KR101473830B1 - Printer - Google Patents

Abstract

A printing apparatus is disclosed. A printing apparatus according to an embodiment of the present invention includes: a gravure plate having a concave-convex pattern portion formed on a surface thereof for transferring ink to an outer surface of a blanket roll for printing ink on a surface of the substrate; A blade unit coupled to one side of a moving carriage moved toward the gravure, for diffusing the ink to the entire area of the gravure surface, and then removing the ink diffused to the other side of the gravure except for the engraved pattern part; And a liquid receiving unit disposed adjacent to the blade unit and preventing the ink remaining on the blade unit from dropping into gravure when the blade unit that has completed the diffusion and removal work of ink is separated from the gravure.

Description

[0001]

More particularly, the present invention relates to a printing apparatus, and more particularly, to a method for preventing a phenomenon that an ink remaining on a blade unit in a process of separating a blade unit from a gravure that has completed the diffusion and removal of ink is dropped into the gravure, The present invention relates to a printing apparatus capable of efficiently preventing printing errors.

Recently, as the electronic display industry has rapidly developed in the semiconductor industry, a flat panel display (FPD) has begun to emerge.

Flat-panel displays are widely used as display devices for devices such as televisions, computer monitors, mobile phones, PDAs, and digital cameras. Types of flat panel displays include Liquid Crystal Display (LCD), Plasma Display Panel (PDP), and Organic Light Emitting Diodes (OLED).

In a flat panel display, a color filter layer for color implementation is typically formed. A color filter having a black matrix for preventing light from leaking to an area other than the image display area and deteriorating the image quality of the display device Respectively.

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

As shown in Figs. 1 (a) and 1 (b) showing two types of color filter layers in which R, G and B patterns are respectively printed, R (red), G (green) , And blue (B) patterns are formed.

Each pixel may be composed of sub-pixels having R, G, and B, but generally, each pixel usually has one pigment.

In forming the color filter layer, the R, G, and B patterns may be regularly arranged in a row so that the R, G, and B patterns are arranged in the same column, respectively, as shown in FIG. The R, G, and B patterns may be repeatedly arranged in the same row, as shown in (b) of FIG. The resolution difference can be variously implemented according to the arrangement of the R, G, and B patterns.

Such a color filter layer can be produced by various methods, for example, a dyeing method, a printing method, an electrodeposition method, and a pigment dispersion method. In the STN (Super Twisted Nematic) type LCD, which is one of the conventional passive matrix methods, the color filter layer is mainly manufactured by the dyeing method, the printing method and the adhesion method. However, the color filter layer is excellent in refinement and reproducibility, In a TFT (Thin Film Transistor) LCD, a pigment dispersion method is mainly used.

In the pigment dispersion method, a color filter layer is formed by forming a pattern of a photosensitive ink by a general photolithography process. That is, a photosensitive ink is coated on a substrate, a light is irradiated using a mask, and then a developer is applied to form a desired pattern to complete a color filter layer.

In order to form a color filter by the pigment dispersion method, a photolithography process is required. Such a photolithography process is complicated and requires a high manufacturing cost. Furthermore, in order to form a pixel corresponding to the coloring matter of the R, G, and B patterns, the photolithography process must be repeated three times, which further complicates the process.

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

Of course, the printing method can be used in wiring and pixel forming fields such as TSP (Touch Screen Panel), PDP, and AMOLED in addition to TFT LCD field, and can be applied to all printing electronic fields for manufacturing electronic parts.

The printing method includes a gravure in the form of a plate or a roll filled with ink and a corresponding printing roll so that the ink pattern of the pigment is formed on the substrate by the action of a roll, Thereby sequentially forming inks of different colors.

A printing apparatus that has been applied and registered by the present applicant has a coating unit for applying ink in gravure and a blade unit for diffusing and removing the gravure-applied ink on the surface of the gravure by the coating unit.

On the other hand, such a printing apparatus is a printing apparatus using an engraved gravure plate using gravure in which the concavo-convex pattern to which ink is applied is processed in a negative-angled form.

This is because it is advantageous to use the engraved pattern in order to maintain the thickness of the R, G and B patterns uniformly. The same applies to the gravure roll.

As described above, in the printing apparatus using the engraved plate, the blade unit is brought into contact with the surface of the gravure plate to uniformly spread the ink applied while squeegeeing onto the upper surface of the gravure plate, clean the unnecessary portion of the ink in the engraved pattern, And only the ink is left.

On the other hand, the blade units that have completed the diffusion and removal of the ink are moved across the gravure plate while moving to the upper area of the gravure plate. At this time, the ink remaining on the knife of the blade unit falls down to the gravure, Which may lead to product defects.

Korea Patent Office Application No. 10-2004-0040105

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method and apparatus for effectively preventing the ink remaining on the blade unit from dropping into gravure and contaminating the gravure during the process of separating the blade unit from the gravure, And a printing apparatus.

According to an aspect of the present invention, there is provided a gravure plate in which an engraved pattern portion of a concave-convex shape is formed on an outer surface of a blanket roll for printing ink on a surface of a substrate, A blade unit coupled to one side of a moving carriage moving toward the gravure and diffusing the ink to the entire area of the gravure surface and removing ink diffused to the remaining surface of the gravure except the engraved pattern part; And a liquid receiving unit disposed adjacent to the blade unit for preventing ink remaining on the blade unit from falling into the gravure when the blade unit having completed the diffusion and removal work of the ink is separated from the gravure, The printing apparatus according to the present invention can be provided.

The ink receiving unit includes: an ink receiver for receiving ink remaining on the blade unit; And a receiving unit driving unit connected to the moving carriage and the receiving unit for slidingly driving the receiving unit.

And a sensing sensor unit for sensing the position of the liquid receiver.

Wherein the detection sensor unit comprises: a protruding position detecting sensor for detecting whether or not the ink receiver is disposed at a protruding position for receiving ink from the blade unit; And a charging position detecting sensor for detecting whether the charging plate is disposed at a charging position charged to the moving carriage side.

And a control unit for controlling operations of the blade unit and the receiving unit.

The control unit may control the operation of the blade unit and the receiving unit so that the receiving unit can move between a protruding position where the receiving unit receives the ink and a loading position loaded on the moving balancing unit based on a signal of the detecting sensor unit .

The control unit may control to limit the operation of the moving bogie when the receiving unit is not disposed at the protruding position.

The receiving unit may be disposed in a lower region of the blade unit.

The blade unit includes a blade body portion; A diffusion blade coupled to the blade body portion and diffusing the ink applied on the gravure to the front surface of the gravure while being spaced apart from an upper portion of the gravure; And a removing blade coupled to the blade body portion and removing ink diffused in an unnecessary portion of the ink diffused over the entire upper surface of the gravure.

The blade body includes: a diffusion blade body coupled to one side of the moving truck, the diffusion blade body being coupled to the diffusion blade; And a removal blade body coupled to the other side of the moving carriage and coupled to the removal blade.

Wherein the diffusion blade body and the removal blade body respectively have a fixing block fixed to the moving truck side; A movable block coupled to the fixed block to move up and down; And an up-down driving part for moving the moving block up and down with respect to the fixed block.

Wherein the diffusion blade comprises: a knife holder rotatably coupled to the moving block and having a knife for diffusing the ink applied to the gravure on its tip; And a holder rotation driving unit for generating a driving force for rotating the knife holder relative to the moving block.

Wherein the removing blade comprises: a knife holder rotatably coupled to the moving block, the knife holder being mounted at a tip thereof with a knife for removing ink diffused in an unnecessary portion of the ink diffused over the entire upper surface of the gravure; And a holder rotation driving unit for generating a driving force for rotating the knife holder relative to the block.

A receptacle for collecting the ink to be removed may be provided at one side of the gravure.

The cleaning unit may further include a cleaning unit that is provided on a movement path through which the blade unit moves, and partially cleans the blade unit.

Wherein the cleaning unit forms a first accommodation space in which the blade unit can be partially immersed, and the first accommodation space is filled with a cleaning liquid for cleaning the blade unit; A cleaning liquid supply tank for supplying the cleaning liquid to the first containing space; And a cleaning liquid recovery tank for recovering the cleaning liquid used for cleaning the blade unit.

The gravure plate may further include an application unit that is disposed to be movable above the gravure plate and applies the ink to the surface of the gravure plate. The gravure may be a plate-like gravure plate.

According to the present invention, it is possible to efficiently prevent ink remaining on the blade unit from dropping into gravure and contaminating the gravure, in a process in which the blade unit having completed the diffusion and removal work of ink is separated from the gravure.

1 is a view showing two kinds of structures for a color filter layer in which R, G, and B patterns are printed.
2 is a schematic structural view of a printing apparatus according to an embodiment of the present invention.
3 is an enlarged front view of the blanket roll region shown in Fig.
4 is an enlarged view of the blade unit and the gravure plate shown in Fig.
5 is an enlarged structural view of the blade unit area.
6 is a control block diagram of a printing apparatus according to an embodiment of the present invention.
Fig. 7 is a view schematically showing a shape in which ink is diffused onto a gravure plate by the diffusion blade shown in Fig. 4. Fig.
Fig. 8 is a view schematically showing a shape for removing ink diffused into unnecessary portions of the gravure plate by the removing blade shown in Fig. 4. Fig.
Fig. 9 is a view for explaining a configuration of a cleaning unit for cleaning the blade unit shown in Fig. 2;

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

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

For reference, the substrate to be described below refers to a FPD (Flat Panel Display) substrate including a liquid crystal display (LCD), a plasma display panel (PDP), and an organic light emitting diode (OLED) The substrate is referred to as a substrate without distinguishing between them. And the substrate to be described below in the area is regarded as referring to a large substrate having a length / length of 1 meter (m) or more.

In addition, the printing apparatuses shown below are examples of one of various types of printing apparatuses, and the scope of the present invention can not be limited to the shapes of the drawings.

Fig. 2 is a schematic structural view of a printing apparatus according to an embodiment of the present invention, Fig. 3 is an enlarged front view of the blanket roll region shown in Fig. 2, Fig. 4 is an enlarged front view of the blade unit and the gravure plate shown in Fig. 6 is a control block diagram of a printing apparatus according to an embodiment of the present invention, and Fig. 7 is a cross-sectional view showing a state in which the ink is applied onto the gravure plate by the diffusion blade shown in Fig. Fig. 8 is a view schematically showing a shape for removing ink diffused into an unnecessary portion of a gravure plate by the removal blade shown in Fig. 4, and Fig. 9 is a cross- Fig. 5 is a view for explaining a configuration of a cleaning unit for cleaning the blade unit shown in Fig.

As shown in these drawings, a printing apparatus according to an embodiment of the present invention includes a lower base 90, a plate-like gravure plate 10 (hereinafter referred to as a " G (Green), and B (Blue) inks (C, see FIG. 2) are attached to the outer surface of the gravure plate 10 by being connected to the lower base so as to be movable to the upper portion of the gravure plate 10 A coating unit 40 for applying an ink C selected from a color ink, a color ink, a color ink, and the like to the outer surface of the gravure plate 10, A blade unit 20 for uniformly dispersing the ink C applied by the coating unit 40 to the formed engraved pattern part and then removing the ink C applied to the remaining surface except for the engraved pattern part, (C) of the R, G, and B inks (C) from the ink (C) A blanket roll (blanket roll) 50 for rewriting (printing) any one of the R, G, and B patterns on the surface, a work stage 60 on which a printing operation is performed on the substrate G, (20) adjacent to the blade unit (20), and ink remaining on the blade unit (20) is transferred to the gravure plate (10) when the blade unit (20) And a control unit 85 for controlling operations of the blade unit 20 and the liquid receiving unit 80. The control unit 85 controls the operation of the blade unit 20 and the liquid receiving unit 80. [

The gravure plate 10 serves to transfer any one of the inks C selected from the R, G and B inks C to the outer surface of the blanket roll 50. [

In the case of this embodiment, the gravure is applied as a plate type gravure plate 10, but the gravure may be a gravure roll in the form of a roll.

The area of the surface of the gravure plate 10 has a size substantially similar to the area of the sheet (not shown) wound on the blanket roll 50 and the blanket roll 50 is moved from one end to the other end of the gravure plate 10 The ink C patterned in a predetermined pattern on the gravure plate 10 can be transferred onto the sheet of the blanket roll 50 by rotating and moving.

1 and 2B, the R, G, and B patterns are printed on the substrate G through one printing apparatus when the R, G, and B patterns are printed on the substrate G, Are not printed at the same time. That is, in order to print the R, G, and B patterns on the substrate G, at least three printing apparatuses are provided, and one of R, G, and B patterns is selected by three printing apparatuses and printed on the substrate G will be.

The coating unit 40 for applying the ink C to the outer surface of the initial gravure plate 10 is arranged so that only one ink C selected from the R, G, and B inks C is formed on the outer surface of the gravure plate 10 . The coating unit 40 applies only ink C of any one color selected from red, green, and blue to the outer surface of the gravure plate 10. FIG.

Although not shown in detail, the outer surface of the gravure plate 10 is patterned with an uneven pattern to which the ink C is substantially applied. The concavo-convex pattern at this time can be embossed or engraved, as shown in the enlarged view of FIG. The ink C is applied to the outer surface of the projected convexo-concave portion and transferred to the blanket roll 50. If the convexo-concave shape is the concave / convex shape, the ink C is applied inside the depressed concave groove portion 10a, 50).

The blanket roll 50 transfers the ink C from the outer surface of the gravure plate 10 and transfers the ink C to the substrate G so that the ink C having the shape as shown in Figs. 1 (a) and 1 (b) It may be advantageous for the concavo-convex pattern formed on the outer surface of the gravure plate 10 to have a concave shape in order to uniformly maintain the thicknesses of the R, G, and B patterns from the surface of the substrate G. [

Therefore, in order for the application unit 40 to apply any one of the inks C selected from the R, G and B inks precisely to the recessed portion 10a formed on the outer surface of the gravure plate 10, I.e., to the upper part of the gravure plate 10, as shown in Fig. In other words, the coating unit 40 is movable along the rail 91 formed on the lower base 90, and thus can move to the front end of the outer surface of the gravure plate 10 during the coating operation.

4, the coating unit 40 of the present embodiment is provided with a dispenser 41 for applying the selected ink C to the outer surface of the gravure plate 10 and a dispenser 41 for dispensing the selected ink C onto the outer surface of the gravure plate 10, And a dispenser supporting portion 43 movably supported along the rails 91 of the lower base 90 so as to be movable in the transverse direction and the height direction of the lower base 90. Although not shown, a driving device (not shown) for driving the dispenser 41 in each direction is mounted on the dispenser supporting part 43. Accordingly, the dispenser 41 can be moved in the longitudinal direction of the lower base 90 It is possible to smoothly move in the transverse direction and the height direction.

The dispenser 41 serves to inject ink C from an external ink C supply unit (not shown) and to substantially spray the ink C onto the outer surface of the gravure plate 10. [ This dispenser 41 moves in the longitudinal direction of the lower base 90 on the dispenser supporting portion 43, that is, in the width direction of the gravure plate 10 and moves in the front end region of the outer surface of the gravure plate 10 C) is applied.

On the other hand, the ink C applied to the front end region of the outer surface of the gravure plate 10 is diffused to the entire area of the outer surface of the gravure plate 10, and then the remaining surfaces 10b, 2) must be removed. To apply the ink C applied to the outer surface 10b of the gravure plate 10 after spreading the ink C onto the outer surface 10b of the gravure plate 10, A blade unit 20 is provided. The blade unit 20 will be described later in detail.

The blanket roll 50 transfers the ink C applied in the recessed grooves formed on the outer surface of the gravure plate 10 and then moves to the workpiece stage 60 to form the blanket rolls 50 on the substrate G as shown in Figs. G, and B patterns as shown in FIG. 5B.

On the outer surface of the blanket roll 50, as described above, a sheet on which the ink C is transferred from the gravure plate 10 is wound. Of course, since the sheets used for the number of times exceeding the proper limit are to be replaced, the blanket roll 50 is further provided with sheet changing means (not shown) for easily changing the sheets. The sheet replacing means also serves to impart a constant tension to the sheet so that the sheet can be easily rewound while being stretched unexpectedly on the outer surface of the blanket roll 50 while allowing the sheet to be easily replaced.

As described above, in the case of the printing apparatus of the present embodiment, the blanket roll 50 transfers the ink C on the gravure plate 10 and then the substrate G loaded on the work stage 60, The blanket roll 50 must have a structure capable of moving up and down in order to carry out a rewriting (printing) operation on the blanket roll 50. [

3, the blanket roll 50 is provided with a gravure plate 10 and a plurality of roll up / down driving portions 55 for moving the blanket roll 50 up and down relative to the work stage 60, . In this embodiment, the plurality of roll-up / down driving portions 55 are arranged in a quadrangular configuration so as to be spaced apart from each other in the lower region of the blanket roll 50 with respect to the blanket roll 50.

As shown in FIG. 3, each of the plurality of roll-up / down driving portions 55 includes a servomotor 56 rotatable in the forward and reverse directions, a servo motor 56 A ball screw 57 which is coupled to the ball screw 57 and is movable upward and downward along the longitudinal direction of the ball screw 57 and at least one side of which is engaged with the blanket roll 50; (58).

When the motor shaft of the servomotor 56 rotates in the forward and reverse directions with the power applied to the servo motor 56, the ball screw 57 rotates in the forward and reverse directions, The roll 50 can be moved up and down.

On the other hand, the blanket roll 50 must be able to roll and move on the gravure plate 10 or on the work stage 60 for a substantial printing operation on the substrate G, i.

To this end, both sides of the blanket roll 50 are moved linearly on the rails 91 of the lower base 90, as shown in Fig. 3, as well as on the blanket roll 50 (Not shown).

The moving and rotating part 52 includes a moving part 52a for linearly moving the blanket roll 50 along the rail 91 of the lower base 90 and a rotating part 52b for rotating the blanket roll 50 A linear motor capable of precise control can be applied to the former, and a DC motor or the like can be applied to the latter.

On the other hand, in the printing apparatus of the present embodiment, the workpiece stage 60 is slightly (several millimeters) aligned on the X axis, the Y axis, and the? Axis for aligning the substrate G with respect to the blanket roll 50 it is possible to align the liquid crystal molecules and to be substantially fixed at the corresponding positions.

3, the work stage 60 includes a main stage 61 for supporting the substrate G and a main stage 61 for supporting the substrate G together with the main stage 61, G, and a stage driving unit 63 for driving the alignment stage 62. The stage driving unit 63 drives the alignment stage 62,

The main stage 61 is a part where the substrate G on which the ink C is printed by the blanket roll 50 is loaded and is formed into a square shape so as to support the substrate G, do. A rectangular hollow space is formed inside the main stage 61 so that the alignment stage 62 can be disposed. The alignment stage 62 is disposed in the hollow space and operates independently by the stage driving unit 63. [ This main stage 61 can be manufactured with a stone quartz plate so that strict dimensional control is possible and particles can be prevented from being generated even if friction occurs between the substrate G and the main stage 61 .

On the other hand, as described above, in order for the printing operation on the substrate G loaded on the workpiece stage 60 to proceed reliably, the selected ink C on the outer surface of the gravure plate 10 must be accurately patterned. That is, after the ink C applied by the application unit 40 is diffused to the front surface of the gravure plate 10, the ink C diffused to the remaining surface 10b other than the recessed portion 10a must be removed cleanly do.

To this end, the printing apparatus of the present embodiment further comprises a blade unit 20 for the diffusion and removal of the ink C to the gravure plate 10.

7 and 8, the blade unit 20 of this embodiment is attached to both sides of the dispenser supporting portion of the coating unit 40 to move over the gravure plate 10 and to move the gravure plate 10 The ink C applied to the outer surface of the outer surface of the gravure plate 10 is diffused to the outer surface of the gravure plate 10 and then the ink C diffused to the surface 10b excluding the recessed portion 10a is removed.

4, the blade unit 20 includes a blade body portion 21 coupled to the dispenser support portion 43, and a blade body portion (not shown) A diffusion blade 30 coupled to the gravure plate 10 and diffusing the ink C applied on the gravure plate 10 to the front surface of the gravure plate 10 while being separated from the outer surface of the gravure plate 10, An unnecessary portion of the ink C that is joined to the blade body 21 so as to face the blade body 30 and diffused into the front surface of the gravure plate 10 by the diffusion blade 30, And a removing blade 35 for removing the ink C diffused into the recording medium 10b.

The blade body portion 21 has a diffusion blade body 21a coupled to one side portion of the dispenser support portion 43 facing the workpiece stage 60 and coupled with the diffusion blade 30, And a removing blade body 21b to which the removing blade 35 is coupled. With this configuration, when the blade unit 20 coupled to the coating unit 40 moves in the direction of the workpiece stage 60 from above the gravure plate 10, the diffusion operation of the ink C can proceed, The removal operation of the ink C can proceed.

The diffusion blade body 21a and the removal blade body 21b have substantially the same configuration. 4, the spreading blade 30 and the removing blade 35 are respectively provided with fixing blocks 22a and 22b fixedly coupled to the dispenser supporting portion 43 of the coating unit 40, Moving blocks 23a and 23b which are coupled to the movable blocks 23a and 23b so as to move up and down relative to the movable blocks 23a and 23b and to which the diffusion blades 30 and the removing blades 35 are respectively coupled, Up and down driving sections 24a and 24b for moving up and down relative to each other.

The movable blocks 23a and 23b can move upward and downward in the height direction with respect to the fixed blocks 22a and 22b fixedly coupled to the dispenser supporting part 43 to form the diffusion blades 30 coupled to the moving blocks 23a and 23b, The removal blade 35 may approach or separate from the outer surface of the gravure plate 10. That is, the gap between the outer surface of the gravure plate 10 and the diffusion blade 30 and the removal blade 35 can be adjusted by moving the moving blocks 23a and 23b with respect to the fixed blocks 22a and 22b will be.

The elevating and lowering driving parts 24a and 24b are provided as air cylinder devices so that the moving blocks 23a and 23b can move linearly along the rails formed on the fixed blocks 22a and 22b. However, in the present embodiment, the up-and-down driving units 24a and 24b are described as being provided with the air cylinder device, but they may be provided by a hydraulic device or a linear motor.

The diffusion blade 30 serves to diffuse the ink C applied to the front end region of the outer surface of the gravure plate 10 to the entire area of the outer surface of the gravure plate 10, A knife 31 provided at a length substantially equal to the width of the gravure plate 10 and diffusing the ink C while maintaining a predetermined gap with the gravure plate 10; A knife holder 32 which is supported by the moving block 23a so as to be rotatably coupled with the moving block 23a so as to adjust the inclination angle of the knife 31 with respect to the gravure plate 10, And a holder rotation driving part (33) for generating a driving force for rotating the holder (23a).

7, in order to apply the ink C to the entire area of the outer surface of the gravure plate 10, the diffusion blades 30 should be positioned at the front end region of the outer surface of the gravure plate 10, It is required to linearly move along the longitudinal direction of the gravure plate 10 while maintaining a predetermined distance from the outer surface of the plate 10. That is, the position of the knife 31 of the diffusion blade 30 with respect to the gravure plate 10 should be determined. The positioning of the spreading blade 30 relative to the gravure plate 10 is determined by determining the position in the height direction by the above-described lifting / lowering drive unit 24a and then rotating the knife holder 32 by the rotation driving unit 33. [ It is possible to set the most suitable position of the lens.

The removal blade 35 has substantially the same configuration as the diffusion blade 30. The knife 36 of the removing blade 35 is disposed on the gravure plate 10 in order to remove the ink C diffused on the other surface 10b of the outer surface of the gravure plate 10 except for the recessed portion 10a. The ink C is removed from the outer surface of the gravure plate 10 on the remaining surface 10b except for the recessed groove 10a in the state of being in contact with the outer surface of the gravure plate 10. [

On the other hand, the ink C removed from the outer surface of the gravure plate 10 must be discharged to the outside. If the ink C removed by the removing blade 35 drops to the outside of the gravure plate 10, it may contaminate the work space, which may deteriorate the reliability of the printing operation for the substrate G have.

Therefore, as shown in Fig. 4, a receptacle 15 for collecting the removed ink C is mounted on one side of the gravure plate 10. As shown in Fig. These receptacles have a width and a substantial length of the gravure plate 10, and thus the ink C removed by the removing blade 35 can be reliably collected without being discharged to the outside.

On the other hand, when the diffusion blade 30 or the removal blade 35 spreads or removes the selected ink C on the outer surface of the gravure plate 10, some of the ink C is scattered by the diffusion blade 30 or the removal blade 35, It is attached to the knife 31 of the diffusion blade 30 or the knife 36 of the removal blade 35 and this is not finally collected by the receptacle 15 and the knife 31, . When the ink C is diffused to the outer surface of the gravure plate 10 or removed from the outer surface of the gravure plate 10 by the diffusion blade 30 or the removal blade 35 in a state where the ink C remains, A process error may occur due to the ink C remaining in the knives 31 and 36. [

Therefore, in order to solve such a problem, the printing apparatus of the present embodiment further includes a cleaning unit 70 for cleaning the knife 31, 36 of the blade unit 20. Of course, the cleaning unit 70 may be omitted in some cases.

The cleaning unit 70 partially dips the knife 31 of the diffusion blade 30 or the knife 36 of the removal blade 35 to remove the ink C that remains (solidified) in the knives 31, A first accommodating space 73 for accommodating the cleaning liquid 71 so that the cleaning liquid 71 can be cleaned from the knives 31 and 36 and a second accommodating space 73 disposed outside the first accommodating space 73, A cleaning liquid supply tank 72 for supplying the cleaning liquid 71 to the first accommodation space 73 of the cleaning tub 72, And a cleaning liquid recovery tank 77 for recovering the cleaning liquid 71 used for cleaning the knives 31 and 36.

The cleaning unit 70 further includes a cleaning liquid supply line L1 that connects the first accommodating space 73 of the cleansing cylinder 72 and the cleaning liquid supply tank 75, And a cleaning liquid circulating line L3 for connecting the cleaning liquid recovery tank 77 and the cleaning liquid supply tank 75 to each other.

As shown in Fig. 9, the sanitary trunk 72 is formed into a first accommodation space 73 and a second accommodation space 74 that surrounds the first accommodation space 73. As shown in Fig. The cleaning liquid 71 is supplied to the first housing space 73 through the supply port 73a on the lower surface thereof. The cleaning liquid 71 is continuously supplied to the first accommodation space 73 for cleaning the knives 31 and 36 of the blade unit 20 and the cleaning liquid 71 is continuously supplied to the first accommodation space 73 The cleaning liquid 71 flowing to the upper end overflows and flows into the second accommodation space 74. The cleaning liquid 71 present in the upper portion of the first accommodation space 73 in which the knives 31 and 36 of the blade unit 20 are partially immersed is guided by the knives 31 and 36 of the blade unit 20, The cleaning liquid 71 of the purity is kept flowing from the lower portion of the first housing space 73 to the upper portion of the first housing space 73 to clean the knives 31 and 36 cleanly.

The cleaning liquid 71 overflowed from the first accommodation space 73 to the second accommodation space 74 is supplied to the cleaning liquid collection line L2 connected to the recovery port 74a provided on the lower surface of the second accommodation space 74 And is then recovered into the cleaning liquid recovery tank 77.

The cleaning liquid recovery tank 77 may include a concentration measuring device (not shown) for measuring the concentration of the cleaning liquid 71. The cleaning liquid 71 in the cleaning liquid recovery tank 77 is discharged to the outside through a discharge port (not shown) provided in the cleaning liquid recovery tank 77 when the predetermined concentration exceeds a predetermined concentration of the cleaning liquid 71, If the concentration is smaller than the predetermined concentration, it is recycled along the circulation line L3 to move to the cleaning liquid supply tank 75. A circulation pump 78 is provided in the cleaning liquid recovery line L2 for connecting the cleaning liquid recovery tank 77 and the cleaning liquid supply tank 75 so that the cleaning liquid 71 can be moved to the cleaning liquid supply tank 75, So that the cleaning liquid 71 of the cleaning liquid supply port 77 can smoothly move to the cleaning liquid supply tank 75.

The cleaning liquid supply tank 75 supplies the cleaning liquid 71 circulated from the cleaning liquid recovery tank 77 to the cleaning tub 72 or the cleaning liquid 71 through an inlet (not shown) provided in the cleaning liquid supply tank 75 And supplies it to the washing tub 72. A cleaning liquid supply line L1 for connecting the cleaning liquid supply tank 75 and the first accommodation space 73 of the washing tub 72 is provided with a flow control valve 79 for controlling the amount of the cleaning liquid 71, (71) to the washing tub (72).

As described above, the cleaning unit 70 can cleanly clean the knives 31 and 36 of the blade unit 20, thereby removing the remaining ink C on the knives 31 and 36, Can be prevented from being generated.

Also, the cleaning liquid 71 used for cleaning can be circulated and reused to reduce the cost required for cleaning.

5 and 6, the ink receiver unit 80 is disposed adjacent to the blade unit 20, and the blade unit 20 having completed the ink diffusion and removal operation is disposed on the gravure plate 10 And serves to prevent the ink remaining on the blade unit 20 from being dropped onto the gravure plate 10 when the ink is separated.

The ink receiver unit 80 is connected to the ink receiver 81 for receiving ink remaining on the blade unit 20 and to the moving carriage 95 and the ink receiver 81 to slide and drive the ink receiver 81 And includes an ink receiver driving unit 82.

The ink receiver 81 is a kind of supporting bowl for receiving ink. 5, the lower portion of the blade unit 20, in particular, the lower portion of the knife 31 of the diffusion blade 30 and the knife 36 of the removal blade 35, To receive ink which can be dropped from the knives 31 and 36 below.

However, in the case where the ink receiver 81 performing such a function always protrudes, it is difficult for the blade unit 20 to perform the ink diffusion and removal operation due to the interference due to the ink receiver 81.

In other words, when the blade unit 20 performs the spreading and removing operations of the ink, the ink receiver 81 must be loaded to the moving carriage 95 side. When the blade unit 20 having been subjected to the diffusion and removal operations is lifted up and moved past the gravure plate 10, the ink receiver 81 protrudes to receive ink. To this end, a mount receiver driving unit 82 is provided. The liquid receiver driving unit 82 is connected to the moving carriage 95 and the liquid receiver 81 to slide the liquid receiver 81.

Therefore, in order for the liquid receiver driving unit 82 to operate, the position of the liquid receiving unit 81 must be sensed, and the control unit 85 must control the operation of the liquid receiving unit driving unit 82 based on the information.

The detection sensor unit for detecting the position of the liquid receiver 81 includes a protrusion position detection sensor 83 for detecting whether the liquid receiver 81 is disposed at a protruding position where ink is received from the blade unit 20, And a loading position detection sensor 84 for detecting whether or not the receiver 81 is disposed at a loading position charged to the moving carriage 95 side.

On the other hand, on the basis of the signals from the protruding position detecting sensor 83 and the loading position detecting sensor 84, the control unit 85 detects the difference between the protruding position where the ink receiver 81 receives ink and the charging position charged in the moving carriage 95 side The operation of the blade unit driving unit 82 of the blade unit 20 and the receiving unit 80 is controlled.

Particularly, the control unit 85 controls the operation of the moving carriage 95 so that the moving carriage 95 is not operated when the carriage 81 is not disposed at the protruding position.

Hereinafter, the operation of the printing apparatus will be described.

The substrate G is loaded onto the upper surface of the workpiece stage 60 by a separate transfer device (not shown). When the substrate G is transferred to the upper portion of the workpiece stage 60, alignment of the alignment stage 62 with respect to the substrate G proceeds and then the substrate G is supported on the upper surface of the main stage 61 .

Thereafter, the dispenser 41 of the coating unit 40 applies any one of the inks C selected from the R, G, and B inks C to the front end region of the outer surface of the gravure plate 10. Subsequently, diffusion and removal operations for the ink proceed. At this time, the control unit 85 loads the ink receiver 81 into the loading position so that the knives 31 and 36 are not restrained in operation.

Diffusion and removal operations will be described. The blade unit 20 is moved in the longitudinal direction of the gravure plate 10 and the ink C applied to the outer surface of the gravure plate 10 is transferred to the front surface of the gravure plate 10 . Such a diffusion operation of the ink C advances linearly in one direction with the knife 31 of the diffusion blade 30 held at a predetermined interval from the gravure plate 10. [

The ink C applied onto the gravure plate 10 by the diffusion blade 30 is diffused into the entire area of the outer surface of the gravure plate 10 and then is supplied to the removal blade 35 The ink C diffused on the remaining surface 10b of the outer surface of the gravure plate 10 other than the recessed portion 10a is removed. To this end, the knife 36 of the removal blade 35 is positioned so as to be tangent to the gravure plate 10, and then the unnecessary ink C is removed from the gravure plate 10 while moving linearly in the direction opposite to the progress direction of the diffusion operation do. At this time, the removed ink C is collected in a receptacle 15 provided on the side of the gravure plate 10.

When the spreading and removing operation is completed, the blade unit 20 is lifted and moved past the gravure plate 10. At this time, the control unit 85 controls the liquid receiving unit 80 so that the liquid receiving unit 81 is placed at the protruding position. And controls the operation of the receiver driving unit 82. Therefore, when the blade unit 20 is lifted and moved past the gravure plate 10, the ink receiver 81 can receive the ink dropped on the gravure plate 10, thereby preventing the quality from being incurred . On the other hand, when the liquid receiver 81 is disposed at the protruding position, the control unit 85 controls the moving carriage 95 so as not to move.

When the diffusion and removal operations are completed and the ink C is applied to the gravure plate 10, the blanket roll 50 is transferred to the blanket roll 50 in order to transfer the patterned ink C onto the gravure plate 10. [ The gravure plate 10 is lowered in the direction of the gravure plate 10 so that the blanket roll 50 and the outer surface of the gravure plate 10 are brought into contact with each other. The ink C applied to the outer surface of the gravure plate 10 is wound on the outer surface of the blanket roll 50 as it is so that the blanket roll 50 advances from one end of the gravure plate 10 toward the other end, Lt; / RTI >

Next, after the blanket roll 50 has transferred the ink C from the gravure plate 10, the blanket roll 50 transfers the transferred ink C onto the substrate G loaded on the workpiece stage 60 I do.

On the other hand, the cleaning operation for the knives 31 and 36 of the blade unit 20 can proceed when the transfer operation and the rewinding operation are performed. The knives 31 and 36 of the blade unit 20 are moved so as to be partially immersed in the first receiving space 73 of the washing tub 72 and then the washing liquid 71 is circulated in one direction, It is possible to clean the ink (C) remaining in the ink tank

According to the printing apparatus of this embodiment having such a structure and operation, the ink remaining on the blade unit 20 during the process of separating the blade unit 20 from the gravure plate 10, It is possible to effectively prevent the phenomenon that the gravure plate 10 is dropped and the gravure plate 10 is contaminated.

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

In the above-described embodiment, although the blade unit is described as having two blades, that is, a diffusion blade and a removal blade, the diffusion and removal operations of the ink may be performed by one blade.

Although the gravure plate is fixed and the blade unit is linearly moved and the application operation is progressed in the above embodiment, the blade unit is fixedly coupled to the lower base so that the blade unit can only move up and down and rotate, It may be possible to advance the application work by joining them so as to be movable.

Although the description has been omitted in the above embodiments, the printing apparatus of this embodiment can be used in the fields of wiring and pixel formation such as TSP (Touch Screen Panel), PDP, AMOLED and the like, And the like.

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 invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

10: gravure plate 20: blade unit
21: blade body portion 21a: diffusion blade body
21b: removal blade body 30: diffusion blade
35: removing blade 40: applying unit
41: dispenser 43: dispenser supporting part
50: blanket roll 60: workpiece stage
70: Cleaning unit 80: Receiving unit
81: liquid receiver 82: liquid receiver driver
83: protrusion position detection sensor 84: charging position detection sensor
85: control unit 90: lower base
95: Moving lane

Claims (17)

A gravure in which an engraved pattern portion of a concavo-convex shape is formed on an outer surface of a blanket roll for printing ink on a surface of a substrate to transfer the ink;
A blade unit coupled to one side of a moving carriage moving toward the gravure and diffusing the ink to the entire area of the gravure surface and removing ink diffused to the remaining surface of the gravure except the engraved pattern part;
Wherein when the blade unit that is disposed adjacent to the blade unit and completes the diffusion and removal work of the ink is separated from the gravure, the ink remaining on the blade unit is prevented from falling into the gravure, An ink receiving unit for receiving ink remaining on the ink receiving unit, and a liquid receiving unit connected to the liquid conveying unit and the ink receiving unit to drive the ink receiving unit to slide;
A protruding position detecting sensor for detecting whether or not the ink receiver is disposed at a protruding position for receiving ink from the blade unit; and a controller for detecting whether or not the ink receiver is disposed at a loading position A sensing sensor unit having a position sensing sensor for sensing a position of the support;
A receptacle provided at one side of the gravure for collecting the ink to be removed; And
And a cleaning unit provided on a moving path of the blade unit for moving the blade unit and partially cleaning the blade unit,
The blade unit includes:
A diffusion blade for diffusing the ink applied on the gravure to the front surface of the gravure while being spaced apart from an upper portion of the gravure;
A removal blade for removing ink diffused to an unnecessary portion of the ink diffused over the entire upper surface of the gravure; And
A blade body coupled to one side of the moving truck and having a diffusion blade body to which the diffusion blade is coupled and a removal blade body coupled to the other side of the moving truck and to which the removal blade is coupled,
Wherein the diffusion blade body and the removal blade body each have:
A fixed block fixed to the moving truck side;
A movable block coupled to the fixed block to move up and down; And
And an up-down driving part for moving the movable block up and down with respect to the fixed block,
Wherein the diffusion blade and the removal blade each include a knife holder to which a knife is mounted and a holder rotation driving unit that generates a driving force to rotate the knife holder with respect to the movement block. delete delete delete The method according to claim 1,
Further comprising a control unit for controlling operations of the blade unit and the receiving unit. 6. The method of claim 5,
The control unit controls the operation of the blade unit and the receiving unit so that the receiving unit can move between the protruding position where the receiving member receives the ink and the loading position loaded on the moving conveying unit based on a signal from the detecting sensor unit . 6. The method of claim 5,
Wherein the control unit controls the operation of the moving carriage to be restricted when the receiving unit is not disposed at the protruding position. The method according to claim 1,
Wherein the receiving unit is disposed in a lower region of the blade unit. delete delete delete delete delete delete delete The method according to claim 1,
The cleaning unit includes:
Wherein the first accommodation space is filled with a cleaning liquid for cleaning the blade unit, the first accommodation space being formed with a first accommodation space in which the blade unit can be partially immersed therein;
A cleaning liquid supply tank for supplying the cleaning liquid to the first containing space; And
And a cleaning liquid recovery tank for recovering the cleaning liquid used for cleaning the blade unit. The method according to claim 1,
Wherein the gravure is a plate-like gravure plate, and the coating unit is provided movably above the gravure plate and applies the ink to the surface of the gravure plate.

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