JP2001199050A - Method and apparatus for supplying coating liquid - Google Patents
Method and apparatus for supplying coating liquidInfo
- Publication number
- JP2001199050A JP2001199050A JP2000010866A JP2000010866A JP2001199050A JP 2001199050 A JP2001199050 A JP 2001199050A JP 2000010866 A JP2000010866 A JP 2000010866A JP 2000010866 A JP2000010866 A JP 2000010866A JP 2001199050 A JP2001199050 A JP 2001199050A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- liquid
- coating liquid
- curved
- medium
- 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
Landscapes
- Rotary Presses (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は塗布液供給装置の曲
面状塗工媒体に塗布液を供給するための装置に関し、詳
しくは、その塗布液供給装置として用いられる密閉型の
ドクターチャンバーの構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supplying a coating liquid to a curved coating medium of a coating liquid supply apparatus, and more particularly, to a structure of a closed doctor chamber used as the coating liquid supply apparatus. .
【０００２】[0002]
【従来の技術】一般に、塗布液を被塗工物に均一転写す
るには、上面が開放したパンに塗布液を満たし、これに
表面に多数の微細な凹部（セル）を形成した印刷版胴
（曲面状塗工媒体）を浸漬し、回転させながら表面にド
クターを接触させてセル内の塗布液以外の余分な塗布液
を除いた後、セル内の塗布液を被塗工物に転写する方法
が採用されている。2. Description of the Related Art In general, in order to uniformly transfer a coating solution to an object to be coated, a printing plate cylinder is prepared by filling a pan having an open upper surface with the coating solution and forming a large number of fine concave portions (cells) on the surface. (Curved coating medium) is immersed, and a doctor is brought into contact with the surface while rotating to remove excess coating liquid other than the coating liquid in the cell, and then the coating liquid in the cell is transferred to the object to be coated. The method has been adopted.
【０００３】ところが、上記の開放型の塗布液供給装置
には種々の問題がある。具体的には曲面状塗工媒体への
塗工方法としてグラビア方式があるが、例えば特開平１
−２５７０５０号公報では、パン内の塗布液を曲面状塗
工媒体で汲み上げる方式であるため塗布液が飛散しやす
く、この塗布液の飛散は加工物や周囲を汚してしまう。
また塗布液中に気泡が発生し、この気泡を含む塗布液の
使用によって塗工面にはスジ状や点状の塗工むらが生
じ、品質低下を招く。しかも一旦発生した泡は容易に消
えることがない。さらに、開放型の塗布液供給装置は、
塗布液供給部が開放されているため、塗布液の溶媒が揮
発したりして、塗布液の劣化や作業環境の悪化をもたら
す。However, there are various problems with the above-mentioned open type coating liquid supply apparatus. More specifically, there is a gravure method as a method for coating a curved coating medium.
In JP-A-257050, the coating liquid in the pan is pumped up with a curved coating medium, so that the coating liquid is easily scattered, and the scattering of the coating liquid stains a processed product and its surroundings.
In addition, air bubbles are generated in the coating solution, and the use of the coating solution containing the air bubbles causes streak-like or dot-like coating unevenness on the coating surface, resulting in quality deterioration. Moreover, the foam once generated does not disappear easily. Furthermore, the open type coating liquid supply device is
Since the coating liquid supply unit is open, the solvent of the coating liquid is volatilized, which causes the deterioration of the coating liquid and the working environment.
【０００４】かかる開放型の塗布液供給装置の欠点を解
消するものとして、密閉型の塗布液供給装置が、特許第
２５７８０７７号公報、特許第２６９０２７７号公報等
に提案されている。この密閉型塗布液供給装置を本明細
書では「ドクターチャンバー」と呼ぶことにする。とこ
ろが、ここに開示されている装置においては、塗布液は
一方の側面から供給され、他方の側面から排出される
が、ドクターチャンバー内には回転円柱体（曲面状塗工
媒体）の回転により渦をなす液流ができ、そして、この
渦流下では一旦、曲面状塗工媒体に付いた液が戻され再
び塗布液として使われたり、渦により泡が生じやすくな
り、その泡のために塗工面にスジ状や点状の塗工むらを
生じ、品質が低下したりする問題がある。As a solution to the drawbacks of the open type coating liquid supply device, closed type coating liquid supply devices have been proposed in Japanese Patent No. 2578077, Japanese Patent No. 2690277, and the like. This closed type coating liquid supply device is referred to as a “doctor chamber” in this specification. However, in the apparatus disclosed herein, the coating liquid is supplied from one side and discharged from the other side, but the vortex is formed in the doctor chamber by the rotation of the rotating cylindrical body (curved coating medium). Under the vortex, the liquid attached to the curved coating medium is once returned and used again as a coating liquid, or bubbles are easily generated by the vortex. In addition, there is a problem in that streak-like or spot-like coating unevenness is generated and quality is deteriorated.
【０００５】もっとも、特開平８−５８０６９号公報に
記載された密閉型の塗布液供給装置によれば、上記の問
題点はかなり解決される。この装置における塗布方式
は、ドクターチャンバーと曲面状塗工媒体とで塞がれた
空間を形成し、この空間に塗布液が満たされた状態で曲
面状塗工媒体に塗布液を供給するというものであり、空
間に満たされた塗布液は正圧になっているのが前提であ
る。だが、空間に満たされた塗布液に大気圧以上の圧力
が加えられているため、塗布装置の側面や曲面状塗工媒
体とドクターチャンバーのドクター又はシールプレート
との隙間から液もれが発生するという不具合がある。加
えて、この装置においても、供給側の液と排出側の液と
が混ざり合うため、液劣化や汚濁した排出側の液により
ドクターチャンバー内の塗布液の劣化や汚濁を招くとい
う問題も残されている。[0005] However, according to the closed type coating liquid supply device described in Japanese Patent Application Laid-Open No. 8-58069, the above-mentioned problems are considerably solved. The coating method in this apparatus is to form a space closed by a doctor chamber and a curved coating medium, and to supply the coating liquid to the curved coating medium in a state where the space is filled with the coating liquid. It is premised that the application liquid filled in the space has a positive pressure. However, since a pressure higher than the atmospheric pressure is applied to the coating liquid filled in the space, liquid leakage occurs from the side of the coating apparatus or a gap between the curved coating medium and the doctor or seal plate of the doctor chamber. There is a problem that. In addition, also in this apparatus, since the liquid on the supply side and the liquid on the discharge side are mixed, there remains a problem that the liquid on the discharge side which is deteriorated or polluted causes the coating liquid in the doctor chamber to be deteriorated or polluted. ing.
【０００６】[0006]
【発明が解決しようとする課題】本発明の目的は、塗布
液の固化や劣化や汚濁がなく、また装置からの液もれも
泡の発生、塗工面におけるスジ・ムラの発生もない塗布
液供給方法および装置を提供するものである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a coating solution which does not cause solidification, deterioration or contamination of the coating solution, and which does not cause liquid leakage or bubbles from the apparatus and no streak or unevenness on the coating surface. A supply method and apparatus are provided.
【０００７】[0007]
【課題を解決するための手段】本発明によれば、第一
に、曲面状塗工媒体に塗布液を供給する塗布液供給装置
において、該曲面状塗工媒体の軸方向にわたって配置さ
れた密閉型のドクターチャンバー内部にあって、該曲面
状塗工媒体と該ドクターチャンバーとの間の塗布液の液
面が該ドクターチャンバーのドクター及びシールプレー
トと該曲面状塗工媒体表面との接点間にあり、供給側の
液流と排出側の液流が形成され、かつ、両液流が混ざり
合うことのないようにし、さらに供給側の液流を該曲面
状塗工媒体の表面に対し均一に供給するためのラビリン
ス構造体を有することを特徴とする塗布液供給装置が提
供される。According to the present invention, first, in a coating liquid supply device for supplying a coating liquid to a curved coating medium, a sealing liquid disposed in the axial direction of the curved coating medium is provided. Inside the doctor chamber of the mold, the liquid level of the coating liquid between the curved coating medium and the doctor chamber is between the contact point between the doctor and the seal plate of the doctor chamber and the surface of the curved coating medium. A liquid flow on the supply side and a liquid flow on the discharge side are formed, and the two liquid flows are not mixed, and the liquid flow on the supply side is evenly spread on the surface of the curved coating medium. A coating liquid supply device having a labyrinth structure for supply is provided.
【０００８】第二に、前記ラビリンス構造体が遮へい板
を１枚以上互い違いに設けたことを特徴とする上記第一
に記載の塗布液供給装置が提供される。Secondly, there is provided the coating liquid supply device according to the first aspect, wherein the labyrinth structure is provided with one or more shielding plates alternately.
【０００９】第三に、前記ラビリンス構造の隙間の最小
距離が０．１〜１５ｍｍであることを特徴とする上記第
一または第二に記載の塗布液供給装置が提供される。Thirdly, there is provided the coating liquid supply device according to the first or second aspect, wherein the minimum distance of the gap of the labyrinth structure is 0.1 to 15 mm.
【００１０】第四に、前記曲面状塗工媒体が凹部を有す
る印刷版胴であり、前記塗布液供給装置が凹版印刷機で
あることを特徴とする上記第一〜三のいずれかに記載の
塗布液供給装置が提供される。Fourthly, the curved surface coating medium is a printing plate cylinder having a concave portion, and the coating liquid supply device is an intaglio printing machine. An application liquid supply device is provided.
【００１１】第五に、前記塗布液を供給側液流と排出側
液流とに分ける仕切り板をドクターチャンバー内部に設
けたことを特徴とする上記第一〜四のいずれかに記載の
塗布液供給装置が提供される。Fifthly, a coating plate for dividing the coating liquid into a supply-side liquid flow and a discharge-side liquid flow is provided inside the doctor chamber. A supply device is provided.
【００１２】第六に、前記の曲面状塗工媒体表面と仕切
り板との最短間隔が０．１〜１５ｍｍであることを特徴
とする上記第五に記載の塗布液供給装置が提供される。A sixth aspect of the present invention provides the coating liquid supply apparatus according to the fifth aspect, wherein the shortest distance between the surface of the curved coating medium and the partition plate is 0.1 to 15 mm.
【００１３】第七に、前記のドクターと曲面状塗工媒体
表面との接触位置と、前記仕切り板の最高部位置との距
離が、３０ｍｍ以下であることを特徴とする上記第五又
は第六の塗布液供給装置が提供される。Seventh, the distance between the contact position between the doctor and the surface of the curved coating medium and the highest position of the partition plate is 30 mm or less, wherein the distance is 30 mm or less. Is provided.
【００１４】第八に、上記第一〜七のいずれかに記載の
塗布液供給装置を、前記曲面状塗工媒体の軸方向にわた
ってかつその表面に対向して配置し、塗布液の供給を行
うことを特徴とする塗布液供給方法が提供される。Eighth, the coating liquid supply apparatus according to any one of the first to seventh aspects is arranged over the curved surface of the coating medium in the axial direction and opposed to the surface thereof to supply the coating liquid. A method for supplying a coating liquid is provided.
【００１５】第九に、前記塗布液供給装置を該曲面状塗
工媒体の軸方向に揺動させながら塗布液の供給を行うこ
とを特徴とする上記第八に記載の塗布液供給方法が提供
される。Ninth, the coating liquid supply method according to the eighth aspect, wherein the coating liquid is supplied while the coating liquid supply device is oscillated in the axial direction of the curved coating medium. Is done.
【００１６】本発明でいう「曲面状塗工媒体」はそれ自
体が被塗工物で最終製品となるものである場合と、塗布
液を被塗工物に転写し塗工物（最終製品）を得る際の仲
立ちとして使用する場合がある。曲面状塗工媒体は実質
的には一般的な円筒素材、長尺の素材、ウエブや印刷版
胴などのことであり、印刷版胴の具体例としてはグラビ
アロール等の凹版ロールがあげられる。特にグラビアロ
ールは通常印刷画像部が版胴面より凹型に彫り込まれて
いるため、添付した各図面に示したようにドクター３が
グラビアロール１（曲面状塗工媒体）に当接していても
不都合はない。また、本発明でいう「塗布液」とは、イ
ンクの他、サーマルペーパーの塗布液、熱転写リボンの
インク層塗布液、磁気記録体の記録層塗布液など情報記
録用材料の塗布液を含むものである。また、被塗工物と
なるのは紙、ＰＥＴフィルム又はシート等である。The "curved surface coating medium" referred to in the present invention is a case where the coating medium itself is the object to be coated and becomes a final product. May be used as an intermediary in obtaining The curved surface coating medium is substantially a general cylindrical material, a long material, a web or a printing plate cylinder, and a specific example of the printing plate cylinder is an intaglio roll such as a gravure roll. In particular, since the gravure roll has a print image portion generally engraved in a concave shape from the plate cylinder surface, it is inconvenient even if the doctor 3 contacts the gravure roll 1 (curved coating medium) as shown in the attached drawings. There is no. The “coating liquid” in the present invention includes a coating liquid for an information recording material such as a coating liquid for a thermal paper, a coating liquid for an ink layer of a thermal transfer ribbon, and a recording layer for a magnetic recording medium, in addition to ink. . The object to be coated is paper, PET film or sheet.
【００１７】本発明によれば、塗布液面を上部のドクタ
ーと下部のシールプレートとの間に（より正確には、ド
クターと曲面状塗工媒体との接点と、シールプレートと
曲面状塗工媒体との接点との間に）位置させ、曲面状塗
工媒体の回転によって塗布液流（供給側液流〜塗布液膜
〜排出側液流）を形成させることによって、曲面状塗工
媒体に一旦接した液が供給側液へ混入するのを防ぎ、か
つ、塗布液面がドクターチャンバー内に常にあるため液
が正圧にならず、従って液漏れの生じることがない。According to the present invention, the coating liquid surface is placed between the upper doctor and the lower seal plate (more precisely, the contact point between the doctor and the curved coating medium, and between the seal plate and the curved coating medium). (Between the contact point with the medium) and the rotation of the curved coating medium to form a coating liquid flow (supply-side liquid flow to coating liquid film to discharge-side liquid flow). The liquid once contacted is prevented from being mixed into the supply side liquid, and since the surface of the coating liquid is always in the doctor chamber, the liquid does not have a positive pressure, so that there is no liquid leakage.
【００１８】[0018]
【発明の実施の形態】以下、本発明を図面に従いながら
さらに詳細に説明する。図１は本発明に係るドクターチ
ャンバーによって曲面状塗工媒体のセルに塗布液を供給
する様子を表している。図中、２は密閉型ドクターチャ
ンバーを形成する構造体、３はドクター、４はシールプ
レート、１０は塗布液の供給口、１１は塗布液の排出口
である。ドクター３及びシールプレート４は弾性体でつ
くられている。８は供給側液流の方向、９は排出側液流
の方向、１２は塗布液流（塗布液膜）、１３は空間、１
４は塗布液である。また、１９ａは複数箇所に湾曲部を
有するラビリンス構造体である。曲面状塗工媒体の軸方
向にわたってかつその曲面状塗工媒体に対向して設けら
れたドクターチャンバーの内部でドクター３及びシール
プレート４と曲面状塗工媒体の表面１との接点５、６間
に液面７が存在するという例である。この液面７の存在
によって、水平液面７自体は大気圧と常に等しくなり、
それより上位にある塗布液の液圧は大気圧よりやや低く
なるため、装置からの液もれが生じるといったトラブル
は防止される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 shows a state in which a coating liquid is supplied to a cell of a curved coating medium by a doctor chamber according to the present invention. In the figure, reference numeral 2 denotes a structure forming a closed doctor chamber, reference numeral 3 denotes a doctor, reference numeral 4 denotes a seal plate, reference numeral 10 denotes an application liquid supply port, and reference numeral 11 denotes an application liquid discharge port. The doctor 3 and the seal plate 4 are made of an elastic body. Reference numeral 8 denotes a supply-side liquid flow direction, 9 denotes a discharge-side liquid flow direction, 12 denotes a coating liquid flow (coating liquid film), 13 denotes a space,
4 is a coating liquid. Reference numeral 19a denotes a labyrinth structure having curved portions at a plurality of locations. Between the contact points 5 and 6 between the doctor 3 and the seal plate 4 and the surface 1 of the curved coating medium inside a doctor chamber provided in the axial direction of the curved coating medium and opposed to the curved coating medium. Is an example in which a liquid level 7 exists. Due to the presence of this liquid level 7, the horizontal liquid level 7 itself is always equal to the atmospheric pressure,
Since the liquid pressure of the upper coating liquid is slightly lower than the atmospheric pressure, troubles such as liquid leakage from the apparatus are prevented.
【００１９】本発明においては、塗布液については供給
側の液流と排出側の液流とが混ざり合わないようにして
いる。これは曲面状塗工媒体の回転の速さ、塗布液の粘
性などにより、適度の供給側液流と適度の排出側液流を
形成させることによって行うことができる。排出側液流
の出口は、確実に供給側液流と混ざらないように、筒状
体（曲面状塗工媒体)表面の全幅にわたり複数設置され
ていることが好ましい。この供給側液流と排出側液流が
混ざり合わないようにすることによって、仮りに泡の発
生があっても再び供給側液流に混入することはなく、ま
た塗布液の汚濁がなくなり塗工むらのような事態が阻止
される。更にまた、本発明の塗布液供給装置は密閉型で
あるため、塗布液の劣化が起こらないことは言うまでも
ない。In the present invention, the supply liquid flow and the discharge liquid flow of the coating liquid are not mixed. This can be performed by forming an appropriate supply-side liquid flow and an appropriate discharge-side liquid flow depending on the rotation speed of the curved coating medium, the viscosity of the coating liquid, and the like. It is preferable that a plurality of outlets of the discharge-side liquid flow are provided over the entire width of the surface of the cylindrical body (curved coating medium) so as not to be mixed with the supply-side liquid flow. By preventing the supply-side liquid flow and the discharge-side liquid flow from mixing with each other, even if bubbles are generated, they will not be mixed into the supply-side liquid flow again, and the coating liquid will not be contaminated. A situation like unevenness is prevented. Furthermore, since the coating liquid supply device of the present invention is a closed type, it goes without saying that the coating liquid does not deteriorate.
【００２０】また本発明においては、供給側の液流供給
を曲面状塗工媒体の軸方向で均一にする為、供給口１０
よりも通過断面積が狭く、迷路構造を有するラビリンス
（迷路）構造体を有している。これにより出口が絞ら
れ、液は横方向に広がり均一な液供給が可能となる。上
記構造にすることにより、曲面状塗工媒体の巾が長い場
合でも、巾方向にほぼ均一な液供給が可能となり、液量
不足による塗布ムラ発生はない。In the present invention, in order to make the supply of the liquid flow on the supply side uniform in the axial direction of the curved coating medium, the supply port 10 is provided.
It has a labyrinth (maze) structure having a narrower passage cross section and a maze structure. As a result, the outlet is narrowed, and the liquid spreads in the horizontal direction, thereby enabling a uniform liquid supply. By adopting the above structure, even when the width of the curved coating medium is long, it is possible to supply the liquid almost uniformly in the width direction, and there is no occurrence of coating unevenness due to insufficient liquid amount.
【００２１】図２においてはチャンバー内の液面７を確
実に存在させること、供給側液流８と排出側液流９を強
制的かつ完全に分離させることのために、仕切り板１８
設けている。曲面状塗工媒体の表面１と仕切り板１８と
の最短間隔（ｍ）は０．１〜１５ｍｍくらいが好まし
い。ｍ＜０．１ｍｍであると液のくみ上げ量が不足する
可能性があり、ｍ＞１５ｍｍであるとドクター３でかき
落された一部の液が再び供給側の液流に戻る可能性があ
る。また、ドクター３と曲面状塗工媒体の表面１と、接
触位置５の高さと仕切り板１８の最高部位置との距離
（ｎ）は３０ｍｍ以下に設定することが好ましい。ｎ＞
３０ｍｍであると、安定した塗布液流（水平面より上の
塗布液膜）が形成できなくなる。なお、この距離（ｎ）
のところは、空気に暴露されているので、この部分が長
くなると塗布液中の溶媒の揮発が多くなり、乾燥、固
化、劣化が生じてくる。図２は、ラビリンス構造体１９
ｂが供給側の液流部に遮へい板を互い違いに流れ方向に
何重にも重ねて設けた構造の一例を示すものである。図
１の複雑な構造に対しシンプルで、遮へい板２０を増や
す事も容易にできて、筒状体の巾が長くとも均一な液供
給が可能となる。In FIG. 2, a partition plate 18 is provided to ensure that the liquid level 7 in the chamber exists and to forcefully and completely separate the supply-side liquid flow 8 and the discharge-side liquid flow 9.
Provided. The shortest distance (m) between the surface 1 of the curved coating medium and the partition plate 18 is preferably about 0.1 to 15 mm. If m <0.1 mm, the pumping amount of the liquid may be insufficient. If m> 15 mm, a part of the liquid scraped off by the doctor 3 may return to the liquid flow on the supply side again. . The distance (n) between the doctor 3 and the surface 1 of the curved coating medium, the height of the contact position 5 and the highest position of the partition plate 18 is preferably set to 30 mm or less. n>
If it is 30 mm, a stable coating liquid flow (coating liquid film above the horizontal plane) cannot be formed. This distance (n)
In this case, since the part is exposed to air, if this part becomes longer, the solvent in the coating liquid will evaporate more, causing drying, solidification, and deterioration. FIG. 2 shows a labyrinth structure 19.
"b" shows an example of a structure in which shielding plates are alternately provided in the liquid flow portion on the supply side in multiple layers in the flow direction. 1 is simpler than the complicated structure shown in FIG.
【００２２】ラビリンス構造は、その隙間（ｄ）の最小
距離が０．１〜１５ｍｍに設定することが好ましい。隙
間の最小距離が０．１ｍｍ未満になると液供給量不足に
なりがちであり、１５ｍｍを超えると筒状体の巾が長い
場合、部分的に液供給できなくなるおそれが生じ、塗工
の均一化の効果が乏しくなる。In the labyrinth structure, the minimum distance of the gap (d) is preferably set to 0.1 to 15 mm. When the minimum distance of the gap is less than 0.1 mm, the liquid supply amount tends to be insufficient. When the minimum distance is more than 15 mm, when the width of the cylindrical body is long, there is a possibility that the liquid cannot be supplied partially, and the coating becomes uniform. Effect becomes poor.
【００２３】図３は液面７をより確実に制御するために
フロート式の液面センサ１６を設けた例である。ここに
は液面センサ１６が２個ついているが、これは両者の間
に液面を制御するのに好ましい。フロート式センサの利
点は、光学的センサでは検知し難い透明な塗布液の場合
でも着色センサと同様に検知できることである。また、
着火源となるセンサの電気回路を遠ざけることができ
る。このフロート式の液面センサの代りに、超音波反射
式の液面センサ１７を使用でき、これにより装置の簡略
化ができるとともに、光センサ方式において光吸収が強
く検知困難な着色された塗布液にも対応できる。FIG. 3 shows an example in which a float type liquid level sensor 16 is provided in order to control the liquid level 7 more reliably. Although two liquid level sensors 16 are provided here, this is preferable for controlling the liquid level between them. An advantage of the float type sensor is that it can detect even a transparent coating liquid which is difficult to detect with an optical sensor, similarly to a color sensor. Also,
The electric circuit of the sensor serving as the ignition source can be kept away. Instead of the float type liquid level sensor, an ultrasonic reflection type liquid level sensor 17 can be used, which simplifies the apparatus and makes it difficult to detect the colored coating liquid which has strong light absorption in the optical sensor type. Can also respond.
【００２４】図４はチャンバードクター２の側面に設け
られるサイドシール１５の概念図を示したものである。
サイドシール１５は、図４に示したように、チャンバー
ドクター側面からの液もれを防止する為に、側面の形に
沿って形成されているのが好ましい。更にサイドシール
の曲面状塗工媒体と接する部分にスポンジ等の弾性材料
が付けたされていてもよい。サイドシール１５は導電性
の材料でできているのが望ましく、例えば、鉄、アルミ
などの金属の他、プラスチック、弾性材料例えばスポン
ジ、ゴム等に導電材を添加したもの等も使用可能であ
る。サイドシール１５の厚みは５〜２０ｍｍが適当であ
る。FIG. 4 is a conceptual diagram of the side seal 15 provided on the side surface of the chamber doctor 2. As shown in FIG.
As shown in FIG. 4, the side seal 15 is preferably formed along the shape of the side surface to prevent liquid leakage from the side surface of the chamber doctor. Further, an elastic material such as a sponge may be attached to a portion of the side seal in contact with the curved coating medium. The side seal 15 is desirably made of a conductive material. For example, in addition to metals such as iron and aluminum, plastics, elastic materials such as sponge, rubber, and the like, to which a conductive material is added can be used. The thickness of the side seal 15 is suitably 5 to 20 mm.
【００２５】特に、サイドシール１５は表面抵抗値が１
×１０7Ω以下のものが良好で、例えばカーボン練込み
のポリウレタンやポリエチレンなどの樹脂成型物が良
い。表面抵抗値が１×１０7Ωを超えると、静電気発生
の可能性があり危険である。また、サイドシール１５
は、見掛け密度０．０６ｇ／ｃｍ3〜０．２０ｇ／ｃｍ3
のものがよく、カーボン練り込みのポリエチレンフォー
ム（樹脂を発泡した素材、例えばスポンジ）などが特に
好ましい。見掛け密度が０．０６ｇ／ｃｍ3より低いと
強度が落ち、逆に、０．２０ｇ／ｃｍ3より高いと固い
為にシール材としての密着性が劣り、曲面状塗工媒体を
傷つけ、さらに液もれの原因となる。In particular, the side seal 15 has a surface resistance of 1
It is preferable that the resistance is less than × 10 7 Ω, for example, a resin molded product such as polyurethane or polyethylene kneaded with carbon. If the surface resistance exceeds 1 × 10 7 Ω, static electricity may be generated, which is dangerous. Also, the side seal 15
Is an apparent density of 0.06 g / cm 3 to 0.20 g / cm 3
And polyethylene foam (material foamed with resin, for example, sponge) into which carbon is kneaded is particularly preferable. When the apparent density is lower than 0.06 g / cm 3 , the strength is reduced. On the other hand, when the apparent density is higher than 0.20 g / cm 3 , the adhesiveness as a sealing material is inferior due to being hard, and the curved surface coating medium is damaged. It may cause leakage.
【００２６】図５はドクターチャンバー２の排出口１１
が水平に対して液の自由落下による排出機能が実現で
き、吸引手段が不要で速く排出することができるものの
例である。排出角度αは１０°〜８０°が好ましい。１
０°より低いとチャンバー内に発生した泡を排出しにく
く、８０°を超えると排出効率は良くなるが、排出側液
流の流速が高くなり、液ストックタンク内での泡の発生
を招く。また、排出口１１の断面積を供給口１０の断面
積よりも大きくする事により、排出効率を高める構造と
する事ができる。FIG. 5 shows the discharge port 11 of the doctor chamber 2.
Is an example of a device which can realize a discharge function by free fall of a liquid with respect to a horizontal plane, and can discharge quickly without a suction means. The discharge angle α is preferably from 10 ° to 80 °. 1
If it is lower than 0 °, it is difficult to discharge bubbles generated in the chamber, and if it is more than 80 °, the discharge efficiency is improved. However, the flow rate of the liquid flow on the discharge side is increased, and bubbles are generated in the liquid stock tank. Further, by making the cross-sectional area of the discharge port 11 larger than the cross-sectional area of the supply port 10, it is possible to increase the discharge efficiency.
【００２７】図６は経時による塗布液流れの形成過程
（ａ→ｂ→ｃ）を表したものである。（ａ）は静止時の
状態であり、（ｂ）は塗布液が充填されはじめると共に
曲面状塗工媒体が回転しはじめた状態であり、（ｃ）は
供給側液流、塗布液膜、排出側液流の定常流が形成され
た状態を示している。曲面状塗工媒体の回転により、塗
布液の粘性と、曲面状塗工媒体と液の濡れ性等により塗
布液は持ち上げられ塗布液膜の流れを形成し、ドクター
３での掻取り後排出側液流となり排出口より排出され
る。消費される液量に応じた塗布液を供給口から供給す
ると、全流れは滞りがなく定常流となり、これで塗布を
行なう。なお、ここで排出口１１の断面積を供給口１０
の断面積より大きくしておくことにより、排出口内に空
間ができ、ここで生じた泡は開放される。分離された排
出側液流をフィルタ等に通すことにより液を清浄化する
ことができる。FIG. 6 shows the process (a → b → c) of the flow of the coating solution over time. (A) is a state at rest, (b) is a state in which the coating liquid has begun to be filled and the curved coating medium has started to rotate, and (c) is a supply-side liquid flow, a coating liquid film, and discharge. The state where the steady flow of the side liquid flow is formed is shown. Due to the rotation of the curved coating medium, the viscosity of the coating liquid and the wettability between the curved coating medium and the liquid lift the coating liquid to form a flow of the coating liquid film. It becomes a liquid stream and is discharged from the discharge port. When the application liquid corresponding to the consumed liquid amount is supplied from the supply port, the entire flow becomes a steady flow without any delay, and the coating is performed with this. Here, the cross-sectional area of the discharge port 11 is
By making the cross-sectional area larger than the above, a space is created in the outlet, and the foam generated here is released. The liquid can be cleaned by passing the separated discharge-side liquid flow through a filter or the like.
【００２８】図７は軸方向（長手方向）で見たドクター
チャンバーの背面図であり、供給口と排出口の配置の一
例を示している。排出経路の排出口１１の穴は、図７に
示したように、排出側の液を確実に排出するために、複
数個が曲面状塗工媒体の全幅にわたり設置されているこ
とが好ましいが、曲面状塗工媒体の全幅にわたってスリ
ット状に設けられていてもよい。供給口１０の穴は曲面
状塗工媒体の全幅に渡って複数個設けられていてもよい
が、図７に示すように１個であっても良く、また１個の
方が製造が容易である。FIG. 7 is a rear view of the doctor chamber as viewed in the axial direction (longitudinal direction), and shows an example of the arrangement of the supply port and the discharge port. As shown in FIG. 7, in order to reliably discharge the liquid on the discharge side, a plurality of holes in the discharge port 11 of the discharge path are preferably provided over the entire width of the curved coating medium. It may be provided in a slit shape over the entire width of the curved coating medium. A plurality of holes of the supply port 10 may be provided over the entire width of the curved coating medium, but may be one as shown in FIG. 7, and one is easier to manufacture. is there.
【００２９】上記の装置を用いて曲面状塗工媒体の表面
１に塗布液が供給されるが、その際、この塗布液供給装
置を曲面状塗工媒体の軸方向に揺動させながら、塗布液
を供給することにより行われてもよい。曲面状塗工媒体
の表面１に対し、塗布液供給装置を軸方向に揺動させる
ことにより、ドクター３の欠けや傷で発生した塗布スジ
ムラを１ケ所に集中させることなく、みかけ上均一な地
合い（塗布面の均一性）にすることができる。曲面状塗
工媒体の凹部（セル）に充填された塗布液はそのまま
乾燥されて最終製品である塗工物とされるか、あるい
は、図示されていない被塗工物上に転写される。この
転写は曲面状塗工媒体と図示されていない圧胴との間に
被塗工物を通すことにより行なう。なお、前記の場合
は、曲面状塗工媒体は表面にセルが形成されているもの
の他、必要に応じて、セルが形成されていないもの（ウ
エブ等）も用いられてよい。The coating liquid is supplied to the surface 1 of the curved coating medium by using the above-described apparatus. At this time, the coating liquid supply device is swung in the axial direction of the curved coating medium while the coating liquid is supplied. It may be performed by supplying a liquid. By oscillating the coating liquid supply device in the axial direction with respect to the surface 1 of the curved coating medium, the coating streaks generated due to chipping or scratching of the doctor 3 are not concentrated at one place, and an apparently uniform formation is obtained. (Uniformity of the coated surface). The coating liquid filled in the concave portions (cells) of the curved coating medium is dried as it is to obtain a coating product as a final product, or is transferred onto a coating object (not shown). This transfer is performed by passing an object to be coated between a curved coating medium and an impression cylinder (not shown). In the above case, as the curved surface coating medium, in addition to those having cells formed on the surface, those having no cells (web or the like) may be used as necessary.
【００３０】[0030]
【発明の効果】（１）請求項１および４の発明によれ
ば、塗布液の溶媒の揮発による外気の汚染、塗布液の固
化・劣化がなく、塗布液の漏れもなく、泡の発生、塗布
スジ・ムラもなく、また供給側液流と排出側液流との混
じり合いがないため、液劣化がなく、さらにラビリンス
構造体を配置したことにより塗布液が均一に供給され、
従って作業環境は良好で、良質の塗工物が得られる。 （２）請求項２の発明によれば、ラビリンス構造体を遮
へい板を互い違いに設けた構造にしたことにより、より
均一な液供給が行なえる。 （３）請求項３の発明によれば、ラビリンス構造の隙間
の最小距離を０．１〜１５ｍｍにしたことにより、良好
な状態で塗布液を供給することができる。 （４）請求項５〜７の発明によれば、塗布液の供給側液
流と排出側液流とに分ける仕切板を設け、その仕切板の
設置場合を特定したことにより、液面を望ましい位置に
することができ、より良好な塗工が行なえる。 （５）請求項８及び９の発明によれば、良好な塗布液供
給が行なえ、良質の塗工物が得られる。(1) According to the first and fourth aspects of the present invention, there is no contamination of the outside air due to evaporation of the solvent of the coating solution, no solidification / deterioration of the coating solution, no leakage of the coating solution, generation of bubbles, There is no coating streak and unevenness, and there is no mixing between the supply-side liquid flow and the discharge-side liquid flow.Therefore, there is no liquid deterioration, and the coating liquid is uniformly supplied by arranging the labyrinth structure.
Therefore, the working environment is good and a high quality coated product can be obtained. (2) According to the second aspect of the invention, since the labyrinth structure has a structure in which the shielding plates are provided alternately, more uniform liquid supply can be performed. (3) According to the third aspect of the invention, since the minimum distance of the gap of the labyrinth structure is set to 0.1 to 15 mm, the coating liquid can be supplied in a good state. (4) According to the fifth to seventh aspects of the invention, a partition plate for dividing the supply liquid flow and the discharge liquid flow of the coating liquid is provided, and the liquid surface is desirably determined by specifying the installation case of the partition plate. Position so that better coating can be achieved. (5) According to the eighth and ninth aspects of the invention, a good coating liquid can be supplied, and a high quality coated product can be obtained.
【図１】本発明の塗布液供給装置を用いて、曲面状塗工
媒体に塗布液を供給している様子を表した図である。FIG. 1 is a diagram illustrating a state in which a coating liquid is supplied to a curved coating medium using a coating liquid supply device of the present invention.
【図２】本発明の他の塗布液供給装置を用いて、曲面状
塗工媒体に塗布液を供給している様子を表した図であ
る。FIG. 2 is a diagram illustrating a state in which a coating liquid is supplied to a curved coating medium using another coating liquid supply device of the present invention.
【図３】本発明の他の塗布液供給装置を用いて、曲面状
塗工媒体に塗布液を供給している様子を表した図であ
る。FIG. 3 is a diagram illustrating a state in which a coating liquid is supplied to a curved coating medium using another coating liquid supply device of the present invention.
【図４】本発明の塗布液供給装置のサイドシールを説明
するための図である。FIG. 4 is a diagram for explaining a side seal of the coating liquid supply device of the present invention.
【図５】本発明のさらに他の塗布液供給装置を用いて、
曲面状塗工媒体に塗布液を供給している様子を表した図
である。FIG. 5 is a diagram showing another example of the application liquid supply device of the present invention.
FIG. 4 is a diagram illustrating a state in which a coating liquid is supplied to a curved coating medium.
【図６】図６（ａ）（ｂ）（ｃ）は塗布液供給装置の静
止時から運転されるまでの過程を説明するための図であ
る。FIGS. 6 (a), (b) and (c) are views for explaining a process from a standstill of the coating liquid supply apparatus to an operation thereof.
【図７】本発明におけるドクターチャンバーの塗布液供
給口と塗布液排出口との背面での位置関係の一例を示し
た図である。FIG. 7 is a diagram showing an example of a positional relationship on the back surface between a coating liquid supply port and a coating liquid discharge port of a doctor chamber according to the present invention.
１ 曲面状塗工媒体（グラビアロール等）の表面 ２ ドクターチャンバー構造体 ３ ドクター ４ シールプレート ５ 接点 ６ 接点 ７ 液面 ８ 供給側液流 ９ 排出側液流 １０ 供給口 １１ 排出口 １２ 塗布液流（塗布液膜） １３ 空間 １４ 塗布液 １５ サイドシール １６ 液面センサ（フロート式） １７ 液面センサ（超音波反射式） １８ 仕切り板 １９ａ、１９ｂ ラビリンス構造体 ２０ 遮へい板 Reference Signs List 1 Surface of curved coating medium (gravure roll etc.) 2 Doctor chamber structure 3 Doctor 4 Seal plate 5 Contact 6 Contact 7 Liquid level 8 Supply-side liquid flow 9 Discharge-side liquid flow 10 Supply port 11 Discharge port 12 Coating liquid flow (Coating liquid film) 13 Space 14 Coating liquid 15 Side seal 16 Liquid level sensor (float type) 17 Liquid level sensor (ultrasonic reflection type) 18 Partition plate 19a, 19b Labyrinth structure 20 Shield plate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 原 哲也 東京都大田区中馬込１丁目３番６号 株式 会社リコー内 Ｆターム(参考） 2C250 DB14 DB19 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tetsuya Hara 1-3-6 Nakamagome, Ota-ku, Tokyo F-term in Ricoh Co., Ltd. (reference) 2C250 DB14 DB19
Claims (9)
液供給装置において、該曲面状塗工媒体の軸方向にわた
って配置された密閉型のドクターチャンバー内部にあっ
て、該曲面状塗工媒体と該ドクターチャンバーとの間の
塗布液の液面が該ドクターチャンバーのドクター及びシ
ールプレートと該曲面状塗工媒体表面との接点間にあ
り、供給側の液流と排出側の液流が形成され、かつ、両
液流が混ざり合うことのないようにし、さらに供給側の
液流を該曲面状塗工媒体の表面に対し均一に供給するた
めのラビリンス構造体を有することを特徴とする塗布液
供給装置。1. A coating liquid supply apparatus for supplying a coating liquid to a curved coating medium, wherein the coating liquid is provided inside a closed doctor chamber disposed in the axial direction of the curved coating medium. The liquid level of the coating liquid between the medium and the doctor chamber is between the contact points between the doctor and seal plate of the doctor chamber and the curved coating medium surface, and the liquid flow on the supply side and the liquid flow on the discharge side are It is characterized in that it has a labyrinth structure for forming and preventing both liquid streams from being mixed with each other and for uniformly supplying the liquid stream on the supply side to the surface of the curved coating medium. Coating liquid supply device.
互い違いに設けたことを特徴とする請求項１記載の塗布
液供給装置。2. The coating liquid supply device according to claim 1, wherein the labyrinth structure has one or more shielding plates provided alternately.
１〜１５ｍｍであることを特徴とする請求項１または２
記載の塗布液供給装置。3. The minimum distance of the gap of the labyrinth structure is 0.
3. The method according to claim 1, wherein the distance is 1 to 15 mm.
The coating liquid supply device as described in the above.
であり、塗布液供給装置が凹版印刷機であることを特徴
とする請求項１〜３のいずれかに記載の塗布液供給装
置。4. The coating liquid supply device according to claim 1, wherein the curved coating medium is a printing plate cylinder having a concave portion, and the coating liquid supply device is an intaglio printing machine. .
ける仕切り板をドクターチャンバー内部に設けたことを
特徴とする１〜４のいずれかに記載の塗布液供給装置。5. The coating liquid supply apparatus according to claim 1, wherein a partition plate for dividing the coating liquid into a supply liquid flow and a discharge liquid flow is provided inside the doctor chamber.
間隔が０．１〜１５ｍｍであることを特徴とする請求項
５記載の塗布液供給装置。6. The coating liquid supply device according to claim 5, wherein the shortest distance between the surface of the curved coating medium and the partition plate is 0.1 to 15 mm.
位置と、仕切り板の最高部位置との距離が、３０ｍｍ以
下であることを特徴とする請求項５又は６記載の塗布液
供給装置。7. The coating liquid supply device according to claim 5, wherein a distance between a contact position between the doctor and the surface of the curved coating medium and a highest position of the partition plate is 30 mm or less. .
供給装置を曲面状塗工媒体の軸方向にわたってかつその
曲面状塗工媒体表面に対向して配置し、塗布液の供給を
行うことを特徴とする塗布液供給方法。8. The coating liquid supply device according to claim 1, which is arranged in the axial direction of the curved coating medium and opposed to the surface of the curved coating medium to supply the coating liquid. A coating solution supply method.
向に揺動させながら塗布液の供給を行うことを特徴とす
る請求項８記載の塗布液供給方法。9. The coating liquid supply method according to claim 8, wherein the coating liquid is supplied while the coating liquid supply device is swung in the axial direction of the curved coating medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000010866A JP4283961B2 (en) | 2000-01-19 | 2000-01-19 | Coating liquid supply method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000010866A JP4283961B2 (en) | 2000-01-19 | 2000-01-19 | Coating liquid supply method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001199050A true JP2001199050A (en) | 2001-07-24 |
| JP4283961B2 JP4283961B2 (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000010866A Expired - Lifetime JP4283961B2 (en) | 2000-01-19 | 2000-01-19 | Coating liquid supply method and apparatus |
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| JP (1) | JP4283961B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011100284A1 (en) * | 2010-05-27 | 2011-12-01 | Heidelberger Druckmaschinen Ag | Device for dosing e.g. paint, on raster roll of offset printing machine, has filling elements arranged against respective wall side surface and at outer side of container, where side surface is turned away from coating fluid |
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2000
- 2000-01-19 JP JP2000010866A patent/JP4283961B2/en not_active Expired - Lifetime
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| JP4283961B2 (en) | 2009-06-24 |
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