A screen cleaning device and method

Abstract

This invention discloses a screen cleaning device and method, including a fixed frame and a movable frame. The fixed frame has a spray station; the movable frame has a first wiping station, a second wiping station, and a drying station arranged sequentially along its forward direction on its top. The first wiping station has a first wiping rod and a first lifting cylinder for raising and lowering the first wiping rod. A lint-free cloth is positioned above the first wiping rod and is supported by the first wiping rod for wiping. A vacuum suction groove for vacuum adsorption is formed along the length of the top of the first wiping rod and is connected to a vacuum pump. This invention achieves dry and wet separation wiping of the screen through the cooperation of the spray station, the first wiping station, the drying station, and the second wiping station, effectively cleaning the screen. The cooperation between the spray station and the lint-free cloth achieves wet wiping at the first wiping station; and the cooperation between the vacuum suction groove and the lint-free cloth achieves vacuum wiping at the first wiping station.

Description

Technical Field

[0001] This invention relates to the field of solder ball planting technology, and more particularly to a stencil cleaning device and method. Background Technology

[0002] With the continuous advancement of technology and the increasing demands on chips, solder ball mounting has emerged as a result. Solder balls are widely used due to their high purity, good stability, and controllable height and diameter.

[0003] Before solder ball placement, a paste-like substance such as flux is printed onto a stencil using a squeegee, transferring the material onto the wafer or substrate. During the printing process, material exposed through the printing holes may adhere to the stencil, and material not completely transferred to the wafer or substrate may remain in the holes, causing contamination. This contamination hinders subsequent normal printing on the wafer and substrate. Therefore, it is essential to remove any residual material from the stencil.

[0004] Current technology only cleans residual material from the screen by wiping it with lint-free paper. This cleaning method is only suitable for simple cleaning and cannot be applied to screens that are difficult to wipe clean. In addition, for screens with small mesh size and small mesh spacing, the cleaning method cannot guarantee the cleanliness of the screen. Summary of the Invention

[0005] The purpose of this invention is to provide a screen cleaning device and method to effectively clean the screen, improve the yield of the ball-planting process, and enhance the stability of the product.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] On one hand, a screen cleaning device is provided, including a fixed frame and a movable frame that moves back and forth along the fixed frame, wherein a screen is placed on the fixed frame and the movable frame is located below the screen;

[0008] The fixed frame is equipped with a spraying station, which is located above the movable frame; the top of the movable frame is arranged horizontally along its forward direction with a first wiping station, a second wiping station, and an air drying station.

[0009] The first wiping station is equipped with a first wiping rod and a first lifting cylinder for raising and lowering the first wiping rod. A dust-free cloth is provided above the first wiping rod and the dust-free cloth is supported and wiped by the first wiping rod. A vacuum groove for vacuum adsorption is opened at the top of the first wiping rod along its length direction, and the vacuum groove is connected to a vacuuming device.

[0010] As a further aspect of the invention: the first wiping rod is provided with a support rod that is detachably connected to the vacuum groove, and the top of the support rod protrudes from the top of the first wiping rod.

[0011] As a further aspect of the invention: the lifting end of the first lifting cylinder is connected to the bottom end of the first wiping rod through a first fixing block, and a plurality of first buffer springs are provided between the first fixing block and the first wiping rod.

[0012] As a further aspect of the invention: the first wiping station is further provided with an unwinding shaft and a rewinding shaft, wherein the unwinding shaft, the rewinding shaft, and the first wiping rod are distributed sequentially from top to bottom along the forward direction of the movable frame, wherein:

[0013] One end of the unwinding shaft is rotatably mounted on the movable frame and equipped with a damper for applying unwinding resistance to the unwinding shaft. The other end is detachably rotatably connected to the telescopic end of the first loading and unloading cylinder via a bearing. Both the damper and the first loading and unloading cylinder are fixed on the movable frame.

[0014] One end of the take-up shaft is rotatably mounted on the movable frame and equipped with a drive motor for driving the take-up shaft to rotate. The other end is detachably rotatably connected to the telescopic end of the second loading and unloading cylinder via a bearing. Both the drive motor and the second loading and unloading cylinder are fixed on the movable frame.

[0015] As a further aspect of the invention: the second wiping station includes a second wiping rod and a second lifting cylinder for raising and lowering the second wiping rod, wherein a rubber strip is embedded in the top of the second wiping rod along its length, and the top of the rubber strip protrudes from the top of the second wiping rod.

[0016] As a further aspect of the invention: the lifting end of the second lifting cylinder is connected to the bottom end of the second wiping rod via a second fixing block, and a plurality of second buffer springs are provided between the second fixing block and the second wiping rod.

[0017] As a further aspect of the invention: the bottom of the movable frame is provided with a motor, and the bottom of the fixed frame is provided with a track, and the movable frame moves back and forth on the track by the drive of the motor.

[0018] As a further aspect of the invention: the movable frame is divided into an upper part and a lower part, the upper part is located on top of the lower part and moves back and forth along the lower part; a drive cylinder is fixed on the top of the lower part, the telescopic end of the drive cylinder is connected to the upper part, and the motor is located at the bottom of the lower part; the upper part moves back and forth on top of the lower part by being driven by the drive cylinder.

[0019] On the other hand, a method for cleaning a screen using a screen cleaning device is provided, comprising the following steps:

[0020] S1. The movable frame moves along the fixed frame to directly below the spray station, and the spray station sprays the lint-free cloth placed above the first wiping bar.

[0021] S2. After the spraying is completed, the spraying station stops operating and the movable frame is reset;

[0022] S3. The movable frame moves back and forth along the fixed frame, while the first wiping station supports the dust-free cloth to wet wipe the bottom of the screen.

[0023] S4. After the wet wiping is completed, the first wiping station and the movable frame are reset in sequence;

[0024] S5. The movable frame moves back and forth along the fixed frame, while the drying station blows air onto the bottom of the mesh plate, and the second wiping station wipes the bottom of the mesh plate.

[0025] S6. After the drying process is completed, the air-drying station stops operating, and the first wiping station and the movable frame are reset in sequence.

[0026] As a further aspect of the invention: In S3, the first wiping station supports the cleanroom cloth to simultaneously perform wet wiping and vacuum adsorption on the bottom of the mesh plate.

[0027] The beneficial effects of this invention are as follows: through the cooperation between the spray station, the first wiping station, the air drying station, and the second wiping station, the dry and wet wiping of the screen is achieved, effectively cleaning the screen, improving the yield of the ball-planting process, and enhancing the stability of the product; through the cooperation between the spray station and the cleanroom cloth, the wet wiping of the first wiping station is achieved; and through the cooperation between the vacuum tank and the cleanroom cloth, the vacuum wiping of the first wiping station is achieved. Attached Figure Description

[0028] The invention will now be further described with reference to the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the present invention;

[0030] Figure 2 This is a partial structural diagram (a) of the upper part of the movable frame in this invention;

[0031] Figure 3 This is a partial structural diagram (II) of the upper part of the movable frame in this invention;

[0032] Figure 4This is a partial schematic diagram (a) of the first wiping station in this invention;

[0033] Figure 5 This is a partial schematic diagram (a) of the first wiping station in this invention;

[0034] Figure 6 This is a schematic diagram of the first wiping rod in this invention;

[0035] Figure 7 This is a schematic diagram of the air-drying station in this invention;

[0036] Figure 8 This is a schematic diagram (a) of the second wiping station in this invention;

[0037] Figure 9 This is a schematic diagram (II) of the second wiping station in this invention;

[0038] The reference numerals in the attached figures are:

[0039] 10. Fixed frame; 11. Spraying station;

[0040] 20. Movable frame; 21. First wiping station; 211. First wiping rod; 212. Vacuum tank; 213. First lifting cylinder; 214. Support rod; 215. First fixing block; 216. First buffer spring; 217. Unwinding shaft; 2171. Damper; 2172. First loading / unloading cylinder; 218. Rewinding shaft; 2181. Drive motor; 2182. Second loading / unloading cylinder; 219. First limit bolt; 22. Second wiping station; 221. Second wiping rod; 222. Second lifting cylinder; 223. Rubber strip; 224. Second fixing block; 225. Second buffer spring; 226. Second limit bolt; 23. Air drying station; 231. Air pipe; 24. Motor; 25. Drive cylinder;

[0041] 30. Mesh plate. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1-3As shown, the screen cleaning device of the present invention includes a fixed frame 10 and a movable frame 20 that moves back and forth along the fixed frame 10. A screen 30 is placed on the fixed frame 10, and the movable frame 20 is located below the screen 30. A spraying station 11 is provided on the fixed frame 10, and the spraying station 11 is located above the movable frame 20; a first wiping station 21, a second wiping station 22, and a drying station 23 are sequentially arranged laterally along the moving direction on the top of the movable frame 20.

[0044] Please see Figure 1 As shown, the bottom of the movable frame 20 is equipped with a motor 24, and the bottom of the fixed frame 10 is equipped with a track. The movable frame 20 moves back and forth on the track by the drive of the motor 24.

[0045] Specifically, the movable frame 20 is divided into an upper part and a lower part, with the upper part positioned on top of the lower part and moving back and forth along it. A drive cylinder 25 is fixed to the top of the lower part, and the telescopic end of the drive cylinder 25 is connected to the upper part. A motor 24 is located at the bottom of the lower part, and the upper part moves back and forth on top of the lower part via the drive cylinder 25. Specifically, the motor 24 drives the movable frame 20 to move directly below the mesh plate 30, and the drive cylinder 25 drives the upper part of the movable frame 20 to perform a back-and-forth wiping motion.

[0046] Please see Figure 1 As shown, the spray station 11 is used to spray the first wiping station 21. The spray station 11 is equipped with a spraying device, which sprays downwards to spray the first wiping station 21. The spray station 11 is located behind the stencil 30 and is set at the starting end of the fixed frame 10. The liquid sprayed by the spraying device is a cleaning fluid used to dissolve residual flux on the stencil 30. The cleaning fluid includes, but is not limited to, alcohol and isopropanol.

[0047] Please see Figures 2-6 As shown, the first wiping station 21 is used for wet wiping and vacuum adsorption of the stencil 30. The first wiping station 21 is equipped with a first wiping rod 211 and a first lifting cylinder 213 for raising and lowering the first wiping rod 211. A lint-free cloth is positioned above the first wiping rod 211 and is supported for wiping via the first wiping rod 211. A vacuum extraction groove 212 for vacuum adsorption is formed along the length of the top of the first wiping rod 211 and is connected to a vacuuming device. Specifically, the air outlet of the vacuum extraction groove 212 is located at the bottom of the first wiping rod 211, and the air outlet of the vacuum extraction groove 212 is connected to the vacuuming device via an air pipe connector. When there is residual flux material that is difficult to dissolve on the stencil 30 and / or the mesh size and mesh spacing of the stencil 30 are small, the vacuum extraction groove 212 assists the lint-free cloth in wiping the stencil 30 through vacuum adsorption.

[0048] Furthermore, the first wiping rod 211 is provided with a support rod 214 that is detachably connected to the vacuum tank 212, and the top of the support rod 214 protrudes from the top of the first wiping rod 211.

[0049] When the first wiping station 21 is used for wet wiping of the mesh plate 30, the support rod 214 is placed in the vacuum tank 212; the spraying station 11 sprays the clean cloth supported on the top of the support rod 214; the first wiping rod 211 is raised and lowered by the first lifting cylinder 213 so that the clean cloth placed on the top of the support rod 214 is in close contact with the bottom of the mesh plate 30 for wet wiping.

[0050] When the first wiping station 21 is used for wet wiping and vacuum adsorption, the support rod 214 is removed from the vacuum tank 212; the spray station 11 sprays the cleanroom cloth supported on the top of the first wiping rod 211; the first wiping rod 211 is raised and lowered by the first lifting cylinder 213 so that the cleanroom cloth set on the top of the first wiping rod 211 is in close contact with the bottom of the mesh plate 30 for wet wiping, and at the same time the vacuum equipment vacuums the vacuum tank 212, that is, during the wet wiping process, the vacuum tank 212 vacuum adsorbs foreign objects and dirt attached to the cleanroom cloth and mesh plate 30 through the cleanroom cloth 2.

[0051] Furthermore, the first wiping station 21 is also equipped with an unwinding shaft 217 and a rewinding shaft 218, which are distributed sequentially from top to bottom along the forward direction of the movable frame 20. Unused cleanroom cloth rolls are unwound from the unwinding shaft 217, and the unwound cleanroom cloth is supported by the top of the first wiping shaft 211. After use, the cleanroom cloth supported by the top of the first wiping shaft 211 is wound onto the rewinding shaft 218.

[0052] Specifically, one end of the unwinding shaft 217 is rotatably mounted on the movable frame 20 and equipped with a damper 2171 for applying unwinding resistance to the unwinding shaft 217. The other end is detachably rotatably connected to the telescopic end of the first loading / unloading cylinder 2172 via a bearing. Both the damper 2171 and the first loading / unloading cylinder 2172 are fixed on the movable frame 20. One end of the take-up shaft 218 is rotatably mounted on the movable frame 20 and equipped with a drive motor 2181 for driving the take-up shaft 218 to rotate. The other end is detachably rotatably connected to the telescopic end of the second loading / unloading cylinder 2182 via a bearing. Both the drive motor 2181 and the second loading / unloading cylinder 2182 are fixed on the movable frame 20.

[0053] After the first wiping station 21 completes wiping, the drive motor 2181 drives the take-up shaft 218 to rotate. The take-up shaft 218 rewinds the used cleanroom cloth, indirectly driving the unwind shaft 217 to unwind the unused cleanroom cloth until the unused cleanroom cloth has completely flowed to the top of the first wiping bar 211. During the unwinding process, the damper 2171 adjusts the rotation of the unwind shaft 217, thereby keeping the cleanroom cloth supported at the top of the first wiping bar 211 in a taut state for easy wiping.

[0054] When the cleanroom cloth roll needs to be replaced at the first wiping station 21, the quick disassembly and installation of the cleanroom cloth roll are achieved through the extension and retraction of the first loading / unloading cylinder 2172 and the second loading / unloading cylinder 2182. Specifically, the extension and retraction end of the first loading / unloading cylinder 2172 retracts, that is, the unwinding shaft 217 separates from the first loading / unloading cylinder 2172; the operator replaces the cleanroom cloth roll on the unwinding shaft 217 by placing the new cleanroom cloth roll onto the unwinding shaft 217; after the replacement is completed, the extension and retraction end of the first loading / unloading cylinder 2172 extends, so that both ends of the unwinding shaft 217 are fixed by the movable frame 20 and the first loading / unloading cylinder 2172. The inner cavity at the end of the unwinding shaft 217 is rotatably connected to the extension and retraction end of the first loading / unloading cylinder 2172 through a bearing, so that the unwinding shaft 217 can rotate normally after being fixed by the first loading / unloading cylinder 2172. The principle for replacing the cleanroom cloth roll on the take-up shaft 218 is the same.

[0055] Please see Figure 5 As shown, during the wiping process of the screen plate at the first wiping station 21, in order to effectively protect the screen plate, the lifting end of the first lifting cylinder 213 is connected to the bottom end of the first wiping rod 211 through the first fixing block 215, and a plurality of first buffer springs 216 are provided between the first fixing block 215 and the first wiping rod 211. During the process of the first wiping rod 211 supporting the lint-free cloth to be in close contact with the bottom of the screen plate 30, the first buffer springs 216 provide elastic buffering between the first wiping rod 211 and the screen plate.

[0056] Specifically, the two ends of the first buffer spring 216 are connected to the first fixed block 215 and the fixed base of the first wiping rod 211, respectively. A plurality of first limiting bolts 219 are also provided between the first fixed block 215 and the first wiping rod 211. The head of the first limiting bolt 219 is located below the first fixed block 215, and its rod passes through the first fixed block 215 and is threadedly connected to the fixed base of the first wiping rod 211. When the first lifting cylinder 213 drives the first fixed block 215 to move upward, the first fixed block 215 moves upward along the rod of the first limiting bolt 219, during which time the first buffer spring 216 elastically expands and contracts.

[0057] Please see Figure 7As shown, the air drying station 23 is used to air dry the mesh plate 30 after it has been wet-rubbed. The air drying station 23 is provided with an air pipe 231, and the top of the air pipe 231 has several air outlets at equal intervals along its length.

[0058] Specifically, both ends of the air pipe 231 are connected to the blower mechanism via air pipe connectors. The blower mechanism blows air into the air pipe 231, causing the air outlet at the top of the air pipe 231 to blow air upwards onto the mesh plate, thereby drying the cleaning fluid adhering to the mesh plate 30, so that the second wiping station 22 can perform subsequent dry wiping.

[0059] In some of these embodiments, the blower mechanism is supplied with nitrogen, using an external gas source.

[0060] Please see Figures 8-9 As shown, the second wiping station 22 is used for dry wiping the mesh plate 30. The second wiping station 22 includes a second wiping rod 221 and a second lifting cylinder 222 for raising and lowering the second wiping rod 221. A rubber strip 223 is embedded in the top of the second wiping rod 221 along its length, and the top of the rubber strip 223 protrudes from the top of the second wiping rod 221. The second wiping rod 221 is raised and lowered by the second lifting cylinder 222 so that the top of the rubber strip 223 is in close contact with the bottom of the mesh plate 30 for dry wiping.

[0061] Please see Figure 8 As shown, in order to effectively protect the mesh plate, the lifting end of the second lifting cylinder 222 is connected to the bottom end of the second wiping rod 221 through the second fixing block 224, and a number of second buffer springs 225 are provided between the second fixing block 224 and the second wiping rod 221.

[0062] Specifically, the two ends of the second buffer spring 225 are connected to the second fixing block 224 and the second wiping rod 221, respectively. A plurality of second limiting bolts 226 are also provided between the second fixing block 224 and the second wiping rod 221. The heads of the second limiting bolts 226 are located below the second fixing block 224, and their rods pass through the second fixing block 224 and are threadedly connected to the second wiping rod 221.

[0063] The screen cleaning device achieves dry and wet separation wiping of the screen 30 through the cooperation of the spray station 11, the first wiping station 21, the air drying station 23, and the second wiping station 22, effectively cleaning the screen 30, improving the yield of the ball-planting process and the stability of the product; the spray station 11 and the first wiping rod 211 cooperate with the lint-free cloth to achieve wet wiping of the screen 30; and the vacuum tank 212 cooperates with the lint-free cloth to achieve vacuum adsorption of residual materials on the screen 30.

[0064] The screen cleaning method for the screen cleaning device includes the following steps:

[0065] S1. The movable frame 20 moves along the fixed frame 10 to directly below the spray station 11, and the spray station 11 sprays the clean cloth set above the first wiping bar 211.

[0066] S2. After the spraying is completed, the spraying station 11 stops operating and the movable frame 20 is reset.

[0067] S3. The movable frame 20 moves back and forth along the fixed frame 10, while the first wiping station 21 supports the dust-free cloth to wet wipe the bottom of the mesh plate 30.

[0068] S4. After the wet wiping is completed, the first wiping station 21 and the movable frame 20 are reset in sequence;

[0069] S5. The movable frame 20 moves back and forth along the fixed frame 10, while the air drying station 23 blows air onto the bottom of the screen plate 30, and the second wiping station 22 wipes the bottom of the screen plate 30.

[0070] S6. After the dry wiping is completed, the air drying station 23 stops operating, and the first wiping station 21 and the movable frame 20 are reset in sequence.

[0071] In S3, the upper part of the movable frame 20 moves forward to directly below the screen plate 30 via the drive cylinder 25; the first wiping rod 211 moves upward via the first lifting cylinder 213 until the clean cloth is in close contact with the bottom of the screen plate 30; the movable frame 20 moves back and forth along the fixed frame 10 via the drive motor 24, while the first wiping station 21 supports the clean cloth to wet wipe the bottom of the screen plate 30.

[0072] In S5, the upper part of the movable frame 20 moves forward to directly below the screen plate 30 via the drive cylinder 25; the second wiping rod 221 moves upward via the second lifting cylinder 222 until the rubber strip 223 is in close contact with the bottom of the screen plate 30, and at the same time the drying station 23 blows air onto the screen plate 30; the movable frame 20 moves back and forth along the fixed frame 10 via the drive motor 24, so that the drying station 23 dries the screen plate 30, and the second wiping station 22 supports the rubber strip 223 to dry wipe the bottom of the screen plate 30.

[0073] Furthermore, when there are undissolved soldering materials remaining on the stencil 30, making it difficult to clean, the first wiping station 21 needs to simultaneously perform wet wiping and vacuum wiping on the stencil 30. That is, in S3, the first wiping station 21 supports a lint-free cloth to simultaneously perform wet wiping and vacuum adsorption on the bottom of the stencil 30.

[0074] Specifically, the first wiping rod 211 is raised and lowered by the first lifting cylinder 213 so that the lint-free cloth set at the top of the first wiping rod 211 is in close contact with the bottom of the mesh plate 30 for wet wiping. At the same time, the vacuum equipment evacuates the vacuum tank 212, that is, during the wet wiping process, the vacuum tank 212 uses the lint-free cloth 2 to vacuum adsorb foreign objects and dirt attached to the lint-free cloth and mesh plate 30.

[0075] In some of these embodiments, the vacuuming device is a vacuum generator.

[0076] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A screen cleaning device, characterized in that, It includes a fixed frame (10) and a movable frame (20) that moves back and forth along the fixed frame (10). A mesh plate (30) is placed on the fixed frame (10), and the movable frame (20) is located below the mesh plate (30). The fixed frame (10) is provided with a spray station (11), and the spray station (11) is located above the movable frame (20); the top of the movable frame (20) is provided with a first wiping station (21), a second wiping station (22) and an air drying station (23) in sequence along its forward direction. The first wiping station (21) is provided with a first wiping rod (211) and a first lifting cylinder (213) for lifting the first wiping rod (211). A dust-free cloth is provided above the first wiping rod (211) and the dust-free cloth is supported and wiped by the first wiping rod (211). A vacuum groove (212) for vacuum adsorption is opened at the top of the first wiping rod (211) along its length direction. The vacuum groove (212) is connected to a vacuuming device. The first wiping station (21) is also provided with an unwinding shaft (217) and a rewinding shaft (218). The unwinding shaft (217), the rewinding shaft (218), and the first wiping bar (211) are distributed from top to bottom along the forward direction of the movable frame (20), wherein: One end of the unwinding shaft (217) is rotatably mounted on the movable frame (20) and equipped with a damper (2171) for applying unwinding resistance to the unwinding shaft (217). The other end is detachably rotatably connected to the telescopic end of the first loading and unloading cylinder (2172) via a bearing. Both the damper (2171) and the first loading and unloading cylinder (2172) are fixed on the movable frame (20). One end of the take-up shaft (218) is rotatably mounted on the movable frame (20) and equipped with a drive motor (2181) for driving the take-up shaft (218) to rotate. The other end is detachably rotatably connected to the telescopic end of the second loading and unloading cylinder (2182) through a bearing. Both the drive motor (2181) and the second loading and unloading cylinder (2182) are fixed on the movable frame (20).

2. The mesh cleaning device according to claim 1, characterized in that, The first wiping rod (211) is provided with a support rod (214) that is detachably connected to the vacuum groove (212), and the top of the support rod (214) protrudes from the top of the first wiping rod (211).

3. The screen cleaning device according to claim 1, characterized in that, The lifting end of the first lifting cylinder (213) is connected to the bottom end of the first wiping rod (211) through the first fixing block (215), and a plurality of first buffer springs (216) are provided between the first fixing block (215) and the first wiping rod (211).

4. The mesh cleaning device according to claim 1, characterized in that, The second wiping station (22) includes a second wiping rod (221) and a second lifting cylinder (222) for lifting the second wiping rod (221). A rubber strip (223) is embedded on the top of the second wiping rod (221) along its length direction, and the top of the rubber strip (223) protrudes from the top of the second wiping rod (221).

5. The mesh cleaning device according to claim 4, characterized in that, The lifting end of the second lifting cylinder (222) is connected to the bottom end of the second wiping rod (221) through the second fixing block (224), and a plurality of second buffer springs (225) are provided between the second fixing block (224) and the second wiping rod (221).

6. The screen cleaning device according to claim 1, characterized in that, The bottom of the movable frame (20) is provided with a motor (24), and the bottom of the fixed frame (10) is provided with a track. The movable frame (20) moves back and forth on the track by the drive of the motor (24).

7. The mesh cleaning device according to claim 6, characterized in that, The movable frame (20) is divided into an upper part and a lower part. The upper part is located on top of the lower part and moves back and forth along the lower part. A drive cylinder (25) is fixed on the top of the lower part. The telescopic end of the drive cylinder (25) is connected to the upper part. The motor (24) is located at the bottom of the lower part. The upper part moves back and forth on top of the lower part by the drive of the drive cylinder (25).

8. The screen cleaning method of the screen cleaning device according to any one of claims 1 to 7, characterized in that, Includes the following steps: S1. The movable frame (20) moves along the fixed frame (10) to directly below the spray station (11), and the spray station (11) sprays the dust-free cloth set above the first wiping bar (211); S2. After the spraying is completed, the spraying station (11) stops operating and the movable frame (20) is reset; S3. The movable frame (20) moves back and forth along the fixed frame (10), while the first wiping station (21) supports the dust-free cloth to wet wipe the bottom of the mesh plate (30); S4. After the wet wiping is completed, the first wiping station (21) and the movable frame (20) are reset in sequence; S5. The movable frame (20) moves back and forth along the fixed frame (10), while the air drying station (23) blows air onto the bottom of the mesh plate (30), and the second wiping station (22) wiping the bottom of the mesh plate (30). S6. After the dry wiping is completed, the air drying station (23) stops operating, and the first wiping station (21) and the movable frame (20) are reset in sequence.

9. The screen cleaning method of the screen cleaning device according to claim 8, characterized in that: In S3, the first wiping station (21) supports the dust-free cloth to simultaneously perform wet wiping and vacuum adsorption on the bottom of the mesh plate (30).

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