KR20160010710A - Gravure printing apparatus, and printing method utilizing the same - Google Patents

Gravure printing apparatus, and printing method utilizing the same Download PDF

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Publication number
KR20160010710A
KR20160010710A KR1020140090365A KR20140090365A KR20160010710A KR 20160010710 A KR20160010710 A KR 20160010710A KR 1020140090365 A KR1020140090365 A KR 1020140090365A KR 20140090365 A KR20140090365 A KR 20140090365A KR 20160010710 A KR20160010710 A KR 20160010710A
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South Korea
Prior art keywords
ink
temperature
reservoir
roll
storage tank
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KR1020140090365A
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Korean (ko)
Inventor
고성림
김재민
김지엽
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건국대학교 산학협력단
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Priority to KR1020140090365A priority Critical patent/KR20160010710A/en
Publication of KR20160010710A publication Critical patent/KR20160010710A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/18—Impression cylinders
    • B41F13/187—Impression cylinders for rotogravure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/04—Cleaning arrangements or devices for inking rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/10—Intaglio printing ; Gravure printing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

The present invention relates to a roll-to-roll gravure printing apparatus and a printing method thereof, and more particularly to a roll-to-roll gravure printing apparatus and a printing method in which quality of a printed matter is enhanced and a pattern roll is easily cleaned, (10) in which a printing pattern is formed on an outer circumferential surface and a push roll (20) in which a pattern roll is rotated together with the pattern roll, characterized in that a part of the pattern roll (10) Or a washing liquid is stored; A temperature detector 120 installed in the storage tank for detecting a temperature; A temperature controller 130 for controlling the temperature of the storage tank; An ultrasonic vibration unit 140 for generating ultrasonic waves in the storage tank; And a controller 200 for controlling the operation of the temperature controller 130 or the ultrasonic vibrator 140 according to the temperature detected by the temperature detector 120.

Figure P1020140090365

Description

A roll-to-roll gravure printing apparatus and a printing method thereof,

The present invention relates to a roll-to-roll gravure printing apparatus and a printing method thereof, and more particularly, to a roll-to-roll gravure printing apparatus and a printing method which improve the quality of a printed matter and facilitate the cleaning work of a pattern roll.

Gravure printing is performed by filling the grooves or cells with ink, bringing the grooves or cells into contact with the print, and transferring the ink filled in the grooves or cells to the print by applying pressure.

On the other hand, the gravure master plate has grooves or cells formed on the surface of a cylindrical shape to constitute a pattern roll. The printed material uses a web in the form of a roll, and the ink of the pattern roll is transferred onto the web The method is referred to as a roll-to-roll method.

In particular, as electronic products have become multifunctional and miniaturized, there has been developed a technique of printing electronic devices through electronic printing in accordance with the development of printing technology and the trend of simple and lightweight components. For example, RFID (Radio Frequency Identification) is excellent in recognizing, has a short recognition time, and has a merit that it can store a large amount of data. In order to actively apply the RFID tag in a distribution system, mass production is essential, The low productivity that can not be solved by the printing method and the high production cost due to the complicated process can be solved by the roll-to-roll printing method.

In addition, gravure printing is printed on a roll-shaped substrate, and is used in various soft wrapping paper.

On the other hand, various types of polymer resins are used in gravure printing in order to adjust the printability and the like of the ink itself in consideration of the characteristics of the printed matter. Usually, the ink 100 is diluted with 50% of solvent.

Such gravure printing ink has a low viscosity and has a low viscosity, so that the printing material is mostly transferred to a non-absorbent material (hereinafter referred to as " non-absorbent material " Film is usually used and printing is performed at a speed of 100 to 140 m per minute, so that rapid drying is required.

Therefore, the gravure printing process has a large influence on the printing quality due to the characteristics of the ink used. In particular, since the gravure printing ink is diluted with the volatile solvent, the concentration is changed as the printing time is increased to obtain a uniform printing pattern I can not.

In particular, multilayer flexible electronic devices are stacked in layers and printed, and a uniform pattern shape must be ensured in each print layer to prevent the electrical performance of electronic devices from being combined.

1 (a) and 1 (b) are data showing a pattern change according to a printing process time in a roll-to-roll gravure printing apparatus according to the prior art, and are data obtained by printing straight lines of a certain width.

As can be seen from FIGS. 1 (a) and 1 (b), the width of the line narrows as the printing time elapses. Particularly, the width of the upper portion of the line is significantly changed. This is because as the printing time passes, the ink solidifies within the pattern roll halftone dot and the ink can not be completely transferred to the printing object.

Patent Registration No. 10-1179381 (Publication Date: September 3, 2012) Japanese Unexamined Patent Application Publication No. 2004-98557 (published date: Apr. 04, 2004) Published Patent Publication No. 10-2010-0002405 (Published date: 2010.01.07)

SUMMARY OF THE INVENTION The present invention seeks to provide a roll-to-roll gravure printing apparatus and a printing method therefor which improve the quality of printed matter and facilitate the cleaning operation of the pattern roll.

In order to achieve the above object, a roll-to-roll gravure printing apparatus according to the present invention is a roll-to-roll gravure printing apparatus including a pattern roll having a printing pattern formed on an outer circumferential surface thereof and a pressing roll rotated together with the pattern roll, A reservoir in which the ink or the cleaning liquid is stored so that a portion of the ink or the cleaning liquid is immersed; A temperature detector disposed in the reservoir to detect a temperature; A temperature controller for controlling the temperature of the storage tank; An ultrasonic vibrator for generating ultrasonic waves in the reservoir; And a controller for controlling the operation of the temperature controller or the ultrasonic vibrator according to the temperature detected by the temperature detector.

Preferably, according to the present invention, there is provided an ink supply apparatus comprising: an ink storage portion to which ink is supplied; And a circulation pump circulating the ink in the ink reservoir to the reservoir, and more preferably, the liquid reservoir to supply the liquid to the reservoir; And a switching valve for switching a flow path so as to selectively circulate the cleaning liquid in the cleaning liquid storage unit to the storage tank by the circulation pump.

Preferably, in the present invention, the ink return line between the reservoir and the ink reservoir is provided with a check valve for preventing back flow of the ink.

Preferably, in the present invention, a check valve is provided in the washing liquid return line between the storage tank and the washing liquid storing unit to prevent the washing liquid from flowing backward.

Next, a roll-to-roll gravure printing method according to the present invention is characterized in that ultrasonic waves are generated in a storage tank in which ink is stored so that a part of the pattern roll is immersed, and ink in the storage tank is circulated to stir the ink transferred to the pattern roll.

Preferably, the present invention is characterized in that the temperature in the storage tank is detected and the storage tank is cooled so that the temperature is kept below the set temperature.

A roll-to-roll gravure printing method according to the present invention includes a pattern roll, a push roll on which the pattern roll is rotated, a storage tank in which ink or a cleaning liquid is stored so that a part of the pattern roll is immersed, An ultrasonic vibrator for generating ultrasonic waves in the reservoir; an ink reservoir for supplying ink; and a controller for controlling the flow of the ink in the reservoir, And a controller for controlling the operation of the temperature controller or the ultrasonic vibrator according to the temperature detected by the temperature detector, the printing method using the roll-to-roll gravure printing apparatus, The ultrasonic vibrator is operated during the printing process to apply ultrasonic waves to the ink in the reservoir And raw and by operating the circulation pump, wherein the ink is thus made of the circular parts of the ink reservoir and the reservoir.

Preferably, in the present invention, the control unit compares the detection signal transmitted from the temperature detector and, when the detected temperature is equal to or higher than the set temperature, operates the temperature controller to maintain the ink in the reservoir below the set temperature .

The roll-to-roll gravure printing apparatus and printing method according to the present invention are characterized in that means for generating ultrasonic waves in a reservoir in which ink is stored so that a part of the pattern roll is immersed and means for circulating ink in the reservoir are provided, The ink is agitated to prevent precipitation of ink in the storage tank and to induce decomposition of the agglomerated nanoparticles, thereby preventing curing of the ink due to oxidation of the ink and vaporization of the solvent, thereby improving the printing quality.

Further, the present invention has the effect of detecting the temperature of the ink in the reservoir and providing a means capable of maintaining the temperature below a certain temperature, thereby maintaining the characteristics of the ink uniform during the printing process.

Next, the present invention has an effect that the pattern roll can be cleaned without separating the pattern roll from the facility, and the pattern roll can be conveniently cleaned.

1 (a) and 1 (b) are graphs showing data showing a pattern change according to a printing process time in a roll-to-roll gravure printing apparatus according to the related art,
Fig. 2 is an overall configuration diagram of a roll-to-roll gravure printing apparatus according to the present invention,

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1, the roll-to-roll gravure printing apparatus according to the present invention comprises a pattern roll 10 having a printing pattern formed on the outer circumferential surface thereof and a pattern roll 10 which is rotated together with the pattern roll 10, And a doctor blade 30 for removing surplus ink on the surface of the pattern roll 10. The doctor blade 30 is provided on the surface of the pattern roll 10,

Each of the pattern roll 10 and the pushing roll 20 is provided with a rotation driving part for rotational driving. The pattern roll 10 has a predetermined pattern of grooves or cells in which the ink to be transferred to the web 1 is filled, .

In the present embodiment, the pattern roll 10 is illustrated as being directly printed on a web, which is a printed matter. However, the printing roll 10 may be printed by transferring the contents to be printed on a separate blanket roll and transferring the ink to the printed matter There will be.

The reservoir 110 is filled with ink or cleaning liquid, and the pattern roll 10 is disposed so as to be partially immersed in the ink or the cleaning liquid of the reservoir 110. On the other hand, the height of the storage tank 110 can be adjusted by an LM guide (not shown).

The storage tank 110 is provided with a temperature detection unit 120 and may be installed on the bottom or side of the storage tank 110 within a range where the temperature of the ink filled in the storage tank 110 can be detected. The temperature detector 120 may be one temperature detection sensor or may comprise a plurality of temperature detection sensors distributed in the storage tank 110 to take an average value of the temperature detection sensors. The signal detected by the temperature detector 120 is transmitted to the controller 200.

In the roll-to-roll printing process at room temperature and atmospheric pressure, the ink is exposed to the air, so that oxidation of the ink and vaporization of the solvent may occur rapidly. In particular, the ink used for the printing electron must be stored at a temperature lower than 10 ° C Oxidation and aging of the catalyst can be prevented.

The storage tank 110 is provided with a temperature control unit 130 to control the temperature of the ink in the storage tank 110 during the printing process.

The heat regulating unit 130 may be a heat exchanging unit that maintains the storage tank 110 at a predetermined temperature by performing heat exchange by circulation of the heating medium. At this time, the heat medium circulating pipe of the heat exchanging unit is connected to the bottom surface or the side wall of the storage tank 110 . The temperature control unit may be a semiconductor device such as a thermal wire or a thermoelectric device capable of controlling the temperature in addition to the heat exchanger, but is not limited thereto.

The temperature controller 130 controls the temperature by the control signal of the controller 200.

One or a plurality of ultrasonic vibration units 140 are provided on the bottom surface of the storage tank 110. The ultrasonic vibration unit 140 serves to stir the ink filled in the storage tank 110 during the printing process, And serves to remove ink remaining in the cells (recesses) of the pattern roll 10 immersed in the cleaning liquid. The operation of the ultrasonic vibration unit 140 is performed by the control unit 200.

In the present invention, the reservoir 110 is filled with ink during the printing process to supply ink to the pattern roll 10, and when the pattern roll is cleaned, the cleaning liquid is filled to remove the residual ink of the pattern roll 10 Lt; / RTI >

Specifically, the present invention includes an ink storage unit 150 for storing and supplying ink, and a circulation pump 160 for circulating and supplying ink in the ink storage unit 150 to a storage tank. More preferably, And a switching valve 180 for switching the flow path so as to selectively circulate the cleaning liquid in the cleaning liquid storage unit 170 to the storage tank 110 by the circulation pump 170 .

The circulation pump 160 pumps the ink stored in the ink storage portion 150 or the cleaning liquid stored in the cleaning liquid storage portion 170 to the storage tank 110 along the flow path switched according to the operation of the switching valve 180 Thereby circulating the ink or the cleaning liquid.

Preferably, the circulation pump 160 is provided with an electric motor M (or an inverter), and the operation speed is variably controlled by the controller 200 so that the discharge amount can be controlled.

For example, the switching valve 180 may be provided by a known three-way valve, the two input ports being connected to the ink reservoir 150 and the cleaning liquid reservoir 170, respectively, And the two input ports are switched by the control signal of the controller 200 to discharge the ink or the cleaning liquid through the output port. In the present embodiment, the switching valve 180 is an electronic valve controlled by the control unit 200, but it may be a manual type valve operated manually.

A check valve 151 may be provided on the ink return line between the reservoir 110 and the ink reservoir 150 to prevent reverse flow of the ink. A check valve 171 may be provided on the washing liquid return line of FIG.

The ink return line between the reservoir 110 and the ink reservoir 150 is provided with a valve 152 for interrupting the discharge of ink and a valve 152 is provided between the reservoir 110 and the reservoir 170. [ A manual valve 172 capable of interrupting the flow path may also be provided on the return line.

The control unit 200 receives the detection signal transmitted from the temperature detection unit 120, compares the detected temperature with the set temperature, and controls the temperature control unit 130 to maintain the ink in the storage tank 110 at a predetermined temperature or lower do.

The control unit 200 may control the operation of the ultrasonic vibration unit 140 so that the ultrasonic vibration unit 140 may be controlled separately from the control of the temperature control unit 130 when the ink in the storage tank 110 rises above the set temperature. Can be suspended.

In the printing apparatus of the present invention configured as described above, the ink is stirred by the ultrasonic vibration generated in the ultrasonic vibration unit 140 in the storage tank 110 during the printing process, and the ink is stirred by the circulation pump 160 The circulation flow of the ink circulating along the ink reservoir 150 and the circulation flow of the ink causes the prevention of the precipitation of the ink in the reservoir 110 and the decomposition of the agglomerated nanoparticles, Curing of the ink due to oxidation or vaporization of the solvent is prevented.

Further, the printing apparatus of the present invention detects the ink temperature in the reservoir 110 during the printing process, and when the detected temperature is equal to or higher than the set temperature, the temperature control unit 130 is operated to keep the temperature of the ink below the set temperature, At this time, if necessary, the operation of the ultrasonic vibration unit 140 in operation is suspended, and the operation of the ultrasonic vibration unit 140 can be resumed when the temperature of the ink stably remains below the preset temperature.

Next, the printing apparatus of the present invention removes the ink in the reservoir 110 during the cleaning operation of the pattern roll. At this time, the ink in the reservoir 110 operates the valve 151 without operating the circulation pump 160 The ink can be removed by opening only the return line connected to the ink storage part 150 to naturally discharge the ink.

After the ink in the reservoir 110 is discharged, the circulation pump 160 is operated to supply the cleaning liquid stored in the cleaning liquid storage unit 170 to the storage tank 110. The ultrasonic vibration unit 140 Can be operated to remove the residual ink of the pattern roll 10.

As described above, the printing apparatus of the present invention is advantageous in that the pattern roll can be cleaned in a state in which the pattern roll is mounted on the apparatus without being separated from the printing apparatus, and the pattern roll cleaning operation can be conveniently performed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

10: pattern roll 20: push roll
30: Doctor blade 110: Storage tank
120: temperature detector 130: temperature controller
140: ultrasonic vibration part 150: ink storage part
160: Circulation pump 170: Washing liquid storage part
180: switching valve 151, 171: check valve
200:

Claims (9)

A roll-to-roll gravure printing apparatus comprising a pattern roll having a printing pattern formed on an outer circumferential surface thereof and a pushing roll rotated together with the pattern roll,
A reservoir in which the ink or the cleaning liquid is stored so that a part of the pattern roll is immersed;
A temperature detector disposed in the reservoir to detect a temperature;
A temperature controller for controlling the temperature of the storage tank;
An ultrasonic vibrator for generating ultrasonic waves in the reservoir;
And a control unit controlling the operation of the temperature regulating unit or the ultrasonic vibrating unit according to the temperature detected by the temperature detecting unit. The ink jet recording apparatus according to claim 1, further comprising: an ink storage portion to which ink is supplied;
And a circulation pump circulating the ink in the ink reservoir to the reservoir. The cleaning apparatus according to claim 2, further comprising: a cleaning liquid storage unit for supplying the cleaning liquid;
And a switching valve for switching the flow path so as to selectively circulate and supply the cleaning liquid in the cleaning liquid storage portion to the storage tank by the circulation pump. 3. The apparatus according to claim 2, wherein the ink return line between the reservoir and the ink reservoir is provided with a check valve for preventing back flow of the ink. The apparatus as claimed in claim 3, wherein a check valve is provided on the cleaning liquid return line between the storage tank and the cleaning liquid storage unit to prevent backwash of the cleaning liquid. Wherein ultrasonic waves are generated in a storage tank in which ink is stored so that a part of the pattern roll is immersed, and the ink in the reservoir is circulated to stir the ink transferred to the pattern roll. 7. The method according to claim 6, wherein the temperature in the reservoir is detected and the reservoir is cooled so that the temperature is kept below the set temperature. A pressure roll which is rotated together with the pattern roll, a storage tank in which the ink or the cleaning liquid is stored so that a part of the pattern roll is immersed, a temperature detection unit which is provided in the storage tank and detects the temperature, A circulation pump for circulating the ink in the ink reservoir to the reservoir, and a circulation pump for circulating and circulating the ink in the reservoir through the reservoir, And a controller for controlling the operation of the temperature controller or the ultrasonic vibrator according to the temperature detected by the temperature detector,
Wherein the control unit operates the ultrasonic vibration unit during the printing process to generate ultrasonic waves in the ink in the reservoir and circulates the ink through the reservoir and the ink reservoir by operating the circulation pump . 9. The ink jet recording apparatus according to claim 8, wherein the control unit compares the detection signal transmitted from the temperature detector, and when the detected temperature is equal to or higher than the set temperature, operates the temperature controller to maintain the ink in the reservoir below the set temperature Roll to roll gravure printing method.
KR1020140090365A 2014-07-17 2014-07-17 Gravure printing apparatus, and printing method utilizing the same KR20160010710A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200024565A (en) * 2018-08-28 2020-03-09 건국대학교 산학협력단 Flexible Large Area Temperature Sensor Making System Using Rollto-Roll
KR102440563B1 (en) * 2022-05-12 2022-09-06 김남파 Gravure printing device capable of automatic alignment of low-depth laser copper plates and eco-friendly ink saving
KR102545259B1 (en) * 2022-12-08 2023-06-20 주식회사 나우스 Method for manufacturing low basis weight water-soluble coated wrap paper and water-soluble coated wrap paper produced through the method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004098557A (en) 2002-09-11 2004-04-02 Think Laboratory Co Ltd Gravure printing method and apparatus using aqueous ink
KR20100002405A (en) 2008-06-30 2010-01-07 건국대학교 산학협력단 Cleaning apparatus of gravure roll under printing process
KR101179381B1 (en) 2010-12-20 2012-09-03 삼성전기주식회사 Gravure printing apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004098557A (en) 2002-09-11 2004-04-02 Think Laboratory Co Ltd Gravure printing method and apparatus using aqueous ink
KR20100002405A (en) 2008-06-30 2010-01-07 건국대학교 산학협력단 Cleaning apparatus of gravure roll under printing process
KR101179381B1 (en) 2010-12-20 2012-09-03 삼성전기주식회사 Gravure printing apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200024565A (en) * 2018-08-28 2020-03-09 건국대학교 산학협력단 Flexible Large Area Temperature Sensor Making System Using Rollto-Roll
KR102440563B1 (en) * 2022-05-12 2022-09-06 김남파 Gravure printing device capable of automatic alignment of low-depth laser copper plates and eco-friendly ink saving
KR102545259B1 (en) * 2022-12-08 2023-06-20 주식회사 나우스 Method for manufacturing low basis weight water-soluble coated wrap paper and water-soluble coated wrap paper produced through the method

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