JP2000117945A - Coating liquid supplying apparatus - Google Patents

Coating liquid supplying apparatus

Info

Publication number
JP2000117945A
JP2000117945A JP29366398A JP29366398A JP2000117945A JP 2000117945 A JP2000117945 A JP 2000117945A JP 29366398 A JP29366398 A JP 29366398A JP 29366398 A JP29366398 A JP 29366398A JP 2000117945 A JP2000117945 A JP 2000117945A
Authority
JP
Japan
Prior art keywords
liquid
coating
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.)
Pending
Application number
JP29366398A
Other languages
Japanese (ja)
Inventor
Tetsuya Tanaka
哲也 田中
Tetsuya Hara
哲也 原
Yoshihiko Hiyoshi
好彦 日吉
Norihiro Otsuka
典宏 大塚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP29366398A priority Critical patent/JP2000117945A/en
Publication of JP2000117945A publication Critical patent/JP2000117945A/en
Pending legal-status Critical Current

Links

Landscapes

  • Coating Apparatus (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

PROBLEM TO BE SOLVED: To rapidly discharge a cleaning liquid or the like by incorporating a discharging angle capable of freely dropping a liquid in a drain port of the liquid after coating in a sealed type doctor chamber. SOLUTION: Since a drain port 11 has a discharging angle capable of freely dropping a liquid, a suction means is eliminated, and the liquid can be rapidly drained. The angle α is preferably 10 to 80 deg.. If the angle is less than 10 deg., bubbles generated in the chamber or deteriorated liquid is not smoothly discharged. If the angle exceeds 80 deg., its discharging efficiency is upgraded but a flowing speed of the discharged liquid flow becomes excessively high so that bubbles are generated in a liquid stock tank. A sectional area (A) of he port 11 is made larger than that (B) of a supply port 10, the discharging efficiency can be enhanced. Thus, the coating liquid can be efficiently discharged only by its own weight without using a special means. Further, a coating liquid flowing speed is accelerated, discharging of the bubbles is expedited, a midway drying is prevented, and discharging of a cleaning liquid is accelerated.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は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, and more particularly, to the 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 transfer a coating solution to an object to be coated, a pan having an open upper surface is filled with the coating solution, and a printing plate cylinder having a large number of fine recesses (cells) formed on the surface thereof. A method of transferring a coating liquid in a cell to an object to be coated after immersing a curved surface coating medium) and contacting a doctor with the surface while rotating to remove excess coating liquid other than the coating liquid in the cell. 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とし
てグラビア方式があるが、例えば特開平1−25705
0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 curved surface coating medium.
In Japanese Patent Publication No. 0, since the coating liquid in the pan is pumped by a curved coating medium, the coating liquid is easily scattered, and the scatter of the coating liquid contaminates a workpiece 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. Further, in the open-type coating liquid supply device, since the coating liquid supply unit is open, the solvent of the coating liquid is volatilized, resulting in deterioration of the coating liquid and deterioration of 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印刷版胴(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。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。
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 rotation of the printing plate cylinder (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. 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.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、これら
従来の塗布液供給装置は液排出口がチャンバードクター
本体に水平に設けられているため、チャンバードクター
内において発生してしまった泡や劣化又は汚濁してしま
った液の排出が速やかに行なわれないため、液流速を速
くできず、途中で乾燥、液劣化、汚濁を招き、転写の品
質が低下し易いという問題がある。また、洗浄時にも洗
浄液の速やかな排出ができないため、洗浄時間のロスに
つながるといった問題がある。
However, in these conventional coating liquid supply devices, since the liquid discharge port is provided horizontally in the chamber doctor main body, bubbles, deterioration or contamination generated in the chamber doctor are generated. Since the discharged liquid is not quickly discharged, the liquid flow rate cannot be increased, and drying, liquid deterioration, and turbidity are caused on the way, and there is a problem that the quality of transfer is easily deteriorated. In addition, since the cleaning liquid cannot be quickly discharged even during cleaning, there is a problem that the cleaning time is lost.

【0006】本発明の目的は、塗布液の排出が特別な手
段を用いることなく、自重のみで効率よく行なえ、さら
に塗布液流速を高め、発生した泡、劣化した液、汚濁し
た液の排出を速めて、途中乾燥を防ぎ、洗浄液等の排出
が速やかに行えるようにした塗布液供給装置を提供する
ことである。
An object of the present invention is to discharge a coating liquid efficiently by its own weight without using any special means, and to further increase the flow rate of the coating liquid to discharge generated bubbles, deteriorated liquid, and polluted liquid. It is an object of the present invention to provide a coating liquid supply device that can expedite drying, prevent drying during cleaning, and promptly discharge a cleaning liquid or the like.

【0007】[0007]

【課題を解決するための手段】本発明によれば、第一
に、曲面状塗工媒体液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及び
その曲面状塗工媒体に対向して配置された密閉型のドク
ターチャンバー内部に、塗布後の液の排出口に該液が自
由落下できる排出角度をもたせた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, firstly, in a coating liquid supply apparatus for supplying a coating liquid to a curved coating medium liquid, the coating liquid supply apparatus extends in the axial direction of the curved coating medium and the curved surface thereof. A coating liquid supply device, characterized in that a discharge angle at which the liquid can freely fall at a discharge port of the liquid after coating is provided inside a sealed doctor chamber disposed opposite to the coating medium. You.

【0008】第二に、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の塗布液供給装置が提供
される。
Second, the first coating liquid supply device is provided, 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. You.

【0009】第三に、前記排出口の排出角度が10°〜
80°であることを特徴とする上記第一又は第二の塗布
液供給装置が提供される。
Third, the discharge angle of the discharge port is 10 ° or more.
The first or second application liquid supply device described above, wherein the angle is 80 °.

【0010】第四に、前記排出口の断面積が供給口の断
面積よりも大きいことを特徴とする上記第一、第二又は
第三の塗布液供給装置が提供される。
Fourth, there is provided the first, second, or third coating liquid supply device, wherein the cross-sectional area of the discharge port is larger than the cross-sectional area of the supply port.

【0011】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の場合と、他に塗布
液を転写し塗工物を得る際の仲立ちとして使用する場合
とがある。曲面状塗工媒体は実質的には一般的な円筒素
材や印刷版胴のことであり、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" as used in the present invention refers to a medium to be coated and a final product, and a medium to be used as an intermediate when transferring a coating liquid to obtain a coated article. There is. The curved coating medium is substantially a general cylindrical material or printing plate cylinder, and specific examples of the printing plate cylinder include an intaglio roll such as a gravure roll. In particular, since the gravure roll usually has a print image portion engraved in a concave shape from the plate cylinder surface, as shown in the attached drawings, the doctor 3 is in contact with the gravure roll 1 (curved coating medium). There is no inconvenience. 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.

【0012】本発明によれば、塗布液の排出が特別な手
段を用いることなく速やかに行なわれる。
According to the present invention, the discharge of the coating liquid is promptly performed without using any special means.

【0013】[0013]

【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。また、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、14は塗布液である。そして図1は、曲面状塗工媒
体の軸方向にわたって曲面状塗工媒体の表面1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, and 14 denotes a coating liquid. FIG. 1 shows that the doctor 3 and the seal plate 4 and the surface 1 of the curved coating medium are provided inside a doctor chamber provided opposite to the surface 1 of the curved coating medium in the axial direction of the curved coating medium. The liquid level 7 exists between the contacts 5 and 6 of FIG. Due to the presence of the liquid level 7, the horizontal liquid level 7 itself is always equal to the atmospheric pressure, and the liquid pressure of the coating liquid, which is higher than the horizontal level, is slightly lower than the atmospheric pressure. Is prevented.

【0014】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。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、また塗布液の劣化がなくなり塗工むら
のような事態が阻止される。
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. 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 deteriorated. A situation like unevenness is prevented.

【0015】図2は液面7を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(図3)。
FIG. 2 shows an example in which a float type liquid level sensor 16 is provided to control the liquid level 7. 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. Further, 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 possible to apply a colored coating liquid which has a strong light absorption in the optical sensor and is difficult to detect. (Fig. 3).

【0016】図3はドクターチャンバー内にドクター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を確実に存在させること、および供
給側液流8と排出側液流9と強制的かつ完全に分離させ
るために、仕切板18を設けた例である。仕切板18
は、ドクター3とシールプレート4のほぼ中間であって
仕切板18の上端より下方に液面が維持されるように取
付けられるのが望ましい(図では上端)。仕切板18の
形状は湾曲した断面をもち、供給側液流8と排出側液流
9とが混ざらないようにしたものであればよく、上端に
行くほど曲面状塗工媒体の表面1に近接していること望
ましい。この仕切板18が設けられることにより、泡の
排出効果、供給側液流と排出側液流との混ざるのを防ぐ
効果、液劣化防止効果がより望ましいものになる。
FIG. 3 shows the doctor 3 in the doctor chamber.
And ensuring that the liquid surface 7 exists between the contact points 5 and 6 between the seal plate 4 and the surface 1 of the curved coating medium, and forcibly and completely separating the supply liquid flow 8 and the discharge liquid flow 9 from each other. This is an example in which a partition plate 18 is provided in order to perform this. Partition plate 18
Is desirably mounted substantially midway between the doctor 3 and the seal plate 4 so that the liquid level is maintained below the upper end of the partition plate 18 (the upper end in the figure). The shape of the partition plate 18 may be any shape as long as it has a curved cross section so that the supply-side liquid flow 8 and the discharge-side liquid flow 9 are not mixed. The closer to the upper end, the closer to the surface 1 of the curved coating medium. It is desirable to have. By providing the partition plate 18, the effect of discharging bubbles, the effect of preventing the supply-side liquid flow from mixing with the discharge-side liquid flow, and the effect of preventing liquid deterioration become more desirable.

【0017】また図3において、曲面状塗工媒体の表面
1と仕切板18との最短間隔(m)は0.1〜15[m
m]くらいが好ましい。m<0.1[mm]であると液
のくみ上げ量が不足する可能性があり、m>15[m
m]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との接触位置5の高さと、仕切
り板18の最高部との距離(n)は30[mm]以下に
設定することが好ましい。n>30[mm]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、塗布液の乾燥、固化、劣化が生
じてくる。
In FIG. 3, the shortest distance (m) between the surface 1 of the curved coating medium and the partition plate 18 is 0.1 to 15 [m].
m] is preferred. If m <0.1 [mm], the pumping amount of the liquid may be insufficient, and m> 15 [m
m], there is a possibility that some of the liquid scraped off by the doctor 3 will return to the liquid flow on the supply side again. Further, it is preferable that the distance (n) between the height of the contact position 5 between the doctor 3 and the surface 1 of the curved coating medium and the highest part of the partition plate 18 is set to 30 [mm] or less. When n> 30 [mm],
A stable coating liquid flow (coating liquid film above the horizontal plane) cannot be formed. Since the portion at the distance (n) is exposed to air, if the portion becomes longer, the solvent in the coating solution is more volatilized, and the coating solution is dried, solidified, and deteriorated.

【0018】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が
設けられていてもよい。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5〜20[mm]が適当であ
る。
FIG. 4 is a conceptual diagram of a side seal 15 provided on a side surface of the chamber doctor 2.
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 provided on 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, besides metals such as iron and aluminum, plastics, elastic materials such as sponge,
A material obtained by adding a conductive material to rubber or the like can also be used. The thickness of the side seal 15 is suitably 5 to 20 [mm].

【0019】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 poor due to being hard, and the curved coating medium is damaged. , Causing liquid leakage.

【0020】本発明に係るドクターチャンバー2は、図
1、図2及び図3に示したように、排出口11が液が自
由落下できる排出角度をもっているため、吸引手段が不
要で速く排出することができる。排出角度αは10°〜
80°が好ましい。10°より低いとチャンバー内に発
生した泡や劣化した液の排出がスムーズに行なわれず、
80°を超えると排出効率は良くなるが、排出液流の流
速が高くなりすぎ、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(A)を供給口10の
断面積(B)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。
In the doctor chamber 2 according to the present invention, as shown in FIGS. 1, 2 and 3, the discharge port 11 has a discharge angle at which the liquid can freely drop, so that the suction means is not required to discharge the liquid quickly. Can be. Discharge angle α is 10 ° ~
80 ° is preferred. If it is lower than 10 °, the bubbles generated in the chamber and the deteriorated liquid will not be discharged smoothly,
If the angle exceeds 80 °, the discharge efficiency is improved, but the flow rate of the discharged liquid flow becomes too high, and bubbles are generated in the liquid stock tank. Further, by making the cross-sectional area (A) of the discharge port 11 larger than the cross-sectional area (B) of the supply port 10, it is possible to achieve a structure that enhances discharge efficiency.

【0021】図5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
での掻取り後排出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. 5 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 coating liquid is lifted by the viscosity of the coating liquid and the wettability of the liquid with the curved coating medium, forming a flow of the coating liquid film. And is discharged from the outlet. 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 stagnation, and coating is performed with this. Here, by making the cross-sectional area of the outlet 11 larger than the cross-sectional area of the supply port 10, a space is created in the outlet, and bubbles generated here are released. The liquid can be cleaned by passing the separated discharge-side liquid flow through a filter or the like.

【0022】図6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6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、1個の方が
製造が容易である。
FIG. 6 is a rear view of the doctor chamber 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. 6, 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. .

【0023】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振動させながら、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振動させる
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、又は
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、前記の場合には、曲面状塗工媒体は
その表面に凹部が設けられているものの他、凹部が設け
られていないもの(ウエブ等)も必要に応じて用いられ
てよい。
The coating liquid is supplied to the surface 1 of the curved coating medium using the above-described apparatus. At this time, the coating liquid is supplied while the coating liquid supply device is vibrated in the axial direction of the curved coating medium. May be supplied. By vibrating the coating liquid supply device in the axial direction with respect to the surface 1 of the curved coating medium, the coating streaks generated by chipping or flaws of the doctor 3 are not concentrated at one place, and an apparently uniform formation ( (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 the curved coating medium and the impression cylinder. In this case, in addition to the curved surface coating medium having a concave portion on its surface, a medium without a concave portion (such as a web) may be used as necessary.

【0024】[0024]

【発明の効果】本発明によれば、塗布液の排出が特別な
手段を用いず、自重のみによって効率よく速やかに排出
でき、また塗布液流速を高め、泡、劣化、汚濁した液の
排出を速め、途中乾燥を防ぎ、洗浄液の排出を速やかに
行なうことができる。
According to the present invention, the coating liquid can be discharged efficiently and promptly only by its own weight without using any special means, and the flow rate of the coating liquid can be increased to reduce the discharge of bubbles, deterioration and polluted liquid. The washing liquid can be expedited, the drying on the way can be prevented, and the cleaning liquid can be discharged quickly.

【図面の簡単な説明】[Brief description of the drawings]

【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】図5(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。
5 (a), 5 (b) and 5 (c) are views for explaining a process from a standstill of the coating liquid supply device to operation thereof.

【図6】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における位置関係の一例を
示した図である。
FIG. 6 is a diagram showing an example of a positional relationship on the back surface of a coating liquid supply port and a coating liquid discharge port of a doctor chamber according to the present invention.

【符号の説明】[Explanation of symbols]

1 曲面状塗工媒体の表面 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 仕切板 Reference Signs List 1 Surface of curved coating medium 2 Doctor chamber structure 3 Doctor 4 Seal plate 5 Contact 6 Contact 7 Liquid surface 8 Supply-side liquid flow 9 Drain-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

───────────────────────────────────────────────────── フロントページの続き (72)発明者 日吉 好彦 東京都大田区中馬込1丁目3番6号 株式 会社リコー内 (72)発明者 大塚 典宏 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) 2C034 AA21 CA02 CA09 2C250 DB14 DB19 DB21 DC10 EA23 EB17 4F041 AA04 BA12 BA34 CA03 CA13 CA16 4F042 AA03 AA13 CB11 DH10  ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshihiko Hiyoshi 1-3-6 Nakamagome, Ota-ku, Tokyo Stock inside Ricoh Company (72) Inventor Norihiro Otsuka 1-3-6 Nakamagome, Ota-ku, Tokyo Stock F-term in Ricoh Company (reference) 2C034 AA21 CA02 CA09 2C250 DB14 DB19 DB21 DC10 EA23 EB17 4F041 AA04 BA12 BA34 CA03 CA13 CA16 4F042 AA03 AA13 CB11 DH10

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 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
って及びその曲面状塗工媒体に対向して配置された密閉
型のドクターチャンバー内部に、塗布後の液の排出口に
該液が自由落下できる排出角度をもたせたことを特徴と
する塗布液供給装置。
1. A closed type doctor arranged in a coating liquid supply apparatus for supplying a coating liquid to a curved coating medium, the doctor being disposed in an axial direction of the curved coating medium and opposed to the curved coating medium. A coating liquid supply device, wherein a discharge angle at which the liquid can freely fall into a discharge port of the liquid after application is provided inside the chamber.
【請求項2】 曲面状塗工媒体が凹部を有する印刷版胴
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記載の塗布液供給装置。
2. 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.
【請求項3】 排出口の排出角度が10°〜80°であ
ることを特徴とする請求項1又は2記載の塗布液供給装
置。
3. The coating liquid supply device according to claim 1, wherein a discharge angle of the discharge port is 10 ° to 80 °.
【請求項4】 排出口の断面積が供給口の断面積よりも
大きい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 a cross-sectional area of the discharge port is larger than a cross-sectional area of the supply port.
JP29366398A 1998-10-15 1998-10-15 Coating liquid supplying apparatus Pending JP2000117945A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29366398A JP2000117945A (en) 1998-10-15 1998-10-15 Coating liquid supplying apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29366398A JP2000117945A (en) 1998-10-15 1998-10-15 Coating liquid supplying apparatus

Publications (1)

Publication Number Publication Date
JP2000117945A true JP2000117945A (en) 2000-04-25

Family

ID=17797648

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29366398A Pending JP2000117945A (en) 1998-10-15 1998-10-15 Coating liquid supplying apparatus

Country Status (1)

Country Link
JP (1) JP2000117945A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017087169A (en) * 2015-11-13 2017-05-25 富士機械工業株式会社 Coating device
CN111531960A (en) * 2020-05-11 2020-08-14 胡俊好 Method for preparing and processing composite bag for reducing dirty printing through negative pressure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017087169A (en) * 2015-11-13 2017-05-25 富士機械工業株式会社 Coating device
CN111531960A (en) * 2020-05-11 2020-08-14 胡俊好 Method for preparing and processing composite bag for reducing dirty printing through negative pressure

Similar Documents

Publication Publication Date Title
JPH07101041A (en) Anilox coater with brush
JP5879929B2 (en) Treatment liquid coating apparatus for inkjet printer, operating method of the coating apparatus, and image forming system
JP5202663B2 (en) Matting agent coating apparatus and inkjet recording apparatus
JP2010000777A (en) Image forming apparatus, and foam application apparatus
CN1654209A (en) Liquid applying apparatus and ink jet printing apparatus
JP5321026B2 (en) Image forming device, foam coating device
JP2000117942A (en) Method and apparatus for feed of application liquid
JP2000117945A (en) Coating liquid supplying apparatus
JP2001079468A (en) Roller coating apparatus
JP5359368B2 (en) Image forming device, foam coating device
JP2000117943A (en) Coating liquid supplying apparatus
JP2001199050A (en) Method and apparatus for supplying coating liquid
JP2000117944A (en) Coating liquid supplying apparatus
JP2003236428A (en) Gravure coating apparatus
JPS63158252A (en) Dampening method and arrangement of offset press
JP5188265B2 (en) Hydraulic transfer device
JP2007069125A (en) Apparatus and method for coating
JP2005211702A (en) Coating liquid supplying apparatus
JP2000084453A (en) Apparatus for supplying coating liquid to plate cylinder
JP3728453B2 (en) Gravure coating equipment
JP2007196098A (en) Multilayer coating method
JP2019018408A (en) Liquid discharge device and liquid discharge method
JP5479386B2 (en) Matting agent coating apparatus and inkjet recording apparatus
JP2011173067A (en) Image forming apparatus and treatment liquid applicator
JPH09234851A (en) Two-blade doctor for gravure printing machine and printing machine

Legal Events

Date Code Title Description
RD01 Notification of change of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7421

Effective date: 20040122

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20050527

A131 Notification of reasons for refusal

Effective date: 20050601

Free format text: JAPANESE INTERMEDIATE CODE: A131

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050801

A131 Notification of reasons for refusal

Effective date: 20060314

Free format text: JAPANESE INTERMEDIATE CODE: A131

A521 Written amendment

Effective date: 20060515

Free format text: JAPANESE INTERMEDIATE CODE: A523

A02 Decision of refusal

Effective date: 20060912

Free format text: JAPANESE INTERMEDIATE CODE: A02