A screen printing tension control mechanism

Abstract

This utility model relates to the field of screen printing technology, specifically a screen printing tension control mechanism, comprising: a support frame and a movable plate. The support frame has symmetrically arranged grooves on its inner walls on both sides. Tension-resistant rings are fixedly connected at equal intervals at the four corners of the printing screen. The movable plate is movably engaged within the grooves at both ends. Two movable plates are symmetrically arranged. A tension assembly is installed within the support frame. Horizontal bidirectional tension adjustment is achieved by driving the movable plate with an adjusting screw. Diagonal tension compensation is achieved through the cooperation of the lever, guide plate, and cross groove. Vertical support from the support plate and pressure plate prevents unidirectional tension. Simultaneously, the pressure plate, in conjunction with the support plate, enhances the fit between the screen and the support plate through mechanical compression, preventing vertical deformation of the screen caused by the squeegee during printing, thus ensuring the screen is in a state of omnidirectional balanced tension.

Description

Technical Field

[0001] This utility model relates to the field of screen printing technology, specifically a screen printing tension control mechanism. Background Technology

[0002] Screen printing, also known as stencil printing, involves creating perforations in the printing area, while the non-printing areas remain opaque. Screen printing produces thick, vibrant inks and is primarily controlled by the size of the perforations on the printing plate. It is a simple process. Screen printing consists of five main elements: the screen printing plate, the squeegee, the ink, the printing table, and the substrate.

[0003] The existing Chinese patent document CN219256753U discloses a high-tension mesh printing screen, including a main frame and a printing screen. A movable bracket is connected to one side of the frame. Mesh clamping structures are provided on the movable bracket and on the side of the main frame away from the movable bracket. The printing screen is located at the bottom of the movable bracket. The two ends of the printing screen are clamped and fixed by clamping strips provided on the main frame and the movable bracket, respectively. This utility model clamps and fixes the two ends of the printing screen by clamping strips provided on the main frame and the movable bracket, respectively. The two sides of the printing screen are provided with tensile-resistant edges. The tensile-resistant edges are provided with fixing pin holes that are evenly spaced. When clamped, the fixing pins provided at the bottom of the clamping strips are engaged with the fixing pin holes provided on the tensile-resistant edges, which can effectively clamp and fix the printing screen. With the limiting sliding pins limiting the guide rollers, the installation of the printing screen is completed, and the installation and disassembly are convenient.

[0004] However, the above solutions, which use horizontal telescopic mechanisms or pressure components to adjust tension, can only address the problem of insufficient or uneven tension distribution in the horizontal direction. These technologies do not consider issues such as vertical screen sagging or diagonal stress concentration, resulting in the screen being in an unbalanced state of "unidirectional tension and multi-directional relaxation." The repeated squeezing by the squeegee during printing exacerbates this multi-dimensional stress imbalance, thereby reducing printing accuracy and screen lifespan.

[0005] It can only adjust and control the tension in the horizontal direction, and needs improvement and optimization. Utility Model Content

[0006] The purpose of this invention is to provide a screen printing tension control mechanism to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a screen printing tension control mechanism, comprising: a support frame and a movable plate, wherein symmetrical grooves are provided on the inner walls of both sides of the support frame, and anti-tension rings are fixedly connected at equal intervals at the four corners of the printing screen, and the two ends of the movable plate are movably engaged in the grooves; two movable plates are symmetrically arranged, and a tension component is provided inside the support frame.

[0008] Preferably, the tension assembly includes an adjusting screw, a cross groove, a push pin, a guide plate, a clamping nut, a support plate, and a pressure plate. There are two adjusting screws, which are symmetrically threaded and connected on the two side walls of the support frame. The ends of the adjusting screws are rotatably connected to the movable plate.

[0009] Preferably, a cross groove is provided on the end wall of the movable plate, and two movable disks are symmetrically and movably engaged in the horizontal groove of the cross groove. A pin is fixedly sleeved on the movable disk, and the two ends of the pin extend out of the vertical groove of the cross groove. Guide plates are equidistantly connected at the four corners of the bottom end of the support frame, with the ends of the guide plates facing the center of the support frame. A guide groove is provided on the side wall of the guide plate, and the bottom end of the pin is movably engaged in the guide groove.

[0010] Preferably, the top of the push pin is threaded, the top of the push pin is inserted into the tensile ring, the top of the push pin is threaded and provided with a tightening nut, the bottom end of the tightening nut abuts against the tensile ring, the two ends of the support plate are movably snapped into the slide groove, and the support plate is located between the two moving plates.

[0011] Preferably, the top of the tray contacts the bottom of the printing screen, and a pressure plate is rotatably connected to one side of the top of the tray. Anti-slip protrusions are equidistantly arranged on the bottom wall of the pressure plate, and the bottom ends of the anti-slip protrusions press against the printing screen.

[0012] Preferably, a positioning post is connected to one end of the pressure plate, and positioning grooves are symmetrically opened on the side wall of the support frame. The positioning post is snapped into the positioning groove, and a locking block is symmetrically connected to the side wall of the support frame. A hand-tightening nut is threadedly connected to the end of the positioning post, and a retaining ring is connected to the side wall of the hand-tightening nut. The inner wall of the retaining ring is fitted with the locking block.

[0013] Compared with the prior art, the beneficial effects of this utility model are: Horizontal bidirectional tension adjustment is achieved by adjusting the screw to drive the moving plate. Diagonal tension compensation is achieved by combining the paddle, guide plate, and cross groove. Furthermore, the vertical support of the support plate and pressure plate prevents unidirectional tension. At the same time, the pressure plate and support plate work together to enhance the fit between the screen and the support plate through mechanical compression, avoiding vertical deformation of the screen caused by the squeegee during printing, thus keeping the screen in a state of omnidirectional balanced tension. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 A magnified view of a portion of the image; Figure 3 This is a schematic diagram of the support frame structure connection of this utility model; Figure 4 This is a bottom view of the support frame structure of this utility model; Figure 5This is a partially exploded cross-sectional view of the movable plate structure of this utility model; Figure 6 This is a schematic diagram of the tray structure connection of this utility model; Figure 7 This is a schematic diagram of the connection of the pressure plate structure of this utility model.

[0015] In the diagram: 1. Support frame; 2. Slide groove; 3. Printing screen; 4. Tensile ring; 5. Moving plate; 6. Adjusting screw; 7. Cross groove; 8. Moving disc; 9. Pulley; 10. Guide plate; 11. Guide groove; 12. Tightening nut; 13. Support plate; 14. Pressure plate; 15. Anti-slip protrusion; 16. Positioning post; 17. Positioning groove; 18. Locking block; 19. Hand-tightening nut; 20. Snap ring. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] Please see Figures 1-7 This utility model provides a technical solution: a screen printing tension control mechanism, including: a support frame 1 and a movable plate 5. The inner walls on both sides of the support frame 1 are symmetrically provided with grooves 2. Tension rings 4 are fixedly connected at equal intervals at the four corners of the printing screen 3. The two ends of the movable plate 5 are movably snapped into the grooves 2. Two movable plates 5 are symmetrically provided. Tension components are provided in the support frame 1.

[0018] The support frame 1 serves as the overall installation base, with symmetrical grooves 2 on both inner walls for guiding the moving plate 5 and the support plate 13. The printing screen 3 has anti-tension rings 4 fixedly connected at equal intervals at its four corners for cooperating with the push pins 9 of the tension assembly to transmit tension.

[0019] The tension assembly has two adjusting screws 6, which are symmetrically threaded on both sides of the support frame 1, and the ends of the adjusting screws 6 are rotatably connected to the moving plate 5.

[0020] The adjusting screw 6 is symmetrically threaded to both sides of the support frame 1, and its end is rotatably connected to the moving plate 5 to drive the moving plate 5 to move horizontally.

[0021] The movable plate 5 has a cross groove 7 on its end wall. Two movable disks 8 are symmetrically and movably engaged in the horizontal groove of the cross groove 7. The movable disks 8 are fixedly fitted with push pins 9. The two ends of the push pins 9 extend out of the vertical groove of the cross groove 7. Guide plates 10 are equidistantly connected at the four corners of the bottom of the support frame 1. The ends of the guide plates 10 face the center of the support frame 1. Guide grooves 11 are opened on the side wall of the guide plates 10. The bottom ends of the push pins 9 are movably engaged in the guide grooves 11.

[0022] The deflector 9 is fixedly sleeved on the movable disk 8, with both ends extending out of the vertical grooves of the cross groove 7, and the bottom end is movably engaged in the guide groove 11 of the guide plate 10, which is used to guide the deflector 9 to move towards the corner of the support frame 1.

[0023] The top of the push post 9 is threaded, and the top of the push post 9 is inserted into the tensile ring 4. The top of the push post 9 is threadedly connected to a tightening nut 12, and the bottom of the tightening nut 12 tightens the tensile ring 4. The two ends of the support plate 13 are movably snapped into the slide groove 2, and the support plate 13 is located between the two moving plates 5.

[0024] The top of the pusher 9 is threaded and inserted into the tensile ring 4. The threaded connection has a locking nut 12 for locking the tensile ring.

[0025] The top of the tray 13 contacts the bottom of the printing screen 3. A pressure plate 14 is rotatably connected to one side of the top of the tray 13. Anti-slip protrusions 15 are equidistantly arranged on the bottom wall of the pressure plate 14, and the bottom ends of the anti-slip protrusions 15 press against the printing screen 3.

[0026] The pressure plate 14 is rotatably connected to one side of the top of the tray 13. Anti-slip protrusions 15 are equidistantly arranged on the bottom wall to enhance the pressing friction. The mechanical extrusion enhances the fit between the printing screen 3 and the tray 13, and avoids vertical deformation of the printing screen 3 caused by the extrusion of the squeegee during printing.

[0027] One end of the pressure plate 14 is connected to a positioning post 16. The side wall of the support frame 1 is symmetrically provided with positioning grooves 17. The positioning post 16 is snapped into the positioning groove 17. The side wall of the support frame 1 is symmetrically connected with a locking block 18. The end of the positioning post 16 is threadedly connected with a hand-tightening nut 19. The side wall of the hand-tightening nut 19 is connected with a retaining ring 20. The inner wall of the retaining ring 20 is fitted with the locking block 18.

[0028] The positioning post 16 is inserted into the positioning groove 17 on the side wall of the support frame 1, and the hand-tightened nut 19 is threaded to the end of the positioning post 16. The retaining ring 20 connected to the side wall cooperates with the retaining block 18 to lock the pressure plate 14.

[0029] Working principle: The tensile rings 4 at the four corners of the printing screen 3 are respectively fitted onto the tops of the four pivot pins 9, and the locking nuts 12 are tightened to fix the tensile rings 4. Rotate the adjusting screws 6 on both sides of the support frame 1. Since the adjusting screws 6 are threadedly connected to the support frame 1 and their ends are rotatably connected to the moving plate 5, the rotational motion of the screws is converted into the horizontal linear motion of the moving plate 5 along the slide groove 2. When the moving plate 5 moves, the moving disk 8 in the cross groove 7 on its end wall slides synchronously with the guide of the slide groove 2. The pivot pins 9 on the moving disk 8 move along the guide grooves 11 of the corner guide plate 10 of the support frame 1, which drives the tensile rings 4 inserted at the top of the pivot pins 9 to generate diagonal lines. The tension in the direction; through the bidirectional limiting of the horizontal and vertical grooves of the cross groove 7, the moving plate 8 can adapt to the displacement in the diagonal direction while moving horizontally, offsetting the stress concentration in the diagonal direction of the screen, realizing the tension balance in the diagonal direction, and avoiding unidirectional tension; the support plate 13 is attached to the bottom of the printing screen 3, and the pressure plate 14 is rotated so that the anti-slip protrusions 15 press the printing screen 3, the positioning post 16 is inserted into the positioning groove 17, and the hand-tightening nut 19 is tightened so that the inner wall of the retaining ring 20 is attached to the retaining block 18, thereby realizing the locking and fixing of the pressure plate 14; further locking the tension state of the four corners, ensuring the tension is stable throughout the printing process, and avoiding stress imbalance.

[0030] 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. A screen printing tension control mechanism comprising: Support frame (1) and movable plate (5). Slide grooves (2) are symmetrically opened on the inner walls of both sides of the support frame (1). Tensile rings (4) are fixedly connected at equal intervals at the four corners of the printing screen (3). The two ends of the movable plate (5) are movably snapped into the slide grooves (2). The feature is that: there are two symmetrically arranged movable plates (5), and a tension component is provided in the support frame (1).

2. A screen printing tension control mechanism according to claim 1, wherein: The tension assembly includes an adjusting screw (6), a cross groove (7), a push pin (9), a guide plate (10), a clamping nut (12), a support plate (13), and a pressure plate (14). There are two adjusting screws (6), which are symmetrically threaded on both sides of the support frame (1). The ends of the adjusting screws (6) are rotatably connected to the moving plate (5).

3. A screen printing tension control mechanism according to claim 2, wherein: The movable plate (5) has a cross groove (7) on its end wall. Two movable disks (8) are symmetrically and movably engaged in the horizontal groove of the cross groove (7). The movable disks (8) are fixedly fitted with push pins (9). The two ends of the push pins (9) extend out of the vertical groove of the cross groove (7). Guide plates (10) are equidistantly connected at the four corners of the bottom of the support frame (1). The ends of the guide plates (10) face the center of the support frame (1). Guide grooves (11) are opened on the side wall of the guide plates (10). The bottom end of the push pins (9) is movably engaged in the guide grooves (11).

4. A screen printing tension control mechanism according to claim 3, wherein: The top of the pusher (9) is threaded, and the top of the pusher (9) is inserted into the tensile ring (4). The top of the pusher (9) is threaded with a tightening nut (12), and the bottom of the tightening nut (12) abuts against the tensile ring (4). The two ends of the support plate (13) are movably snapped into the slide groove (2), and the support plate (13) is located between the two moving plates (5).

5. A screen printing tension control mechanism according to claim 4, wherein: The top of the tray (13) contacts the bottom of the printing screen (3), and a pressure plate (14) is rotatably connected to one side of the top of the tray (13). Anti-slip protrusions (15) are equidistantly arranged on the bottom wall of the pressure plate (14), and the bottom ends of the anti-slip protrusions (15) press against the printing screen (3).

6. A screen printing tension control mechanism according to claim 5, wherein: One end of the pressure plate (14) is connected to a positioning post (16), and the side wall of the support frame (1) is symmetrically provided with positioning grooves (17). The positioning post (16) is snapped into the positioning groove (17). The side wall of the support frame (1) is symmetrically connected with a locking block (18). The end of the positioning post (16) is threadedly connected with a hand-tightening nut (19). The side wall of the hand-tightening nut (19) is connected with a retaining ring (20). The inner wall of the retaining ring (20) is fitted with the locking block (18).

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