、磁性金属材料３の周囲に設けた磁場
発生用コイル６に電流を流し、磁場成形を行って構成す
るものがあった。A conventional magnet roll using such a composite resin magnet material uses a calender roll or a molding press to orient ferrite powder to form a plurality of fan-shaped resin magnet pieces 1 as shown in FIG. What is stuck together to form a magnet roll as shown in Fig. 4,
Alternatively, as shown in FIG. 5, a resin magnet material is injected into a magnetic field molding die having a cylindrical cavity 5 composed of a magnetic metal material 3 and a non-magnetic metal material 4 in which a metal shaft 2 is arranged in the center, and the magnetic metal is injected. There is a structure in which a magnetic field is formed by applying a current to a magnetic field generating coil 6 provided around the material 3.
発明が解決しようとする問題点 このような従来のマグネットロールでは、いずれの場合
においても、マグネットロールを構成する部材として金
属あるいはプラスチックのシャフト２が不可欠である。
このシャフト２は、極位置基準となるフライス加工部2a
やリング溝2b、更には面取加工部2cなど様々な加工が施
されており、シャフト材料そのものは安価であってもそ
の加工費用が高価で樹脂マグネット材料費よりもシャフ
ト費用の方がはるかに高いものとなりコスト面に大きな
問題があった。又後者の場合シャフト２を樹脂マグネッ
ト材料で一体に成形し、第６図に示すようなマグネット
ロールを得ることが考えられるが、この場合マグネット
部７とシャフト部８に当然径差が発生し、第６図に示す
マグネット両端部Ｘの位置に集中応力が加わり強度的に
充分なものとはならない。又使用する樹脂マグネット材
料はシャフト強度を考慮したものとなり限定される等の
問題があった。Problems to be Solved by the Invention In any of the conventional magnet rolls described above, in any case, the metal or plastic shaft 2 is indispensable as a member constituting the magnet roll.
This shaft 2 is a milling part 2a that serves as a pole position reference.
Various processing such as the ring groove 2b and the chamfered portion 2c has been performed, so even if the shaft material itself is cheap, the processing cost is high and the shaft cost is much higher than the resin magnet material cost. It became expensive and there was a big problem in terms of cost. In the latter case, the shaft 2 may be integrally molded with a resin magnet material to obtain a magnet roll as shown in FIG. 6, but in this case a diameter difference naturally occurs between the magnet portion 7 and the shaft portion 8, Concentrated stress is applied to the positions of both ends X of the magnet shown in FIG. 6, and the strength is not sufficient. Further, there is a problem that the resin magnet material used is limited in consideration of the shaft strength.
問題点を解決するための手段 このような問題点を解決するために本発明は複数の磁性
を有するマグネットロールにおいて、複数磁極ピースの
うち少なくとも１個の磁極ピースとシャフトとをフェラ
イトと高分子材料からなる同一の複合樹脂マグネット材
料で一体に成形し、その周囲に必要数だけの磁極ピース
を貼り合わせる構成としたものである。Means for Solving the Problems In order to solve such problems, the present invention relates to a magnet roll having a plurality of magnetism, and in a magnet roll having a plurality of magnetism, at least one pole piece and a shaft are made of ferrite and a polymer material. The same composite resin magnet material composed of is integrally molded, and a necessary number of magnetic pole pieces are attached to the periphery thereof.
作用 このように複数磁極ピースのうち１個の磁極ピースかシ
ャフトと一体に成形されるため成形金型内に前述の様々
な加工を施すことが可能となり、加工を施した高価なシ
ャフトを必要としない。また、一体構造によるためにシ
ャフトの曲げ強度が例えば樹脂単独シャフトよりも強い
ものとなるほか、シャフトの外周面全てにわたって一体
化されていないため径差となるピース端面での集中応力
が緩和され、更には磁極ピースを基準に他の磁極ピース
を貼り合わすため、極位置のズレ等がなく精度よく組立
てることができる。また、磁極ピースは断面扇状で扇状
円弧部から扇状両側面及び内周に配向されているためロ
ール状とした時に極めて効果的な極配向となるように磁
路が形成されるため高磁力のマグネットロールが得られ
る。As described above, since one of the plurality of magnetic pole pieces is integrally formed with the shaft or the shaft, it is possible to perform the above-described various processes in the molding die, and a processed expensive shaft is required. do not do. In addition, because of the integral structure, the bending strength of the shaft is stronger than, for example, the resin-only shaft, and since it is not integrated over the entire outer peripheral surface of the shaft, the concentrated stress at the piece end surface that causes a diameter difference is alleviated, Further, since the other magnetic pole pieces are attached to each other with the magnetic pole piece as a reference, there is no deviation in the pole position and the like, so that the magnetic pole piece can be assembled accurately. Further, since the magnetic pole piece has a fan-shaped cross section and is oriented from the fan-shaped arc portion to both the fan-shaped both side surfaces and the inner circumference, a magnetic path is formed so as to have an extremely effective pole orientation when formed into a roll shape. Roll is obtained.
実施例 本発明の実施例を第１図〜第２図により説明する。Embodiment An embodiment of the present invention will be described with reference to FIGS.
第２図において９は８極に等分割された対称磁極ピース
成形の下型で８個の断面扇状のキャビティＡ〜Ｈと、そ
のうちの１個はシャフト成形のためのキャビティ10が設
けられ磁性金属材料でできている。11は上記下型９のキ
ャビティＡ〜Ｈに対応する部分に扇状円弧状の凹部12を
設けた上型で、磁性金属材料13及び非磁性金属材料14で
構成されている。15は磁極の中心となるヨークでそれぞ
れ扇状円弧状の凹部12の中央に位置している。この上型
11,下型９の両側にはそれぞれ磁場発生のためのコイル1
6,17が設けられている。In FIG. 2, reference numeral 9 is a lower die for forming a symmetrical magnetic pole piece equally divided into eight poles, and eight cavities A to H having a fan-shaped cross section, and one of them is a magnetic metal provided with a cavity 10 for forming a shaft. Made of material. Reference numeral 11 denotes an upper die having a fan-shaped arcuate concave portion 12 provided in a portion corresponding to the cavities A to H of the lower die 9 and is composed of a magnetic metal material 13 and a non-magnetic metal material 14. Reference numeral 15 is a yoke which is the center of the magnetic pole, and is located in the center of each fan-shaped arc-shaped recess 12. This upper mold
11, coil 1 for magnetic field generation on each side of the lower die 9
6,17 are provided.
上記下型９と上型11を射出成形機に設置し、上型11全て
を同一極とし、下型９全てを対抗極となるようにコイル
16,17で電流を流して磁場を発生させ、フェライト粉と
高分子材料からなる複合樹脂マグネット材料を射出注入
して磁場成形を行い、断面扇状の７個の磁極ピース18〜
24とシャフト25が一体化された１個の磁極ピース26を得
た。発生する磁束は破線で示した方向となり扇状キャビ
ティＡ〜Ｈ内には磁性金属材料の下型9,上型11の磁性金
属材料14及びヨーク４′を介して下型９の扇状側面及び
内周x,y,z方向となりフェライト粉が有効に配向され
る。成型された各磁極ピース18〜24は冷却後脱磁を行
い、シャフト25と一体化された磁極ピース26を基準にし
て磁極ピース18〜24をそれぞれ貼り合わせて外周極数に
対応して８極着磁を行った。得られたマグネットロール
を第１図に示す。磁極ピース26及び18〜24は磁場中射出
成形の他に押出機先端部に同様の金型及び磁場発生手段
を設けた個別に押出成形することは十分可能である。
又、磁極ピース26及び磁極ピース18〜24は要求される磁
気力強度によっては後述する樹脂マグネット材料を適宜
選択することができるほか、機械配向による磁極ピース
も使用可能である。本発明に用いる複合樹脂マグネット
材料のフェライト粉は、一般式MOFe2O3で与えられるも
のでＭはバリウム，ストロンチウム，鉛の少なくとも一
種を含むもので80〜90wt％が望ましい。高分子材料はポ
リアミド，ポリプロピレン，ポリエチレン,PPS,PPO,塩
素化ポリエチレン等の熱可塑性樹脂で、10〜20wt％の配
合が望ましい。又必要に応じて各種添加剤を加えても何
ら問題はない。The lower mold 9 and the upper mold 11 are installed in an injection molding machine, and all the upper molds 11 have the same pole and all the lower molds 9 have opposite poles.
A magnetic field is generated by flowing an electric current with 16, 17 and a composite resin magnet material consisting of ferrite powder and polymer material is injected and injected to perform magnetic field molding, and seven magnetic pole pieces with a fan-shaped cross section 18 ~
A magnetic pole piece 26 in which 24 and the shaft 25 are integrated is obtained. The generated magnetic flux is in the direction shown by the broken line in the fan-shaped cavities A to H through the lower mold 9 of the magnetic metal material, the magnetic metal material 14 of the upper mold 11 and the yoke 4 ', and the fan-shaped side surface and inner circumference of the lower mold 9. The ferrite powder is effectively oriented in the x, y and z directions. Each of the molded magnetic pole pieces 18 to 24 is demagnetized after cooling, and the magnetic pole pieces 18 to 24 are bonded to each other with the magnetic pole piece 26 integrated with the shaft 25 as a reference, and eight poles are provided corresponding to the number of outer poles. It was magnetized. The obtained magnet roll is shown in FIG. In addition to magnetic field injection molding, the magnetic pole pieces 26 and 18 to 24 can be sufficiently extruded individually by providing a similar die and magnetic field generating means at the tip of the extruder.
Further, as the magnetic pole piece 26 and the magnetic pole pieces 18 to 24, a resin magnet material described later can be appropriately selected depending on the required magnetic force strength, and mechanically oriented magnetic pole pieces can also be used. The ferrite powder of the composite resin magnet material used in the present invention is given by the general formula MOFe 2 O 3 , and M preferably contains at least one of barium, strontium and lead, and is preferably 80 to 90 wt%. The polymer material is a thermoplastic resin such as polyamide, polypropylene, polyethylene, PPS, PPO, and chlorinated polyethylene, and it is desirable to add 10 to 20 wt% thereof. Further, there is no problem even if various additives are added as needed.
上記実施例によって得られるマグネットロールは、従来
品と比較して磁気力が15〜20％向上し、コストが60〜70
％安価になった。The magnet roll obtained by the above-mentioned embodiment has a magnetic force improved by 15 to 20% and a cost of 60 to 70 compared with the conventional product.
It became cheaper.
発明の効果 以上の説明で明らかなように本発明のマグネットロール
は、シャフトと磁極ピースが一体でかつ樹脂マグネット
材料で構成されているためシャフト加工の必要がないた
め安価でシャフト強度の高いマグネットロールを提供す
ることができるほか、極ズレ等がなく精度よく組み立て
ることができる。また、断面扇状磁極ピースの配向が扇
状円弧部から内周に配向されているため高磁力のマグネ
ットロールを任意の極数だけ得ることができる。EFFECTS OF THE INVENTION As is clear from the above description, the magnet roll of the present invention is inexpensive and has a high shaft strength because the shaft and the magnetic pole piece are integrally formed of a resin magnet material, and therefore there is no need for shaft processing. In addition to being able to provide, it can be assembled with high precision without any deviation. Further, since the orientation of the fan-shaped magnetic pole piece in cross section is oriented from the fan-shaped arc portion to the inner circumference, it is possible to obtain a magnet roll of high magnetic force by an arbitrary number of poles.
第１図は本発明のマグネットロールの一実施例の構成を
示す斜視図、第２図は本発明の金型構成を表わす断面
図、第３図，第４図は従来例のマグネットロールの構成
を示す組立途上と完成品の斜視図、第５図は他の従来例
の成形金型の構成図、第６図は従来例より得られるマグ
ネットロールの斜視図である。 18〜24……磁極ピース、25……シャフト、26……磁極ピ
ース。FIG. 1 is a perspective view showing a structure of an embodiment of a magnet roll of the present invention, FIG. 2 is a sectional view showing a mold structure of the present invention, and FIGS. 3 and 4 are structures of a magnet roll of a conventional example. FIG. 5 is a perspective view of an assembling process and a finished product, FIG. 5 is a configuration diagram of another conventional molding die, and FIG. 6 is a perspective view of a magnet roll obtained from the conventional example. 18-24 ... Magnetic pole piece, 25 ... Shaft, 26 ... Magnetic pole piece.
Claims (2)
磁極ピースとシャフトとをフェライトと高分子材料から
なる同一の複合樹脂マグネット材料で一体に成形し、そ
の周囲に必要数だけの磁極ピースを貼り合わせることを
特徴とするマグネットロール。1. At least one magnetic pole piece among a plurality of magnetic pole pieces and a shaft are integrally formed of the same composite resin magnet material made of ferrite and a polymer material, and a required number of magnetic pole pieces are provided around the same. A magnet roll characterized by being stuck together.
状両側面及び内周に配向されていることを特徴とする特
許請求の範囲第１項記載のマグネットロール。2. The magnet roll according to claim 1, wherein the magnetic pole piece is fan-shaped in cross section and is oriented from the fan-shaped arc portion to both fan-shaped both side surfaces and the inner circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61178050A JPH06105644B2 (en) | 1986-07-29 | 1986-07-29 | Magnetic control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61178050A JPH06105644B2 (en) | 1986-07-29 | 1986-07-29 | Magnetic control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6334904A JPS6334904A (en) | 1988-02-15 |
| JPH06105644B2 true JPH06105644B2 (en) | 1994-12-21 |
Family
ID=16041723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61178050A Expired - Lifetime JPH06105644B2 (en) | 1986-07-29 | 1986-07-29 | Magnetic control |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06105644B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3002854A2 (en) | 2014-09-30 | 2016-04-06 | Nichia Corporation | Bonded magnet and production method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3809215A1 (en) * | 1988-03-18 | 1989-10-05 | Bodenseewerk Perkin Elmer Co | ELECTROMAGNET FOR AN ATOMIC ABSORPTION SPECTROMETER |
| JP2685136B2 (en) * | 1989-02-22 | 1997-12-03 | 日立金属株式会社 | Magnet roll |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6151711B2 (en) * | 1980-04-17 | 1986-11-10 | Hitachi Ltd |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0231766Y2 (en) * | 1984-09-10 | 1990-08-28 | ||
| JPS6190213U (en) * | 1984-11-19 | 1986-06-12 |
-
1986
- 1986-07-29 JP JP61178050A patent/JPH06105644B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6151711B2 (en) * | 1980-04-17 | 1986-11-10 | Hitachi Ltd |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3002854A2 (en) | 2014-09-30 | 2016-04-06 | Nichia Corporation | Bonded magnet and production method thereof |
| US9583244B2 (en) | 2014-09-30 | 2017-02-28 | Nichia Corporation | Bonded magnet, bonded magnet component, and bonded magnet production method |
| US10832863B2 (en) | 2014-09-30 | 2020-11-10 | Nichia Corporation | Bonded magnet, bonded magnet component, and bonded magnet production method |
| US11735358B2 (en) | 2014-09-30 | 2023-08-22 | Nichia Corporation | Bonded magnet, bonded magnet component, and bonded magnet production method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6334904A (en) | 1988-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5181971A (en) | Magnet and method of manufacturing the same | |
| JP5530707B2 (en) | Cylindrical bonded magnet, manufacturing method thereof and manufacturing apparatus | |
| US4954800A (en) | Magnet and method of manufacturing the same | |
| JPH06105644B2 (en) | Magnetic control | |
| US4509031A (en) | Magnetic roller device | |
| JP2512025B2 (en) | Magnet roll manufacturing method | |
| JPS61115316A (en) | Magnet manufacturing die | |
| JPS6349889B2 (en) | ||
| JPS5961008A (en) | Magnet and manufacture thereof | |
| JP2563436B2 (en) | Magnet roll manufacturing method | |
| JPS6142249A (en) | Manufacture of rotor with permanent magnet | |
| JPS62130813A (en) | Manufacture of cylindrical multipolar anisotropic magnet and device therefor | |
| JPH038305A (en) | Magnet roll and manufacture thereof | |
| JP3017570B2 (en) | Plastic magnet roller and mold for manufacturing the same | |
| JPS6213015A (en) | Manufacture of magnet | |
| JP2756958B2 (en) | Manufacturing method of magnet roll | |
| JP2725328B2 (en) | Manufacturing method of magnet roll | |
| JP2512024B2 (en) | Magnet roll manufacturing method | |
| JP2677004B2 (en) | Magnetic field orientation molding apparatus for bonded magnets and magnetic field orientation molding method for bonded magnets using the apparatus | |
| JP2500270Y2 (en) | Multi-pole anisotropic cylindrical or solid cylindrical magnet molding die | |
| JPH071728B2 (en) | Magnetic control | |
| JPH071743B2 (en) | Magnetic field molding equipment for resin magnets | |
| JPH0618137B2 (en) | Mold for plastic magnet | |
| JPH0750654B2 (en) | Magnet rotor and manufacturing method thereof | |
| JPS62130812A (en) | Manufacture of cylindrical multipolar anisotropic magnet and device therefor |