KR100833117B1 - Printer - Google Patents

Abstract

A printing apparatus is disclosed. The printing apparatus of the present invention includes: a gravure roll for transferring color resist to an outer surface of a blanket roll for printing color resist onto a surface of a substrate; And a coating unit for supporting the coating unit to move between the coating unit for applying the color resist to the outer surface of the gravure roll and the working position for applying the color resist to the outer surface of the gravure roll and the standby position away from the gravure roll. It characterized in that it comprises a dispenser having a. According to the present invention, the dispenser can be effectively moved to the application area of the gravure roll without interference with the surrounding structure, and the application efficiency of the color resist to the gravure roll can be improved.

Printer, Gravure Roll, Dispenser, Color Resist, Cleaning

Description

Print Device {Printer}

1A and 1B are diagrams illustrating two types of structures of color filter layers printed with R, G, and B patterns, respectively.

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

FIG. 3 is a schematic view seen from the direction 'A' of FIG. 2.

4 is a view partially seen in the 'B' direction of FIG.

5 is a view partially seen in the 'C' direction of FIG.

6 is a view for explaining the operation of the clogging inspection unit for inspecting the clogging of the coating nozzle shown in FIG.

7 is a view for explaining the operation of the nozzle cleaning unit for cleaning the coating nozzle shown in FIG.

* Explanation of symbols for the main parts of the drawings

     1: printing apparatus 5: gravure roll

     5a: recess 10: dispenser

     11: coating unit 12: coating nozzle

     14: tube connection part 15: injection amount control unit

     16: unit body 21: coating unit support

     22: rail body 23: rail block

     24: arm rotating motor 25: lifting and lowering drive

     26: fixed block 27: moving block

     28: sliding drive part 29: rotating connection arm

     30: doctor blade 40: blanket roll

     50: work stage 60: lower base

     62: support 70: work table

     80: clogging inspection unit 81: optical sensor

     82: recovery container 90: nozzle cleaning unit

     91: washing liquid 92: washing tub

     95: cleaning liquid supply tank 97: cleaning liquid recovery tank

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus, and more particularly, to a printing apparatus capable of improving the application efficiency of color resist to a gravure roll while being able to control the movement of the dispenser simply and effectively.

Recently, the flat panel display (FPD) has begun to emerge as the electronic display industry is rapidly developing among the semiconductor industry. A flat panel display is widely used as a display device of a TV, a computer monitor, or a device such as a mobile phone, a PDA, or a digital camera. Types of flat panel displays include liquid crystal displays (LCDs), plasma display panels (PDPs), and organic light emitting diodes (OLEDs).

Generally, a color filter layer is formed in a flat panel display to implement color. A color filter in which a black matrix is formed to prevent deterioration of image quality of a display device due to light leakage to an area other than an image display area is provided. It 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 substrate on which a color filter layer is formed, and a liquid crystal filled between these substrates.

In the color filter layer, as illustrated in FIGS. 1A and 1B, pixels having a pigment of R (Red), G (Green), and B (Blue) patterns are typically 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, as shown in FIG. 1A, R, G, and B patterns may be arranged in a row such that R, G, and B patterns are arranged in the same column, respectively (RGB Vertical Stripe), or in FIG. 1B. As shown, R, G, and B patterns may be repeatedly arranged in the same row (Mosaic). The difference in resolution can be realized in various ways according to the arrangement of the 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 applying 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 the process is not only complicated but also expensive to manufacture. 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.

 That is, after applying R, G, B color resists (color ink, color pigments) on the outer surface of the gravure roll, the blanket roll is contacted with the outer surface of the gravure roll and then R is removed from the gravure roll. R, G, and B patterns are formed on the substrate by the action of a blanket roll after transferring the G, B color resists.

If such a printing method can be put to practical use, the process of manufacturing a color filter layer by printing R, G, and B patterns on a substrate may be more effectively performed. However, an apparatus capable of manufacturing a color filter layer using such a printing method (hereinafter, ' Printing device 'has not been put to practical use. Therefore, research and development on such a printing device is actively underway.

Such a printing apparatus includes a dispenser for applying R, G, and B color resists to the outer surface of the gravure roll, in addition to the above-described gravure roll and blanket roll, and a color resist which is not required among the color resists applied to the outer surface of the gravure roll. It is known that the doctor blade to remove is provided.

With this configuration, the dispenser applies the color resist to the outer surface of the gravure roll and removes the unnecessary color resist by the doctor blade, and then the color resist from the gravure roll to the blanket roll and the color filter substrate (hereinafter referred to as 'substrate'). Are sequentially transferred.

In this process, the color portion, that is, ink, is uniformly filled in the pattern portion formed in the circumferential direction of the gravure roll to realize the desired print quality. In order to achieve this, a certain amount of color resist must be evenly applied by the dispenser along the longitudinal direction of the gravure roll.

By the way, a fixed or mobile dispenser may be expected as a dispenser for applying color resist to the outer surface of the gravure roll, but in the case of a fixed dispenser, it is always located on the top of the gravure roll while working or waiting to generate particles. Since it is fixed, it may be difficult to effectively apply color resist to the outer surface of the gravure roll.In the case of a mobile dispenser, a failure may occur due to interference with surrounding structures when moving for application. There is a fear that the coating operation may be delayed by this movement operation.

For this reason, there is a need for a printing apparatus having a dispenser that does not generate interference while effectively moving the application area of the gravure roll.

Accordingly, an object of the present invention is a printing apparatus which can effectively move a dispenser to an application area of a gravure roll without interference with a surrounding structure, and can also improve the application efficiency of color resist to a gravure roll.

The object is, according to the present invention, a gravure roll for transferring the color resist to the outer surface of the blanket roll (Printet Roll) for printing the color resist to the surface of the substrate; And an application unit for applying the color resist to the outer surface of the gravure roll, and the application unit to move between a working position for applying the color resist to the outer surface of the gravure roll and a standby position deviated from the gravure roll. It is achieved by a printing apparatus comprising a dispenser having an application unit support for supporting the unit.

Here, the coating unit support portion, the rail body fixedly arranged side by side with the gravure roll at a position adjacent to the gravure roll; A rail block coupled to the rail body to be slidably movable along the longitudinal direction of the gravure roll; And it is preferable that the coating unit, it includes a rotation connecting arm for rotatably connecting the coating unit with respect to the rail block so as to move while rotating between the working position and the standby position are mutually arranged.

It is preferable that an arm rotation motor is provided in the coupling region of the rotation connection arm and the rail block.

The coating unit is a support unit, one side is coupled to the coating unit and the other side is coupled to one end of the pivoting connection arm, the lifting unit to raise and lower the coating unit so that the coating unit is accessible and spaced apart from the gravure roll The steel driving unit may further include.

The lifting and lowering drive unit, a fixed block fixed to one end of the pivotal connection arm; A moving block coupled to the fixed block to move up and down relative to the fixed block while supporting the coating unit; And a sliding drive unit coupled to the fixed block and the movable block, respectively, for sliding the movable block relative to the fixed block.

In addition, the coating unit, the unit body; A coating nozzle coupled to one side of the unit body and having a nozzle hole in which the color resist is injected; And a tube connection part coupled to the other side of the unit body and to which a tube for guiding the color resist to the nozzle hole is connected.

The unit body may be further coupled to the injection amount adjusting unit for adjusting the injection amount of the color resist is injected through the nozzle hole.

It is preferably provided in the standby position, it further comprises a clogging inspection unit for inspecting whether the clogging of the nozzle hole of the coating unit.

The clogging inspection unit may include an optical sensor that projects light toward the color resist injected through the nozzle hole and senses whether the nozzle hole is blocked by reflecting the projected light. desirable.

The clogging inspection unit may further include a recovery container for recovering the color resist injected through the nozzle hole to sense whether the nozzle hole is blocked.

The apparatus may further include a nozzle cleaner provided at the standby position and partially cleaning the coating nozzle to prevent the nozzle hole from being blocked by the solidified color resist.

The nozzle cleaning unit may include: a cleaning container forming a first accommodating space in which the coating nozzle is partially immersed, and filled with a cleaning liquid for cleaning the coating nozzle in the first accommodating space; A cleaning liquid supply tank for supplying the cleaning liquid to the first accommodation space of the cleaning cylinder; And a cleaning solution recovery tank for recovering the cleaning solution used for cleaning the coating nozzle.

It is preferable that a second accommodating space is further formed inside the washing tub, the second accommodating space being isolated from the first accommodating space and accommodating the washing liquid overflowed from the first accommodating space.

It is preferable that the said washing container is cylindrical shape, and in the inside of the said washing container, the said 1st accommodating space is arrange | positioned inside the said 2nd accommodating space.

The nozzle cleaning unit comprises: a cleaning liquid supply line at both ends connected to the first receiving space and the cleaning liquid supply tank; And a cleaning solution recovery line at both ends connected to the second receiving space and the cleaning solution recovery tank, wherein the cleaning solution supply line further includes at least one flow control valve for controlling a flow rate of the cleaning solution flowing along the cleaning solution supply line. It is preferable that it is provided.

The nozzle cleaning unit further includes a cleaning solution circulation line connecting the cleaning solution supply tank and the cleaning solution recovery tank to circulate the cleaning solution recovered in the cleaning solution recovery tank to the cleaning solution supply tank, wherein the cleaning solution circulation line includes a circulation pump. It is preferable to provide.

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.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

FIG. 2 is a schematic structural diagram of a printing apparatus according to an embodiment of the present invention, FIG. 3 is a schematic view seen from the direction 'A' of FIG. 2, and FIG. 4 is partially shown in the 'B' direction of FIG. 3. 5 is a view partially seen in the 'C' direction of Figure 3, Figure 6 is a view for explaining the operation of the clogging inspection unit for inspecting the clogging of the coating nozzle shown in Figure 4, Figure 7 4 is a view for explaining the operation of the nozzle cleaning unit for cleaning the coating nozzle shown in FIG.

As shown in these figures, the printing apparatus 1 according to an embodiment of the present invention, the gravure roll (5, Gravure Roll), the outer surface of the gravure roll 5 (R (Red), G (Green)) Dispenser (10, Dispenser) and gravure roll which can apply any color resist selected from B (Blue) color resist (color ink, color pigment) and move to the correct application area among working positions of gravure roll 5 Doctor blades 30 (Dr. Blade) for removing color resists present in unnecessary areas among the color resists applied to the outer surface of (5) and R, G, B color resists are transferred from the gravure roll (5). A blanket roll 40 for printing at least one of R, G, and B patterns onto the surface of the filter substrate G (hereinafter, referred to as a 'substrate'), and R, G, A work stage 50 through which a print job of at least one of the B patterns proceeds, and a work stay 50, a work table 70 for transferring the substrate (G) to the upper surface, and a lower portion of the base 60 for supporting them.

The gravure roll 5 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 5 and the blanket roll 40 have substantially similar volumes. The gravure roll 5 is rotatable in a corresponding position by a roll driver (not shown) coupled to a pair of left and right support portions 62 fixed to the lower base 60 and standing upright. The gravure roll 5 may be directly coupled to the roll driving unit, or may be coupled to the roll driving unit through a separate pocket (not shown). When the pocket is provided, not only the replacement work of the gravure roll 5 is easy, but there is an advantage that the eccentricity and the horizontal axis of the gravure roll 5 can be easily adjusted.

For reference, as described above with reference to FIGS. 1A and 1B, in printing the R, G, and B patterns on the substrate G, the R, G, and B patterns may not be simultaneously printed on the substrate G through one printing apparatus. Do not. That is, in order to print the R, G, and B patterns on the substrate G, at least three printing apparatuses are provided, and each of the R, G, and B patterns is selected and printed on the substrate G by the three printing apparatuses. .

Therefore, the dispenser 10 which first applies the color resist to the outer surface of the gravure roll 5 by the dispenser 10 has only one color resist selected from the R, G, and B color resists on the outer surface of the gravure roll 5. Application. Expressed easily, the dispenser 10 applies only ink of one color selected from red, green and blue to the outer surface of the gravure roll 5.

Although not shown in detail, the outer surface of the gravure roll 5 is formed with a concave-convex pattern substantially covered with color resist (coated). The uneven pattern at this time may be both embossed or intaglio. In the embossed form, the color resist is applied to the outer surface of the protruding convex and concave portion (not shown) to be transferred to the blanket roll 40. In the engraved form, the color resist is applied to the inside of the recessed recess portion 5a so that the blanket roll Transition to (40).

However, the blanket roll 40 transfers the color resist from the outer surface of the gravure roll 5 and retransfers (prints) it onto the substrate G to form R, G, and B patterns having a shape as shown in FIGS. 1A and 1B. In this case, in order to maintain the thickness of the R, G, and B patterns uniformly from the surface of the substrate G, it may be advantageous that the uneven pattern formed on the outer surface of the gravure roll 5 has a negative shape.

Therefore, in order for the dispenser 10 to apply the accurately selected color resist to the recess 5a formed on the outer surface of the gravure roll 5, the dispenser 10 is applied to the outer surface of the gravure roll 5, that is, the working position (# 1, FIG. 5). Must be easily accessible. In other words, the dispenser 10 should be moved in the longitudinal direction of the gravure roll 5 and moved up and down to approach and space the application area of the gravure roll 5. In order to prevent the nozzle hole 13 from clogging due to the solidification of the color resist, the movement to the clogging inspection unit 80 and the nozzle cleaning unit 90 should also be appropriately made.

Therefore, the dispenser 10 of the present embodiment, as shown in detail in Figure 4, in the state supporting the coating unit 11 and the coating unit 11 for applying the selected color resist to the outer surface of the gravure roll (5) The coating unit 11 is provided with a coating unit support 21 which can move between the work position # 1 and the standby position # 2 so that the color resist can be applied to the outer surface of the gravure roll 5. Here, as shown in detail in FIG. 5, the working position # 1 refers to the outer surface of the gravure roll 5 to which the color resist is applied by the coating unit 11, and the standby position # 2 denotes the coating unit ( 11) is provided in a position away from the gravure roll (5) in order to eliminate the interference that may occur during the movement of the clogging inspection unit 80 and the nozzle cleaning unit 90 to check the clogging and cleaning of the coating unit 11 ) Is the location where it is prepared.

The coating unit 11 receives the color resist from the external ink (color resist) supply unit 7 and serves to spray the color resist substantially on the outer surface of the gravure roll 5. The coating unit 11 includes a unit nozzle 16, a coating nozzle 12 coupled to a lower surface of the unit body 16, and having a nozzle hole 13 for spraying color resist, and a unit body 16. Is coupled to one side of the tube connection portion 14 is connected to the tube (8) for guiding the color resist to the nozzle hole 13, and is coupled to the upper surface of the unit body 16 to the outer surface of the gravure roll (5) An injection amount adjusting unit 15 for adjusting the injection amount of the color resist to be applied is provided.

 As described above, the coating nozzle 12 is a portion to which the color resist is directly applied. The coating nozzle 12 sprays the color resist supplied from the ink supply unit 7 to the outer surface of the gravure roll 5 inside the coating nozzle 12. The nozzle hole 13 is formed. Since the diameter of the nozzle hole 13 has a very fine structure, it is easy to be shielded (blocked) by solidification of the color resist with poor flowability. However, this may properly remove the solidified color resist in the nozzle hole 13 through the clogging inspection unit 80 and the nozzle cleaning unit 90 to be described later.

A tube 8 for sending an appropriate amount of color resist from the ink supply portion 7 to the nozzle hole 13 of the coating nozzle 12 is provided between the ink supply portion 7 and the tube connection portion 14 of the unit body 16. By providing it, a color resist can be apply | coated to the application | coating area | region of the gravure roll 5. At this time, a certain amount of color resist should be injected through the nozzle hole 13 of the coating nozzle 12. To this end, an injection amount adjusting unit 15 for adjusting the injection amount of the color resist is coupled to the upper portion of the unit body 16. .

The injection amount adjusting unit 15 is a part for adjusting the injection amount of the color resist using pneumatic pressure, and a graduation unit (not shown) in which a predetermined unit of scale (not shown) is assigned to adjust the injection amount by adjusting the intensity of the pneumatic pressure is provided. It is prepared. The injection amount adjusting unit 15 is connected to a flow rate control valve (not shown) provided in the unit body 16. By such a configuration, the injection amount adjusting unit 15 generates a desired air pressure using a scale, and adjusts the opening / closing degree of the flow control valve using the generated air pressure to the outside through the nozzle hole 13. The amount of color resist applied can be controlled.

In this way, the coating unit 11 having such a configuration can apply the correct amount of color resist on the gravure roll 5. However, what should be preceded by this should be exactly movable to the working position (# 1) of the outer surface of the gravure roll 5 to which the coating unit 11 is to apply. Therefore, in the printing apparatus 1 of this embodiment, Dispensing unit support portion 21 which allows the unit 11 to move between the working position # 1 and the standby position # 2, and also enables movement to a predetermined dispensing area along the working position # 1. ).

The coating unit support part 21 of this embodiment is slidably movable to the rail body 22 and the rail body 22 which are fixedly arranged in parallel with the gravure roll 5 at a position adjacent to the gravure roll 5. And a rail block 23 (Rail Block) movable in the longitudinal direction of the gravure roll 5, the elevating drive unit 25 for raising and lowering the coating unit 11 with respect to the outer surface of the gravure roll 5; Both ends are coupled to the elevating drive unit 25 and the rail block 23, and the coating unit 11 coupled to the elevating drive unit 25 rotates between the working position # 1 and the atmospheric position # 2. Rotating connection arm 29 is rotatably connected to the rail block 23 so as to move while moving.

As shown in FIG. 4, the rail block 23 has a length of the rail body 22 so that the coating unit 11 mounted on the coating unit support 21 can move along the longitudinal direction of the gravure roll 5. In addition to moving along the direction, it serves to rotate the pivotal connection arm 29 connected to the elevating drive unit 25 around the rotation axis (not shown) provided in the rail block 23. To this end, the arm rotation motor for rotating the rotation connecting arm 29 from the working position (# 1) to the standby position (# 2) or vice versa in the coupling area of the rail block 23 and the rotation connecting arm (29) 24 is provided.

In addition, the rail block 23 is connected to a linear motor (not shown, linear motor) to slide in an almost vibration-free state along the longitudinal direction of the rail body 22. The rail block 23 may move in a linear motion state along the longitudinal direction of the gravure roll 5 by the linear motor.

The elevating driving unit 25 is fixed to one end of the pivoting connecting arm 29 so that the application unit 11 can move up and down to the outer surface of the gravure roll 5, that is, the application area while the application unit 11 is mounted. Fixed block 26 to be coupled, and moving block 27 is coupled to the fixed block 26 to enable the lifting and lowering movement relative to the fixed block 26 in a state supporting the coating unit 11, and A sliding drive unit 28 coupled to each of the fixed block 26 and the moving block 27 between the block 26 and the moving block 27 to slide the moving block 27 with respect to the fixed block 26 is provided. do.

At this time, when the coating unit 11 moves up and down with respect to the outer surface of the gravure roll (5) to move smoothly can be performed more precise. Sliding drive unit 28 for sliding the moving block 27 relative to the fixed block 26 for performing the coating operation is provided with a linear motor close to vibration-free, so that the coating unit 11 is a linear motion (Linear motion) You can get up and down in the state.

 In this way, the dispenser 10 including the coating unit 11 and the coating unit support 21 may be applied so that the color resist can be applied to the work position # 1 formed along the longitudinal direction of the gravure roll 5. Not only position control is possible, but also the movement is precise, and the improved coating operation can be performed.

In the coating unit 11, on the other hand, since the color resist is a highly viscous material having poor flowability, the work may not proceed or the color resist may solidify in the coating nozzle 12 while the work is in progress. When such a phenomenon occurs, the outer surface of the gravure roll 5 may be contaminated by applying a color resist containing particles to the outer surface of the gravure roll 5, and may also cause a phenomenon such as aggregation of the color resist. For this reason, the printing apparatus 1 of this embodiment, as shown in Fig. 5, the clogging inspection unit for inspecting the blockage due to the solidification of the color resist in the outer region of the gravure roll 5, that is, the standby position (# 2) 80 and a nozzle cleaning unit 90 for cleaning the inside of the coating nozzle 12 are provided.

First, before explaining the clogging inspection unit 80 and the nozzle cleaning unit 90, the application method 11 moves (rotates) from the working position (# 1) to the standby position (# 2). In general, after the application unit 11 of the dispenser 10 moves to the starting point of the working position # 1, the driving force of the arm rotation motor 24 provided in the rail block 23 as described above. As a result, the application unit 11 can be moved (rotated) to the standby position # 2 by rotating the pivotal connection arm 29.

As illustrated in FIG. 6, the clogging inspection unit 80 includes an optical sensor 81 that detects whether the coating nozzle 12 is blocked using light, and a color that falls from the coating nozzle 12 during the clogging inspection. A recovery container 82 for recovering resist (waste ink) is provided.

The optical sensor 81 projects the light onto the color resist falling from the nozzle hole 13 to check whether the nozzle hole 13 is clogged by detecting the amount of light reflected back from the projected light. You can judge. In more detail, when the color resist falls, the light emitted by the optical sensor 81 is returned to the color resist after being reflected, but the inside of the coating nozzle 12 is blocked, so that the color resist passes through the nozzle hole 13. If it does not fall, it may be determined that the nozzle hole 13 is blocked because the light emitted by the optical sensor 81 does not return again. At this time, in order to prevent the surrounding area from being contaminated by the falling color resist, a collecting container 82 is provided in the lower region of the coating unit 11 in which the color resist falls, and the color resist falling from the coating nozzle 12 is recovered. do.

If the nozzle hole 13 is blocked after determining whether the nozzle hole 13 is clogged, the position of the dispenser 10 is readjusted to move to the nozzle cleaning unit 90 provided in the side region of the blockage inspection unit 80. .

The nozzle cleaning unit 90 according to the present embodiment accommodates the cleaning liquid 91 so as to partially immerse the coating nozzle 12 to clean the color resist (waste ink) in the solidified state existing in the coating nozzle 12. The second accommodating space 94 is disposed outside the first accommodating space 93 and the first accommodating space 93 to accommodate the cleaning liquid 91 overflowed from the first accommodating space 93. Cleaning liquid used for cleaning the cleaning cylinder 92 formed, the cleaning liquid supply tank 95 for supplying the cleaning liquid 91 to the first accommodation space 93 of the cleaning cylinder 92, and the coating nozzle 12. A cleaning liquid recovery tank 97 for recovering 91 is provided.

In addition, the nozzle cleaning unit 90 includes a cleaning liquid supply line L1 connecting the first receiving space 93 of the cleaning cylinder 92 and the cleaning liquid supply tank 95, the second receiving space 94, and the cleaning liquid. A cleaning liquid recovery line L2 connecting the recovery tank 97 and a cleaning liquid circulation line L3 connecting the cleaning liquid recovery tank 97 and the cleaning liquid supply tank 92 are further provided.

The cleaning cylinder 92 has a cylindrical shape, and as described above, the cleaning cylinder 92 surrounds the first accommodating space 93 and the first accommodating space 93 and is formed outside the first accommodating space 93. It is divided into a receiving space (94). As shown in FIG. 7, the first storage space 93 is supplied with the cleaning liquid 91 through the supply port 93a of the lower surface thereof. The cleaning liquid 91 is continuously supplied to the first accommodating space 93 for cleaning the nozzle hole 13, and the cleaning liquid 93 filling the upper portion of the first accommodating space 93 due to the continuous supply of the cleaning liquid 91 is provided. ) Overflows to the second receiving space (94). By this principle, the cleaning liquid 91 existing in the upper portion of the first receiving space 93 in which the coating nozzle 12 is partially immersed is moved to the second receiving space 94 while cleaning the coating nozzle 12. The purity of the cleaning liquid 91 continues from the lower portion of the first accommodating space 93 to the upper direction to clean the coating nozzle 12 cleanly.

The washing liquid 91 overflowed from the first accommodating space 93 to the second accommodating space 94 has a washing liquid recovery line L2 connected to a collecting port 94a provided at a lower surface of the second accommodating space 94. As a result, the cleaning liquid recovery tank 97 is recovered.

The cleaning liquid recovery tank 97 includes a concentration meter (not shown) for measuring the concentration of the cleaning liquid 91. The cleaning liquid 91 in the cleaning liquid recovery tank 97 is discharged to the outside through a discharge port (not shown) provided in the cleaning liquid recovery tank 97 when the concentration exceeds a predetermined concentration, and is smaller than the predetermined concentration. After circulating again along the cleaning liquid circulation line (L3) is moved to the cleaning liquid supply tank (95). In this case, a circulating pump 98 is provided in the cleaning solution circulation line L3 connecting the cleaning solution recovery tank 97 and the cleaning solution supply tank 95 so that the cleaning solution 91 moves to the cleaning solution supply tank 95. The cleaning liquid 91 at 97 moves smoothly to the cleaning liquid supply tank 95.

The cleaning liquid supply tank 95 supplies the cleaning liquid 91 circulated from the cleaning liquid recovery tank 97 to the cleaning cylinder 92 or supplies the cleaning liquid 91 through an inlet (not shown) provided in the cleaning liquid supply tank 95. It receives the supply and serves to supply to the washing tub (92). However, in the cleaning solution supply line (L1) connecting the cleaning solution supply tank (95) and the first receiving space (93) of the cleaning container (92), a flow control valve (99) for controlling the amount of the cleaning solution (91) is provided. The amount of the washing liquid 91 can be supplied to the washing cylinder 92.

The nozzle cleaning unit 90 having such a configuration can clean the blocked portion of the nozzle hole 13 cleanly, and also has a structure in which the cleaning liquid 91 is recycled to be used to reduce the cost required for cleaning. Can be saved.

As described above, the working position # 1 of the gravure roll 5 and the working position # 1 of the gravure roll 5 and the working position # 1 provided on the outer side of the gravure roll 5 are correct. The gravure roll 5 is more conventionally provided by the dispenser 10 which moves efficiently and efficiently, and the clogging inspection unit 80 and the nozzle cleaning unit 90 which inspect and clean the inside of the application nozzle 12 of the dispenser 10. In addition to improving the efficiency of the coating on the outer surface of the particle (Particle) can be applied to the color resist is removed to improve the sophistication of the work.

Meanwhile, the blanket roll 40 receives the color resist applied in the recess 5a formed on the outer surface of the gravure roll 5 and then moves to the work stage 50 to transfer it onto the substrate G. It serves to substantially print the R, G, and B patterns as shown in 1a and 1b.

On the outer surface of the blanket roll 40, a sheet (not shown) in which color resist is transferred from the gravure roll 5 is wound. Of course, the sheet used more than the number of times the appropriate limit has to be replaced, so the blanket roll 40 is further provided with a sheet replacement means (not shown) for easy replacement of the sheet. The sheet replacement means serves to provide a certain tension to the sheet so that the sheet can be easily replaced, while the sheet is unfolded and stretched and wound on the outer surface of the blanket roll 40.

The blanket roll 40 must be accessible and spaced apart from the gravure roll 5 as well as able to rotate on the top surface of the substrate G loaded on the work stage 50. To this end, on both sides of the blanket roll 40, the drive unit for moving the blanket roll 40 in a linear direction on a side rail (not shown) of the lower base 60 as well as rotating the blanket roll 40 at the corresponding position ( Not shown). At this time, the structure for moving the blanket roll 40 by the driving unit may be applied to linear motion (Linear motion), etc. capable of precise control.

On the other hand, the work stage 50 is a place where the printing operation of the R, G, B pattern on the substrate G proceeds, and the work table 70 serves to transfer the substrate G to the work stage 50. In charge. In recent years, since the process operation using the 8th generation board | substrate G whose width | variety and the width | variety of a width | variety and a longitudinal are 2 or more progresses, it is difficult to convey the board | substrate G by a simple adsorption method. Therefore, as an alternative to this, a method of transferring the substrate G after floating the substrate G is under study, and this transfer method is applied to the work table 70.

Hereinafter, the operation of the printing apparatus having such a configuration will be described.

First, the substrate G, which is the workpiece, is transferred to the work stage 50 through the work table 70 before the color resist is applied to the gravure roll 5. After the alignment of the substrate G is completed at the work stage 50, a process of applying color resist to the gravure roll 5 is started. At this time, in order to reduce the tact time required for the work, the step of transferring the substrate G to be seated on the work stage 50 and the application of the color resist to the gravure roll 5 may be performed simultaneously. something to do.

At this time, in order to apply the color resist to the gravure roll 5, the dispenser 10 in the initial position of the standby position # 2 or the working position # 1 moves to the application starting point of the gravure roll 5. The dispensing unit 11 of the dispenser 10 has a rotating connecting arm 29 which can be rotated with respect to the rail block 23 so that the dispensing unit 11 can be moved from the standby position # 2 to the working position # 1 or the like. You can move it backwards.

After the application unit 11 moves to the application starting point of the gravure roll 5, the application unit 11 mounted on the elevating drive unit 25 is lowered to the upper application area by the operation of the sliding drive unit 28. Thereafter, the color resist supplied from the ink supply unit 8 is applied through a nozzle hole 13 of the application nozzle 12 in a predetermined amount, and when the application of the color resist proceeds, the application unit 11 is applied to the rail body 22. By moving the rail block 23 relative to the gravure roll 5, the color resist may be evenly applied to the coating area of the gravure roll 5.

After the coating operation, the coating unit 11 is elevated by the elevating drive unit 25, and then returns to the coating start point by the movement of the rail block 23 relative to the rail body 22. Thereafter, the arm rotating motor 24 provided in the rail block 23 for cleaning the inside of the coating nozzle 12 of the coating unit 11 moves the coating unit 11 to the standby position at the starting point of the application position # 1. Rotate to (# 2). As described above, the coating unit 11 can move between the standby position (# 2) and the working position (# 1) because the pivoting connection arm 29 is rotatable about the rotation axis (not shown) of the rail block (23). have.

Subsequently, in order to check whether the nozzle hole 13 is clogged, light is projected to the area | region below the coating nozzle 12 using the optical sensor 81 of the blockage | blocking test | inspection part 80. FIG. At this time, the color resist flows along the nozzle hole 13, and it is checked whether the light emitted by the optical sensor 81 meets the flowing color resist. However, if it is blocked or if less than a certain amount flows, check the amount of reflected light to determine the degree of blockage. At this time, the color resist which flowed for inspection of clogging is collect | recovered in the collection container 82 provided in the lower part.

Thereafter, the coating unit 11 moves to the nozzle cleaning unit 90 adjacent to the clogging inspection unit 80 by adjusting the position, and descends by the operation of the sliding driving unit 28 provided in the elevating driving unit 25. The coating nozzle 12 is partially immersed in the first accommodation space 93 of 92. When cleaning of the coating nozzle 12 is completed, the coating nozzle 12 is elevated by the operation of the sliding drive unit 28 to stand by at the standby position (# 2) or immediately to the working position (# 1) for the coating operation. After moving, the above-described operation is repeated substantially the same.

On the other hand, the color resist applied on the gravure roll 5 is diffused to the pattern portion formed on the gravure roll 5 by the doctor blade 30 mounted on the support portion 62, and the color resist present on the unnecessary portion is the doctor It is removed by the blade 30.

By this process, the color resist to be applied may be filled only in the recess 5a provided on the outer surface of the gravure roll 5. Thereafter, the blanket roll 40 moves in the direction of the gravure roll 5 to which a predetermined color resist is applied, and the gravure roll 5 and the blanket roll 40 are in contact with each other and rotate in opposite directions to each other. The color resist formed on the outer surface of (5) is transferred to the blanket roll 40.

The blanket roll 40 moves on the substrate G aligned with the work stage 50 by using a driving force provided by a driving unit (not shown), and the predetermined roll transferred to the gravure roll 5. The process of printing the color resist on the substrate G is roughly completed by transferring the color resist pattern to the substrate G again.

As described above, according to the present embodiment, color resist can be applied to the application area of the gravure roll 5 accurately and efficiently by the movable dispenser 10, and particles are removed by the nozzle cleaning unit 90. The fineness of the work can be improved by applying the color resist in the finished state.

In the above-described embodiment, the air pressure is used to control the injection amount of the color resist injected along the nozzle hole, but in some cases, the injection amount may be adjusted by other pressure such as hydraulic pressure instead of pneumatic pressure. .

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 dispenser can effectively move to the application area of the gravure roll without interference with the surrounding structure, and also improve the application efficiency of the color resist to the gravure roll.

Claims (16)

A gravure roll for transferring the color resist to an outer surface of a blanket roll for printing the color resist to the surface of the substrate; And An application unit for applying the color resist to the outer surface of the gravure roll, and the application unit to move between a working position for applying the color resist to the outer surface of the gravure roll and a standby position deviated from the gravure roll. It includes a dispenser having a coating unit support for supporting the, The coating unit support, A rail body fixedly disposed in parallel with the gravure roll at a position adjacent to the gravure roll; A rail block coupled to the rail body to be slidably movable along the longitudinal direction of the gravure roll; And And a rotation connection arm for rotatably connecting the application unit with respect to the rail block so that the application unit can move while rotating between the work position and the standby position, which are arranged to cross each other. delete The method of claim 1, And an arm rotation motor is provided at an engagement region of the rotation connecting arm and the rail block. The method of claim 1, One side is coupled to the coating unit and the other side is coupled to one end of the pivoting connection arm, and further comprising a lifting and lowering driving unit for raising and lowering the coating unit so that the coating unit is accessible and spaced apart from the gravure roll. Characterized in that the printing apparatus. The method of claim 4, wherein The elevating drive unit, A fixed block fixed to one end of the pivotal connection arm; A moving block coupled to the fixed block to move up and down relative to the fixed block while supporting the coating unit; And And a sliding driving unit coupled to the fixed block and the moving block, respectively, to move the movable block relative to the fixed block. The method of claim 1, The coating unit, Unit body; A coating nozzle coupled to one side of the unit body and having a nozzle hole in which the color resist is injected; And And a tube connection portion coupled to the other side of the unit body and to which a tube for guiding the color resist to the nozzle hole is connected. The method of claim 6, The unit body is a printing apparatus, characterized in that further coupled to the injection amount adjusting unit for adjusting the injection amount of the color resist is injected through the nozzle hole. The method of claim 6, The printing apparatus is provided in the standby position, characterized in that it further comprises a clogging inspection unit for inspecting the clogging of the nozzle hole of the coating unit. The method of claim 8, The clogging inspection unit includes an optical sensor that projects light toward the color resist injected through the nozzle hole and senses whether the nozzle hole is blocked by reflecting the projected light. Characterized in that the printing apparatus. The method of claim 9, The clogging inspection unit further comprises a recovery container for recovering the color resist injected through the nozzle hole to sense whether the nozzle hole is blocked. The method of claim 6, And a nozzle cleaner provided at the standby position and partially cleaning the coating nozzle to prevent the nozzle hole from being blocked by the solidified color resist. The method of claim 11, The nozzle cleaning unit, A cleaning container forming a first accommodating space in which the coating nozzle is partially immersed, and filled with a cleaning liquid for cleaning the coating nozzle in the first accommodating space; A cleaning liquid supply tank for supplying the cleaning liquid to the first accommodation space of the cleaning cylinder; And And a cleaning liquid recovery tank for recovering the cleaning liquid used for cleaning the coating nozzle. The method of claim 12, And a second accommodating space, which is separated from the first accommodating space and accommodates the washing liquid overflowed from the first accommodating space, is formed in the washing tub. The method of claim 13, The washing tub is cylindrical in shape, The printing apparatus according to claim 1, wherein the first accommodating space is disposed inside the second accommodating space. The method of claim 13, The nozzle cleaning unit, A cleaning liquid supply line at both ends connected to the first receiving space and the cleaning liquid supply tank; And Both ends include a cleaning liquid recovery line connected to the second receiving space and the cleaning liquid recovery tank, And the at least one flow control valve for controlling the flow rate of the cleaning liquid flowing along the cleaning liquid supply line in the cleaning liquid supply line. The method of claim 12, The nozzle cleaning unit further includes a cleaning solution circulation line connecting the cleaning solution supply tank and the cleaning solution recovery tank to circulate the cleaning solution recovered in the cleaning solution recovery tank to the cleaning solution supply tank. And a circulation pump is provided in the cleaning solution circulation line.

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