A printing apparatus for large size glass substrates and a method of using the same

Abstract

The present application relates to the field of display panel production, and particularly relates to a printing device for large-size glass substrates and a use method thereof, comprising a sealed cavity, an air floating platform, an alignment device, a printing device, a moving device, an ink pressing device, a wiping device, a jet inspection device and a calibration device; wherein the alignment device is used for rough positioning and fine positioning of the glass substrate to capture the Mack mark of the glass substrate; the ink pressing device is used for ink pressing of the jet head after printing; the wiping device is used for wiping and detecting the jet head; the jet inspection device is used for detecting the jet hole state of the jet head; and the calibration device is used for correcting the position of the jet head, which can satisfy the printing of large-size glass substrates and can realize efficient and accurate printing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of display panel production, in particular to a printing device for large-size glass substrates and a method for using the same. BACKGROUND

[0002] With the progress of technology and the increase of market demand, large-size glass substrates are increasingly widely used, for example, in the fields of flat panel display, architectural decoration, etc. However, how to efficiently and accurately print patterns on large-size glass substrates has been a technical problem. SUMMARY

[0003] The present application aims to provide a printing device for large-size glass substrates, which can print on large-size glass substrates and achieve efficient and accurate printing.

[0004] Another object of the present application is to provide a method for using a printing device for large-size glass substrates, which can print on large-size glass substrates and achieve efficient and accurate printing.

[0005] The technical solution of the present application is as follows:

[0006] A printing device for large-size glass substrates comprises a sealed cavity, and further comprises:

[0007] An air floating platform is arranged in the sealed cavity, and the upstream and downstream of the air floating platform are non-printing areas, and the middle stream is a printing area;

[0008] An alignment device is used to coarsely position and finely position a glass substrate to capture a Mack mark of the glass substrate when the glass substrate is conveyed to the printing area;

[0009] A printing device is arranged in the sealed cavity, and the printing device comprises a multi-nozzle PACK group integrated by a plurality of nozzles, which is used to print patterns on the glass substrate;

[0010] A moving device is arranged in the sealed cavity, and the moving device is connected with the printing device and used to move the printing device;

[0011] An ink pressing device is arranged in the sealed cavity, and when the moving device moves the printing device to directly above the ink pressing device, the ink pressing device is used to press ink on the nozzles after printing is completed;

[0012] A wiping device is arranged in the sealed cavity and used to wipe and detect the nozzles;

[0013] A nozzle detection device is arranged in the sealed cavity and used to detect the nozzle hole state of the nozzles.

[0014] A calibration device is arranged in the sealed cavity for correcting the position of the nozzle.

[0015] Further, the alignment device comprises:

[0016] A support column assembly for supporting the glass substrate;

[0017] A sensor assembly for sensing the position of the glass substrate;

[0018] A lifting roller assembly which is capable of lifting the glass substrate when the glass substrate is in position;

[0019] A baffle assembly for pushing the glass substrate to align when the glass substrate is lifted;

[0020] A gripper for fixing the glass substrate when the glass substrate is aligned.

[0021] Further, the printing device comprises:

[0022] A printing trolley on which a plurality of the multi-nozzle PACK groups are arranged for performing pattern printing on the glass substrate;

[0023] A control system, the printing trolley is electrically connected with the control system, and the control system is used for controlling the movement and printing operation of the printing trolley.

[0024] Further, the ink pressing device comprises:

[0025] An ink pressing assembly for applying pressure to the nozzle to press ink;

[0026] A waste ink barrel for collecting the excess ink discharged from the nozzle when the ink pressing assembly presses ink;

[0027] An ink pressing support frame, a leveling plate is arranged on the top of the ink pressing support frame, the ink pressing assembly is arranged on the leveling plate, and the waste ink barrel is arranged in the ink pressing support frame;

[0028] A correction bolt set, the four corners of the leveling plate are bolted with the ink pressing support frame through the correction bolt set, and the correction bolt set is used for adjusting the level of the ink pressing assembly.

[0029] Further, the wiping device comprises:

[0030] A wiping assembly for wiping the nozzle;

[0031] A wiping paper changing mechanism for changing the wiping paper;

[0032] A detection assembly is arranged to detect whether the spray head is clean.

[0033] Further, the spray detection device comprises:

[0034] A spray detection film replacement mechanism is arranged to replace the spray detection film.

[0035] A spray detection assembly is arranged to detect whether the spray hole of the spray head is blocked.

[0036] Further, the calibration device adopts a drop observation instrument.

[0037] Further, the ink pressing assembly comprises an ink pressing box arranged to store ink pressing material.

[0038] The ink pressing box is internally provided with a tapered surface structure facilitating waste ink discharge, and the outlet end at the bottom of the tapered surface structure is in communication with the waste ink barrel.

[0039] Further, the ink pressing assembly is arranged in plurality, and the ink pressing assembly is arranged in one-to-one correspondence with the multi-spray head PACK group.

[0040] Compared with the prior art, the beneficial effects of the present application are:

[0041] In the present application, after a large-size glass substrate is conveyed to the printing area of the air floating platform, the glass substrate is accurately positioned by the alignment device, and then the printing device performs printing on the glass substrate. The glass substrate is fed once, and the printing device prints once, until the printing is completed. After the printing is completed, in order to ensure the quality of the ink, the printing device is moved to the upper side of the ink pressing device by the moving device to perform ink pressing operation. The ink pressing device can apply pressure to multiple spray heads to discharge excess ink, and then the wiping device is used to clean and wipe the spray heads to avoid the ink at the spray heads from drying and blocking the spray heads. Then, the spray detection device is used to detect whether the spray hole of the spray head is blocked. Finally, the calibration device is used to adjust the position of the spray head, so that the ideal effect can be achieved every time the printing is performed, and the large-size glass substrate can be accurately and efficiently printed. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0043] Figure 1 The axis measurement drawing of the printing device of the present application;

[0044] Figure 2 The structural schematic diagram of the air floating platform of the present application;

[0045] Figure 3 Structure diagram of the alignment device of the present application;

[0046] Figure 4 Top view of the alignment device of the present application;

[0047] Figure 5 Top view of the alignment device of the present application;

[0048] Figure 6 Structure diagram of the ink pressing device of the present application;

[0049] Figure 7 Structure diagram of the wiping device of the present application;

[0050] Figure 8 Structure diagram of the wiping device of the present application;

[0051] Figure 9 Structure diagram of the wiping device of the present application;

[0052] Figure 10 Structure diagram of the ink pressing device of the present application;

[0053] Figure 11 Structure diagram of the ink pressing device of the present application;

[0054] Figure 12 Structure diagram of the ink pressing device of the present application;

[0055] Figure 13 Structure diagram of the ink pressing device of the present application;

[0056] In the figure:

[0057] 100-sealing cavity; 200-alignment device; 300-alignment device; 400-air floating platform; 500-printing device; 600-ink pressing device; 700-wiping device; 800-ink inspection device; 900-calibration device;

[0058] 201-lifting roller assembly; 202-glass sensor; 203-baffle assembly; 204-edge sensor; 205-support column assembly; 206-clamp;

[0059] 301-alignment device; 3011-crossed roller guide rail; 302-mounting bottom plate; 303-intermediate rotating assembly; 304-magnetic grid assembly; 305-guide rail mounting plate;

[0060] 410-non-printing area; 420-printing area;

[0061] 501-multi-nozzle PACK group; 502-nozzle

[0062] 601-ink pressing assembly; 602-waste ink barrel; 603-ink pressing support frame; 604-correction bolt set; 605-ink pressing box; 606-leveling plate;

[0063] 701-wiping strip assembly; 702-first air cylinder; 703-wiping sensor assembly; 704-wiping moving assembly; 705-buffer assembly; 706-wiping fixing assembly; 707-detecting assembly;

[0064] 801-material shaft detecting assembly; 802-second air cylinder; 803-spraying detecting moving assembly; 804-film supporting rod; 805-spraying detecting locking assembly; 806-spraying detecting observing assembly; 807-spraying detecting fixing assembly; 808-line scanning camera assembly;

[0065] 901-ink receiving disc assembly; 902-lifting assembly; 903-camera assembly. DETAILED DESCRIPTION

[0066] In order to make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0067] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0068] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0069] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly used when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0070] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0071] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0072] Some embodiments of the application will be described in detail below with reference to the accompanying drawings. The following examples and features in the examples can be combined with each other without conflict.

[0073] Example 1

[0074] Reference Figures 1-13 The present embodiment provides a printing device for large-size glass substrates, comprising a sealed cavity 100, further comprising:

[0075] An air floating platform 400 is arranged in the sealed cavity 100, and the upstream and downstream of the air floating platform 400 are non-printing areas 410 and the middle stream is a printing area 420;

[0076] An alignment device 200 is used to coarsely position and finely position the glass substrate to capture the Mack mark of the glass substrate when the glass substrate is conveyed to the printing area 420;

[0077] A deviation adjusting device 300 is used to adjust the flatness and parallelism of the glass substrate when the alignment of the glass substrate is completed;

[0078] A printing device 500 is arranged in the sealed cavity 100, and the printing device 500 comprises a multi-nozzle PACK group 501 integrated by a plurality of nozzles 502, which is used for pattern printing on a glass substrate;

[0079] A moving device is arranged in the sealed cavity 100, and the moving device is connected with the printing device 500 and used for moving the printing device 500. The moving device comprises an x-axis linear module, a y-axis linear module and a z-axis linear module connected with each other, so as to drive the printing device 500 to move. It should be noted that the structure of the moving device belongs to the prior art, and will not be described here.

[0080] An ink pressing device 600 is arranged in the sealed cavity 100, and the ink pressing device 600 is used for pressing ink on the nozzles 502 after printing when the moving device drives the printing device 500 to move to the upper side of the ink pressing device 600.

[0081] A wiping device 700 is arranged in the sealed cavity 100, and the wiping device 700 is used for wiping and detecting the nozzles 502.

[0082] A spray detection device 800 is arranged in the sealed cavity 100, and the spray detection device 800 is used for detecting the state of the spray holes of the nozzles 502.

[0083] A calibration device 900 is arranged in the sealed cavity 100, and the calibration device 900 is used for correcting the position of the nozzles 502.

[0084] Specifically, the air floating platform 400 is a special support platform, and the working principle thereof is mainly to generate air flow at the bottom of the platform to form an air film, so that the platform can be suspended at a certain height. This design can significantly reduce or eliminate physical contact and friction, and is suitable for supporting large-size glass substrates to achieve high-precision positioning and reduce vibration interference.

[0085] In combination with Figures 2-3 The alignment device 200 comprises:

[0086] A support column assembly 205 comprises a plurality of liftable support columns (or Pin columns), which are used for supporting the glass substrate.

[0087] A sensor assembly is used for sensing the position of the glass substrate.

[0088] A lifting roller assembly 201 (Roller assembly) comprises a plurality of liftable rollers, and when the glass substrate is in place, the plurality of rollers of the lifting roller assembly 201 are lifted to lift the glass substrate. Preferably, the lifting roller assembly 201 comprises three liftable rollers.

[0089] Banker assembly 203, used to push the glass substrate to align when it is lifted up;

[0090] Clamp 206, used to fix the glass substrate after it is aligned.

[0091] The deflection device 300 includes a mounting plate 302, an intermediate rotating assembly 303, a deflection assembly 301, a magnetic grid assembly 304, and a guide rail mounting plate 305. The intermediate rotating assembly 303 is located in the middle of the mounting plate 302 as an intermediate rotating shaft. The deflection assembly 301 is arranged on both sides of the intermediate rotating assembly 303. The magnetic grid assembly 304 is arranged at both ends of the mounting plate 302. The deflection assembly 301 includes a cross roller guide 3011. The deflection device 300 tilts the cross roller guide by a certain angle to help rotate the glass substrate, so as to adjust the flatness and parallelism of the glass substrate.

[0092] The alignment device 200 is used in combination with the deflection device 300 to achieve precise positioning of the glass substrate, including the following steps:

[0093] 1. Initial placement and sensing: First, the glass substrate is conveyed to the printing area 420 inside the printing device, where it is placed on some small support columns. At this time, the sensor assembly is used to confirm whether the glass substrate has arrived correctly. The sensor assembly includes two sensors, namely the edge sensor 204 and the glass sensor 202.

[0094] 2. Rough positioning: Next, the three rollers are raised to gently lift the glass substrate, while the support columns are lowered. Then the glass substrate is pushed by the Banker assembly 203 to move to the correct position. When the edge sensor 204 confirms the glass position again, it will be turned off, indicating that this step is complete. Finally, a clamp 206 is used to vacuum adsorb the glass substrate. Then the lifting roller assembly 201 is lowered, and the Banker assembly 203 is returned to its original position.

[0095] 3. Fine adjustment: In order to accurately print the pattern on the glass substrate, some fine adjustments are needed. A special track (cross roller guide 3011) is used here. The deflection device 300 can tilt the cross roller guide by an angle of 3° to help rotate the glass substrate. If clockwise rotation is required, the two deflection devices 300 are moved to the right together; otherwise, they are moved to the left. In this way, the glass substrate can be completely flat and parallel to the printing direction, preparing for subsequent printing. After the mechanical alignment is completed, the camera accurately captures the Mark mark after the rough positioning and fine positioning.

[0096] The mechanical alignment device 200 ensures that the coarse positioning and fine positioning cameras accurately capture the Mark marks, and the bias adjustment device 300 ensures the flatness and parallelism of the glass substrate, thereby achieving accurate printing.

[0097] The printing device 500 comprises:

[0098] A printing trolley is provided with a plurality of the multi-nozzle PACK groups 501, and is used for pattern printing on the glass substrate. The printing trolley or inkjet printing trolley is a prior art structure, and will not be described here.

[0099] A control system is electrically connected with the printing trolley, and is used for controlling the movement and printing operation of the printing trolley.

[0100] The ink pressing device 600 comprises:

[0101] An ink pressing assembly 601 is used for applying pressure to the nozzle 502 to press ink. The ink pressing assembly 601 is provided with eight ink pressing units respectively and one-to-one corresponding to the multi-nozzle PACK groups 501. The ink pressing unit is a modular design, the ink pressing strip on the ink pressing unit is a soft material, and the ink pressing strip is provided with threads.

[0102] A waste ink barrel 602 is used for collecting the excess ink discharged from the nozzle 502 when the ink pressing assembly 601 presses ink.

[0103] An ink pressing support frame 603 is provided with a leveling plate 606 at the top, the ink pressing assembly 601 is arranged on the leveling plate 606, and the waste ink barrel 602 is arranged in the ink pressing support frame 603.

[0104] A correction bolt set 604 is bolted to the four corners of the leveling plate 606 and the ink pressing support frame 603 respectively, and is used for adjusting the level of the ink pressing assembly 601.

[0105] An ink pressing box 605 is used for storing ink pressing materials. The ink pressing box 605 is internally provided with a tapered surface structure for facilitating waste ink discharge. The outlet end at the bottom of the tapered surface structure is in communication with the waste ink barrel 602, so as to facilitate the waste ink to be discharged to the waste ink barrel 602.

[0106] After the glass substrate is conveyed to the printing area 420, the printing trolley performs printing on the glass substrate. The glass substrate is fed once, and the trolley is printed once, until the printing is completed.

[0107] After printing, the printing trolley is moved to the top of the ink pressing assembly 601 by the moving device for ink pressing, the wiping device 700 is used for wiping and cleaning the inkjet head 502, the frequency is 100 printed sheets per cleaning, then the inkjet head 502 is detected by the detection device 800 to check whether the nozzle is blocked, the frequency is one detection per day, and finally the position of the inkjet head 502 is corrected by the calibration device 900.

[0108] The ink pressing process is as follows:

[0109] When the printing trolley moves to the top of the ink pressing assembly 601, the eight ink pressing assemblies 601 correspond to the eight multi-nozzle PACK groups 501 respectively for ink pressing, and the inkjet head 502 is pressed to make the excess ink be discharged and collected into the waste ink tank 602. These ink pressing units adopt a modular design, which can not only effectively remove the ink by the ink pressing strip made of soft material, but also can adjust the level of itself by the correction bolt group 604 to ensure that each inkjet head 502 can be uniformly processed. In summary, sufficient ink pressing is realized by the design of the ink pressing device 600.

[0110] The wiping device 700 comprises:

[0111] The wiping assembly is used for wiping the inkjet head 502.

[0112] The wiping paper changing mechanism is used for changing the wiping paper.

[0113] The detection assembly 707 is used for detecting whether the inkjet head 502 is wiped clean.

[0114] Specifically, the wiping assembly comprises a wiping strip assembly 701, the detection assembly 707 adopts a camera, and when wiping, the moving device moves the multi-nozzle PACK group 501 from one side of the wiping strip assembly 701 to the other side to complete the wiping. Then the multi-nozzle PACK group 501 is moved to the top of the detection assembly 707 to detect whether the inkjet head 502 is wiped clean.

[0115] The wiping paper changing mechanism comprises a first air cylinder 702, a wiping fixed assembly 706, a wiping sensor assembly 703, a wiping moving assembly 704 and a buffer assembly 705. The first air cylinder 702 is arranged on the wiping fixed assembly 706, and the wiping process is as follows:

[0116] When the wiping paper is out of stock, the wiping sensor assembly 703 triggers the sensor to prompt an alarm, the first air cylinder 702 drives the wiping moving assembly 704 to move to the A end of the first air cylinder 702 for changing the stock, and after the stock is changed, the first air cylinder 702 is pushed to the B end, the wiping moving assembly 704 is in contact with the buffer assembly 705 to be fixed, preventing shaking, and the changing of the stock is completed.

[0117] The multi-nozzle PACK group 501 moves from one side of the wiping strip assembly 701 to the other side, completes wiping, and then moves directly above the detection assembly 707, which uses a detection camera to detect whether the nozzle 502 is wiped clean.

[0118] In order to avoid ink drying and clogging the nozzle 502, the printing device is equipped with an automatic wiping device 700, which uses a spool structure driven by double motors (refer to Figure 8 and Figure 9 ) to replace new wiping paper as needed and keep the paper taut throughout the process, ensuring that each wiping can completely remove residues. In addition, there is a detection link to check whether the nozzle 502 is clean using a detection camera to ensure optimal printing results. The wiping device 700 has a buffer area through the buffer assembly 705 to achieve buffering, protect the print head, and overall achieve complete cleaning and detection of the multi-nozzle PACK group 501.

[0119] The spray detection device 800 comprises:

[0120] A spray detection film replacement mechanism for replacing the spray detection film;

[0121] A spray detection assembly for detecting whether the nozzle 502 is clogged.

[0122] Specifically, as Figures 10-12 , the spray detection film replacement mechanism comprises a material shaft detection assembly 801, a second air cylinder 802, a spray detection moving assembly 803, a spray detection fixing assembly 807, a film supporting rod 804, and a spray detection locking assembly 805; the spray detection assembly comprises a spray detection observation assembly 806 and a line-scan camera assembly 808; the spray detection film replacement process is as follows: when the spray detection film is out of material, the material shaft detection assembly 801 will prompt an alarm, the second air cylinder 802 drives the spray detection moving assembly 803 to move to the A end of the second air cylinder 802 for replacement, at this time the film supporting rod 804 supports the spray detection film, the second air cylinder 802 is pushed to the B end after replacement, the film supporting rod 804 is separated from the spray detection film, the spray detection locking assembly 805 is locked with the spray detection observation assembly 806, and the replacement is completed. When a single nozzle 502 is placed directly above the spray detection observation window, the line-scan camera assembly 808 moves to take a photo, an effect diagram is generated, and whether the nozzle 502 is clogged is determined according to whether there are ink dots on the effect diagram.

[0123] The calibration device 900 adopts a drop observation instrument, and the drop observation instrument comprises an ink receiving disc assembly 901, a lifting assembly 902 and a camera assembly 903; the ink receiving disc assembly 901 is used for abutting against the multi-nozzle PACK group 501, the lifting assembly 902 is connected with the camera assembly 903 and is used for adjusting the height of the camera assembly 903. When the multi-nozzle PACK group 501 moves to the position directly above the ink receiving disc assembly 901, the lifting assembly 902 drives the camera assembly 903 to take photos of the nozzles 502 at different positions in the multi-nozzle PACK group 501 respectively, the camera assembly 903 detects by moving up and down of the camera, can be used for correcting the position of the nozzle 502, and can measure the ink drop ejection speed, angle and volume of the nozzle 502 and correct the position of the nozzle 502, so as to solve the problem that the nozzle 502 deviates in use.

[0124] Embodiment 2

[0125] Based on the use method of the printing equipment for the large-size glass substrate, the method comprises the following steps:

[0126] After the large-size glass substrate is conveyed to the printing area 420 of the air floating platform 400, the glass substrate is accurately positioned by the alignment device 200 and the deviation correction device 300.

[0127] The printing device 500 is used for printing on the glass substrate, and the printing device 500 prints once after the glass substrate is fed once, until the printing is completed.

[0128] After the printing is completed, the printing device 500 is moved to the position directly above the ink pressing device 600 by the moving device to perform the ink pressing operation, and the ink pressing device 600 applies pressure to the plurality of nozzles 502 to discharge the excess ink.

[0129] The multi-nozzle PACK group 501 is moved to the wiping device 700 by the moving device, and the wiping device 700 is used for cleaning and wiping the nozzles 502 to avoid the nozzles 502 from being blocked due to the dried ink and to detect whether the nozzles 502 are cleaned.

[0130] The ejection detection device 800 is used for detecting whether the ejection holes of the nozzles 502 are blocked.

[0131] Finally, the position of the nozzle 502 is adjusted by the calibration device 900, so that the ideal effect can be achieved in each printing, and the large-size glass substrate can be accurately and efficiently printed.

[0132] The technical scheme of the present application has the following beneficial effects:

[0133] In the present application, after the large-size glass substrate is conveyed to the printing area 420 of the air floating platform 400, the glass substrate is accurately positioned by the alignment device 200 and the deflection adjusting device 300, and then the printing device 500 performs printing on the glass substrate. The glass substrate is fed once, and the printing device 500 performs printing once, until the printing is completed. After the printing is completed, in order to ensure the quality of the ink, the printing device 500 is moved to the upper side of the ink pressing device 600 by the moving device to perform ink pressing operation. The ink pressing device 600 can apply pressure to the plurality of nozzles 502 to discharge the excess ink, and then the wiping device 700 is used to clean and wipe the nozzles 502 to avoid the nozzles 502 being clogged due to the drying of the ink. Then, the nozzle inspection device 800 is used to detect whether the nozzles 502 are clogged, and finally the calibration device 900 is used to adjust the position of the nozzles 502, so as to ensure that each printing can achieve the ideal effect, and realize accurate and efficient printing on the large-size glass substrate.

[0134] The present application overcomes the limitations in the prior art by introducing advanced mechanical alignment device 200, efficient ink pressing device 600, intelligent nozzle 502 wiping device 700 and reliable nozzle inspection device 800, and ensures the quality and stability of the printing of large-size glass substrate.

[0135] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0136] The above is only the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A printing apparatus for large size glass substrates comprising a sealed cavity (100), characterized in that, Also comprising: An air floating platform (400) arranged in the sealed cavity (100), the upstream and downstream of the air floating platform (400) are non-printing areas (410), and the middle stream is a printing area (420); An alignment device (200) used for rough positioning and fine positioning of the glass substrate to capture the Mack mark of the glass substrate after the glass substrate is conveyed to the printing area (420); A printing device (500) arranged in the sealed cavity (100), the printing device (500) comprises a multi-nozzle PACK group (501) integrated by a plurality of nozzles (502), and is used for pattern printing on the glass substrate; A moving device arranged in the sealed cavity (100), the moving device is connected with the printing device (500) and is used for moving the printing device (500); An ink pressing device (600) arranged in the sealed cavity (100), when the moving device drives the printing device (500) to move to the ink pressing device (600) directly above, the ink pressing device (600) is used for pressing ink on the nozzle (502) after printing is completed; A wiping device (700) arranged in the sealed cavity (100) and used for wiping and detecting the nozzle (502); A spray detection device (800) arranged in the sealed cavity (100) and used for detecting the nozzle state of the nozzle (502); A calibration device (900) arranged in the sealed cavity (100) and used for correcting the position of the nozzle (502); The alignment device (200) comprises: A support column assembly (205) used for supporting the glass substrate; A sensor assembly used for sensing the position of the glass substrate; A lifting roller assembly (201) which is lifted to be able to lift the glass substrate after the glass substrate is in place; A baffle assembly (203) used for pushing the glass substrate for alignment after the glass substrate is lifted; A gripper (206) used for fixing the glass substrate after the glass substrate is aligned; The bias adjusting device (300) comprises a mounting bottom plate (302), an intermediate rotating assembly (303), a bias adjusting assembly (301), a magnetic grid assembly (304), and a guide rail mounting plate (305), the intermediate rotating assembly (303) is located in the middle of the mounting bottom plate (302) as an intermediate rotating shaft, the bias adjusting assembly (301) is arranged on both sides of the intermediate rotating assembly (303), the magnetic grid assembly (304) is arranged at both ends of the mounting bottom plate (302), the bias adjusting assembly (301) comprises a cross roller guide (3011), and the bias adjusting device (300) can rotate the glass substrate by using the angle of inclination of the cross roller guide (3011) to adjust the flatness and parallelism of the glass substrate.

2. The printing apparatus for a large-sized glass substrate according to claim 1, characterized by, The printing device (500) comprises: A printing trolley is provided with a plurality of the multi-nozzle PACK groups (501) for performing pattern printing on a glass substrate. A control system is electrically connected with the printing trolley, and is used for controlling movement and printing operation of the printing trolley.

3. The printing apparatus for large-sized glass substrates according to claim 1, characterized by, The ink pressing device (600) comprises: An ink pressing assembly (601) for applying pressure to the nozzle (502) to perform ink pressing; An ink waste barrel (602) for collecting excess ink discharged from the nozzle (502) when the ink pressing assembly (601) performs ink pressing; An ink pressing support frame (603), a leveling plate (606) is arranged on the top of the ink pressing support frame (603), the ink pressing assembly (601) is arranged on the leveling plate (606), and the ink waste barrel (602) is arranged in the ink pressing support frame (603); A correction bolt set (604), four corners of the leveling plate (606) are bolted with the ink pressing support frame (603) through the correction bolt set (604), and the correction bolt set (604) is used for adjusting the level of the ink pressing assembly (601).

4. The printing apparatus for large-sized glass substrates according to claim 1, characterized by, The wiping device (700) comprises: A wiping assembly for wiping the nozzle (502); A wiping paper changing mechanism for changing wiping paper; A detection assembly (707) for detecting whether the nozzle (502) is wiped clean.

5. The printing apparatus for large-sized glass substrates according to claim 1, characterized by, The ink inspection device (800) comprises: An ink inspection film changing mechanism for changing an ink inspection film; An ink inspection assembly for detecting whether the nozzle (502) is blocked.

6. The printing apparatus for large-sized glass substrates according to claim 1, characterized by, The calibration device (900) adopts an ink drop observation instrument.

7. The printing apparatus for large-sized glass substrates according to claim 3, characterized by, The ink pressing assembly (601) comprises an ink pressing box (605) for storing ink pressing materials. The ink pressing box (605) is internally provided with a tapered surface structure for facilitating ink waste discharge, and an outlet end at the bottom of the tapered surface structure is in communication with the ink waste barrel (602).

8. The printing apparatus for large-sized glass substrates according to claim 3, characterized by, The ink pressing assembly (601) is provided in a plurality of forms and is arranged in one-to-one correspondence with the multi-nozzle PACK group (501).

9. The method of using a printing apparatus for large-sized glass substrates according to any one of claims 1 to 8, characterized in that, The method comprises the following steps: After a large-size glass substrate is conveyed to a printing area (420) of the air floating platform (400), the glass substrate is accurately positioned by the alignment device (200); The printing device (500) performs printing on the glass substrate, the printing device (500) performs printing once for each feeding of the glass substrate until printing is completed; After printing is completed, the printing device (500) is moved to the ink pressing device (600) above to perform ink pressing operation, and the ink pressing device (600) applies pressure to the plurality of nozzles (502) to discharge excess ink; The multi-nozzle PACK group (501) is moved to the wiping device (700) by the moving device, the wiping device (700) washes and wipes the nozzle (502) to avoid ink drying and blocking the nozzle (502), and whether the nozzle (502) is wiped clean is detected. Detecting whether the ejection hole of the ejection head (502) is blocked by the ejection inspection device (800); Finally, the position of the ejection head (502) is adjusted by the calibration device (900), so that the large-size glass substrate is precisely and efficiently printed.

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