JPH0731918A - Bar coating applicator - Google Patents
Bar coating applicatorInfo
- Publication number
- JPH0731918A JPH0731918A JP20175793A JP20175793A JPH0731918A JP H0731918 A JPH0731918 A JP H0731918A JP 20175793 A JP20175793 A JP 20175793A JP 20175793 A JP20175793 A JP 20175793A JP H0731918 A JPH0731918 A JP H0731918A
- Authority
- JP
- Japan
- Prior art keywords
- back edge
- web
- coating
- bar
- coating liquid
- 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
【０００１】[0001]
【産業上の利用分野】本発明はバー塗布装置に関し、更
に詳しくは、連続走行するウェブの表面に向けて連続的
に塗布液を供給、塗布し、回転バーにより塗布量を制御
するバー塗布装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar coating device, and more particularly to a bar coating device for continuously supplying and coating a coating liquid toward the surface of a continuously running web and controlling the coating amount by a rotary bar. It is about.
【０００２】[0002]
【従来の技術】従来のバー塗布装置は、塗布液をウェブ
の表面に供給する塗布液供給部と、ウェブ表面に塗布さ
れた塗布液の過剰分を回転バーで掻き落として所望の塗
布量に制御する塗布量制御部とが独立に配置されてい
た。このため、個別に塗布のための条件を設定する必要
があり装置設計が煩雑であるばかりでなく、広い設置ス
ペースが必要であった。2. Description of the Related Art A conventional bar coating apparatus has a coating liquid supply section for supplying the coating liquid to the surface of the web, and an excessive amount of the coating liquid applied to the surface of the web is scraped off by a rotary bar to obtain a desired coating amount. The coating amount control unit for controlling was arranged independently. Therefore, it is necessary to set the conditions for coating individually, which complicates the device design and requires a large installation space.
【０００３】このような不具合を解消するため、特開昭
５３−２２５４４３号公報には、塗布液供給部と塗布量
制御部とを一体化したバー塗布装置が提案されている。
図３はこのバー塗布装置の構造を模式的に示す断面図で
ある。図中２１は塗布液の塗布量を制御する回転バー、
２２は支持部２２Ａにて回転バー２１を回転自在に支持
する支持部材、２３は塗布液、２４は塗布液２３の供給
口、２５は堰部材、２６は塗布液案内溝、２７は液だま
り、２８はウェブ、２９は塗膜である。この装置では、
塗布液２３は供給口２４より、支持部材２２と堰部材２
５との間に形成された塗布液案内溝２６内に供給され、
その先端位置にて回転バー２１によりピックアップさ
れ、ウェブ２８表面に塗布される。この際、回転バー２
１とウェブ２８との接触部において塗布液２３の塗布量
が制御され、所要量以外の塗布液は流下して液だまり２
７が形成される。そして、この液だまり２７の大きさを
一定に保つため、過剰の塗布液の一部は堰部材２５を越
えて流下するようになっている。In order to solve such a problem, Japanese Unexamined Patent Publication No. 53-225443 proposes a bar coating device in which a coating liquid supply unit and a coating amount control unit are integrated.
FIG. 3 is a sectional view schematically showing the structure of this bar coating device. Reference numeral 21 in the figure is a rotary bar for controlling the coating amount of the coating liquid,
Reference numeral 22 is a support member that rotatably supports the rotary bar 21 at the support portion 22A, 23 is a coating liquid, 24 is a supply port for the coating liquid 23, 25 is a dam member, 26 is a coating liquid guide groove, and 27 is a liquid pool. 28 is a web and 29 is a coating film. With this device,
The coating liquid 23 is supplied from the supply port 24 to the supporting member 22 and the dam member 2
5 is supplied into the coating liquid guide groove 26 formed between
The tip end position is picked up by the rotary bar 21 and applied on the surface of the web 28. At this time, the rotating bar 2
The coating amount of the coating liquid 23 is controlled at the contact portion between the 1 and the web 28, and the coating liquid other than the required amount flows down and the liquid pool 2
7 is formed. Then, in order to keep the size of the liquid pool 27 constant, a part of the excess coating liquid flows down over the dam member 25.
【０００４】一方、特開平２−９０９７２号公報には、
図３の装置を更に改良したバー塗布装置が提案されてい
る。図４にこの装置の構造を断面図で模式的に示す。図
中図３と同様な要素には同じ符号を付してある。この装
置は、図３の装置に対し、堰部材２５’として図示のよ
うな構造を採用したことに特徴がある。即ち、堰部材２
５’の上端部を、回転バー２１とウェブ２８の接触部に
近接させるとともに、堰部材２５’の上方の内壁と回転
バー２１との間隔を狭め、小さな液だまり２７’を形成
するものである。これにより、流動性の低い塗布液を塗
布する場合における塗布面のスジ発生を防止している。On the other hand, Japanese Patent Laid-Open No. 2-90972 discloses that
A bar coating device has been proposed which is a further improvement of the device shown in FIG. FIG. 4 schematically shows the structure of this device in a sectional view. In the figure, elements similar to those in FIG. 3 are designated by the same reference numerals. This device is characterized in that, as compared with the device shown in FIG. 3, the dam member 25 'has the structure shown in the drawing. That is, the weir member 2
The upper end of 5'is brought close to the contact portion between the rotary bar 21 and the web 28, and the interval between the inner wall above the dam member 25 'and the rotary bar 21 is narrowed to form a small liquid pool 27'. . This prevents the occurrence of streaks on the coated surface when the coating liquid having low fluidity is coated.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記公
報に記載のバー塗布装置では、塗布液供給部と塗布量制
御部が個別配置されている場合における不具合は解消さ
れるものの、塗布液の供給量の変動によりメニスカス位
置が移動し、ウェブに同伴する空気が供給液中に侵入
し、塗膜欠陥を発生することがある。また、塗布液の供
給量を塗布液量より過剰にした場合、ウェブに対向する
堰部材上端部ウェブ進行方向長さが短い為、余剰液排出
抵抗が発生しても小さい。この結果、ウェブに対し濡れ
性の悪い塗布液を塗布しようとした時塗布液の液圧が小
さく、液圧による濡れ性補助効果が得られない為、均一
な塗膜が形成されずまだら状塗布面となってしまうとい
う問題がある。さらに、長期使用により回転バーの支持
部材の支持部が摩耗した場合には、その摩耗部分を切削
して再度繰り返し使用するが、再組立する際、回転バー
と堰部材との位置合わせに精度が要求されるため、再組
立に非常に手間がかかるという問題がある。However, in the bar coating apparatus described in the above publication, although the problems in the case where the coating liquid supply unit and the coating amount control unit are individually arranged are eliminated, the amount of the coating liquid supplied is eliminated. The movement of the meniscus position may cause the air entrained in the web to enter the supply liquid, resulting in a coating film defect. Further, when the supply amount of the coating liquid is more than the coating liquid amount, since the length of the upper end portion of the dam member facing the web in the traveling direction of the web is short, the excess liquid discharge resistance is small. As a result, when an attempt is made to apply a coating liquid with poor wettability to the web, the liquid pressure of the coating liquid is small, and the effect of assisting wettability by the liquid pressure cannot be obtained, so a uniform coating film is not formed and mottled coating There is a problem that it becomes a surface. Furthermore, when the supporting portion of the supporting member of the rotating bar is worn due to long-term use, the worn portion is cut and repeatedly used again, but when reassembling, the accuracy of alignment between the rotating bar and the dam member is high. Since it is required, there is a problem that reassembly is extremely troublesome.
【０００６】本発明の目的は、上記従来技術の問題点を
解消し、メニスカス位置の変動によるウェブ同伴空気の
侵入に起因する塗膜欠陥の発生が防止され、高品質の塗
膜が形成された製品の提供が可能なバー塗布装置を提供
することにある。また、本発明の別の目的は、塗布液の
液圧のより高圧化を可能とし、ウェブに対し濡れ性の悪
い塗布液でも均一な塗膜の形成が可能なバー塗布装置を
提供することにあり、かつ回転バーの支持部材の再組立
が容易に行うことのできるバー塗布装置を提供すること
にある。The object of the present invention is to solve the above-mentioned problems of the prior art, prevent the occurrence of coating film defects due to the intrusion of air entrained in the web due to the fluctuation of the meniscus position, and form a high quality coating film. It is to provide a bar coating device capable of providing products. Further, another object of the present invention is to provide a bar coating apparatus which enables the liquid pressure of the coating liquid to be increased and which can form a uniform coating film even with the coating liquid having poor wettability with respect to the web. It is an object of the present invention to provide a bar coating device that can easily reassemble a support member for a rotating bar.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本発明によれば、連続走行するウェブの表面に塗布
液を連続的に押出して塗布するための装置であって、塗
布量を制御するための回転バーと、上部に該回転バーを
支持する支持部を有する支持部材と、該支持部材に隣接
して配置され、連続走行するウェブの表面と略平行なバ
ックエッジ面を上部に有するバックエッジ部と、該支持
部材と該バックエッジ部の対向する側壁間に形成され、
先端部が該回転バーと該ウェブとの接触部の直前に臨
む、塗布液を供給するためのスロットとを具備し、か
つ、該バックエッジ部のバックエッジ面のウェブ走行方
向長さを、該回転バーと該ウェブとの接触部の直前に形
成される塗布液の液だまりのメニスカスの位置変動長さ
に対して十分長く設定したことを特徴とするバー塗布装
置が提供される。また、本発明によれば、上記構成にお
いて、該支持部材を該バックエッジ部に対して上下方向
に相対的に移動させる機構を有することを特徴とするバ
ー塗布装置が提供される。In order to achieve the above object, according to the present invention, there is provided a device for continuously extruding and applying a coating solution onto the surface of a continuously running web, the coating amount being controlled. A rotation bar for supporting the rotation bar, a support member having a support portion for supporting the rotation bar on the upper portion, and a back edge surface, which is disposed adjacent to the support member and is substantially parallel to the surface of the continuously running web, on the upper portion Formed between the back edge portion and the opposing side walls of the support member and the back edge portion,
The front end portion is provided with a slot for supplying a coating liquid, which is exposed immediately before the contact portion between the rotary bar and the web, and the length of the back edge surface of the back edge portion in the web running direction is There is provided a bar coating device characterized in that it is set sufficiently long with respect to the position variation length of the meniscus of the liquid pool of the coating liquid formed immediately before the contact portion between the rotating bar and the web. Further, according to the present invention, there is provided a bar coating device having the above-mentioned structure, which has a mechanism for moving the supporting member in the vertical direction relative to the back edge portion.
【０００８】[0008]
【作用】請求項１の装置では、バックエッジ部のバック
エッジ面が上記のように構成されていることから、塗布
液の液圧が変動してもメニスカスの位置がバックエッジ
面の範囲より逸脱することがないので、ウェブ同伴空気
が塗布液中に侵入することが効果的に防止され、塗布欠
陥のない高品質な製品を提供することが可能となる。請
求項２の装置では、上記機構により、支持部材をバック
エッジ部に対して相対的に上下方向に容易にかつ精度よ
く移動させることができるので、再組立に手間を要しな
い。In the apparatus of claim 1, since the back edge surface of the back edge portion is configured as described above, the position of the meniscus deviates from the range of the back edge surface even if the fluid pressure of the coating liquid changes. Since it does not occur, it is possible to effectively prevent the air entrained in the web from penetrating into the coating liquid, and it is possible to provide a high-quality product without coating defects. In the apparatus according to the second aspect, since the support member can be moved easily and accurately in the vertical direction relative to the back edge portion by the mechanism, reassembling does not require labor.
【０００９】[0009]
【実施例】以下本発明を実施例に基づき詳細に説明す
る。図中１は塗布液の塗布量を制御するための回転バー
であり、公知のワイヤーバー或いは溝切りバーを用いる
ことができる。回転バー１は支持部材２の上方に形成さ
れた支持部２Ａにて回転自在に支持され、ウェブ７との
間にトラップされた異物を排出するよう回転可能となっ
ている。支持部２Ａは回転バー１をその全長にわたって
支持し、回転バー１のたわみの発生を防止している。ま
た支持部材２にはスロット６に連通する塗布液３の供給
口４が形成されている。塗布液３の供給口４位置は支持
部材２に限定されるものでなく、バックエッジ面５に設
けても何ら問題はない。一方、支持部材２に隣接してバ
ックエッジ部５が形成されており、このバックエッジ部
５と支持部材２との間には塗布液を供給するためのスロ
ット６が形成され、その先端部はウェブ７と回転バー１
との接触部の直前に臨み、該直前部分において塗布液３
の液だまり８が形成されるようになっている。またバッ
クエッジ部５の上面は走行するウェブ７の面と略平行な
バックエッジ面５Ａとなっている。このバックエッジ面
５Ａは、そのウェブ走行方向長さが液だまり８のメニス
カス９の位置変動長さに対して十分長く設定されてい
る。さらに、支持部材２とバックエッジ部５は、押しネ
ジ１０と引きネジ１１により相対的に上下方向に移動可
能となっている。なお、図中１２はパスロール、１３は
塗膜である。EXAMPLES The present invention will be described in detail below based on examples. Reference numeral 1 in the drawing denotes a rotary bar for controlling the coating amount of the coating liquid, and a known wire bar or groove cutting bar can be used. The rotating bar 1 is rotatably supported by a supporting portion 2A formed above the supporting member 2 and is rotatable so as to discharge foreign matter trapped between the rotating bar 1 and the web 7. The support portion 2A supports the rotary bar 1 over its entire length and prevents the rotary bar 1 from being bent. Further, the support member 2 is provided with a supply port 4 for the coating liquid 3 which communicates with the slot 6. The position of the supply port 4 for the coating liquid 3 is not limited to the support member 2 and may be provided on the back edge surface 5 without any problem. On the other hand, a back edge portion 5 is formed adjacent to the support member 2, a slot 6 for supplying the coating liquid is formed between the back edge portion 5 and the support member 2, and the tip portion thereof is Web 7 and rotating bar 1
Immediately before the contact portion with the coating liquid 3
The liquid pool 8 is formed. The upper surface of the back edge portion 5 is a back edge surface 5A that is substantially parallel to the surface of the traveling web 7. The length of the back edge surface 5A in the web traveling direction is set sufficiently longer than the position variation length of the meniscus 9 of the liquid pool 8. Further, the support member 2 and the back edge portion 5 can be relatively moved in the vertical direction by a push screw 10 and a pull screw 11. In the figure, 12 is a pass roll and 13 is a coating film.
【００１０】次に、上記構成の装置の動作を述べる。塗
布液３は図示しない給液手段により供給口４からスロッ
ト６を介して、ウェブ７と回転バー１との接触部の直前
に連続的に押し出され、そこに液だまり８が形成され
る。この際、液だまり８のメニスカス９はバックエッジ
面５Ａのウェブ走行方向における範囲内に位置すること
になる。この状態で、液だまり８の塗布液の一部は回転
バー１によりピックアップされ、連続走行するウェブ７
の面に塗布される。その塗布量は回転バー１で制御さ
れ、所望厚の塗膜１３がウェブ７の面上に形成される。Next, the operation of the apparatus having the above configuration will be described. The coating liquid 3 is continuously extruded from a supply port 4 through a slot 6 by a liquid supply means (not shown) immediately before a contact portion between the web 7 and the rotary bar 1, and a liquid pool 8 is formed there. At this time, the meniscus 9 of the liquid pool 8 is located within the range of the back edge surface 5A in the web traveling direction. In this state, a part of the coating liquid in the liquid pool 8 is picked up by the rotary bar 1 and the continuously running web 7
Applied to the surface of. The coating amount is controlled by the rotary bar 1, and the coating film 13 having a desired thickness is formed on the surface of the web 7.
【００１１】上記塗膜形成にあたって、本実施例の装置
では、バックエッジ面５Ａのウェブ走行方向長さが液だ
まり８のメニスカス９の位置変動長さに対して十分長く
設定されているので、塗布液３の供給量の変動があって
も、メニスカス９の位置が変動することにより塗布液３
の液圧が調整されるため、液圧の変動による塗膜厚さの
変動を防止することが可能となる上、メニスカス９はバ
ックエッジ面５Ａの範囲内で移動するようになっている
ため、ウェブ同伴空気の侵入が効果的に防止される。さ
らに、塗布液量より塗布液の供給量を過剰とすることに
より予剰供給液がウェブとバックエッジ面の間を通過排
出され発生する塗布液の液圧が高くなり、ウェブに対し
濡れ性の悪い塗布液でも濡れ性補助効果が得られるた
め、塗膜をより高品質化することが可能となる。In forming the coating film, in the apparatus of this embodiment, the length of the back edge surface 5A in the web running direction is set sufficiently longer than the position variation length of the meniscus 9 of the liquid pool 8. Even if the supply amount of the liquid 3 fluctuates, the position of the meniscus 9 fluctuates, so that the coating liquid 3
Since the liquid pressure of is adjusted, it is possible to prevent the change of the coating film thickness due to the change of the liquid pressure, and since the meniscus 9 moves within the range of the back edge surface 5A, Intrusion of air accompanied by the web is effectively prevented. Further, by making the supply amount of the coating liquid excessive relative to the coating liquid amount, the pre-supplied supply liquid is discharged through the gap between the web and the back edge surface, and the liquid pressure of the generated coating liquid becomes high, so that the wettability of the web is reduced. Since a wettability auxiliary effect can be obtained even with a bad coating liquid, it becomes possible to further improve the quality of the coating film.
【００１２】また、上記装置では、長期使用により支持
部材２の支持部２Ａが摩耗した場合、切削後の再組立時
に押しネジ１０及び引きネジ１１により、支持部材２と
バックエッジ部５の上下方向の相対位置の微調整を手間
をかけずに容易かつ迅速に行うことが可能となる。Further, in the above apparatus, when the support portion 2A of the support member 2 is worn due to long-term use, the push screw 10 and the pull screw 11 are used to relieve the support member 2 and the back edge portion 5 in the vertical direction during reassembly after cutting. It becomes possible to easily and promptly perform fine adjustment of the relative position of the above without any trouble.
【００１３】以上本発明を一実施例により説明してきた
が、本発明は上記実施例のみに限定されるものではな
く、種々の変形、変更が可能である。Although the present invention has been described with reference to one embodiment, the present invention is not limited to the above embodiment, and various modifications and changes can be made.
【００１４】[0014]
【発明の効果】本発明によれば、前記構成としたので、
メニスカス位置の変動によるウェブ同伴空気の侵入に起
因する塗膜欠陥の発生が防止され、かつ、塗布液の液圧
の高圧化が可能になり、ウェブに対し濡れ性の悪い塗布
液でも均一な塗膜が形成され、高品質の塗膜が形成され
た製品の提供が可能となる。また、支持部材とバックエ
ッジ部の位置調整機構を設けることにより、長期使用に
より支持部材の支持部が摩耗した場合の切削後の再組立
を手間をかけずに容易かつ迅速に行うことが可能とな
る。According to the present invention, because of the above-mentioned structure,
The occurrence of coating film defects due to the intrusion of air accompanying the web due to fluctuations in the meniscus position can be prevented, and the liquid pressure of the coating liquid can be increased so that even coating liquid with poor wettability can be applied uniformly to the web. It is possible to provide a product in which a film is formed and a high quality coating film is formed. Further, by providing a position adjusting mechanism for the support member and the back edge portion, it is possible to easily and quickly perform reassembly after cutting when the support portion of the support member is worn due to long-term use without trouble. Become.
【図１】本発明の一実施例にかかるバー塗布装置の構造
を模式的に示す断面図である。FIG. 1 is a sectional view schematically showing the structure of a bar coating apparatus according to an embodiment of the present invention.
【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図３】従来のバー塗布装置の構造を模式的に示す断面
図である。FIG. 3 is a sectional view schematically showing the structure of a conventional bar coating device.
【図４】従来の別のバー塗布装置の構造を模式的に示す
断面図である。FIG. 4 is a sectional view schematically showing the structure of another conventional bar coating device.
１ 回転バー ２ 支持部材 ２Ａ 支持部 ３ 塗布液 ５ バックエッジ部 ５Ａ バックエ
ッジ面 ６ スロット ７ ウェブ ８ 液だまり ９ メニスカス １０ 押しネジ １１ 引きネジ1 Rotating Bar 2 Support Member 2A Support Part 3 Coating Liquid 5 Back Edge Part 5A Back Edge Surface 6 Slot 7 Web 8 Liquid Pool 9 Meniscus 10 Push Screw 11 Pull Screw
Claims (2)
続的に押出して塗布するための装置であって、 塗布量を制御するための回転バーと、 上部に該回転バーを支持する支持部を有する支持部材
と、 該支持部材に隣接して配置され、連続走行するウェブの
表面と略平行なバックエッジ面を上部に有するバックエ
ッジ部と、 該支持部材と該バックエッジ部の対向する側壁間に形成
され、先端部が該回転バーと該ウェブとの接触部の直前
に臨む、塗布液を供給するためのスロットとを具備し、 かつ、該バックエッジ部のバックエッジ面のウェブ走行
方向長さを、該回転バーと該ウェブとの接触部の直前に
形成される塗布液の液だまりのメニスカスの位置変動長
さに対して十分長く設定したことを特徴とするバー塗布
装置。1. A device for continuously extruding and applying a coating liquid onto the surface of a continuously running web, comprising a rotary bar for controlling the coating amount, and a support portion for supporting the rotary bar on the upper part. A support member having a back edge portion having a back edge surface disposed adjacent to the support member and having a back edge surface substantially parallel to the surface of the continuously running web in an upper portion, and the side wall of the support member facing the back edge portion. And a slot for supplying a coating solution, which is formed between them and whose front end faces immediately before the contact portion between the rotary bar and the web, and the web running direction of the back edge surface of the back edge portion. The bar coating apparatus is characterized in that the length is set to be sufficiently long with respect to the position variation length of the meniscus of the liquid pool of the coating liquid formed immediately before the contact portion between the rotary bar and the web.
上下方向に相対的に移動させる機構を有することを特徴
とする請求項１に記載のバー塗布装置。2. The bar coating apparatus according to claim 1, further comprising a mechanism for moving the support member in a vertical direction relative to the back edge portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20175793A JPH0731918A (en) | 1993-07-22 | 1993-07-22 | Bar coating applicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20175793A JPH0731918A (en) | 1993-07-22 | 1993-07-22 | Bar coating applicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0731918A true JPH0731918A (en) | 1995-02-03 |
Family
ID=16446439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20175793A Pending JPH0731918A (en) | 1993-07-22 | 1993-07-22 | Bar coating applicator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0731918A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008264757A (en) * | 2006-06-28 | 2008-11-06 | Fujifilm Corp | Bar coating method and apparatus |
| JP2010214252A (en) * | 2009-03-13 | 2010-09-30 | Fujifilm Corp | Bar coating device and bar coating method |
| US8349766B2 (en) | 2009-10-21 | 2013-01-08 | Fujifilm Corporation | Thermosensitive recording material |
-
1993
- 1993-07-22 JP JP20175793A patent/JPH0731918A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008264757A (en) * | 2006-06-28 | 2008-11-06 | Fujifilm Corp | Bar coating method and apparatus |
| JP2010214252A (en) * | 2009-03-13 | 2010-09-30 | Fujifilm Corp | Bar coating device and bar coating method |
| US8349766B2 (en) | 2009-10-21 | 2013-01-08 | Fujifilm Corporation | Thermosensitive recording material |
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