JP2020029030A - Aqueous varnish printing device - Google Patents

Aqueous varnish printing device Download PDF

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JP2020029030A
JP2020029030A JP2018155622A JP2018155622A JP2020029030A JP 2020029030 A JP2020029030 A JP 2020029030A JP 2018155622 A JP2018155622 A JP 2018155622A JP 2018155622 A JP2018155622 A JP 2018155622A JP 2020029030 A JP2020029030 A JP 2020029030A
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aqueous varnish
drying
aqueous
temperature
humidity
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JP7100337B2 (en
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鈴木　淳一
Junichi Suzuki
淳一 鈴木
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TOTSUKEN KK
Totsuken Co Ltd
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Totsuken Co Ltd
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Abstract

To provide an aqueous varnish printing device which achieves cost reduction in a heat source for aqueous varnish drying.SOLUTION: An aqueous varnish printing device 10 comprises aqueous varnish printing means and aqueous varnish drying means 20. In the aqueous varnish printing device 10, the aqueous varnish drying means 20 comprises an aqueous varnish drying duct 22 which is connected to an exhaust duct of UV ink printing means and uses a waste heat gas for the purpose of aqueous varnish drying.SELECTED DRAWING: Figure 1

Description

本発明はＵＶインクで印刷した印刷物の表面に水性ニスのコーティング処理を施す水性ニス印刷装置に関する。   The present invention relates to a water-based varnish printing apparatus for performing a water-based varnish coating process on the surface of a printed material printed with UV ink.

一般にＵＶインクを用いた印刷物を乾燥した後、水性ニス印刷装置を用いて印刷物の表面に光沢・耐摩耗性を付与する処理がある。
水性ニス印刷装置は、水性ニス（水性のワニス）を印刷物の表面に塗布する印刷手段と、塗布した水性ニスを乾燥する乾燥手段を備えている。従来、この乾燥手段は、熱源となる赤外線（ＩＲ）で生じる熱風を吹き付けて水分を蒸発させて、エマルジョン、樹脂を固化して乾燥させている（特許文献１，２は水性ニスの乾燥にＩＲを用いている）。 Generally, there is a process of drying a printed material using a UV ink and then imparting gloss and abrasion resistance to the surface of the printed material using an aqueous varnish printing apparatus.
The aqueous varnish printing apparatus includes printing means for applying an aqueous varnish (aqueous varnish) to the surface of a printed material, and drying means for drying the applied aqueous varnish. Conventionally, this drying means blows hot air generated by infrared rays (IR) as a heat source to evaporate water and solidify the emulsion and resin to dry. (Patent Documents 1 and 2 disclose IR for drying aqueous varnish. Is used).

しかしながら、赤外線を用いた乾燥手段は、短時間で所定温度の熱風を吹き付けて安定した乾燥が行えるものの熱源のコストがかかり装置も大型化してしまう。また、水性ニスの乾燥処理の際、熱風を所定湿度に維持しなければ、紙の印刷物の場合には収縮やワレ、フィルム・薄紙の印刷物の場合にはカールなどの不具合が生じてしまうという問題があった。
さらに、前段のＵＶインク印刷手段のＵＶランプのＵＶ照射の際に生じる発熱と、ＵＶインクの乾燥の際に生じる有機化合物からなる排熱ガスは、単に印刷装置外へ放出しており、排熱を有効活用できない状況であった。 However, the drying means using infrared rays can perform stable drying by blowing hot air at a predetermined temperature in a short time, but the cost of a heat source is increased and the apparatus is also increased in size. In addition, during the drying process of the aqueous varnish, if hot air is not maintained at a predetermined humidity, problems such as shrinkage and cracking in the case of paper prints and curling in the case of film and thin paper prints may occur. was there.
Further, the heat generated when the UV lamp of the UV ink printing means at the preceding stage irradiates the UV and the exhaust gas composed of an organic compound generated when the UV ink is dried are simply discharged outside the printing apparatus. Was not able to be used effectively.

特開２００７−１１１８７３号公報JP 2007-111873 A 特開２００８−８７３５４号公報JP 2008-87354 A

本発明が解決しようとする課題は、上記従来技術の問題点に鑑み、水性ニス乾燥の熱源コストの低減化を図る水性ニス印刷装置を提供することにある。   An object of the present invention is to provide an aqueous varnish printing apparatus which reduces the heat source cost of aqueous varnish drying in view of the above-mentioned problems of the related art.

本発明は、上記課題を解決するための第１の手段として、水性ニス印刷手段と水性ニス乾燥手段を備えた水性ニス印刷装置において、
前記水性ニス乾燥手段は、ＵＶインク印刷手段の排気ダクトに接続して排熱ガスを水性ニスの乾燥に用いる水性ニス乾燥ダクトを備えたことを特徴とする水性ニス印刷装置を提供することにある。
上記第１の手段によれば、従来の赤外線による乾燥手段と比べて、水性ニス乾燥の熱源コストを大幅に低減できる。 The present invention provides, as a first means for solving the above problems, an aqueous varnish printing apparatus comprising an aqueous varnish printing means and an aqueous varnish drying means,
The aqueous varnish drying device is provided with an aqueous varnish drying duct including an aqueous varnish drying duct that is connected to an exhaust duct of the UV ink printing device and uses exhaust heat gas for drying the aqueous varnish. .
According to the first means, the cost of the heat source for drying the aqueous varnish can be greatly reduced as compared with the conventional drying means using infrared rays.

本発明は、上記課題を解決するための第２の手段として、第１の手段において、前記水性ニス乾燥手段は、前記水性ニス乾燥ダクトの配管途中に前記排熱ガスをミストで所定湿度に加湿し、所定温度に冷却する加湿部を備えたことを特徴とする水性ニス印刷装置を提供することにある。
上記第２の手段によれば、所定湿度に加湿した熱風を用いることにより紙の印刷物の場合には収縮やワレ、フィルム・薄紙の印刷物の場合にはカールなどの不具合を防止できる。 The present invention provides, as a second means for solving the above problems, in the first means, wherein the aqueous varnish drying means humidifies the exhaust heat gas to a predetermined humidity with a mist in the middle of the aqueous varnish drying duct piping. Another object of the present invention is to provide an aqueous varnish printing apparatus comprising a humidifier for cooling to a predetermined temperature.
According to the second means, by using hot air humidified to a predetermined humidity, it is possible to prevent problems such as shrinkage and cracking in the case of paper prints and curling in the case of film and thin paper prints.

本発明は、上記課題を解決するための第３の手段として、第２の手段において、前記水性ニス乾燥手段は、前記水性ニス乾燥ダクトの配管途中に前記排熱ガス中に含まれる有機化合物の脱臭部を備えたことを特徴とする水性ニス印刷装置を提供することにある。
上記第３の手段によれば、排熱ガス中に含まれる有機化合物を除去して、良好な作業環境を維持できる。 The present invention provides, as a third means for solving the above problem, in the second means, wherein the aqueous varnish drying means comprises an organic compound contained in the exhaust heat gas in the middle of piping of the aqueous varnish drying duct. An object of the present invention is to provide an aqueous varnish printing apparatus including a deodorizing section.
According to the third means, an organic compound contained in the exhaust heat gas can be removed, and a favorable working environment can be maintained.

本発明は、上記課題を解決するための第４の手段として、第２の手段、又は第２の手段に従属する第３の手段において、前記水性ニス乾燥手段は、
前記水性ニス乾燥ダクト中の前記排熱ガスの温湿度を測定する温湿度センサと、
前記温湿度センサ及び前記加湿部に電気的に接続して、前記温湿度センサの測定値が前記排熱ガスの所定温湿度に収まる加湿制御を行う制御部を備えたことを特徴とする水性ニス印刷装置を提供することにある。
上記第４の手段によれば、印刷物の安定したコーティング処理が行える。 The present invention provides, as a fourth means for solving the above problems, a second means, or a third means subordinate to the second means, wherein the aqueous varnish drying means comprises:
Temperature and humidity sensor for measuring the temperature and humidity of the exhaust gas in the aqueous varnish drying duct,
An aqueous varnish, further comprising a control unit electrically connected to the temperature and humidity sensor and the humidifying unit, and performing humidification control in which a measured value of the temperature and humidity sensor falls within a predetermined temperature and humidity of the exhaust gas. A printing device is provided.
According to the above-mentioned fourth means, a stable coating treatment of the printed matter can be performed.

本発明によれば、従来の赤外線による乾燥手段と比べて、水性ニス乾燥の熱源コストを大幅に低減できる。
また所定湿度に加湿した熱風を用いることにより紙の印刷物の場合には収縮、ワレ、フィルム・薄紙の印刷物の場合にはカールを防止できる。
さらに紫外線照射手段から排出される排熱ガスの排熱をリサイクルして有効利用できる。 ADVANTAGE OF THE INVENTION According to this invention, the heat source cost of aqueous varnish drying can be reduced significantly compared with the conventional drying means by infrared rays.
By using hot air humidified to a predetermined humidity, shrinkage and cracking can be prevented in the case of paper prints, and curling can be prevented in the case of prints of film and thin paper.
Further, the waste heat of the waste heat gas discharged from the ultraviolet irradiation means can be recycled and used effectively.

本発明の水性ニス印刷装置の構成概略図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram of a configuration of an aqueous varnish printing apparatus of the present invention.

本発明の水性ニス印刷装置の実施形態について、添付の図面を参照しながら、以下詳細に説明する。
［水性ニス印刷装置１０］
本発明の水性ニス印刷装置１０は、ＵＶインクと水性ニスを用いて印刷物を印刷する印刷装置（前段でＵＶインクを用いた印刷を行い、後段で水性ニスを用いた印刷を行う装置）に設けている。図１は、本発明の水性ニス印刷装置の構成概略図である。図示のように本発明の水性ニス印刷装置１０は、水性ニス乾燥ダクト２２と、加湿部２４と、脱臭部２６、温湿度センサ２８、制御部３０を有する水性ニス乾燥手段２０と水性ニス印刷手段を備えている。水性ニス印刷手段はＵＶインクを用いた印刷物の表面に水性ニスを印刷する手段である。 An embodiment of the aqueous varnish printing apparatus of the present invention will be described in detail below with reference to the accompanying drawings.
[Aqueous varnish printing apparatus 10]
The aqueous varnish printing apparatus 10 of the present invention is provided in a printing apparatus that prints a printed material using a UV ink and an aqueous varnish (a device that performs printing using a UV ink in a first stage and performs printing using an aqueous varnish in a second stage). ing. FIG. 1 is a schematic configuration diagram of the aqueous varnish printing apparatus of the present invention. As shown, the aqueous varnish printing apparatus 10 of the present invention includes an aqueous varnish drying duct 20, a humidifying unit 24, a deodorizing unit 26, a temperature / humidity sensor 28, and a control unit 30. It has. The aqueous varnish printing means is means for printing an aqueous varnish on the surface of a printed material using UV ink.

水性ニス乾燥ダクト２２は、一端がＵＶインク印刷手段の排気ダクトに接続し、他端が水性ニス乾燥手段２０の本体に接続したダクトである。ここで排気ダクトは、ＵＶインク印刷工程で生じるＵＶ照射手段（ＵＶランプ）の発熱と、ＵＶインクを乾燥して生じる有機化合物（有機溶剤）からなる排熱ガスを集約して外部へ排気するダクトである。なお排気ダクト中の排熱ガスの温度は、一例として１２０℃〜１４０℃であり、湿度２０〜４０％である。本実施形態の水性ニス乾燥ダクト２２はダンパー（不図示）を介して排気ダクトから分岐させて排熱ガスの一部又は全て（ＵＶインク印刷手段の規模に応じて変更可能）を水性ニスの乾燥工程に用いている。   The aqueous varnish drying duct 22 has one end connected to the exhaust duct of the UV ink printing unit and the other end connected to the main body of the aqueous varnish drying unit 20. Here, the exhaust duct is a duct that collects and exhausts heat generated by the UV irradiating means (UV lamp) generated in the UV ink printing process and exhaust heat gas composed of an organic compound (organic solvent) generated by drying the UV ink. It is. The temperature of the exhaust heat gas in the exhaust duct is, for example, 120 ° C. to 140 ° C. and the humidity is 20% to 40%. The aqueous varnish drying duct 22 of the present embodiment branches from the exhaust duct via a damper (not shown) to dry a part or all of the exhaust heat gas (which can be changed according to the scale of the UV ink printing means). Used in the process.

通常、排熱ガスは高温、低湿度かつ有機化合物を含んでいるため、そのままでは水性ニスの乾燥工程に適用することができない。そこで、本発明では加湿部２４を水性ニス乾燥ダクト２２上に設け、通過する排熱ガスを所定湿度（一例として７０％以上）に加湿及び所定温度（一例として６０℃〜８０℃）に冷却している。本実施形態の加湿部２４は、一例として加湿部本体の内部をミスト雰囲気にするミスト噴霧器を適用している。   Normally, since the exhaust heat gas has a high temperature, a low humidity, and contains an organic compound, it cannot be directly applied to a drying process of an aqueous varnish. Therefore, in the present invention, the humidifying unit 24 is provided on the aqueous varnish drying duct 22, and the exhaust gas passing therethrough is humidified to a predetermined humidity (for example, 70% or more) and cooled to a predetermined temperature (for example, 60 ° C. to 80 ° C.). ing. As an example, the humidifier 24 of the present embodiment employs a mist sprayer that makes the inside of the humidifier main body a mist atmosphere.

脱臭部２６は、水性ニス乾燥ダクト２２上に設け、通過する排熱ガス中に含まれる有機化合物を除去している。本実施形態の脱臭部２６は、一例として活性炭、ゼオライト等を含むフィルターを用いて小型化を図っている。脱臭部２６は、水性ニス乾燥ダクト２２上で加湿部２４よりも上流側に設けて、下流側の加湿部２４で排熱ガスを所定湿度に維持できるようにしている。なお排熱ガス中に含まれる有機化合物（水溶性）が加湿部２４で除去可能な場合には脱臭部２６の構成を省略することもできる。
温湿度センサ２８は、脱臭部２６を通過した排熱ガスの温度及び湿度を測定可能なセンサである。温湿度センサ２８は後述する制御部３０と有線又は無線を介して電気的に接続して測定値を送信可能に構成している。
制御部３０は、温湿度センサ２８及び加湿部２４と有線又は無線を介して電気的に接続している。制御部３０は、受信した温湿度センサ２８の測定値が排熱ガスの所定温湿度の範囲内に収まるように加湿制御を行っている。一例として排熱ガスの温度を６０℃〜８０℃、湿度を７０％以上の設定範囲とする。より具体的に制御部３０は、温湿度センサ２８の測定値がこの設定範囲に収まるように加湿部２４のミスト噴霧量を増減する制御（例えば温度が８０℃よりも高温の場合にはミスト量を増量し、温度が４０℃よりも低い場合にはミスト量を減量する）を行っている。この他、制御部による温湿度の制御は、水性ニス乾燥ダクト２２の送風ファン（不図示）の送風量の増減によっても実施できる。 The deodorizing section 26 is provided on the aqueous varnish drying duct 22 to remove organic compounds contained in the exhaust gas passing therethrough. The size of the deodorizing unit 26 of the present embodiment is reduced by using a filter containing activated carbon, zeolite, or the like as an example. The deodorizing section 26 is provided upstream of the humidifying section 24 on the aqueous varnish drying duct 22 so that the exhaust gas can be maintained at a predetermined humidity in the downstream humidifying section 24. When the organic compound (water-soluble) contained in the exhaust heat gas can be removed by the humidifying section 24, the configuration of the deodorizing section 26 can be omitted.
The temperature and humidity sensor 28 is a sensor that can measure the temperature and humidity of the exhaust gas that has passed through the deodorizing unit 26. The temperature / humidity sensor 28 is configured to be electrically connected to a control unit 30 described later via a wire or wirelessly so as to be able to transmit a measured value.
The control unit 30 is electrically connected to the temperature / humidity sensor 28 and the humidification unit 24 via a wire or wirelessly. The control unit 30 performs humidification control so that the received measurement value of the temperature and humidity sensor 28 falls within a predetermined temperature and humidity range of the exhaust gas. As an example, the temperature of the exhaust heat gas is set to a setting range of 60 ° C. to 80 ° C., and the humidity is set to a setting range of 70% or more. More specifically, the control unit 30 performs control to increase or decrease the mist spray amount of the humidifying unit 24 so that the measurement value of the temperature and humidity sensor 28 falls within this set range (for example, when the temperature is higher than 80 ° C., Is increased, and when the temperature is lower than 40 ° C., the amount of mist is reduced). In addition, the control of the temperature and the humidity by the control unit can also be performed by increasing or decreasing the amount of air blown by a blower fan (not shown) of the aqueous varnish drying duct 22.

［作用］
上記構成による本発明の水性ニス乾燥装置の作用について、以下説明する。
ＵＶインク印刷手段によるＵＶインクの乾燥工程でＵＶランプの発熱と有機溶剤からなる排熱ガスが生じる。各印刷手段の排熱ガスは排気ダクトに集約されて外部へ排気される。この排熱ガスの一部又は全てを水性ニス乾燥ダクト２２から取り込む。取り込む量はダンパーによって任意に調整可能である。
そして水性ニス乾燥ダクト２２上の脱臭部２６で排熱ガス中に含まれる有機化合物を除去する。次いで水性ニス乾燥ダクト２２上の加湿部２４でミスト雰囲気中、加湿および冷却する。加湿部２４の下流側の水性ニス乾燥ダクト２２上に設置した温湿度センサ２８で排熱ガスの温湿度を測定する。
測定値が制御部３０へ送信され、制御部３０では測定値が設定湿度（７０％以上）、設定温度（６０℃〜８０℃）に収まるように、加湿部２４のミスト雰囲気を増減して制御する。
このような本発明の水性ニス印刷装置１０によれば、従来の赤外線による乾燥手段と比べて、水性ニス乾燥の熱源コストを大幅に低減できる。
また所定湿度に加湿した熱風を用いることにより紙の印刷物の場合には収縮、ワレ、フィルム・薄紙の印刷物の場合にはカールを防止できる。 [Action]
The operation of the aqueous varnish drying apparatus of the present invention having the above configuration will be described below.
In the drying process of the UV ink by the UV ink printing means, heat generated by the UV lamp and exhaust heat gas composed of an organic solvent are generated. The exhaust heat gas of each printing unit is collected in an exhaust duct and exhausted to the outside. Part or all of the exhaust heat gas is taken in from the aqueous varnish drying duct 22. The amount to be taken in can be arbitrarily adjusted by a damper.
Then, organic compounds contained in the exhaust heat gas are removed by the deodorizing section 26 on the aqueous varnish drying duct 22. Next, the humidifying part 24 on the aqueous varnish drying duct 22 humidifies and cools in a mist atmosphere. A temperature and humidity sensor 28 installed on the aqueous varnish drying duct 22 on the downstream side of the humidifying unit 24 measures the temperature and humidity of the exhaust gas.
The measured value is transmitted to the control unit 30, and the control unit 30 controls the mist atmosphere of the humidifying unit 24 by increasing or decreasing the mist atmosphere so that the measured value falls within the set humidity (70% or more) and the set temperature (60 ° C to 80 ° C). I do.
According to such an aqueous varnish printing apparatus 10 of the present invention, the cost of a heat source for aqueous varnish drying can be significantly reduced as compared with conventional drying means using infrared rays.
By using hot air humidified to a predetermined humidity, shrinkage and cracking can be prevented in the case of paper prints, and curling can be prevented in the case of prints of film and thin paper.

以上、本発明の好ましい実施形態について説明した。しかしながら、本発明は、上記実施形態に何ら制限されることなく、本発明の主旨を逸脱しない範囲において、種々の変更が可能である。
また、本発明は、実施形態において示された組み合わせに限定されることなく、種々の組み合わせによって実施可能である。 The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
In addition, the present invention can be implemented by various combinations without being limited to the combinations shown in the embodiments.

本発明の水性ニス印刷装置は、特に印刷物の表面にコーティング処理を施す印刷分野において産業上の利用可能性を有する。   INDUSTRIAL APPLICABILITY The aqueous varnish printing apparatus of the present invention has industrial applicability, particularly in the printing field where a coating treatment is performed on the surface of a printed material.

１０ 水性ニス印刷装置
２０ 水性ニス乾燥手段
２２ 水性ニス乾燥ダクト
２４ 加湿部
２６ 脱臭部
２８ 温湿度センサ
３０ 制御部
Reference Signs List 10 aqueous varnish printing apparatus 20 aqueous varnish drying means 22 aqueous varnish drying duct 24 humidifying unit 26 deodorizing unit 28 temperature and humidity sensor 30 control unit

Claims (4)

水性ニス印刷手段と水性ニス乾燥手段を備えた水性ニス印刷装置において、
前記水性ニス乾燥手段は、ＵＶインク印刷手段の排気ダクトに接続して排熱ガスを水性ニスの乾燥に用いる水性ニス乾燥ダクトを備えたことを特徴とする水性ニス印刷装置。 In an aqueous varnish printing apparatus comprising an aqueous varnish printing means and an aqueous varnish drying means,
The aqueous varnish printing apparatus according to claim 1, wherein the aqueous varnish drying means includes an aqueous varnish drying duct connected to an exhaust duct of the UV ink printing means and using exhaust heat gas for drying the aqueous varnish. 請求項１に記載された水性ニス印刷装置であって、
前記水性ニス乾燥手段は、前記水性ニス乾燥ダクトの配管途中に前記排熱ガスをミストで所定湿度に加湿し、所定温度に冷却する加湿部を備えたことを特徴とする水性ニス印刷装置。 An aqueous varnish printing apparatus according to claim 1,
The aqueous varnish printing device, wherein the aqueous varnish drying means further includes a humidifier that humidifies the exhaust heat gas to a predetermined humidity with a mist and cools the exhaust gas to a predetermined temperature in a pipe of the aqueous varnish drying duct. 請求項２に記載された水性ニス印刷装置であって、
前記水性ニス乾燥手段は、前記水性ニス乾燥ダクトの配管途中に前記排熱ガス中に含まれる有機化合物の脱臭部を備えたことを特徴とする水性ニス印刷装置。 An aqueous varnish printing apparatus according to claim 2,
The aqueous varnish printing device, wherein the aqueous varnish drying means includes a deodorizing section for the organic compound contained in the exhaust gas in the middle of the piping of the aqueous varnish drying duct. 請求項２、又は請求項２に従属する請求項３に記載された水性ニス印刷装置であって、
前記水性ニス乾燥手段は、
前記水性ニス乾燥ダクト中の前記排熱ガスの温湿度を測定する温湿度センサと、
前記温湿度センサ及び前記加湿部に電気的に接続して、前記温湿度センサの測定値を前記排熱ガスの所定温湿度に収める加湿制御を行う制御部を備えたことを特徴とする水性ニス印刷装置。 An aqueous varnish printing apparatus according to claim 2, which is dependent on claim 2, or claim 2,
The aqueous varnish drying means,
Temperature and humidity sensor for measuring the temperature and humidity of the exhaust gas in the aqueous varnish drying duct,
An aqueous varnish, further comprising a control unit electrically connected to the temperature and humidity sensor and the humidifying unit, and performing a humidification control for keeping a measurement value of the temperature and humidity sensor within a predetermined temperature and humidity of the exhaust gas. Printing device.
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