JPS60202542A - Smoother for coating device of magnetic coating material - Google Patents
Smoother for coating device of magnetic coating materialInfo
- Publication number
- JPS60202542A JPS60202542A JP5724284A JP5724284A JPS60202542A JP S60202542 A JPS60202542 A JP S60202542A JP 5724284 A JP5724284 A JP 5724284A JP 5724284 A JP5724284 A JP 5724284A JP S60202542 A JPS60202542 A JP S60202542A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- base film
- smoother
- magnetic paint
- coating material
- 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
Abstract
Description
【発明の詳細な説明】
発明の技術分野
本発明はＶＴＲ（ビデオテープレコーダ）用磁気テープ
の磁性塗料塗布装置におけるスムーザ−に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a smoother in a magnetic paint coating apparatus for a magnetic tape for a VTR (video tape recorder).
従来技術と問題点
従来、ＶＴＲ用磁気テープの製造工程におりて、磁性塗
料の塗布には第１図に示す如き塗布装置が用いられてい
る。この装置を簡単に説明すると、１は磁気テープ用ベ
ースフィルム、２はフィードローラ、３はグラビアロー
ルＣ版胴）、４はドクターブレード、５は塗料容器、６
は圧胴、７社スムーザ−１８は配向用磁石、９は乾燥炉
である。Prior Art and Problems Conventionally, a coating device as shown in FIG. 1 has been used to coat magnetic paint in the manufacturing process of magnetic tapes for VTRs. To briefly explain this device, 1 is a base film for magnetic tape, 2 is a feed roller, 3 is a gravure roll C plate cylinder), 4 is a doctor blade, 5 is a paint container, 6
1 is an impression cylinder, 7 smoother 18 is an orientation magnet, and 9 is a drying oven.
この塗布装置による磁気テープの塗装は、第２図に示す
ようにポリエステル等を用いたベースフィルムＩＣ厚さ
約１６μｍ１幅約１ｍ）の上にストライプ状に磁性塗料
ｌＯを印刷し、次いでスムーザ−７によって塗料面を一
様に均し、さらに配向用磁石８によって磁性塗料中の磁
粉の配向を行なった後、乾燥炉９によって磁性塗料の硬
化を行なうようになっている。As shown in Fig. 2, magnetic tape is coated with this coating device by printing magnetic paint lO in stripes on a base film IC (thickness: approximately 16 μm, width: approximately 1 m) made of polyester, etc.; After the surface of the paint is evenly leveled and the magnetic particles in the magnetic paint are oriented by an orientation magnet 8, the magnetic paint is cured in a drying oven 9.
このようが磁性塗料塗布装置において、スムーザ−は第
３図のａ図に示す如き支持台１１に取付けられた薄いポ
リエステルフィルム１２によりて塗装面１０ｍを舐める
もの、あるいは第３図のｂ図に示す如くステンレス鋼の
バー１３を塗装面１０ｍに接触させるものなどが実用さ
れていた。In such a magnetic paint coating device, the smoother is one that licks the painted surface 10 m with a thin polyester film 12 attached to a support base 11 as shown in Fig. 3a, or a smoother as shown in Fig. 3b. A system in which a stainless steel bar 13 is brought into contact with a painted surface of 10 m has been put into practical use.
ところがこれらのスム、−ザーは塗装面を機械的に均ら
すものであるため塗装面の凹凸の精度が不充分であり、
特に記鈴密度が高度化され磁性塗膜の厚さを薄くする必
要のある８ｍｍＶＴＲ用の磁気テープには不適であると
いう欠点があった。However, since these methods mechanically level the painted surface, the accuracy of the unevenness of the painted surface is insufficient.
In particular, it has the disadvantage that it is unsuitable for magnetic tapes for 8 mm VTRs, which have higher recording densities and require thinner magnetic coatings.
発明の目的
本発明は上記従来の欠点に鑑み、磁性塗料塗布装置にお
いて、磁性塗料塗布面に非接触でスムージングを行なう
ことにより高精度の平面が得られるようにしたスムーザ
−を提供することを目的とするものである。Purpose of the Invention In view of the above-mentioned drawbacks of the conventional art, an object of the present invention is to provide a smoother in a magnetic paint applicator that can obtain a highly accurate flat surface by smoothing the surface coated with magnetic paint without contact. That is.
発明の構成
そしてこの目的は本発明によれば、ベースフィルム上に
コーティング法によりストライプ状に塗布された磁性塗
料を未硬化のうちにその厚さを一様にするためのスムー
ザ−であって、ガイドローラによって走行するベースフ
ィルムの裏面に近接し、Ｎ−８の磁極を交互にベースフ
ィルムに対向させた複数個の磁石を配置し、ベースフィ
ルムの磁性塗料塗布面に非接触でスムージングを行なう
ことを特徴とするスムーザ−を提供することによって達
成される。According to the present invention, the present invention provides a smoother for uniformizing the thickness of magnetic paint applied in stripes on a base film by a coating method before it is cured. A plurality of magnets with N-8 magnetic poles facing the base film alternately are arranged close to the back surface of the base film that is run by a guide roller, and smoothing is performed without contacting the magnetic paint coated surface of the base film. This is achieved by providing a smoother characterized by:
発明の実施例 以下、本発明実施例を図面によって詳述する。Examples of the invention Embodiments of the present invention will be described in detail below with reference to the drawings.
第４図は本発明による磁性塗料塗布装置のスムーザ−を
説明するための図であＬｍ図は要部の斜視図、ｂ図は１
図の２矢方向より見九拡大側面図である。同図において
、２０．２１．２２゜２３は磁石、２４線ベースフイル
ム、２５は磁性塗料、２６．２７Ｒガイドローラ、矢印
２８はベースフィルムの進行方向をそれぞれ示している
。Fig. 4 is a diagram for explaining the smoother of the magnetic paint coating device according to the present invention. Fig. Lm is a perspective view of the main part, and Fig. 1
FIG. 9 is an enlarged side view seen from the direction of the arrow 2 in the figure. In the figure, reference numerals 20, 21, 22, 23 indicate a magnet, a 24-line base film, 25 a magnetic paint, 26, 27R guide rollers, and an arrow 28 the direction in which the base film travels.
本実施例は第４図に示す如く、ガイドローラ２６．２７
によって走行するベースフィルム２４Ｃ該ベースフイル
ムの表面には予め磁性塗料２ｉがストライプ状に塗布さ
れている。）の裏面に近接して複数個の磁石２０，２１
．２２．２３が設けられておシ、その磁極はＮ、８が交
互にベースフィルム２４に対向するように配置されて込
る。In this embodiment, as shown in FIG. 4, guide rollers 26, 27
The surface of the base film 24C that is run by the magnetic paint 2i is previously applied in stripes. ) A plurality of magnets 20, 21 are placed close to the back surface of the
．． 22 and 23 are provided, and their magnetic poles are arranged such that N and 8 alternately face the base film 24.
なお磁石２０〜２３は永久磁石又は電磁石の何れであっ
てもよい。Note that the magnets 20 to 23 may be either permanent magnets or electromagnets.
このように構成された本実施例は、ベースフィルム２４
が矢印２Ｂの方向に走行すると、その上にストライプ状
に印刷された未硬化の磁性塗料２５は磁石２０〜２！Ｉ
ｋよって２５′の如く平滑化される。その理由は第５図
に示す如く複数個の磁石２０〜２３がそのＮ、８の磁極
を交互にベースフィルム２４に対向するように配置され
ているため、図の如くベースフィルム２４を斜に横切る
磁界２９が複数個所に生じ、この磁界によりて磁性塗料
２５中の磁粉がａ ｗ ｂ ｅ ａ ｅ ｄの如く回転
しながら進行する。その結果あたかも海岸の砂粒群が打
寄せる波によって大粒の砂粒は下層に沈み、細粒が上層
に集まり、その表層面が平滑化されると同様にして磁性
塗料面が平滑化されるのである。In this embodiment configured in this way, the base film 24
runs in the direction of arrow 2B, the uncured magnetic paint 25 printed in stripes on it becomes magnets 20-2! I
k is smoothed as 25'. The reason for this is that, as shown in FIG. 5, a plurality of magnets 20 to 23 are arranged so that their N and 8 magnetic poles alternately face the base film 24. Magnetic fields 29 are generated at a plurality of locations, and due to these magnetic fields, the magnetic particles in the magnetic paint 25 advance while rotating like an a w b e a e d. As a result, the large sand grains sink to the lower layer and the finer grains gather in the upper layer, and the surface of the magnetic paint is smoothed in the same way as the waves hitting the sand grains on the beach.
一般に磁気テープの平滑＆は第６図に示す如く残留磁束
密度Ｂｒと磁束密度Ｂｍの比で表わされる角形比Ｂｒ／
Ｂｍに反比例するが、本発明によればこの角形比が０．
８５〜０．９９となシ従来の０．８程度に比し著しくそ
の平滑度が向上される。In general, the smoothness & of a magnetic tape is expressed by the squareness ratio Br/, which is expressed as the ratio of the residual magnetic flux density Br to the magnetic flux density Bm, as shown in Figure 6.
Although it is inversely proportional to Bm, according to the present invention, this squareness ratio is 0.
The smoothness is 85 to 0.99, which is significantly improved compared to the conventional 0.8.
発明の効果
以上、詳細に説明したように本発明の磁性塗料塗布装置
のスムーザ−はベースフィルムに対向シてＮ、８極を交
互に配置した複数個の磁石を設けることにより、ストラ
イプ状に塗布された磁性塗料を非接触で且つ精度良く平
滑化することを可能にするといった効果大なるものであ
る。Effects of the Invention As explained in detail above, the smoother of the magnetic paint coating device of the present invention is capable of coating in stripes by providing a plurality of magnets with N and 8 poles arranged alternately facing the base film. This has the great effect of making it possible to smooth the magnetic paint without contact and with high accuracy.
第１図は従来の磁性塗料塗布装置を説明するための図、
第２図はベースフィルムに磁性塗料をストライプ状に塗
布した状態を示す図、第３図は従来の磁性塗料塗布装置
のスムーザ−を説明するための図、第４図線本発明によ
る磁性塗料塗布装置のスムーザ−を説明するための図、
第５図線その作用の原理を説明するための図、第６図は
平滑化された磁性塗料の表面粗度と角形比との関係を示
す図である。
図面におりて、２０〜２３＃：を磁石、２４ ｉｊ ヘ
−スフィルム、２５は磁性塗料をそｈぞれ示す。
第１図
第２図
ｖＩＳ３図
第４図Figure 1 is a diagram for explaining a conventional magnetic paint coating device.
Fig. 2 is a diagram showing a state in which magnetic paint is applied in stripes on a base film, Fig. 3 is a diagram for explaining a smoother of a conventional magnetic paint coating device, and Fig. 4 is a diagram showing magnetic paint applied according to the present invention. A diagram for explaining the smoother of the device,
Fig. 5 is a diagram for explaining the principle of its operation, and Fig. 6 is a diagram showing the relationship between the surface roughness and squareness ratio of a smoothed magnetic paint. In the drawings, numbers 20 to 23 represent magnets, 24 represents a hair film, and 25 represents a magnetic paint. Figure 1 Figure 2 vIS3 Figure 4
Claims (1)
プ状に塗布された磁性塗料を未硬化のうちにその厚さを
一様にするためのスムーザ−であって、ガイドローラに
よって走行するベースフィルムの裏面に近接し、Ｎ−８
の磁極を交互にベースフィルムに対向させた複数個の磁
石を配置し、ベースフィルムの磁性塗料塗布面に非接触
でスムージングを行なうことを特徴とする磁性塗料塗布
装置のスムーザ−０1. A smoother for uniformizing the thickness of the magnetic paint applied in stripes by the coating method on the base film while it is not yet cured; the back surface of the base film is moved by a guide roller. Close to N-8
Smoother-0, a magnetic paint coating device, is characterized in that a plurality of magnets are arranged with magnetic poles facing the base film alternately, and smoothing is performed on the magnetic paint coated surface of the base film in a non-contact manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5724284A JPS60202542A (en) | 1984-03-27 | 1984-03-27 | Smoother for coating device of magnetic coating material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5724284A JPS60202542A (en) | 1984-03-27 | 1984-03-27 | Smoother for coating device of magnetic coating material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60202542A true JPS60202542A (en) | 1985-10-14 |
Family
ID=13050061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5724284A Pending JPS60202542A (en) | 1984-03-27 | 1984-03-27 | Smoother for coating device of magnetic coating material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60202542A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6342031A (en) * | 1986-08-07 | 1988-02-23 | Tokyo Jiki Insatsu Kk | Method and apparatus for production of perpendicular magnetic recording medium |
| FR2756406A1 (en) * | 1996-11-20 | 1998-05-29 | Sony Corp | Magnetic layer depositing device for magnetic recording supports |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59148140A (en) * | 1983-02-14 | 1984-08-24 | Fuji Photo Film Co Ltd | Production of magnetic recording medium |
-
1984
- 1984-03-27 JP JP5724284A patent/JPS60202542A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59148140A (en) * | 1983-02-14 | 1984-08-24 | Fuji Photo Film Co Ltd | Production of magnetic recording medium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6342031A (en) * | 1986-08-07 | 1988-02-23 | Tokyo Jiki Insatsu Kk | Method and apparatus for production of perpendicular magnetic recording medium |
| FR2756406A1 (en) * | 1996-11-20 | 1998-05-29 | Sony Corp | Magnetic layer depositing device for magnetic recording supports |
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