KR100726419B1 - Printer - Google Patents

Abstract

A printer is provided to prevent deformation of a print sheet as well as improve print quality and increase stability of a print process. A printer includes a gravure roll, a dispenser, a doctor blade, a blanket roll(40), a work stage, a work table, and a lower base. The gravure roll is installed in the printer. The dispenser applies one color photoresist among red, green and blue color photoresist onto an outer surface of the gravure roll. The doctor blade removes an unnecessary photoresist of the photoresist applied onto the outer surface of the gravure roll. The blanket roll prints any one pattern of the red, green and blue patterns onto a substrate. The work stage allows any one pattern print operation to be performed on the substrate. The work table conveys the substrate onto the work stage. The lower base supports the work table and the work stage.

Description

Print Device {Printer}

1 is a schematic side view of a printing apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged view of the main region of FIG. 1. FIG.

3 is a schematic perspective view illustrating main parts of FIG. 2;

4 is a bottom perspective view of the drying unit of FIG. 3.

* Explanation of symbols for the main parts of the drawings

    1: printing apparatus 10: frame

   11: Gravure Roll 13: Doctor Blade

   20: drying unit 20a: outer cabinet

   21: drying duct 22: air sprayer

   23: air supply line 24: blower

   25: exhaust duct 26: exhaust hole

   27: exhaust line 28: exhaust pump

   29: heat generating unit, infrared lamp 30: cleaning unit

   31: first cleaning roll 33: second cleaning roll

   40: blanket roll 41: printing sheet

   43: sheet replacement means 50: the work stage

   60: lower base 70: work table

The present invention relates to a printing apparatus, and more particularly, to a printing apparatus capable of efficiently drying and cleaning a printing sheet wound on a blanket roll, thereby improving print quality and process stability.

Recently, as the electronic display industry has developed rapidly among the semiconductor industry, flat panel displays (FPDs) have started to appear. Flat panel displays are commonly used as monitors for TVs or computers, or as display devices for devices such as mobile phones, PDAs, and digital cameras. Types of flat panel displays include liquid crystal displays (LCDs), plasma display panels (PDPs), and organic light emitting diodes (OLEDs).

Generally, a color filter (CF) layer is formed on a flat panel display to implement colors. A black matrix is used to prevent light from leaking to areas other than the image display area, thereby degrading the image quality of the display device. A color filter having a black matrix is provided.

A typical flat panel display having such a color filter is the LCD described above. The LCD includes a thin film transistor (TFT) substrate on which a thin film transistor is formed, a color filter (CF) substrate on which a color filter layer is formed, and a liquid crystal (LC) filled between the substrates.

In the color filter layer, pixels having dyes of R (Red), G (Green), and B (Blue) patterns are usually formed. Each pixel may consist of sub-pixels having R, G, and B, but in general, each pixel has one pigment.

In forming the color filter layer, the R, G, and B patterns may be regularly arranged in a row such that the R, G, and B patterns are arranged in the same column, respectively (RGB Vertical Stripe), and the R, G, and B patterns may be arranged in the same row. It can also be arranged repeatedly (Mosaic). As such, the difference in resolution may be variously implemented according to various arrangements of R, G, and B patterns.

Such a color filter layer can be produced by various methods, for example, dyeing, printing, electrodeposition, pigment dispersion. STN (Super Twisted Nematic) LCD, which is one of the conventional passive matrix methods, mainly produces color filter layers by dyeing, printing, and adhesive methods, but it is an active matrix method that has excellent elaboration, good reproducibility, and is applicable to large-area liquid crystals. In TFT (Thin Film Transistor) LCD, pigment dispersion method is mainly used.

In the pigment dispersion method, a color filter layer is manufactured by forming a pattern of photosensitive color resists by a general photolithography process. That is, the color filter layer is completed by coating a photosensitive color resist on a substrate, irradiating light using a mask, and then applying a developer to form a desired pattern.

As such, a photo process is required to form a color filter by the pigment dispersion method, and this photo process causes a problem that not only the process is complicated but also requires a lot of manufacturing cost. Furthermore, the process is further complicated since the photo process must be repeated three times in order to form pixels corresponding to the dyes of the R, G, and B patterns.

Recently, a method of using the printing method in the TFT LCD field has been proposed to overcome the problems of the pigment dispersion method.

The printing method has a gravure filled with color resist and a corresponding roll to form a color resist pattern of the corresponding dye on the substrate by the action of a roll, and then another color color resist by another roll. To form sequentially. If such a printing method can be put into practical use, the process of manufacturing color filter layers by printing R, G, and B patterns on a substrate can be performed more quickly and effectively. It is not. Therefore, research and development on such a device is actively in progress.

Rolls used in correspondence with gravure in such a printing apparatus are commonly referred to as blanket rolls. A sheet is wound around the outer edge of the blanket roll, and the color resist is transferred from gravure (flat or roll form) to the printing sheet, and the color is transferred to the printing sheet as the blanket roll contacts and rotates the surface of the substrate. The resist is printed on the surface of the substrate.

On the other hand, the printing sheet wound and used on the outer circumference of the blanket roll may be mainly made of a rubber material such as urethane rubber or silicone rubber. If the color resist is transferred from gravure to the printing sheet of the rubber material, the printing sheet may absorb the solvent in the color resist and cause deformation such as expansion.

In addition, the printing sheet is not used only once but can be reused by repeating the process of transferring the color resist transferred from gravure to the surface of the substrate during the printing process. Therefore, the surface of the printing sheet must be transferred to the substrate and foreign substances such as the remaining color resist must be removed, so that the printing sheet can transfer the new color resist from the gravure and print it again on the substrate.

In this aspect, when deformation occurs in the printing sheet or foreign matter remains on the surface of the printing sheet, repeated printing may cause a problem that the printing pattern is deformed or the film thickness of the printing pattern is uneven.

Therefore, during the printing process, it is necessary to dry the printing sheet periodically to prevent deformation and to clean the surface of the printing sheet to prevent non-uniformity of the printing pattern.

Accordingly, it is an object of the present invention to provide a printing apparatus which can dry a printing sheet efficiently to prevent deformation of the printing sheet as well as to improve print quality and to improve the stability of the printing process. .

Another object of the present invention is to remove foreign matters and the like remaining on the surface of the printing sheet to prevent non-uniformity of the printing pattern, as well as to improve the printing quality and to improve the stability of the printing process To provide.

The object is, according to the present invention, a blanket roll in which a printing sheet to which color resist is transferred from gravure is wound on an outer surface thereof; And a drying part provided around the blanket roll to dry the printing sheet.

Here, the drying unit, a drying duct is formed therein a space in which the air (Air) flows, at least one air injection hole is formed on one side toward the blanket roll is injected with the air; A blower for generating the air; And an air supply line connecting the blower with the inner space of the drying duct so that the air generated by the blower is supplied to the inner space of the drying duct.

The drying duct may be formed long along the longitudinal direction of the blanket roll.

And the drying unit may further include a heat generating unit for emitting a predetermined heat toward the blanket roll.

Here, the heat generating unit may include at least one infrared lamp detachably coupled to one side of the drying duct.

On the other hand, further comprising an outer cabinet disposed to surround the blanket roll, the drying unit is provided on one side of the drying duct, the exhaust is formed with at least one exhaust hole for exhausting foreign matter gas remaining in the outer cabinet duct; An exhaust line having one end coupled to the exhaust duct and the other end exposed to the outside of the outer cabinet to form a passage through which the foreign gas is exhausted; And an exhaust pump coupled to the exhaust line to provide a suction force for exhausting the foreign gas.

The drying duct and the exhaust duct are arranged side by side along the length direction of the blanket roll, the exhaust duct of the exhaust duct may be disposed on both sides of the drying duct with the drying duct therebetween.

On the other hand, it may further include a cleaning unit provided around the blanket roll to clean the foreign material remaining on the surface of the printing sheet.

Here, the cleaning unit may include a first cleaning roll that adsorbs the foreign matter remaining on the surface of the printing sheet while rotating in contact with the blanket roll.

The cleaning unit may further include a second cleaning roll that rotates in contact with the first cleaning roll.

An adhesive layer for adsorbing the foreign material may be formed on an outer surface of at least one of the first and second cleaning rolls.

The first and second cleaning rolls may be disposed under the blanket roll.

The first and second cleaning rolls may have a diameter relatively smaller than the diameter of the blanket roll.

In addition, the above object is, according to the present invention, a blanket roll in which a printing sheet to which color resist is transferred from gravure is wound on an outer surface thereof; And a cleaning unit provided around the blanket roll to clean the foreign matter remaining on the surface of the printing sheet.

The cleaning unit may include: a first cleaning roll configured to adsorb foreign materials remaining on the surface of the printing sheet while rotating externally to the blanket roll; And a second cleaning roll that rotates in contact with the first cleaning roll.

An adhesive layer for adsorbing the foreign matter is formed on an outer surface of at least one of the first and second cleaning rolls, and the first and second cleaning rolls are disposed under the blanket roll, and the first And the second cleaning roll may have a diameter relatively smaller than the diameter of the blanket roll.

The gravure may be any one selected from a roll-shaped gravure roll and a plate-shaped gravure plate.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

1 is a schematic structural diagram of a printing apparatus according to an embodiment of the present invention.

As shown in this, the printing apparatus 1 according to an embodiment of the present invention, the gravure roll 11, the outer surface of the gravure roll 11 R (Red), G (Green), B (Blue) Dispenser 15 for applying any of the color resists (color ink, color pigment) and doctor blade for removing unnecessary color resists from the color resist applied to the outer surface of the gravure roll 11 (13, Dr. Blade) and any one of the R, G, and B color resists are transferred from the gravure roll 11 to the surface of the color filter substrate (hereinafter referred to as substrate G). Blanket roll 40 for printing any one of the B patterns, and a work stage 50 for printing at least one of R, G, and B patterns on the substrate G is performed. And a work table 70 for transferring the substrate G to the upper surface of the work stage 50, and supporting them. And a lower base (60).

Here, the drying unit 20 and the cleaning unit 30 are installed between the frame 10 and the work stage 50 to dry and clean the printing sheet 41 wound on the blanket roll 40. This will be described later.

The gravure roll 11 serves to transfer any color resist selected from R, G, and B color resists to the outer surface of the blanket roll 40. Thus, the gravure roll 11 and the blanket roll 40 have substantially similar volumes. The gravure roll 11 is rotatably mounted at the corresponding position by a pair of left and right frames 10 fixed to the lower base 60 and standing upright. The gravure roll 11 may be adjusted to some extent the eccentricity and the horizontal axis in the frame 10.

For reference, in printing the R, G, and B patterns on the substrate G, the R, G, and B patterns are not simultaneously printed on the substrate G through one printing apparatus 1. That is, in order to print the R, G, and B patterns on the substrate G, at least three printing apparatuses 1 according to the present embodiment may be required, and R, G, and B patterns may be used by the three printing apparatuses 1 These may be selected one by one and printed on the substrate (G).

Therefore, the dispenser 15 which first applies the color resist to the outer surface of the gravure roll 11 applies only one color resist selected from the R, G, and B color resists to the outer surface of the gravure roll 11. Expressed easily, the dispenser 15 applies only ink of any color selected from red, green, and blue to the outer surface of the gravure roll 11.

As shown in A enlarged in Fig. 1, the outer surface of the gravure roll 11 is formed with a pattern of concave-convex (11a, 11b) substantially covered (colored). At this time, the uneven pattern may be embossed or engraved. In the case of embossing, the color resist is applied to the outer surface of the protruding convex and concave portion (not shown) and transferred to the blanket roll 40. In the case of the intaglio form as shown in the present embodiment, the color resist is formed inside the recessed recess 11a. Is applied and transferred to the blanket roll 40.

However, when the blanket roll 40 receives the color resist from the outer surface of the gravure roll 11 and retransmits (prints) it to the substrate G to form the R, G, and B patterns, the surface of the substrate G is In order to maintain the thickness of the R, G, and B pattern uniformly, it may be advantageous that the uneven pattern formed on the outer surface of the gravure roll 11 has an intaglio shape.

When any of the color resists selected from R, G, and B color resists is applied to the outer surface of the gravure roll 11 by the dispenser 15, as shown in FIG. Color resist should be applied only to 11a). However, when the dispenser 15 applies the color resist to the outer surface of the gravure roll 11, it is difficult to apply the color resist at a time such that the color resist is selectively received only in the recesses 11a of the substantially intaglio shape.

Therefore, when the dispenser 15 applies the color resist to the outer surface of the gravure roll 11, the color resist is spread out and applied to all the outer surfaces of the gravure roll 11, and when the application is completed, the recess 11a of the intaglio shape is completed. By removing the unnecessary color resist applied to the remaining surface 11b, except that the color resist can be accommodated only inside the recess 11a. To this end, a doctor blade 13 is provided in the periphery of the gravure roll 11 to remove unnecessary color resist.

The doctor blade 13 includes a knife holder 13b and a knife 13a coupled to the knife holder 13b.

The knife 13a is arranged in parallel with the longitudinal direction of the gravure roll 11, and the color resist is applied while being in contact with the surface of the gravure roll 11 which rotates with the color resist applied (actually, there is a slight gap). Will be removed. That is, the knife 13a has a length substantially similar to the length of the gravure roll 11, and is disposed to be inclined with respect to the outer surface of the gravure roll 11 in a state where the tip thereof is in contact with the outer surface of the gravure roll 11. It serves to scratch the outer surface of (11).

Thus, since the front end of the knife 13a is in contact with the outer surface of the gravure roll 11, when the color resist is applied to the outer surface of the rotating gravure roll 11, the recessed portion 11a of the intaglio shape by the knife 13a The color resist applied to the remaining surface 11b except for may be naturally removed. Therefore, finally, as shown in B enlarged in FIG. 1, the color resist can be accommodated only in the recess 11a.

The dispenser 15 serves to apply color resist to the outer surface of the gravure roll 11 as described above. The dispenser 15 is not only provided to be movable along the longitudinal direction of the gravure roll 11, but is also provided to be able to be lifted or folded in one direction at the corresponding position. Therefore, the coating efficiency of the color resist can be improved, and interference with surrounding structures can be avoided.

The work stage 50 is a place where the printing operation of the R, G, and B patterns on the substrate G proceeds, and the work table 70 plays a role of transferring the substrate G to the work stage 50. do.

The blanket roll 40 transfers the color resist applied in the recess 11a formed on the outer surface of the gravure roll 11, more specifically, on the outer surface of the gravure roll 11, while rotating R, It serves as a substantial printing roll for printing G and B patterns.

The blanket roll 40 must be accessible and spaced apart from the gravure roll 11 as well as able to rotate on the top surface of the substrate G loaded on the work stage 50. To this end, both sides of the blanket roll 40 on the side rails 61 of the lower base 60 to move the blanket roll 40 in a linear direction, as well as to move the rotary roll to rotate the blanket roll 40 at the corresponding position ( 42). The structure for moving the blanket roll 40 in the moving rotation part 42 may be, for example, a linear motion or the like capable of precise control.

On the outer surface of the blanket roll 40, a printing sheet 41 to which color resist is transferred from the gravure roll 11 is wound. Of course, since the printing sheet 41 used as many times as the appropriate limit has to be replaced, the blanket roll 40 is further provided with sheet replacement means 43 for easily replacing the printing sheet 41. The sheet replacement means 43 is fixed to the printing sheet 41 so that the printing sheet 41 can be easily replaced while the printing sheet 41 is unfolded and stretched and wound on the outer surface of the blanket roll 40. It also serves to give tension. The sheet replacement means 43 is provided on one surface 40a cut off from the blanket roll 40.

On the other hand, when the printing sheet 41 is not used only once but wound on the blanket roll 40, the process of transferring the color resist transferred from the gravure roll 11 to the surface of the substrate G during the printing process is repeated. Can be reused many times. Accordingly, after the print sheet 41 transfers the color resist from the gravure roll 11 again, the print sheet 41 needs to clean foreign substances such as color resist remaining on the surface before transferring the color resist to the substrate G.

In addition, as described above, the printing sheet 41 mainly made of a rubber material such as urethane rubber or silicone rubber is a solvent in the color resist transferred from the gravure roll 11 when used by being wound on the blanket roll 40. Since there is a possibility that deformation, such as expansion, may occur by absorbing the film, after the blanket roll 40 transfers the color resist onto the substrate G, sufficient drying must be performed before the color resist is transferred from the gravure roll 11. .

In this respect, in order to solve the above problems, the printing apparatus 1 of the present embodiment includes a drying unit 20 and a cleaning unit 30 provided between the frame 10 and the work stage 50. At this time, the drying unit 20 for drying the printing sheet 41 is positioned in the upper region of the blanket roll 40, and the cleaning unit 30 for cleaning the printing sheet 41 is positioned in the lower region of the blanket roll 40. Done.

FIG. 2 is an enlarged view of the main region of FIG. 1, FIG. 3 is a schematic main perspective view of FIG. 2, and FIG. 4 is a bottom perspective view of the drying unit of FIG. 3.

As shown in these figures, the drying unit 20 serves to dry the printing sheet 41 so that the printing sheet 41 wound on the blanket roll 40 has a surface state suitable for the printing process. That is, it plays a role of drying the solvent etc. of the color resist which remained on the blanket roll 40 surface.

The drying unit 20 includes a drying duct 21 for supplying air to the printing sheet 41, a heat generating unit 29 for dissipating heat toward the printing sheet 41, and exhaust for exhausting air. The duct 25 is provided. The drying duct 21, the exhaust duct 25, and the printing sheet 41 are installed in the outer cabinet 20a forming their exterior, as shown in FIGS. 1 and 2.

The drying duct 21 serves to dry the printing sheet 41 by spraying air on the printing sheet 41 wound on the blanket roll 40. The drying duct 21 is provided with a plurality of air injection holes 22 (see FIG. 4) for injecting air toward the printing sheet 41, and the upper portion of the drying duct 21 is provided with an air supply line 23 and Are combined. The air supply line 23 may further include a pipe 23a having a predetermined length so as to be connected to a blower 24 for providing air.

The air supply line 23 is coupled to extend from the upper portion of the drying duct 21, and communicates with the inside of the drying duct 21 and also communicates with the air injection holes (22). As shown in FIG. 2 and FIG. 3, the air supply line 23 transfers the air generated by the blower 24 to the air injection hole 22 of the drying duct 21, as shown in FIG. 4. To pass. Therefore, the interior of the drying duct 21 has an empty space in which air flows and has a structure in which the air injection holes 22 communicate with each other.

And the plurality of air spraying holes 22, as shown in the enlarged view "A" in Figure 4, are arranged on the lower surface 21a of the drying duct 21 spaced apart from each other by a predetermined distance (printing sheet wound on the blanket roll 40 ( Air can be sprayed uniformly toward 41).

The blower 24 is coupled to the outer cabinet 20a so as to be positioned above the drying duct 21, and is connected to the air supply line 23 (in this embodiment, the pipe 23a is further provided). Air is supplied to the air spraying hole 22 through).

The drying duct 21 blows air toward the printing sheet 41 wound on the blanket roll 40 to dry the printing sheet 41. Even if the color resist is transferred to the dried print sheet 41, deformation of the print sheet 41 may be prevented due to a solvent or the like of the color resist. In addition, the drying duct 21 may be configured to be disposed in the longitudinal direction of the blanket roll 40 so as to have a length smaller than the length of the blanket roll 40 and may be dried while moving the surface of the blanket roll 40.

The heat generating unit 29 is coupled to the lower portion of the drying duct 21 serves to dry the printing sheet 41 more efficiently. As the heat generating unit 29, a heater having a heating wire or the like may be used, but in this embodiment, the infrared lamp 29 is used as the heat generating unit 29.

The infrared lamp 29 is located adjacent to the lower surface 21a of the drying duct 21 facing the blanket roll 40, as shown in FIG. 4, and in this embodiment five infrared lamps having the same size. (29) is detachably coupled to the drying duct 21 to have a constant arrangement. 4, the end 29a of the infrared lamp 29 is connected to a power supply (not shown) and may be configured to adjust the size and irradiation time of the infrared light.

In addition, the infrared lamp 29 may be manufactured to have a length corresponding to the length of the blanket roll 40 so as to uniformly irradiate the surface of the printing sheet 41 wound on the blanket roll 40, but the length of the blanket roll 40 may be reduced. In the case of large or small infrared lamps 29, the five infrared lamps 29 may be properly arranged to correspond to the length of the blanket roll 40 as in this embodiment.

At this time, the infrared ray used in the infrared lamp 29 may be used as the infrared ray having a specific wavelength range, if necessary, in the present embodiment is a medium infrared ray (MIR, Medium wave Infra Red) having a wavelength range of 2.0 ~ 4.0 μm Used. This is because the mid-infrared ray has a wavelength band that is most suitable for drying a coated metal or non-metal based product, and is known to have an excellent efficiency in drying an aqueous paint, a polymer resin (plastic), glass, and the like.

Therefore, in the present embodiment, when the infrared lamp 29 using the mid-infrared rays irradiates infrared rays toward the printing sheet 41, the moisture or the remaining color resist of the printing sheet 41 causes thermal radiation. Thermal radiation refers to a phenomenon in which a group of atoms constituting a material is excited by heat, resulting in radiation of electromagnetic waves. Thus, the printing sheet 41 is dried more effectively by the infrared lamp 29, Even if the color resist is transferred to the print sheet 41, it is possible to prevent the print sheet 41 from being deformed by a solvent or the like. The material thermally radiated from the printing sheet 41 is absorbed by the exhaust duct 25 and discharged to the outside.

The exhaust duct 25 absorbs foreign substances such as radiant heat and solvent generated when the surface of the printing sheet 41 is dried due to the above-described drying duct 21 and the infrared lamp 29 to the outside. It serves to exhaust.

In the present embodiment, two exhaust ducts 25 are disposed side by side on both sides of the drying duct 21 along the length direction of the blanket roll 40 with the drying ducts 21 interposed therebetween. And the upper part of the exhaust duct 25 is coupled to the exhaust line 27, the lower end of the exhaust duct 25, as shown in A enlarged in Figure 4, the long hole exhaust hole 26 is formed is formed have. The exhaust hole 26 communicates with the exhaust line 27. Therefore, when foreign matter gas such as radiant heat and solvent generated by the drying duct 21 and the infrared lamp 29 flows into the exhaust hole 26, it may be discharged to the outside through the exhaust line 27.

The exhaust line 27 has one end coupled to the exhaust duct 25 and the other end exposed to the outside of the outer cabinet 20a to form a passage through which foreign gas is exhausted and provide a suction force for exhausting the exhaust pump 28. Connected with The exhaust line 27 of the exhaust duct 25 may further include a pipe 27a having a constant length connected to the exhaust pump 28 as in the drying duct 21.

Such exhaust duct 25 is surrounded by an outer cabinet 20a, as shown in FIG. The outer cabinet 20a is disposed to surround the blanket roll 40 to form an exterior of the drying unit 20. That is, the outer cabinet 20a relatively covers the area of the blanket roll 40 so that the inside of the outer cabinet 20a forms a partially closed one drying chamber to increase the drying effect of the printing sheet 41.

The blanket roll 40 on which the printing sheet 41 is wound is rotated under the drying unit 20 so that other parts of the printing sheet 41 are dried so that the drying unit 20 is wound on the blanket roll 40. Overall drying of the sheet 41 can be carried out.

On the other hand, the cleaning unit 30 serves to clean the foreign matter such as photoresist and particles remaining on the printing sheet 41 wound on the blanket roll 40 from the surface of the printing sheet 41. In the present embodiment, the cleaning unit 30 includes a first cleaning roll 31 and a second cleaning roll 33.

The first cleaning roll 31 adsorbs foreign matter remaining on the surface of the printing sheet 41 while rotating externally with the blanket roll 40, and the second cleaning roll 33 contacts the first cleaning roll 31. And rotate. The first cleaning roll 31 and the second cleaning roll 33 are disposed under the blanket roll 40 and have a diameter relatively smaller than the diameter of the blanket roll 40. The pair of cleaning rolls 31 and 33 rotate in engagement with each other in directions R1 and R2.

When the cleaning unit 30 rotates, the above-described blanket roll 40 is rotated in one direction or both directions from the original position so that all parts of the printing sheet 41 can be cleaned. That is, during the cleaning and drying of the printing sheet 41, the blanket roll 40 is controlled to rotate in an appropriate range. For example, as shown by the arrow in FIG. 2, when the blanket roll 40 rotates in one direction R0, the first cleaning roll 31 in contact with the lower portion of the blanket roll 40 rotates in the rotational direction of the blanket roll 40 ( It rotates in the direction R1 opposite to R0, and the 2nd cleaning roll 33 rotates to the opposite direction R2 with the 1st cleaning roll 31. As shown in FIG.

At this time, an adhesive layer for adsorbing foreign substances is formed on the outer surface of at least one of the cleaning unit 30, that is, the first cleaning roll 31 and the second cleaning roll 33. That is, the pressure-sensitive adhesive layer may be made of a material such as silicone having strong adhesion, so as to wind the outer peripheral surfaces of the first cleaning roll 31 and the second cleaning roll 33, and the first cleaning roll 31 and the second cleaning. The roll 33 itself may be made of a strong adhesive material to form an adhesive layer. In this way, foreign matters such as color resist and particles of the printing sheet 41 wound on the blanket roll 40 may be adhered to the cleaning part 30 having the adhesive layer formed thereon.

In detail, the first cleaning roll 31 adheres foreign substances such as color resist and particles remaining from the printing sheet 41, and the second cleaning roll 33 which rotates in engagement with the first cleaning roll 31 is formed. The foreign matter adhered to the surface of the first cleaning roll 31 is again adhered. Therefore, the surface of the first cleaning roll 31 is restored to its original state, and the first cleaning roll 31 can maintain a clean state capable of absorbing foreign matters from the printing sheet 41 again.

Although not shown in the lower portion of the second cleaning roll 33, a cleaning means for cleaning the foreign matter on the surface of the second cleaning roll 33 is further provided, thereby restoring the surface of the second cleaning roll 33 to its original state. It would be desirable to maintain.

Since the cleaning unit 30 can remove foreign substances such as color resist and particles remaining on the printing sheet 41, the printing sheet 41 wound on the blanket roll 40 can be efficiently cleaned and printed. It can improve the quality and improve the stability of the printing process.

A series of operations of the printing apparatus having such a configuration and operations of the drying unit 20 and the cleaning unit 30 will be described sequentially.

First, the substrate G starts entering the work table 70 by a separate transfer device. Then, the air is injected through the plurality of air floating holes formed in the work table 70, so that the substrate G enters the work table 70 with a predetermined height floating upward from the upper surface of the work table 70. The substrate G entering the work table 70 may be aligned by an alignment part provided around the work table 70.

The substrate G floating on the upper surface of the work table 70 is transferred to the upper surface of the work stage 50 by a separate vacuum suction member. The vacuum suction member serves to transfer the substrate G to the work stage 50 in a state where the upper surface of the substrate G is adsorbed. At this time, since the air is also injected into the work stage 50, the substrate G transferred to the upper surface of the work stage 50 takes a state of being raised at a predetermined height from the upper surface of the work stage 50. Subsequently, when the process of spraying air is stopped, the substrate G is loaded onto the upper surface of the work stage 50. Then, as the air is adsorbed through the air line, the substrate G may be adsorbed on the upper surface of the work stage 50 to be fixed.

When the substrate G is fixed by being fixed on the upper surface of the work stage 50, the relative alignment process of the substrate G with respect to the blanket roll 40 is performed. That is, the alignment of the substrate G proceeds while the work stage 50 is moved to the X-axis, Y-axis, Z-axis, and θ-axis by the alignment portion provided below the work stage 50.

Next, the dispenser 15 applies one color resist selected from R, G, and B color resists to the outer surface of the gravure roll 11. At this time, since the tip of the knife 13a coupled to the knife holder 13b is in contact with the outer surface of the gravure roll 11, the knife 13a in the process of applying the color resist to the outer surface of the rotating gravure roll 11. By this, unnecessary color resist applied to the remaining surface 11b except for the recess 11a of the intaglio form is removed. Therefore, finally, the color resist is accommodated only in the recess 11a.

When the color resist is applied to the outer surface of the gravure roll 11, the blanket roll 40 is moved toward the gravure roll 11 by the moving rotation part 42. When the blanket roll 40 is moved to contact the gravure roll 11, the color resist applied to the outer surface of the gravure roll 11 by the relative rotation between the gravure roll 11 and the blanket roll 40 is intact the blanket roll ( 40 is transferred to the printing sheet 41 wound on the outer surface. After the color resist is transferred to the outer surface of the blanket roll 40, the blanket roll 40 is moved to the initial part of the work stage 50 by the moving rotation part 42 again.

Then, the blanket roll 40 prints any pattern selected from the R, G, and B patterns on the surface of the substrate G while moving and rotating the surface of the substrate G by the moving rotation part 42 (retransition). ) When the print job is completed, the blanket roll 40 is returned to its original position, and the substrate G having finished the print job is taken out and moved to another printing apparatus 1 for printing a different pattern among the R, G, and B patterns, and the above-mentioned. You repeat one process.

On the other hand, the printing sheet 41 wound and used on the outer circumference of the blanket roll 40 absorbs the solvent in the color resist transferred from the gravure roll 11, so that there is a high possibility that deformation such as expansion occurs. It is reused while repeating a printing process. When the printing sheet 41 is deformed or the cleaning of the printing sheet 41 is not performed, the printing pattern is deformed or the film thickness of the printing pattern is uneven.

In this aspect, the operation of the drying unit and the cleaning unit of the present invention for periodically drying the printing sheet or cleaning the surface thereof during the printing process will be described with reference to the drawings.

After the blanket roll 40 on which the printing sheet 41 is wound transfers the color resist onto the substrate G, before the color resist is transferred again from the gravure roll 11, the blanket roll on which the printing sheet 41 is wound As shown in FIG. 1, the 40 moves to an area where the drying unit 20 and the cleaning unit 30 are located.

First, as shown in FIG. 2, the drying unit 20 supplies the air to the surface of the printing sheet 41 by the drying duct 21, and the infrared lamp 29 irradiates infrared rays to blanket the roll 40. The printing sheet 41 wound on the roll is started to dry. At this time, while the print sheet 41 is dried, radiant heat and gas are generated in the outer cabinet 20a. The exhaust duct 25 absorbs radiant heat and gas inside the external cabinet 20a and exhausts it to the outside.

While the drying unit 20 performs the drying operation of the printing sheet 41, the blanket roll 40 is rotated in place, thereby uniformly drying the entire surface of the printing sheet 41.

On the other hand, the cleaning unit 30 serves to clean the foreign matter such as photoresist and particles remaining in the printing sheet 41 wound on the blanket roll 40 from the surface of the printing sheet 41, the drying unit 20 As the drying process of) proceeds, cleaning is performed at the same time.

That is, while the printing sheet 41 is dried on the upper portion of the blanket roll 40, as shown by the arrow in FIG. 2, when the blanket roll 40 rotates in one direction R0, the blanket roll 40 The first cleaning roll 31, which is in contact with the lower part, rotates in a direction R1 opposite to the rotation direction R0 of the blanket roll 40, and the second cleaning roll 33 is connected to the first cleaning roll 31. It rotates in the opposite direction (R2).

At this time, since the first cleaning roll 31 and the second cleaning roll 33 are made of a highly viscous material, the cleaning part 30 is a color resist and particles of the printing sheet 41 wound on the blanket roll 40. Remove foreign substances while sticking.

When the drying and cleaning of the printing sheet 41 is completed by the drying unit 20 and the cleaning unit 30 as described above, the blanket roll 40 is moved to the gravure roll 11 again to transfer the color resist and receive the transfer. The printing operation for transferring the color resist to the substrate G is repeated. The drying and cleaning operations for the printing sheet 41 may be performed every time during the printing operation, or may be performed intermittently after 5 or 10 times of the printing operation for transferring the color resist to the substrate G. .

In this way, the printing sheet 41 can be dried efficiently, thereby not only preventing the deformation of the printing sheet 41 but also improving the printing quality and improving the stability of the printing process.

In addition, it is possible to remove foreign matters and the like remaining on the surface of the printing sheet 41 can prevent the non-uniformity of the printing pattern, as well as to improve the printing quality and to improve the stability of the printing process.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited thereto.

As described above, the present invention is not limited to the described embodiments, and various modifications and changes can be made without departing from the spirit and scope of the present invention, which will be apparent to those skilled in the art. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

As described above, according to the present invention, the printing sheet can be dried efficiently to prevent deformation of the printing sheet, as well as to improve the printing quality and to improve the stability of the printing process.

In addition, according to the present invention, it is possible to remove the foreign matter and the like remaining on the surface of the printing sheet to prevent the non-uniformity of the printing pattern, it is possible to improve the printing quality and to improve the stability of the printing process.

Claims (17)

A blanket roll in which a printing sheet to which color resist is transferred from gravure is wound on an outer surface thereof; And A drying part provided around the blanket roll to dry the printing sheet, The drying unit, A space in which air flows is formed therein, and at least one air spraying hole through which the air is injected is formed on one side facing the blanket roll, and is formed long in the longitudinal direction of the blanket roll. Drying duct; A blower for generating the air; And And an air supply line connecting the blower to the internal space of the drying duct such that the air generated by the blower is supplied to the internal space of the drying duct. delete delete The method of claim 1, The drying unit further comprises a heat generating unit for emitting a predetermined heat toward the blanket roll. The method of claim 4, wherein The heating unit comprises at least one infrared lamp detachably coupled to one side of the drying duct. The method of claim 1, Further comprising an outer cabinet disposed to surround the blanket roll, The drying unit, An exhaust duct provided on one side of the drying duct and having at least one exhaust hole through which foreign material gas remaining in the external cabinet is exhausted; An exhaust line having one end coupled to the exhaust duct and the other end exposed to the outside of the outer cabinet to form a passage through which the foreign gas is exhausted; And And an exhaust pump coupled to the exhaust line to provide a suction force for exhausting the foreign gas. The method of claim 6, The drying duct and the exhaust duct are arranged parallel to each other along the longitudinal direction of the blanket roll, And exhaust holes of the exhaust duct are arranged on both sides of the drying duct with the drying duct therebetween. The method of claim 1, And a cleaning unit provided around the blanket roll to clean a foreign material remaining on the surface of the printing sheet. The method of claim 8, And the cleaning unit includes a first cleaning roll that adsorbs foreign matter remaining on the surface of the printing sheet while rotating while being circumscribed with the blanket roll. The method of claim 9, And the cleaning unit further comprises a second cleaning roll which rotates in contact with the first cleaning roll. The method of claim 10, And at least one outer surface of the first and second cleaning rolls is provided with an adhesive layer for adsorbing the foreign material. The method of claim 11, And the first and second cleaning rolls are disposed under the blanket roll. The method of claim 12, And the first and second cleaning rolls have a diameter relatively smaller than the diameter of the blanket roll. delete delete delete The method of claim 1, The gravure is a printing device, characterized in that any one selected from a roll-shaped gravure roll (Gravure roll) and a plate (Plate) -type gravure plate (Gravure plate).

Images