Continuous electrostatic spraying base film edge powder layer removing device and using method

Abstract

The invention relates to a continuous electrostatic spraying base film edge powder layer removing device and a using method, the device comprises a spraying base film, a spraying powder layer is sprayed on the spraying base film, a lining plate is fixedly arranged on the face, away from the spraying powder layer, of the spraying base film, and the lining plate is supported through a lining plate lifting mechanism and is placed on the ground; the two edge powder layer scraping devices are symmetrically arranged on the two sides of the spraying base film at the adjustable angle and the adjustable interval correspondingly, the two edge powder layer scraping devices make contact with the spraying face of the spraying base film correspondingly, and the edge powder layer scraping devices are used for scraping spraying powder layers on the edges of the two sides of the spraying base film; the vertical pressing force adjusting equipment is arranged in the edge powder layer scraping device and is used for detecting the vertical pressure between the edge powder layer scraping device and the spraying base film and adjusting the pressure; and the powder recovery device is arranged below the edge powder layer scraping device and is used for receiving and recovering the crushed powder scraped from the spraying base film by the edge powder layer scraping device.

Description

Technical Field

[0001] This invention belongs to the field of dry electrode technology for ion batteries, and relates to a continuous powder removal device for the edge of the electrostatic spraying dry electrode base film, specifically a continuous electrostatic spraying base film edge powder removal device and its usage method. Background Technology

[0002] The production efficiency and cost of secondary ion batteries are directly related to national energy security and the efficiency of green economic development. Current electrostatic powder coating processes cover the entire surface of the grounded electrode. However, the concentrated distribution of the electrostatic field at the edge of the grounding base film often results in inconsistent coating thickness between the edge and the center. This leads to uneven thickness or density at the edges after subsequent roller compaction or thermal melting due to varying loads. Furthermore, the powder may not adhere properly to the rollers of the roller press due to insufficient compaction, damaging the current powder coverage and reducing subsequent roller compaction accuracy and roller lifespan.

[0003] Furthermore, traditional powder cleaning methods (such as sweeping or washing) can only clean large areas of hard-coated surfaces and cannot precisely clean flexible substrates, especially micron-level ultrathin current collectors in electrode fabrication. If a certain amount of bare base film needs to be left at the edge of the powder layer for subsequent processing, the above methods cannot accurately remove that specific area.

[0004] Therefore, there is an urgent need to develop a method and apparatus for dust removal or powder layer edge modification with controllable precision in order to optimize the local powder layer removal process of flexible base film. Summary of the Invention

[0005] To address the aforementioned problems, the first objective of this invention is to provide a continuous electrostatic spraying base film edge powder removal device. This device uses a soft scraper belt to scrape the powder at the edge of the sprayed base film to a recycling device at a set width. By removing the powder at the edge, the powder on the base film surface is cut to a fixed width, eliminating the problem of uneven powder thickness during subsequent processing, improving the uniformity and controllability of the film thickness, and leaving empty edge base film for subsequent machining.

[0006] A second objective of this invention is to provide a method for using a continuous electrostatic spraying base film edge powder layer removal device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: The continuous electrostatic spraying base film edge powder layer removal device of the present invention includes: A base film is sprayed with a powder coating. A liner is fixedly installed on the side of the base film facing away from the powder coating. The liner is supported and placed on the ground by a liner lifting mechanism. An edge powder layer scraping device is provided. Two edge powder layer scraping devices are symmetrically arranged on both sides of the sprayed base film with adjustable angle and adjustable spacing. The two edge powder layer scraping devices are in contact with the sprayed surface of the sprayed base film. The edge powder layer scraping devices are used to scrape off the sprayed powder layer on both sides of the sprayed base film to form a bare base film. A vertical pressure adjustment device is installed inside the edge powder layer scraping device to detect and adjust the vertical pressure between the edge powder layer scraping device and the sprayed base film. A powder recovery device is located below the edge powder layer scraping device and is used to receive and recover the broken powder scraped off from the sprayed base film by the edge powder layer scraping device.

[0008] Preferably, the continuous electrostatic spraying base film edge powder layer removal device includes a vertical pressing pressure adjustment device comprising: a detection frame with protrusions and a square hole, a vertical pressure detector, and a driven wheel axle support rod; one end of the driven wheel axle support rod is a free end, and the other end is connected to the first end of the vertical pressure detector; the vertical pressure detector is disposed in the square hole of the detection frame, and its second end abuts against the top of the detection frame.

[0009] The continuous electrostatic spraying base film edge powder layer removal device, preferably, includes the following components: A support frame is used to support the edge powder scraping device. It can be raised, lowered, and rotated by the adjustment of the rotation and lifting support mechanism. The support frame is provided with a cavity translation track. A cavity translation mechanism is mounted on the support frame and slides on the cavity translation track under the drive of a translation drive motor; A drive motor is positioned above the support frame; There are two internal support plates, which are respectively set on one side and the opposite side of the drive motor. The internal support plates are provided with horizontal sliding support frames. An active support wheel and an active support wheel rotation shaft, one end of which is connected to the drive motor, and the other end of which passes through the active support wheel and is connected to the internal support plate via a bearing; A driven support wheel and a driven support wheel rotation shaft are connected. The driven support wheel rotation shaft passes through the driven support wheel, with its first end extending into a square hole in the detection frame on the first side and connecting to the free end of the driven wheel shaft support rod on the corresponding side; its second end extends into a square hole in the detection frame on the second side and connects to the free end of the driven wheel shaft support rod on the corresponding side; the driven support wheel is positioned corresponding to the edge of the powder layer to be scraped off on the sprayed base film. There are two tension rods. One end of each tension rod is sleeved on the rotating shaft of the active support wheel, and the other end is connected to the protrusion of the detection frame through a bearing. The protrusion of the detection frame extends into the corresponding sliding support frame and can slide horizontally within the sliding support frame. The soft scraper belt is sleeved outside the active support wheel and the driven support wheel. When the drive motor drives the active support wheel to rotate, it drives the driven support wheel to rotate, and in turn drives the soft scraper belt to rotate. The outer shell of the cavity covers the entire structure formed by the active support wheel, the driven support wheel, and the soft scraper belt, and is connected to the drive motor.

[0010] The continuous electrostatic spraying base film edge powder layer removal device, preferably, includes a soft scraper belt comprising a scraper carrier belt and a soft scraper. Several soft scrapers are spaced apart and arranged at a set angle to the rolling direction of the scraper carrier belt on the outer ring of the scraper carrier belt, so that when the scraper carrier rotates, the soft scrapers scrape off the sprayed powder layer at the edge of the sprayed base film that is in contact with them. The inner ring of the scraper carrier belt has a trapezoidal tooth structure perpendicular to its direction of movement. The surfaces of the active support wheel and the driven support wheel are provided with trapezoidal grooves that match the trapezoidal tooth structure, so as to prevent the scraper carrier belt from slipping during operation due to powder entering the gap between it and the active support wheel or the driven support wheel.

[0011] Preferably, in the continuous electrostatic spraying base film edge powder layer removal device, the tension bar is provided with a coaxial tension adjuster with a display reading; A reference line laser emitting device is provided near the sprayed base film in the outer shell of the cavity. The reference line laser emitting device is configured to mark the boundary of the contact between the doctor blade and the base film on the powder layer so that the reference line angle is always parallel to the direction of the tape travel. The cavity shell is equipped with a central control console and a parameter display PLC. The central control console and parameter display PLC are used to control the height of the support frame, the angle between the support frame and the conveyor belt direction, the position of the cavity translation mechanism, the vertical pressure detector, the reference line laser emitting device, and the drive motor.

[0012] Preferably, the continuous electrostatic spraying base film edge powder layer removal device further includes a scraper cleaning system for removing residual powder on the soft scraper belt.

[0013] The continuous electrostatic spraying base film edge powder layer removal device, preferably, the scraper cleaning system includes: a first elastic fiber cleaning wheel, a cleaning drive motor, a cleaning gear set, a first electrostatic eliminating ion air gun array, and a cleaning system support component; The cleaning gear set includes a first bevel gear and a second bevel gear; The first elastic fiber cleaning wheel is provided with a second bevel gear at its top; The output shaft of the sweeping drive motor is connected to the first bevel gear to drive the first bevel gear to rotate; The first bevel gear meshes with the second bevel gear at the top of the first elastic fiber sweeping wheel; so that when the sweeping drive motor drives the first bevel gear to rotate, it drives the second bevel gear meshing with it to rotate, so that the first elastic fiber sweeping wheel rotates perpendicular to the running direction of the soft scraper belt, thereby achieving tangential sweeping; the first elastic fiber sweeping wheel is in contact with the soft scraper belt; One end of the cleaning system support is connected to the outer shell of the cavity, and the other end is rotatably connected to the first elastic fiber cleaning wheel. The first electrostatic eliminator ion gun array is positioned below the soft scraper belt and is used to blow out ion air to assist in cleaning the surface of the soft scraper belt and neutralizing the charged powder adsorbed in the soft scraper belt.

[0014] The continuous electrostatic spraying base film edge powder layer removal device, preferably, the scraper cleaning system includes: at least one second elastic fiber cleaning wheel, a cleaning drive wheel, a transmission belt, a cleaning driven wheel, a cleaning system fixing component, a second electrostatic eliminating ion air gun array, and a connecting rod; The sweeping drive wheel is mounted on the rotating shaft of the active support wheel of the edge dust removal device and rotates synchronously with the active support wheel; the sweeping driven wheel is mounted on the rotating shaft of the second elastic fiber sweeping wheel and rotates synchronously with the second elastic fiber sweeping wheel; the transmission belt is sleeved on the outside of the sweeping drive wheel and the sweeping driven wheel; the second elastic fiber sweeping wheel is in contact with the soft scraper belt; When the drive motor drives the active support wheel to rotate, the sweeping drive wheel rotates synchronously with it and drives the sweeping driven wheel to rotate under the action of the transmission belt, so as to synchronously drive the second elastic fiber sweeping wheel to rotate, thereby sweeping the residual powder on the soft scraper belt. The cleaning system fixing component is fixed to the inner wall of the cavity shell, and the rotation shaft of the cleaning drive wheel and the rotation shaft of the cleaning driven wheel are respectively rotatably connected to the cleaning system fixing component; One end of the connecting rod is rotatably connected to the rotating shaft of the second elastic fiber cleaning wheel, and the other end is rotatably connected to the rotating shaft of the active support wheel; The second electrostatic eliminator ion gun array is positioned below the soft scraper belt and is used to blow out ion air to assist in cleaning the surface of the soft scraper belt and neutralizing the charged powder adsorbed in the soft scraper belt.

[0015] Preferably, in the continuous electrostatic spraying base film edge powder layer removal device, there are multiple second elastic fiber cleaning wheels and multiple cleaning driven wheels; The driven sweeping wheel is mounted on the rotating shaft of the corresponding second elastic fiber sweeping wheel; Each driven sweeping wheel is connected to the drive sweeping wheel via the transmission belt, and each of the second elastic fiber sweeping wheels is in contact with the soft scraper belt; When the sweeping drive wheel rotates, it drives each sweeping driven wheel to rotate, thereby driving each second elastic fiber sweeping wheel to rotate synchronously, so as to achieve multi-layer sweeping of the soft scraper belt.

[0016] Preferably, the inner ring of the transmission belt and the outer rings of the cleaning drive wheel and the cleaning driven wheel are provided with anti-slip toothed structures in the continuous electrostatic spraying base film edge powder layer removal device, so as to prevent slippage between the cleaning drive wheel and the transmission belt and between the cleaning driven wheel and the transmission belt during movement.

[0017] Preferably, the continuous electrostatic spraying base film edge powder layer removal device further includes: a rotation and lifting support mechanism, which is disposed below the support frame and fixed to the support frame, for adjusting the height and angle of the edge powder layer scraping device; the rotation and lifting support mechanism is electrically or signal-connected to the main control panel and parameter display PLC.

[0018] The continuous electrostatic spraying base film edge powder layer removal device, preferably, includes a powder recovery device comprising a powder recovery hood, a recovery dust collection device, a powder recovery pipeline, and a vibration module; The two powder recovery hoods are respectively located below the edge powder scraping device on both sides; The two powder recovery hoods are respectively connected to the recovery dust collection device through powder recovery pipelines; The powder recovery hood is equipped with a vibration module on its outer side. The vibration module is used to vibrate the powder recovery hood at an adjustable frequency to facilitate powder recovery. The vacuuming device is electrically or signal-connected to the central control panel and parameter display PLC to control the vacuuming negative pressure wind speed via the central control panel and parameter display PLC.

[0019] Preferably, the continuous electrostatic spraying base film edge powder layer removal device includes a central control console and parameter display PLC comprising: The positioning module is used to mark the position of the soft scraper belt on the powder layer surface using a laser. The angle control is linked to the angle of the rotating platform. The reference line angle is always parallel to the belt direction. It positions the spatial position of the soft scraper belt and the driven support wheel, and provides feedback control for the rotation and lifting mechanism, adjusting the horizontal position, angle and height of the driven support wheel and the sprayed base film. The powder scraping module is used to detect the tension bar and vertical pressing pressure values ​​during the horizontal scraping process of the rolling soft scraper belt contacting the powder on the sprayed base film, and to adjust the rotation speed of the soft scraper belt. The scraper cleaning module is used to cut and sweep or vertically rotate to sweep away residual powder on the soft scraper, and controls the start and stop of the scraper cleaning system and the cleaning speed. The dust collection and recovery module is used to eliminate residual static charge in electrostatic spraying powder and to separate and recover the powder, as well as to control the start and stop of the powder recovery device and its vibration module and the dust collection power.

[0020] The present invention also provides a method for using a continuous electrostatic spraying base film edge powder layer removal device, comprising the following steps: The material of the soft scraper belt is selected according to the material of the base film and the type of powder layer. After replacing the soft scraper belt with a suitable one, the tension bar is set to the set tension. The tension setting is determined by the hardness and elasticity of the soft scraper belt. A soft scraper belt with high hardness and poor elasticity requires high tension to make it fit the active support wheel and the driven support wheel, while a soft scraper belt with low hardness and high elasticity needs to reduce the tension to avoid shrinkage or breakage of the soft scraper belt. The edge powder removal device is raised as a whole, so that the lower edge of the soft scraper belt is 5-10mm above the horizontal plane of the spray base film. The two edge powder removal devices are simultaneously turned to the opposite direction of the spray base film operation, so that the scraping direction of the two edge powder removal devices is symmetrical about the left and right along the central axis of the spray base film and at a set angle. The unsprayed part of the spray base film is passed through the lower edge of the soft scraper belt and the liner at the bottom of the scraping area. The reference line laser emission device is turned on to mark the scraping edge on the spray base film. The translation drive motor drives the cavity translation mechanism to move back and forth to reach the set scraping edge distance. The linkage base film unwinding and rewinding equipment reads the speed of the sprayed base film conveyor belt. The main control panel and parameter display PLC automatically calculate the required operating speed of the soft scraper belt. At the same time as the sprayed base film begins to move, the drive motor is started to drive the soft scraper belt to rotate. The dust collection mode of the powder recovery device is activated, and then the edge powder layer scraping device is lowered so that the lower edge of the soft scraper belt contacts the sprayed base film. The soft scraper belt is pressed down so that the vertical pressing pressure adjustment device reaches the set pressure. The edge powder layer scraping device scrapes off the sprayed powder layer at the edge of the sprayed base film at a set distance.

[0021] The present invention has the following advantages due to the adoption of the above technical solutions: (1) The present invention can replace the soft scraper belt with different scraper materials according to the base film conveyor speed and preset spraying parameters. The soft prismatic scraper with a certain angle to the conveyor direction is used to separate the sprayed powder layer from the sprayed base film at the edge of the traveling sprayed base film. During the edge cleaning process, the sprayed base film is subjected to balanced and continuous force, and the thickness distribution of the powder layer after edge cleaning is more uniform, which is conducive to obtaining a film material with more uniform thickness in the subsequent hot melt film forming or roll forming process. After the separated sprayed base film is exposed, it can be used to support the film material in the subsequent processing. The scraped powder is recycled into the negative pressure dust collection hood and collected into the dust collector, which can greatly increase the powder utilization efficiency. (2) The present invention uses a rotating and lifting support mechanism and a cavity translation mechanism to simultaneously control the relative position of the overall equipment and the conveyor belt. A reference line laser emission device is used to position the scraping position in the ranging system. A soft scraper belt composed of soft prismatic scrapers is used to continuously scrape the powder layer on the continuous conveyor belt with the assistance of an adjustable scraper pressure and a distance measuring device for the scraping position. The control has a high degree of automation. The rotation speed, angle and pressure of the soft scraper belt can be adjusted according to the conveyor belt speed and the base film material. The decomposition speed acts on the surface of the base film material to ensure that it is the same as the conveyor belt speed in the conveyor belt direction. At the same time, the component speed towards the edge of the base film can carry the powder away from the base film. During the scraping process, the flexible base film does not wrinkle and does not damage the adhesion between the powder layer to be retained and the sprayed base film. (3) The present invention is equipped with a scraper belt cleaning system and a powder recovery device. The electrostatic spraying powder after scraping usually still has a certain electrostatic adsorption force and will gather on the surface of the scraper edge. The use of elastic fiber cleaning wheel for tangential or transverse cleaning can greatly reduce the residue of powder on the scraper belt surface. At the same time, the electrostatic elimination ion air gun array is introduced to eliminate the static electricity of the powder. The two work together to keep the scraper surface clean, reduce the accumulation of dust in the scraper gap during the scraping process, and collect the scraped powder into the powder recovery hood through negative pressure. There is no powder splashing or scattering into the surrounding environment, keeping the entire work station clean. (4) The present invention uses several electrostatic elimination ion air gun arrays to form an air curtain to electrostatically eliminate the residual powder on the surface of the scraper belt and the powder falling into the powder recovery hood. This can greatly reduce the electrostatic adhesion of the powder, improve the efficiency of cleaning the scraper belt, and avoid the accumulation of powder in the powder recovery hood. (5) The present invention has a high degree of integration and a wide range of applicable materials. It is particularly suitable for spraying and cleaning of flexible substrates such as ultra-thin copper foil, aluminum foil, stainless steel foil and other foils required for the preparation of lithium-ion batteries. The powder layer is cut smoothly and the powder recovery efficiency is high. It has a wide range of application prospects in the fields of energy storage device development, optical film material, hot melt paint spraying and other fields. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the continuous electrostatic spraying base film edge powder layer removal device described in this invention; Figure 2 This is a top view of the perspective state of the first embodiment of the continuous electrostatic spraying base film edge powder layer removal device of the present invention; Figure 3 yes Figure 2 A schematic diagram of the front cross-sectional structure along the A-A' direction; Figure 4 yes Figure 2 A schematic diagram of the rear cross-sectional structure along the A-A' direction; Figure 5 This is a top view of the perspective state of the second embodiment of the continuous electrostatic spraying base film edge powder layer removal device of the present invention; Figure 6 yes Figure 5 A schematic diagram of the front cross-sectional structure along the A-A' direction; Figure 7 yes Figure 5 A schematic diagram of the rear cross-sectional structure along the A-A' direction; Figure 8 This is a partially enlarged schematic diagram of the vertical pressing pressure adjustment device in this invention, wherein (a) is a side view in the first direction, (b) is a side view in the second direction, and (c) is a cross-sectional view of (b) along the B-B' direction. Figure 9 This is a schematic diagram of the multi-round cleaning mode structure of the second embodiment of the continuous electrostatic spraying base film edge powder layer removal device of the present invention; Figure 10 It is a diagram showing the relationship between the control circuit and various parameters of the central control console.

[0023] The labels for the attached figures are as follows: 1-Sprayed base film; 2-Sprayed powder layer; 3-Liner plate; 4-Edge powder layer scraping device; 401-Support frame; 402-Cavity translation mechanism; 403-Drive motor; 404-Active support wheel; 404-1-Active support wheel rotation shaft; 405-Internal support plate; 405-1-Sliding support frame; 406-Driven support wheel; 406-1-Driven support wheel rotation shaft; 407-Tension bar; 408-Soft scraper belt; 409-Cavity outer shell; 410-Scraper cleaning system; 410-1-First elastic fiber cleaning wheel; 410-2-Cleaning drive motor; 410-3-First bevel gear; 410-4-Second bevel gear; 410-5-First electrostatic eliminator ion air gun array; 410-6-Cleaning system support component; 410-7-Second elastic fiber cleaning wheel Wheel; 410-8-Sweeping drive wheel; 410-9-Transmission belt; 410-10-Sweeping driven wheel; 410-11-Sweeping system fixing component; 410-12-Second electrostatic eliminator ion air gun array; 410-13-Connecting rod; 5-Exposed base film; 6-Powder recovery device; 601-Powder recovery hood; 602-Recovery dust collection device; 603-Powder recovery pipeline; 604-Vibration module; 7-Crushed powder; 8-Coaxial tension regulator; 9-Vertical pressing pressure adjustment device; 901-Protrusion; 902-Square hole; 903-Detection frame; 904-Vertical pressure detector; 905-Driven wheel axle support rod; 10-Reference line laser emitting device; 11-Control panel and parameter display PLC; 12-Rotation and lifting support mechanism; 13-Liner lifting mechanism. Detailed Implementation

[0024] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0025] This invention provides a continuous electrostatic spraying base film edge powder layer removal device. The device uses a soft scraper to scrape the powder at the edge of the base film to a recycling device at a set width. By removing the powder at the edge, the powder on the surface of the base film is cut to a fixed width, eliminating the problem of uneven powder thickness in subsequent processing, improving the uniformity and controllability of the film thickness, and leaving empty edge base film for subsequent machining.

[0026] Example 1 like Figures 1 to 4As shown, the present invention provides a continuous electrostatic spraying base film edge powder layer removal device, comprising: a spraying base film 1, on which a spraying powder layer 2 is sprayed, and a liner 3 is fixedly provided on the side of the spraying base film 1 facing away from the spraying powder layer 2, and the liner 3 is supported and placed on the ground by a liner lifting mechanism 13. Edge powder removal device 4, two edge powder removal devices 4 are symmetrically arranged on both sides of the spray base film 1 with adjustable angle and adjustable distance between them, and the two edge powder removal devices 4 are in contact with the sprayed surface of the spray base film 1. The edge powder removal devices 4 are used to remove the spray powder layer on both sides of the spray base film 1 to form the bare base film 5; the edge powder removal devices 4 can adjust the front and back distance in a direction perpendicular to the running direction of the spray base film, and can rotate to adjust the angle with the running direction of the spray base film in a plane parallel to the running direction of the spray base film; Vertical pressure adjustment device 9 is installed inside edge powder layer scraping device 4 to detect and adjust the vertical pressure between edge powder layer scraping device 4 and spray base film 1. The powder recovery device 6 is located below the edge powder layer scraping device 4 and is used to receive and recover the broken powder 7 scraped off from the spray base film 1 by the edge powder layer scraping device 4.

[0027] In the above embodiments, preferably, as follows: Figure 8 As shown, the vertical pressing pressure adjustment device 9 includes: a detection frame 903 with a protrusion 901 and a square hole 902, a vertical pressure detector 904, and a driven wheel axle support rod 905; one end of the driven wheel axle support rod 905 is a free end, and the other end is connected to the first end of the vertical pressure detector 904; the vertical pressure detector 904 is disposed in the square hole 902 of the detection frame 903, and its second end abuts against the top of the detection frame 903.

[0028] In the above embodiments, preferably, as follows: Figure 3 and Figure 4As shown, the edge powder layer scraping device 4 includes: a support frame 401 for supporting the edge powder layer scraping device 4, which can be raised, lowered, and rotated by the adjustment of the rotation and lifting support mechanism 12; a cavity translation track is provided on the support frame 401; a cavity translation mechanism 402 is provided on the support frame 401 and slides on the cavity translation track under the drive of the translation drive motor (not shown in the figure) to drive the edge powder layer scraping device 4 to move back and forth in a direction perpendicular to the operation of the sprayed base film; a drive motor 403 is provided above the support frame 401; two internal support plates 405 are provided, one on one side and the other on the opposite side of the drive motor 403, and a horizontal sliding support frame 405-1 is provided on the internal support plate 405; an active support wheel 404 and an active support wheel rotation shaft 404-1, one end of the active support wheel rotation shaft 404-1 is connected to the drive motor 403, and the other end passes through the active support wheel 404 and is connected to the internal support plate 405 through a bearing; Driven support wheel 406 and driven support wheel rotating shaft 406-1 (see...) Figure 8 The driven support wheel rotating shaft 406-1 passes through the driven support wheel 406, with its first end extending into the square hole 902 of the detection frame 903 on the first side and connecting to the free end of the driven wheel shaft support rod 905 on the corresponding side; its second end extends into the square hole 902 of the detection frame 903 on the second side and connects to the free end of the driven wheel shaft support rod 905 on the corresponding side; the driven support wheel 406 is correspondingly set to the edge of the powder layer to be scraped off on the sprayed base film 1; There are two tension rods 407. One end of the tension rod 407 is sleeved on the rotating shaft 404-1 of the active support wheel, and the other end is connected to the protrusion 901 of the detection frame 903 through a bearing. The protrusion 901 of the detection frame 903 extends into the sliding support frame 405-1 and can slide horizontally within the sliding support frame 405-1. The soft scraper belt 408 is sleeved on the outside of the active support wheel 404 and the driven support wheel 406. When the drive motor 403 drives the active support wheel 404 to rotate, it drives the driven support wheel 406 to rotate, and drives the soft scraper belt 408 to rotate. The outer shell 409 covers the entire structure formed by the active support wheel 404, the driven support wheel 406, and the soft scraper belt 408, and is connected to the drive motor 403.

[0029] In the above embodiments, preferably, the soft scraper belt 408 includes a scraper carrier belt and a soft scraper; a plurality of the soft scrapers are spaced apart and arranged at a set angle to the rolling direction of the scraper carrier belt on the outer ring of the scraper carrier belt, so that when the scraper carrier rotates, the soft scrapers scrape off the sprayed powder layer at the edge of the sprayed base film in contact with them; the inner ring of the scraper carrier belt has a trapezoidal tooth structure perpendicular to its direction of movement, and the surfaces of the active support wheel and the driven support wheel are provided with trapezoidal grooves that match the trapezoidal tooth structure, so as to prevent the scraper carrier belt from slipping during operation due to powder entering the gap between it and the active support wheel or the driven support wheel.

[0030] In the above embodiment, preferably, a coaxial tension adjuster 8 with a display reading is provided on the tension bar 407; a reference line laser emitting device 10 is provided on the cavity shell near the sprayed base film 1, the reference line laser emitting device 10 is configured to mark the boundary of the contact between the scraper belt and the base film on the powder layer, so that the reference line angle is always parallel to the belt travel direction; a central control panel and parameter display PLC 11 are provided on the cavity shell 409, the central control panel and parameter display PLC 11 are used to control the height of the support frame 401, the angle between the support frame 401 and the belt travel direction, the position of the cavity translation mechanism 402, the vertical pressure detector 904, the reference line laser emitting device 10, and the drive motor 403. The related diagram is shown below. Figure 10 As shown.

[0031] In the above embodiments, preferably, the edge powder removal device 4 further includes a scraper cleaning system 410, which is used to remove residual powder on the soft scraper belt 408.

[0032] In the above embodiments, preferably, the scraper cleaning system 410 includes: a first elastic fiber cleaning wheel 410-1, a cleaning drive motor 410-2, a cleaning gear set, a first electrostatic eliminator ion air gun array 410-5, and a cleaning system support 410-6; the cleaning gear set includes a first bevel gear 410-3 and a second bevel gear 410-4; the first elastic fiber cleaning wheel 410-1 is provided with the second bevel gear 410-4 at its top; the output shaft of the cleaning drive motor 410-2 is connected to the first bevel gear 410-3 to drive the first bevel gear 410-3 to rotate; The first bevel gear 410-3 meshes with the second bevel gear 410-4 at the top of the first elastic fiber sweeping wheel 410-1; so that when the sweeping drive motor 410-2 drives the first bevel gear 410-3 to rotate, it drives the second bevel gear 410-4 meshing with it to rotate, so that the first elastic fiber sweeping wheel 410-1 rotates perpendicular to the running direction of the soft scraper belt 408, thereby achieving tangential sweeping; the first elastic fiber sweeping wheel 410-1 is in contact with the soft scraper belt 408; One end of the cleaning system support 410-6 is connected to the cavity shell 409, and the other end is rotatably connected to the first elastic fiber cleaning wheel 410-1; The first electrostatic eliminator ion air gun array 410-5 is disposed below the soft scraper belt 408 and is used to blow out ion air to assist in cleaning the surface of the soft scraper belt 408 and neutralizing the charged powder adsorbed in the soft scraper belt 408.

[0033] In the above embodiments, preferably, the cleaning device further includes: a rotation and lifting support mechanism 12, which is disposed below the support frame 401 and fixed to the support frame 401, for adjusting the height and angle of the edge powder layer scraping device 4; the rotation and lifting support mechanism 12 is electrically or signal connected to the main control panel and parameter display PLC 11.

[0034] In the above embodiment, preferably, the powder recovery device 6 includes a powder recovery hood 601, a recovery dust collection device 602, a powder recovery pipeline 603, and a vibration module 604; the two powder recovery hoods 601 are respectively disposed below the edge powder layer scraping devices 4 on both sides; the two powder recovery hoods 601 are respectively connected to the recovery dust collection device 602 through the powder recovery pipeline 603; the vibration module 604 is provided on the outside of the powder recovery hood 601, and the vibration module 604 is used to vibrate the powder recovery hood 601 at an adjustable frequency to facilitate powder recovery; the recovery dust collection device 602 is electrically or signal connected to the main control panel and parameter display PLC 11 to control the dust collection negative pressure wind speed through the main control panel and parameter display PLC 11.

[0035] In the above embodiments, preferably, the central control console and parameter display PLC11 includes: The positioning module is used to mark the position of the soft scraper belt on the powder layer surface using a laser. The angle control is linked to the angle of the rotating platform. The reference line angle is always parallel to the belt direction. It positions the spatial position of the soft scraper belt and the driven support wheel, and provides feedback control for the rotation and lifting mechanism, adjusting the horizontal position, angle and height of the driven support wheel and the sprayed base film. The powder scraping module is used to detect the tension bar and vertical pressing pressure values ​​during the horizontal scraping process of the rolling soft scraper belt contacting the powder on the sprayed base film, and to adjust the rotation speed of the scraper belt. The scraper cleaning module is used to cut and sweep or vertically rotate to sweep away residual powder on the soft scraper, and controls the start and stop of the scraper cleaning system and the cleaning speed. The dust collection and recovery module is used to eliminate residual static charge in electrostatic spraying powder and to separate and recover the powder, as well as to control the start and stop of the powder recovery device and its vibration module and the dust collection power.

[0036] It should be noted that the working process of Embodiment 1 of the present invention is as follows: First, based on the belt speed to be scraped, the characteristics of the powder layer, and the characteristics of the base film, the material type and scraper spacing of the soft scraper belt are selected. After opening the top cover of the cavity shell and assembling the soft scraper belt, the top cover of the cavity shell of the edge powder layer scraping device is closed. The edge powder layer scraping device is placed on both sides of the belt to be scraped using a rotation and lifting support mechanism. The scraper plane is at least 5mm higher than the thickest part of the powder layer. A specific scraping angle and the running speed of the soft scraper belt are fixed according to the belt speed, so that its velocity component in the belt direction is the same as the belt speed, and the velocity component perpendicular to the belt speed direction can be used to scrape the powder. The tension rod is adjusted to ensure that the soft scraper belt and the driven support wheel are tightly fitted at the powder scraping position; the rotating shaft of the driven support wheel is floatingly connected to the tension rod through a vertical pressing pressure adjustment device.

[0037] After determining the scraping direction, the entire platform is slowly lowered through the rotation and lifting support mechanism, while the cavity translation mechanism moves the platform so that the driven support wheel of the soft scraper belt comes into contact with the sprayed base film, squeezing the vertical pressure detector. Once the pressure reaches the set threshold, the lifting action stops, and this height is maintained throughout the subsequent scraping process to maintain a fixed pressure on the base film.

[0038] When the electrostatically sprayed powder layer passes the scraper, it retains a certain electrostatic load. During the scraping process, some powder falls into the negative pressure dust collection hood due to gravity, while the remaining powder remains adsorbed in the scraper gaps. The first electrostatic ion-eliminating air gun array neutralizes this, reducing the powder's electrostatic adsorption to the scraper before it enters the scraper cleaning system. The air supply pressure of the electrostatic ion-eliminating air gun array is adjusted according to different powders to prevent them from being blown away. The first elastic fiber cleaning wheel and the soft scraper belt operate in a reverse shearing mode. The brushes of the first elastic fiber cleaning wheel, made of elastic plastic or stainless steel, clean the powder in the scraper gaps. The cleaned powder falls into the dust collection hood and is collected in the dust collector.

[0039] Example 2 like Figure 5-7As shown, unlike Embodiment 1, the shearing cleaning system adopts a tangential sweeping mode, specifically including: at least one second elastic fiber cleaning wheel 410-7, a cleaning drive wheel 410-8, a transmission belt 410-9, a cleaning driven wheel 410-10, a cleaning system fixing component 410-11, a second electrostatic eliminator ion air gun array 410-12, and a connecting rod 410-13; the cleaning drive wheel 410-8 is mounted on the rotating shaft 404-1 of the active support wheel of the edge dust removal device 4, and rotates synchronously with the active support wheel 404; the cleaning driven wheel 410-10 is mounted on the rotating shaft of the second elastic fiber cleaning wheel 410-7, and rotates synchronously with the second elastic fiber cleaning wheel 410-7; the transmission belt 410-9 is sleeved on the outside of the cleaning drive wheel 410-8 and the cleaning driven wheel 410-10; the second elastic fiber cleaning wheel 410-7 is in contact with the soft scraper belt 408; When the drive motor 403 drives the active support wheel 404 to rotate, the cleaning drive wheel 410-8 rotates synchronously with it, and drives the cleaning driven wheel 410-10 to rotate under the action of the transmission belt 410-9, so as to synchronously drive the second elastic fiber cleaning wheel 410-7 to rotate, thereby cleaning the residual powder on the soft scraper belt 408. The cleaning system fixing component 410-11 is fixed to the inner wall of the cavity shell 409. The rotation shaft of the cleaning drive wheel 410-8 and the rotation shaft of the cleaning driven wheel 410-10 are rotatably connected to the cleaning system fixing component 410-11 respectively. One end of the connecting rod 410-13 is rotatably connected to the rotation shaft of the second elastic fiber cleaning wheel 410-7, and the other end is rotatably connected to the rotation shaft of the active support wheel 404-1. The second electrostatic eliminator ion air gun array 410-12 is disposed below the soft scraper belt 408 and is used to blow out ion air to assist in cleaning the surface of the soft scraper belt 408 and neutralizing the charged powder adsorbed in the soft scraper belt 408.

[0040] In the above embodiments, preferably, as follows: Figure 9 As shown, there are multiple second elastic fiber sweeping wheels 410-7 and multiple sweeping driven wheels 410-10; the sweeping driven wheels 410-10 are mounted on the rotating shaft of the corresponding second elastic fiber sweeping wheel 410-7; each sweeping driven wheel 410-10 is connected to the sweeping drive wheel 410-8 via a transmission belt 410-9; each second elastic fiber sweeping wheel 410-7 is in contact with the soft scraper belt 408; when the sweeping drive wheel 410-8 rotates, it drives each sweeping driven wheel 410-10 to rotate, thereby driving each second elastic fiber sweeping wheel 410-7 to rotate synchronously, so as to achieve multi-layer sweeping of the soft scraper belt 408.

[0041] In the above embodiments, preferably, the inner ring of the transmission belt 410-9 and the outer rings of the sweeping drive wheel 410-8 and the sweeping driven wheel 410-10 are provided with anti-slip toothed structures so that the sweeping drive wheel 410-8 and the transmission belt 410-9 do not slip when moving, and the sweeping driven wheel 410-10 and the transmission belt 410-9 do not slip when moving.

[0042] Example 3 The present invention also provides a method for using a continuous electrostatic spraying base film edge powder layer removal device, comprising the following steps: The material of the soft scraper belt is selected according to the material of the base film and the type of powder layer. After replacing the soft scraper belt with a suitable one, the tension bar is set to the set tension. The tension setting is determined by the hardness and elasticity of the soft scraper belt. A soft scraper belt with high hardness and poor elasticity requires high tension to make it fit the active support wheel and the driven support wheel, while a soft scraper belt with low hardness and high elasticity needs to reduce the tension to avoid shrinkage or breakage of the soft scraper belt. The edge powder removal device is raised as a whole, so that the lower edge of the soft scraper belt is 5-10mm above the horizontal plane of the spray base film. The two edge powder removal devices are simultaneously turned to the opposite direction of the spray base film, so that the scraping direction (scraper belt running direction) of the two edge powder removal devices is symmetrical about the left and right along the central axis of the spray base film and at a set angle. The unsprayed part of the spray base film is passed through the liner at the bottom of the scraping area and the lower edge of the soft scraper belt. The reference line laser emission device is turned on to mark the scraping edge on the spray base film. The translation drive motor drives the cavity translation mechanism to move back and forth to reach the set scraping edge distance. The linkage base film unwinding and rewinding equipment reads the speed of the sprayed base film conveyor belt. The main control panel and parameter display PLC automatically calculate the required operating speed of the soft scraper belt. At the same time as the sprayed base film begins to move, the drive motor is started to drive the soft scraper belt to rotate. The dust collection mode of the powder recovery device is activated, and then the edge powder layer scraping device is lowered so that the lower edge of the soft scraper belt contacts the sprayed base film. The soft scraper belt is pressed down so that the vertical pressing pressure adjustment device reaches the set pressure. The edge powder layer scraping device scrapes off the sprayed powder layer at the edge of the sprayed base film at a set distance.

[0043] The following two application examples further illustrate the working process of this invention: Application Example 1: This application example uses silicon-carbon anode powder particles as the coating material, with nitrogen gas at 0.6 MPa as the carrier gas. The powder is sprayed from room temperature to 100°C, and a 10 μm thick stainless steel foil is used as the base film. It operates under the conditions of a sweeping cleaning brush case, and specifically includes the following steps: Step 1: Select a high-temperature resistant silicone trapezoidal scraper with 1mm spacing as the soft scraper belt material. The running angle between the soft scraper and the scraper carrier belt is 45°. The drive belt with trapezoidal teeth (i.e., the scraper carrier belt of the soft scraper belt) is tensioned between the active support wheel and the driven support wheel. Install the inner tooth marks of the matching trapezoidal teeth belt. The initial tension should be 5% of the minimum breaking strength of the belt. Run the machine empty for 5 minutes, and then adjust the tension to 10% of the minimum breaking strength of the belt. Set the scraping position 10mm above the liner. Preheat the liner to 100℃ in advance. Step 2: Pass the uncoated stainless steel base film through the gap between the soft scraper belt and the bottom of the liner, and install it on the stainless steel base film unwinding and rewinding equipment, setting the belt speed V. 走带 = 2-10 m / min. Adjust the angle between the edge dust removal device and the base film running direction to 45°, and simultaneously adjust the distance of the edge dust removal device perpendicular to the base film running direction. Set the linear speed of the soft scraper belt rotation to V. 刮刀带 = V 走带 ÷cos(45°) = 2.83-14.14 m / min, turn on the reference line laser emission device, and mark the scraping edge on the stainless steel base film surface. Turn on the base film conveyor belt and the soft scraper belt, lower the edge powder removal device so that the lower edge of the soft scraper belt contacts the aluminum foil base film, with a pressure of 6-30N, turn on the recovery dust collection device to start dust collection, and turn on the first electrostatic eliminator ion air gun array and the first elastic fiber cleaning wheel to start cleaning the surface of the soft scraper belt.

[0044] Step 3: Initiate the silicon-carbon anode powder particle spraying process. As the powder layer travels through the stainless steel base film to the scraping chamber, within the scraping distance, it is broken up by the soft scraper belt and pushed out of the edge of the sprayed base film by the lateral velocity of the soft scraper belt, entering the dust collection hood. The first electrostatic eliminator ion air gun array eliminates the residual static electricity of the scraped powder by spraying ion air, reducing its adsorption capacity, facilitating its entry into the powder recovery hood, and making it easier for the first elastic fiber cleaning wheel to sweep it out of the scraper gap. The scraped powder is collected in the dust collector, filtered, backwashed, and settled before entering the collection bag for recycling.

[0045] Step 4: First, stop the spraying process. After all the sprayed powder layers have passed through the edge powder layer scraping device, keep the soft scraper belt and the brush roller running for 3 minutes. Turn off the reference line laser emission device, control the rotation and raise the lifting platform by 10mm, then stop the soft scraper belt and the brush roller running. Reduce the tension of the tension bar and remove the scraper belt to prevent the scraper belt from deforming due to long-term tension.

[0046] Application Example 2: This application example uses ternary electrode particles as the spraying powder, with 0.6MPa compressed air as the carrier gas. The powder is sprayed at room temperature onto a 12μm aluminum foil base film. The application operates under the conditions of a shearing cleaning brush, and specifically includes the following steps: Step 1: Select polyurethane trapezoidal scraper strips with 2mm spacing as the soft scraper belt material. The drive belt lined with trapezoidal teeth (i.e., the scraper carrier belt of the soft scraper belt) is tensioned between the active support wheel and the driven support wheel. Install the inner tooth marks of the matching trapezoidal teeth belt. The initial tension should be 8% of the minimum breaking strength of the belt. Run the machine empty for 5 minutes, and then adjust the tension to 12% of the minimum breaking strength of the belt. The scraping position is located 10mm above the 302 stainless steel substrate. Step 2: Pass the uncoated aluminum foil through the gap between the scraper belt and the bottom of the liner plate, and install it on the base film unwinding and rewinding equipment, setting the belt speed V. 走带 = 5-20 m / min. Adjust the angle between the edge powder removal device and the base film conveyor belt direction to 70°, and set the linear speed of the soft scraper belt rotation to V. 刮刀带 = V 走带 ÷cos(70°)=14.62-58.48 m / min, turn on the reference line laser emission device, mark the scraping edge on the stainless steel sheet surface; turn on the base film conveyor belt and the scraper belt, lower the scraping chamber so that the lower edge of the scraper belt contacts the aluminum foil base film, the pressure is 1-10N, turn on the recycling dust collection device to start dust collection, turn on the second electrostatic eliminator ion air gun array and the second elastic fiber cleaning wheel to start cleaning the scraper surface.

[0047] Step 3: Start NCM811 spraying. When the powder layer travels through the base film to the scraping chamber, the powder layer within the scraping distance is cut and broken by the soft scraper belt. Under the action of the horizontal component velocity of the soft scraper belt, it is pushed out of the edge of the base film and enters the powder recovery hood. The second electrostatic elimination ion air gun array eliminates the residual static electricity of the scraped powder by spraying ion air, reducing its adsorption capacity, which is conducive to entering the powder recovery hood and easy to be swept out of the scraper gap by the second elastic fiber cleaning wheel. The scraped powder is collected in the dust collector, filtered and backwashed, and then enters the collection bag for recycling.

[0048] Step 4: First, stop the spraying process. After all the sprayed powder layers have passed through the edge powder layer scraping device, keep the soft scraper belt and the cleaning roller with brush running for 3 minutes. Turn off the reference line laser emission device. After controlling the rotation and raising the lifting platform by 10mm, you can stop the soft scraper belt and the second elastic fiber cleaning roller. Reduce the tension of the tension bar and remove the soft scraper belt to prevent the scraper belt from deforming due to long-term tension.

[0049] In addition, it should be noted that the liner of the present invention has a self-heating function. Specifically, an electric heating wire or a hot water circulation pipe can be installed inside to achieve the heating function.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for removing powder layer from the edge of a continuous electrostatic sprayed base film, characterized in that, include: A base film is sprayed with a powder coating. A liner is fixedly installed on the side of the base film facing away from the powder coating. The liner is supported and placed on the ground by a liner lifting mechanism. An edge powder layer scraping device is provided. Two edge powder layer scraping devices are symmetrically arranged on both sides of the sprayed base film with adjustable angle and adjustable spacing. The two edge powder layer scraping devices are in contact with the sprayed surface of the sprayed base film. The edge powder layer scraping devices are used to scrape off the sprayed powder layer on both sides of the sprayed base film to form a bare base film. A vertical pressure adjustment device is installed inside the edge powder layer scraping device to detect and adjust the vertical pressure between the edge powder layer scraping device and the sprayed base film. A powder recovery device is located below the edge powder layer scraping device and is used to receive and recover the broken powder scraped off from the sprayed base film by the edge powder layer scraping device.

2. The continuous electrostatic spraying base film edge powder layer removal device according to claim 1, characterized in that, The vertical pressing pressure adjustment device includes: a detection frame with protrusions and square holes, a vertical pressure detector, and a driven wheel axle support rod; One end of the driven wheel axle support rod is a free end, and the other end is connected to the first end of the vertical pressure detector; The vertical pressure detector is disposed in the square hole of the detection frame, and its second end abuts against the top of the detection frame.

3. The continuous electrostatic spraying base film edge powder layer removal device according to claim 2, characterized in that, The edge powder layer scraping device includes: A support frame is used to support the edge powder scraping device. It can be raised, lowered, and rotated by the adjustment of the rotation and lifting support mechanism. The support frame is provided with a cavity translation track. A cavity translation mechanism is mounted on the support frame and slides on the cavity translation track under the drive of a translation drive motor; A drive motor is positioned above the support frame; There are two internal support plates, which are respectively set on one side and the opposite side of the drive motor. The internal support plates are provided with horizontal sliding support frames. An active support wheel and an active support wheel rotation shaft, one end of which is connected to the drive motor, and the other end of which passes through the active support wheel and is connected to the internal support plate via a bearing; A driven support wheel and a driven support wheel rotation shaft are connected. The driven support wheel rotation shaft passes through the driven support wheel, with its first end extending into a square hole in the detection frame on the first side and connecting to the free end of the driven wheel shaft support rod on the corresponding side; its second end extends into a square hole in the detection frame on the second side and connects to the free end of the driven wheel shaft support rod on the corresponding side; the driven support wheel is positioned corresponding to the edge of the powder layer to be scraped off on the sprayed base film. There are two tension rods. One end of each tension rod is sleeved on the rotating shaft of the active support wheel, and the other end is connected to the protrusion of the detection frame through a bearing. The protrusion of the detection frame extends into the corresponding sliding support frame and can slide horizontally within the sliding support frame. The soft scraper belt is sleeved outside the active support wheel and the driven support wheel. When the drive motor drives the active support wheel to rotate, it drives the driven support wheel to rotate, and in turn drives the soft scraper belt to rotate. The outer shell of the cavity covers the entire structure formed by the active support wheel, the driven support wheel, and the soft scraper belt, and is connected to the drive motor.

4. The continuous electrostatic spraying base film edge powder layer removal device according to claim 3, characterized in that, The soft scraper belt includes a scraper carrier belt and a soft scraper; Several soft scrapers are spaced apart and arranged at a set angle to the rolling direction of the scraper carrier belt on the outer ring of the scraper carrier belt, so that when the scraper carrier rotates, the soft scrapers scrape off the sprayed powder layer at the edge of the sprayed base film that is in contact with them. The inner ring of the scraper carrier belt has a trapezoidal tooth structure perpendicular to its direction of movement. The surfaces of the active support wheel and the driven support wheel are provided with trapezoidal grooves that match the trapezoidal tooth structure, so as to prevent the scraper carrier belt from slipping during operation due to powder entering the gap between it and the active support wheel or the driven support wheel.

5. The continuous electrostatic spraying base film edge powder layer removal device according to claim 3, characterized in that, The tension bar is equipped with a coaxial tension adjuster with a display reading; A reference line laser emitting device is provided near the sprayed base film in the outer shell of the cavity. The reference line laser emitting device is configured to mark the boundary of the contact between the doctor blade and the base film on the powder layer so that the reference line angle is always parallel to the direction of the tape travel. The cavity shell is equipped with a central control console and a parameter display PLC. The central control console and parameter display PLC are used to control the height of the support frame, the angle between the support frame and the conveyor belt direction, the position of the cavity translation mechanism, the vertical pressure detector, the reference line laser emitting device, and the drive motor.

6. The continuous electrostatic spraying base film edge powder layer removal device according to claim 3, characterized in that, The edge powder removal device also includes a scraper cleaning system for removing residual powder from the soft scraper.

7. The continuous electrostatic spraying base film edge powder layer removal device according to claim 6, characterized in that, The scraper cleaning system includes: a first elastic fiber cleaning wheel, a cleaning drive motor, a cleaning gear set, a first electrostatic eliminator ion air gun array, and a cleaning system support component; The cleaning gear set includes a first bevel gear and a second bevel gear; The first elastic fiber cleaning wheel is provided with a second bevel gear at its top; The output shaft of the sweeping drive motor is connected to the first bevel gear to drive the first bevel gear to rotate; The first bevel gear meshes with the second bevel gear at the top of the first elastic fiber sweeping wheel; so that when the sweeping drive motor drives the first bevel gear to rotate, it drives the second bevel gear meshing with it to rotate, so that the first elastic fiber sweeping wheel rotates perpendicular to the running direction of the soft scraper belt, thereby achieving tangential sweeping; the first elastic fiber sweeping wheel is in contact with the soft scraper belt; One end of the cleaning system support is connected to the outer shell of the cavity, and the other end is rotatably connected to the first elastic fiber cleaning wheel. The first electrostatic eliminator ion gun array is positioned below the soft scraper belt and is used to blow out ion air to assist in cleaning the surface of the soft scraper belt and neutralizing the charged powder adsorbed in the soft scraper belt.

8. The continuous electrostatic spraying base film edge powder layer removal device according to claim 6, characterized in that, The scraper cleaning system includes: at least one second elastic fiber cleaning wheel, a cleaning drive wheel, a transmission belt, a cleaning driven wheel, a cleaning system fixing component, a second electrostatic eliminator ion air gun array, and a connecting rod; The sweeping drive wheel is mounted on the rotating shaft of the active support wheel of the edge dust removal device and rotates synchronously with the active support wheel; the sweeping driven wheel is mounted on the rotating shaft of the second elastic fiber sweeping wheel and rotates synchronously with the second elastic fiber sweeping wheel; the transmission belt is sleeved on the outside of the sweeping drive wheel and the sweeping driven wheel; the second elastic fiber sweeping wheel is in contact with the soft scraper belt; When the drive motor drives the active support wheel to rotate, the sweeping drive wheel rotates synchronously with it and drives the sweeping driven wheel to rotate under the action of the transmission belt, so as to synchronously drive the second elastic fiber sweeping wheel to rotate, thereby sweeping the residual powder on the soft scraper belt. The cleaning system fixing component is fixed to the inner wall of the cavity shell, and the rotation shaft of the cleaning drive wheel and the rotation shaft of the cleaning driven wheel are respectively rotatably connected to the cleaning system fixing component; One end of the connecting rod is rotatably connected to the rotating shaft of the second elastic fiber cleaning wheel, and the other end is rotatably connected to the rotating shaft of the active support wheel; The second electrostatic eliminator ion gun array is positioned below the soft scraper belt and is used to blow out ion air to assist in cleaning the surface of the soft scraper belt and neutralizing the charged powder adsorbed in the soft scraper belt.

9. The continuous electrostatic spraying base film edge powder layer removal device according to claim 8, characterized in that, There are multiple second elastic fiber sweeping wheels, and there are also multiple sweeping driven wheels; The driven sweeping wheel is mounted on the rotating shaft of the corresponding second elastic fiber sweeping wheel; Each driven sweeping wheel is connected to the drive sweeping wheel via the transmission belt, and each of the second elastic fiber sweeping wheels is in contact with the soft scraper belt; When the sweeping drive wheel rotates, it drives each sweeping driven wheel to rotate, thereby driving each second elastic fiber sweeping wheel to rotate synchronously, so as to achieve multi-layer sweeping of the soft scraper belt.

10. The continuous electrostatic spraying base film edge powder layer removal device according to claim 8, characterized in that, The inner ring of the transmission belt and the outer rings of the sweeping drive wheel and the sweeping driven wheel are all provided with anti-slip toothed structures to prevent slippage between the sweeping drive wheel and the transmission belt and between the sweeping driven wheel and the transmission belt during movement.

11. The continuous electrostatic spraying base film edge powder layer removal device according to claim 5, characterized in that, Also includes: A rotating and lifting support mechanism is provided below the support frame and fixed to the support frame, and is used to adjust the height and angle of the edge powder layer scraping device; The rotating and lifting support mechanism is electrically or signal-connected to the main control panel and parameter display PLC.

12. The continuous electrostatic spraying base film edge powder layer removal device according to claim 5, characterized in that, The powder recovery device includes a powder recovery hood, a dust collection device, a powder recovery pipeline, and a vibration module; The two powder recovery hoods are respectively located below the edge powder scraping device on both sides; The two powder recovery hoods are respectively connected to the recovery dust collection device through powder recovery pipelines; The powder recovery hood is equipped with a vibration module on its outer side. The vibration module is used to vibrate the powder recovery hood at an adjustable frequency to facilitate powder recovery. The vacuuming device is electrically or signal-connected to the central control panel and parameter display PLC to control the vacuuming negative pressure wind speed via the central control panel and parameter display PLC.

13. The continuous electrostatic spraying base film edge powder layer removal device according to claim 5, characterized in that, The central control console and parameter display PLC include: The positioning module is used to mark the position of the soft scraper belt on the powder layer surface using a laser. The angle control is linked to the angle of the rotating platform. The reference line angle is always parallel to the belt direction. It positions the spatial position of the soft scraper belt and the driven support wheel, and provides feedback control for the rotation and lifting mechanism, adjusting the horizontal position, angle and height of the driven support wheel and the sprayed base film. The powder scraping module is used to detect the tension bar and vertical pressing pressure values ​​during the horizontal scraping process of the rolling soft scraper belt contacting the powder on the sprayed base film, and to adjust the rotation speed of the soft scraper belt. The scraper cleaning module is used to cut and sweep or vertically rotate to sweep away residual powder on the soft scraper, and controls the start and stop of the scraper cleaning system and the cleaning speed. The dust collection and recovery module is used to eliminate residual static charge in electrostatic spraying powder and to separate and recover the powder, as well as to control the start and stop of the powder recovery device and its vibration module and the dust collection power.

14. A method of using the continuous electrostatic spraying base film edge powder layer removal device according to any one of claims 3 to 13, characterized in that, Includes the following steps: The material of the soft scraper belt is selected according to the material of the base film and the type of powder layer. After replacing the soft scraper belt with a suitable one, the tension bar is set to the set tension. The tension setting is determined by the hardness and elasticity of the soft scraper belt. A soft scraper belt with high hardness and poor elasticity requires high tension to make it fit the active support wheel and the driven support wheel, while a soft scraper belt with low hardness and high elasticity needs to reduce the tension to avoid shrinkage or breakage of the soft scraper belt. The edge powder removal device is raised as a whole, so that the lower edge of the soft scraper belt is 5-10mm above the horizontal plane of the spray base film. The two edge powder removal devices are simultaneously turned to the opposite direction of the spray base film operation, so that the scraping direction of the two edge powder removal devices is symmetrical about the left and right along the central axis of the spray base film and at a set angle. The unsprayed part of the spray base film is passed through the lower edge of the soft scraper belt and the liner at the bottom of the scraping area. The reference line laser emission device is turned on to mark the scraping edge on the spray base film. The translation drive motor drives the cavity translation mechanism to move back and forth to reach the set scraping edge distance. The linkage base film unwinding and rewinding equipment reads the speed of the sprayed base film conveyor belt. The main control panel and parameter display PLC automatically calculate the required operating speed of the soft scraper belt. At the same time as the sprayed base film begins to move, the drive motor is started to drive the soft scraper belt to rotate. The dust collection mode of the powder recovery device is activated, and then the edge powder layer scraping device is lowered so that the lower edge of the soft scraper belt contacts the sprayed base film. The soft scraper belt is pressed down so that the vertical pressing pressure adjustment device reaches the set pressure. The edge powder layer scraping device scrapes off the sprayed powder layer at the edge of the sprayed base film at a set distance.

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