JP2011183725A - Ink pan - Google Patents

Ink pan Download PDF

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JP2011183725A
JP2011183725A JP2010052866A JP2010052866A JP2011183725A JP 2011183725 A JP2011183725 A JP 2011183725A JP 2010052866 A JP2010052866 A JP 2010052866A JP 2010052866 A JP2010052866 A JP 2010052866A JP 2011183725 A JP2011183725 A JP 2011183725A
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ink pan
ink
coating liquid
plate cylinder
cylinder roll
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JP5526878B2 (en
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Masanori Ikuma
正典 生熊
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Toppan Inc
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Toppan Printing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink pan that is able to uniformly supply and attach to a plate cylinder roll even a highly viscous coating liquid or application liquid such as ink, and that facilitates cleaning by reducing the capacity of the ink pan, and hence the amount of application liquid or the like. <P>SOLUTION: In the ink pan for a gravure coater or gravure printer, which supplies a coating liquid or the like to a plate surface by immersing a plate cylinder roll into a coating liquid or an application liquid such as ink, which has been stored in the ink pan, the bottom of the immersed portion of the plate cylinder roll has a saw-teeth shape in cross-section perpendicular to the rotary shaft of the plate cylinder roll. Recess and projections in the form of valleys and mountains are formed along the lengthwise direction of the ink pan. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明はグラビアコーターやグラビア印刷機の版胴ロールに、塗工液またはインキ等の塗液類を供給するために用いられるインキパンに関する。   The present invention relates to an ink pan used for supplying a coating liquid such as a coating liquid or ink to a plate cylinder roll of a gravure coater or a gravure printing machine.

グラビアコーターやグラビア印刷機では、種々の方法で塗工液またはインキ等の塗液類が版胴ロールに供給されている。その中では、インキパンを用いた供給方法が広く用いられている。この供給方法は、例えば、版胴ロールの下方に、塗液類の排出口を設けた矩形状のインキパンを設置し、そのインキパン内に供給ポンプによって塗液類を供給・貯留させた後、インキパン内の塗液類に版胴ロールを回転させながらその一部を浸漬させることによって、塗液類を版胴ロールに供給させる方法や、供給ポンプによってインキパン内に供給・貯留させた塗液類には版胴ロールを浸漬させずに、インキパン内に設置されたファニッシャーロールを介して塗液類を供給させる方法等である。   In a gravure coater and a gravure printing machine, coating liquids such as coating liquid or ink are supplied to a plate cylinder roll by various methods. Among them, a supply method using an ink pan is widely used. For example, a rectangular ink pan provided with a coating liquid discharge port is installed below the plate cylinder roll, and the coating liquid is supplied and stored by a supply pump in the ink pan. A method of supplying the coating liquid to the plate cylinder roll by immersing a part of the printing cylinder roll while rotating it in the coating liquid inside, or a coating liquid supplied and stored in the ink pan by a supply pump Is a method of supplying coating liquids through a finisher roll installed in an ink pan without immersing the plate cylinder roll.

このような塗液類の供給方法においては、供給ポンプは塗液類の実際の使用量、すなわち版胴ロールから被塗工物への転移量より多い量の塗液類をインキパン内に供給するようになっているため、インキパン内には常に一定量の塗液類が貯留され、余剰の塗液類はインキパンに設けられている排出口より排出された後、供給ポンプへ戻されるようになっている。   In such a coating liquid supply method, the supply pump supplies a larger amount of coating liquid into the ink pan than the actual amount of coating liquid used, that is, the amount of transfer from the plate cylinder roll to the object to be coated. Therefore, a certain amount of coating liquid is always stored in the ink pan, and excess coating liquid is discharged from the discharge port provided in the ink pan and then returned to the supply pump. ing.

また、このような塗液類の供給方法においては、インキパンと供給ポンプを繋ぐ輸液管の配管経路に、粘度調整装置を挿入することによって、塗液類の粘度を一定に保つように調整したり、フィルターを設置することによって塗液類中の異物を除去するようにしているのが一般的である。   In such a coating liquid supply method, the viscosity of the coating liquid can be adjusted to be kept constant by inserting a viscosity adjusting device in the piping path of the infusion pipe connecting the ink pan and the supply pump. In general, a foreign substance in the coating liquid is removed by installing a filter.

一方、インキパン内の貯液量を最適化する方法としては、インキパン内にその長手方向に沿って堰を設け、塗工液やインキ等の塗液類の貯液量を最適化する方法が従来から一般的に採用されている。より具体的には、特許文献1に示すような、薄型インキパンの貯液部分と余剰液の回収用樋との境界を成すように、上部に切り欠きを一定間隔で設けた堰を設置し、さらにその切り欠き部の開口量を変更可能とする調整板を設けることで、塗液類の貯液量を最適化する方法である。   On the other hand, as a method for optimizing the amount of liquid stored in the ink pan, there has conventionally been a method of providing a weir along the longitudinal direction in the ink pan and optimizing the amount of liquid stored in coating liquids such as coating liquid and ink. Is generally adopted. More specifically, as shown in Patent Document 1, a weir with notches provided at regular intervals on the upper part is installed so as to form a boundary between the liquid storage portion of the thin ink pan and the excess liquid recovery basket, Furthermore, this is a method of optimizing the liquid storage amount of the coating liquid by providing an adjustment plate that can change the opening amount of the notch.

また特許文献2に示すような、排出口23を持った外周パン17の内側にインキの貯液パン22を配置すると共に、貯液パン22と外周パン17の境界を成す堰18の上部と下部のそれぞれに上部切り欠き25と下部切り欠き26とを設けることによって、堰18の下部周辺のインキの滞留を防止しながら、外周パン17から排出口23へインキ19を流出させるようにした方法も採用されている(図3参照)。   Further, as shown in Patent Document 2, an ink storage pan 22 is disposed inside an outer peripheral pan 17 having a discharge port 23, and upper and lower portions of a weir 18 that forms a boundary between the liquid storage pan 22 and the outer peripheral pan 17. A method of allowing the ink 19 to flow out from the outer peripheral pan 17 to the discharge port 23 while preventing the ink from staying around the lower portion of the weir 18 by providing an upper notch 25 and a lower notch 26 in each of the two. It is adopted (see FIG. 3).

特公平8−032445号公報Japanese Patent Publication No. 8-032445 特開平7−314649号公報JP 7-314649 A

しかしながら、これらの特許文献に示されているような従来の方法では、高粘度の塗工インキを使用した場合、前述の供給口から、塗工液またはインキ等の塗液類がインキパン
内に均一に充填される以前に、比較的供給口に近い位置にある堰の切り欠き部から塗液類が流出してしまって、インキパン内に均一に拡げることができず、その結果、版胴ロールに均一に着液が行われず、極端な場合には部分的に塗工抜けや脱刷が発生して塗工や印刷の品質を維持できないという問題があった。
However, in the conventional methods as shown in these patent documents, when high-viscosity coating ink is used, coating liquids such as coating liquid or ink are uniformly fed into the ink pan from the aforementioned supply port. Before filling, the coating liquid flows out from the notch portion of the weir relatively close to the supply port and cannot be spread uniformly in the ink pan. There is a problem that the liquid is not uniformly applied and, in an extreme case, coating omission or reprinting occurs partially and the quality of coating or printing cannot be maintained.

特に、供給口と排出口がインキパン内のインキの流れ方向の下流側で版胴ロールの一方の側にある場合には、供給された塗液類は版胴ロールによって押し出されてしまって、搬送ロールの版面に塗液類が均一に広がる前に排出口から流出してしまうし、供給口と排出口とが版胴ロールを挟んだそれぞれの側に位置するように設置されている場合には、供給口から注入してきた塗液類が、版面に均一に拡がる前に版胴ロールによって排出口側に押し出されてしまい、やはり版面にインキが均一に供給できないという問題があった。   In particular, when the supply port and the discharge port are on one side of the plate cylinder roll on the downstream side of the ink flow direction in the ink pan, the supplied coating liquid is pushed out by the plate cylinder roll and is conveyed. If the coating liquid flows out from the discharge port before it spreads evenly on the plate surface of the roll, and the supply port and the discharge port are located on each side of the plate cylinder roll The coating liquid injected from the supply port is pushed out to the discharge port side by the plate cylinder roll before spreading uniformly on the plate surface, and there is a problem that the ink cannot be uniformly supplied to the plate surface.

また同様の方法では、インキパンの内部形状が複雑になるために清掃作業が困難であり、インキパン容積が大きくなることで残液も多くなってしまうという問題があった。   In addition, the same method has a problem in that the internal shape of the ink pan is complicated, so that the cleaning operation is difficult, and the residual liquid increases as the ink pan volume increases.

本発明は上記した問題点を解消するためになされたもので、高粘度の塗工液やインキ等の塗液類でも、版胴ロールに均一に供給し着液させることができ、かつインキパンの形状を単純にし、容量を小さくすることで、塗液類の残液量を少なくし、清掃を容易にするインキパンを提供することを課題としている。   The present invention has been made in order to solve the above-described problems, and even coating liquids such as high-viscosity coating liquids and inks can be uniformly supplied to the plate cylinder roll for landing, and the ink pan It is an object of the present invention to provide an ink pan that simplifies the shape and reduces the volume, thereby reducing the remaining amount of the coating liquid and facilitating cleaning.

上記の課題を解決するための手段として、請求項1に記載の発明は、インキパンに貯められた塗工液またはインキ等の塗液類に、回転する版胴ロールの一部を浸漬させながらその版面に塗液類を供給するグラビアコーターやグラビア印刷機のインキパンであって、版胴ロールの浸漬部分の底面が、版胴ロールの回転軸に垂直な断面において鋸刃状をなし、その谷部と山部の凹凸がインキパンの長手方向に亘って形成されていることを特徴とするインキパンである。   As means for solving the above-mentioned problems, the invention according to claim 1 is characterized in that a part of a rotating plate cylinder roll is immersed in a coating liquid such as a coating liquid or ink stored in an ink pan. An ink pan of a gravure coater or gravure printing machine that supplies coating liquid to the plate surface, and the bottom surface of the immersion portion of the plate cylinder roll forms a saw blade shape in a cross section perpendicular to the rotation axis of the plate cylinder roll, and its valley The ink pan is characterized in that the unevenness of the crests is formed along the longitudinal direction of the ink pan.

本発明のインキパンは以上の構成からなるので、インキパン底面の鋸刃上の凹凸が連続した複数の堰となり、供給ノズルからインキパンに流入した塗工液やインキ等の塗液類が、長手方向に拡げられることによって版面に均一に供給される。   Since the ink pan of the present invention is configured as described above, the unevenness on the saw blade at the bottom of the ink pan becomes a plurality of continuous weirs, and coating liquids such as coating liquid and ink flowing into the ink pan from the supply nozzle are longitudinally arranged. By being expanded, it is uniformly supplied to the printing plate.

また、供給された塗工液やインキ等の塗液類は、版胴ロールの回転に伴って回転下流方向に押し流されていくが、インキパン底面の鋸刃上の凹凸が連続した堰となって複数の貯留部を形成するため、塗液類が版胴ロールによって過剰にかき出されることがなく、塗工抜けを防ぐことが出来る。   In addition, the supplied coating liquids such as coating liquid and ink are swept away in the downstream direction as the plate cylinder roll rotates, but the unevenness on the saw blade on the bottom of the ink pan becomes a continuous weir. Since a plurality of reservoirs are formed, coating liquids are not excessively scraped out by the plate cylinder roll, and coating omission can be prevented.

さらに、インキパンの底面に凹凸を設けることで上記の効果を保ったまま、インキパン自体の容積を小さくし残液を削減することが可能であり、また切り欠き部や開口部を持つ堰等がないために清掃作業が容易である。   Furthermore, it is possible to reduce the volume of the ink pan itself by reducing the volume of the ink pan while maintaining the above effects by providing irregularities on the bottom surface of the ink pan, and there is no weir or the like having a notch or an opening. Therefore, cleaning work is easy.

本発明のインキパンの概略の断面構成を示す説明図である。It is explanatory drawing which shows the general | schematic cross-section structure of the ink pan of this invention. 本発明のインキパンを上方から観察した時の様子を示す説明図である。It is explanatory drawing which shows a mode when the ink pan of this invention is observed from upper direction. 従来のインキパンの概略の断面構成を示す説明図である。It is explanatory drawing which shows the general | schematic cross-section structure of the conventional ink pan.

以下、本発明のインキパンを、一実施形態に基づいて、図1から図2を参照して説明する。   Hereinafter, an ink pan of the present invention will be described with reference to FIGS. 1 to 2 based on an embodiment.

本発明のインキパンは、図1や図2に示すように、インキパン5中に貯留されている塗液類7に回転する版胴ロール1の一部を浸漬させながらその版面2に塗液類を供給するためのインキパンであって、版胴ロール1の浸漬部分の底面6が、版胴ロール1の回転軸に垂直な断面において鋸刃状をなし、その谷部と山部の凹凸がインキパン5の長手方向に亘って形成されていることを特徴とするインキパンである。   As shown in FIGS. 1 and 2, the ink pan of the present invention applies the coating liquid to the plate surface 2 while immersing a part of the rotating plate cylinder roll 1 in the coating liquid 7 stored in the ink pan 5. An ink pan for feeding, wherein the bottom surface 6 of the immersion portion of the plate cylinder roll 1 has a saw blade shape in a cross section perpendicular to the rotation axis of the plate cylinder roll 1, and the concave and convex portions of the valleys and peaks are the ink pan 5. The ink pan is formed over the longitudinal direction of the ink pan.

インキパン5は、版胴ロール1の下方で、インキパン5内に塗工液やインキ等の塗液類7が溜められた時に、版胴ロール1の下側の一部が液中に浸漬するように設置され、版胴ロール1は回転自在に取り付けられており、その周面には凹凸模様のセルまたは斜線等によって版面2が形成されている。   The ink pan 5 is so arranged that a part of the lower side of the plate cylinder roll 1 is immersed in the liquid when the coating liquid 7 such as a coating liquid or ink is stored in the ink pan 5 below the plate cylinder roll 1. The plate cylinder roll 1 is rotatably mounted, and a plate surface 2 is formed on the peripheral surface thereof by concavo-convex cells or diagonal lines.

またドクターホルダー4に保持されているドクター3は、版胴ロール1の版面2に付着した余剰の塗液類を掻き取り、掻き取られた塗液類をインキパン5内に流し込むようになっている。   The doctor 3 held by the doctor holder 4 scrapes off excess coating liquid adhering to the plate surface 2 of the plate cylinder roll 1 and pours the scraped coating liquid into the ink pan 5. .

一方、インキパン5は上部が開放された箱型をしており、インキパン5内での版胴ロール1の回転方向の上流側でかつインキパン5の中央付近には、供給ノズル8が設置され、供給管9によって、図示しない供給ポンプやフィルターや粘度調整装置と接続されており、塗工液やインキ等の塗液類を再びインキパン5内に供給できるようになっている。   On the other hand, the ink pan 5 has a box shape with an open top, and a supply nozzle 8 is installed on the upstream side in the rotation direction of the plate cylinder roll 1 in the ink pan 5 and in the vicinity of the center of the ink pan 5. The pipe 9 is connected to a supply pump, a filter, and a viscosity adjusting device (not shown) so that coating liquids such as coating liquid and ink can be supplied again into the ink pan 5.

インキパン5は、版胴ロール1の浸漬部分の底面6が、版胴ロール1の回転軸に垂直な断面において鋸刃状をなし、その谷部と山部の凹凸がインキパン5の長手方向に亘って形成されている。この底面6の鋸刃形状は、インキパン5自体の底板を成型加工しても良いし、後からインキパン5内に設置するような別部材としても良い。また、鋸刃形状の形状および個数や版面2との隙間量などは、塗液類の粘度や固形分濃度、塗工量および供給量などによって適宜決められるようになっている。   In the ink pan 5, the bottom surface 6 of the immersion portion of the plate cylinder roll 1 has a saw blade shape in a cross section perpendicular to the rotation axis of the plate cylinder roll 1, and the concave and convex portions of the valley portion and the mountain portion extend in the longitudinal direction of the ink pan 5. Is formed. The saw blade shape of the bottom surface 6 may be formed by molding the bottom plate of the ink pan 5 itself, or may be a separate member that is installed in the ink pan 5 later. Further, the shape and number of saw blades and the amount of gap between the plate surface 2 and the like are appropriately determined according to the viscosity, solid content concentration, coating amount and supply amount of the coating liquids.

供給ノズル8からインキパン5に流入した塗液類は、底面6における最上流の鋸刃形状の山部によって、一旦は堰き止められてインキパン5の長手方向に拡がり、やがて山部をオーバーフローし、下流側の鋸刃形状の谷部へ流入していく。塗液類は、版胴ロール1の浸漬部分では版面2の回転に伴う流れによって順次下流へかき出されていくが、底面6の凹凸が堰となって版面2の巾方向に均一に拡げられるため、過剰にかき出されて着液が欠落することはない。   The coating liquid that has flowed into the ink pan 5 from the supply nozzle 8 is once dammed up by the uppermost saw-blade peak on the bottom surface 6 and spreads in the longitudinal direction of the ink pan 5, and eventually overflows the peak. It flows into the trough of the side saw blade shape. The coating liquid is sequentially scraped downstream by the flow accompanying the rotation of the plate surface 2 at the immersion portion of the plate cylinder roll 1, but the unevenness of the bottom surface 6 becomes a weir and is spread uniformly in the width direction of the plate surface 2. Therefore, the liquid is not scraped off excessively and the liquid is not lost.

やがて底面6における最下流の鋸刃形状の山部をオーバーフローした塗液類は、排液溝10に押し出されたのち、排液口11から排液管12によって、図示しない供給ポンプに再び送られる。   The coating liquid overflowing the most downstream sawtooth-shaped peak on the bottom surface 6 is pushed out into the drainage groove 10 and then sent again from the drainage port 11 to the supply pump (not shown) through the drainage pipe 12. .

以上説明したように、本発明のインキパンは、底面が版胴ロールの回転軸に垂直な断面において鋸刃状をなし、その谷部と山部の凹凸がインキパンの長手方向に亘って堰を形成するため、高粘度の塗工液やインキ等の塗液類でも浸漬される版面によって過剰にかき出されることがなく、版面への着液を巾方向に亘って均一にすることができるため、塗工または印刷品質の向上に寄与することが出来る。   As described above, the ink pan of the present invention has a saw-blade shape in the cross section whose bottom surface is perpendicular to the rotation axis of the plate cylinder roll, and the irregularities of the valleys and ridges form weirs in the longitudinal direction of the ink pan. Therefore, it is not excessively scraped by the plate surface soaked in coating liquids such as high-viscosity coating liquids and inks, and the liquid landing on the plate surface can be made uniform across the width direction. It can contribute to the improvement of coating or printing quality.

また前述の効果により、版面とインキパン底面の距離、すなわち版面と鋸刃形状の山部との隙間を小さくすることができるので、塗液類の貯液量すなわちインキパン自体の容積が小さくなり、塗液類の使用量の削減に寄与することができる。さらに切り欠き部や開口部を持つ堰等がないために清掃作業を容易にすることが可能である。   In addition, because of the above-described effect, the distance between the plate surface and the bottom surface of the ink pan, that is, the gap between the plate surface and the crest-shaped portion of the saw blade, can be reduced. This can contribute to a reduction in the amount of liquids used. Further, since there is no weir or the like having a notch or an opening, cleaning work can be facilitated.

1、13・・・版胴ロール
2、14・・・版面
3、15・・・ドクター
4、16・・・ドクターホルダー
5・・・インキパン
6・・・底板
7、19・・・塗工液やインキ等の塗液類
8、20・・・供給ノズル
9、21・・・供給配管
10・・・排液溝
11、23・・・排液口
12、24・・・排液配管
17・・・外周パン
18・・・堰
22・・・貯液パン
25・・・上部切り欠き部
26・・・下部切り欠き部
27・・・供給ポンプ
28・・・粘度調整装置
29・・・フィルター
DESCRIPTION OF SYMBOLS 1, 13 ... Plate cylinder roll 2, 14 ... Plate surface 3, 15 ... Doctor 4, 16 ... Doctor holder 5 ... Ink pan 6 ... Bottom plate 7, 19 ... Coating liquid Coating liquids 8 and 20 ... supply nozzles 9, 21 ... supply piping 10 ... drainage grooves 11, 23 ... drainage ports 12, 24 ... drainage piping 17, .... Outer peripheral pan 18 ... Weir 22 ... Liquid storage pan 25 ... Upper notch 26 ... Lower notch 27 ... Supply pump 28 ... Viscosity adjusting device 29 ... Filter

Claims (1)

インキパンに貯められた塗工液またはインキ等の塗液類に、回転する版胴ロールの一部を浸漬させながらその版面に塗液類を供給するグラビアコーターやグラビア印刷機のインキパンにおいて、版胴ロールの浸漬部分の底面が、版胴ロールの回転軸に垂直な断面において鋸刃状をなし、その谷部と山部の凹凸がインキパンの長手方向に亘って形成されていることを特徴とするインキパン。   In an ink pan of a gravure coater or gravure printing machine that supplies coating liquid to the printing surface while immersing a part of a rotating plate cylinder roll in coating liquid or ink stored in the ink pan. The bottom surface of the immersed part of the roll has a saw blade shape in a cross section perpendicular to the rotation axis of the plate cylinder roll, and the concave and convex portions of the valley and the peak are formed over the longitudinal direction of the ink pan. Ink pan.
JP2010052866A 2010-03-10 2010-03-10 Ink pan Expired - Fee Related JP5526878B2 (en)

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