High-precision liquid crystal dispensing and vacuum pressing equipment

Abstract

The application belongs to the technical field of liquid crystal screen processing, and particularly relates to high-precision liquid crystal dropping and vacuum pressing equipment, which comprises a processing device and a control system for controlling the processing device, wherein the processing device comprises a first conveying belt and a second conveying belt, a dropping device is arranged on the first conveying belt, a turnover assembly is arranged between the first conveying belt and the second conveying belt, a vacuum pressing device is arranged on the first conveying belt, the vacuum pressing device comprises a first plate fixedly arranged on a fixed column on the side of the first conveying belt, a second plate which can move up and down, and a third plate which can slide horizontally, the first plate, the second plate and the third plate form a sealed vacuum box, an inner wall lower surface of an upper plate of the third plate is provided with an electric telescopic rod, and a pressing strip is arranged at the lower end of the electric telescopic rod. The application can improve the yield of liquid crystal display screen products.

Description

Technical Field

[0001] This invention belongs to the field of liquid crystal display processing technology, specifically relating to high-precision liquid crystal dispensing and vacuum pressing equipment. Background Technology

[0002] Liquid crystal display (LCD) devices are commonly used electronic devices, favored by users due to their low power consumption, small size, and light weight. The liquid crystal display panel is an important component of an LCD monitor. In the production process of liquid crystal displays, after the color filter substrate and array substrate are processed, an appropriate amount of liquid crystal molecules are dripped into the display area of ​​the color filter substrate, and a sealing glue is applied to the corresponding position of the array substrate. Then, under vacuum, the array substrate is aligned and pressed onto the color filter substrate to form the liquid crystal cell of the display screen. After passing quality inspection, the liquid crystal cell assembly process is completed. However, the following problems exist in the production process: Insufficient dripping accuracy: Traditional dripping equipment relies on mechanical pumps to control the flow rate, which is easily affected by fluctuations in liquid crystal viscosity, resulting in a dripping volume deviation of more than ±5%. Specifically, traditional screw pumps or pneumatic valves are contact-type and volumetric metering devices, and their accuracy is greatly affected by the viscosity, temperature, and flowability of the liquid crystal. Moreover, mechanical moving parts have problems such as back suction delay and wear, resulting in poor long-term stability. At the same time, there is a risk of liquid crystal contamination during the liquid crystal dripping process: During the dripping process, liquid crystal particles splash and adhere to the substrate alignment area, causing subsequent cell assembly processes to fail. To address these issues, this invention proposes a high-precision liquid crystal dripping and vacuum pressing device. Summary of the Invention

[0003] The purpose of this invention is to provide a high-precision liquid crystal dispensing and vacuum pressing device, which can improve the yield of liquid crystal display products.

[0004] The specific technical solution adopted by this invention is as follows: A high-precision liquid crystal dispensing and vacuum pressing device includes a processing device and a control system for controlling the processing device. The processing device includes a first conveyor belt and a second conveyor belt. A dispensing device is provided on the first conveyor belt. A flipping component is provided between the first conveyor belt and the second conveyor belt. A vacuum pressing device is provided on the first conveyor belt. The first conveyor belt is used for point-to-point transport of the color filter substrate, and the dispensing device is used for dispensing liquid crystal molecules onto the color filter substrate. The second conveyor belt is used for transporting the array substrate after it has been coated with a sealing adhesive. When the array substrate is transported to a designated position, the flipping component is used to flip the array substrate 180° so that it is aligned with the color filter substrate transported to the vacuum pressing device. The vacuum pressing device includes a first plate fixedly mounted on the side rail of the first conveyor belt, a second plate that moves vertically, and a third plate that slides horizontally. The first plate, the second plate, and the third plate form a sealed vacuum box. The lower surface of the inner wall of the upper plate of the third plate is provided with an electric telescopic rod, and the lower end of the electric telescopic rod is provided with a pressing strip.

[0005] Preferably, the first and second transmission belts are arranged side by side, and each of the first and second transmission belts includes a transverse frame. The transverse frame is movably provided with transmission rods distributed in an equally spaced array. The transmission rods are provided with friction rubber blocks distributed in an equally spaced array. The transverse frame is provided with a transmission chain and sprockets distributed in an alternating manner. The sprockets cooperate with the chain to drive the transmission rods to rotate at the same speed.

[0006] Preferably, the dripping device includes a three-axis moving platform disposed on the transverse frame of the first conveyor belt, the three-axis moving platform being equipped with an integrated piezoelectric ceramic nozzle, an ultrasonic atomizer, and a first CCD industrial camera.

[0007] Preferably, the flipping assembly includes a first flipping motor disposed on the horizontal frame bar, the first flipping motor being horizontally placed, a second flipping motor being installed at the output end of the first flipping motor being vertically disposed, a flipping rod being provided at the output end of the second flipping motor, and an electric suction cup being installed on the flipping rod.

[0008] Preferably, the flipping assembly further includes a first pneumatic telescopic rod disposed at the lower end of the transverse frame bar of the second conveyor belt, and a lifting bar is provided at the upper output end of the first pneumatic telescopic rod, the lifting bar being located between the gaps of the conveyor bars of the second conveyor belt.

[0009] Preferably, the first plate serves as the rear plate of the vacuum box, the second plate, which moves up and down, is integrally U-shaped, and serves as both side plates and the bottom plate of the vacuum box. A second pneumatic telescopic rod is provided at the lower end of the first conveyor belt, and the upper output end of the second pneumatic telescopic rod is connected to the lower surface of the second plate. The two side plates of the second plate slide up and down between the gaps of the conveyor rods. The third plate is bent at 90° and serves as the top plate and the front plate of the vacuum box. A slide rail is provided on a transverse frame of the first conveyor belt, and the lower end of the front plate of the third plate slides laterally on the slide rail. A third pneumatic telescopic rod is provided on a transverse frame of the first conveyor belt, and the output end of the third pneumatic telescopic rod is connected to the side wall of the third plate.

[0010] Preferably, a vacuum tube is connected through the side of the first plate, and the vacuum tube is connected to a molecular pump assembly. Rubber strips are provided on the edges of the first plate, the second plate, and the third plate. The rubber strips are hollow and can be used to inject or release air. A positioning block is provided at the top corner of the inner wall of the bottom plate of the second plate.

[0011] Preferably, the first conveyor belt is provided with a quality inspection component, the quality inspection component including a door frame disposed between the dripping device and the vacuum pressing device, and a second CCD industrial camera is mounted on the door frame.

[0012] Preferably, the top plate of the third plate is further provided with a third CCD industrial camera, and the transverse frame of the second conveyor belt is provided with a fourth CCD industrial camera.

[0013] Preferably, the control system includes a detection module, a processing module, and a drive module; In the detection module, the first CCD industrial camera is used to detect the position of the color filter substrate based on machine vision, the second CCD industrial camera is used to detect whether the liquid crystal dispensing of the color filter substrate is qualified based on machine vision, the third CCD industrial camera is used to detect the position of the color filter substrate in the vacuum box based on machine vision, and the fourth CCD industrial camera is used to detect whether the coating of the array substrate with the sealing glue is qualified and the position of the array substrate. The processing module processes the data provided by the detection module and controls the operation of the first conveyor belt, the second conveyor belt, the dripping device, the flipping assembly, and the vacuum pressing device through the drive module.

[0014] The technical effects achieved by this invention are as follows: This invention is highly integrated and automated: it integrates multiple functions such as dripping, quality inspection, flipping, and vacuum pressing into one, realizing full-process automation, greatly reducing manual intervention and turnaround time, improving production efficiency, and reducing the risk of pollution and damage.

[0015] This invention boasts extremely high positioning accuracy: a multi-CCD vision system performs multiple detections and feedback compensations throughout the entire process, combined with a high-precision conveyor belt, ensuring seamless and precise alignment from dispensing to pressing, greatly improving product yield.

[0016] This invention offers superior vacuum pressing quality: its innovative three-plate vacuum chamber design features a compact structure, clever coordination between opening and closing and transmission, excellent sealing, and high vacuuming efficiency, effectively and thoroughly eliminating air bubbles and ensuring the quality of the liquid crystal cell.

[0017] This invention relates to intelligent manufacturing: the control system is based on machine vision to achieve closed-loop control, and has the capabilities of online quality judgment, data traceability and flexible production, which meets the standards of intelligent manufacturing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the high-precision liquid crystal dispensing and vacuum pressing device of the present invention; Figure 2 This is a schematic diagram of the overall structure of the high-precision liquid crystal dispensing and vacuum pressing device of the present invention from another perspective; Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the middle; Figure 4 This is the present invention. Figure 2 Enlarged view of point B in the middle; Figure 5 This is a schematic diagram of the overall structure of the flipping component of the present invention in its working state; Figure 6 This is the present invention. Figure 5 Enlarged view of point C in the middle; Figure 7 This is a schematic diagram of the overall structure of the vacuum pressing device of the present invention in the state of forming a vacuum box; Figure 8 This is a system block diagram of the control system of the present invention.

[0019] The attached diagram lists the components represented by each number as follows: 1. First conveyor belt; 2. Second conveyor belt; 3. Drip device; 4. Tilting assembly; 5. Vacuum pressing device; 6. Quality inspection assembly; 301. Three-axis moving platform; 302. Piezoelectric ceramic nozzle; 303. Ultrasonic atomizer; 304. First CCD industrial camera; 401. First tilting motor; 402. Second tilting motor; 403. Lifting bar; 404. Tilting rod; 405. First pneumatic telescopic rod; 501. First plate; 502. Second plate; 503. Third plate; 504. Electric telescopic rod; 505. Pressing bar; 506. Vacuum tube; 507. Positioning block; 508. Third CCD industrial camera; 509. Second pneumatic telescopic rod; 510. Third pneumatic telescopic rod; 601. Door frame; 602. Second CCD industrial camera; 603. Fourth CCD industrial camera. Detailed Implementation

[0020] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0021] like Figures 1-8 As shown, a high-precision liquid crystal dispensing and vacuum pressing device includes a processing device and a control system for controlling the processing device. The processing device includes a first conveyor belt 1 and a second conveyor belt 2. A dispensing device 3 is provided on the first conveyor belt 1. A flipping component 4 is provided between the first conveyor belt 1 and the second conveyor belt 2. A vacuum pressing device 5 is provided on the first conveyor belt 1. like Figures 1-8 As shown, the first conveyor belt 1 is used for point-to-point transport of the color filter substrate, the dispensing device 3 is used for dispensing liquid crystal molecules onto the color filter substrate, the second conveyor belt 2 is used for transporting the array substrate coated with sealant, and at the designated position of the array substrate, the flipping component 4 is used to flip the array substrate 180° so that it fits against the color filter substrate transported to the vacuum pressing device 5. The vacuum pressing device 5 includes a first plate 501 fixedly mounted on the side rail of the first conveyor belt 1, a second plate 502 that moves up and down, and a third plate 503 that slides laterally. The first plate 501, the second plate 502, and the third plate 503 form a sealed vacuum box; the lower surface of the inner wall of the upper plate of the third plate 503 is provided with an electric telescopic rod 504, and the lower end of the electric telescopic rod 504 is provided with a pressing strip 505.

[0022] Preferably, the first conveyor belt 1 and the second conveyor belt 2 are arranged in parallel. The first conveyor belt 1 and the second conveyor belt 2 both include a transverse frame. The transverse frame is movably provided with equally spaced arrayed transmission rods. The transmission rods are provided with equally spaced arrayed friction rubber blocks. The transverse frame is provided with staggered transmission chains and sprockets. The sprockets cooperate with the chains to drive the transmission rods to rotate at the same speed.

[0023] like Figures 1-8 As shown, in this invention, a first conveyor belt 1 and a second conveyor belt 2 are arranged side by side. The first conveyor belt 1 is used for point-to-point transport of the color filter substrate; the second conveyor belt 2 is used for transporting the array substrate that has been coated with sealant. Both conveyor belts adopt a high-precision synchronous transmission structure, which includes a transverse frame bar, several transmission rods driven by a sprocket and chain system, and friction rubber blocks set on the transmission rods to ensure that the substrate is transported without slippage and with accurate positioning.

[0024] Preferably, the dripping device 3 includes a three-axis moving platform 301 disposed on the transverse frame of the first conveyor belt 1. The three-axis moving platform 301 is provided with an integrated piezoelectric ceramic nozzle 302, an ultrasonic atomizer 303, and a first CCD industrial camera 304.

[0025] like Figures 1-8 As shown, the color filter substrate and the array substrate are precisely transported to their respective workstations by the first transport belt 1 and the second transport belt 2, respectively; liquid crystal dispensing: the first transport belt 1 transports the color filter substrate to the dispensing device 3. The first CCD industrial camera 304 identifies the substrate reference mark, and the three-axis moving platform 301 drives the piezoelectric ceramic nozzle 302 to move precisely, dispensing liquid crystal according to the preset pattern.

[0026] A piezoelectric ceramic nozzle 302 is provided for precision jetting of liquid crystal; an ultrasonic atomizer 303 is provided to control the local environment and prevent liquid crystal evaporation.

[0027] Liquid crystal dispensing quality inspection: The color filter substrate that has completed dispensing continues to move forward and passes through the quality inspection gate 601, where it is photographed by the second CCD industrial camera 602 to analyze the liquid crystal dispensing volume, uniformity, and whether the pattern is correct.

[0028] Preferably, the flipping assembly 4 includes a first flipping motor 401 disposed on the transverse frame bar, the first flipping motor 401 is horizontally placed, a second flipping motor 402 is installed at the output end of the first flipping motor 401, the second flipping motor 402 is vertically disposed, a flipping rod 404 is provided at the output end of the second flipping motor 402, an electric suction cup is installed on the flipping rod 404, the flipping assembly 4 also includes a first pneumatic telescopic rod 405 disposed at the lower end of the transverse frame bar of the second conveyor belt 2, a lifting bar 403 is provided at the upper output end of the first pneumatic telescopic rod 405, the lifting bar 403 is located between the gaps of the conveyor rods of the second conveyor belt 2.

[0029] like Figures 1-8 As shown, after the liquid crystal molecules are deposited onto the color filter substrate, the first conveyor belt 1 transports the color filter substrate to the designated position. Simultaneously, the array substrate is transported to the designated position by the second conveyor belt 2. The first pneumatic telescopic rod 405 drives the lifting bar 403 upward. The lifting bar 403 rises from the gap between the transmission rods of the second conveyor belt 2, thereby raising the array substrate. Then, the second flipping motor 402 drives the flipping rod 404 to rotate 65°. The flipping rod 404 rotates from the space reserved at the ends of the two lifting bars 403 to below the array substrate. At this time, the flipping rod 404 and the array substrate are aligned. The edges form an angle, and the center of gravity of the array substrate is located on the flip rod 404. Under air pressure control, the suction cup on the flip rod 404 adheres to the array substrate. Then, the output of the first flip motor 401 drives the second flip motor 402 to rotate 180°, ultimately causing the flip rod 404 and the array substrate to rotate horizontally by 180°, so that the array substrate is directly above the color filter substrate. Then, under air pressure control, the suction cup on the flip rod 404 detaches from the array substrate, and the outputs of the first flip motor 401 and the second flip motor 402 return to their initial positions, facilitating continued production.

[0030] Preferably, the first plate 501 serves as the rear plate of the vacuum box, and the second plate 502, which moves up and down, is in a U-shaped structure. The second plate 502 serves as the side plates and bottom plate of the vacuum box. The lower end of the first conveyor belt 1 is provided with a second pneumatic telescopic rod 509, and the upper output end of the second pneumatic telescopic rod 509 is connected to the lower surface of the second plate 502. The two side plates of the second plate 502 slide up and down between the gaps of the conveyor rods. The third plate 503 is bent at 90° and serves as the top plate and front plate of the vacuum box. A slide rail is provided on a transverse frame of the first conveyor belt 1, and the lower end of the front plate of the third plate 503 slides laterally on the slide rail. A third pneumatic telescopic rod 510 is provided on a transverse frame of the first conveyor belt 1, and the output end of the third pneumatic telescopic rod 510 is connected to the side wall of the third plate 503.

[0031] like Figures 1-8 As shown, in this invention, after the array substrate is placed on the color filter substrate, the second pneumatic telescopic rod 509 drives the second plate 502 to slide vertically upward to the top, while the third pneumatic telescopic rod 510 drives the third plate 503 to slide laterally, so that the second plate 502, the third plate 503 and the first plate 501 constitute the body of the vacuum box. Preferably, a vacuum tube 506 is connected through the side of the first plate 501, and a molecular pump assembly is connected to the vacuum tube 506. Rubber strips are provided on the edges of the first plate 501, the second plate 502 and the third plate 503. The rubber strips are hollow and can be filled with or released with air. A positioning block 507 is provided at the top corner of the inner wall of the bottom plate of the second plate 502.

[0032] Air is injected into the rubber strip, sealing the gap between the contact surfaces of the second plate 502, the third plate 503, and the first plate 501. Then, air is drawn from the vacuum tube 506 via a molecular pump assembly, forming a vacuum box with the second plate 502, the third plate 503, and the first plate 501. The rubber strip ensures the sealing effect of the vacuum box. After vacuuming, the lower end of the electric telescopic rod 504 drives the pressing strip 505 vertically downwards, pressing the array substrate downwards. This completes the vacuum bonding of the array substrate and the color filter substrate. After vacuum bonding, the second plate 502 and the third plate 503 return to their initial positions, and the first conveyor belt 1 continues to transport the bonded array substrate and color filter substrate forward for subsequent production steps.

[0033] like Figures 1-8 As shown, the innovative three-plate vacuum chamber design of this invention has a compact structure, ingenious opening and closing and transmission coordination, good sealing performance, and high vacuuming efficiency. It can effectively and thoroughly eliminate air bubbles and ensure the quality of the liquid crystal cell. By setting the vacuum cell on the first conveyor belt 1, the assembly of the vacuum cell integrates multiple functions such as dripping, quality inspection, flipping, and vacuum pressing, realizing full-process automation, greatly reducing manual intervention and turnaround time, improving production efficiency, and reducing the risk of pollution and damage.

[0034] Preferably, the first conveyor belt 1 is provided with a quality inspection component 6, which includes a door frame 601 disposed between the dripping device 3 and the vacuum pressing device 5, and a second CCD industrial camera 602 is mounted on the door frame 601.

[0035] Preferably, the top plate of the third plate 503 is also provided with a third CCD industrial camera 508, and the transverse frame of the second conveyor belt 2 is provided with a fourth CCD industrial camera 603.

[0036] Preferably, the control system includes a detection module, a processing module, and a drive module; like Figures 1-8 As shown, in the detection module, the first CCD industrial camera 304 is used to detect the position of the color filter substrate based on machine vision, the second CCD industrial camera 602 is used to detect whether the liquid crystal dispensing of the color filter substrate is qualified based on machine vision, the third CCD industrial camera 508 is used to detect the position of the color filter substrate in the vacuum box based on machine vision, and the fourth CCD industrial camera 603 is used to detect whether the coating of the array substrate with the sealing glue is qualified and the position of the array substrate. The processing module processes the data provided by the detection module and controls the operation of the first conveyor belt 1, the second conveyor belt 2, the dripping device 3, the flipping assembly 4, and the vacuum pressing device 5 through the drive module.

[0037] In this invention, a multi-CCD vision system performs multiple detections and feedback compensations throughout the entire process. Combined with a high-precision conveyor belt, it ensures seamless and precise alignment from dispensing to pressing, greatly improving product yield. The control system achieves closed-loop control based on machine vision, and has online quality judgment, data traceability and flexible production capabilities, which meet the standards of intelligent manufacturing.

[0038] like Figures 1-8 As shown, the working principle of this invention is as follows: the first conveyor belt 1 is used for point-to-point transport of the color filter substrate, the dispensing device 3 is used for dispensing liquid crystal molecules onto the color filter substrate, the second conveyor belt 2 is used for transporting the array substrate coated with sealant, and when the array substrate is transported to a designated position, the flipping component 4 is used to flip the array substrate 180° so that it is aligned with the color filter substrate transported to the vacuum pressing device 5. First conveyor belt 1 and second conveyor belt 2: arranged side by side. First conveyor belt 1 is used for point-to-point transport of the color filter substrate; second conveyor belt 2 is used for transporting the array substrate that has been coated with sealant. Both conveyor belts adopt a high-precision synchronous transmission structure, which includes transverse frame bars, several transmission rods driven by a sprocket and chain system, and friction rubber blocks set on the transmission rods to ensure that the substrate is transported without slippage and with accurate positioning. The color filter substrate and the array substrate are precisely transported to their respective workstations by the first conveyor belt 1 and the second conveyor belt 2, respectively; liquid crystal dispensing: the first conveyor belt 1 transports the color filter substrate to the dispensing device 3. The first CCD industrial camera 304 identifies the substrate reference mark, and the three-axis moving platform 301 drives the piezoelectric ceramic nozzle 302 to move precisely, dispensing liquid crystal according to the preset pattern.

[0039] A piezoelectric ceramic nozzle 302 is provided for precision jetting of liquid crystal; an ultrasonic atomizer 303 is provided to control the local environment and prevent liquid crystal evaporation.

[0040] Liquid crystal dispensing quality inspection: The color filter substrate that has completed dispensing continues to move forward and passes through the quality inspection gate 601, where it is photographed by the second CCD industrial camera 602 to analyze the liquid crystal dispensing volume, uniformity, and whether the pattern is correct.

[0041] After the liquid crystal molecules are deposited onto the color filter substrate, the first conveyor belt 1 transports the color filter substrate to the designated position. Simultaneously, the array substrate is transported to the designated position by the second conveyor belt 2. The first pneumatic telescopic rod 405 drives the lifting bar 403 upward. The lifting bar 403 rises from the gap between the conveyor bars of the second conveyor belt 2, thereby raising the array substrate. Then, the second flipping motor 402 drives the flipping rod 404 to rotate 65°. The flipping rod 404 rotates from the space reserved at the ends of the two lifting bars 403 to below the array substrate. At this time, the flipping rod 404 is aligned with the edge of the array substrate. An angle is formed, and the center of gravity of the array substrate is located on the flip rod 404. Under air pressure control, the suction cup on the flip rod 404 adheres to the array substrate. Then, the output end of the first flip motor 401 drives the second flip motor 402 to rotate 180°, which ultimately drives the flip rod 404 and the array substrate to rotate horizontally by 180°, so that the array substrate is directly above the color filter substrate. Then, under air pressure control, the suction cup on the flip rod 404 detaches from the array substrate, and the output ends of the first flip motor 401 and the second flip motor 402 return to their initial positions, which facilitates continued production. After the array substrate is placed on the color filter substrate, the second pneumatic telescopic rod 509 drives the second plate 502 to slide vertically upward to the top, while the third pneumatic telescopic rod 510 drives the third plate 503 to slide horizontally, so that the second plate 502, the third plate 503 and the first plate 501 form the body of the vacuum box.

[0042] Air is injected into the rubber strip, sealing the gap between the contact surfaces of the second plate 502, the third plate 503, and the first plate 501. Then, air is drawn from the vacuum tube 506 via a molecular pump assembly, forming a vacuum box with the second plate 502, the third plate 503, and the first plate 501. The rubber strip ensures the sealing effect of the vacuum box. After vacuuming, the lower end of the electric telescopic rod 504 drives the pressing strip 505 vertically downwards, pressing the array substrate downwards. This completes the vacuum bonding of the array substrate and the color filter substrate. After vacuum bonding, the second plate 502 and the third plate 503 return to their initial positions, and the first conveyor belt 1 continues to transport the bonded array substrate and color filter substrate forward for subsequent production steps.

[0043] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A high-precision liquid crystal dispensing and vacuum pressing device, characterized in that: The system includes a processing device and a control system for controlling the processing device. The processing device includes a first conveyor belt (1) and a second conveyor belt (2), which are arranged side by side. The first conveyor belt (1) is used for point-to-point transmission of the color filter substrate. The second conveyor belt (2) is used for transmission of the array substrate that has been coated with sealant. Both the first conveyor belt (1) and the second conveyor belt (2) include a transverse frame bar. The transverse frame bar is movably provided with equally spaced array transmission rods. The first conveyor belt (1) is provided with a dripping device (3). A flipping component (4) is provided between the first conveyor belt (1) and the second conveyor belt (2). The first conveyor belt (1) is provided with a vacuum pressing device (5). The flipping component (4) is used to flip the array substrate 180° so that it is aligned and bonded with the color filter substrate on the first conveyor belt (1). The vacuum pressing device (5) includes a first plate (501) fixedly mounted on the side rail of the first conveyor belt (1), a second plate (502) that moves up and down, and a third plate (503) that slides laterally. The first plate (501), the second plate (502), and the third plate (503) form a sealed vacuum box. The lower surface of the inner wall of the upper plate of the third plate (503) is provided with an electric telescopic rod (504), and the lower end of the electric telescopic rod (504) is provided with a pressing strip (505). The first plate (501) serves as the rear plate of the vacuum box. The second plate (502), which moves up and down, is in a U-shaped structure. The second plate (502) serves as the side plates and bottom plate of the vacuum box. The lower end of the first conveyor belt (1) is provided with a second pneumatic telescopic rod (509). The upper output end of the second pneumatic telescopic rod (509) is connected to the lower surface of the second plate (502). The two side plates of the second plate (502) slide up and down between the gaps of the conveyor rod. The third plate (503) is bent at 90°. The third plate (503) serves as the top plate and front plate of the vacuum box. A slide rail is provided on a transverse frame of the first conveyor belt (1). The lower end of the front plate of the third plate (503) slides laterally on the slide rail. A third pneumatic telescopic rod (510) is provided on a transverse frame of the first conveyor belt (1). The output end of the third pneumatic telescopic rod (510) is connected to the side wall of the third plate (503). A vacuum tube (506) is connected through the side of the first plate (501), and a molecular pump assembly is connected to the vacuum tube (506). Rubber strips are provided on the edges of the first plate (501), the second plate (502) and the third plate (503). The rubber strips are hollow and can be filled with or released with air. A positioning block (507) is provided at the top corner of the inner wall of the bottom plate of the second plate (502). After the array substrate is placed on the color filter substrate, the second pneumatic telescopic rod (509) drives the second plate (502) to slide vertically upward to the top, while the third pneumatic telescopic rod (510) drives the third plate (503) to slide horizontally, so that the second plate (502), the third plate (503) and the first plate (501) form the body of the vacuum box.

2. The high-precision liquid crystal dispensing and vacuum pressing device according to claim 1, characterized in that: The first transmission belt (1) and the second transmission belt (2) are arranged side by side. The transmission rod is provided with friction rubber blocks distributed in an equally spaced array. The transverse frame is provided with transmission chains and sprockets distributed in an alternating manner. The sprockets cooperate with the chains to drive the transmission rod to rotate at the same speed.

3. The high-precision liquid crystal dispensing and vacuum pressing device according to claim 2, characterized in that: The dripping device (3) includes a three-axis moving platform (301) set on the transverse frame of the first conveyor belt (1), and the three-axis moving platform (301) is provided with an integrated piezoelectric ceramic nozzle (302), an ultrasonic atomizer (303) and a first CCD industrial camera (304).

4. The high-precision liquid crystal dispensing and vacuum pressing device according to claim 2, characterized in that: The flipping assembly (4) includes a first flipping motor (401) disposed on the horizontal frame. The first flipping motor (401) is placed horizontally, and a second flipping motor (402) is installed at the output end of the first flipping motor (401). The second flipping motor (402) is set vertically, and a flipping rod (404) is provided at the output end of the second flipping motor (402). An electric suction cup is installed on the flipping rod (404).

5. The high-precision liquid crystal dispensing and vacuum pressing device according to claim 4, characterized in that: The flipping assembly (4) further includes a first pneumatic telescopic rod (405) disposed at the lower end of the transverse frame of the second conveyor belt (2), and a lifting bar (403) is provided at the upper output end of the first pneumatic telescopic rod (405), and the lifting bar (403) is located between the gaps of the transmission rods of the second conveyor belt (2).

6. The high-precision liquid crystal dispensing and vacuum pressing device according to claim 3, characterized in that: The first conveyor belt (1) is provided with a quality inspection component (6), the quality inspection component (6) includes a door frame (601) disposed between the dripping device (3) and the vacuum pressing device (5), and a second CCD industrial camera (602) is installed on the door frame (601).

7. The high-precision liquid crystal dispensing and vacuum pressing device according to claim 6, characterized in that: The top plate of the third plate (503) is also provided with a third CCD industrial camera (508), and the transverse frame of the second conveyor belt (2) is provided with a fourth CCD industrial camera (603).

8. The high-precision liquid crystal dispensing and vacuum pressing device according to claim 7, characterized in that: The control system includes a detection module, a processing module, and a drive module; In the detection module, the first CCD industrial camera (304) is used to detect the position of the color filter substrate based on machine vision, the second CCD industrial camera (602) is used to detect whether the liquid crystal dispensing of the color filter substrate is qualified based on machine vision, the third CCD industrial camera (508) is used to detect the position of the color filter substrate in the vacuum box based on machine vision, and the fourth CCD industrial camera (603) is used to detect whether the coating of the array substrate with the sealing glue is qualified and the position of the array substrate. The processing module processes the data provided by the detection module and controls the operation of the first conveyor belt (1), the second conveyor belt (2), the dripping device (3), the flipping component (4), and the vacuum pressing device (5) through the drive module.

Images