Screen printing device

Abstract

The utility model belongs to the field of silk-screen printing, and particularly relates to a silk-screen printing device which solves the problems that in the prior art, installation and replacement of a silk-screen plate are tedious, position adjustment needs manual adjustment, and deviation and errors are prone to being generated, and the silk-screen printing device comprises a printing table, a connecting plate, two unfolding plates and a clamping mechanism. Through mutual cooperation of the lifting assembly, the transverse moving assembly and the clamping assembly, not only can a printing part be driven to adjust the height, but also the screen printing plate can be adjusted in a lifting mode, and the clamping mechanism can be conveniently adjusted through the transverse assembly to clamp and fix the screen printing plates of different sizes. And the screen printing plate can be conveniently pressed and clamped through the clamping mechanism, so that the two sides of the screen printing plate can be simultaneously clamped and fixed in a pressing mode, the stability of the screen printing plate is improved, the screen printing plate is prevented from shaking during printing work, the screen printing plate can be conveniently replaced and detached, and the workload of workers is greatly reduced.

Description

Technical Field

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

[0002] Screen printing consists of five key elements: the screen printing plate, squeegee, ink, printing table, and substrate. Printing is performed based on the principle that the pores in the image portion of the screen printing plate are permeable to ink, while the pores in the non-image portion are impermeable. However, during the printing process, the removal, replacement, clamping, and position adjustment of different screen plates according to the printed design are crucial to ensuring the quality of the printed product.

[0003] The authorization announcement number in the prior art is: CN219544269U, and the name is a screen printing device. The device proposed in the patent document can print on flat substrates, and the roller can support the printing of cylindrical substrates. The sliding device is convenient for left and right adjustment during printing, and it is also convenient for replacing the printing screen. The cross bar can drive the entire device to adjust the height during printing. However, in actual use, although the device can facilitate height and left and right adjustment printing, it is more cumbersome and time-consuming and labor-intensive to install and replace the screen plate, and the position of the nut needs to be adjusted frequently when adjusting up and down and left and right, which puts a lot of workload on the staff, and manual operation is prone to errors, and its practicality needs to be improved. Utility Model Content

[0004] The technical problem solved by the utility model is that the installation and replacement of the screen plate in the prior art are relatively cumbersome and the position adjustment requires manual adjustment, which is prone to offset and error. A screen printing device is provided.

[0005] In order to solve the above technical problems, the utility model provides a screen printing device, including a printing table, a connecting plate, two unfolding plates and a clamping mechanism. The connecting plate is provided with a lifting component connected to the printing table outside, and the lifting component is used to drive the connecting plate to move up and down; the unfolding plate is provided with a horizontal component connected to the connecting plate outside, and the horizontal component is used to drive the unfolding plate to move horizontally; the clamping mechanism is used to clamp and fix the screen plate.

[0006] Preferably, the lifting assembly includes a U-shaped lifting plate fixedly connected to the rear side of the connecting plate, and a U-shaped mounting frame for limiting the position of the U-shaped lifting plate is fixedly connected to the back of the printing table. The front of the U-shaped mounting frame is provided with two first guide grooves for guiding the U-shaped lifting plate, and the inner wall of the first guide groove is slidably connected to the outer surface of the U-shaped lifting plate. By providing the first guide groove, it is better to facilitate the limiting and lifting of the U-shaped lifting plate, and it is also easier to facilitate the lifting and lowering of the connecting plate by subsequent driving components.

[0007] Preferably, the lifting mechanism further includes a servo motor fixedly connected to the bottom surface of the U-shaped mounting frame, and the output shaft of the servo motor rotates through the bottom surface of the U-shaped mounting frame and is fixedly connected to a first threaded rod for driving the U-shaped lifting plate to move up and down, the outer surface of the first threaded rod is threadedly connected to the reserved hole on the bottom surface of the U-shaped lifting plate, and the upper end of the first threaded rod is rotatably connected to the inner top wall of the U-shaped mounting frame, and the inner bottom wall of the U-shaped mounting frame is fixedly connected to two sliding rods for limiting the lifting and lowering of the U-shaped lifting plate. By arranging a servo motor, the output shaft of the servo motor drives the first threaded rod to rotate at the U-shaped mounting frame, and the first threaded rod can cooperate with the thread of the U-shaped lifting plate during the rotation process, thereby driving the U-shaped lifting plate to move up and down, and then driving the connecting plate to move up and down.

[0008] Preferably, the lateral component includes two second guide grooves opened on the front side of the connecting plate, and the back sides of the two expansion plates are fixedly connected with two connecting screw rings for driving the expansion plates to move horizontally, and the outer surfaces of the connecting ends of the connecting screw rings are slidably connected to the inner walls of the second guide grooves. The annular rings of the two connecting screw rings are away from the expansion plates and are located outside the connecting plate. By setting the second guide grooves, it is possible to better facilitate the limited sliding of the connecting screw rings, thereby facilitating the stability of the expansion plates driven by the connecting screw rings during horizontal adjustment.

[0009] Preferably, the horizontal component also includes a dual-output shaft motor fixedly connected to the back of the connecting plate, the two output shafts of the dual-output shaft motor are fixedly connected to a second threaded rod for driving the connecting screw ring to move horizontally, and the back of the connecting plate is fixedly connected to two fixed plates for limiting the rotation of the second threaded rod. By setting up a dual-output shaft motor, the two output shafts of the dual-output shaft motor drive the two second threaded rods to rotate, and the second threaded rod cooperates with the connecting screw ring thread during rotation, and the thread directions of the two second threaded rods are opposite, so that it is easy to drive the two connecting screw rings to move relative to each other, so that it is easy to drive the two expansion plates to move in opposite directions, and then it is easy to drive the clamping mechanism to expand and close, so as to clamp screen plates of different sizes.

[0010] Preferably, the clamping mechanism includes an L-shaped fixing plate fixedly connected to one end away from the two unfolding plates, and two electric push rods are installed on the upper surface of the L-shaped fixing plate. The output ends of the two groups of electric push rods slide through the L-shaped fixing plate on the same side and are fixedly connected to the pushing plate. The side surfaces of the two pushing plates close to each other are fixedly connected to the L-shaped clamping plates. By setting the electric push rod, the output end of the electric push rod can push the pushing plate to move up and down, thereby driving the L-shaped clamping plate to move up and down, thereby facilitating the adjustment of the distance between the L-shaped clamping plate 1304 and the printing body 17 when the screen is installed.

[0011] Preferably, the inner walls of the two L-shaped clamping plates are hinged with a pressure plate through a pin shaft, the outer surfaces of the L-shaped fixing plates are fixedly connected to two convex plates, and the bottom surfaces of the convex plates are hinged with a transmission plate for pushing the pressure plate to clamp and fix the screen, the back sides of the two L-shaped fixing plates are fixedly connected to a limiting plate, and the outer surfaces of the limiting plates are fixedly connected to a stabilizing rod that is slidably connected to a reserved hole on the outer surface of the connecting plate, and the side of the pressure plate in contact with the screen is provided with an anti-slip strip, which can further enhance the clamping and fixation of the screen to prevent the screen from shaking during printing.

[0012] Preferably, the front of the connecting plate is fixedly connected to a slide rail, and the outer surface of the slide rail is installed with a printing body for printing products, the lower part of the printing body is provided with a silk screen body clamped and fixed by a clamping mechanism, and the four corners of the bottom surface of the printing table are fixedly connected with support legs for supporting the printing table, and the lower ends of the support legs are fixedly connected with foot pads. By setting up the slide rail, it is convenient to drive the printing body to slide under the limiting support of the slide rail through a mechanical arm or a starting component, so that the printing body can scrape the ink on the silk screen body back and forth, so that the ink can print the product through the silk screen body.

[0013] Compared with the related art, the present invention has the following beneficial effects:

[0014] 1. The utility model sets a lifting component, a lateral moving component and a clamping component to cooperate with each other, which not only makes it easy to drive the printing component to adjust the height, thereby making it easy to lift and lower the screen plate, but also makes it easy to clamp and fix screen plates of different sizes by adjusting the clamping mechanism through the lateral component. The screen plate can also be pressed down and clamped by the clamping mechanism, so that both sides of the screen plate can be clamped and fixed at the same time by pressing down, thereby improving the stability of the screen plate and preventing the screen plate from shaking during printing. It is also easy to replace and disassemble the screen plate, greatly reducing the workload of the staff, and making it easy to print ink on the product through subsequent printing components.

[0015] The U-shaped lifting plate is convenient to install and can be easily adjusted, and the lifting mechanism can be easily adjusted, so that the lifting mechanism can be easily adjusted.

[0016] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the overall device of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the lifting assembly of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the clamping mechanism of the utility model;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the horizontal component of the utility model;

[0022] Figure 5 For this utility model Figure 3 A local enlarged schematic diagram of point A in the middle.

[0023] Numbers in the figure:

[0024] 1. Printing table; 2. U-shaped mounting frame; 3. Servo motor; 4. First threaded rod; 5. First guide groove; 6. U-shaped lifting plate; 7. Connecting plate; 8. Dual-output shaft motor; 9. Second threaded rod; 10. Second guide groove; 11. Connecting screw ring; 12. Expanding plate; 13. Clamping mechanism; 1301. L-shaped fixing plate; 1302. Electric push rod; 1303. Pushing plate; 1304. L-shaped clamping plate; 1305. Pressing plate; 1306. Convex plate; 1307. Transmission plate; 1308. Limiting plate; 1309. Stabilizing bar; 14. Sliding rod; 15. Fixing plate; 16. Slide rail; 17. Printing body; 18. Silk screen body; 19. Support leg; 20. Foot pad. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-5 A screen printing device includes a printing table 1, a connecting plate 7, two unfolding plates 12 and a clamping mechanism 13. The connecting plate 7 is provided with a lifting component connected to the printing table 1, and the lifting component is used to drive the connecting plate 7 to move up and down.

[0027] refer to Figures 1 to 5 The setting of the lifting component can facilitate the lifting movement of the printing components, thereby adjusting the distance between the entire printing device and the printing table 1, facilitating the transmission of printed products at the bottom of the printing device, and greatly improving the practicality of the entire device.

[0028] The lifting assembly includes a U-shaped lifting plate 6 fixedly connected to the rear side of the connecting plate 7, and a U-shaped mounting frame 2 for limiting the U-shaped lifting plate 6 is fixedly connected to the back of the printing table 1. The front of the U-shaped mounting frame 2 is provided with two first guide grooves 5 for guiding the U-shaped lifting plate 6, and the inner wall of the first guide groove 5 is slidably connected to the outer surface of the U-shaped lifting plate 6.

[0029] By setting the first guide groove 5, the U-shaped lifting plate 6 can be better limited and lifted, and the connecting plate 7 can be easily lifted and lowered by subsequent driving components, thereby improving the practicality and applicability of the entire device during the printing process.

[0030] The lifting mechanism also includes a servo motor 3 fixedly connected to the bottom surface of the U-shaped mounting frame 2, and the output shaft of the servo motor 3 rotates through the bottom surface of the U-shaped mounting frame 2 and is fixedly connected to a first threaded rod 4 for driving the U-shaped lifting plate 6 to move up and down. The outer surface of the first threaded rod 4 is threadedly connected to the reserved hole on the bottom surface of the U-shaped lifting plate 6, and the upper end of the first threaded rod 4 is rotatably connected to the inner top wall of the U-shaped mounting frame 2. The inner bottom wall of the U-shaped mounting frame 2 is fixedly connected to two sliding rods 14 for limiting the lifting and lowering of the U-shaped lifting plate 6.

[0031] By setting up a servo motor 3, the output shaft of the servo motor 3 drives the first threaded rod 4 to rotate at the U-shaped mounting frame 2, and the first threaded rod 4 can cooperate with the U-shaped lifting plate 6 thread during the rotation process, thereby driving the U-shaped lifting plate 6 to rise and fall.

[0032] This in turn drives the connecting plate 7 to move up and down, and the setting of the slide bar 14 can better improve the stability of the U-shaped lifting plate 6 during the lifting adjustment, and avoid the U-shaped lifting plate 6 from shaking during the lifting process.

[0033] The unfolding plate 12 is provided with a transverse component connected to the connecting plate 7, and the transverse component is used to drive the unfolding plate 12 to move transversely; the clamping mechanism 13 is used to clamp and fix the screen.

[0034] refer to Figures 1 to 5 The setting of the horizontal component can facilitate the adjustment of the expansion and closure of the clamping mechanism 13, so that it can facilitate the clamping and fixing of both sides of the screen plates of different shapes.

[0035] In addition, by setting up the clamping mechanism 13, the screen plate can be pressed down when it is clamped and fixed, thereby improving the stability of the screen plate and facilitating the installation, disassembly and replacement of the screen plate, greatly improving the convenience of the staff in replacing the screen plate.

[0036] The lateral component includes two second guide grooves 10 opened on the front of the connecting plate 7. The backs of the two expansion plates 12 are fixedly connected with two connecting screw rings 11 for driving the expansion plates 12 to move horizontally, and the outer surfaces of the connecting ends of the connecting screw rings 11 are slidingly connected to the inner walls of the second guide grooves 10. The annular rings of the two connecting screw rings 11 away from the expansion plates 12 are located outside the connecting plate 7.

[0037] By setting up the second guide groove 10, it is possible to better facilitate the limited sliding of the connecting screw ring 11, so that the connecting screw ring 11 can drive the stability of the expansion plate 12 during lateral adjustment, and avoid the shaking of the connecting screw ring 11 during lateral movement, thereby greatly improving the stability of the entire device during lateral movement.

[0038] The horizontal component also includes a dual-output shaft motor 8 fixedly connected to the back of the connecting plate 7. The two output shafts of the dual-output shaft motor 8 are fixedly connected to a second threaded rod 9 for driving the connecting screw ring 11 to move horizontally. The back of the connecting plate 7 is fixedly connected to two fixed plates 15 for limiting the rotation of the second threaded rod 9.

[0039] By setting up a dual-output shaft motor 8, the two output shafts of the dual-output shaft motor 8 drive the two second threaded rods 9 to rotate, and the second threaded rods 9 are threadedly engaged with the connecting screw ring 11 during the rotation process, and the thread directions of the two second threaded rods 9 are opposite, so that it is easy to drive the two connecting screw rings 11 to move relative to each other.

[0040] This facilitates driving the two unfolding plates 12 to move in opposite directions, and further facilitates driving the clamping mechanism 13 to perform unfolding and closing movements, thereby facilitating clamping of screen plates of different sizes.

[0041] The clamping mechanism 13 includes an L-shaped fixing plate 1301 fixedly connected to one end of the two unfolding plates 12 that is away from each other, and two electric push rods 1302 are installed on the upper surface of the L-shaped fixing plate 1301. The output ends of the two sets of electric push rods 1302 slide through the L-shaped fixing plate 1301 on the same side and are fixedly connected to a pushing plate 1303. The side surfaces of the two pushing plates 1303 that are close to each other are fixedly connected to an L-shaped clamping plate 1304.

[0042] By setting up an electric push rod 1302, the output end of the electric push rod 1302 can push the push plate 1303 to move up and down, thereby driving the L-shaped clamping plate 1304 to move up and down, thereby facilitating the adjustment of the distance between the L-shaped clamping plate 1304 and the printing body 17 when installing the screen plate, providing sufficient space for the installation of the screen plate.

[0043] The inner walls of the two L-shaped clamping plates 1304 are hinged with a clamping plate 1305 through a pin shaft, the outer surface of the L-shaped fixed plate 1301 is fixedly connected to two convex plates 1306, and the bottom surface of the convex plate 1306 is hinged with a transmission plate 1307 for pushing the clamping plate 1305 to clamp and fix the silk screen, the back sides of the two L-shaped fixed plates 1301 are fixedly connected to a limiting plate 1308, and the outer surface of the limiting plate 1308 is fixedly connected to a stabilizing rod 1309 that is slidably connected to the reserved hole on the outer surface of the connecting plate 7.

[0044] By setting up the clamping plate 1305, it can be conveniently pushed down by the electric push rod 1302, and then the distance between the L-shaped clamping plate 1304 and the printing body 17 can be adjusted, so that the installation of the screen plate body 18 can be facilitated. After installation, when the electric push rod 1302 moves up, the clamping plate 1305 can be limited and blocked by the transmission plate 1307, so that the clamping plate 1305 presses down and clamps the screen plate body 18, thereby greatly improving the clamping and fixing effect of the screen plate body 18.

[0045] The side of the clamping plate 1305 that contacts the screen is provided with an anti-slip strip, which can further enhance the clamping and fixation of the screen and prevent the screen from shaking during the printing process. The setting of the stabilizing rod 1309 can facilitate the improvement of the stability of the L-shaped fixing plate 1301 during the expansion and closing movement, and avoid the risk of bending due to a small force point.

[0046] The front of the connecting plate 7 is fixedly connected to a slide rail 16, and the outer surface of the slide rail 16 is installed with a printing body 17 for printing products. The lower part of the printing body 17 is provided with a screen plate body 18 clamped and fixed by a clamping mechanism 13. The four corners of the bottom surface of the printing table 1 are fixedly connected with support legs 19 for supporting the printing table 1, and the lower end of the support leg 19 is fixedly connected to a foot pad 20.

[0047] By setting up the slide rail 16, it is convenient to drive the printing body 17 to slide under the limiting support of the slide rail 16 through a robotic arm or a starting component, so that the printing body 17 can scrape the ink on the screen plate body 18 back and forth, so that the ink can print the product through the screen plate body 18, and the setting of the support legs 19 and the foot pads 20 can facilitate the support, stability and placement of the entire device.

[0048] The specific implementation process of the present invention is as follows: during the screen printing process, the electric push rod 1302 is first started, so that the electric push rod 1302 pushes the L-shaped clamping plate 1304 down, and expands the distance between the printing body 17 and the L-shaped clamping plate 1304, thereby providing sufficient space for the installation of the screen plate body 18, and when the electric push rod 1302 pushes the L-shaped clamping plate 1304 down, it can simultaneously pull the clamping plate 1305 to expand through the transmission plate 1307, thereby facilitating the placement of the screen plate body 18 in the L-shaped clamping plate 1304.

[0049] At this time, by starting the dual-output shaft motor 8, the output shaft of the dual-output shaft motor 8 drives the two second threaded rods 9 to rotate, so that the second threaded rod 9 drives the connecting screw ring 11 to perform opposite movement at the second guide groove 10, so that the expansion plate 12 can be driven to move synchronously through the connecting screw ring 11, so that the expansion plate 12 drives the two L-shaped fixed plates 1301 to move in opposite or relative directions, so that the two sides of the screen plate main body 18 can be clamped and released through the L-shaped clamping plate 1304.

[0050] After placement is completed, the L-shaped clamping plate 1304 is pulled by the electric push rod 1302 to move the screen plate body 18 to the bottom of the printing body 17, and at the same time, the screen plate body 18 is pressed down by the clamping plate 1305, so that the screen plate body 18 can be locked to prevent the screen plate body 18 from shaking and offsetting.

[0051] At this time, the servo motor 3 can be started, and the output shaft of the servo motor 3 drives the first threaded rod 4 to rotate, so that the first threaded rod 4 drives the U-shaped lifting plate 6 to be raised and lowered under the limiting action of the first guide groove 5, thereby driving the entire printing component to perform lifting movement.

[0052] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A screen printing device, characterized in that: The invention comprises a printing table (1), a connecting plate (7), two unfolding plates (12) and a clamping mechanism (13), wherein the connecting plate (7) is provided with a lifting assembly connected to the printing table (1), and the lifting assembly is used to drive the connecting plate (7) to move up and down; the unfolding plate (12) is provided with a transverse assembly connected to the connecting plate (7), and the transverse assembly is used to drive the unfolding plate (12) to move transversely; the clamping mechanism (13) is used to clamp and fix the screen plate, and the clamping mechanism (13) comprises an L-shaped fixing plate (1301) fixedly connected to one end of the two unfolding plates (12) away from each other, and two electric push rods (1302) are installed on the upper surface of the L-shaped fixing plate (1301), and the output ends of the two groups of electric push rods (1302) slide through the L-shaped fixing plate (1301) on the same side. The fixing plate (1301) is fixedly connected to the pushing plate (1303), and the side surfaces of the two pushing plates (1303) close to each other are fixedly connected to the L-shaped clamping plates (1304), and the inner side walls of the two L-shaped clamping plates (1304) are hinged to the clamping plates (1305) through pins. The outer surface of the L-shaped fixing plate (1301) is fixedly connected to two convex plates (1306), and the bottom surface of the convex plate (1306) is hinged to a transmission plate (1307) for pushing the clamping plate (1305) to clamp and fix the screen. The back surfaces of the two L-shaped fixing plates (1301) are fixedly connected to the limiting plates (1308), and the outer surface of the limiting plates (1308) is fixedly connected to the stabilizing rod (1309) that is slidably connected to the reserved hole on the outer surface of the connecting plate (7).

2. A screen printing device according to claim 1, characterized in that: The lifting assembly comprises a U-shaped lifting plate (6) fixedly connected to the rear side of the connecting plate (7); a U-shaped mounting frame (2) for limiting the position of the U-shaped lifting plate (6) is fixedly connected to the back of the printing table (1); two first guide grooves (5) for guiding the U-shaped lifting plate (6) are provided on the front of the U-shaped mounting frame (2); and the inner walls of the first guide grooves (5) are slidably connected to the outer surface of the U-shaped lifting plate (6).

3. The screen printing device according to claim 2, characterized in that: The lifting mechanism further comprises a servo motor (3) fixedly connected to the bottom surface of the U-shaped mounting frame (2), and the output shaft of the servo motor (3) rotates through the bottom surface of the U-shaped mounting frame (2) and is fixedly connected to a first threaded rod (4) for driving the U-shaped lifting plate (6) to move up and down, the outer surface of the first threaded rod (4) is threadedly connected to a reserved hole on the bottom surface of the U-shaped lifting plate (6), and the upper end of the first threaded rod (4) is rotatably connected to the inner top wall of the U-shaped mounting frame (2), and the inner bottom wall of the U-shaped mounting frame (2) is fixedly connected to two sliding rods (14) for limiting the lifting and lowering of the U-shaped lifting plate (6).

4. The screen printing device according to claim 1, characterized in that: The transverse component includes two second guide grooves (10) opened on the front of the connecting plate (7), and the backs of the two expansion plates (12) are fixedly connected with two connecting screw rings (11) for driving the expansion plates (12) to move transversely, and the outer surfaces of the connecting ends of the connecting screw rings (11) are slidably connected to the inner walls of the second guide grooves (10), and the annular rings of the two connecting screw rings (11) away from the expansion plates (12) are located outside the connecting plate (7).

5. The screen printing device according to claim 4, characterized in that: The transverse component further comprises a dual-output shaft motor (8) fixedly connected to the back of the connecting plate (7), the two output shafts of the dual-output shaft motor (8) are both fixedly connected to a second threaded rod (9) for driving the connecting screw ring (11) to move transversely, and the back of the connecting plate (7) is fixedly connected to two fixing plates (15) for limiting the rotation of the second threaded rod (9).

6. The screen printing device according to claim 1, characterized in that: The front surface of the connecting plate (7) is fixedly connected to a slide rail (16), and a printing body (17) for printing products is installed on the outer surface of the slide rail (16). The lower part of the printing body (17) is provided with a screen plate body (18) clamped and fixed by a clamping mechanism (13). The four corners of the bottom surface of the printing table (1) are fixedly connected to support legs (19) for supporting the printing table (1), and the lower ends of the support legs (19) are fixedly connected to foot pads (20).

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