A display screen glass substrate cleaning machine

Abstract

This application relates to a glass substrate cleaning machine for display screens, used for cleaning glass substrates in display screen manufacturing. It includes a frame, a roller conveyor horizontally mounted on the frame, a rotating platform driven to rotate on the frame, with the rotation axis of the rotating platform parallel to the conveying direction of the roller conveyor, and a clamping assembly mounted on the rotating platform for clamping two opposing small faces of the workpiece. The display screen cleaning machine provided by this invention can clean both sides of the glass substrate. By flipping the substrate, one side is cleaned before the other, allowing for a more thorough cleaning. The inclusion of an air knife device ensures that the dried glass substrate is free of watermarks.

Description

Technical Field

[0001] This application relates to the field of display screen manufacturing and processing, and in particular to a display screen glass substrate cleaning machine. Background Technology

[0002] Glass substrates are a core material in the display manufacturing industry; they are extremely flat and ultra-thin sheets of special glass. During display manufacturing, the cut glass substrates are typically cleaned in a cleaning machine before proceeding to the next step. The purpose of cleaning is to remove particles, dirt, and other contaminants from the surface of the glass substrate.

[0003] There are several cleaning methods. The first is ultrasonic cleaning, which involves immersing the glass substrate in a cleaning tank for ultrasonic cleaning. The advantage is that it can efficiently clean the glass substrate and effectively target stubborn dirt. The disadvantage is that the glass substrate needs to be removed from the cleaning tank after cleaning before it can be sent to the next process, so it is not suitable for use in assembly line production.

[0004] The second method is a conveyor belt for double-sided synchronous cleaning, such as the announcement number CN221493474U, a panel glass cleaning machine. Its advantage is that it can simultaneously rinse, scrape and dry the upper and lower surfaces of the conveying panel glass. However, its disadvantage is that when cleaning the lower surface of the glass substrate, the conveying element needs to have a gap for the cleaning element to be set. The size of the gap depends on the structure of the cleaning element. The change in the gap will affect the size of the glass substrate that can be adapted. Moreover, it is necessary to use a complex structure to adapt to glass substrates of different thicknesses. In addition, the scraping-related elements are usually statically set, making it difficult to remove stubborn dirt from the glass substrate.

[0005] Alternatively, as in announcement number CN218309858U, a surface cleaning device for glass processing works by rotating the cleaning shafts and driving the brushes to clean the upper and lower surfaces of the glass substrate simultaneously when the glass substrate passes between two cleaning shafts. However, the disadvantage is that the brushes are subject to high requirements; they cannot be too soft, which would cause unstable transport of the glass substrate when it passes between the two cleaning shafts, nor can they be too hard, which would scratch the glass substrate. Furthermore, the cleaning shafts can usually only rotate in one direction, resulting in a single cleaning method.

[0006] The third type is a combination of conveyor belt single-sided cleaning and flipping, such as announcement number CN218691798U, a surface cleaning device and surface cleaning equipment for display screen components. The advantage is that it can perform multi-dimensional cleaning on both sides. The disadvantage is that during the flipping process, the suction cup will adhere to the large surface of the glass substrate, so the dirt on the suction cup will adhere to the glass substrate. Or, as in announcement number CN220836925U, an automatic double-sided glass cleaning machine with flipping function, the advantage is that it can be located directly on the conveyor route of the glass substrate. The disadvantage is that the groove is relatively deep, which is not convenient for cleaning, and it will also partially contact the large surface of the glass substrate.

[0007] Therefore, in order to solve the problems in the prior art, this utility model proposes a glass substrate cleaning machine for display screens. Utility Model Content

[0008] The purpose of this utility model embodiment is to provide a display screen glass substrate cleaning machine to solve the problems in the prior art, such as the difficulty of removing stubborn stains from the surface of the glass substrate, the dirt on the cleaned side of the glass substrate when flipping it over, and the watermarks left after drying the glass substrate.

[0009] To solve the above problems, the technical solution of this utility model embodiment is as follows: This utility model provides a display screen glass substrate cleaning machine, including a frame; a roller conveyor horizontally arranged on the frame; a tilting table driven to rotate on the frame, the rotation axis of the tilting table being parallel to the conveying direction of the roller conveyor; and a clamping assembly arranged on the tilting table, the clamping assembly being used to clamp two opposite small faces of the workpiece.

[0010] Furthermore, in a preferred embodiment, two roller conveyors are provided, the two roller conveyors are arranged at the same height, and there is a turning area between the two roller conveyors for the turning table and the clamping assembly to be arranged, the turning area for the part of the workpiece leaving the roller conveyor to enter.

[0011] Furthermore, in a preferred embodiment, the workpiece is arranged in a U-shape along the conveying path of the two roller conveyors.

[0012] Furthermore, in a preferred embodiment, the clamping assembly includes a protective block, a clamping block, and an opening / closing drive. The protective block is disposed on the tilting table, and a protective groove is formed between the inner side of the protective block and the surface of the tilting table. The centerline of the protective groove is not coaxial with the centerline of the tilting table, and the protective groove allows the workpiece to be inserted into a portion of the gap after leaving the roller conveyor. The clamping block is slidably disposed on the tilting table, and there are two clamping blocks. The two clamping blocks move closer to or further away from each other. The opening / closing drive is connected to the clamping block and is used to drive the clamping block to move closer to or further away from each other.

[0013] Furthermore, in some preferred embodiments, the tilting table is connected to a rotary joint, the fixed part of the rotary joint is connected to the frame, the fixed part of the rotary joint is used to connect to an external vacuum pump, and the movable part of the rotary joint is coaxially connected to the tilting table; the tilting table is provided with a surrounding groove air passage, one end of the surrounding groove air passage is connected to the movable part of the rotary joint, and the other end is connected to the bottom of the protective surrounding groove; the opening and closing drive is a pneumatically driven structure, the opening and closing drive is connected to the movable part of the rotary joint, negative pressure causes the opening and closing drive to bring the two clamping blocks closer to each other, and positive pressure causes the opening and closing drive to move the two clamping blocks away from each other.

[0014] Furthermore, in a preferred embodiment, the opening / closing drive is a single-acting cylinder, and the piston rod of one of the opening / closing drive is connected to one of the clamping blocks.

[0015] Furthermore, in a preferred embodiment, a protective pad is provided at the edge of the groove of the protective enclosure.

[0016] Furthermore, in a preferred embodiment, the frame is provided with an air knife and a heating assembly, both of which are located above the roller conveyor and are distributed sequentially along the conveying direction of the roller conveyor.

[0017] Furthermore, in some preferred embodiments, the frame is provided with a roller brush and a nozzle, both of which are located above the roller conveyor. The nozzle and the roller brush are distributed sequentially along the conveying direction of the roller conveyor. The roller brush is slidably connected to the frame in an adjustable manner, with the sliding direction being vertical. The nozzle is rotatably connected to the frame in an adjustable manner, with the rotation axis being parallel to the conveying direction of the roller conveyor.

[0018] Compared with the prior art, the display glass substrate cleaning machine provided in this embodiment of the present invention has the following advantages: 1. Using adjustable nozzles and roller brushes, the glass substrate is placed on a roller conveyor. After being cleaned by the adjustable nozzles and roller brushes, one side of the glass substrate can be cleaned. Then, by using a flipping device, the cleaned glass substrate is flipped onto another roller conveyor for cleaning. In this way, both sides of the glass substrate can be cleaned.

[0019] 2. Using an air knife and heating element, the cleaned glass substrate is blown away by the air knife to remove most of the water droplets on the surface of the glass substrate, and then dried by the heating element. This ensures that the dried glass substrate will not have watermarks as much as possible. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a partial structural schematic diagram of the present invention.

[0022] Figure 3 This is a utility model Figure 1 A magnified view of a portion of point A in the middle.

[0023] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Roller conveyor; 3. Tilting table; 4. Clamping assembly; 41. Protective enclosure block; 42. Clamping block; 43. Opening and closing drive component; 5. Rotary joint; 6. Protective enclosure groove; 61. Protective pad; 7. Air knife; 8. Heating assembly; 9. Nozzle; 10. Roller brush. Detailed Implementation

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0026] This utility model provides a display screen glass substrate cleaning machine.

[0027] Reference Figure 1-2The device includes a frame 1, a roller conveyor 2, a tilting table 3, and a clamping assembly 4. The frame 1 serves as the mounting base for the device and is typically placed on a level surface. The roller conveyor 2 is horizontally mounted on the frame 1 and uses multiple rollers to rotate together to transport workpieces, forming a workpiece conveying assembly line with the frame 1. The tilting table 3 is driven to rotate and is mounted on the frame 1, with its rotation axis parallel to the transport direction of the roller conveyor 2. The purpose of the tilting table 3 is to flip the workpiece, hence its rotating position on the frame 1. The clamping assembly 4 is mounted on the tilting table 3 and is used to clamp the two opposite small faces of the workpiece. The function of the clamping assembly 4 is to fix the workpiece to be flipped, thereby achieving stable flipping. The reason for clamping the two opposite small faces is that the device is mainly used to clean the two opposite large faces of a glass substrate, and clamping the two opposite small faces ensures that the cleaned large faces are not contaminated by the clamping.

[0028] Based on the aforementioned roller conveyor 2, the purpose is to transport workpieces by utilizing the rotation of multiple rollers. Besides roller conveyor 2, belt conveyors can also transport workpieces, using a conveyor belt to achieve the same purpose. Both methods operate on the same principle, but differ in their application. Roller conveyor 2 is primarily used for transporting objects with flat bottoms where the contact area between the object and the rollers is small. Belt conveyors, on the other hand, are primarily used for transporting irregularly shaped objects with uneven bottoms where one side of the object is in full contact with the belt. Choosing roller conveyor 2 offers the following advantages: First, since this device is used to clean glass substrates by conveying them, and glass substrates are flat and regular objects, placing them on roller conveyor 2 results in a small contact area, preventing large-area contamination of the glass substrate. Second, the large amount of water generated during rinsing of the glass substrates can flow away through the gaps between the rollers, preventing water accumulation. Therefore, roller conveyor 2 is more suitable for this application.

[0029] In summary, when the glass substrate is placed on the roller conveyor 2, the roller conveyor 2 moves forward under the drive of the power source. When it reaches the predetermined position, the clamping component 4 clamps the glass substrate. Then, the flipping table 3 drives the clamping component 4 to flip the glass substrate. By flipping the glass substrate, the device can clean one side of the glass substrate and then clean the other side, so as to ensure that both sides of the glass substrate are clean.

[0030] In this embodiment, the number of roller conveyors 2 can be one or two. When there is only one roller conveyor 2, the tilting table 3 and the clamping assembly 4 will not be located on the conveying path of the roller conveyor 2, but need to be located on both sides of the conveying path of the roller conveyor 2. In this case, there need to be two tilting tables 3, and the two clamping blocks 42 of the clamping assembly 4 will be located on the two tilting tables 3 respectively. Since the clamping assembly 4 contacts the small surface of the workpiece, the motion synchronization of the two tilting tables 3 is required to be relatively high in this way.

[0031] When there are two roller conveyors 2, the turning table 3 and the clamping assembly 4 can be located in the area between the two roller conveyors 2. This area is the turning zone. After the workpiece leaves the first roller conveyor 2, the front end of the workpiece is in the turning zone. Before the workpiece enters the second roller conveyor 2, the rear end of the workpiece is in the turning zone. At this time, only one turning table 3 is needed. The two clamping blocks 42 of the clamping assembly 4 can be set on one turning table 3. In this way, it is easier to stably clamp the small face of the workpiece.

[0032] In summary, of the two implementation methods mentioned above, the preferred roller conveyor 2 has two implementation methods.

[0033] Reference Figure 1 When there are two roller conveyors 2, they can be set at different heights, or they can be set at the same height. Considering the manufacturing cost of the equipment and the stability of the transfer after flipping, the method of setting them at the same height is preferred.

[0034] Furthermore, considering the convenience of workpiece transfer, the workpiece is arranged in a U-shape along the conveying path of the two roller conveyors 2. Based on this, the two roller conveyors 2 are arranged so that their long sides can be arranged parallel and spaced apart.

[0035] Reference Figure 1 and Figure 3 To achieve the cleaning function of this device, a roller brush 10 and a nozzle 9 are provided on the frame 1. The roller brush 10 and the nozzle 9 are both located above the roller conveyor 2. The nozzle 9 and the roller brush 10 are distributed sequentially along the conveying direction of the roller conveyor 2. The nozzle 9 is used to spray out cleaning agent, and the roller brush 10 is used to brush the glass substrate.

[0036] The setting of the roller brush 10 needs to take into account the following factors. Specifically, since different displays are made of glass substrates of different thicknesses and sizes, the height of the roller brush 10 needs to be adjusted according to the different thicknesses of the glass substrates when brushing them. This ensures that the bristles of the roller brush 10 can not only brush the glass substrates, but also prevent the bristles from scratching the glass substrates because the position of the roller brush 10 is too low. Therefore, the roller brush 10 and the frame 1 are connected by an adjustable sliding connection to realize the change of distance between the roller brush 10 and the roller conveyor 2.

[0037] Specifically, regarding whether the adjustable sliding connection has a power source or not, using a power source to adjust the height of the roller brush 10 allows for more convenient and precise adjustment of the height position of the roller brush 10. However, based on the purpose and operating environment of the device, the roller brush 10 is located near the nozzle 9, and the nozzle 9 sprays out a large amount of cleaning agent and water. In this environment, the adjustment method with a power source may cause the power source to be easily damaged.

[0038] In this embodiment, a manual adjustment method is preferably used to adjust the height of the roller brush 10. Specifically, the frame 1 at the connection between the roller brush 10 and the frame 1 has a groove that allows the roller brush 10 to slide up and down. Bolts are provided at both ends of the roller brush, and the threaded part of the bolt passes through the groove on the frame 1. The nut and the bolt cooperate to make the nut abut against the groove on the frame 1, which can fix the roller brush 10. When it is necessary to adjust the height of the roller brush 10, simply loosen the nut so that the bolts connected to both ends of the roller brush 10 slide in the groove on the frame 1.

[0039] The nozzle 9 setting needs to take into account the following factors: different displays use glass substrates of different sizes. When cleaning the glass substrates, different sizes of glass substrates need to be adapted to different rinsing ranges. Therefore, the nozzle 9 and the frame 1 are connected by an adjustable rotatable connection. With this connection method, for some glass substrates that are too large or too small, the angle of the nozzle 9 can be adjusted to achieve a thorough cleaning of the glass substrate.

[0040] Specifically, the adjustable rotatable connection between the nozzle 9 and the frame 1 is a universal ball joint damping shaft connection. This connection method allows for arbitrary adjustment of the nozzle 9's angle, enabling the nozzle 9 to thoroughly clean the glass substrate. In other embodiments, this adjustable rotatable connection can also be powered by a micro motor, allowing the nozzle 9 to rotate.

[0041] The most important step after cleaning the glass substrate is to dry it. The dried glass substrate should not have watermarks. The reason why watermarks remain after drying is mostly because water droplets remain on the glass substrate. Incorrect temperature settings during high-temperature baking can also cause watermarks to remain after drying.

[0042] Reference Figure 1To address the aforementioned issues, specifically, an air knife 7 and a heating assembly 8 are installed on the frame 1. Both the air knife 7 and the heating assembly 8 are located above the roller conveyor 2 and are distributed sequentially along the conveying direction of the roller conveyor 2. The air knife 7 is an industrial device that uses compressed air or other gases to generate a high-speed, uniform airflow, primarily used for industrial applications such as blowing, drying, cooling, cleaning, and separation. In this embodiment, the air knife 7 disperses most of the water droplets on the surface of the cleaned glass substrate through high-speed air blowing. The heating assembly 8 further heats and dries the glass substrate after it has been blown by the air knife 7. The combined drying effect of the air knife 7 and the heating assembly 8 ensures that no watermarks remain on the glass substrate after drying.

[0043] In summary, the glass substrate is transported by the roller conveyor 2, and then cleaned by the rinsing of the nozzle 9 and the brushing of the roller brush 10. After cleaning, the glass substrate is dried by the dual drying of the air knife 7 and the heating component 8, ensuring that no watermarks remain after the glass substrate is dried.

[0044] As mentioned above, in this embodiment, to better clean the glass substrate, one side is cleaned first, and then the other side is cleaned by flipping it over. Also mentioned above, for the conveying and cleaning of the flipped glass substrate, two roller conveyors 2 are used, along with a flipping table 3 and a clamping assembly 4.

[0045] Reference Figure 1-2 Specifically, the clamping assembly 4 includes a protective block 41, a clamping block 42, and an opening / closing drive 43. The protective block 41 is annular and is mounted on the tilting table 3. A protective groove 6 is formed between the inner side of the protective block 41 and the surface of the tilting table 3. The center line of the protective groove 6 is not coaxial with the center line of the tilting table 3. The protective groove 6 allows the workpiece to be inserted into the gap after leaving the roller conveyor 2. The clamping block 42 is slidably mounted on the tilting table 3, and there are two clamping blocks 42. The two clamping blocks 42 move closer to or further away from each other. The opening / closing drive 43 is connected to the clamping blocks 42 and is used to drive the clamping blocks 42 to move closer to or further away from each other. Under the action of the opening / closing drive 43, the two clamping blocks 42 clamp or release two opposite small faces of the glass substrate.

[0046] In summary, the clamping block 42 is used to clamp the workpiece, and the protective enclosure block 41 is set so that when the clamping force of the clamping block 42 becomes unstable, the workpiece can be stuck in the protective enclosure groove 6 to prevent the workpiece from falling off.

[0047] Specifically, in order to further improve the flipping stability of the workpiece, the flipping table 3 is connected to a rotary joint 5. The rotary joint 5 is a precision mechanical device that transmits fluid (liquid, gas, hydraulic oil, etc.) or electrical signals between a stationary pipeline and a rotating device. Its core function is to maintain continuous transmission of the medium without leakage in a relative rotational state.

[0048] The fixed part of the rotary joint 5 is connected to the frame 1. The fixed part of the rotary joint 5 is used to connect to an external vacuum pump. The movable part of the rotary joint 5 is coaxially connected to the tilting table 3. The tilting table 3 is provided with a surrounding groove air passage. One end of the surrounding groove air passage is connected to the movable part of the rotary joint 5, and the other end is connected to the bottom of the protective surrounding groove 6. This can create a negative pressure atmosphere in the protective surrounding groove 6 to improve the stability of the flipping. In addition, after the workpiece is flipped, the protective surrounding groove 6 can also create a positive pressure atmosphere to push the workpiece toward the roller conveyor 2 to improve the smoothness of the connection between the flipped workpiece and the roller conveyor 2.

[0049] To optimize the structure of the clamping assembly 4, the opening and closing drive 43 adopts a pneumatic drive structure. The opening and closing drive 43 is a single-acting cylinder with spring return, that is, the piston rod is retracted by a spring. Specifically, the piston rod of the opening and closing drive 43 is connected to a clamping block 42, and the air port of the opening and closing drive 43 is connected to the movable part of the rotary joint 5 to realize the connection between the external vacuum pump and the opening and closing drive 43.

[0050] When the vacuum pump generates negative pressure, the piston rod of the opening and closing drive component 43 will retract under the action of its own spring, so that the clamping blocks 42 will move closer to each other. When the vacuum pump generates positive pressure, the piston rod of the opening and closing drive component 43 will extend under the action of air pressure, so that the clamping blocks 42 will move away from each other, thereby realizing the clamping and releasing of the workpiece. In addition, the same air pressure change rhythm is used to change the working state of the opening and closing drive component 43 and the protective enclosure 6, so the structure of the equipment can be simplified.

[0051] Furthermore, in order to prevent the glass substrate from being damaged by the edge of the groove 6, a protective pad 61 is provided at the edge of the groove 6. The protective pad 61 is made of an elastic material.

[0052] In summary, the present invention can achieve deep cleaning of both large surfaces of a glass substrate, and the cleaned glass substrate will not leave watermarks after drying.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A glass substrate cleaning machine for display screens, characterized in that: Rack (1); Roller conveyor (2) is horizontally mounted on the frame (1); A tilting table (3) is driven to rotate and is mounted on the frame (1). The rotation axis of the tilting table (3) is parallel to the conveying direction of the roller conveyor (2). A clamping assembly (4) is disposed on the flipping table (3) and is used to clamp two opposite small faces of the workpiece.

2. The display glass substrate cleaning machine according to claim 1, characterized in that: There are two roller conveyors (2), which are set at the same height. There is a turning area between the two roller conveyors (2) for the turning table (3) and the clamping assembly (4). The turning area is for the part of the workpiece that leaves the roller conveyor (2) to enter.

3. The display glass substrate cleaning machine according to claim 2, characterized in that: The workpiece is arranged in a U-shape along the conveying path of the two roller conveyors (2).

4. A display screen glass substrate cleaning machine according to claim 1, characterized in that: The clamping assembly (4) includes a protective block (41), a clamping block (42), and an opening and closing drive (43). The protective block (41) is disposed on the tilting table (3). A protective groove (6) is formed between the inner side of the protective block (41) and the surface of the tilting table (3). The center line of the protective groove (6) is not coaxial with the center line of the tilting table (3). The protective groove (6) allows the workpiece to be inserted into the gap after leaving the roller conveyor (2). The clamping block (42) is slidably disposed on the tilting table (3). There are two clamping blocks (42). The two clamping blocks (42) move closer to each other or further away from each other. The opening and closing drive (43) is connected to the clamping block (42) and is used to drive the clamping block (42) to move closer to each other or further away from each other.

5. A display screen glass substrate cleaning machine according to claim 4, characterized in that: The tilting table (3) is connected to a rotary joint (5). The fixed part of the rotary joint (5) is connected to the frame (1). The fixed part of the rotary joint (5) is used to connect to an external vacuum pump. The movable part of the rotary joint (5) is coaxially connected to the tilting table (3). The tilting table (3) is provided with a surrounding groove air passage. One end of the surrounding groove air passage is connected to the movable part of the rotary joint (5), and the other end is connected to the bottom of the protective surrounding groove (6). The opening and closing drive (43) is a pneumatically driven structure. The opening and closing drive (43) is connected to the movable part of the rotary joint (5). Negative pressure causes the opening and closing drive (43) to bring the two clamps (42) closer to each other, and positive pressure causes the opening and closing drive (43) to move the two clamps (42) away from each other.

6. A display screen glass substrate cleaning machine according to claim 5, characterized in that: The opening and closing drive (43) is a single-acting cylinder, and the piston rod of one of the opening and closing drive (43) is connected to one of the clamps (42).

7. A display screen glass substrate cleaning machine according to claim 4, characterized in that: A protective pad (61) is provided at the edge of the groove of the protective enclosure (6).

8. A display screen glass substrate cleaning machine according to claim 2, characterized in that: The frame (1) is equipped with an air knife (7) and a heating component (8). The air knife (7) and the heating component (8) are both located above the roller conveyor (2). The air knife (7) and the heating component (8) are distributed sequentially along the conveying direction of the roller conveyor (2).

9. A display screen glass substrate cleaning machine according to claim 2, characterized in that: The frame (1) is equipped with a roller brush (10) and a nozzle (9). The roller brush (10) and the nozzle (9) are both located above the roller conveyor (2). The nozzle (9) and the roller brush (10) are distributed sequentially along the conveying direction of the roller conveyor (2). The roller brush (10) is slidably connected to the frame (1) in an adjustable manner, and the sliding direction is vertical. The nozzle (9) is rotatably connected to the frame (1) in an adjustable manner, and the rotation axis is parallel to the conveying direction of the roller conveyor (2).

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