JP2015205436A - Photogravure offset printer and printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer and a printing method which enable stable printing of high definition narrow lines.SOLUTION: A printer includes: an intaglio plate in which a recess pattern is formed; a first surface plate on which the intaglio plate is placed; a suction pump for fixing the intaglio plate which suctions air between the first surface plate and the intaglio plate and fixes the intaglio plate to the first surface plate; an actuator which vertically moves the first surface plate; and a second surface plate which encloses the first surface plate.

Description

  The present invention relates to a printing apparatus and a printing method for stably printing a wide range of high-viscosity coating materials such as various inks, resins, and conductive pastes on a surface of a printing object with high resolution and high dimensional accuracy. is there. Specifically, for the purpose of printing such as IC card antenna (coiled pattern), solar battery back sheet conductive wiring, radio wave shield, touch panel wiring, etc., conductive ink, conductive on a sheet of PET, PEN, acrylic, etc. The present invention relates to a gravure offset printing machine specification used for printing a paste or the like on a high-thin line in a wide area.

In recent years, a gravure offset printing method has been used for industrial product printing in various fields (see Patent Document 1). In this method, the ink is inserted and scraped in a desired concave pattern with a doctor or scraper in advance, and a transfer body having an ink-peelable transfer layer on the surface is contacted on a plate filled with ink in the concave pattern. And patterning the ink film on the transfer body by transferring the ink film onto the transfer body, forming the ink film according to an appropriate film thickness distribution, and pressing the transfer body onto the substrate And a step of transferring the pattern of the ink film remaining on the transfer body to the printing body, and having a high viscosity of various inks, resins, conductive pastes, etc. on the surface of the printing object. It is required to print a coating material over a wide range with high resolution and high dimensional accuracy.
In the above method, a gravure plate formed with high fine lines is necessary, and a fine concave pattern formed on the surface of glass, resin or metal plate is used.

  In order to print a fine pattern over a wide range by gravure offset printing, a plate having a uniform and stable surface over a wide range and a surface plate capable of fixing the surface uniformly are necessary.

  In order to perform uniform and stable high-definition fine line printing over a wide area, it is necessary to transfer the ink filled in the desired concave pattern uniformly and uniformly on the transfer body having the ink-peeling transfer layer. Necessary.

  For this purpose, an intaglio having uniform surface accuracy over a wide range as described above and a surface plate for uniformly fixing the surface are required.

  In addition, it is necessary to uniformly fill the recess pattern with ink uniformly as a pre-transfer process. For this purpose, a smooth intaglio with no step and a surface plate for fixing it are necessary for inserting and scrubbing ink into a desired concave pattern with a doctor or a squeegee.

  As a result, high-definition fine line printing that is stable over a wide range and printing that does not have excessive ink coverage and stains in the effective printing range are possible.

  The current gravure offset printing method uses glass, resin, or metal with limited plate making size to print a wide range of stable, high-definition fine lines on a wide, large area substrate. When fixed, the plate cannot be fixed without any difference in level from the surface plate, resulting in extra ink coverage around the plate.

Japanese Patent Publication No.2-246679

  The present invention has been made in order to solve the problems occurring in a plate having a uniform and stable surface over a wide area and a surface plate capable of fixing the surface uniformly. In gravure offset printing, a high-definition fine line is provided. It is an object of the present invention to provide a printing apparatus and a printing method capable of stably printing the image.

  One aspect of the present invention that solves the above problem is that an intaglio with a concave pattern formed thereon, a first surface plate on which the intaglio is placed, and air between the first surface plate and the intaglio are sucked into the first intaglio. A gravure offset printing apparatus comprising a suction pump for fixing an intaglio to be fixed to a surface plate, an actuator capable of moving the first surface plate up and down, and a second surface plate surrounding the first surface plate.

  The actuator may be able to match the upper surface height of the intaglio and the upper surface height of the second surface plate by moving the first surface plate up and down.

  An air discharge pump and a conduit path for guiding the air discharged from the discharge pump to the gap between the intaglio and the second surface plate may be further provided, and the ink adhered to the gap may be blown out by the air from the discharge pump.

  A suction pump connected to the conduit path may be further provided, and the ink adhering to the gap may be sucked with air from the suction pump.

  The actuator may be capable of making the upper surface height of the intaglio higher than the upper surface height of the second surface plate by moving the first surface plate up and down.

  Another aspect of the present invention is a gravure offset printing method using the above-described gravure offset printing apparatus, which includes a step of suction-fixing an intaglio to a first surface plate by an intaglio fixing vacuum pump, and an actuator. Adjusting the upper surface height of the first surface plate, matching the upper surface height of the intaglio and the upper surface height of the second surface plate, and coating the ink on the upper surface of the intaglio and the upper surface of the second surface plate, The step of blowing out the ink adhering to the gap between the intaglio and the second surface plate using a discharge pump, and scraping the ink on the upper surface of the intaglio and the upper surface of the second platen by scraping, then the gap between the intaglio and the second platen A gravure offset printing method, including a step of sucking ink adhering to the surface of the intaglio plate using a suction pump and a step of rolling the transfer body on the upper surface of the intaglio plate after making the upper surface height of the intaglio plate higher than the height of the upper surface of the second platen. is there.

  According to the present invention, ink such as a high-viscosity resin can be stably printed with high-definition fine lines.

  In addition, the cost can be greatly reduced by incorporating the minimum size plate and reusing the auxiliary suction frame.

Schematic sectional view of a gravure offset printing apparatus according to the present invention Schematic plan view of a gravure offset printing apparatus according to the present invention Process schematic diagram of gravure offset printing method according to the present invention Process schematic diagram of gravure offset printing method according to the present invention Process schematic diagram of gravure offset printing method according to the present invention Process schematic diagram of gravure offset printing method according to the present invention Process schematic diagram of gravure offset printing method according to the present invention Process schematic diagram of gravure offset printing method according to the present invention Process schematic diagram of gravure offset printing method according to the present invention Process schematic diagram of gravure offset printing method according to the present invention Process schematic diagram of gravure offset printing method according to the present invention Process schematic diagram of gravure offset printing method according to the present invention Process schematic diagram of gravure offset printing method according to the present invention Outline appearance of gravure offset printing press according to the prior art Schematic of gravure offset printing method according to the prior art Process schematic of gravure offset printing method according to the prior art Process schematic of gravure offset printing method according to the prior art Process schematic of gravure offset printing method according to the prior art Schematic sectional view of intaglio for gravure offset printing according to the prior art

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

FIG. 14 schematically shows a gravure offset printing apparatus 100 according to the prior art.
The gravure offset printing apparatus 100 includes an intaglio plate 102 on which a concave pattern 101 is formed, a surface plate 103 that fixes the concave plate 102, a doctor or squeegee 104 that inserts and scrapes the ink 110 into the concave pattern 101, and the ink 110 in the concave pattern 101. A transfer body 105 to be peeled off, a printing body 107 on which the ink 106 peeled off by the transfer body 105 is printed, and a surface plate 108 for fixing the printing body 107 are included. Further, a fine line pattern 109 is formed on the printing medium 107 by printing.

  For the intaglio plate 102, a flat plate made of glass, resin or metal is used. The concave pattern 101 is a groove having a width of 10 μm to several mm and a depth of 5 μm to 20 μm formed on the intaglio plate 102. For the formation of the concave pattern 101, a method such as etching or laser is used. For the ink 110, a conductive paste, resin, or the like is used. Steel or resin is used as the material of the squeegee 104. As shown in FIGS. 14 and 15, the transfer body 105 has an ink releasability, and is formed by forming a transfer layer in a cylindrical shape that can stably peel the ink 110 while rolling at a constant pressure.

  As shown in FIG. 15, the transfer body 105 rotates in the direction of the arrow on the intaglio plate 102, so that the ink 110 in the recess pattern 101 is peeled off and then rolled to the surface plate 108 side to which the printing body 107 is fixed. Then, the ink 106 remaining on the transfer body 105 is printed on the printing medium 107 with a constant pressure. Thereby, a fine line pattern 109 printed with the same shape as the concave pattern 101 is obtained.

  FIG. 15 shows a printing medium using ink 110 inserted and scraped by a doctor or squeegee 104 in a concave pattern 101 of an intaglio plate 102 using a printing method according to the prior art shown in FIG. The process of printing on 107 is shown as viewed from the side. This is shown in the manner of rolling the transfer body 105 from right to left in FIG.

  FIG. 16 is a schematic diagram of processes performed on the surface plate 103 on which the existing gravure offset printing intaglio 102 on the right side of FIG. 15 is fixed, and a doctor or squeegee 104 is shown on the intaglio plate 102 fixed on the surface plate 103. 16 shows a process of moving the surface of the intaglio 102 from left to right and inserting and scraping the ink 110 into the recess pattern 101 carved in the intaglio 102.

  FIG. 17 shows a state in which the ink 110 is inserted into the concave pattern 101 by scraping after the step of FIG. 16 and the ink 110 is hardly left on the surface of the intaglio plate 102 other than the concave pattern 101. is there.

  18, the ink 110 inserted in the concave pattern 101 of the intaglio 102 in the process of FIG. 16 is rolled with the transfer body 105 from the right side to the left side of FIG. This shows the process of peeling off from the intaglio plate 102 to make the ink 106 remaining on the transfer body 105.

  FIG. 19 is a schematic cross-sectional view of the intaglio 102 formed of metal, glass, or resin and having a flat surface as viewed from the side.

Based on the above-described conventional technology, an embodiment of the present invention will be described below. Constituent elements that can be contrasted with the above-described constituent elements have the same reference numerals.
FIG. 1 is a schematic cross-sectional view showing the main structure of an intaglio fixing device 201 that is a part of a gravure offset printing apparatus 200 according to the present invention, in which an intaglio 102 is incorporated from above.
The intaglio fixing device 201 is made of a fixed surface plate 701 (second surface) which is made of granite, cast metal, aluminum, stainless steel or the like into a shape that ensures rigidity, and has a level and smoothness by cutting and polishing the upper surface. (The surface plate) (hereinafter referred to as the surface plate 701), the movable surface plate 702 (first surface plate) having a suction function near the center and movable up and down, and the movable surface plate 702 can be moved up and down. An actuator 704 using a motor drive, a platen 701 and an intaglio gap 1203 for sucking the ink 110 to a necessary place, and a conduit path 703 that connects a blowout pump 1202 and a suction pump 1601 described later.

FIG. 2 is a schematic plan view of the intaglio fixing device 201 as viewed from above.
The conduit path 703 is formed inside the surface plate 701, and connects the surface plate 701 and the intaglio gap 1203 to a later-described blowing pump 1202 and suction pump 1601. Below the movable surface plate 702, an actuator 704 capable of moving the movable surface plate 702 up and down is disposed. The conduit path 703 includes a path 705 having a blowing pump 1202, a suction pump 1601, and a filter 1602.

  FIG. 3 shows a state in which the movable surface plate 702 is lifted upward by the actuator 704 from the state of FIG.

  In FIG. 4, after placing the intaglio plate 102 on the movable platen 702 from the upper side of FIG. 3, the air between the movable platen 702 and the intaglio plate 102 is sucked by the suction pump 1001 from the lower side of the intaglio plate 102 to move the intaglio plate The process of fixing to the surface plate 702 is shown.

  FIG. 5 shows that the upper surface level of the intaglio plate 102 finally fixed by operating the actuator 704 so that the upper surface level of the fixed intaglio plate 102 matches the upper surface level of the surface plate 701 by the process of FIG. FIG. 4 shows a state in which the upper surface level of the surface plate 701 coincides.

  FIG. 6 shows a process of coating ink on the upper surface of the intaglio 102 and the upper surface of the surface plate 701 finally fixed in FIG. The coating doctor 1201 and the ink 110 are arranged at the edge of the surface plate, and the inking plate 102 is coated with the ink 110 by moving the coating doctor 1201 from the left to the right in FIG. At this time, in order to prevent the ink 110 from entering the gap 1203 between the intaglio plate 102 and the surface plate 701, the periphery of the intaglio plate 102 (the gap between the intaglio plate 102 and the movable platen 702) is used using the conduit path 703. 1203) Air (gas such as air) is blown out from the whole.

  FIG. 7 shows a state after the coating doctor 1201 has moved from the state of FIG. 6 from the left to the right of FIG. Since air is blown out from the entire periphery of the intaglio plate 102 (gap 1203), the ink 110 does not enter the gap 1203.

  FIG. 8 shows the ink 110 coated on the upper surface of the intaglio plate 102 and the upper surface of the surface plate 701 in FIG. 7 immediately before the doctor 104 moves the ink from right to left in FIG. Is shown. In this step, air is not blown out from the entire periphery of the intaglio plate 102 using the duct path 703 and the blowing pump 1202 in order to prevent the ink 110 from being scattered by the air blowing from below while the doctor 104 is moving. .

  FIG. 9 shows a state after the upper surface of the intaglio plate 102 and the upper surface of the surface plate 701 in FIG. 8 are moved by the doctor 104 from the right to the left in FIG. 9 while applying a constant pressing pressure from the upper side to the lower side. In this process, the ink 110 is filled into the recess pattern 101 formed on the intaglio plate 102 by scraping, and the ink enters the gap 1203.

  FIG. 10 shows that the suction pump 1601 is operated to remove the ink that has entered the gap 1203 in the process performed in FIG. 9 from the entire periphery of the intaglio plate 102, and the ink is removed by the filter 1602 installed on the way through the conduit path 703. The process is shown.

  FIG. 11 shows that the intaglio 102 and the movable surface plate 702 are higher than the upper surface level of the surface plate 701 while the suction pump 1601 for removing ink from the entire periphery of the intaglio plate 102 is operated after the process performed in FIG. A state where the actuator 704 is lifted at the position is shown.

  FIG. 12 shows a process in which the lowermost part of the transfer body 105 is arranged at a position in contact with the height of the upper surface of the intaglio plate 102 in the state shown in FIG. 11 and moved while rotating from left to right in FIG.

  FIG. 13 shows a state in which the ink 110 that has been filled by scraping into the concave pattern 101 formed on the intaglio plate 102 is transferred to the surface of the transfer body 105 after the process of FIG.

  After the step of FIG. 13, the printing is completed through the steps shown on the left side of FIG. By transferring the transfer body 105 from the center of FIG. 15 to the left side with constant contact on the surface plate 108 to which the printing body 107 is fixed, the ink 110 transferred to the surface of the transfer body 105 is retransferred to the surface of the printing body 107 ( Printing).

  From the above, according to the present invention, it is possible to stably print an ink such as a high-viscosity resin with high-definition fine lines. In addition, it is expensive to make a large plate, but by fixing the small size intaglio to the suction auxiliary frame mounted on the suction surface plate, the smallest size plate is incorporated, and the suction auxiliary frame is reinstated. By using it, the cost can be greatly reduced.

  Using the gravure offset printing apparatus 200 according to the present invention, an intaglio pattern 101 having a conductor part width of 20 μm formed on the intaglio 102 is printed as a conductive silver paste as an ink 110 on a PET substrate which is a printing medium 107. did.

  A metal plate of 630 mm long, 530 mm wide, 0.3 mm high, and a flatness of in-plane flatness of ± 5 μm or less is used as an intaglio plate 102, and a groove having a width of 20 μm and a depth of 10 μm is formed into a lattice shape in a lattice shape of 500 mm long × 500 mm wide The one engraved on the entire surface was used.

  A PET substrate having a thickness of 125 μm and a length of 600 mm × width of 600 mm was used for the printing medium 107. For the ink 110, a conductive silver paste of 9.5 Pa · s was used at an angular velocity of 10 rad / sec with a rheology measuring device. For the transfer member 105, a material having a rubber hardness (JIS A) of 45 ° to 60 ° and a rubber thickness of 0.6 mm, which is mainly made of silicon rubber, is wound around a cylinder. The doctor or squeegee 104 is used as MDC. A regular type of doctor blade was used.

  First, the intaglio plate 102 was fixed by suction to the movable surface plate 702 at the center of the surface plate 701, and the PET substrate as the printing medium 107 was fixed to the other surface plate 108. Next, in order to adjust the contact amount between the transfer body 105 and the intaglio plate 102, the movable surface plate 702 to which the intaglio plate 102 was fixed was placed at a position higher than the height of the upper surface of the surface plate 701. Next, the actuator 704 is operated so that the upper surface level of the fixed intaglio plate 102 matches the upper surface level of the surface plate 701, and the upper surface level of the finally fixed intaglio plate 102 becomes the upper surface level of the surface plate 701. Confirmed that they matched. At this time, the difference between the upper surface level of the intaglio 102 and the upper surface level of the surface plate 701 was 5 μm or less. Next, in order to coat ink on the upper surface of the fixed intaglio plate 102 and the upper surface of the surface plate 701, a certain gap was formed between the intaglio plate 102 and the upper surface of the surface plate 701. At this time, the speed at which the doctor 104 inserts and scrapes the ink 110 into the concave pattern 101, the peripheral speed at which the ink peelable transfer body 105 rolls on the intaglio plate 102, and the ink peelable transfer body 105 rolls on the PET substrate. The peripheral speed was set as 50 mm / sec.

  Next, a PET base material that is the printing medium 107 was placed on the surface plate 108.

  In order to coat ink on the upper surface of the fixed intaglio plate 102 and the surface plate 701 as shown in FIG. 6, the coating doctor 1201 and the ink 110 are arranged at the end of the surface plate 701 as shown on the left in FIG. 1201 was moved to coat the intaglio plate 102 and the surface plate 701 with the ink 110 having a certain thickness. At this time, for the purpose of preventing the ink 110 from entering the gap 1203, air was blown out from the entire periphery of the intaglio plate 102 using the conduit path 703 and the blowing pump 1202.

  In the manner shown in FIG. 8, the ink 110 coated with ink on the upper surface of the intaglio plate 102 and the upper surface of the surface plate 701 was moved by the doctor 104 while applying a constant pressing pressure from above to below. At this time, the air from the entire periphery of the intaglio 102 was not blown out using the blowout pump 1202 using the conduit path 703.

  In order to remove the ink that has entered the gap 1203 from the entire periphery of the intaglio plate 102 as shown in FIG. 10, the suction pump 1601 is operated to remove the ink with the filter 1602 installed on the way through the conduit path 703, and the entire periphery of the intaglio plate 102 is removed. The ink was removed from.

  As shown in FIG. 11, the intaglio 102 and the movable surface plate 702 are moved to a position higher than the upper surface level of the surface plate 701 by the actuator 704 while the suction pump 1601 for removing ink from the entire periphery of the intaglio plate 102 is operated. It was in a state that was raised.

  As shown in FIG. 12, the lowermost portion of the transfer body 105 was placed at a position in contact with the height of the upper surface of the intaglio plate 102 and moved while rotating.

  The ink 110 that has been filled by scraping into the concave pattern 101 formed on the intaglio plate 102 is transferred to the surface of the transfer body 105 as shown in FIG. 13, and the ink 106 is transferred as shown in FIG. The ink 105 transferred to the surface of the transfer body 105 could be retransferred to the surface of the printing body 107 by rolling the body 105 on the printing body 107 with a certain contact.

  As a result, a lattice pattern of length 500 mm × width 500 mm of intaglio part pattern width 20 μm and depth 10 μm formed on an intaglio plate of length 630 mm × width 530 mm on a PET substrate having a thickness of 125 μm, length 600 mm × width 600 mm has a line width of It was printed uniformly and stably at 20 μm ± 2 μm, and could be printed in a state in which there was no extra pattern or stain on the effective printing range of the PET base material of 600 mm × 600 mm.

  According to the present invention, it is possible to print wiring patterns related to electronic devices with stable quality.

  According to the present invention, it is possible to easily form a circuit such as a conductive wire layer or an insulating layer related to an electronic device.

DESCRIPTION OF SYMBOLS 100,200 Gravure offset printing apparatus 201 Intaglio fixing apparatus 101 Recessed pattern 102 Intaglio 103 Surface plate 104 Doctor or squeegee 106 Ink remaining on transfer body 105 Ink-peelable transfer body 107 Printed body 108 Surface plate 109 on which the print body is fixed Printed fine line pattern 110 Ink 701 Surface plate (fixed surface plate)
702 Movable platen 703 Conduit path 704 Actuator 705 path 1001 Suction pump 1201 Coating doctor 1202 Blow pump 1203 Gap 1601 Suction pump 1602 Filter

Claims (6)

An intaglio with a concave pattern formed thereon;
A first surface plate on which the intaglio is placed;
A suction pump for intaglio fixing that sucks air between the first platen and the intaglio and fixes the intaglio to the first platen;
An actuator capable of moving up and down the first surface plate;
A gravure offset printing apparatus comprising: a second surface plate surrounding the first surface plate.   2. The gravure offset according to claim 1, wherein the actuator can make the upper surface height of the intaglio and the upper surface height of the second surface plate coincide with each other by moving the first surface plate up and down. Printing device. An air discharge pump;
A conduit path for guiding the air discharged from the discharge pump to the gap between the intaglio and the second surface plate,
The gravure offset printing apparatus according to claim 2, wherein the ink attached to the gap is blown out by air from the discharge pump. A suction pump connected to the conduit path;
The gravure offset printing apparatus according to claim 3, wherein the ink attached to the gap is sucked with air from the suction pump.   5. The gravure offset according to claim 4, wherein the actuator moves the first surface plate up and down to make the upper surface height of the intaglio higher than the upper surface height of the second surface plate. Printing device. A gravure offset printing method using the gravure offset printing apparatus according to claim 5,
A step of adsorbing and fixing the intaglio to the first surface plate by a suction pump for intaglio fixing;
Adjusting the upper surface height of the first surface plate with an actuator, and matching the upper surface height of the intaglio and the upper surface height of the second surface plate;
After coating ink on the upper surface of the intaglio and the upper surface of the second platen, the step of blowing out the ink adhered to the gap between the intaglio and the second platen using a discharge pump;
Scraping ink on the upper surface of the intaglio and the upper surface of the second platen by scraping, and then sucking the ink adhering to the gap between the intaglio and the second platen using a suction pump;
A gravure offset printing method comprising: a step of rolling the transfer body on the upper surface of the intaglio plate after making the upper surface height of the intaglio plate higher than the height of the upper surface of the second surface plate.

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