Screen printing device

Abstract

The utility model discloses a silk-screen printing device, which relates to the technical field of battery piece sizing and comprises a mounting frame, a scraper component and a horizontally arranged screen plate, the screen plate is arranged on a support and provided with a plurality of sizing holes, the scraper component is positioned above the screen plate, an adjusting mechanism is arranged at the bottom of the mounting frame, and the scraper component is positioned above the screen plate. The adjusting mechanism at least comprises an X-axis adjusting mechanism and a Y-axis adjusting mechanism. By arranging the X-axis adjusting mechanism and the Y-axis adjusting mechanism, the position of the screen plate of the silk-screen printing device can be adjusted, the screen plate can better correspond to a battery piece, and the gluing quality of the battery piece is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery sheet gluing, in particular to a screen printing device. Background Art

[0002] The metal electrodes on the front and back of the battery cell are used to conduct internal current, and the grid lines mainly play the role of collecting the current of the secondary grid and connecting them in series. In order to reduce shading loss and silver consumption, the grid lines have become thinner and thinner during the development process.

[0003] Traditionally, the grid lines and cells are welded together using pad points. However, to further reduce costs, many manufacturers choose to reduce or eliminate pad points, which makes it difficult to securely fix the solder ribbon to the cell. To address this issue, screen printing can be used. First, the solder ribbon is pre-placed on the cell. The cell is then moved to the bottom of the screen printing device's stencil. The stencil has glue holes, allowing the glue to drip through the holes onto the corresponding glue positions on the cell. The glue is then transferred to a UV lamp for curing, replacing traditional welding fixation. This not only secures the solder ribbon, but also significantly reduces production costs. However, in actual use, cells are often prone to offset. When an offset cell moves to the bottom of the stencil, the glue points and holes do not correspond, resulting in lower glue quality.

[0004] Therefore, the present application provides a screen printing device to solve the technical problems in the prior art. Utility Model Content

[0005] In order to improve the quality of glue application and enable the glue application holes to correspond to battery cells with different offsets and different specifications, the present application provides a screen printing device.

[0006] The screen printing device provided in this application adopts the following technical solution:

[0007] A screen printing device includes a mounting frame, a scraper assembly and a horizontally arranged screen.

[0008] The mesh plate is set on the mounting frame, and is provided with a plurality of glue application holes.

[0009] The scraper assembly is located above the screen plate.

[0010] An adjustment mechanism is provided at the bottom of the mounting frame, and the adjustment mechanism at least includes an X-axis adjustment mechanism and a Y-axis adjustment mechanism.

[0011] Optionally, the scraper assembly includes a first scraper and a second scraper, the first scraper and the second scraper are both arranged at an angle, and the first scraper and the second scraper gradually move away from each other from top to bottom.

[0012] Optionally, the X-axis adjustment mechanism includes a first screw rod, a first motor for driving the first screw rod to rotate, a first bracket and a mounting plate. The length direction of the first screw rod is arranged along the X-axis. The first bracket is arranged above the mounting plate to support the first screw rod. A first slider is threadedly connected to the first screw rod. A transition plate is installed above the first slider. A first slide rail is also provided on the mounting plate, and a second slider is slidably connected to the first slide rail.

[0013] Optionally, the Y-axis adjustment mechanism includes a second screw rod, a second motor for driving the second screw rod to rotate, and a second bracket for supporting the second screw rod. The length direction of the second screw rod is arranged along the Y-axis. A third slider is threadedly connected to the second screw rod, and the third slider is fixed to the bottom of the mounting plate. The Y-axis adjustment mechanism also includes a second slide rail, a fourth slider is slidably provided on the second slide rail, and the fourth slider is fixed to the bottom of the mounting plate. The second slide rail is parallel to the length direction of the second screw rod.

[0014] Optionally, an angle adjustment mechanism is also provided on the mounting frame, and the angle adjustment mechanism includes a fourth motor, a reducer, a U-shaped plate, a gear set and a turntable. The fourth motor is connected to the reducer, and the reducer is fixed on the U-shaped plate. The U-shaped plate is arranged at the bottom of the transition plate. The output shaft of the reducer is connected to the gear set, and the gear set is connected to the turntable for controlling the rotation of the turntable. The turntable is connected to the mounting frame.

[0015] Optionally, the transition plate is arranged at the bottom of the mounting frame, with a gap between the transition plate and the mounting frame, and a plurality of universal balls are arranged on the transition plate, and the spherical surfaces of the universal balls abut against the bottom surface of the mounting frame.

[0016] Optionally, the mounting frame is also provided with a vertically arranged third screw rod, a third motor for controlling the rotation of the third screw rod, and a third bracket for supporting the third screw rod, a fifth slider is threadedly connected to the third screw rod, the fifth slider is fixed to the side of the mesh plate close to the mounting frame, a third slide rail is provided on the mounting frame, the third slide rail and the third screw rod are parallel to each other, a sixth slider is slidably connected to the third slide rail, and the sixth slider is fixed to the mesh plate.

[0017] Optionally, a vertical moving component and a horizontal moving component for driving the scraper assembly to move are provided on the mesh plate, the horizontal moving component includes an assembly plate, a horizontally arranged fourth screw rod and a fifth motor for driving the fourth screw rod to move, a fourth slide rail is provided on the assembly plate, the fourth slide rail is parallel to the length direction of the fourth screw rod, a seventh slider is slidably provided on the fourth slide rail, and the seventh slider is connected to the vertical moving component.

[0018] Optionally, the vertical moving assembly includes a vertically arranged fifth screw rod, a vertically arranged sixth screw rod, a sixth motor for driving the fifth screw rod to rotate, a seventh motor for driving the sixth screw rod to rotate, and a frame. The sixth motor and the seventh motor are both arranged on the frame. An eighth slider is rotatably arranged on the fifth screw rod, and a ninth slider is rotatably arranged on the sixth screw rod. The eighth slider and the ninth slider are both slidably connected to the frame. The eighth slider is used to drive the first scraper to rise and fall, and the ninth slider is used to drive the second scraper to rise and fall.

[0019] Optionally, the bottom transmission connection of the eighth slider is connected to a first connecting plate, the bottom transmission connection of the ninth slider is connected to a second connecting plate, the first connecting plate is installed with a first cylinder, the bottom of the second connecting plate is installed with a second cylinder, the output shaft of the first cylinder is connected to the first scraper, and the output shaft of the second cylinder is connected to the second scraper.

[0020] In summary, this application has at least the following beneficial effects:

[0021] 1. Set up an X-axis adjustment mechanism. The first motor drives the first screw to rotate. Under the joint action of the first slide rail and the second slider, the first slider moves horizontally along the length of the first screw. The first slider drives the transition plate. Since the transition plate and the mounting frame are rotatably connected, the transition plate can drive the entire mounting frame to move in the X-axis direction.

[0022] 2. Set up the Y-axis adjustment mechanism. The second motor drives the second screw to rotate. Under the joint action of the second slide rail and the fourth slider, the third slider moves horizontally along the length direction of the second screw. Since the second screw is arranged along the Y-axis direction, the third slider drives the mounting plate to move. The X-axis adjustment mechanism is installed above the mounting plate, thereby driving the mounting frame and the screen to move in the Y-axis direction as a whole.

[0023] 3. An angle adjustment mechanism is set up. The fourth motor drives the gear set and the turntable to rotate. The turntable is rotatably connected to the transition plate, and the turntable is connected to the mounting frame. The angle adjustment mechanism is set on the mounting plate, so that it can drive the mesh plate to shift in the horizontal direction, thereby forming a certain angle, thereby adjusting the position of the mesh plate in multiple directions, so that the mesh plate can be adaptively adjusted to match the gluing position of the battery cell and improve the gluing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional diagram of a screen printing device provided by the present application;

[0025] Figure 2 This is an exploded view of a screen printing device provided by the present application;

[0026] Figure 3 is an enlarged view of the X-axis adjustment mechanism in this application;

[0027] Figure 4 It is a structural diagram of the stencil in this application;

[0028] Figure 5 It is a cross-sectional view of the scraper assembly in this application.

[0029] Explanation of reference numerals: 1. mounting bracket; 2. first scraper; 3. second scraper; 4. screen; 5. X-axis adjustment mechanism; 6. Y-axis adjustment mechanism; 7. first screw rod; 8. first motor; 9. first bracket; 10. mounting plate; 11. first slider; 12. transition plate; 13. first slide rail; 14. second slider; 15. second screw rod; 16. second motor; 17. second bracket; 18. third slider; 19. second slide rail; 20. fourth slider; 21. angle adjustment mechanism; 22. fourth motor; 23. speed reducer; 24. U-shaped plate; 25. gear set; 26. Turntable; 27. Universal ball joint; 28. Third screw rod; 29. ​​Third motor; 30. Third bracket; 31. Fifth slider; 32. Third slide rail; 33. Sixth slider; 34. Assembly plate; 35. Fourth screw rod; 36. Eighth motor; 37. Fourth slide rail; 38. Seventh slider; 39. Fifth screw rod; 40. Sixth screw rod; 41. Fifth motor; 42. Sixth motor; 43. Frame; 44. Eighth slider; 45. Ninth slider; 46. First connecting plate; 47. Second connecting plate; 48. First cylinder; 49. Second cylinder; 50. Seventh motor. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In the utility model, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0036] The following is combined with Figure 1-5 , further explain this application in detail.

[0037] Reference Figure 1 and Figure 2 The screen printing device includes a mounting frame 1, a scraper assembly and a horizontally arranged screen plate 4, the screen plate 4 is connected to the mounting frame 1, and the screen plate 4 is provided with a plurality of glue holes, which correspond to the glue application points of the battery cell or battery string. The scraper assembly includes a first scraper 2 and a second scraper 3. The first scraper 2 and the second scraper 3 are located above the screen plate 4. The first scraper 2 and the second scraper 3 are used to scrape glue on the surface of the screen plate 4, so that the glue drips onto the corresponding glue application points through the glue application holes on the surface of the screen plate 4. The first scraper 2 and the second scraper 3 are both inclined, so that there is a certain angle between the first scraper 2 and the second scraper 3. Specifically, the distance between the first scraper 2 and the second scraper 3 gradually moves away from each other from top to bottom. By tilting the first scraper 2 and the second scraper 3, the contact area between the scraper and the screen plate 4 can be greater than that of the vertically arranged scraper during the scraping process. On the one hand, the service life of the scraper can be improved, and on the other hand, the amount of glue can be saved. The excess glue can be evenly applied to the top of the battery cell during the movement of the first scraper 2 and the second scraper 3.

[0038] An adjustment mechanism is provided at the bottom of the mounting frame 1. As a preferred embodiment, the adjustment mechanism includes an X-axis adjustment mechanism 5, a Y-axis adjustment mechanism 6 and an angle adjustment mechanism 21. The X-axis adjustment mechanism 5, the Y-axis adjustment mechanism 6 and the angle adjustment mechanism 21 are respectively used to adjust the position of the screen 4 on the X-axis and the Y-axis and the rotation angle of the screen 4 in the horizontal direction.

[0039] Reference Figure 2 and Figure 3The first and second sliders 14 are connected to each other in a sliding manner so as to enable the first slider 11 to move horizontally along the X-axis direction.

[0040] Reference Figure 2 and Figure 3 The Y-axis adjustment mechanism 6 includes a second slide rail 19, a second screw rod 15, a second bracket 17 for supporting the second screw rod 15, and a second motor 16 for driving the second screw rod 15 to rotate. The second bracket 17 is rotatably connected to the second screw rod 15. A third slider 18 is threadedly connected to the second screw rod 15, and the third slider 18 is fixed to the bottom of the mounting plate 10. The length direction of the second slide rail 19 and the second screw rod 15 are both arranged along the Y-axis. A fourth slider 20 is slidably connected to the second slide rail 19, and the fourth slider 20 is fixed to the bottom of the mounting plate 10. In the present application, two groups of second slide rails 19 and fourth sliders 20 are provided, and the two second slide rails 19 are parallel to each other and are parallel to the length direction of the second screw rod 15. It can be understood that the second slide rail 19 in the present application is fixed to an external frame (not shown in the figure).

[0041] Reference Figure 2 and Figure 3The angle adjustment mechanism 21 includes a fourth motor 22, a reducer 23, a U-shaped plate 24, a gear set 25 and a turntable 26. The output shaft of the fourth motor 22 is connected to the reducer 23. The housing of the fourth motor 22 is fixed to the housing of the reducer 23. As an practicable method, bolts can be used for fixing. The fourth motor 22 is located at the bottom of the mounting plate 10. The mounting plate 10 is provided with a through hole for the reducer 23 to pass through and move. The U-shaped plate 24 is fixed to the bottom of the transition plate 12. The gear set 25 is located at the bottom of the transition plate 12. The gear set 25 is located at the bottom of the transition plate 12. One of the gears in gear set 5 is mounted on the output shaft of reducer 23. Another gear in gear set 25 is in driving connection with turntable 26 to control its rotation. The top of turntable 26 is connected to mounting frame 1, which is in rotational connection with transition plate 12. Transition plate 12 is located at the bottom of mounting frame 1, with a gap between them. Transition plate 12 is provided with a plurality of universal balls 27. Each universal ball 27 has a base, which secures it to transition plate 12 via the base. The spherical surface of the universal ball 27 abuts the bottom of mounting frame 1. With this arrangement, the operation of fourth motor 22 can drive mounting frame 1 to rotate horizontally, thereby adjusting its angle.

[0042] Reference Figure 2 and Figure 4 The mounting frame 1 is also provided with a third bracket 30 and a third motor 29. The output shaft of the third motor 29 is connected to a third screw rod 28. The third screw rod 28 is vertically arranged. The third bracket 30 is rotatably connected to the third screw rod 28 to support the third screw rod 28. The third screw rod 28 is threadedly connected to a fifth slider 31. The fifth slider 31 is fixed to the side of the mesh plate 4 close to the mounting frame 1. The mounting frame 1 is provided with a vertically arranged third slide rail 32. The length direction of the third slide rail 32 is parallel to the third screw rod 28. The third slide rail 32 is slidably connected to the sixth slider 33. The sixth slider 33 is fixed to the side of the mesh plate 4 close to the mounting frame 1. Similarly, in the present application, two groups of third slide rails 32 and sixth sliders 33 are provided, and the two groups of third slide rails 32 are symmetrically arranged relative to the third screw rod 28. The mesh plate 4 is slidably set on the mounting frame 1 through the third slide rail 32 and the sixth slider 33, and can slide up and down along the Z-axis direction of the mounting frame 1. When the third motor 29 is working, it drives the third screw rod 28 to move, and cooperates with the third slide rail 32 and the sixth slider 33 to drive the mesh plate 4 to move.

[0043] Reference Figure 2 and Figure 4, the upper surface of the screen plate 4 is provided with a vertical moving component and a horizontal moving component for driving the first scraper 2 and the second scraper 3 to move. The horizontal moving component includes an assembly plate 34, a horizontally arranged fourth screw rod 35 and a fifth motor 41 for driving the fourth screw rod 35 to move. The assembly plate 34 is arranged above the screen plate 4, and the fifth motor 41 is fixed on the assembly plate 34. The output shaft of the fifth motor 41 is connected with the fourth screw rod 35. The assembly plate 34 is also provided with a fourth slide rail 37. The fourth slide rail 37 is parallel to the fourth screw rod 35. The fourth slide rail 37 is slidably connected with the seventh slider 38 and the vertical moving component. The bottom of the vertical moving component is connected to the first scraper 2 and the second scraper 3, so that when the horizontal moving component moves, the vertical moving component and the scraper assembly are synchronously driven to move horizontally, and then the scraper assembly is adjusted up and down by the vertical moving component.

[0044] Reference Figure 4 and Figure 5The vertical moving assembly includes a frame 43, a fifth vertically arranged screw rod 39, a sixth vertically arranged screw rod 40, a sixth motor 42 for driving the fifth screw rod 39 to rotate, and a seventh motor 50 for driving the sixth screw rod 40 to rotate. The sixth motor 42 and the seventh motor 50 are both fixed to the frame 43. The fifth screw rod 39 and the sixth screw rod 40 pass through the frame 43. An eighth slider 44 is rotatably provided on the fifth screw rod 39, and a ninth slider 45 is rotatably provided on the sixth screw rod 40. The eighth slider 44 and the ninth slider 45 are symmetrically provided in the frame 43, and the eighth slider 44 and the ninth slider 45 are symmetrically provided in the frame 43. It is connected to the frame 43 in a sliding manner along the Z-axis direction. During the movement of the fifth screw rod 39 and the sixth screw rod 40, the eighth slider 44 and the ninth slider 45 are respectively driven to move vertically along the frame 43. The bottom of the dam slider is connected to the first connecting plate 46, and the bottom of the ninth slider 45 is connected to the second connecting plate 47. The first connecting plate 46 is installed with a first cylinder 48, and the bottom of the second connecting plate 47 is installed with a second gun. The output shaft of the first cylinder 48 is connected to the first scraper 2, and the output shaft of the second cylinder 49 is connected to the second scraper 3. The first cylinder 48 and the second cylinder 49 are regulated by an electric proportional valve. The reason for this arrangement is that the motor and the screw drive the scraper to move downward, and the distance between the scraper and the screen 4 is fixed. Long-term use can easily cause a slight concave deformation in the middle of the screen 4. The distance between the scraper and each position of the screen 4 is different, resulting in uneven glue scraping. When the cylinder is set below the motor and the screw drive, the motor and the screw can be controlled first to make the scraper drop a certain distance in advance, leaving a small distance for the cylinder to adjust. For example, when the distance between the screen 4 and the scraper is small, the scraper can be slightly retracted upward, and when encountering a concave area of ​​the screen 4, the scraper can be slightly extended to maintain a constant distance between the scraper and the screen 4. In other words, the cylinder plays a role similar to a spring here, improving the quality of glue application in screen printing. It can be understood that in actual use, a visual camera and a controller can be used to automatically control each motor to make multiple adjustments in multiple directions according to the offset of each battery cell. This technical content is existing technology and this application will not go into details.

[0045] In summary, the present application, by providing an X-axis adjustment mechanism 5, a Y-axis adjustment mechanism 6, and an angle adjustment mechanism 21, can adjust the position of the mounting frame 1 relative to the transmission line, thereby corresponding to cells of different specifications, different positions, and different degrees of offset. This allows the screen printing mechanism to better correspond to the glue application position, thereby improving the accuracy of glue application. The above are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application shall be covered within the scope of protection of the present application.

Claims

1. A screen printing device, characterized in that: It includes a mounting frame, a scraper assembly and a horizontally arranged screen. The mesh plate is set on the mounting frame, and is provided with a plurality of glue application holes. The scraper assembly is located above the screen plate. An adjustment mechanism is provided at the bottom of the mounting frame, and the adjustment mechanism at least includes an X-axis adjustment mechanism and a Y-axis adjustment mechanism.

2. A screen printing device according to claim 1, characterized in that: The scraper assembly includes a first scraper and a second scraper. The first scraper and the second scraper are both arranged obliquely, and the first scraper and the second scraper gradually move away from each other from top to bottom.

3. The screen printing device according to claim 1, characterized in that: The X-axis adjustment mechanism includes a first screw rod, a first motor for driving the first screw rod to rotate, a first bracket and a mounting plate. The length direction of the first screw rod is arranged along the X-axis. The first bracket is arranged above the mounting plate to support the first screw rod. A first slider is threadedly connected to the first screw rod. A transition plate is installed above the first slider. A first slide rail is also provided on the mounting plate, and a second slider is slidably connected to the first slide rail.

4. The screen printing device according to claim 3, characterized in that: The Y-axis adjustment mechanism includes a second screw rod, a second motor for driving the second screw rod to rotate, and a second bracket for supporting the second screw rod. The length direction of the second screw rod is arranged along the Y-axis. A third slider is threadedly connected to the second screw rod, and the third slider is fixed to the bottom of the mounting plate. The Y-axis adjustment mechanism also includes a second slide rail, a fourth slider is slidably provided on the second slide rail, and the fourth slider is fixed to the bottom of the mounting plate. The second slide rail is parallel to the length direction of the second screw rod.

5. The screen printing device according to claim 3, characterized in that: The mounting frame is also provided with an angle adjustment mechanism, which includes a fourth motor, a reducer, a U-shaped plate, a gear set and a turntable. The fourth motor is connected to the reducer, and the reducer is fixed to the U-shaped plate. The U-shaped plate is arranged at the bottom of the transition plate. The output shaft of the reducer is connected to the gear set, and the gear set is connected to the turntable for controlling the rotation of the turntable. The turntable is connected to the mounting frame.

6. The screen printing device according to claim 5, characterized in that: The transition plate is arranged at the bottom of the mounting frame, with a gap between the transition plate and the mounting frame. A plurality of universal balls are arranged on the transition plate, and the spherical surfaces of the universal balls abut against the bottom surface of the mounting frame.

7. The screen printing device according to claim 1, characterized in that: The mounting frame is also provided with a vertically arranged third screw rod, a third motor for controlling the rotation of the third screw rod and a third bracket for supporting the third screw rod, a fifth slider is threadedly connected to the third screw rod, the fifth slider is fixed to the side of the mesh plate close to the mounting frame, a third slide rail is provided on the mounting frame, the third slide rail and the third screw rod are parallel to each other, a sixth slider is slidably connected to the third slide rail, and the sixth slider is fixed to the mesh plate.

8. The screen printing device according to claim 2, characterized in that: The screen is provided with a vertical moving component and a horizontal moving component for driving the scraper assembly to move. The horizontal moving component includes an assembly plate, a horizontally arranged fourth screw rod and a fifth motor for driving the fourth screw rod to move. The assembly plate is provided with a fourth slide rail, the fourth slide rail is parallel to the length direction of the fourth screw rod, and a seventh slider is slidably provided on the fourth slide rail, and the seventh slider is connected to the vertical moving component.

9. The screen printing device according to claim 8, characterized in that: The vertical moving assembly includes a vertically arranged fifth screw rod, a vertically arranged sixth screw rod, a sixth motor for driving the fifth screw rod to rotate, a seventh motor for driving the sixth screw rod to rotate, and a frame. The sixth motor and the seventh motor are both arranged on the frame. An eighth slider is rotatably arranged on the fifth screw rod, and a ninth slider is rotatably arranged on the sixth screw rod. The eighth slider and the ninth slider are both slidably connected to the frame. The eighth slider is used to drive the first scraper to rise and fall, and the ninth slider is used to drive the second scraper to rise and fall.

10. The screen printing device according to claim 9, characterized in that: The bottom of the eighth slider is transmission-connected to the first connecting plate, the bottom of the ninth slider is transmission-connected to the second connecting plate, the first connecting plate is installed with a first cylinder, the bottom of the second connecting plate is installed with a second cylinder, the output shaft of the first cylinder is connected to the first scraper, and the output shaft of the second cylinder is connected to the second scraper.

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