Screen washing device and automatic screen cleaning system

Abstract

The utility model discloses a screen washing device and an automatic screen cleaning system. The screen washing device comprises a first washing assembly, a second washing assembly and a pressure control mechanism, wherein the first washing assembly and the second washing assembly are correspondingly arranged on the two sides of the screen in the thickness direction. The pressure control mechanism can apply pressure to at least one of the two slurry chambers, so that slurry flows out of the first slurry opening or the second slurry opening to wash meshes of the screen printing plate, the meshes of the screen printing plate are circularly washed, and cleaning of the interiors of the meshes of the screen printing plate is facilitated. A wiping device is further arranged and used for wiping the surface of the screen printing plate. The first washing assembly, the second washing assembly and the wiping device are all automatically controlled through the control device. By means of the arrangement mode, automatic cleaning of the surface of the screen printing plate and the interiors of the meshes of the screen printing plate can be achieved, then the cleaning time of the screen printing plate can be saved, and the cleaning effect of the screen printing plate can be improved.

Description

Technical Field

[0001] This application relates to the field of solar cell process equipment, and in particular to a screen washing device and an automatic screen cleaning system. Background Technology

[0002] Currently, in the production of photovoltaic cells, screen printing is widely used to form the front and back electrodes of solar cells due to its mature technology, simple process, and easy precision control. During printing, paste is poured into one end of the screen, and a squeegee applies pressure to the paste area while moving towards the other end of the screen. This forces the paste through the mesh of the pattern area onto the solar cell. Because the printing requires extremely high precision, even slightly large paste particles or dust on the cell surface can lead to localized grid breaks.

[0003] In most cases where screen breaks, printing is stopped, the screen is raised, and the surface is manually wiped repeatedly with a lint-free cloth before the printing press is restarted. However, if dust or particles become stuck in the screen's holes, the only solution is to manually scrape them repeatedly with sharp objects. This manual method of handling broken screens is cumbersome and inefficient, impacting the production efficiency of screen printing. Utility Model Content

[0004] This utility model discloses a screen washing device and an automatic screen cleaning system, which facilitates the automation of screen cleaning and thus improves the production efficiency of screen printing.

[0005] To achieve the above objectives, the first aspect of this utility model discloses a screen washing device, comprising:

[0006] A first rinsing assembly includes a first slurry chamber for storing slurry, and the first slurry chamber is provided with a first slurry outlet corresponding to the mesh openings of the screen.

[0007] A second rinsing assembly is configured to be located on both sides of the screen along the thickness direction, the second rinsing assembly including a second slurry chamber for storing slurry, and the second slurry chamber having a second slurry outlet corresponding to the mesh opening of the screen. Along the thickness direction of the screen, the second slurry chamber and the first slurry chamber are correspondingly arranged so that the second slurry outlet communicates with the first slurry outlet.

[0008] A pressure control mechanism connected to the first slurry chamber and the second slurry chamber, the pressure control mechanism being configured to apply pressure to at least one of the first slurry chamber and the second slurry chamber to cause the slurry to flow out from the first slurry outlet or the second slurry outlet to wash the mesh of the screen.

[0009] As an alternative implementation, the pressure control mechanism is configured to alternately apply positive and negative pressure to one of the first slurry chamber and the second slurry chamber.

[0010] As an optional implementation, the first flushing assembly further includes a first filter element disposed at the first slurry outlet;

[0011] The second flushing assembly further includes a second filter element, which is disposed at the second slurry outlet;

[0012] Both the first filter element and the second filter element have multiple filter holes, which are connected to the mesh of the screen.

[0013] As an optional implementation, the screen washing device further includes a slurry replenishment device, which is connected to the first washing assembly and / or the second washing assembly via a pipe. The pipe is provided with a temperature regulating mechanism configured to regulate the temperature of the slurry in the pipe.

[0014] As an optional implementation, the temperature regulating mechanism includes a heating element or a cooling element, and a temperature sensor is also provided on the pipe. The temperature sensor is used to detect the temperature of the slurry in the pipe so that the temperature regulating mechanism can heat or cool the slurry.

[0015] As an optional implementation, the screen washing device further includes a moving mechanism connected to the first washing component and the second washing component, the moving mechanism being configured to allow the first washing component and the second washing component to move along the length direction and / or width direction of the screen.

[0016] Secondly, this utility model also discloses an automatic screen cleaning system, including a screen printing device, a wiping device, and a screen rinsing device as described in the first aspect above. The screen printing device includes a printing table and a screen disposed on the printing table. The wiping device is configured to wipe the surface of the screen. The first rinsing component and the second rinsing component of the screen rinsing device are configured to rinse the mesh of the screen.

[0017] As an optional implementation, the screen printing equipment further includes a power mechanism connected to the screen, so that the screen is movably disposed on the printing table along a first direction;

[0018] The automatic screen cleaning system also includes a control device and a vision detection device, wherein the control device is electrically connected to the power mechanism, the vision detection device and the wiping device;

[0019] The visual inspection device is configured to detect the printing status of the screen printing plate. The control device is configured to determine the position of the broken grid according to the printing status of the screen printing plate, and to control the screen printing plate to move away from the printing table along the first direction according to the position of the broken grid. The control device is also configured to control the wiping device to wipe the surface of the screen printing plate, and the control device is also configured to control the pressure control mechanism to apply pressure to one of the first flushing assembly and the second flushing assembly after the wiping device has finished wiping, so as to flush the mesh of the screen printing plate.

[0020] The first direction is the height direction of the printing table.

[0021] As an optional implementation, the wiping device includes:

[0022] Wipe head;

[0023] A cleaning component is disposed on the wiping head and configured to abut against the screen to wipe the surface of the screen.

[0024] An unwinding mechanism is disposed on one side of the wiping head; and

[0025] A winding mechanism is provided on the other side of the wiping head. The two ends of the cleaning component are respectively wound around the unwinding mechanism and the winding mechanism. The unwinding mechanism is used to unwind the cleaning component, and the winding mechanism is used to recycle the used cleaning component.

[0026] As an optional implementation, the unwinding mechanism includes an unwinding roller and a first driving member, the first driving member being used to drive the unwinding roller to rotate; the winding mechanism includes a winding roller and a second driving member, the second driving member being used to drive the winding roller to rotate.

[0027] The wiping device further includes a counter disposed on the wiping head. The counter is configured to record the number of times the cleaning component is wiped, and when the number of times the cleaning component is wiped reaches a preset number, to send a signal to the first drive member and the second drive member, so that the unwinding roller unwinds the cleaning component and the winding roller winds up the used cleaning component.

[0028] Compared with the prior art, the beneficial effects of this application are:

[0029] This utility model provides a screen washing device. By setting a first washing component and a second washing component, a pressure control device can apply pressure to the first washing component and / or the second washing component, so that the slurry can flow out from the first slurry outlet and / or the second slurry outlet under pressure. Since the first slurry outlet and the second slurry outlet are connected to the mesh of the screen, the flowing slurry can wash the mesh under pressure, which helps to automate the cleaning of the inside of the screen mesh and thus improves the cleaning efficiency.

[0030] Secondly, this utility model also provides an automatic screen cleaning system, including a screen printing device, a wiping device, and a screen rinsing device as described in the first aspect. The screen printing device includes a printing table and a screen disposed on the printing table. The wiping device is configured to wipe the surface of the screen, and the first and second rinsing components of the screen rinsing device are configured to rinse the mesh openings of the screen. This arrangement allows for the wiping device to remove dust from the screen surface, and the first and second rinsing components to clean particles within the mesh openings, thus saving screen cleaning time and improving the overall production efficiency of screen printing. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of the network version in the related technology;

[0033] Figure 2 This is a schematic diagram of the screen washing device disclosed in the embodiments of this application;

[0034] Figure 3 This is another structural schematic diagram of the screen washing device (partial structure omitted) disclosed in the embodiments of this application;

[0035] Figure 4 This is a schematic diagram of the first flushing component and the second flushing component disclosed in the embodiments of this application in their standby states;

[0036] Figure 5 This is a schematic diagram of the automatic screen cleaning system disclosed in the embodiments of this application;

[0037] Figure 6This is a side view of the wiping device disclosed in the embodiments of this application;

[0038] Figure 7 This is a top view of the wiping device disclosed in the embodiments of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 100-Screen washing device; 1-First washing assembly; 11-First slurry chamber; 111-First slurry outlet; 12-First filter element; 2-Second washing assembly; 21-Second slurry chamber; 211-Second slurry outlet; 22-Second filter element; 3-Pressure control mechanism; 4-Slurry replenishment device; 41-Pipeline; 411-Temperature regulation mechanism; 412-Temperature sensor; 5-Moving mechanism; 200-Automatic screen cleaning system; 6-Screen printing equipment; 61-Printing table; 62-Screen; 621-Mesh opening; 63-Power mechanism; 7-Wiping device; 71-Wiping head; 711-Counter; 72-Cleaning component; 73-Unwinding mechanism; 731-Unwinding roller; 732-First drive element; 74-Rewinding mechanism; 741-Rewinding roller; 742-Second drive element; 8-Control device; 9-Vision inspection device; X-First direction. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] In this application, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0043] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0044] Furthermore, the terms "set up," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0045] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0046] After texturing, diffusion, and coating processes, solar cells have formed PN junctions and can generate current under sunlight. However, to conduct this current, electrodes need to be fabricated on the cell surface. Screen printing is currently the most common process for fabricating contact electrodes for solar cells. The quality of the grid lines produced by screen printing has a significant impact on the overall quality of the solar cell production.

[0047] Screen printing is a printing method that uses a squeegee to force ink through a screen and transfer it to the surface of a solar cell. Please refer to [link / reference]. Figure 1 , Figure 1 This is a schematic diagram of the screen printing plate in related technologies. During the printing process, dust on the surface of the solar cell or in the printing space can cause foreign objects to adhere to the screen 62, blocking the mesh openings 621 and resulting in broken grid lines. Additionally, dust or paste particles from the printing paste may also become stuck in the mesh openings 621 of the screen 62, causing a fixed broken grid line to consistently appear at the same location. All of these situations directly affect the screen printing effect, leading to localized broken grid lines on the solar cell.

[0048] In related technologies, manual operation is often performed in the printing area, using a lint-free cloth to wipe the surface of the screen 62 or repeatedly scraping the mesh openings 621 of the screen with sharp-edged objects. This manual method of handling broken grids is cumbersome and inefficient, greatly affecting the overall production efficiency of screen printing. In addition, wiping the surface 62 of the screen with a lint-free cloth cannot effectively remove the paste particles in the mesh openings 621, and the cleaning effect does not meet expectations.

[0049] In view of this, embodiments of this application disclose a screen washing device and an automatic screen cleaning system. By using a first washing component and a second washing component correspondingly arranged along the thickness direction of the screen, pressure is applied to the first washing component and / or the second washing component to circulate the slurry within the first and second washing components, washing the mesh openings of the screen, thus facilitating cleaning of the mesh openings. A wiping device is also provided to wipe the surface of the screen, further improving the cleaning effect. Furthermore, a control device controls the power mechanism to move the screen relative to the printing table, and the control device controls the wiping device and the screen washing device to clean the screen, facilitating automated screen cleaning and thus improving the cleaning efficiency.

[0050] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0051] Please see Figure 2 , Figure 2 This is a schematic diagram of the screen printing plate washing device disclosed in an embodiment of this application. Wherein, Figure 2 The curve connecting the pressure control mechanism 3 to the first slurry chamber 11 and the second slurry chamber 21 is used to represent the connection relationship between the pressure control mechanism 3 and the first slurry chamber 11 and the second slurry chamber 21, respectively. The screen washing device 100 includes a first washing assembly 1, which is disposed above the screen 62. The first washing assembly 1 includes a first slurry chamber 11, which is used to store slurry, and the first slurry chamber 11 is provided with a first slurry outlet 111 corresponding to the mesh 621 of the screen 62. The first slurry outlet 111 is located on the side of the first slurry chamber 11 adjacent to the screen 62.

[0052] The screen washing device 100 includes a second washing assembly 2, which is disposed below the screen 62. The second washing assembly 2 includes a second slurry chamber 21 for storing slurry, and the second slurry chamber 21 is provided with a second slurry outlet 211 corresponding to the mesh openings 621 of the screen 62. The second slurry outlet 211 is located on the side of the second slurry chamber 21 adjacent to the screen 62. Along the thickness direction of the screen 62, the second slurry chamber 21 is correspondingly arranged with the first slurry chamber 11, so that the second slurry outlet 211 communicates with the first slurry outlet 111.

[0053] The screen washing device 100 includes a pressure control mechanism 3 connected to a first slurry chamber 11 and a second slurry chamber 21. The pressure control mechanism 3 is configured to apply pressure to at least one of the first slurry chamber 11 and the second slurry chamber 21 to cause slurry to flow out from the first slurry outlet 111 or the second slurry outlet 211 to wash the mesh 621 of the screen 62.

[0054] By arranging corresponding first flushing components 1 and second flushing components 2 on both sides along the thickness direction of the screen 62, and controlling the pressure in the first slurry chamber 11 and the second slurry chamber 21 through the pressure control mechanism 3, the pressure on the slurry in the first slurry chamber 11 and the second slurry chamber 21 is changed, causing it to flow in the first slurry chamber 11 and the second slurry chamber 21, thus allowing the slurry to flush the mesh 621 of the screen 62. On the one hand, compared with the manual cleaning method of repeatedly scraping the mesh 621 of the screen 62 with some sharp objects, it helps to improve the convenience and efficiency of cleaning the mesh 621 of the screen 62. On the other hand, the slurry used for cleaning is the same as the slurry used for printing, avoiding the situation where the use of other types of cleaning agents to clean the mesh 621 causes contamination to the printing process, thereby helping to ensure the quality of printing.

[0055] The first slurry chamber 11 is provided with a first slurry outlet corresponding to the mesh opening 621 of the screen 62, and the second slurry chamber 21 is provided with a second slurry outlet corresponding to the mesh opening 621 of the screen 62. The provision of the first slurry outlet and the second slurry outlet helps to allow slurry to flow out of the slurry chamber and into the mesh opening 621 of the screen 62, thereby achieving the washing of the mesh opening 621 of the screen 62.

[0056] In addition, the first slurry chamber 11 and the second slurry chamber 21 are arranged correspondingly along the thickness direction of the screen 62 so that the first slurry outlet 111 and the second slurry outlet 211 are connected. This arrangement helps the slurry to flow smoothly between the first slurry chamber 11 and the second slurry chamber 21 under the control of the pressure control mechanism 3, so as to realize the slurry scouring the mesh 621 of the screen 62.

[0057] In some embodiments, the pressure control mechanism 3 is configured to alternately apply positive and negative pressure to one of the first slurry chamber 11 and the second slurry chamber 21. For example, the frequency of pressure application by the pressure control mechanism 3 can be set, such as applying negative pressure to the first slurry chamber 11 for 30 seconds, then applying positive pressure to the first slurry chamber 11 for 30 seconds, and repeating the above operation alternately. The specific frequency of pressure application can be set according to actual conditions, and this embodiment does not specifically limit it.

[0058] This alternating application of positive and negative pressure allows the slurry to circulate between the first slurry chamber 11 and the second slurry chamber 21, thereby helping to achieve the cleaning effect by circulating the slurry to flush the mesh 621 of the screen 62.

[0059] It is understood that the pressure control mechanism 3 can be implemented in various ways. In one example, the pressure control mechanism 3 can be a dual-purpose positive and negative pressure vacuum pump, which can simultaneously perform positive and negative pressure pumping operations with a single vacuum pump, thus improving the economy of the pressure control mechanism 3. In another example, the pressure control mechanism 3 may include a positive pressure vacuum pump and a negative pressure vacuum pump, which perform positive and negative pressure pumping operations respectively. This approach helps to improve the independence of the positive and negative pressure pumping operations. This embodiment does not specifically limit this approach.

[0060] Furthermore, the pressure control mechanism 3 can apply pressure to the first slurry chamber 11 and the second slurry chamber 21 in various ways. In one example, when applying pressure to the first slurry chamber 11 and the second slurry chamber 21 respectively, a single positive and negative pressure vacuum pump can be used to apply pressure to either the first slurry chamber 11 or the second slurry chamber 21 individually. This configuration uses the fewest pressure control mechanisms 3, and the connection between the pressure control mechanism 3 and the slurry chamber is also the simplest. Alternatively, a positive pressure vacuum pump and a negative pressure vacuum pump can be used simultaneously to apply pressure to the first slurry chamber 11 and the second slurry chamber 21, performing positive pressure and negative pressure operations respectively. This method helps to improve the independence of the positive pressure and negative pressure operations.

[0061] In another example, when pressure is applied to the first slurry chamber 11 and the second slurry chamber 21 simultaneously, a dual-purpose positive and negative pressure vacuum pump can be connected to the first slurry chamber 11 and the second slurry chamber 21 to apply pressure to both chambers at the same time. This setup can achieve simultaneous pressure application to both slurry chambers through a single pressure control mechanism 3, resulting in higher equipment integration. Alternatively, a positive pressure vacuum pump and a negative pressure vacuum pump can be used to apply pressure to the first slurry chamber 11 and the second slurry chamber 21 as a whole, and the positive and negative pressure operations can be performed separately. This approach helps to improve the independence of the positive and negative pressure operations.

[0062] In some embodiments, please refer to Figure 2The first flushing assembly 1 further includes a first filter element 12, which is disposed at the first slurry outlet 111. The second flushing assembly 2 further includes a second filter element 22, which is disposed at the second slurry outlet 211. Both the first filter element 12 and the second filter element 22 have multiple filter holes, which communicate with the mesh openings 621 of the screen 62. The arrangement of the first filter element 12 and the second filter element 22 helps to filter the outflowing slurry, preventing large particles or dried slurry from flowing out and causing re-clogging of the mesh openings. The multiple filter holes on the first filter element 12 and the second filter element 22 help to allow the slurry to flow out from the first slurry chamber 11 or the second slurry chamber 21 into the mesh openings 621 of the screen 62 when pressure is applied by the pressure control mechanism 3, thereby flushing the mesh openings 621 of the screen 62.

[0063] Specifically, the first filter element 12 and the second filter element 22 can be stainless steel mesh, nylon mesh, or polyester mesh. This embodiment does not impose any specific limitations on this.

[0064] Optionally, the aperture size of the filter holes on the first filter element 12 and the second filter element 22 is much smaller than the opening size of the first slurry outlet 111 and the second slurry outlet 211, which helps to prevent the slurry in the first slurry chamber 11 and the second slurry chamber 21 from flowing out there.

[0065] It is understood that the first filter element 12 and the second filter element 22, along with their corresponding slurry chambers, can be integrally formed or separately manufactured and then connected. Integral manufacturing helps to streamline the production process of the flushing assembly and also helps to ensure a tighter connection between the filter element and the slurry chamber. Separate manufacturing and reconnection helps to improve the flexibility of the connection between the filter element and the slurry chamber, and also facilitates easy replacement when the filter element is damaged. This embodiment does not impose specific limitations on this.

[0066] In some embodiments, please refer to Figure 2The screen printing plate washing device 100 also includes a slurry replenishing device 4. There are several embodiments for the connection between the slurry replenishing device 4 and the first washing assembly 1 and the second washing assembly 2. In one example, the slurry replenishing device 4 is connected to either the first slurry chamber 11 or the second slurry chamber 21 via a pipe 41. In this case, the slurry is replenished from one side of the first slurry chamber 11 or the second slurry chamber 21. This arrangement only requires a pipe to be connected to the slurry replenishing device 4 in one of the first slurry chamber 11 or the second slurry chamber 21, which helps to reduce the number of pipes 41 and thus improves the economy of the screen printing plate washing device 100. In another example, the slurry replenishing device 4 is connected to both the first washing assembly 1 and the second washing assembly 2 via pipes 41. In this case, the slurry can be replenished from both sides of the first washing assembly 1 and the second washing assembly 2. This method, compared to replenishing only from one side of the first slurry chamber 11 or the second slurry chamber 21, helps to increase the slurry replenishment speed. This embodiment does not specifically limit this method.

[0067] Optionally, please refer to Figure 1 and Figure 2 The aforementioned pipe 41 is equipped with a temperature regulating mechanism 411, which is used to regulate the temperature of the paste within the pipe 41. By adjusting the temperature of the paste, its viscosity can be changed, thereby altering the scouring force. For example, when the temperature regulating mechanism 411 raises the temperature of the paste within the pipe 41, the viscosity of the paste can be reduced, helping to soften impurity particles. When the temperature regulating mechanism 411 lowers the temperature of the paste within the pipe 41, it helps to increase the viscosity of the paste, thereby increasing the impact force of the paste and helping to completely flush away particles stuck in the mesh 621. When the paste scouring the mesh 621 of the screen printing plate 62, the force of the paste scouring the mesh 621 can be adjusted according to the actual cleaning situation, thereby improving the flexibility of the paste scouring the mesh 621 and the efficiency of the screen printing plate 62 scouring, thus helping to improve the overall production efficiency of screen printing.

[0068] In some embodiments, please refer to Figure 1 and Figure 2 The aforementioned temperature regulating mechanism 411 includes a heating element or a cooling element, and a temperature sensor 412 is also provided on the pipe 41. The temperature sensor 412 is used to detect the temperature of the paste inside the pipe 41, so that the temperature regulating mechanism 411 heats or cools the paste. This arrangement allows the temperature sensor 412 to monitor the temperature of the paste inside the pipe 41, which helps to flexibly control the temperature of the paste inside the pipe 41. When it is necessary to increase the scouring force of the paste, the paste inside the pipe 41 is heated, and when it is necessary to reduce the scouring force, the paste inside the pipe 41 is cooled, thus achieving flexible control and helping to improve the scouring efficiency of the screen 62, thereby helping to improve the overall efficiency of screen printing.

[0069] In addition, when the first flushing assembly 1 and the second flushing assembly 2 are not performing flushing operations, the slurry in the pipe 41 can be cooled to increase the viscosity of the slurry, thereby helping to prevent the slurry from flowing out between the first slurry chamber 11 and the second slurry chamber 21.

[0070] It is understood that the aforementioned temperature regulating mechanism 411 can be an annular temperature regulating device covering the outside of the pipe 41. Positioning the temperature regulating mechanism 411 outside the pipe 41 helps to avoid affecting the flow of slurry within the pipe 41. Alternatively, the temperature regulating mechanism 411 can be a temperature regulating device disposed within the pipe 41, such as a rod-shaped temperature regulating device extending along the length of the pipe 41 or an annular temperature regulating device disposed close to the inner wall of the pipe 41. Positioning the temperature regulating mechanism 411 within the pipe 41 helps to improve the temperature regulating efficiency of the temperature regulating mechanism 411, resulting in faster temperature adjustment. This embodiment does not specifically limit this aspect.

[0071] It is understood that the temperature adjustment range of the aforementioned temperature adjustment mechanism 411 may be, but is not limited to, 10-40℃, and the specific temperature can be adjusted according to actual usage requirements.

[0072] It is understood that the temperature regulating mechanism 411 and the temperature sensor 412 can be two separate devices, and the two devices are electrically connected, or it can be a separate temperature regulating mechanism 411 with the function of temperature sensor 412. This embodiment does not specifically limit this.

[0073] In some embodiments, please refer to Figure 3 , Figure 3 This is another structural schematic diagram of the screen washing device (partial structure omitted) disclosed in the embodiments of this application. Wherein, Figure 3 The curves connecting the moving mechanism 5 to the first slurry chamber 11 and the second slurry chamber 21 represent the connection relationships between the moving mechanism 5 and the first slurry chamber 11 and the second slurry chamber 21, respectively. The screen washing device 100 also includes the moving mechanism 5, which is connected to the first washing assembly 1 and the second washing assembly 2. The moving mechanism 5 is configured to allow the first washing assembly 1 and the second washing assembly 2 to move along the surface of the screen 62, and the specific direction of movement can have various embodiments. In one example, the moving mechanism 5 allows the first washing assembly 1 and the second washing assembly 2 to move along the length direction of the screen 62, which helps the first washing assembly 1 and the second washing assembly 2 to clean the mesh openings 621 at different positions along the length direction of the screen 62, thus increasing the cleaning range of the first washing assembly 1 and the second washing assembly 2.

[0074] In another example, the moving mechanism 5 allows the first flushing component 1 and the second flushing component 2 to move along the width direction of the screen 62, which helps the first flushing component 1 and the second flushing component 2 to clean the mesh holes 621 at different positions in the width direction of the screen 62, and helps to increase the cleaning range of the first flushing component 1 and the second flushing component 2.

[0075] In another example, the moving mechanism 5 allows the first flushing component 1 and the second flushing component 2 to move along both the length and width of the screen 62, which helps the first flushing component 1 and the second flushing component 2 to clean the mesh holes 621 at different positions on the entire surface of the screen 62, expands the cleaning range of the first flushing component 1 and the second flushing component 2, and also helps to improve the cleaning speed of the first flushing component 1 and the second flushing component 2.

[0076] It is understood that the aforementioned moving mechanism 5 can have multiple embodiments. In one example, the moving mechanism 5 may include a frame with a slide rail. A slider is connected to the first flushing component 1 and the second flushing component 2, and the slider is slidably connected to the slide rail. This allows the first flushing component 1 and the second flushing component 2 to be slidably connected to the frame, thereby enabling the first flushing component 1 and the second flushing component 2 to move along the length and / or width of the screen 62. This arrangement helps improve the smoothness of the movement of the first flushing component 1 and the second flushing component 2.

[0077] In another example, the moving mechanism 5 can be multiple robotic arms, one end of which is connected to the first flushing component 1 and the second flushing component 2, respectively. The robotic arms can move the first flushing component 1 and the second flushing component 2 along the length and / or width of the screen 62. This arrangement helps to improve the movement flexibility of the first flushing component 1 and the second flushing component 2.

[0078] Optionally, please refer to Figure 3 and Figure 4 , Figure 4This is a schematic diagram of the first rinsing assembly 1 and the second rinsing assembly 2 in their standby states, as disclosed in the embodiments of this application. The first rinsing assembly 1 and the second rinsing assembly 2 have standby and cleaning states. When in standby state, the moving mechanism 5 moves the first rinsing assembly 1 and the second rinsing assembly 2 to one side of the screen 62, with the first slurry outlet 111 and the second slurry outlet 211 facing each other and abutting against each other along the thickness direction of the screen 62. When in the cleaning state, the moving mechanism 5 causes the first slurry outlet 111 and the second slurry outlet 211 to abut against both sides of the screen 62 along the thickness direction. By having the first slurry outlet 111 and the second slurry outlet 211 facing each other and abutting against each other along the thickness direction of the screen 62 in the standby state, it helps to prevent slurry seepage and also helps to prevent the slurry in the first slurry chamber 11 and the second slurry chamber 21 from drying out and wasting slurry.

[0079] When the first flushing assembly 1 and the second flushing assembly 2 are in standby mode, the pressure control mechanism 3 applies negative pressure to at least one of the first slurry chamber 11 and the second slurry chamber 21, which helps to make the first slurry outlet 111 and the second slurry outlet 211 fit together more tightly, so as to further prevent slurry leakage. At the same time, it also helps to further prevent the slurry in the first slurry chamber 11 and the second slurry chamber 21 from drying and causing slurry waste.

[0080] The following is a brief description of the rinsing process of the screen washing device 100 on the mesh 621 of the screen 62 according to an embodiment of this application:

[0081] When it is necessary to flush the mesh 621 of the screen 62, the first flushing component 1 and the second flushing component 2 are aligned vertically along the thickness direction of the screen and abut against both sides of the screen. At this time, the first slurry outlet 111 of the first flushing component 1 and the second slurry outlet 211 of the second flushing component 2 are connected. At this time, the pressure control mechanism 3 applies positive and negative pressure to one of the first slurry chamber 11 or the second slurry chamber 21 in a cycle, so that the slurry circulates and flushes the mesh 621, achieving a cleaning effect.

[0082] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of the automatic screen cleaning system disclosed in an embodiment of this application. Wherein, Figure 5The connection curves between the control device 8 and the power mechanism 63, the vision inspection device 9, the wiping device 7, and the pressure control mechanism 3 are used to represent the connection relationships between the control device 8 and the power mechanism 63, the vision inspection device 9, the wiping device 7, and the pressure control mechanism 3. Similarly, the connection curves between the screen 62 and the power mechanism 63 and the vision inspection device 9 are used to represent the connection relationships between the screen 62 and the power mechanism 63 and the vision inspection device 9. In a second aspect, this application also discloses an automatic screen cleaning system 200, including a screen printing device 6, a wiping device 7, and the screen washing device 100 described in the first aspect. The screen printing device 6 includes a printing table 61 and a screen 62 disposed on the printing table 61. The wiping device 7 is configured to wipe the surface of the screen 62, and the first washing component 1 and the second washing component 2 of the screen washing device 100 are configured to wash the mesh 621 of the screen 62. Based on the screen washing device 100, the automatic screen cleaning system 200 of this application is further equipped with a wiping device 7, which helps to improve the cleaning effect on the screen 62. That is, the automatic screen cleaning system 200 of this application can not only clean the inside of the mesh 621 of the screen 62, but also clean the surface of the screen 62, thereby making the cleaning of the screen 62 more comprehensive and effective, and improving the cleaning effect of the screen 62.

[0083] Normally, when a screen breakage occurs, printing is stopped immediately, and the screen 62 is raised away from the printing table 61 to facilitate screen breakage removal. For details, please refer to [link to relevant documentation]. Figure 5 The screen printing apparatus 6 also includes a power mechanism 63 connected to the screen 62, allowing the screen 62 to be movably positioned on the printing table 61 along a first direction X. Here, the first direction X is the height direction of the printing table 61. This arrangement facilitates the raising of the screen 62 relative to the printing table 61, enabling the wiping device 7 to wipe the lower surface of the screen 62 and remove dust. Furthermore, it facilitates the vertical alignment of the first flushing assembly 1 and the second flushing assembly 2 on both sides of the screen 62 along its thickness to flush the mesh openings 621 of the screen 62.

[0084] It is understood that the aforementioned power mechanism 63 can have multiple embodiments. In one example, the power mechanism 63 may include a frame with a slide rail, and a slider on the screen 62, which is slidably connected to the slide rail to achieve a sliding connection between the screen 62 and the frame, thereby enabling the screen 62 to move relative to the printing table 61 along the first direction X. This arrangement helps to improve the smoothness of the movement of the screen 62.

[0085] In another example, the power mechanism 63 can be a robotic arm, one end of which is connected to the screen 62. The robotic arm can move the screen 62 along the first direction X. This arrangement helps to improve the mobility of the screen 62.

[0086] It is understandable that the wiping device 7 can be moved by being connected to the frame via a sliding component, or it can be moved by being connected to a robotic arm. This allows the wiping device 7 to wipe the surface of the screen 62, and also enables it to move between a cleaning state and a standby state. The cleaning state refers to the state in which the wiping device 7 is wiping the surface of the screen 62, while the standby state refers to the state in which the wiping device 7 is not wiping the screen surface 62. When in the standby state, the wiping device 7 is located on one side of the screen 62, away from its surface.

[0087] In some embodiments, please refer to Figure 5 The automatic screen cleaning system 200 also includes a control device 8 and a vision inspection device 9. The control device 8 is electrically connected to the power mechanism 63, the vision inspection device 9, the wiping device 7, and the pressure control mechanism 3. The vision inspection device 9 is configured to detect the printing status of the screen 62. The control device 8 is used to determine the position of the broken grid according to the printing status of the screen 62, and to control the power mechanism 63 to drive the screen 62 to move away from the printing table 61 according to the position of the broken grid. The control device 8 is also used to wipe the surface of the screen 62 with the wiping device 7, and after the wiping device 7 has finished wiping, the control device 8 is also used to control the pressure control mechanism 3 to apply pressure to one of the first flushing assembly 1 and the second flushing assembly 2 to flush the mesh 621 of the screen 62.

[0088] Understandably, the visual inspection device 9 can detect broken grids during the screen printing process, and also detect broken grids after each wipe by the wiping device 7, and after each rinse by the first rinsing component 1 and the second rinsing component 2. This helps to understand the broken grid situation in real time and perform different cleaning operations.

[0089] By setting up the control device 8, it is possible to detect the position of the broken grid, and control the movement of the screen 62, the wiping device 7, the first flushing component 1 and the second flushing component 2, which helps to achieve fully automatic cleaning of the screen 62, thereby improving the cleaning efficiency of the screen 62 and also helping to improve the production efficiency of screen printing.

[0090] It is understood that the aforementioned visual inspection device 9 can be either AOI (Automated Optical Inspection) or EL (Electroluminescent) inspection instrument, and this embodiment does not specifically limit it.

[0091] It is understood that the aforementioned control device 8 can be a programmable logic controller (PLC), a microcontroller, or a microprocessor. A PLC can be programmed according to actual process requirements and offers high reliability and stability. A microcontroller is small, highly integrated, and lightweight. A microprocessor has fast processing speed, can be programmed with different functions, and is relatively low-cost. This embodiment does not impose specific limitations on this.

[0092] The control process of the control device 8 in this application embodiment is briefly described below:

[0093] During the printing process, the vision inspection device 9 detects whether there are broken grids on the battery cells. If a broken grid is detected, it sends a signal to the control device 8. Upon receiving the broken grid signal, the control device 8 determines the location of the broken grid and stops the printing. Simultaneously, it sends a signal to the power mechanism 63 to drive the screen 62 to move away from the printing table 61 along the first direction X. Then, the control device 8 sends a signal to the wiping device 7 to wipe the screen surface at the location of the broken grid. After each wiping, the vision inspection device 9 checks whether the broken grid still exists on the surface of the battery cell. After the wiping device 7 wipes a preset number of times (e.g., two or three times), if the vision inspection device 9 detects that a broken grid still exists on the battery cell, it sends a signal to the control device 8. The control device 8 then sends a signal to the first brushing assembly 1 and the second brushing assembly 2 to align them on both sides of the screen 62 surface along its thickness direction. At the same time, the control device 8 sends a signal to the pressure control mechanism 3 to apply pressure to one of the first brushing assembly 1 and the second brushing assembly 2 to brush the mesh 621 of the screen 62. After rinsing, the visual inspection device 9 checks again whether there are still broken grids on the battery cells. If the broken grids disappear, the cleaning process ends, and the control device 8 sends a signal to the power mechanism 63 to drive the screen 62 to move along the first direction X to return to the normal printing position. If broken grids still exist, the above rinsing and inspection process is repeated until the broken grids disappear.

[0094] Optionally, please refer to Figure 6 and Figure 7 , Figure 6 This is a side view of the wiping device disclosed in the embodiments of this application. Figure 7 This is a top view of the wiping device disclosed in the embodiments of this application. The wiping device 7 includes a wiping head 71 and a cleaning element 72. The cleaning element 72 is disposed on the wiping head 71 and is configured to abut against the screen 62 to wipe the surface of the screen 62.

[0095] The wiping device 7 also includes an unwinding mechanism 73 and a winding mechanism 74. The unwinding mechanism 73 is located on one side of the wiping head 71, and the winding mechanism 74 is located on the other side of the wiping head 71. The two ends of the cleaning component 72 are respectively wound around the unwinding mechanism 73 and the winding mechanism 74. The unwinding mechanism 73 is used to unwind the cleaning component 72, and the winding mechanism 74 is used to recycle the used cleaning component 72.

[0096] This configuration allows the cleaning component 72 to be automatically unwound and wound via the unwinding mechanism 73 and the winding mechanism 74. Compared to manually replacing the cleaning component 72 repeatedly, this improves the replacement efficiency of the cleaning component, thereby improving the cleaning efficiency of the screen 62.

[0097] It is understandable that the wiping head 71 can be made of rubber, plastic, or metal. Taking rubber as an example, rubber has moderate hardness, which helps to provide a certain amount of pressure to the cleaning component 72 so that the cleaning component 72 can wipe the surface of the screen 62 clean, without causing damage to the surface of the screen 62 due to excessive hardness.

[0098] It is understandable that the cleaning component 72 mentioned above can be a lint-free cloth, cotton cloth, or fiber cloth. Taking a lint-free cloth as an example, a lint-free cloth has a better cleaning effect, and it is also anti-static, dustproof, soft and lint-free, which helps to achieve a better cleaning effect on the surface of the screen 62.

[0099] In some embodiments, please refer to Figure 6 and Figure 7 The unwinding mechanism 73 includes an unwinding roller 731 and a first driving member 732, which drives the unwinding roller 731 to rotate. The winding mechanism 74 includes a winding roller 741 and a second driving member 742, which drives the winding roller 741 to rotate. By setting the first driving member 732 to drive the unwinding roller 731 to rotate and the second driving member 742 to drive the winding roller 741 to rotate, it is helpful to realize the unwinding and winding of the cleaning member 72 between the unwinding roller 731 and the winding roller 741. This helps the cleaning member 72 to continuously wipe the surface of the screen 62 without the need for repeated manual replacement of the cleaning member 72, thereby improving the cleaning efficiency of the screen 62.

[0100] It is understood that the first driving member 732 and the second driving member 742 can be motors, and there are various implementation methods for the first driving member 732 and the second driving member 742 to drive the unwinding roller 731 and the take-up roller 741 respectively. In one example, the motor drives the unwinding roller 731 or the take-up roller 741 to rotate through gear transmission. Using gear transmission has high transmission efficiency, constant transmission ratio, and compact structure, which helps to improve the driving efficiency and reliability of the first driving member 732 and the second driving member 742 in driving the unwinding roller 731 and the take-up roller 741 respectively, while occupying less space.

[0101] In another example, the motor drives the unwinding roller 731 or the take-up roller 741 to rotate via belt drive. Using belt drive makes the operation smoother and the structure simpler. It helps to improve the smoothness of the operation of the first drive component 732 and the second drive component 742 driving the unwinding roller 731 and the take-up roller 741 respectively, and at the same time, it makes maintenance more convenient.

[0102] Optionally, please refer to Figure 6 and Figure 7 The wiping device 7 also includes a counter 711, which is disposed on the wiping head 71. The counter 711 is configured to record the number of times the cleaning component 72 is wiped, and when the number of wipings of the cleaning component 72 reaches a preset number, it sends signals to the first drive component 732 and the second drive component 742 to cause the unwinding roller 731 to unwind the cleaning component 72 and the take-up roller 741 to take up the used cleaning component 72. This configuration allows the cleaning component 72 to be automatically replaced with a clean one after a certain number of uses, which helps to automate the cleaning process and improve cleaning efficiency. For example, after the cleaning component 72 wipes the surface of the screen 62 twice, the counter 711 sends signals to the first drive component 732 and the second drive component 742 to cause the unwinding roller 731 to unwind a new cleaning component 72 and the take-up roller 741 to take up the used cleaning component 72. The specific preset number of wipings can be set according to actual usage, and this embodiment does not impose a specific limitation on this.

[0103] The following is a brief explanation of the cleaning process of the automatic screen cleaning system 200 for screen 62:

[0104] S1. The visual inspection device identifies broken grids. Once a broken grid is detected, a signal is sent to the control device, and printing stops simultaneously.

[0105] S2. After receiving the signal, the control device determines and records the location of the broken screen, controls the power mechanism to start, and drives the screen to rise relative to the printing table in the first direction, away from the printing table.

[0106] S3. The control mechanism controls the wiping device to wipe the surface of the screen a fixed number of times. After wiping, the vision detection device identifies broken grid lines. If the broken grid lines disappear, cleaning ends, the wiping device moves to standby mode, the screen descends to the normal printing position, and printing continues. If broken grid lines are still detected, a signal is sent to the control device.

[0107] S4. After receiving the signal, the control device determines and records the location of the broken screen, and then controls the moving mechanism to start, aligning the first and second brushing components along both sides of the screen to brush the mesh. After cleaning, the first and second brushing components move to standby mode, the screen descends to the normal printing position, and printing continues.

[0108] In this way, on the one hand, the surface of the screen 62 can be automatically wiped by the wiping device 7, and on the other hand, the inside of the mesh 621 of the screen 62 can be automatically cleaned by the screen washing device 100. This helps to achieve full automation of the cleaning of the screen 62, which helps to improve the cleaning efficiency of the screen 62 compared with manual cleaning, thereby helping to improve the overall efficiency of screen printing.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A screen printing plate washing device, characterized in that, The screen washing device includes: A first rinsing assembly includes a first slurry chamber for storing slurry, and the first slurry chamber is provided with a first slurry outlet corresponding to the mesh openings of the screen. A second rinsing assembly is configured to be located on both sides of the screen along the thickness direction, the second rinsing assembly including a second slurry chamber for storing slurry, and the second slurry chamber having a second slurry outlet corresponding to the mesh opening of the screen. Along the thickness direction of the screen, the second slurry chamber and the first slurry chamber are correspondingly arranged so that the second slurry outlet communicates with the first slurry outlet. A pressure control mechanism connected to the first slurry chamber and the second slurry chamber, the pressure control mechanism being configured to apply pressure to at least one of the first slurry chamber and the second slurry chamber to cause the slurry to flow out from the first slurry outlet or the second slurry outlet to wash the mesh of the screen.

2. The screen washing device according to claim 1, characterized in that, The pressure control mechanism is configured to alternately apply positive and negative pressure to one of the first slurry chamber and the second slurry chamber.

3. The screen washing device according to claim 1, characterized in that, The first flushing assembly further includes a first filter element, which is disposed at the first slurry outlet; The second flushing assembly further includes a second filter element, which is disposed at the second slurry outlet; Both the first filter element and the second filter element have multiple filter holes, which are connected to the mesh of the screen.

4. The screen washing device according to claim 1, characterized in that, The screen washing device further includes: A slurry replenishment device is connected to the first flushing assembly and / or the second flushing assembly via a pipe. A temperature regulating mechanism is provided on the pipe, and the temperature regulating mechanism is configured to regulate the temperature of the slurry in the pipe.

5. The screen washing device according to claim 4, characterized in that, The temperature regulating mechanism includes a heating element or a cooling element, and a temperature sensor is also provided on the pipe. The temperature sensor is used to detect the temperature of the slurry in the pipe so that the temperature regulating mechanism can heat or cool the slurry.

6. The screen washing device according to any one of claims 1-5, characterized in that, The screen washing device further includes: A moving mechanism is connected to the first scouring component and the second scouring component, and the moving mechanism is configured to make the first scouring component and the second scouring component movable along the length direction and / or width direction of the screen.

7. An automatic screen cleaning system, characterized in that, The invention includes a screen printing apparatus, a wiping device, and a screen washing device as described in any one of claims 1-6. The screen printing apparatus includes a printing table and a screen disposed on the printing table. The wiping device is configured to wipe the surface of the screen. The first washing component and the second washing component of the screen washing device are configured to wash the mesh of the screen.

8. The automatic screen cleaning system according to claim 7, characterized in that, The screen printing equipment also includes a power mechanism connected to the screen, so that the screen can be movably disposed on the printing table along a first direction; The automatic screen cleaning system also includes a control device and a vision detection device, wherein the control device is electrically connected to the power mechanism, the vision detection device and the wiping device; The visual inspection device is configured to detect the printing status of the screen printing plate. The control device is used to determine the position of the broken grid according to the printing status of the screen printing plate, and to control the power mechanism to drive the screen printing plate to move away from the printing table according to the position of the broken grid. The control device is also used to control the wiping device to wipe the surface of the screen printing plate, and the control device is also used to control the pressure control mechanism to apply pressure to one of the first flushing assembly and the second flushing assembly after the wiping device has finished wiping, so as to flush the mesh of the screen printing plate. The first direction is the height direction of the printing table.

9. The automatic screen cleaning system according to claim 7, characterized in that, The wiping device includes: Wipe head; A cleaning component is disposed on the wiping head and configured to abut against the screen to wipe the surface of the screen. An unwinding mechanism is disposed on one side of the wiping head; and A winding mechanism is provided on the other side of the wiping head. The two ends of the cleaning component are respectively wound around the unwinding mechanism and the winding mechanism. The unwinding mechanism is used to unwind the cleaning component, and the winding mechanism is used to recycle the used cleaning component.

10. The automatic screen cleaning system according to claim 9, characterized in that, The unwinding mechanism includes an unwinding roller and a first driving member, the first driving member being used to drive the unwinding roller to rotate; the winding mechanism includes a winding roller and a second driving member, the second driving member being used to drive the winding roller to rotate. The wiping device further includes a counter disposed on the wiping head. The counter is configured to record the number of times the cleaning component is wiped, and when the number of times the cleaning component is wiped reaches a preset number, to send a signal to the first drive member and the second drive member, so that the unwinding roller unwinds the cleaning component and the winding roller winds up the used cleaning component.

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