Liquid crystal filling device and method for LCD manufacturing

Abstract

The invention relates to the technical field of liquid crystal filling, in particular to a liquid crystal filling device and method for LCD manufacturing, the liquid crystal filling device comprises a base, a feeding seat, a first conveying belt, a discharging seat and a second conveying belt, the feeding seat is arranged on the base, a controller is arranged on the base, the first conveying belt is movably arranged on the feeding seat, and the discharging seat is arranged on the second conveying belt. The discharging seat is movably arranged on the base, the second conveying belt is movably arranged on the discharging seat, the filling device further comprises an electric guide rail, a moving seat, a filling box body and an empty box mounting assembly, the electric guide rail is arranged on the base, the moving seat is movably arranged on the electric guide rail and connected with the discharging seat, and the empty box mounting assembly is arranged on the moving seat. The empty box installation assembly is arranged on the base, and the material injection box body is arranged on the base. The whole device is high in automation degree, on the premise that a vacuumizing liquid crystal filling method is achieved, the filling period of the whole liquid crystal empty box is shortened, and the input amount of labor force is reduced.

Description

Technical Field

[0001] The present invention relates to the field of liquid crystal injection technology, and more specifically, to a liquid crystal injection device and method for LCD manufacturing. Background Art

[0002] A conventional LCD liquid crystal display panel generally includes a color filter substrate, a liquid crystal layer, and a thin film transistor array substrate. The color filter substrate and the thin film transistor array substrate are stacked and combined into one, and the liquid crystal layer is arranged between the color filter substrate and the thin film transistor array substrate.

[0003] In the production and processing of LCD liquid crystal display screens, liquid crystal needs to be poured into the empty liquid crystal box. Vacuum pouring is one of the common ways of liquid crystal pouring. The existing vacuum liquid crystal pouring device has a simple structure and requires manual control of the input and output of the empty liquid crystal box, the vacuum pumping of the empty liquid crystal box, and the opening of the pouring valve of the empty liquid crystal box, which is very inconvenient and leads to a long entire pouring cycle. Summary of the invention

[0004] The object of the present invention is to provide a liquid crystal injection device for LCD manufacturing to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A liquid crystal filling device for LCD manufacturing comprises a base, a feed seat, a first conveyor belt, a discharge seat and a second conveyor belt, wherein the feed seat is arranged on the base, a controller is arranged on the base, the first conveyor belt is movably arranged on the feed seat, the discharge seat is movably arranged on the base, and the second conveyor belt is movably arranged on the discharge seat. The filling device also comprises an electric guide rail, a movable seat, a filling box, and an empty box installation assembly, wherein the electric guide rail is arranged on the base, the movable seat is movably arranged on the electric guide rail and connected to the discharge seat, the empty box installation assembly is arranged on the base, and is used to receive the empty liquid crystal boxes transported by the first conveyor belt and input the filled empty liquid crystal boxes to the second conveyor belt, and the filling box is arranged on the base, and is used to input liquid crystal into the empty liquid crystal boxes.

[0006] A further technical solution of the present application: the empty box installation assembly includes an installation box, an electric telescopic rod, a gear, a rack, a sealing module and a limit module; a support frame is provided on the base; the installation box is movably arranged on the support frame and is located on one side of the injection box; a unloading window matching the injection box is provided on the installation box; a one-way valve is provided in the unloading window; the gear is movably arranged on the support frame and connected to the installation box; an installation groove matching the liquid crystal empty box is formed in the installation box; the sealing module is arranged on the installation box for controlling the opening and closing of the unloading window and vacuuming the liquid crystal empty box; the limit module is arranged on the installation box for limiting the liquid crystal empty box in the installation groove.

[0007] A further technical solution of the present application: the sealing module includes a sealing structure and an exhaust structure, the sealing structure is arranged on the installation box, and is used to control the opening and closing of the unloading window, the exhaust structure is arranged on the installation box and is connected to the installation groove, the exhaust structure is connected to the sealing structure, and when the sealing structure is working, it controls the exhaust structure to work synchronously and exhaust the air in the liquid crystal empty box.

[0008] A further technical solution of the present application: the sealing structure includes a contact plate, a push arm, a slider and a sealing plate, the contact plate is movably arranged on the inner side of the installation box, the slider is movably arranged on the outer side of the installation box through a guide rod, the contact plate and the slider are both provided with magnetic blocks that meet and attract each other, the sealing plate slides through the installation box, the sealing plate is provided with a matching window matching the blanking window, the blanking window is located on the moving path of the matching window, one end of the sealing plate is movably connected with the push arm and the slider, the other end of the sealing plate is connected to the exhaust structure, the sealing plate is provided with an exhaust groove connected to the installation groove, the installation box is provided with a connecting hole connected to the exhaust groove, and the connecting hole is connected to the exhaust structure.

[0009] The present application has a further technical solution: the exhaust structure includes a push plate, a pipe rack, a piston rod and an exhaust pipe. The exhaust pipes are multiple in number and are arranged on the mounting box through the pipe rack. The push plate is movably arranged in a guide groove formed on the mounting box. The push plate is connected to a sealing plate. A piston rod is movably arranged in each of the exhaust pipes. One end of the piston rod away from the exhaust pipe is connected to the push plate. The exhaust pipe is provided with an exhaust hole, which is connected to the connecting hole.

[0010] The present application has a further technical solution: the limit module includes a limit structure and a monitoring structure, the monitoring structure is arranged on the support frame and connected to the installation box, and is used to monitor the rotation angle of the installation box, the limit structure is arranged on the side of the installation box away from the blanking window, and is used to limit the moving direction of the empty liquid crystal box in the installation groove, the limit structure and the monitoring structure are electrically connected, and the monitoring structure monitors that the rotation angle of the installation box reaches a set angle and controls the limit structure to fail.

[0011] The present application has a further technical solution: the limiting structure includes a hinge block, a limiting plate and an electromagnet, the hinge block is movably arranged in a slide rail formed on the installation box and the two are elastically connected, an iron block is arranged in the hinge block, the electromagnet is arranged on the installation box and is located on one side of the hinge block, the electromagnet is electrically connected to the monitoring structure, one end of the limiting plate is hinged on the hinge block, and a storage groove is formed on the installation box to cooperate with the sliding of the limiting plate.

[0012] A further technical solution of the present application is as follows: the monitoring structure includes a monitoring box, a conductive block and a conductive disk, the monitoring box is arranged on a support frame, the conductive disk is movably arranged in the monitoring box and connected to the mounting box, the conductive block is arranged on the inner wall of the monitoring box and is located on the moving path of the conductive disk, and the conductive disk, the conductive block and the electromagnet are electrically connected.

[0013] A further technical solution of the present application is as follows: the injection box body includes a liquid storage box, a matching joint, an air pump, a sealing box and an extrusion plate, the liquid storage box is arranged on a base, the matching joint is movably arranged at the discharge port of the liquid storage box and cooperates with the unloading window, the matching joint and the liquid storage box are elastically connected, the extrusion plate is movably arranged in an extrusion recess formed on the liquid storage box, the extrusion plate and the liquid storage box are elastically connected, the sealing box is arranged on the base, the extrusion recess is arranged on the inner side of the sealing box, and the air pump is arranged on the sealing box.

[0014] A liquid crystal injection method for LCD manufacturing is applied to the liquid crystal injection device described in the above technical solution. The specific steps of the liquid crystal injection method are as follows: S100: placing an empty liquid crystal box on a feed seat, and controlling the first conveyor belt to move the empty liquid crystal box toward an empty box installation assembly through a controller; S200: receiving an empty liquid crystal box through an empty box installation component, wherein the empty box installation component can evacuate the interior of the empty liquid crystal box when in operation, and can control the operation of the injection box to inject liquid crystal into the empty liquid crystal box; S300: Finally, the empty box installation assembly is controlled to input the filled empty liquid crystal boxes into the discharge seat, and the empty liquid crystal boxes are discharged through the second conveyor belt.

[0015] Compared with the prior art, the technical solution provided by the embodiment of the present invention has the following beneficial effects: The embodiment of the present invention sets up an empty box installation component, and utilizes the linkage structure between the sealing structure and the exhaust structure. When the installation box enters the installation groove, the sealing structure can be controlled to work. On the one hand, the sealing structure can control the connection between the unloading window and the matching window, so that the installation groove and the filling box are connected and connected. On the other hand, the exhaust structure can be controlled to work to extract the air in the liquid crystal empty box. At the same time, the installation box is rotated and connected to the feed seat and the discharge seat respectively by utilizing the extension and contraction of the electric telescopic rod, so as to realize automatic input and discharge of the installation box. The whole device has a high degree of automation. Under the premise of realizing the vacuum liquid crystal infusion method, the infusion cycle of the entire liquid crystal empty box is shortened and the labor input is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a liquid crystal injection device for LCD manufacturing according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the partial structure of a material injection box in a liquid crystal injection device for LCD manufacturing according to an embodiment of the present invention; Figure 3 It is a structural schematic diagram of a hollow box installation assembly of a liquid crystal filling device for LCD manufacturing according to an embodiment of the present invention; Figure 4 A partial cross-sectional view of a mounting box in a liquid crystal injection device for LCD manufacturing according to an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a sealing structure in a liquid crystal filling device for LCD manufacturing according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of the monitoring structure in the liquid crystal filling device for LCD manufacturing according to an embodiment of the present invention; Figure 7 It is a schematic structural diagram of a limiting structure in a liquid crystal filling device for LCD manufacturing according to an embodiment of the present invention; Figure 8 Schematic diagram of the structure of the exhaust structure in the liquid crystal filling device for LCD manufacturing in an embodiment of the present invention.

[0017] Explanation of the symbols in the schematic diagram: 1-sealed box, 2-controller, 3-base, 4-feeding seat, 5-first conveyor belt, 6-electric guide rail, 7-moving seat, 8-discharging seat, 9-second conveyor belt, 10-air pump, 11-liquid storage box, 12-matching joint, 13-electric telescopic rod, 14-rack, 15-gear, 16-installation box, 17-support frame, 18-exhaust pipe, 19-pipe rack, 20-piston rod, 21-exhaust hole, 22-push plate , 23-guide groove, 24-connecting hole, 25-contact plate, 26-installation groove, 27-guide rod, 28-slider, 29-magnetic block, 30-push arm, 31-sealing plate, 32-matching window, 33-exhaust groove, 34-unloading window, 35-monitoring box, 36-conductive disk, 37-conductive block, 38-slide rail, 39-storage tank, 40-hinge block, 41-limiting plate, 42-electromagnet, 43-extrusion plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention is further described below in combination with the embodiments.

[0019] See also Figure 1-Figure 8 In one embodiment of the present application, a liquid crystal perfusion device for LCD manufacturing includes a base 3, a feed seat 4, a first conveyor belt 5, a discharge seat 8 and a second conveyor belt 9, wherein the feed seat 4 is arranged on the base 3, and a controller 2 is arranged on the base 3, the first conveyor belt 5 is movably arranged on the feed seat 4, the discharge seat 8 is movably arranged on the base 3, and the second conveyor belt 9 is movably arranged on the discharge seat 8. The perfusion device also includes an electric guide rail 6, a movable seat 7, a filling box, and an empty box installation assembly, wherein the electric guide rail 6 is arranged on the base 3, the movable seat 7 is movably arranged on the electric guide rail 6 and connected to the discharge seat 8, the empty box installation assembly is arranged on the base 3, and is used to receive the empty liquid crystal boxes transported by the first conveyor belt 5 and input the filled empty liquid crystal boxes to the second conveyor belt 9, and the filling box is arranged on the base 3, and is used to input liquid crystal into the empty liquid crystal boxes.

[0020] In the present embodiment, the empty box installation assembly includes an installation box 16, an electric telescopic rod 13, a gear 15, a rack 14, a sealing module and a limit module. A support frame 17 is provided on the base 3. The installation box 16 is movably arranged on the support frame 17 and is located on one side of the injection box. A feeding window 34 matching the injection box is provided on the installation box 16. A one-way valve is provided in the feeding window 34. The gear 15 is movably arranged on the support frame 17 and connected to the installation box 16. A mounting groove 26 matching the liquid crystal empty box is formed in the installation box 16. The sealing module is arranged on the installation box 16 for controlling the opening and closing of the feeding window 34 and vacuuming the liquid crystal empty box. The limit module is arranged on the installation box 16 for limiting the liquid crystal empty box in the mounting groove 26.

[0021] In actual application, the empty liquid crystal box is placed on the feed seat 4, and the controller 2 controls the first conveyor belt 5 to control the empty liquid crystal box to move toward the direction of the empty box installation assembly; the empty liquid crystal box is received by the empty box installation assembly, and in this process, the sealing module can be controlled to work and evacuate the inside of the empty liquid crystal box, and at the same time, the empty liquid crystal box in the installation groove 26 is limited by the limiting mold hole, and the injection box can be controlled to inject the liquid crystal into the empty liquid crystal box; finally, the electric telescopic rod 13 is controlled to extend by the controller 2, thereby driving the rack 14 to move, and under the meshing action between the rack 14 and the gear 15, the installation box 16 is driven to rotate, so that the installation box 16 is separated from the feed seat 4 and docked with the discharge seat 8, and the limiting module automatically fails at this time, so that the filled empty liquid crystal box is discharged into the discharge seat 8, and the empty liquid crystal box is discharged by the second conveyor belt 9, completing the liquid crystal injection work of the entire liquid crystal empty box.

[0022] See also Figure 1-Figure 8 As another preferred embodiment of the present application, the sealing module includes a sealing structure and an exhaust structure. The sealing structure is arranged on the installation box 16 and is used to control the opening and closing of the unloading window 34. The exhaust structure is arranged on the installation box 16 and is connected to the installation groove 26. The exhaust structure is connected to the sealing structure. When the sealing structure works, it controls the exhaust structure to work synchronously and exhaust the air in the liquid crystal empty box.

[0023] In a specific case of the present embodiment, the sealing structure includes a contact plate 25, a push arm 30, a slider 28 and a sealing plate 31. The contact plate 25 is movably arranged on the inner side of the installation box 16, and the slider 28 is movably arranged on the outer side of the installation box 16 through a guide rod 27. Both the contact plate 25 and the slider 28 are provided with magnetic blocks 29 that meet and attract each other. The sealing plate 31 slides through the installation box 16. The sealing plate 31 is provided with a matching window 32 that matches the blanking window 34. The blanking window 34 is located on the moving path of the matching window 32. One end of the sealing plate 31 is movably connected with the slider 28 through the push arm 30, and the other end of the sealing plate 31 is connected to the exhaust structure. The sealing plate 31 is provided with an exhaust groove 33 that is connected to the installation groove 26. The installation box 16 is provided with a connecting hole 24 that is connected to the exhaust groove 33, and the connecting hole 24 is connected to the exhaust structure.

[0024] In another specific case of the present embodiment, the exhaust structure includes a push plate 22, a pipe rack 19, a piston rod 20 and an exhaust pipe 18. The exhaust pipes 18 are in multiple numbers and are arranged on the mounting box 16 through the pipe rack 19. The push plate 22 is movably arranged in a guide groove 23 formed on the mounting box 16. The push plate 22 is connected to a sealing plate 31. A piston rod 20 is movably arranged in each of the exhaust pipes 18. One end of the piston rod 20 away from the exhaust pipe 18 is connected to the push plate 22. An exhaust hole 21 is arranged on the exhaust pipe 18, and the exhaust hole 21 is connected to the connecting hole 24.

[0025] It should be noted that the present embodiment is not limited to the above-mentioned magnetic block 29 to control the synchronous movement of the contact plate 25 and the slider 28, and an electromagnet or a permanent magnet may be used instead, which are not listed here one by one.

[0026] When the first conveyor belt 5 places the empty liquid crystal box in the mounting groove 26, the empty liquid crystal box moves along the mounting groove 26 and meets and collides with the resistance plate 25, thereby driving the resistance plate 25 to move along the mounting groove 26. Under the action of the magnet, the slider 28 can be driven to move synchronously. Under the action of the push arm 30, the sealing plate 31 can be driven to move relative to the mounting box 16. In this process, the piston rod 20 can be driven to move synchronously. During the movement of the piston rod 20, the air in the mounting groove 26 and the empty liquid crystal box can be drawn into the exhaust pipe 18 along the exhaust groove 33 and the connecting hole 24, thereby realizing the vacuuming of the empty liquid crystal box, until the matching window 32 and the blanking window 34 meet and connect, and then the filling box is controlled to discharge the liquid crystal into the empty liquid crystal box along the blanking window 34, thereby completing the filling of the empty liquid crystal box.

[0027] See also Figure 1-Figure 8As another preferred embodiment of the present application, the limit module includes a limit structure and a monitoring structure. The monitoring structure is arranged on the support frame 17 and connected to the installation box 16, and is used to monitor the rotation angle of the installation box 16. The limit structure is arranged on the side of the installation box 16 away from the blanking window 34, and is used to limit the moving direction of the empty liquid crystal box in the installation groove 26. The limit structure and the monitoring structure are electrically connected. When the monitoring structure monitors that the rotation angle of the installation box 16 reaches a set angle, the limit structure is controlled to fail.

[0028] In a specific case of the present embodiment, the limiting structure includes a hinge block 40, a limiting plate 41 and an electromagnet 42. The hinge block 40 is movably arranged in a slide rail 38 formed on the installation box 16 and the two are elastically connected. An iron block is arranged in the hinge block 40. The electromagnet 42 is arranged on the installation box 16 and is located on one side of the hinge block 40. The electromagnet 42 is electrically connected to the monitoring structure. One end of the limiting plate 41 is hinged on the hinge block 40. A storage groove 39 is formed on the installation box 16 and slides with the limiting plate 41.

[0029] In another specific case of this embodiment, the monitoring structure includes a monitoring box 35, a conductive block 37 and a conductive disk 36. The monitoring box 35 is set on the support frame 17. The conductive disk 36 is movably set in the monitoring box 35 and connected to the installation box 16. The conductive block 37 is set on the inner wall of the monitoring box 35 and is located on the moving path of the conductive disk 36. The conductive disk 36, the conductive block 37 and the electromagnet 42 are electrically connected.

[0030] It should be supplemented that the injection box body includes a liquid storage box 11, a matching joint 12, an air pump 10, a sealing box 1 and an extrusion plate 43. The liquid storage box 11 is arranged on the base 3. The matching joint 12 is movably arranged at the discharge port of the liquid storage box 11 and cooperates with the unloading window 34. The matching joint 12 and the liquid storage box 11 are elastically connected. The extrusion plate 43 is movably arranged in an extrusion recess formed on the liquid storage box 11. The extrusion plate 43 and the liquid storage box 11 are elastically connected. The sealing box 1 is arranged on the base 3. The extrusion recess is arranged on the inner side of the sealing box 1. The air pump 10 is arranged on the sealing box 1.

[0031] It should be noted that this embodiment is not limited to the above-mentioned monitoring structure to monitor the rotation angle of the installation box 16. Infrared ranging sensors or laser ranging sensors can also be used to monitor the movement distance of the rack 14 to determine the rotation angle of the installation box 16, which are not listed one by one in this embodiment.

[0032] When the empty liquid crystal box is placed in the installation groove 26, the empty liquid crystal box squeezes the limiting plate 41, so that the limiting plate 41 enters the storage groove 39, and the empty liquid crystal box moves from one side of the limiting plate 41 to the other side. In this process, the limiting plate 41 limits the empty liquid crystal box. After the vacuuming of the empty liquid crystal box is completed, the air pump 10 is controlled to input air into the sealing box 1. Under the action of air pressure, the squeezing plate 43 can be controlled to move along the squeezing notch and input the liquid crystal into the empty liquid crystal box along the matching joint 12 for filling. After completing the filling of the empty liquid crystal boxes, the installation box 16 is rotated 180° by controlling the electric telescopic rod 13. In this process, the conductive disk 36 can be driven to rotate relative to the monitoring box 35, so that the conductive disk 36 and the conductive block 37 meet and control the electromagnet 42 to energize to attract the iron block, thereby controlling the hinge block 40 to move along the slide rail 38 and allowing the limit plate 41 to disengage from the limiting work of the empty liquid crystal box. At this time, the empty liquid crystal box can fall into the discharge seat 8 under the action of its gravity and finally be discharged along the second conveyor belt 9.

[0033] See also Figure 1-Figure 8 In another embodiment of the present application, a liquid crystal perfusion method for LCD manufacturing is applied to the liquid crystal perfusion device described in the above embodiment, and the specific steps of the liquid crystal perfusion method are as follows: S100: placing an empty liquid crystal box on the feed seat 4, and controlling the first conveyor belt 5 through the controller 2 to control the empty liquid crystal box to move toward the direction of the empty box installation assembly; S200: receiving an empty liquid crystal box through an empty box installation component, wherein the empty box installation component can evacuate the interior of the empty liquid crystal box when in operation, and can control the operation of the injection box to inject liquid crystal into the empty liquid crystal box; S300: Finally, the empty box installation assembly is controlled to input the filled empty liquid crystal boxes into the discharge seat 8, and the second conveyor belt 9 is operated to discharge the empty liquid crystal boxes.

[0034] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention. In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A liquid crystal perfusion device for LCD manufacturing, comprising a base, a feed seat, a first conveyor belt, a discharge seat and a second conveyor belt, wherein the feed seat is arranged on the base, a controller is arranged on the base, the first conveyor belt is movably arranged on the feed seat, the discharge seat is movably arranged on the base, and the second conveyor belt is movably arranged on the discharge seat, characterized in that: The filling device also includes an electric guide rail, a movable seat, a filling box, and an empty box installation assembly. The electric guide rail is arranged on the base, and the movable seat is movably arranged on the electric guide rail and connected to the discharge seat. The empty box installation assembly is arranged on the base, and is used to receive the empty liquid crystal boxes conveyed by the first conveyor belt and input the filled empty liquid crystal boxes to the second conveyor belt. The filling box is arranged on the base, and is used to input liquid crystal into the empty liquid crystal boxes.

2. The liquid crystal filling device for LCD manufacturing according to claim 1, characterized in that: The empty box installation assembly includes an installation box, an electric telescopic rod, a gear, a rack, a sealing module and a limit module. A support frame is arranged on the base, and the installation box is movably arranged on the support frame and is located on one side of the injection box. A feeding window matching the injection box is arranged on the installation box, and a one-way valve is arranged in the feeding window. The gear is movably arranged on the support frame and connected to the installation box. An installation groove matching the liquid crystal empty box is formed in the installation box. The sealing module is arranged on the installation box for controlling the opening and closing of the feeding window and vacuuming the liquid crystal empty box. The limit module is arranged on the installation box for limiting the liquid crystal empty box in the installation groove.

3. The liquid crystal filling device for LCD manufacturing according to claim 2, characterized in that: The sealing module includes a sealing structure and an exhaust structure. The sealing structure is arranged on the installation box and is used to control the opening and closing of the unloading window. The exhaust structure is arranged on the installation box and is connected to the installation groove. The exhaust structure is connected to the sealing structure. When the sealing structure works, it controls the exhaust structure to work synchronously and exhaust the air in the liquid crystal empty box.

4. The liquid crystal filling device for LCD manufacturing according to claim 3, characterized in that: The sealing structure includes a contact plate, a push arm, a slider and a sealing plate. The contact plate is movably arranged on the inner side of the installation box, and the slider is movably arranged on the outer side of the installation box through a guide rod. The contact plate and the slider are both provided with magnetic blocks that meet and attract each other. The sealing plate slides through the installation box, and a matching window matching the blanking window is provided on the sealing plate. The blanking window is located on the moving path of the matching window. One end of the sealing plate is movably connected with the push arm and the slider, and the other end of the sealing plate is connected to the exhaust structure. An exhaust groove connected to the installation groove is provided on the sealing plate, and a connecting hole connected to the exhaust groove is provided on the installation box, and the connecting hole is connected to the exhaust structure.

5. The liquid crystal filling device for LCD manufacturing according to claim 4, characterized in that: The exhaust structure includes a push plate, a pipe rack, a piston rod and an exhaust pipe. There are several exhaust pipes and they are arranged on the installation box through the pipe rack. The push plate is movably arranged in a guide groove formed on the installation box. The push plate is connected to a sealing plate. A piston rod is movably arranged in each exhaust pipe. One end of the piston rod away from the exhaust pipe is connected to the push plate. An exhaust hole is arranged on the exhaust pipe, and the exhaust hole is connected to the connecting hole.

6. The liquid crystal filling device for LCD manufacturing according to claim 2, characterized in that: The limit module includes a limit structure and a monitoring structure. The monitoring structure is arranged on the support frame and connected to the installation box, and is used to monitor the rotation angle of the installation box. The limit structure is arranged on the side of the installation box away from the blanking window, and is used to limit the moving direction of the empty liquid crystal box in the installation groove. The limit structure and the monitoring structure are electrically connected. When the monitoring structure monitors that the rotation angle of the installation box reaches a set angle, the limit structure is controlled to fail.

7. The liquid crystal injection device for LCD manufacturing according to claim 6, characterized in that: The limiting structure includes a hinge block, a limiting plate and an electromagnet. The hinge block is movably arranged in a slide rail formed on the installation box and the two are elastically connected. An iron block is arranged in the hinge block. The electromagnet is arranged on the installation box and is located on one side of the hinge block. The electromagnet is electrically connected to the monitoring structure. One end of the limiting plate is hinged on the hinge block. A storage groove is formed on the installation box and cooperates with the sliding of the limiting plate.

8. The liquid crystal injection device for LCD manufacturing according to claim 7, characterized in that: The monitoring structure includes a monitoring box, a conductive block and a conductive disk. The monitoring box is arranged on a support frame. The conductive disk is movably arranged in the monitoring box and connected to the installation box. The conductive block is arranged on the inner wall of the monitoring box and is located on the moving path of the conductive disk. The conductive disk, the conductive block and the electromagnet are electrically connected.

9. The liquid crystal filling device for LCD manufacturing according to claim 8, characterized in that: The injection box body includes a liquid storage box, a matching head, an air pump, a sealing box and an extrusion plate. The liquid storage box is arranged on a base. The matching head is movably arranged at the discharge port of the liquid storage box and cooperates with the unloading window. The matching head is elastically connected to the liquid storage box. The extrusion plate is movably arranged in an extrusion recess formed on the liquid storage box. The extrusion plate is elastically connected to the liquid storage box. The sealing box is arranged on the base. The extrusion recess is arranged on the inner side of the sealing box. The air pump is arranged on the sealing box.

10. A liquid crystal injection method for LCD manufacturing, applied to the liquid crystal injection device according to claim 1, characterized in that: The specific steps of the liquid crystal perfusion method are as follows: S100: placing an empty liquid crystal box on a feed seat, and controlling the first conveyor belt to move the empty liquid crystal box toward an empty box installation assembly through a controller; S200: receiving an empty liquid crystal box through an empty box installation component, wherein the empty box installation component can evacuate the interior of the empty liquid crystal box when in operation, and can control the operation of the injection box to inject liquid crystal into the empty liquid crystal box; S300: Finally, the empty box installation assembly is controlled to input the filled empty liquid crystal boxes into the discharge seat, and the empty liquid crystal boxes are discharged through the second conveyor belt.

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