JP2010260194A - Gravure printing machine - Google Patents

Gravure printing machine Download PDF

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JP2010260194A
JP2010260194A JP2009110769A JP2009110769A JP2010260194A JP 2010260194 A JP2010260194 A JP 2010260194A JP 2009110769 A JP2009110769 A JP 2009110769A JP 2009110769 A JP2009110769 A JP 2009110769A JP 2010260194 A JP2010260194 A JP 2010260194A
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ink
peripheral speed
gravure printing
water
doctor knife
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JP5483531B2 (en
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Katsumi Nakaya
克己 中屋
Shigeki Kinto
茂樹 金籐
Nobuyuki Kawai
信行 川合
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Fuji Tokushu Shigyo Co Ltd
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Fuji Tokushu Shigyo Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a gravure printing machine which can prevent "thread-like ink blur" and "plate curdle" from occurring, when gravure printing is performed in water ink, and accelerate printing speed beyond the conventional speed level in the case that oily ink is used. <P>SOLUTION: This gravure printing machine is configured of the furnisher roll 5 arranged on the opposite side to the doctor knife 4. In addition, now on the doctor knife 4 side, an ink distributing roller 5a is arranged in a state of non-contact with the ink 2 between an ink pan 1 and a plate drum 3, on the doctor knife 4 side. Further, the circumferential velocity of the furnisher roll 5 is set 5 to 50% of the circumferential velocity of the plate drum 3, and the circumferential velocity of the ink distributing roller 5a is set 5 to 120% of the circumferential velocity of the plate drum 3. In this way, it is possible to perform high-quality printing by preventing "thread-like ink blur" or "plate curdle" attributed to the high surface tension of water ink from occurring. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、グラビア印刷機に関するもので、更に詳しくは、水性グラビアインキを用いて印刷する場合に問題となる濡れ不良とこれに起因する“糸状のインキのかすれ”“版かぶり”等の問題を解決し、油性グラビアインキを用いて印刷する場合には、印刷速度を従来に増して増大することが出来るグラビア印刷機に関するものである。   The present invention relates to a gravure printing machine. More specifically, the present invention relates to problems such as poor wetting and “fogging of thread-like ink” and “plate fog” which are problems when printing with aqueous gravure ink. The present invention relates to a gravure printing machine that can increase the printing speed in the case of printing using oil-based gravure ink.

従来から使用されている油性グラビアインキ（以下「油性インキ」という。）に対して、水性グラビアインキ（以下「水性インキ」という。）の場合、印刷における作業環境を大幅に改善できる特徴があることから、今後のグラビア印刷は、水性グラビアインキ使用の方向に向かうものと思われる。   In the case of water-based gravure ink (hereinafter referred to as “water-based ink”) compared to oil-based gravure ink (hereinafter referred to as “oil-based ink”) that has been used in the past, there is a feature that can greatly improve the working environment in printing Therefore, future gravure printing is likely to go in the direction of using water-based gravure ink.

しかし、従来の油性インキを使用するグラビア印刷機において、そのファニッシャーロール５は、図３に示すように油性インキ２を満したインキパン１と版胴３間であって、ドクターナイフ４に対してその反対側に配置し、その周速は版胴３の周速の５〜５０％に設定していることから、このグラビア印刷機をそのまま水性インキ用に使用した場合、水性インキなるが故の特性（表面張力）により濡れ不足が発生し、「糸状のインキのかすれ」や「版かぶり」等の原因となる。   However, in a gravure printing machine using a conventional oil-based ink, the finisher roll 5 is between the ink pan 1 and the plate cylinder 3 filled with the oil-based ink 2 as shown in FIG. Since the peripheral speed is set to 5 to 50% of the peripheral speed of the plate cylinder 3, when this gravure printing machine is used for water-based ink as it is, it becomes water-based ink. Insufficient wetting occurs due to the characteristics (surface tension) of the ink, causing "fogging of thread-like ink" and "plate fog".

このため、従来のグラビア印刷機において、そのまま水性インキを使用する場合には、印刷作業速度は７０ｍ／分までしか良好な印刷物が得られないという問題があった。   For this reason, in a conventional gravure printing machine, when water-based ink is used as it is, there is a problem that a good printed matter can be obtained only at a printing work speed of up to 70 m / min.

そこで、本件出願人は、油性インキ使用の場合と同等の印刷速度で印刷を可能にするため、図２に示すように、ファニッシャーロール５、５ａを版胴３の両サイドに配置し、且つこのファニッシャーロール５、５ａの周速を版胴３の周速に対して５〜５０％に設定すると、油性インキの場合と同様に、高速で、“糸状のインキのかすれ”や“版かぶり”のない良質の印刷物を得ることができたことから、特願２０００−１４７１２号（特開２００１−１９９０４９号）として特許出願を行っている。   Therefore, the applicant of the present invention arranges the finisher rolls 5 and 5a on both sides of the plate cylinder 3, as shown in FIG. Further, when the peripheral speed of the finisher rolls 5 and 5a is set to 5 to 50% with respect to the peripheral speed of the plate cylinder 3, as in the case of oil-based ink, high-speed “fading of thread-like ink” and “ Since it was possible to obtain a high-quality printed matter without “plate fog”, a patent application was filed as Japanese Patent Application No. 2000-14712 (Japanese Patent Laid-Open No. 2001-199049).

特開２００１−１９９０４９号公報（特願２０００−１４７１２号）Japanese Patent Laid-Open No. 2001-199049 (Japanese Patent Application No. 2000-14712)

しかし、上記図２及び特許文献１のファニッシャーロール５、５ａを用いて水性グラビア印刷を行う場合、印刷作業始動時から数十メートル／分の低速印刷においては、水性インキ２をインキパン１から版胴３に供給したとき、版胴３の遠心力と水性インキの重力により飛び散ることは無いが、水性インキ２を供給してからドクターナイフ４に到達するまでに時間がかかるため、供給された水性インキ２は、版胴３の表面でその大きな表面張力により丸まろうとする。この結果、インキ濡れの濃淡によりインキムラが発生し、“糸状のかすれ”が印刷物に発生する。この解決策としては、ドクターナイフ４側版胴３の面においてドクターナイフ４に到達するまで適切な水性インキ量を供給し且つ表面張力によって水性インキ２が丸まらないで、均一な塗膜状態にすれば良いことが解った。
本発明の目的は、水性インキを用いた場合には、均一な塗膜状態を確保し、油性インキを用いた場合には従来以上の速度で印刷が可能なグラビア印刷機を提供することである。 However, when water-based gravure printing is performed using the above-described FIG. 2 and the finisher rolls 5 and 5a of Patent Document 1, the water-based ink 2 is removed from the ink pan 1 in low-speed printing of several tens of meters / minute from the start of the printing operation. When supplied to the plate cylinder 3, it does not scatter due to the centrifugal force of the plate cylinder 3 and the gravity of the water-based ink, but it takes time to reach the doctor knife 4 after supplying the water-based ink 2. The water-based ink 2 tends to be rounded by the large surface tension on the surface of the plate cylinder 3. As a result, ink unevenness occurs due to the density of ink wetting, and “thread-like blur” occurs in the printed matter. As a solution, an appropriate amount of water-based ink is supplied on the surface of the doctor knife 4 side plate cylinder 3 until it reaches the doctor knife 4, and the water-based ink 2 is not rounded due to the surface tension, so that a uniform coating state is obtained. I knew that
An object of the present invention is to provide a gravure printing machine that ensures a uniform coating state when water-based ink is used, and capable of printing at a speed higher than conventional when oil-based ink is used. .

上記課題を解決するため、請求項１に記載のグラビア印刷機においては、ドクターナイフの反対側にファニッシャーロールを配置して成るグラビア印刷機において、前記ドクターナイフ側であって、インキパンとドクターナイフ間にインキ均しロールを配置すると共に、前記ファニッシャーロールの周速を版胴の周速の５〜５０％に設定し、前記インキ均しロールの周速を版胴の周速の５〜１２０％に設定して成ること、を特徴とするものである。   In order to solve the above problems, in the gravure printing machine according to claim 1, in the gravure printing machine in which a finisher roll is arranged on the opposite side of the doctor knife, the ink knife and the doctor on the doctor knife side. An ink leveling roll is disposed between the knives, the peripheral speed of the finisher roll is set to 5 to 50% of the peripheral speed of the plate cylinder, and the peripheral speed of the ink leveling roll is set to the peripheral speed of the plate cylinder. It is characterized by being set to 5 to 120%.

この発明によると、低速印刷の場合、版胴面より水性インキが飛び散ることは無いが、速度が遅い為水性インキを供給してからドクターナイフに到達するまでに時間がかかるため、供給された水性インキは、版胴表面でその大きな表面張力により丸まろうとしてやはり濡れ不良が生じ、高速度時とは異なる“糸状のインキのかすれ”が発生するが、この“糸状のインキのかすれ”は、インキ均しロールを設け、かつこの周速を版胴の周速の５０〜１２０％に設定したことにより、版胴表面においてその表面張力により丸まろうとする水性インキの量を絞り、塗膜の表面を均一化しながらドクターナイフまで到達させることにより解消できる。この周速の設定は、使用するインキの性状や気温及び紙質等を考慮して行う。   According to the present invention, in the case of low-speed printing, the water-based ink does not scatter from the plate cylinder surface, but since the speed is low, it takes time to reach the doctor knife after supplying the water-based ink. The ink tends to curl due to its large surface tension on the surface of the plate cylinder, resulting in poor wetting, resulting in “smear of thread-like ink” that is different from that at high speed. This “smear of thread-like ink” By providing an ink leveling roll and setting this peripheral speed to 50 to 120% of the peripheral speed of the plate cylinder, the amount of water-based ink that tends to be rounded by the surface tension on the plate cylinder surface is reduced, and the coating film It can be solved by reaching the doctor knife while making the surface uniform. This peripheral speed is set in consideration of the properties of ink to be used, temperature, paper quality, and the like.

本発明は、水性インキばかりでなく、油性インキ使用にもそのまま適用することができ、油性インキ使用の場合には従来よりも印刷速度を高めることが可能になる。   The present invention can be applied not only to water-based inks but also to the use of oil-based inks, and in the case of using oil-based inks, it becomes possible to increase the printing speed as compared with the prior art.

請求項１に記載の発明によると、作業動作開始時から約７０メートル／分の低速印刷時においても“糸状のインキのかすれ”が発生しない印刷物を得ることができる。   According to the first aspect of the present invention, it is possible to obtain a printed matter that does not cause “fogging of the thread-like ink” even during low-speed printing of about 70 meters / minute from the start of the work operation.

この結果、水性インキ使用時において、印刷開始時の無駄を無くすことができると共に従来に比較して生産性を高めることができる。   As a result, when water-based ink is used, waste at the start of printing can be eliminated and productivity can be increased as compared with the conventional case.

また、油性インキ使用においては、従来より７〜１０％程度印刷速度を高めての印刷が可能になる。   In addition, when oil-based ink is used, printing can be performed with a printing speed increased by about 7 to 10%.

請求項１〜３に記載した本発明に係るグラビア印刷機を示す説明図である。It is explanatory drawing which shows the gravure printing machine which concerns on this invention described in Claims 1-3. ファニッシャーロールを版胴の両サイドに設けた特許文献１のグラビア印刷機におけるファニッシャーロール装置の説明図である。It is explanatory drawing of the finisher roll apparatus in the gravure printing machine of patent document 1 which provided the finisher roll in the both sides of the plate cylinder. 従来のグラビア印刷機の説明図である。It is explanatory drawing of the conventional gravure printing machine.

本発明は、水性インキを用いて行うグラビア印刷機を主に説明するが、油性インキを用いる場合も水性インキを用いる場合と同様となるので、油性インキ使用についてはその説明を省略する。   In the present invention, a gravure printing machine that uses water-based ink will be mainly described. However, the use of oil-based ink is the same as that in the case of using water-based ink, and therefore the description of use of oil-based ink is omitted.

ファニッシャーロールは、図１に示すように、水性インキ２を満したインキパン１と版胴３とインキパン１間において、ドクターナイフ４と反対側に配置されている。また、ドクターナイフ４側にはインキパン１とドクターナイフ４間であって、インキ２と非接触状態でインキ均しロール５ａが設けられている。図中６は圧胴、７はフィルムである。   As shown in FIG. 1, the finisher roll is disposed on the side opposite to the doctor knife 4 between the ink pan 1, the plate cylinder 3, and the ink pan 1 filled with the water-based ink 2. Further, an ink leveling roll 5 a is provided on the doctor knife 4 side between the ink pan 1 and the doctor knife 4 and in a non-contact state with the ink 2. In the figure, 6 is an impression cylinder and 7 is a film.

上記構成において、ファニッシャーロール５の周速（表面回転速度）は版胴３の周速（表面回転速度）に対して５〜５０％の範囲に設定され、インキ均しロール５ａの周速（表面回転速度）は版胴３の周速（表面回転速度）に対して５〜１２０％の範囲に設定されている。   In the above configuration, the peripheral speed (surface rotational speed) of the finisher roll 5 is set in a range of 5 to 50% with respect to the peripheral speed (surface rotational speed) of the plate cylinder 3, and the peripheral speed of the ink leveling roll 5a. (Surface rotation speed) is set in a range of 5 to 120% with respect to the peripheral speed (surface rotation speed) of the plate cylinder 3.

上記周速において、ファニッシャーロール５の周速が５０％を越えた場合、インキの濡れが過多となり、前記したインキたまりが増大し、５％以下になると濡れ不足が発生するようになる。   At the above peripheral speed, if the peripheral speed of the finisher roll 5 exceeds 50%, the ink wets excessively, the ink pool increases, and if it reaches 5% or less, insufficient wetting occurs.

一方、インキ均しロール５ａの周速が１２０％を越えた場合、インキの塗膜（濡れ）不足が発生し、５％以下になると塗膜（濡れ）過多の問題が発生するようになる。   On the other hand, when the peripheral speed of the ink leveling roll 5a exceeds 120%, insufficient ink coating (wetting) occurs, and when it is 5% or less, a problem of excessive coating (wetting) occurs.

本実施例は、請求項１及び２に記載した発明に対応するもので、図１に基づいて詳細に説明する。   This embodiment corresponds to the invention described in claims 1 and 2 and will be described in detail with reference to FIG.

図１において、１は皿状のインキパンであって、このインキパン１内には、水性インキ２が満されている。この水性インキ２には、東洋インキ製造株式会社製の商品名アクワエコールＳ（表面張力２４ｄｙｎｅ／ｃｍ）が用いられている。   In FIG. 1, reference numeral 1 denotes a dish-shaped ink pan. The ink pan 1 is filled with water-based ink 2. For this water-based ink 2, trade name “Aqua Ecole S” (surface tension 24 dyne / cm) manufactured by Toyo Ink Manufacturing Co., Ltd. is used.

３は版胴であって、この版胴３の表面にはレーザー製版により版深１３μ、線数３５０が加工されている。４はドクターナイフ、５はドクターナイフ４と反対例に配置されたファニッシャーロール、５ａはドクターナイフ４と同じ例であって、インキパン１とドクターナイフ４間に配置されたインキ均しロールであって、ファニッシャーロール５の周速は版胴３の周速３００ｍ／分に対して５０％の周速１５０ｍ／分に設定され、インキ均しロール５ａの周速は版胴３の周速３００ｍ／分に対して１００％の周速３００ｍ／分に設定されている。６は圧胴、７は二軸延伸ＰＰフィルム（２０μ）である。   Reference numeral 3 denotes a plate cylinder. The surface of the plate cylinder 3 is processed with a plate depth of 13 μm and a line number of 350 by laser plate making. 4 is a doctor knife, 5 is a finisher roll disposed in the opposite direction to the doctor knife 4, and 5 a is the same example as the doctor knife 4, and is an ink leveling roll disposed between the ink pan 1 and the doctor knife 4. The peripheral speed of the finisher roll 5 is set to a peripheral speed of 150 m / min, which is 50% of the peripheral speed of the plate cylinder 3, and the peripheral speed of the ink leveling roll 5 a is the peripheral speed of the plate cylinder 3. The peripheral speed is set to 300 m / min, which is 100% of the speed of 300 m / min. 6 is an impression cylinder, and 7 is a biaxially stretched PP film (20 μm).

本実施例１により３００ｍ／分の印刷を行った結果、ファニッシャーロール５でインキの塗膜が版胴３面に形成され、インキ均しロール５ａによりインキの丸まりが阻止されて塗膜が均一に調整されることにより、特に印刷開始直後の“糸状のインキのかすれ”のない、良好な印刷物が得られた。   As a result of printing at 300 m / min according to Example 1, an ink film was formed on the surface of the plate cylinder 3 by the finisher roll 5, and the ink was prevented from being rounded by the ink leveling roll 5a. By adjusting uniformly, a good printed matter without “fogging of thread-like ink” immediately after the start of printing was obtained.

比較例１Comparative Example 1

図１において、ファニッシャーロール５の周速を版胴３の周速に対して５５％に設定し、インキ均しロール５ａの周速を版胴３の周速に対して１２５％に設定した以外実施例１と同一条件にて印刷を行ったところ、全体的に“糸状のインキのかすれ”が発生した。   In FIG. 1, the peripheral speed of the finisher roll 5 is set to 55% with respect to the peripheral speed of the plate cylinder 3, and the peripheral speed of the ink leveling roll 5a is set to 125% with respect to the peripheral speed of the plate cylinder 3. When printing was carried out under the same conditions as in Example 1 except for the above, “thread-like ink fading” occurred as a whole.

比較例２Comparative Example 2

ファニッシャーロール５及びインキ均しロール５ａの周速を版胴３の周速に対して４％に設定した以外実施例１と同一条件にて印刷を行ったところ、特に印刷始動から８０ｍ／分のところまで“糸状のインキのかすれ”が多く見られた。   Printing was performed under the same conditions as in Example 1 except that the peripheral speed of the finisher roll 5 and the ink leveling roll 5a was set to 4% with respect to the peripheral speed of the plate cylinder 3, and in particular, 80 m / m from the start of printing. A lot of “fogging of thread-like ink” was seen up to the minute.

インキに油性グラビアインキ（東洋インキ製造株式会社製商品名ＮＥＷＬＰスーパー、表面張力１７ｄｙｎｅ／ｃｍ）用いた以外は、実施例１と同一条件で印刷を行った。この結果、通常の３２０ｍ／分に対して印刷速度を３５０ｍ／分まであげても良好な印刷物が得られた。   Printing was performed under the same conditions as in Example 1 except that oil-based gravure ink (trade name NEWLP Super, manufactured by Toyo Ink Manufacturing Co., Ltd., surface tension 17 dyne / cm) was used as the ink. As a result, a good printed matter was obtained even when the printing speed was increased to 350 m / min with respect to the usual 320 m / min.

比較例３Comparative Example 3

図３に示した、ドクターナイフ４の反対側にのみファニッシャーロール５を配置したグラビア印刷機を用いて実施例１と同一条件で印刷を行ったところ、２００ｍ／分以上の印刷速度ではインキが落下して印刷ムラが発生し、良好な印刷物は得られなかった。   When printing was performed under the same conditions as in Example 1 using the gravure printing machine in which the finisher roll 5 was disposed only on the opposite side of the doctor knife 4 shown in FIG. 3, the ink was used at a printing speed of 200 m / min or more. Drops, printing unevenness occurred, and good printed matter could not be obtained.

以上のとおり、ファニッシャーロール５をドクターナイフ４の反対側に配置し、インキ均しロール５ａをインキパン１と胴版３間であって、インキ２と非接触状態となるようにドクターナイフ４側に配置し、このインキ均しロール５ａの周速を版胴３の周連の５〜１２０％に設定し、ファニッシャーロール５の周速を版胴３の周速に対して５〜５０％に設定したことにより、高表面張力の水性グラビアインキを用いても、印刷作業始動時の数十メートル／分の低速印刷作業から高速印刷作業まで、インキの丸まりや濡れ不良が発生せず“糸状のインキのかすれ”や“版かぶり”のない、良好な印刷物が得られた。よって本発明によると、水性インキ利用による環境問題への対応が可能となり、また、油性インキを使用した場合には印刷速度のアップを図ることが可能となる。   As described above, the finisher roll 5 is disposed on the opposite side of the doctor knife 4, and the ink leveling roll 5 a is disposed between the ink pan 1 and the body plate 3 and in a non-contact state with the ink 2. The peripheral speed of the ink leveling roll 5 a is set to 5 to 120% of the peripheral speed of the plate cylinder 3, and the peripheral speed of the finisher roll 5 is set to 5 to 5 with respect to the peripheral speed of the plate cylinder 3. By setting it to 50%, even when using water-based gravure ink with a high surface tension, ink rounding and wetting defects do not occur from low speed printing work at the start of printing work to several tens of meters / minute to high speed printing work. Good prints with no “fogging of thread-like ink” or “plate fog” were obtained. Therefore, according to the present invention, it is possible to cope with environmental problems due to the use of water-based ink, and it is possible to increase the printing speed when oil-based ink is used.

１ インキパン
２ 水性インキ
３ 版胴
４ ドクターナイフ
５ 第一ロール
５ａ インキ均しロール
６ 圧胴
７ フィルム DESCRIPTION OF SYMBOLS 1 Ink pan 2 Water-based ink 3 Plate cylinder 4 Doctor knife 5 First roll 5a Ink leveling roll 6 Impression cylinder 7 Film

Claims (3)

ドクターナイフの反対側にファニッシャーロールを配置して成るグラビア印刷機において、前記ドクターナイフ側であって、インキパンとドクターナイフ間にインキ均しロールを配置すると共に、前記ファニッシャーロールの周速を版胴の周速の５〜５０％に設定し、前記インキ均しロールの周速を版胴の周速の５〜１２０％に設定して成るグラビア印刷機。   In the gravure printing machine in which the finisher roll is arranged on the opposite side of the doctor knife, an ink leveling roll is arranged on the doctor knife side between the ink pan and the doctor knife, and the periphery of the finisher roll is arranged. A gravure printing machine in which the speed is set to 5 to 50% of the peripheral speed of the plate cylinder and the peripheral speed of the ink leveling roll is set to 5 to 120% of the peripheral speed of the plate cylinder. 印刷用インキとして、水性グラビアインキが用いられることを特徴とする請求項１に記載のグラビア印刷機。   The gravure printing machine according to claim 1, wherein water-based gravure ink is used as the printing ink. 印刷用インキとして、油性グラビアインキが用いられることを特徴とする請求項１に記載のグラビア印刷機。   2. The gravure printing machine according to claim 1, wherein an oil-based gravure ink is used as the printing ink.
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JP2016215474A (en) * 2015-05-19 2016-12-22 凸版印刷株式会社 Letterpress printing equipment and organic functional element
KR101753115B1 (en) * 2017-01-31 2017-07-03 신영재 Gravure press
WO2019131900A1 (en) 2017-12-27 2019-07-04 花王株式会社 Gravure printing method

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CN105235383A (en) * 2015-10-28 2016-01-13 玉溪环球彩印纸盒有限公司 Self-cleaning ink supply manner for printing plate of intaglio printing press
CN109823045A (en) * 2019-02-20 2019-05-31 青海盐湖工业股份有限公司 A kind of straight print formula printing equipment for water-based ink

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JPH05158009A (en) * 1991-12-04 1993-06-25 Nissha Printing Co Ltd Thin film formation device
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JP2001199049A (en) * 2000-01-24 2001-07-24 Nihon Tokkyo Kanri Co Ltd Furnisher roller device for gravure printer
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JPS55140563A (en) * 1979-04-21 1980-11-04 Roland Man Druckmasch Ink device for printing machine
JPH05158009A (en) * 1991-12-04 1993-06-25 Nissha Printing Co Ltd Thin film formation device
JP2001058393A (en) * 1999-08-23 2001-03-06 Toppan Printing Co Ltd Gravure printing unit
JP2001199049A (en) * 2000-01-24 2001-07-24 Nihon Tokkyo Kanri Co Ltd Furnisher roller device for gravure printer
JP2002321336A (en) * 2001-04-26 2002-11-05 Dainippon Printing Co Ltd Intaglio rotary press

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016215474A (en) * 2015-05-19 2016-12-22 凸版印刷株式会社 Letterpress printing equipment and organic functional element
KR101753115B1 (en) * 2017-01-31 2017-07-03 신영재 Gravure press
WO2019131900A1 (en) 2017-12-27 2019-07-04 花王株式会社 Gravure printing method
US11254828B2 (en) 2017-12-27 2022-02-22 Kao Corporation Gravure printing method

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