JPH0821499B2 - Magnet roll manufacturing method - Google Patents
Magnet roll manufacturing methodInfo
- Publication number
- JPH0821499B2 JPH0821499B2 JP15134290A JP15134290A JPH0821499B2 JP H0821499 B2 JPH0821499 B2 JP H0821499B2 JP 15134290 A JP15134290 A JP 15134290A JP 15134290 A JP15134290 A JP 15134290A JP H0821499 B2 JPH0821499 B2 JP H0821499B2
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- shaft
- adhesive
- cylindrical
- cylindrical 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
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000000853 adhesive Substances 0.000 claims description 36
- 230000001070 adhesive effect Effects 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229920001651 Cyanoacrylate Polymers 0.000 claims description 2
- MWCLLHOVUTZFKS-UHFFFAOYSA-N Methyl cyanoacrylate Chemical compound COC(=O)C(=C)C#N MWCLLHOVUTZFKS-UHFFFAOYSA-N 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 12
- 238000007796 conventional method Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 7
- 230000004907 flux Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000004830 Super Glue Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- FGBJXOREULPLGL-UHFFFAOYSA-N ethyl cyanoacrylate Chemical compound CCOC(=O)C(=C)C#N FGBJXOREULPLGL-UHFFFAOYSA-N 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000006247 magnetic powder Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- LTHJXDSHSVNJKG-UHFFFAOYSA-N 2-[2-[2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethoxy]ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOCCOCCOC(=O)C(C)=C LTHJXDSHSVNJKG-UHFFFAOYSA-N 0.000 description 1
- 239000004709 Chlorinated polyethylene Substances 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910017709 Ni Co Inorganic materials 0.000 description 1
- 229910003267 Ni-Co Inorganic materials 0.000 description 1
- 229910003262 Ni‐Co Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はマグネットロールの製造方法に関し、更に詳
しくは、機械的強度に優れるとともに磁極の配置角度の
バラツキや長手方向の磁気特性のバラツキが小さく、且
つ生産性も高いマグネットロールの製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a magnet roll, and more specifically, it has excellent mechanical strength and small variations in the arrangement angle of magnetic poles and variations in magnetic characteristics in the longitudinal direction. And a method for manufacturing a magnet roll having high productivity.
従来、この種のマグネットロールの製造方法としては
例えば、第９図に示す如く２個以上のマグネット片
ａ′,a′…をシャフトｂに接着してマグネットロールに
する方法、第８図に示す如く円筒状に成形した円筒状
マグネットａ内にシャフトｂを密嵌挿入して一体化する
方法，シャフトも含め一体成形する方法等が実用化さ
れている。Conventionally, as a method of manufacturing a magnet roll of this type, for example, as shown in FIG. 9, a method of bonding two or more magnet pieces a ', a' ... to a shaft b to form a magnet roll is shown in FIG. As described above, a method in which the shaft b is closely fitted and inserted into the cylindrical magnet a formed in a cylindrical shape to integrate the shaft b, a method in which the shaft b is integrally formed, and the like have been put into practical use.
しかしながら、のマグネット片を接着する方法で
は、４極以上になると使用マグネット片磁気特性，形状
等の管理，接着条件の管理が複雑となり、磁力の大きさ
や磁極の配置角度等の品質面や生産性面で問題が多い。
又、の円筒状マグネットにシャフトを挿入する場合、
マグネット内径及びシャフト外径のバラツキに起因する
長手方向の磁気特性のバラツキやマグネットとシャフト
の接着強度のバラツキ等が発生し、品質が安定せず、
又、品質を安定させようとすると加工精度を上げるしか
なくコスト上の問題が発生する結果となっていた。又、
シャフトｂはマグネットａに密嵌する必要があることか
ら、密嵌時にシャフトが円筒状マグネット内壁を削って
削り屑が発生する問題があり、又、密嵌時にはみ出した
接着剤の処理等の厄介な問題もある。の射出成形によ
るシャフトを含めた一体成形では、成形金型が複雑で，
高価である上、冷却条件のバラツキによる長手方向の磁
力のバラツキが発生し、これを避けようとすれば生産性
が悪くなり、又、高価な磁石材料をシャフト材として使
用するので不経済である等の問題を内包している。However, in the method of adhering the magnet pieces, when the number of poles is 4 or more, the management of the magnetic characteristics, shape, etc. of the magnet pieces used and the control of the adhering conditions become complicated, and the quality and productivity such as the magnitude of the magnetic force and the arrangement angle of the magnetic poles are improved. There are many problems in terms of
Also, when inserting the shaft into the cylindrical magnet of
Variations in the magnetic properties in the longitudinal direction due to variations in the magnet inner diameter and shaft outer diameter, variations in the adhesive strength between the magnet and shaft, etc. occur, and the quality is unstable,
Further, if the quality is to be stabilized, the processing accuracy must be increased, which results in a cost problem. or,
Since the shaft b needs to be tightly fitted to the magnet a, there is a problem that the shaft scrapes the inner wall of the cylindrical magnet at the time of tight fitting to generate shavings, and the troubles such as the treatment of the adhesive protruding at the time of tight fitting. There is also a problem. In the integral molding including the shaft by injection molding of, the molding die is complicated,
In addition to being expensive, variations in the magnetic force in the longitudinal direction occur due to variations in cooling conditions, and if it is attempted to avoid this, the productivity will deteriorate, and it is uneconomical because expensive magnet materials are used as shaft materials. It contains problems such as.
本発明者らはかかる実情に鑑み、上記問題点を解消す
べく鋭意研究した結果、本発明に到達した。即ち、本発
明は、ボンデッドマグネット製の円筒状マグネットとシ
ャフトから構成されるマグネットロールを製造するに際
し、該円筒状マグネットの内径に、その深さが0.2〜0.6
mmに設定された複数条の溝を該円筒状マグネットの長手
方向に設けるとともに、該マグネットの一端より圧縮ガ
スを導入し、その圧力により該マグネットの内径を拡開
膨張させながら、他端よりシャフトを挿入し、さらに、
他端より真空吸引しつつ、マグネットの前記溝の粘度が
２〜300CPSの接着剤を流入し、接着剤を溝全長にわたっ
て均一分散させることによって円筒状マグネットとシャ
フトを接着固定することを特徴とするマグネットロール
の製造方法を内容とするものである。圧縮ガスとしては
金属やボンデッドマグネットと反応しないものであれば
任意のものが採用される空気を用いることが作業性並び
に経済性の観点から好ましい。The present inventors have arrived at the present invention as a result of earnest research in order to solve the above-mentioned problems in view of the above circumstances. That is, the present invention, when manufacturing a magnet roll composed of a cylindrical magnet made of a bonded magnet and a shaft, the inner diameter of the cylindrical magnet, the depth is 0.2 ~ 0.6.
A plurality of grooves set to mm are provided in the longitudinal direction of the cylindrical magnet, a compressed gas is introduced from one end of the magnet, and the inner diameter of the magnet is expanded and expanded by the pressure, and the shaft is extended from the other end. And then
The vacuum magnet is sucked from the other end, and an adhesive having a viscosity of 2 to 300 CPS in the groove of the magnet is introduced to uniformly disperse the adhesive over the entire length of the groove to bond and fix the cylindrical magnet and the shaft. The content is a method of manufacturing a magnet roll. From the viewpoint of workability and economy, it is preferable to use air that is selected as the compressed gas as long as it does not react with the metal or the bonded magnet.
円筒状マグネットは所定の長さに切断された後、一
端、即ち、シャフトを挿入する側の反対側より圧縮ガス
を導入して円筒状マグネットの内径を押し拡げながらシ
ャフトを挿入する。After the cylindrical magnet is cut into a predetermined length, the compressed gas is introduced from one end, that is, the side opposite to the side into which the shaft is inserted, and the shaft is inserted while expanding the inner diameter of the cylindrical magnet.
上記の如くしてシャフトが挿入された後、圧縮ガスの
導入を停止すると、圧縮ガスにより膨張していた円筒状
マグネットは収縮し、シャフトに固定される。When the introduction of the compressed gas is stopped after the shaft is inserted as described above, the cylindrical magnet expanded by the compressed gas contracts and is fixed to the shaft.
次ぎに、円筒状マグネットとシャフト間の一端を真空
吸引しつつ他端より接着剤を流入せしめ接着剤を溝内に
案内流入させて円筒状マグネットとシャフトを強固に固
定させる。Next, one end between the cylindrical magnet and the shaft is vacuum-sucked, and the adhesive is introduced from the other end so that the adhesive is guided into the groove to firmly fix the cylindrical magnet and the shaft.
シャフトが接着固定された円筒状マグネットに対して
は、所定の着磁が施され、マグネットロールとされる。
本発明により得られるマグネットロールは複写機，プリ
ンター，ファクシミリ等の電子写真に使用する現像、ク
リーニング用マグネットロールとして好適に使用され
る。The cylindrical magnet having the shaft adhered and fixed is magnetized in a predetermined manner to form a magnet roll.
The magnet roll obtained by the present invention is suitably used as a developing and cleaning magnet roll used for electrophotography in copying machines, printers, facsimiles and the like.
次に本発明の詳細を図示した実施例に基づき説明す
る。Next, details of the present invention will be described based on illustrated embodiments.
第１図は本発明の製造方法によって作成したマグネッ
トロールの１実施例である。マグネットロールＡは、ボ
ンディドマグネット製の円筒状マグネット１に金属製又
はプラスチック製のシャフト２を挿通して構成される。
円筒状マグネット１の内径面には該円筒状マグネット１
の長手方向に沿って溝３が複数条刻設されている。FIG. 1 shows one embodiment of a magnet roll produced by the manufacturing method of the present invention. The magnet roll A is configured by inserting a metal or plastic shaft 2 into a cylindrical magnet 1 made of a bonded magnet.
On the inner diameter surface of the cylindrical magnet 1, the cylindrical magnet 1
A plurality of grooves 3 are engraved along the longitudinal direction of.
ボンデッドマグネットの材料については、まず結合材
としては公知の合成樹脂やゴムが使用でき、例えばポリ
塩化ビニール，ポリエチレン，ポリプロピレン、塩素化
ポリエチレン，エチレン・酢酸ビニール共重合体等の熱
可塑性樹脂,NBR,SBR等のゴムが単独又は２種以上混合し
て用いられ、又、磁性粉としては例えばマグネトプラン
バイト型のSr又はBaフェライト等のフェライト系、Sm−
Co系合金,Nd−Fe−Ｂ等の希土類系,Al−Ni−Co系等が用
いられる。磁性粉の含率は30〜70体積％が好ましい。磁
性粉と結合材との親和性や流動性を高めるためのシラン
処理剤やチタネート処理剤，可塑剤、その他一般に用い
られる添加剤を添加することも可能である。Regarding the material of the bonded magnet, first of all, a known synthetic resin or rubber can be used as the binding material. For example, a thermoplastic resin such as polyvinyl chloride, polyethylene, polypropylene, chlorinated polyethylene, ethylene / vinyl acetate copolymer, NBR, etc. , Rubber such as SBR is used alone or in combination of two or more, and as the magnetic powder, for example, magnetoplumbite type ferrite such as Sr or Ba ferrite, Sm-
Co-based alloys, rare earth-based alloys such as Nd-Fe-B, Al-Ni-Co alloys, etc. are used. The magnetic powder content is preferably 30 to 70% by volume. It is also possible to add a silane-treating agent, a titanate-treating agent, a plasticizer, and other commonly used additives for increasing the affinity or fluidity between the magnetic powder and the binder.
ボンデッドマグネットは1.5メガガウスエルステッド
（以下メガガウスエルステッドをMGOeと記す。）以上の
最大エネルギー積を有するものが好ましい。これは1.5M
GOe未満では、通常要求されるマグネットロールの表面
磁束密度900ガウス（以下ガウスをＧと記す。）を得る
ことが困難である為である。The bonded magnet preferably has a maximum energy product of 1.5 Mega Gauss Oersted (hereinafter, Mega Gauss Oersted is referred to as MGOe) or more. This is 1.5M
This is because if it is less than GOe, it is difficult to obtain the normally required surface magnetic flux density of 900 gauss (hereinafter Gauss is referred to as G) of the magnet roll.
本発明に用いられるシャフトは、鉄，アルミニウム等
の金属，ボフェニレンオキサイド，ポリアミド等のいわ
ゆるエンジニアリングプラスチックから作られたものが
用いられる。The shaft used in the present invention is made of a metal such as iron or aluminum, or a so-called engineering plastic such as bophenylene oxide or polyamide.
本発明に用いられる円筒状のボンデッドマグネット
は、上記組成物を磁場配向押出成形することにより容易
に得ることができる。The cylindrical bonded magnet used in the present invention can be easily obtained by subjecting the above composition to magnetic field orientation extrusion molding.
円筒状マグネットの内径面に刻設される溝３の深さｄ
は、0.2〜0.6mm程度が好ましく、更に好ましくは0.3〜
0.5mm程度である。0.2mmより小さいと、接着剤の流入が
不十分で、接着剤が均一に分布しない。一方0.6mmより
大きくなると吸引力により接着剤が吸引側に吸い寄せら
れシャフトの汚染，接着強度の低下を生ずる。溝の数
は、円筒状マグネットの内径にもよるが、シャフト径が
５〜8mmでは２個以上、４〜８個が好適である。溝数が
１個では接着力が弱くシャフトの固定が不十分である。
又、10個以上になると内径面に溝部が多くなりすぎ、円
筒状マグネットとシャフトの同軸度がでにくくなった
り、シャフトへの接着面積が減少し接着強度が低下する
という現象が生ずる。The depth d of the groove 3 formed on the inner diameter surface of the cylindrical magnet
Is preferably about 0.2 to 0.6 mm, more preferably 0.3 to
It is about 0.5 mm. If it is less than 0.2 mm, the inflow of the adhesive is insufficient and the adhesive is not evenly distributed. On the other hand, if it exceeds 0.6 mm, the adhesive will be attracted to the suction side by the suction force, resulting in contamination of the shaft and deterioration of the adhesive strength. The number of grooves depends on the inner diameter of the cylindrical magnet, but is preferably 2 or more and 4 to 8 when the shaft diameter is 5 to 8 mm. If the number of grooves is one, the adhesive strength is weak and the shaft cannot be fixed sufficiently.
Further, when the number is 10 or more, the number of grooves on the inner diameter surface becomes too large, the coaxiality between the cylindrical magnet and the shaft becomes difficult, and the adhesion area to the shaft decreases, resulting in a decrease in adhesion strength.
接着剤は、シアノアクリレート系，エポキシ系，の
他、テトラエチレングリコール・ジメタクリレートなど
の嫌気性接着剤が使用できるが、取扱い作業性面から、
粘度が２〜300CPSのシアノアクリレート系接着剤が好適
である。As the adhesive, cyanoacrylate-based, epoxy-based, and anaerobic adhesives such as tetraethylene glycol dimethacrylate can be used, but from the viewpoint of handling workability,
A cyanoacrylate adhesive having a viscosity of 2 to 300 CPS is suitable.
粘度が300CPS以上になると、吸引による流入に時間が
かかったり、流入が困難になり、全長にわたって接着剤
が均一分布しにくくなる。又、粘度が低すぎると接着を
コントロールすることが困難となり、又、接着剤の横溢
によるシャフトの汚染にも注意が必要となる。When the viscosity is 300 CPS or more, it takes time to inflow by suction, or the inflow becomes difficult, and it becomes difficult to uniformly distribute the adhesive over the entire length. Further, if the viscosity is too low, it becomes difficult to control the adhesion, and it is necessary to pay attention to the contamination of the shaft due to the lateral overflow of the adhesive.
第４図（イ），（ロ）は円筒状マグネット１へのシャ
フト２の取付け方法を示す説明図である。内径面に複数
条の溝３が刻設された連続した長尺状の円筒状マグネッ
トを所定長さに切断して所定形状の円筒状マグネット１
を作成した後、この円筒状マグネット１の一端、即ち、
シャフト２を挿入する側の反対側より圧縮ガス４を導入
し円筒状マグネット１の内径を押し拡げながらシャフト
２を挿入する。圧縮ガスとしては空気、窒素等の不活性
ガスが用いられるが、とくに空気が好ましく、その圧力
は３〜5kg/cm2程度が好適である。圧力が2kg/cm2より小
さいと、マグネットの性質にもよるが、圧縮ガスによる
円筒状マグネット１の拡開膨張が不十分でシャフト２の
挿入が困難となる。一方5kg/cm2より大きくなると円筒
状マグネットの膨張コントロールが難しくなる。FIGS. 4A and 4B are explanatory views showing a method of attaching the shaft 2 to the cylindrical magnet 1. A continuous long cylindrical magnet having a plurality of grooves 3 engraved on the inner diameter surface is cut into a predetermined length to form a cylindrical magnet 1 having a predetermined shape.
After creating, one end of this cylindrical magnet 1, that is,
The compressed gas 4 is introduced from the side opposite to the side on which the shaft 2 is inserted, and the shaft 2 is inserted while expanding the inner diameter of the cylindrical magnet 1. As the compressed gas, an inert gas such as air or nitrogen is used, but air is particularly preferable, and its pressure is preferably about 3 to 5 kg / cm 2 . If the pressure is less than 2 kg / cm 2 , the expansion and expansion of the cylindrical magnet 1 due to the compressed gas is insufficient, but it becomes difficult to insert the shaft 2 depending on the property of the magnet. On the other hand, if it exceeds 5 kg / cm 2 , it becomes difficult to control the expansion of the cylindrical magnet.
上記の如くしてシャフト２が挿入された後、圧縮ガス
４の導入を停止すると、圧縮ガス４により膨張していた
円筒状マグネット１は収縮し、シャフト２に固定され
る。When the introduction of the compressed gas 4 is stopped after the shaft 2 is inserted as described above, the cylindrical magnet 1 expanded by the compressed gas 4 contracts and is fixed to the shaft 2.
次ぎに、第４図（ロ）に示す如く円筒状マグネット１
とシャフト２間の一端を真空吸引しつつ他端より接着剤
５を流入せしめ真空吸引力によって接着剤５を溝３内に
案内流入させて円筒状マグネット１とシャフト２を強固
に接着固定させる。接着剤５は真空吸引されていること
から溝３内に迅速に導入され、接着剤５は溝全長にわた
って均一分布される。Next, as shown in FIG. 4B, the cylindrical magnet 1
While the one end between the shaft 2 and the shaft 2 is vacuum-sucked, the adhesive 5 is caused to flow from the other end, and the adhesive 5 is guided and flowed into the groove 3 by the vacuum suction force to firmly bond and fix the cylindrical magnet 1 and the shaft 2. Since the adhesive 5 is vacuum sucked, it is quickly introduced into the groove 3, and the adhesive 5 is uniformly distributed over the entire length of the groove.
シャフトが接着固定された円筒状マグネットに対して
は、所定の着磁が施され、マグネットロールとされる。The cylindrical magnet having the shaft adhered and fixed is magnetized in a predetermined manner to form a magnet roll.
以下、本発明の成果を検証する為に行った試験につい
て、比較例を挙げて更に詳細に説明するが、本発明はこ
れらにより何ら制限を受けるものではない。Hereinafter, the test conducted for verifying the results of the present invention will be described in more detail with reference to Comparative Examples, but the present invention is not limited thereto.
試験１ ストロンチウムフェライト65体積％と軟質塩化ビニー
ル系樹脂35体積％からなるマグネット樹脂組成物のペレ
ットを押出機（池貝鉄工製65ミリ、L/D＝22）により磁
場配向押出成形して外径13.6φ、内径5.4φの外形を有
する円筒状マグネットを作成し、この円筒状マグネット
をベースにして溝数及び溝深さを変化させた４極円筒状
マグネットを各種作成した。次に、このようにして作成
した各円筒状マグネットにシャフトを挿入する反対側よ
り4kg/cm2の圧縮空気を導入しながらシャフトを挿入し
た上で、圧縮空気導入側より350mmHg以下の真空吸引力
を達成できる吸引装置で円筒状マグネットとシャフト間
の溝を吸引しつつ、シャフト挿入側の溝に粘度40CPSの
シアノアクリレート系接着剤（東亜合成化学製アロンア
ルファー＃241）を流入させシャフトを接着固定した。
そしてこのようにして作成した各マグネットロールに対
し、その円筒状マグネットの外面を保持具で固定した上
でシャフトに軸方向の引張り力を作用させ、シャフト固
定力を測定した。試験はそれぞれのマグネットロールを
10個ずつ作成しその平均値を算出した。結果を第１表に
示す。Test 1 Pellets of a magnet resin composition consisting of 65% by volume of strontium ferrite and 35% by volume of a soft vinyl chloride resin were magnetically oriented and extruded by an extruder (Ikegai Tekko Co., Ltd. 65 mm, L / D = 22) to obtain an outer diameter of 13.6. Cylindrical magnets having an outer diameter of φ and an inner diameter of 5.4φ were prepared, and various 4-pole cylindrical magnets having different groove numbers and groove depths were prepared based on the cylindrical magnets. Next, insert the shaft into each cylindrical magnet created in this way while introducing 4 kg / cm 2 of compressed air from the opposite side, and then from the compressed air introduction side, a vacuum suction force of 350 mmHg or less. While attracting the groove between the cylindrical magnet and the shaft with a suction device that can achieve the above, a cyanoacrylate adhesive (Aaron Alpha # 241 manufactured by Toagosei Kagaku Co., Ltd.) with a viscosity of 40 CPS is made to flow into the groove on the shaft insertion side to fix the shaft. did.
Then, with respect to each of the magnet rolls thus created, the outer surface of the cylindrical magnet was fixed by a holder, and a tensile force in the axial direction was applied to the shaft to measure the shaft fixing force. Test each magnet roll
Ten pieces were prepared and the average value was calculated. The results are shown in Table 1.
同様に、溝数４個で溝深さ0.2mm,0.4mm,0.6mm,0.8mm
の円筒状マグネットにシャフトを挿入した後、粘度がそ
れぞれ2,40,100,200,300,500,800CPSのシアノアクリレ
ート系接着剤（東亜合成化学製アロンアルファー）を流
入固定し、粘度を変えた場合のシャフトの固定力を測定
した。結果を第２表に示す。又、他の条件を同一にして
吸引装置を使用しない状態で比較的粘度の低い接着剤を
流入固化させて比較用のマグネットロールを作成し、こ
のマグネットロールのシャフト固定力を測定した。測定
は各マグネットロールを10個ずつ作成し、その平均値を
算出した。結果を第３表に示す。Similarly, if the number of grooves is 4, the groove depth is 0.2mm, 0.4mm, 0.6mm, 0.8mm.
After inserting the shaft into the cylindrical magnet, the viscosity of 2,40,100,200,300,500,800CPS cyanoacrylate adhesive (Aaron Alpha manufactured by Toagosei Kagaku Co., Ltd.) was introduced and fixed, and the fixing force of the shaft when the viscosity was changed was measured. . The results are shown in Table 2. Further, under the same conditions other than the above, an adhesive having a relatively low viscosity was flowed in and solidified without using a suction device to prepare a comparative magnet roll, and the shaft fixing force of this magnet roll was measured. For the measurement, ten magnet rolls were prepared and the average value was calculated. The results are shown in Table 3.
第1,2,3表から明らかなごとく、溝深さが0.2〜0.6mm,
溝個数が４〜８個，接着剤の粘度が２〜300CPSの場合
に、接着剤の流入もスムーズであり、且つ充分な接着固
定力が得られることがわかった。そして第３表に示す如
く、真空吸引しないものでは接着剤の流入は一応可能で
あるものの接着剤が溝全長に完全に流入するまでに多く
の時間を要することから、生産性に問題があり、量産に
は適さないこともわかった。As is clear from Tables 1, 2 and 3, the groove depth is 0.2 to 0.6 mm,
It was found that when the number of grooves is 4 to 8 and the viscosity of the adhesive is 2 to 300 CPS, the flow of the adhesive is smooth and a sufficient adhesive fixing force can be obtained. Then, as shown in Table 3, in the case where the vacuum suction is not performed, the inflow of the adhesive is possible, but since it takes a lot of time for the adhesive to completely flow into the entire groove length, there is a problem in productivity. I also found that it was not suitable for mass production.
試験２ 試験１に於いて作成した溝数４個、溝深さ0.4mm、接
着剤粘度40CPSのものに後着磁を行い、第５図に示すご
とき磁極配置となした４極のマグネットローラーを作成
して、表面磁束密度及び長手方向の磁束密度のバラツキ
並びに磁極の配置角度のバラツキを測定した。又、比較
の為に従来の製造方法により作成した２種類のマグネッ
トロールの表面磁束密度、長手方向の磁束密度のバラツ
キ、磁極の配置角度のバラツキも同時に測定した。従来
法１としては第６図に示す如く、４個のマグネット片を
接着剤を用いてシャフトに接着したものを採用し、又、
従来法２としては溝を有しない円筒状マグネットにシャ
フトを密嵌させたものを採用した。測定は各マグネット
ロールを10個ずつ作成し、その平均値を算出した。結果
第４表に示す。 Test 2 4 magnets with 4 poles, groove depth 0.4mm and adhesive viscosity of 40CPS created in Test 1 were post-magnetized and magnetic poles were arranged as shown in Fig. 5. After being prepared, variations in surface magnetic flux density, longitudinal magnetic flux density, and variations in magnetic pole arrangement angle were measured. For comparison, the surface magnetic flux densities of the two types of magnet rolls produced by the conventional manufacturing method, variations in the magnetic flux density in the longitudinal direction, and variations in the magnetic pole arrangement angle were also measured at the same time. As the conventional method 1, as shown in FIG. 6, four magnet pieces bonded to the shaft with an adhesive are used.
As the conventional method 2, a cylindrical magnet having no groove and a shaft tightly fitted is adopted. For the measurement, ten magnet rolls were prepared and the average value was calculated. The results are shown in Table 4.
第４表から明らかな如く、従来法１及び従来法２に比
べて本発明により得られたマグネットロールは長手方向
の磁力のバラツキが小さく、且つ、磁極の配置角度のバ
ラツキも小さいことがわかる。従来法１によって作成さ
れたマグネットロールに磁気特性のバラツキが多いの
は、分離したマグネット片を複数個用いていることか
ら、これら各マグネット片の磁気特性を一致させること
が困難であるとともに接合部における磁界分布を所定の
分布にすることが困難であるからであり、又、従来法２
によって作成したマグネットロールに磁気特性のバラツ
キが多いのは、円筒状マグネットにシャフトが密嵌され
ている為に、シャフト外面並びに円筒状マグネット内径
面の加工精度のバラツキがそのまま磁気特性のバラツキ
として反映し、しかも密嵌時にシャフトが円筒状マグネ
ットの内径面を削るからであると推測される。これらに
対し、本願発明の製造方法では円筒状マグネットは一体
である為、磁界分布の制御は容易であり、しかも円筒状
マグネットとシャフトとの固定は溝を通じて供給される
充分な量の接着剤によってなされる為、従来法２のよう
に円筒状マグネットにシャフトを密嵌状態で無理に押し
込んで固定する必要もなく、この結果、シャフト外面や
円筒状マグネット内径面の加工精度が多少劣っていても
このバラツキが磁気特性のバラツキとして直接反映する
こともなく、更にシャフトが円筒状マグネット内径面を
切削することもないから磁気特性に悪影響がでることは
ないのである。 As is clear from Table 4, the magnet roll obtained by the present invention has less variation in the magnetic force in the longitudinal direction and the variation in the arrangement angle of the magnetic poles is smaller than that in the conventional method 1 and the conventional method 2. The magnetic roll produced by the conventional method 1 has a large variation in magnetic characteristics because it is difficult to match the magnetic characteristics of the magnet pieces because a plurality of separated magnet pieces are used and the joint portion This is because it is difficult to make the magnetic field distribution at a predetermined distribution in the conventional method 2
The magnetic characteristics of the magnet roll created by the method have a large variation in the magnetic characteristics.Since the shaft is tightly fitted to the cylindrical magnet, the variations in the machining accuracy of the outer surface of the shaft and the inner surface of the cylindrical magnet are reflected as the variation of the magnetic characteristics. It is presumed that this is because the shaft scrapes the inner diameter surface of the cylindrical magnet at the time of tight fitting. On the other hand, in the manufacturing method of the present invention, since the cylindrical magnet is integrated, it is easy to control the magnetic field distribution, and the fixing of the cylindrical magnet and the shaft is performed by a sufficient amount of adhesive supplied through the groove. Therefore, unlike the conventional method 2, it is not necessary to forcibly push the shaft tightly into the cylindrical magnet to fix it, and as a result, even if the machining accuracy of the outer surface of the shaft or the inner surface of the cylindrical magnet is somewhat inferior. This variation does not directly reflect the variation in the magnetic characteristics, and the shaft does not cut the inner surface of the cylindrical magnet, so that the magnetic characteristics are not adversely affected.
叙上の通り、本発明によれば機械的強度に優れるとと
もに磁力の長手方向のバラツキや磁極の配置角度のバラ
ツキが共に小さい高品質のマグネットロールを提供する
ことができる。又、本発明は圧縮ガスにより円筒状マグ
ネットを押し拡げながらシャフトを挿入し、後から接着
固定するので、従来法のごとき削り屑や接着剤の食み出
しによる端部処理等の問題もなく、生産性を大巾に向上
させる。しかも、シャフトと円筒状マグネットは溝を通
じて供給される充分な量の接着剤によって確実に固定さ
れるものであるから、シャフト外形面並びに円筒状マグ
ネット内径面の加工精度は高度なものである必要はな
く、生産性を一層高めることができる。As described above, according to the present invention, it is possible to provide a high-quality magnet roll which is excellent in mechanical strength and has small variations in magnetic force in the longitudinal direction and variations in arrangement angle of magnetic poles. Further, in the present invention, since the shaft is inserted while the cylindrical magnet is being expanded by the compressed gas and the adhesive is fixed afterward, there is no problem such as shavings as in the conventional method or end treatment due to leaching of the adhesive. Greatly improve productivity. Moreover, since the shaft and the cylindrical magnet are securely fixed by a sufficient amount of adhesive supplied through the groove, it is necessary that the machining accuracy of the outer surface of the shaft and the inner surface of the cylindrical magnet is high. Therefore, the productivity can be further improved.
第１図は本発明の製造方法により作成されたマグネット
ロールの１実施例の説明図、第２図は同実施例に用いら
れる円筒状マグネットの正面図、第３図は同円筒状マグ
ネットの部分拡大説明図、第４図（イ），（ロ）は円筒
状マグネットへのシャフトの挿入方法を示す説明図、第
５図は試験２において使用した本発明のマグネットロー
ルの正面図、第６図及び第７図は試験２において使用し
た従来法により製造したマグネットロールの正面図、第
８図及び第９図は従来のマグネットロールの説明図であ
る。 A:マグネットロール、 1:円筒状マグネット、 2:シャフト、3:溝、 4:圧縮ガス、5:接着剤、 a:円筒状マグネット、 ａ′：マグネット片、 b:シャフト。FIG. 1 is an explanatory view of one embodiment of a magnet roll produced by the manufacturing method of the present invention, FIG. 2 is a front view of a cylindrical magnet used in the same embodiment, and FIG. 3 is a portion of the same cylindrical magnet. Enlarged explanatory views, FIGS. 4 (a) and 4 (b) are explanatory views showing a method of inserting the shaft into the cylindrical magnet, FIG. 5 is a front view of the magnet roll of the present invention used in Test 2, and FIG. 7 and 8 are front views of the magnet roll manufactured by the conventional method used in Test 2, and FIGS. 8 and 9 are explanatory views of the conventional magnet roll. A: Magnet roll, 1: Cylindrical magnet, 2: Shaft, 3: Groove, 4: Compressed gas, 5: Adhesive, a: Cylindrical magnet, a ': Magnet piece, b: Shaft.
Claims (5)
トとシャフトから構成されるマグネットロールを製造す
るに際し、円筒状マグネットの内径面における長手方向
にその深さが0.2〜0.6mmに設定された溝を複数条刻設す
るとともに、該円筒状マグネットの一端より圧縮ガスを
導入し、その圧力により該マグネットの内径を拡開膨張
させながら他端よりシャフトを挿入した後、一端より溝
に沿って、流入時の粘度が２〜300CPSの接着剤を流入さ
せつつ、他端よりこれを吸引し、接着剤を溝全長にわた
って均一に分散させることでマグネットとシャフトを接
着させることを特徴とするマグネットロールの製造方
法。1. When manufacturing a magnet roll composed of a cylindrical magnet made of a bonded magnet and a shaft, a groove whose depth is set to 0.2 to 0.6 mm in the longitudinal direction on the inner diameter surface of the cylindrical magnet is formed. A plurality of lines are engraved, compressed gas is introduced from one end of the cylindrical magnet, the inner diameter of the magnet is expanded and expanded by the pressure, and the shaft is inserted from the other end. Manufacture of a magnet roll characterized by adhering an adhesive with a viscosity of 2 to 300 CPS at the same time, suctioning it from the other end, and evenly dispersing the adhesive over the entire length of the groove to adhere the magnet to the shaft. Method.
請求項１記載のマグネットロールの製造方法。2. The method of manufacturing a magnet roll according to claim 1, wherein the shaft is made of metal or plastic.
２記載のマグネットロールの製造方法。3. The method of manufacturing a magnet roll according to claim 1, wherein the compressed gas is air.
ウスエルステッド以上の最大エネルギー積を有する請求
項１〜請求項３のいずれかに記載のマグネットロールの
製造方法。4. The method of manufacturing a magnet roll according to claim 1, wherein the cylindrical bonded magnet has a maximum energy product of 1.5 mega gauss Oersted or more.
求項１〜請求項４記載のいずれかに記載のマグネットロ
ールの製造方法。5. The method of manufacturing a magnet roll according to claim 1, wherein the adhesive is a cyanoacrylate-based adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15134290A JPH0821499B2 (en) | 1990-06-08 | 1990-06-08 | Magnet roll manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15134290A JPH0821499B2 (en) | 1990-06-08 | 1990-06-08 | Magnet roll manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0443613A JPH0443613A (en) | 1992-02-13 |
| JPH0821499B2 true JPH0821499B2 (en) | 1996-03-04 |
Family
ID=15516475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15134290A Expired - Lifetime JPH0821499B2 (en) | 1990-06-08 | 1990-06-08 | Magnet roll manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0821499B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114823025B (en) * | 2022-05-10 | 2024-02-02 | 江西金力永磁科技股份有限公司 | Low-eddy-current-loss neodymium-iron-boron magnet |
-
1990
- 1990-06-08 JP JP15134290A patent/JPH0821499B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0443613A (en) | 1992-02-13 |
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