Automatic tension adjusting device for screen printing machine

Abstract

The utility model relates to a screen printing machine technical field especially is a kind of screen printing machine's screen plate tension automatic regulating device, including screen printing machine body, the upper side one end of screen printing machine body is fixedly installed with support protection box, the lateral protection box is slidably connected in support protection box one side outer wall, the lateral protection box one side outer wall is fixedly installed with protective housing, the protective housing one end outer wall is fixedly installed with motor, in the utility model, through design a kind of screen printing machine's screen plate tension automatic regulating device, utilize through motor drive gear and rack plate meshing transmission, drive two groups of concave positioning plate move towards or away from each other, can be adjusted screen plate four corners tension simultaneously, ensure that tension distribution is uniform, cooperate pressure sensor real-time monitoring clamping force, avoid because of clamping force too large damage screen plate or too small and lead to tension deficiency, effectively solve traditional manual regulating precision low, tension uneven problem, improve product pass rate.

Description

Technical Field

[0001] This utility model relates to the field of screen printing machine technology, and in particular to an automatic screen tension adjustment device for screen printing machines. Background Technology

[0002] As an important printing equipment, the printing quality of a screen printing machine is closely related to the stability of the screen tension.

[0003] In actual production, screen tension can decrease or fluctuate due to factors such as increased printing cycles, changes in ambient temperature and humidity, and screen material fatigue. This can lead to problems such as misregistration, uneven ink layer thickness, and blurred edges in the printed pattern, seriously affecting the product qualification rate. Traditional screen tension adjustment methods mainly rely on manual operation, where operators judge the tension state based on experience and use manual tools to adjust the tightness of the screen clamping device. This method is not only inaccurate and inefficient, but also difficult to achieve dynamic real-time adjustment, failing to meet the production needs of high-precision and automated printing.

[0004] To address the above problems, it is necessary to design an automatic screen tension adjustment device for screen printing machines to overcome these issues. Utility Model Content

[0005] The main objective of this invention is to provide an automatic tension adjustment device for screen printing machines, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An automatic screen tension adjustment device for a screen printing machine includes a screen printing machine body. A support and protective box is fixedly installed on one upper end of the screen printing machine body. A transverse protective box is slidably connected to one outer wall of the support and protective box. A protective shell is fixedly installed on one outer wall of the transverse protective box. A motor is fixedly installed on one outer wall of the protective shell. A first pulley and gears are fixedly installed on the output end of the motor. The number of gears is two. A second pulley is rotatably connected to the other end of the protective shell through a bearing. A drive shaft is drivingly connected to the first pulley and the second pulley. A drive shaft is fixedly connected to the middle of the second pulley. A third pulley is fixedly connected to one end of the drive shaft. The number of protective shells is two. A fourth pulley is rotatably connected to the inside of the other set of protective shells through a bearing.

[0007] As a preferred embodiment of this utility model, the third pulley and the fourth pulley are connected by a second transmission belt, and the middle part of the fourth pulley is fixedly connected to the middle part of another set of gears via a transmission shaft.

[0008] As a preferred embodiment of this utility model, grooves are respectively provided at both ends of the transverse protective box, and sliding grooves are respectively fixedly installed diagonally inside the transverse protective box, with sliding blocks slidably connected to the inner wall of the sliding grooves.

[0009] As a preferred embodiment of this utility model, a rack plate is fixedly installed on the upper side of the sliding block, the gear is meshed with the rack plate, the number of sliding blocks in a set of the sliding groove is two, and a connecting plate is fixedly connected to one side of a set of the sliding blocks.

[0010] As a preferred embodiment of this utility model, one end of the connecting plate passes through the groove and is connected to a connecting block. A concave positioning plate is fixedly installed on one side of the connecting block. An electric push rod is fixedly installed on the upper side of the concave positioning plate. A clamping plate is fixedly installed on one end of the electric push rod. A pressure sensor is fixedly installed on the upper side of the clamping plate. A transverse slide rail is fixedly installed in the middle of the interior of the transverse protective box.

[0011] As a preferred embodiment of this utility model, a slider is slidably connected to the outer wall of the transverse slide rail, a movable plate is fixedly installed at one end of the slider, and a connecting box is fixedly installed at one end of the movable plate.

[0012] As a preferred embodiment of this utility model, a scraper and an ink plate are installed at one end of the connecting box, the scraper is located at the front end of the ink plate, and a lead screw is rotatably connected inside the support and protective box via a bearing.

[0013] As a preferred embodiment of this utility model, a slide rail is fixedly installed on the inner wall of the support and protective box on both sides of the lead screw, and a moving block is provided on the slide rail and the outer wall of the lead screw, with one end of the moving block fixedly installed between the transverse protective box and the slide rail.

[0014] Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, an automatic tension adjustment device for screen printing machines is designed. By using a motor-driven gear meshing transmission with a rack plate, two sets of concave positioning plates move towards or away from each other, which can synchronously adjust the tension of the four corners of the screen to ensure uniform tension distribution. With the help of a pressure sensor to monitor the clamping force in real time, it avoids damage to the screen due to excessive clamping force or insufficient tension due to insufficient clamping force. It effectively solves the problems of low precision and uneven tension in traditional manual adjustment, and improves the product qualification rate.

[0015] 2. In this utility model, an automatic tension adjustment device for screen printing machines is designed. By integrating the tension adjustment device with the screen printing machine body, the reciprocating motion of the squeegee and ink plate is realized through the horizontal slide rail and slider. At the same time, the tension adjustment process and the printing action can be controlled in tandem. For example, it can be dynamically adjusted during the printing interval or according to real-time tension feedback, without the need to stop the machine, reducing production interruption time and significantly improving the continuity and efficiency of screen printing operations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the screen printing machine body of this utility model; Figure 2 This is a schematic diagram of the structure of the protective shell and the first transmission belt of this utility model; Figure 3 This is a structural schematic diagram of the support and protective box and the lead screw of this utility model; Figure 4 This is a schematic diagram of the structure of the transverse protective box and scraper of this utility model; Figure 5 This is a cross-sectional structural diagram of the horizontal protective box of this utility model; Figure 6 This is a schematic diagram of the concave positioning plate and electric push rod of this utility model.

[0017] In the diagram: 1. Screen printing machine body; 2. Support and protective box; 3. Horizontal protective box; 4. Motor; 5. Protective shell; 6. First pulley; 7. Gear; 8. First transmission belt; 9. Second pulley; 10. Transmission shaft; 11. Third pulley; 12. Second transmission belt; 13. Fourth pulley; 14. Lead screw; 15. Moving block; 16. Slide rail; 17. Moving plate; 18. Connecting box; 19. Scraper; 20. Ink plate; 21. Groove; 22. L-shaped connecting plate; 23. Connecting block; 24. Pressure sensor; 25. Concave positioning plate; 26. Electric push rod; 27. Clamping plate; 28. Slider; 29. ​​Sliding block; 30. Connecting plate; 31. Rack plate; 32. Horizontal slide rail; 33. Slide groove. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] like Figure 1-6As shown, an automatic screen tension adjustment device for a screen printing machine includes a screen printing machine body 1. A support and protective box 2 is fixedly installed on one upper end of the screen printing machine body 1. A transverse protective box 3 is slidably connected to one outer wall of the support and protective box 2. A protective shell 5 is fixedly installed on one outer wall of the transverse protective box 3. A motor 4 is fixedly installed on one outer wall of the protective shell 5. A first pulley 6 and a gear 7 are fixedly installed at the output end of the motor 4. Two sets of gears 7 are provided. A second pulley 9 is rotatably connected to the other end of the protective shell 5 through a bearing. A drive shaft 10 is drivenly connected to the first pulley 6 and the second pulley 9. The drive shaft 10 is fixedly connected to the middle of the second pulley 9. A third pulley 11 is fixedly connected to one end of the drive shaft 10. Two sets of protective shells 5 are provided. A fourth pulley 13 is rotatably connected to the inside of the other set of protective shells 5 through a bearing.

[0020] Please see the appendix Figure 1 Appendix Figure 2 Appendix Figure 5 and attached Figure 6 As shown, the third pulley 11 and the fourth pulley 13 are connected by a second transmission belt 12. The middle of the fourth pulley 13 is fixedly connected to the middle of another set of gears 7 via a transmission shaft. The transverse protective box 3 has grooves 21 at both ends. The transverse protective box 3 has diagonally fixed sliding grooves 33 inside. The inner wall of the sliding groove 33 is slidably connected to a sliding block 29. A rack plate 31 is fixedly installed on the upper side of the sliding block 29. The gear 7 is meshed with the rack plate 31. There are two sets of sliding blocks 29 in one set of sliding grooves 33. A connecting plate 30 is fixedly connected to one side of one set of sliding blocks 29. One end of the connecting plate 30 passes through the groove 21 and is connected to a connecting block 23. A concave positioning plate 25 is fixedly installed on one side of the connecting block 23. The upper side of the concave positioning plate 25 is fixedly installed with a connecting block 23. An electric push rod 26 is installed, with a clamping plate 27 fixedly installed at one end of the electric push rod 26. A pressure sensor 24 is fixedly installed on the upper side of the clamping plate 27. A transverse slide rail 32 is fixedly installed in the middle of the interior of the transverse protective box 3. A slider 28 is slidably connected to the outer wall of the transverse slide rail 32. A moving plate 17 is fixedly installed at one end of the slider 28. A connecting box 18 is fixedly installed at one end of the moving plate 17. A scraper 19 and an ink plate 20 are installed at one end of the connecting box 18. The scraper 19 is located at the front end of the ink plate 20. A lead screw 14 is rotatably connected to the interior of the support protective box 2 through a bearing. A slide rail 16 is fixedly installed on the inner wall of the support protective box 2 on both sides of the lead screw 14. A moving block 15 is provided on the outer wall of the slide rail 16 and the lead screw 14. One end of the moving block 15 is fixedly installed between the transverse protective box 3. Among them, the motor 4 is a forward and reverse motor, and is equipped with two sets of rack plates 31 and two sets of gears 7. One set of rack plates 31 meshes with the lower outer wall of one set of gears 7, and the other set of rack plates 31 meshes with the upper side of the other set of gears 7, which facilitates the two sets of concave positioning plates 25 to move in opposite directions or towards each other. The screen printing machine body 1 has a motor installed inside, which is not shown in the figure, to facilitate the operation of the lead screw 14. Among them, the concave positioning plate 25 clamps the outer frame of the screen, and the clamping force is adjusted by the electric push rod 26. The tension of the screen is changed in conjunction with the tension adjustment mechanism. The clamping plate 27 is integrated with the pressure sensor to monitor the clamping force in real time and avoid overload damage to the screen. Rubber pads are attached to the inner side of the concave positioning plate 25 and the bottom of the clamping plate 27 to increase friction and prevent the screen from being scratched.

[0021] The working process of this utility model is as follows: Using the automatic screen tension adjustment device designed for a screen printing machine, the screen is placed between two sets of concave positioning plates 25. An external controller controls the extension and retraction of the electric push rod 26 at the top of the concave positioning plate 25, which in turn clamps and fixes the screen with a clamping plate 27 at one end. Anti-slip pads (not shown in the figure) are attached to both the clamping plate 27 and the inner wall of the concave positioning plate 25 to reinforce the screen and prevent damage. A pressure sensor 24 detects the clamping force to prevent damage. The motor (not shown in the figure) inside the screen printing machine body 1, which drives the lead screw 14, is activated. The slide rails 16 on both sides of the lead screw 14 move in conjunction with the moving block 15, thereby adjusting the height of the transverse protective box 3. An external controller controls the slider 28 to move along the outer wall of the transverse slide rail 32, causing the scraper 19 and ink plate 20 to reciprocate on the screen surface, facilitating screen printing operations. The external controller also controls… The motor 4 on one side of the outer wall of the transverse protective box 3 operates, driving the first pulley 6 and gear 7 installed at the output end to rotate. While the first pulley 6 rotates, it drives the second pulley 9 to rotate through the first transmission belt 8. The second pulley 9 rotates simultaneously, driving the transmission shaft 10 to rotate. The transmission shaft 10 drives the third pulley 11 to rotate. The third pulley 11 drives the fourth pulley 13 to rotate through the second transmission belt 12. The fourth pulley 13 drives another set of gears 7 to rotate. The gear 7 meshes with the rack plate 31 on the sliding block 29, causing the rack plate 31 to slide along the inner wall of the slide groove 33 through the sliding block 29. While moving, it drives a set of connecting plates 30 installed on one side of the sliding block 29 to slide along the inner wall of the groove 21, thereby driving the connecting block 23 connected to one end of the connecting plate 30 to move, and then driving the L-shaped connecting plate 22 to move. This facilitates the movement of two sets of concave positioning plates 25 towards each other, thereby adjusting the tension of the screen and making it easier to operate and use.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic screen tension adjustment device for a screen printing machine, comprising a screen printing machine body (1), characterized in that: A support protective box (2) is fixedly installed on one side of the upper end of the screen printing machine body (1). A transverse protective box (3) is slidably connected to one side of the outer wall of the support protective box (2). A protective shell (5) is fixedly installed on one side of the outer wall of the transverse protective box (3). A motor (4) is fixedly installed on one side of the outer wall of the protective shell (5). A first pulley (6) and a gear (7) are fixedly installed at the output end of the motor (4). There are two sets of gears (7). A second pulley (9) is rotatably connected to the other end of the protective shell (5) through a bearing. A drive shaft (10) is connected to the first pulley (6) and the second pulley (9). A drive shaft (10) is fixedly connected to the middle of the second pulley (9). A third pulley (11) is fixedly connected to one end of the drive shaft (10). There are two sets of protective shells (5). A fourth pulley (13) is rotatably connected to the other set of protective shells (5) through a bearing.

2. The automatic screen tension adjustment device for a screen printing machine according to claim 1, characterized in that: The third pulley (11) and the fourth pulley (13) are connected by a second transmission belt (12), and the middle part of the fourth pulley (13) is fixedly connected to the middle part of another set of gears (7) through a transmission shaft.

3. The automatic screen tension adjustment device for a screen printing machine according to claim 2, characterized in that: The transverse protective box (3) has grooves (21) at both ends, and sliding grooves (33) are fixedly installed diagonally inside the transverse protective box (3). Sliding blocks (29) are slidably connected to the inner wall of the sliding grooves (33).

4. The automatic screen tension adjustment device for a screen printing machine according to claim 3, characterized in that: A rack plate (31) is fixedly installed on the upper side of the sliding block (29), and the gear (7) meshes with the rack plate (31). The sliding block (29) set in a set of the sliding groove (33) consists of two sets, and a connecting plate (30) is fixedly connected to one side of a set of the sliding block (29).

5. The automatic screen tension adjustment device for a screen printing machine according to claim 4, characterized in that: One end of the connecting plate (30) passes through the groove (21) and is connected to the connecting block (23). A concave positioning plate (25) is fixedly installed on one side of the connecting block (23). An electric push rod (26) is fixedly installed on the upper side of the concave positioning plate (25). A clamping plate (27) is fixedly installed on one end of the electric push rod (26). A pressure sensor (24) is fixedly installed on the upper side of the clamping plate (27). A transverse slide rail (32) is fixedly installed in the middle of the interior of the transverse protective box (3).

6. The automatic screen tension adjustment device for a screen printing machine according to claim 5, characterized in that: The outer wall of the transverse slide rail (32) is slidably connected to a slider (28), a movable plate (17) is fixedly installed at one end of the slider (28), and a connecting box (18) is fixedly installed at one end of the movable plate (17).

7. The automatic screen tension adjustment device for a screen printing machine according to claim 6, characterized in that: A scraper (19) and an ink plate (20) are installed at one end of the connecting box (18). The scraper (19) is located at the front end of the ink plate (20). A lead screw (14) is rotatably connected inside the support and protection box (2) through a bearing.

8. The automatic screen tension adjustment device for a screen printing machine according to claim 7, characterized in that: Slide rails (16) are fixedly installed on the inner walls of the support and protection box (2) on both sides of the lead screw (14). A moving block (15) is provided on the outer wall of the slide rail (16) and the lead screw (14). One end of the moving block (15) is fixedly installed between the transverse protection box (3).

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