JP2009172861A - Coating liquid feeder - Google Patents

Coating liquid feeder Download PDF

Info

Publication number
JP2009172861A
JP2009172861A JP2008013569A JP2008013569A JP2009172861A JP 2009172861 A JP2009172861 A JP 2009172861A JP 2008013569 A JP2008013569 A JP 2008013569A JP 2008013569 A JP2008013569 A JP 2008013569A JP 2009172861 A JP2009172861 A JP 2009172861A
Authority
JP
Japan
Prior art keywords
coating liquid
chamber
coating
liquid supply
excess
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
JP2008013569A
Other languages
Japanese (ja)
Inventor
Kazuhiro Suematsu
和宏 末松
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.)
Toppan Inc
Original Assignee
Toppan Printing 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 Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP2008013569A priority Critical patent/JP2009172861A/en
Publication of JP2009172861A publication Critical patent/JP2009172861A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively provide a coating liquid feeder, which is capable of preventing coating defect due to an excess or shortage of coating liquid inside a chamber, only with a mechanism without using electric equipment, in the coating liquid feeder in a gravure printing press and a coating apparatus. <P>SOLUTION: This is a coating liquid feeder installed on the circumferential surface of a gravure plate cylinder. The coating liquid feeder is characterized in that it has the coating liquid chamber comprising a seal plate for sealing the upstream side in the rotary direction of the circumferential surface, a doctor blade for sealing the downstream side and scraping off excess ink on the plate cylinder face, and a side seal for sealing the side end part, and that the coating liquid chamber has the coating liquid supply port and the coating liquid draining port, including the coating liquid circulation/supply mechanism by an ejector which makes a supply coating liquid into a driving fluid and a drain liquid into a fluid to be driven, and an effluent mechanism which discharges an excess coating liquid in accordance with a pressure inside the coating liquid chamber. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、グラビア印刷機またはグラビアコーターのグラビア版胴にインクや塗工液を供給する塗液供給装置に関するものであり、特に、ドクターブレードを備えたチャンバー型塗液供給装置に関する。   The present invention relates to a coating liquid supply apparatus that supplies ink or a coating liquid to a gravure plate cylinder of a gravure printing machine or gravure coater, and more particularly to a chamber type coating liquid supply apparatus having a doctor blade.

チャンバー型塗液供給装置に関しては、特許文献1および特許文献2によって提案されている。
特許文献1に開示されたインク供給装置では、印刷版胴に沿って配置されたインクチャンバーと、このインクチャンバーにインクを供給するインクポンプとを備え、上記インクチャンバーに、印刷版胴の版面に対向するインク溜まりを形成すると共に、その回転方向の下流側部をシールし、かつ印刷版胴の版面に付着した不要なインクを除去するドクター刃と、回転方向の上流側部をシールするシールプレートと、上記インク溜まりの側端部とを設け、インクの飛散や洗浄剤の揮発等に起因した環境の悪化を抑制することができるとともに、印刷不良の発生を効果的に防止することが出来、かつインクの使用量を必要最小限に抑えるとしている。
The chamber-type coating liquid supply device is proposed by Patent Document 1 and Patent Document 2.
The ink supply device disclosed in Patent Document 1 includes an ink chamber disposed along a printing plate cylinder, and an ink pump that supplies ink to the ink chamber. The ink chamber includes a plate surface of the printing plate cylinder. A doctor plate that forms an opposing ink reservoir, seals the downstream side in the rotation direction, and removes unnecessary ink adhering to the plate surface of the printing plate cylinder, and a seal plate that seals the upstream side in the rotation direction And the side end of the ink reservoir, it is possible to suppress the deterioration of the environment due to the scattering of the ink and the volatilization of the cleaning agent, it is possible to effectively prevent the occurrence of printing defects, At the same time, the amount of ink used is minimized.

特許文献2に開示されたグラビア塗工装置は、グラビア塗工を行なうグラビアロールの外方に、塗工液の液溜め部を有したチャンバーを配するグラビア塗工装置において、前記液溜め部に塗工液を圧送するポンプと、前記液溜め部から塗工液を排出する排出経路と、前記排出経路の途中に設けられ、その開度によって排出する塗工液の量を制御する検出手段と、前記ポンプの圧送量、または、前記バルブの開度を制御して、前記圧力検出手段で検出した圧力検出値が設定圧力値になるようにフィードバック制御する制御手段、を有することを特徴とするグラビア塗工装置であり、圧力検出手段の圧力検出値により、ポンプの圧送量、または、バルブの開度を制御して、液溜め部とグラビアロールに囲まれた閉塞空間の内圧の圧力検出値が設定値になるようにフィードバックするとしている。   The gravure coating apparatus disclosed in Patent Document 2 is a gravure coating apparatus in which a chamber having a liquid reservoir for a coating liquid is disposed outside a gravure roll that performs gravure coating. A pump that pumps the coating liquid; a discharge path that discharges the coating liquid from the liquid reservoir; and a detection unit that is provided in the middle of the discharge path and controls the amount of the coating liquid that is discharged depending on the opening degree. And control means for controlling the pumping amount of the pump or the opening of the valve to perform feedback control so that the detected pressure value detected by the pressure detecting means becomes a set pressure value. This is a gravure coating device, and the pressure detection value of the internal pressure in the enclosed space surrounded by the liquid reservoir and the gravure roll is controlled by the pressure detection value of the pressure detection means, controlling the pumping amount or the valve opening degree. Set Trying to feedback to be.

以下に、特許文献1および特許文献2に開示された塗液供給装置の問題点を挙げる。
特許文献1に示されるインク供給装置では、印刷速度の変化に伴って、インク消費量が変動した場合に、インクチャンバー内のインク量を一定に保つための機構がないため、実際の印刷機においては、安定した印刷や塗工ができないという問題がある。
The problems of the coating liquid supply apparatus disclosed in Patent Document 1 and Patent Document 2 are listed below.
In the ink supply device disclosed in Patent Document 1, there is no mechanism for keeping the amount of ink in the ink chamber constant when the ink consumption varies as the printing speed changes. However, there is a problem that stable printing and coating cannot be performed.

特許文献2に示される塗液供給装置では、チャンバー内部の圧力検出値の変動が小さい場合にはポンプの圧送量を調整して設定圧力範囲に入るようにし、圧力検出値の変動が大きい場合には排出側に設けられたバルブの開度の制御も併用することで、液漏れや塗工抜けを防ぐとしている。   In the coating liquid supply apparatus shown in Patent Document 2, when the variation in the pressure detection value inside the chamber is small, the pumping amount of the pump is adjusted so that it falls within the set pressure range, and when the variation in the pressure detection value is large. Uses the control of the degree of opening of the valve provided on the discharge side to prevent liquid leakage and coating omission.

また、この塗液供給装置では、チャンバー内部圧力が設定圧力よりも大きく下がった場合、排出配管に設けられたバルブを閉じるとしている。それにより、ポンプからの送液と相まって、チャンバー内圧力が高まるとしている。しかし、排出配管のバルブを閉じてしまうことで、配管内に空気が残り、排出配管内に塗液は流れることができず、チャンバー内に送り込まれた塗液は行き場を失ってチャンバー内部の圧力が高まり、結果としてドクターおよびシール材の隙間から液漏れが発生することになる。   Moreover, in this coating liquid supply apparatus, the valve provided in the discharge pipe is closed when the pressure inside the chamber is greatly lower than the set pressure. Thereby, it is said that the pressure in the chamber increases in combination with the liquid feeding from the pump. However, if the valve of the discharge pipe is closed, air remains in the pipe, and the coating liquid cannot flow in the discharge pipe, and the coating liquid sent into the chamber loses its place and the pressure inside the chamber As a result, liquid leakage occurs from the gap between the doctor and the sealing material.

また、チャンバー型塗液供給装置は可燃性ガス・引火性の液体を扱う場所での使用が多いと考えられるが、上記圧力検出手段に電気部品を使用する場合、安全のために防爆認定品を使わねばならず、フィードバック回路と併せて、設備として大変高価になってしまう
問題がある。
In addition, it is thought that chamber type coating liquid supply devices are often used in places where flammable gases and flammable liquids are handled. However, if electrical parts are used for the pressure detection means, explosion-proof certified products should be used for safety. In addition to the feedback circuit, there is a problem that the equipment becomes very expensive.

また、塗液を途切れさせることなくチャンバー内をスムーズに流すためには、塗液排出口周辺を弱負圧にする必要がある。これは、塗液排出配管にポンプを設け、強制的に液を排出することでも達成されるが、供給ポンプの送液量と、基材に転写され消費される塗液量と、排出ポンプの送液量とをバランスさせることが難しく、調整を困難にすることから望ましくない。
特開平8-58069号公報 特開2004-313955号公報
Further, in order to smoothly flow the inside of the chamber without interrupting the coating liquid, it is necessary to make a weak negative pressure around the coating liquid discharge port. This can also be achieved by providing a pump in the coating liquid discharge piping and forcibly discharging the liquid. However, the amount of liquid supplied by the supply pump, the amount of coating liquid transferred to the substrate and consumed, This is not desirable because it is difficult to balance the amount of liquid to be fed and adjustment is difficult.
JP-A-8-58069 JP 2004-313955 A

本発明は、かかる従来技術の問題点を解決するものであり、その課題とするところは、グラビア方式の印刷機およびコーティング装置における塗液供給装置において、チャンバー内塗液の過不足による塗工不良を防止することが可能な塗液供給装置を、電気設備を使用せずに機構のみによって安価に提供することである。   The present invention solves such problems of the prior art, and the problem is that in a coating liquid supply apparatus in a gravure type printing machine and coating apparatus, coating failure due to excessive or insufficient coating liquid in the chamber It is to provide a coating liquid supply apparatus capable of preventing the above at a low cost only by a mechanism without using electric equipment.

上記問題点を解決するための手段として、請求項1に係る発明は、グラビア版胴の円周面上に設置される塗液供給装置であって、該円周面の回転方向の上流側をシールするシールプレートと、下流側をシールし、版胴面の余分なインキを掻き取るドクターブレードと、側端部をシールするサイドシールとによって形成される塗液チャンバーを有し、該塗液チャンバーは、塗液供給口と塗液排出口を備えており、供給塗液を駆動流体とし、排出塗液を被駆動流体とするエジェクターによる塗液循環供給機構と、塗液チャンバー内部圧力に応じて、余剰塗液を排出する排液機構を有することを特徴とする、塗液供給装置である。   As means for solving the above-mentioned problems, the invention according to claim 1 is a coating liquid supply device installed on the circumferential surface of the gravure plate cylinder, the upstream side in the rotational direction of the circumferential surface. A coating plate chamber formed by a seal plate for sealing, a doctor blade that seals the downstream side and scrapes off excess ink on the plate cylinder surface, and a side seal that seals the side edges; and the coating solution chamber Is equipped with a coating liquid supply port and a coating liquid discharge port, depending on the coating liquid circulation supply mechanism by an ejector using the supplied coating liquid as a driving fluid and the discharged coating liquid as a driven fluid, and the internal pressure of the coating liquid chamber A coating liquid supply apparatus having a drainage mechanism for discharging excess coating liquid.

また請求項2に係る発明は、前記塗液排出口に連設した塗液排出配管にエアベント機構を有することを特徴とする請求項1に記載の塗液供給装置である。   The invention according to claim 2 is the coating liquid supply apparatus according to claim 1, wherein an air vent mechanism is provided in the coating liquid discharge pipe connected to the coating liquid discharge port.

また請求項3に係る発明は、塗液チャンバー内部圧力に応じて余剰塗液を排出する排液機構を複数有することを特徴とする請求項1または2に記載の塗液供給装置である。   The invention according to claim 3 is the coating liquid supply apparatus according to claim 1 or 2, further comprising a plurality of drainage mechanisms for discharging excess coating liquid according to the internal pressure of the coating liquid chamber.

また請求項4に係る発明は、塗液チャンバー内の塗液供給口と塗液排出口の間に、チャンバー内隔壁を配置したことを特徴とする請求項1〜3のいずれか1項に記載の塗液供給装置である。   The invention according to claim 4 is characterized in that a partition in the chamber is disposed between the coating liquid supply port and the coating liquid discharge port in the coating liquid chamber. The coating liquid supply apparatus.

本発明は以上の構成であるから、下記に示す如き効果がある。即ち、塗液チャンバーは、シールプレート、ドクターブレード、サイドシール、塗液供給装置に対向する版胴円周面により略密室を形成し、略密室内に塗液を保持することから、塗液に含まれる有機溶剤等揮発成分の大気中への放散が少なく、塗液の粘度変化も少ないため、安定した印刷塗工品質が得られる。またこのことは、労働環境面ならびに地球環境面における効果も大きい。   Since this invention is the above structure, there exist the following effects. That is, the coating liquid chamber forms a substantially closed chamber by the plate cylinder circumferential surface facing the seal plate, doctor blade, side seal, and coating liquid supply device, and holds the coating liquid in the substantially sealed chamber. Since volatile components such as organic solvents contained are less diffused into the atmosphere, and the viscosity change of the coating liquid is small, stable printing coating quality can be obtained. This also has a significant effect on the work environment and the global environment.

供給塗液を駆動流体とし、排出塗液を被駆動流体とするエジェクターによって動作する塗液循環供給機構を有することで塗液排出口周辺部を負圧とし、円滑な塗液の循環と、補充がなされる。また、チャンバー内部圧力に応じて余剰塗液を排出する排液機構を有することで、塗液循環量を自動的に適切に調整し、塗工液の過不足による印刷塗工不良を防止することが可能である。
また上記機構は従来用いられていた圧力センサーや電磁バルブ等の電気部品を使用せずに構成したので、コスト面、安全面でも優れたものである。
By having a coating liquid circulation supply mechanism that is operated by an ejector that uses the supplied coating liquid as the driving fluid and the discharged coating liquid as the driven fluid, negative pressure is applied to the periphery of the coating liquid discharge port, allowing smooth circulation and replenishment of the coating liquid Is made. In addition, by having a drainage mechanism that discharges excess coating liquid according to the internal pressure of the chamber, the coating liquid circulation amount is automatically adjusted appropriately to prevent printing coating defects due to excessive or insufficient coating liquid. Is possible.
In addition, the above mechanism is configured without using electric parts such as a pressure sensor and an electromagnetic valve which have been used conventionally, so that it is excellent in terms of cost and safety.

本発明の塗液供給装置において、塗液排出口に連設した塗液排出配管にエアベント機構を設けた場合には、特に塗液の循環を開始した初期段階において、従来煩雑であった循環経路内の空気抜き作業を極めて容易に為し得る。   In the coating liquid supply apparatus of the present invention, when the air vent mechanism is provided in the coating liquid discharge pipe connected to the coating liquid discharge port, the circulation path that has been complicated in the past, particularly at the initial stage when the circulation of the coating liquid is started. The inside air can be removed very easily.

また、塗液チャンバーの内部圧力に応じて余剰塗液を排出する排液機構を複数設けた場合には、余剰塗液の排出が平均化されるため、局部的な塗液の不足による印刷塗工むら等の発生を防止する効果がある。   In addition, when a plurality of drainage mechanisms are provided to discharge the surplus coating liquid according to the internal pressure of the coating liquid chamber, the discharge of the surplus coating liquid is averaged. There is an effect of preventing the occurrence of unevenness of work.

また塗液チャンバー内に塗液供給口部分と塗液排出口部分とを分けるチャンバー内隔壁を設けた場合には、塗液供給口側は弱正圧、塗液排出口側は弱負圧に分ける効果をさらに高めることができる。   If a partition in the chamber that separates the coating liquid supply port part and the coating liquid discharge port part is provided in the coating liquid chamber, the coating liquid supply port side has a weak positive pressure and the coating liquid discharge port side has a weak negative pressure. The effect of dividing can be further enhanced.

以下、本発明に係る塗液供給装置の実施の形態について図面を用いて説明する。
図1は、本発明に係る塗液供給装置の実施例を示す断面模式図である。
本発明の塗液供給装置は、回転する円柱体であるグラビア版胴18の円周面上の塗液転移部の直前に設置され、円周面の回転方向の上流側から順にシールプレート押さえ板3、シールプレート2、塗液供給口6および塗液排出口7を備える塗液チャンバー1、ドクター押さえ板5、ドクターブレード4を有し、側面にはサイドシール、サイドシール押さえ板を備えており、前記シールプレート2とドクターブレード4とサイドシールによって、塗液チャンバー1を形成している。供給塗液を駆動流体とし、排出塗液を被駆動流体とするエジェクター16によって動作する塗液循環供給機構を有し、また、チャンバー内部圧力に応じて自動的に液を排出する排液機構10を有している。
Embodiments of a coating liquid supply apparatus according to the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing an embodiment of a coating liquid supply apparatus according to the present invention.
The coating liquid supply apparatus of the present invention is installed immediately before the coating liquid transfer portion on the circumferential surface of the gravure plate cylinder 18 which is a rotating cylindrical body, and in order from the upstream side in the rotation direction of the circumferential surface, the seal plate presser plate 3. It has a coating liquid chamber 1 provided with a seal plate 2, a coating liquid supply port 6 and a coating liquid discharge port 7, a doctor pressing plate 5, and a doctor blade 4, with side seals and side seal pressing plates on the side surfaces. The coating liquid chamber 1 is formed by the seal plate 2, the doctor blade 4 and the side seal. It has a coating liquid circulation supply mechanism that is operated by an ejector 16 that uses the supplied coating liquid as the driving fluid and the discharged coating liquid as the driven fluid, and also drains the liquid automatically according to the pressure inside the chamber. have.

本発明の塗液供給装置では、シールプレート2、ドクターブレード4、サイドシール、塗液供給装置に対向する版胴版面により略密室を形成し、略密室内に塗液を保持することでグラビア版胴18が該密室部分を通過するときにグラビア版胴セル内に塗液を充填し、ドクターブレード4によりグラビア版胴に付着した余分な塗液を掻き落とす。   In the coating liquid supply apparatus of the present invention, a gravure plate is formed by forming a substantially closed chamber by the plate plate surface facing the seal plate 2, the doctor blade 4, the side seal, and the coating liquid supply apparatus, and holding the coating liquid in the substantially sealed chamber. When the cylinder 18 passes through the closed chamber portion, the gravure plate cylinder cell is filled with the coating liquid, and the doctor blade 4 scrapes off the excess coating liquid adhering to the gravure plate cylinder.

塗液循環を開始すると、塗液タンク8から送液ポンプ9によって圧送された塗液が塗液吐出ノズル16aから噴出する。このとき、塗液排出配管7aが塗液吐出ノズル16aを覆うように連通されたエジェクター16では、ベンチュリー効果により吐出された供給塗液が排出配管内流体を巻き込み吸引し、排出配管内が弱負圧状態となる。排出配管は塗液チャンバー1に繋がっているため、結局、塗液排出口7周辺部は塗液供給口6周辺部よりも負圧となり、この圧力差によって塗液チャンバー1内を塗液がスムーズに流れ、循環する。なお送液ポンプ9と塗液タンク8は、塗液供給装置から距離を離して設置することもできる。   When the coating liquid circulation is started, the coating liquid pumped from the coating liquid tank 8 by the liquid feeding pump 9 is ejected from the coating liquid discharge nozzle 16a. At this time, in the ejector 16 connected so that the coating liquid discharge pipe 7a covers the coating liquid discharge nozzle 16a, the supply coating liquid discharged by the venturi effect entrains and sucks the fluid in the discharge pipe, and the inside of the discharge pipe is weakly negative. Pressure state. Since the discharge pipe is connected to the coating liquid chamber 1, the peripheral part of the coating liquid discharge port 7 eventually becomes a negative pressure than the peripheral part of the coating liquid supply port 6, and the coating liquid is smooth in the coating liquid chamber 1 due to this pressure difference. Flows and circulates. The liquid feed pump 9 and the coating liquid tank 8 can also be installed at a distance from the coating liquid supply device.

エジェクター部の塗液排出配管7a側で発生する負圧は、塗液供給量に応じて変化する。このことから、塗工速度を速めた場合に、塗液消費量が増えると、自動的に塗液供給量が増えて負圧の効果が増大し、作業者がいちいち調整する必要が無い。   The negative pressure generated at the coating liquid discharge pipe 7a side of the ejector section changes according to the coating liquid supply amount. Therefore, when the coating speed is increased, if the coating liquid consumption increases, the coating liquid supply amount automatically increases and the negative pressure effect increases, and the operator does not need to adjust each time.

また、塗液排出配管7a経路内にエアベント機構14を設けることで、塗液循環開始時に、塗液チャンバー1および配管内に残存する空気を迅速に抜くことができ、上記効果と相まって循環開始時に起こりやすいチャンバーからの液漏れを防ぐことができる。エアベント機構の構造および動作の一例を図2および図3に示す。エアベント機構14は液経路とフロート15により構成され、図2のように液が流れてくるまでの間はフロートが自重
により送液口を塞ぎ、排気口が開いているために空気19が抜けていく。液が流れ始めると、浮力によりフロートが浮き、排気口を塞いで送液口が開くため、塗液20は送液口から流れていく。
Also, by providing the air vent mechanism 14 in the coating liquid discharge pipe 7a path, the air remaining in the coating liquid chamber 1 and the pipe can be quickly removed at the start of the coating liquid circulation. Liquid leakage from the chamber, which is likely to occur, can be prevented. An example of the structure and operation of the air vent mechanism is shown in FIGS. The air vent mechanism 14 is composed of a liquid path and a float 15, and as shown in FIG. 2, until the liquid flows, the float closes the liquid feeding port by its own weight, and the air 19 is released because the exhaust port is open. Go. When the liquid begins to flow, the float floats due to buoyancy, closes the exhaust port and opens the liquid feed port, and thus the coating solution 20 flows from the liquid feed port.

グラビア版胴セル内に塗液を充填する際には、塗液供給部内圧が高い方がセル内に塗液が入りやすく、また、セル内に残留した塗液の再溶解の面でも有利である。しかし、供給部圧力が高すぎる場合には、ドクターと版胴面、またはサイドシールと版胴面との隙間から塗液が漏れ出し、塗工が不安定になる。この問題を解決するため、本発明では塗液チャンバー内部圧力に応じて自動的に塗液を排出する排液機構10を備えている。   When filling a gravure plate cylinder cell with a coating solution, the higher the coating solution supply pressure, the easier it is for the coating solution to enter the cell, and it is also advantageous in terms of redissolving the coating solution remaining in the cell. is there. However, when the supply section pressure is too high, the coating liquid leaks from the gap between the doctor and the plate cylinder surface, or the side seal and the plate cylinder surface, and the coating becomes unstable. In order to solve this problem, the present invention includes a drainage mechanism 10 that automatically discharges the coating liquid in accordance with the internal pressure of the coating liquid chamber.

塗液チャンバー内部圧力に応じて液を排出する排液機構10の構造および動作を示す一例を、図4および図5に示す。受圧部11、プランジャー12、排液経路13により構成される弁構造で、塗液チャンバー内圧力がプランジャーによる押付力と釣り合いが保たれている場合には、図4のように弁は閉じている。しかし、塗液チャンバー内部圧力が高まって、プランジャー12による押付力を上回った場合には図5のように受圧部11が押し下げられて弁が開き、余剰塗液21が排液配管13から排出される。この余剰塗液21は塗液タンク8に回収され、再利用される。また、ねじ込み式のプランジャーを用いることにより、プランジャー12を締めこんだり緩めたりして進退させ、塗液チャンバー内圧力に対抗する受圧部押付力を調整することが出来る。   An example showing the structure and operation of the drainage mechanism 10 that discharges the liquid in accordance with the internal pressure of the coating liquid chamber is shown in FIGS. When the pressure in the coating liquid chamber is balanced with the pressing force by the plunger in the valve structure constituted by the pressure receiving portion 11, the plunger 12, and the drainage path 13, the valve is closed as shown in FIG. ing. However, when the internal pressure of the coating liquid chamber increases and exceeds the pressing force of the plunger 12, the pressure receiving portion 11 is pushed down to open the valve as shown in FIG. 5, and the excess coating liquid 21 is discharged from the drainage pipe 13. Is done. The surplus coating liquid 21 is collected in the coating liquid tank 8 and reused. Further, by using a screw-in type plunger, the plunger 12 can be advanced or retracted by tightening or loosening, and the pressure receiving portion pressing force against the pressure in the coating liquid chamber can be adjusted.

また、この排液機構10は塗液チャンバー1の巾方向に複数個取り付けることも可能である。排液機構10を複数個取り付けることにより、特に塗液の粘度が高く、流動性が少ない場合等には、余剰塗液20の排出が平均化されるため、局部的な塗液の不足による印刷塗工むら等の発生を防止する効果がある。   A plurality of the drainage mechanisms 10 can be attached in the width direction of the coating liquid chamber 1. By attaching a plurality of drainage mechanisms 10, especially when the viscosity of the coating liquid is high and the fluidity is low, the discharge of the excess coating liquid 20 is averaged, so printing due to a local lack of coating liquid This has the effect of preventing uneven coating.

塗液供給量が多めになり、塗液チャンバー内部圧力が高くなったとしても、本発明による排液機構10により、過剰な塗液は排出され回収できるため、液漏れが起こる心配が無い。塗液供給量が多くなるほどベンチュリー効果により塗液排出口付近が負圧になる効果と合わせ、高速塗工時にも液漏れの心配をすることなく、塗工を行なうことができる。   Even if the supply amount of the coating liquid increases and the internal pressure of the coating liquid chamber increases, the liquid draining mechanism 10 according to the present invention allows the excessive coating liquid to be discharged and collected, so that there is no fear of liquid leakage. Along with the effect that the vicinity of the coating liquid discharge port becomes negative due to the venturi effect as the coating liquid supply amount increases, coating can be performed without worrying about liquid leakage even during high-speed coating.

本発明では、塗液チャンバー内1に適切なチャンバー内隔壁17を設け、塗液供給口6側は弱正圧、塗液排出口7側は弱負圧に分けることで、上記効果を一層高めることも可能である。チャンバー内隔壁17は、低粘度塗液の場合はグラビア版胴との隙間をせまく、高粘度塗液の場合には隙間を広くすると良い。   In the present invention, an appropriate chamber inner partition wall 17 is provided in the coating liquid chamber 1, and the above effect is further enhanced by dividing the coating liquid supply port 6 side into a weak positive pressure and the coating liquid discharge port 7 side into a weak negative pressure. It is also possible. In the case of a low-viscosity coating liquid, the chamber inner partition wall 17 may have a gap with the gravure plate cylinder, and in the case of a high-viscosity coating liquid, the gap may be widened.

また、本発明は、機械的な作用により上記すべての効果を得るため、高価な防爆仕様の電気部品等は必要とされない。   In addition, since the present invention obtains all the above effects by mechanical action, an expensive explosion-proof electrical component or the like is not required.

本発明に係る塗液供給装置の実施例を示す断面模式図である。It is a cross-sectional schematic diagram which shows the Example of the coating liquid supply apparatus which concerns on this invention. 本発明に係るエアベント機構の構造および動作を示す断面説明図である。It is a section explanatory view showing structure and operation of an air vent mechanism concerning the present invention. 本発明に係るエアベント機構の構造および動作を示す断面説明図である。It is a section explanatory view showing structure and operation of an air vent mechanism concerning the present invention. 本発明に係る塗液排出機構の構造および動作を示す断面説明図である。It is a section explanatory view showing structure and operation of a coating liquid discharge mechanism concerning the present invention. 本発明に係る塗液排出機構の構造および動作を示す断面説明図である。It is a section explanatory view showing structure and operation of a coating liquid discharge mechanism concerning the present invention.

符号の説明Explanation of symbols

1・・・・塗液チャンバー
2・・・・シールプレート
3・・・・シールプレート押さえ板
4・・・・ドクターブレード
5・・・・ドクター押さえ板
6・・・・塗液供給口
6a・・・塗液供給配管
7・・・・塗液排出口
7a・・・塗液排出配管
8・・・・塗液タンク
9・・・・送液ポンプ
10・・・排液機構
11・・・受圧部
12・・・プランジャー
13・・・排液配管
14・・・エアベント機構
15・・・フロート
16・・・エジェクター
16a・・塗液吐出ノズル
17・・・チャンバー内隔壁
18・・・グラビア版胴
19・・・循環経路内の空気
20・・・循環塗液
21・・・余剰塗液
DESCRIPTION OF SYMBOLS 1 ... Coating liquid chamber 2 ... Seal plate 3 ... Seal plate pressing plate 4 ... Doctor blade 5 ... Doctor pressing plate 6 ... Coating liquid supply port 6a ... ································································································································································ Pressure receiving part 12 ... Plunger 13 ... Drainage pipe 14 ... Air vent mechanism 15 ... Float 16 ... Ejector 16a ... Coating liquid discharge nozzle 17 ... Chamber partition 18 ... Gravure Plate cylinder 19 ... Air 20 in circulation path ... Circulating coating liquid 21 ... Excess coating liquid

Claims (4)

グラビア版胴の円周面上に設置される塗液供給装置であって、該円周面の回転方向の上流側をシールするシールプレートと、下流側をシールし、版胴面の余分なインキを掻き取るドクターブレードと、側端部をシールするサイドシールとによって形成される塗液チャンバーを有し、該塗液チャンバーは、塗液供給口と塗液排出口を備えており、供給塗液を駆動流体とし、排出塗液を被駆動流体とするエジェクターによる塗液循環供給機構と、塗液チャンバー内部圧力に応じて、余剰塗液を排出する排液機構を有することを特徴とする、塗液供給装置。   A coating liquid supply device installed on the circumferential surface of a gravure plate cylinder, which seals the upstream side in the rotational direction of the circumferential surface, and seals the downstream side to remove excess ink on the plate cylinder surface A coating liquid chamber formed by a doctor blade that scrapes off and a side seal that seals the side end, the coating liquid chamber having a coating liquid supply port and a coating liquid discharge port, A coating fluid circulation and supply mechanism by an ejector that uses the discharged coating liquid as a driven fluid, and a drainage mechanism that discharges excess coating liquid according to the internal pressure of the coating liquid chamber. Liquid supply device. 前記塗液排出口に連設した塗液排出配管にエアベント機構を有することを特徴とする請求項1に記載の塗液供給装置。   The coating liquid supply apparatus according to claim 1, wherein an air vent mechanism is provided in a coating liquid discharge pipe provided continuously with the coating liquid discharge port. 塗液チャンバー内部圧力に応じて余剰塗液を排出する排液機構を複数有することを特徴とする請求項1または2に記載の塗液供給装置。   The coating liquid supply apparatus according to claim 1, further comprising a plurality of drainage mechanisms that discharge excess coating liquid in accordance with the internal pressure of the coating liquid chamber. 塗液チャンバー内の塗液供給口と塗液排出口の間に、チャンバー内隔壁を配置したことを特徴とする請求項1〜3のいずれか1項に記載の塗液供給装置。   The coating liquid supply apparatus according to any one of claims 1 to 3, wherein a partition in the chamber is disposed between the coating liquid supply port and the coating liquid discharge port in the coating liquid chamber.
JP2008013569A 2008-01-24 2008-01-24 Coating liquid feeder Pending JP2009172861A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008013569A JP2009172861A (en) 2008-01-24 2008-01-24 Coating liquid feeder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008013569A JP2009172861A (en) 2008-01-24 2008-01-24 Coating liquid feeder

Publications (1)

Publication Number Publication Date
JP2009172861A true JP2009172861A (en) 2009-08-06

Family

ID=41028521

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008013569A Pending JP2009172861A (en) 2008-01-24 2008-01-24 Coating liquid feeder

Country Status (1)

Country Link
JP (1) JP2009172861A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012239976A (en) * 2011-05-19 2012-12-10 Fuji Kikai Kogyo Kk Coating apparatus
JP2013017910A (en) * 2011-07-07 2013-01-31 Universal Seikan Kk Coating material supplying device of coating device
EP2749358A1 (en) * 2012-12-28 2014-07-02 Komori Corporation Liquid transferring apparatus
JP2015128772A (en) * 2015-03-30 2015-07-16 富士機械工業株式会社 Coating apparatus
JP2017001035A (en) * 2016-08-10 2017-01-05 富士機械工業株式会社 Coating device
KR102336266B1 (en) * 2021-10-28 2021-12-06 정성민 Removable gravure roll surface residual ink recovery and print quality control device on gravure roll

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012239976A (en) * 2011-05-19 2012-12-10 Fuji Kikai Kogyo Kk Coating apparatus
JP2013017910A (en) * 2011-07-07 2013-01-31 Universal Seikan Kk Coating material supplying device of coating device
EP2749358A1 (en) * 2012-12-28 2014-07-02 Komori Corporation Liquid transferring apparatus
JP2015128772A (en) * 2015-03-30 2015-07-16 富士機械工業株式会社 Coating apparatus
JP2017001035A (en) * 2016-08-10 2017-01-05 富士機械工業株式会社 Coating device
KR102336266B1 (en) * 2021-10-28 2021-12-06 정성민 Removable gravure roll surface residual ink recovery and print quality control device on gravure roll

Similar Documents

Publication Publication Date Title
JP2009172861A (en) Coating liquid feeder
JP6186365B2 (en) Equipment for flexographic printing of packaging material webs
US20120210891A1 (en) Pressure adjustment device of a chambered doctor blade system
KR20120094851A (en) Gravure coating apparatus
JPH0858069A (en) Ink supplying device for gravure printer
KR101794224B1 (en) Doctor chamber
JP6975714B2 (en) Flexographic printing equipment and inlet module
JP2015167934A (en) Coating applicator
JP5989843B2 (en) Coating equipment
KR102080845B1 (en) Gravure coating apparatus having air knife
JP2011067977A (en) Chamber type ink supply device
CN108290409B (en) Device for applying a fluid to a roller
US20130299094A1 (en) Metering system for applying a composition to a roll and methods of operating same
JP5055729B2 (en) Diaphragm pump and ink discharge printing apparatus used therefor.
JP2012066408A (en) Inking device, inking method, and gravure printing machine
JP2000084453A (en) Apparatus for supplying coating liquid to plate cylinder
JP4492133B2 (en) Coating liquid supply device
JP6891614B2 (en) Processing liquid coating equipment, printing equipment
JP6515540B2 (en) Liquid application apparatus and image forming system
JP2015039649A (en) Gravure coating apparatus
JP6225512B2 (en) Treatment liquid application device for inkjet printer
JP2004230248A (en) Coating apparatus
JPH043748B2 (en)
JPS6244158Y2 (en)
JP6346821B2 (en) Coating equipment