A wide format flexographic printing apparatus

Abstract

This invention belongs to the field of printing technology, specifically a wide-format flexographic printing device. Addressing the issue of substrates being susceptible to wrinkles or folds due to external factors, the following solution is proposed: a frame and a mounting frame. Mounting plates are fixedly connected to the inner walls of both sides of the mounting frame, and a smoothing rod is movably connected to one outer wall of each mounting plate. A smoothing component is fixedly connected to the outer wall of the smoothing rod, and multiple smoothing brushes are evenly spaced on the outer wall of the smoothing component. A shaft is rotatably connected to one outer wall of each of the two mounting plates, and a drive motor is fixedly connected to one outer wall of one of the mounting plates. The output shaft of the drive motor is connected to one end of one of the shafts via a coupling. Driven gears are fixedly connected to both ends of the smoothing rod. This wide-format flexographic printing device discloses can slightly stretch the sides of the substrate before printing, preventing wrinkles or folds during printing and ensuring printing quality during device use.

Description

Technical Field

[0001] This invention relates to the field of printing technology, and more particularly to a wide-format flexographic printing apparatus. Background Technology

[0002] Flexographic printing is a type of letterpress printing that uses a flexible printing plate and an anilox roller to transfer ink. The image areas of the flexographic plate are raised. During printing, the anilox roller evenly coats the image areas of the plate with an ink layer of a certain thickness. Then, under the pressure of the impression roller, the ink layer of the image areas is transferred to the surface of the substrate, forming a clear image.

[0003] Wide and narrow formats are distinguished by the width of the feed material. Generally, a feed width of 600mm is used as the dividing line. Flexographic printing machines with a feed width of less than 600mm are called narrow machines, and those with a feed width of more than 600mm are called wide machines.

[0004] When performing wide-format printing, existing flexographic printing equipment is prone to problems. Due to the large width of the substrate, the substrate with low hardness is easily affected by external factors, which can cause wrinkles or folds. This can lead to errors in the printed pattern and result in poor product quality. Summary of the Invention

[0005] This invention discloses a wide-format flexographic printing apparatus, which aims to solve the technical problem in the prior art where existing flexographic printing apparatuses, when performing wide-format printing, are prone to wrinkling or folding of substrates with low hardness due to their large width, leading to errors in the printed pattern and resulting in poor product quality.

[0006] This invention proposes a wide-format flexographic printing device, comprising a frame and a mounting frame. Mounting plates are fixedly connected to the inner walls of both sides of the mounting frame, and a smoothing rod is movably connected to one outer wall of each of the two mounting plates. A smoothing component is fixedly connected to the outer wall of the smoothing rod, and multiple smoothing brushes are evenly spaced on the outer wall of the smoothing component. A shaft is rotatably connected to one outer wall of each of the two mounting plates, and a drive motor is fixedly connected to one outer wall of one of the mounting plates. The output shaft of the drive motor is connected to one end of one shaft via a coupling. Driven gears are fixedly connected to both ends of the smoothing rod. A [missing information - likely a specific type of gear] is fixedly connected to the outer wall of one shaft and one end of the other shaft. The two drive gears mesh with the two driven gears respectively. The other end of each of the two shafts is fixedly connected to a tension seat. The interior of each of the two tension seats has four mounting holes at equal intervals. A pressure spring is fixedly connected to one side of the inner wall of each of the eight mounting holes. One end of each of the eight pressure springs is fixedly connected to a tension member. The outer wall of each of the eight tension members has multiple elastic protrusions. The outer wall of each of the two tension seats has eight limiting holes. The sixteen limiting holes are connected to the eight mounting holes respectively. The inner walls of both sides of each of the eight tension members are fixedly connected to limiting members. The outer walls of the sixteen limiting members are in contact with the inner walls of the sixteen limiting holes respectively.

[0007] Equipped with a drive motor, mounting plate, shaft, drive gear, driven gear, smoothing rod, smoothing brush, stretching seat, stretching component, elastic protrusion, and pressure spring, the stretching seat and stretching component can stretch the substrate to both sides, thus smoothing out wrinkles or folds and preventing errors or blurring of the pattern during printing. This improves the printing quality. Furthermore, during stretching, the elastic protrusion and pressure spring prevent the stretching component from making hard contact with the substrate surface, thus avoiding damage and improving the device's performance. Simultaneously, the smoothing rod and smoothing brush smooth the substrate during stretching, further improving printing quality. Smoothing also cleans the substrate surface, preventing dust from affecting the printing effect.

[0008] In a preferred embodiment, two electric telescopic rods are fixedly connected to the bottom of the inner wall of the frame. The output ends of both electric telescopic rods are fixedly connected to the bottom of the mounting frame. A fixing opening is provided on one side of the outer wall of the mounting frame. A second motor is fixedly connected to the inner wall of the fixing opening. The output shaft of the second motor is connected to an adjusting pressure roller via a coupling. One end of the adjusting pressure roller is movably connected to one side of the inner wall of the mounting frame. The same support roller is movably connected to both sides of the inner wall of the mounting frame. The same ink fountain roller, an anilox ink transfer roller, and a printing roller are movably connected to both sides of the inner wall of the frame. The anilox ink transfer roller is located between the printing roller and the ink fountain roller. A gear is fixedly connected to the outer wall of the anilox ink transfer roller. Gears are fixedly connected to the outer walls of both the printing roller and the ink fountain roller. Both gears are meshed with gears. A first motor is fixedly connected to one side of the outer wall of the frame. The output shaft of the first motor is connected to one end of the ink fountain roller via a coupling.

[0009] In a preferred embodiment, the outer wall of the printing roller is provided with two printing plates. One printing plate has multiple positioning holes evenly spaced on one side of its outer wall, and the other printing plate has multiple positioning rods fixedly connected at equal intervals on one side of its outer wall, with the positioning rods located inside the positioning holes. The two printing plates have two interconnected annular grooves inside. One printing plate has through-holes at both ends, which are connected to the two annular grooves. Fixing members are movably connected inside the two annular grooves. Adjusting springs are fixedly connected to one side of the inner wall of each of the two annular grooves. One end of each adjusting spring is fixedly connected to one side of the outer wall of each fixing member, and adjusting rods are fixedly connected to both sides of the outer walls of each fixing member. The four adjusting rods are located inside the two limiting holes.

[0010] The device is equipped with printing plates, fasteners, annular grooves, positioning rods, positioning holes, adjusting components, limit ports, and adjusting springs. The adjusting and fasteners allow for the separation of two printing plates, enabling operators to quickly change between plates with different patterns without disassembling the printing rollers. This improves the ease of use. Furthermore, the positioning rods and holes limit the installation of the printing plates, preventing deviations. The adjusting springs automatically fix the two printing plates to the outside of the printing rollers, further enhancing the device's usability.

[0011] In a preferred embodiment, the top inner wall of the frame has multiple through holes at equal intervals, and a fixed frame is fixedly connected to the top of the frame. The top of the fixed frame has a connection port, and a connecting pipe is fixedly connected to the inner wall of the connection port. A diverter pipe is fixedly connected to the output end of the connecting pipe, and the inner walls of the multiple through holes are all fixedly connected to the outer walls of the diverter pipes. A rotating seat is movably connected to the top of the fixed frame, and four ink tanks are provided on the top of the rotating seat. Ink outlet pipes are fixedly connected to the outer walls of the four ink tanks, and the output end of one of the ink outlet pipes is connected to the input end of the connecting pipe. A control valve is provided on the outer walls of the four ink outlet pipes. Four fixing holes are equally spaced on the top of the rotating seat, and a spring pin is fixedly connected to the top of the fixed frame. The outer wall of the spring pin contacts the inner wall of one of the fixing holes.

[0012] The device is equipped with a diverter pipe, connecting pipe, ink outlet pipe, ink reservoir, control valve, spring pin, fixing hole, rotating seat, and mounting bracket. The diverter pipe ensures that the ink is evenly distributed on the surface of the ink fountain roller during delivery, thus avoiding inconsistent color depth in the printed image and improving printing quality. When the ink is insufficient, the control valve and rotating seat allow for quick replacement of the ink reservoir, improving the continuity of the device's operation and making it convenient and quick to operate. The spring pin and fixing hole limit the rotation of the rotating seat when replacing the ink reservoir, ensuring that the ink outlet pipe and connecting pipe are connected and preventing ink leakage due to misalignment between them, thereby reducing resource waste.

[0013] As can be seen from the above, the wide-format flexographic printing device provided by the present invention can slightly stretch both sides of the substrate before printing to avoid wrinkles or folds during printing and ensure the printing quality when the device is used. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a wide-format flexographic printing device proposed in this invention;

[0015] Figure 2 This is a schematic diagram of the combined structure of the support roller and ink fountain roller of a wide-width flexographic printing device proposed in this invention.

[0016] Figure 3 This is a schematic diagram of the combination structure of the smoothing component and the shaft of a wide-width flexographic printing device proposed in this invention;

[0017] Figure 4 This is a schematic diagram of the combined structure of the stretching seat and elastic bump of a wide-width flexographic printing device proposed in this invention.

[0018] Figure 5 This is a schematic diagram of the positioning rod and printing roller assembly structure of a wide-format flexographic printing device proposed in this invention.

[0019] Figure 6This is a schematic diagram of the combined structure of the annular groove and the fixing component of a wide-width flexographic printing device proposed in this invention;

[0020] Figure 7 This is a schematic diagram of the combined structure of the fixing frame and the diversion pipe of a wide-format flexographic printing device proposed in this invention;

[0021] Figure 8 This is a schematic diagram of the combination structure of the fixing hole and the rotating seat of a wide-width flexographic printing device proposed in this invention.

[0022] In the diagram: 1. Frame; 2. Motor 1; 3. Ink reservoir; 4. Mounting bracket; 5. Motor 2; 6. Gear 1; 7. Gear 2; 8. Ink fountain roller; 9. Anilox roller; 10. Electric telescopic rod; 11. Support roller; 12. Smoothing brush; 13. Smoothing rod; 14. Drive motor; 15. Shaft; 16. Mounting plate; 17. Drive gear; 18. Driven gear; 19. Smoothing component; 20. Tension seat; 21. Tension component; 22. Pressure spring; 23. Limiting element. 24. Elastic protrusion; 25. Mounting port; 26. Limiting port; 27. Positioning rod; 28. Positioning hole; 29. ​​Printing plate; 30. Printing roller; 31. Fixing component; 32. Adjusting rod; 33. Limiting through port; 34. Adjusting spring; 35. Annular groove; 36. Through hole; 37. Fixing bracket; 38. Diverter pipe; 39. Spring pin; 40. Control valve; 41. Ink outlet pipe; 42. Fixing hole; 43. Connecting pipe; 44. Rotating seat; 45. Adjusting pressure roller. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] The wide-format flexographic printing device disclosed in this invention is mainly used in scenarios where the substrate is easily affected by external factors and may wrinkle or fold.

[0025] Reference Figure 1-8A wide-format flexographic printing device includes a frame 1 and a mounting frame 4. Mounting plates 16 are fixedly connected to the inner walls of both sides of the mounting frame 4. A smoothing rod 13 is rotatably connected to one outer wall of each of the two mounting plates 16. A smoothing component 19 is fixedly connected to the outer wall of the smoothing rod 13, and multiple smoothing brushes 12 are evenly spaced on the outer wall of the smoothing component 19. A shaft 15 is connected to one outer wall of each of the two mounting plates 16 via bearings. A drive motor 14 is fixedly connected to one outer wall of one of the mounting plates 16. The output shaft of the drive motor 14 is connected to one end of one shaft 15 via a coupling. Driven gears 18 are fixedly connected to both ends of the smoothing rod 13. A drive gear is fixedly connected to the outer wall of one shaft 15 and one end of the other shaft 15. 17, and the two drive gears 17 mesh with the two driven gears 18 respectively. The other end of the two shafts 15 is fixedly connected to the tension seat 20. The interior of the two tension seats 20 is provided with four mounting holes 25 at equal intervals. The inner wall of one side of each of the eight mounting holes 25 is fixedly connected to a pressure spring 22. One end of each of the eight pressure springs 22 is fixedly connected to a tension member 21. The outer wall of one side of each of the eight tension members 21 is provided with multiple elastic protrusions 24. The outer wall of each of the two tension seats 20 is provided with eight limiting holes 26. The sixteen limiting holes 26 are respectively connected to the eight mounting holes 25. The inner walls of both sides of each of the eight tension members 21 are fixedly connected to limiting members 23. The outer walls of the sixteen limiting members 23 are respectively in contact with the inner walls of the sixteen limiting holes 26.

[0026] Specifically, before printing, the drive motor 14 is started, which drives one of the shafts 15 to rotate. Since the drive gear 17 meshes with the driven gear 18, the drive motor 14 can drive the smoothing rod 13 to rotate, which in turn drives both shafts 15 to rotate simultaneously. When the smoothing rod 13 rotates, it can drive the smoothing component 19 and the smoothing brush 12 to rotate. The smoothing brush 12 contacts the surface of the substrate and smooths and cleans it. At the same time, the shaft 15 can drive the stretching seat 20 to rotate, and when it rotates, the stretching component 21 contacts the substrate and stretches it to both sides to ensure its flatness.

[0027] In specific application scenarios, the stretching seat 20 and the stretching member 21 can stretch the substrate to both sides, thereby flattening the wrinkled or folded parts, thus avoiding errors or blurring of the pattern during printing, improving the printing quality when using the device. During stretching, the elastic protrusion 24 and the pressure spring 22 can prevent the stretching member 21 from making hard contact with the surface of the substrate, thereby preventing damage to the substrate and improving the performance of the device. At the same time, during stretching, the smoothing rod 13 and the smoothing soft brush 12 can smooth the substrate, thereby further improving the printing quality. The smoothing process can also clean the surface of the substrate, preventing dust from falling on the surface and affecting the printing effect.

[0028] Reference Figure 1 , Figure 2 and Figure 5 In a preferred embodiment, two electric telescopic rods 10 are fixedly connected to the bottom of the inner wall of the frame 1. The output ends of the two electric telescopic rods 10 are fixedly connected to the bottom of the mounting frame 4. A fixing opening is provided on one side of the outer wall of the mounting frame 4. A motor 2 5 is fixedly connected to the inner wall of the fixing opening. The output shaft of the motor 2 5 is connected to an adjusting pressure roller 45 through a coupling. One end of the adjusting pressure roller 45 is rotatably connected to one side of the inner wall of the mounting frame 4. The same support roller 11 is rotatably connected to both sides of the inner wall of the mounting frame 4. The same ink fountain roller 8, an anilox ink transfer roller 9, and a printing roller 30 are rotatably connected to both sides of the inner wall of the frame 1. The anilox ink transfer roller 9 is located between the printing roller 30 and the ink fountain roller 8. A gear 1 6 is fixedly connected to the outer wall of the anilox ink transfer roller 9. Gear 2 7 is fixedly connected to the outer walls of both the printing roller 30 and the ink fountain roller 8. Both gear 2 7 mesh with gear 1 6. A motor 1 2 is fixedly connected to one side of the outer wall of the frame 1. The output shaft of the motor 1 2 is connected to one end of the ink fountain roller 8 through a coupling.

[0029] Specifically, during printing, the electric telescopic rod 10 extends and retracts, causing the adjusting pressure roller 45 to bring the substrate into contact with the surface of the printing plate 29. At this time, motor 25 is started, which drives the adjusting pressure roller 45 to automatically transport the substrate. Simultaneously, motor 12 is started, which drives the ink fountain roller 8 to rotate. Since gear 27 meshes with gear 16, the ink fountain roller 8 can drive the anilox ink transfer roller 9 and the printing roller 30 to rotate while rotating, so as to facilitate printing on the substrate.

[0030] Reference Figure 1 , Figure 5 and Figure 6 In a preferred embodiment, the outer wall of the printing roller 30 is provided with two printing plates 29. One printing plate 29 has multiple positioning holes 28 evenly spaced on one side of its outer wall, and the other printing plate 29 has multiple positioning rods 27 fixedly connected at equal intervals on one side of its outer wall. The multiple positioning rods 27 are located inside the multiple positioning holes 28. The two printing plates 29 have two interconnected annular grooves 35 inside. One printing plate 29 has through-limiting openings 33 at both ends. The two limiting openings 33 are connected to the two annular grooves 35, and the two annular grooves 35 are slidably connected with fixing members 31 inside. The inner wall of one side of each annular groove 35 is fixedly connected with adjusting springs 34. One end of each adjusting spring 34 is fixedly connected to one side of the outer wall of each fixing member 31, and the outer walls of both sides of each fixing member 31 are fixedly connected with adjusting rods 32. The four adjusting rods 32 are located inside the two limiting openings 33.

[0031] Specifically, when replacing the printing plate 29, the operator moves the adjusting rod 32, causing it to move inside the limiting through hole 36. At this time, the adjusting rod 32 can drive the fixing part 31 to move, thereby deforming the adjusting spring 34 and separating the two printing plates 29. After the replacement is completed, the two printing plates 29 are connected by the positioning rod 27 and the positioning hole 28. At this time, the adjusting spring 34 can drive the fixing part 31 to move inside the annular groove 35, thereby fixing the two printing plates 29.

[0032] In specific application scenarios, the two printing plates 29 can be separated by the adjusting component and the fixing component 31, allowing the operator to quickly change the printing plates 29 with different patterns as needed without disassembling the printing roller 30, thus improving the convenience of the device. When installing the printing plates 29, the positioning rod 27 and the positioning hole 28 can limit their position to avoid deviation during installation. At the same time, the adjusting spring 34 can drive the fixing component 31 to automatically fix the two printing plates 29 to the outside of the printing roller 30, thereby further improving the convenience of the device.

[0033] Reference Figure 1 , Figure 7 and Figure 8 In a preferred embodiment, the top inner wall of the frame 1 is provided with a plurality of through holes 36 at equal intervals, and the top of the frame 1 is fixedly connected to a fixing frame 37. The top of the fixing frame 37 is provided with a connection port, and the inner wall of the connection port is fixedly connected to a connecting pipe 43. The output end of the connecting pipe 43 is fixedly connected to a diverter pipe 38. The inner walls of the plurality of through holes 36 are all fixedly connected to the outer walls of the diverter pipe 38. The top of the fixing frame 37 is rotatably connected to a rotating seat 44. The top of the rotating seat 44 is provided with four ink storage tanks 3. The outer walls of the four ink storage tanks 3 are all fixedly connected to ink outlet pipes 41. The output end of one of the ink outlet pipes 41 is connected to the input end of the connecting pipe 43, and the outer walls of the four ink outlet pipes 41 are all provided with control valves 40. The top of the rotating seat 44 is provided with four fixing holes 42 at equal intervals, and the top of the fixing frame 37 is fixedly connected to a spring pin 39. The outer wall of the spring pin 39 is in contact with the inner wall of one of the fixing holes 42.

[0034] Specifically, during printing, the control valve 40 is opened, and ink enters the connecting pipe 43 through the ink outlet pipe 41. It is then transported to the interior of the diversion pipe 38 through the connecting pipe 43, and flows to the surface of the ink fountain roller 8. When the ink fountain roller 8 rotates, the ink is transferred from the ink fountain roller 8 and the anilox roller 9 to the graphic portion of the printing plate 29, where it is inked and then printed. When the ink in the ink tank 3 is insufficient, the control valve 40 is closed and the rotating seat 44 is rotated. At this time, the spring pin 39 will deform due to the rotation, thus separating from the fixing hole 42. When another ink tank 3 moves above the connecting pipe 43, the spring pin 39 will engage with the fixing hole 42 above it, thereby fixing the rotating seat 44. At this time, the ink outlet pipe 41 is connected to the connecting pipe 43, and the control valve 40 is opened to deliver ink.

[0035] In specific application scenarios, the diverter pipe 38 enables the ink to be evenly distributed on the surface of the ink fountain roller 8 during delivery, thereby avoiding inconsistent color depth in the printed image areas and improving the printing effect. When the ink is insufficient, the ink tank 3 can be quickly replaced through the control valve 40 and the rotating seat 44, thereby improving the continuity of the device during use and making the operation convenient and quick. The spring pin 39 and the fixing hole 42 can limit the rotating seat 44 when replacing the ink tank 3, ensuring that the ink outlet pipe 41 and the connecting pipe 43 are connected, preventing ink leakage due to deviation between the ink outlet pipe 41 and the connecting pipe 43, thereby reducing resource waste.

[0036] Working principle: Before printing, the drive motor 14 is started, which drives one of the shafts 15 to rotate. Since the drive gear 17 meshes with the driven gear 18, the drive motor 14 drives the smoothing rod 13 to rotate, which in turn drives both shafts 15 to rotate simultaneously. When the smoothing rod 13 rotates, it drives the smoothing component 19 and the smoothing brush 12 to rotate. The smoothing brush 12 contacts the surface of the substrate and smooths and cleans it. Simultaneously, the shafts 15 drive the stretching seat 20 to rotate, causing the stretching component 21 to contact the substrate and smooth it. It stretches to both sides to ensure flatness. During printing, the electric telescopic rod 10 extends and retracts, causing the adjusting pressure roller 45 to bring the substrate into contact with the surface of the printing plate 29. At this time, motor 25 is started, which drives the adjusting pressure roller 45 to automatically transport the substrate. Simultaneously, motor 12 is started, which drives the ink fountain roller 8 to rotate. Due to the meshing of gear 27 and gear 16, the ink fountain roller 8 can drive the anilox ink transfer roller 9 and the printing roller 30 to rotate while rotating. At the same time, the control valve 40 is opened, and ink enters the connecting pipe 43 through the ink outlet pipe 41 and flows through... The ink is conveyed through the connecting pipe 43 to the inside of the diversion pipe 38, and then flows to the surface of the ink fountain roller 8. When the ink fountain roller 8 rotates, the ink is transferred from the ink fountain roller 8 and the anilox roller 9 to the graphic portion of the printing plate 29, where it is inked, thus printing on the substrate. When the ink in the ink tank 3 is insufficient, the control valve 40 is closed and the rotating seat 44 is rotated. At this time, the spring pin 39 will deform due to the rotation, thus separating from the fixing hole 42. When another ink tank 3 moves above the connecting pipe 43, the spring pin 39 will engage with the fixing hole 42 above it, thereby fixing the rotating seat 44. The ink tube 41 is connected to the connecting tube 43, thereby opening the control valve 40 to deliver ink. When replacing the printing plate 29, the operator moves the adjusting rod 32, causing the adjusting rod 32 to move inside the limiting through hole 36. At this time, the adjusting rod 32 can drive the fixing part 31 to move, thereby causing the adjusting spring 34 to deform, thus separating the two printing plates 29. After the replacement is completed, the two printing plates 29 are connected through the positioning rod 27 and the positioning hole 28. At this time, the adjusting spring 34 can drive the fixing part 31 to move inside the annular groove 35, thereby fixing the two printing plates 29.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A wide-format flexographic printing apparatus, comprising a frame (1) and a mounting bracket (4), characterized in that, Mounting plates (16) are fixedly connected to the inner walls of both sides of the mounting bracket (4), and a smoothing rod (13) is movably connected to one outer wall of each of the two mounting plates (16). A smoothing component (19) is fixedly connected to the outer wall of the smoothing rod (13), and multiple smoothing soft brushes (12) are provided at equal intervals on the outer wall of the smoothing component (19). A shaft (15) is rotatably connected to one outer wall of each of the two mounting plates (16), and a drive motor (14) is fixedly connected to one outer wall of one of the mounting plates (16). The output shaft of the drive motor (14) is connected to one end of one shaft (15) through a coupling. Driven gears (18) are fixedly connected to both ends of the smoothing rod (13). A drive gear (17) is fixedly connected to the outer wall of one shaft (15) and one end of the other shaft (15), and two drive gears (17) are fixedly connected to the outer wall of one shaft (15). The shafts (15) mesh with two driven gears (18) respectively. The other end of each shaft (15) is fixedly connected to a tension seat (20). The interior of each tension seat (20) is provided with four mounting holes (25) at equal intervals. Each inner wall of one side of each mounting hole (25) is fixedly connected to a pressure spring (22). Each end of each pressure spring (22) is fixedly connected to a tension member (21). Each outer wall of one side of each tension member (21) is provided with multiple elastic protrusions (24). Each outer wall of each tension seat (20) is provided with eight limiting holes (26). Each of the sixteen limiting holes (26) is connected to the eight mounting holes (25) respectively. Each inner wall of each side of each tension member (21) is fixedly connected to a limiting member (23). The outer walls of the sixteen limiting members (23) are in contact with the inner walls of the sixteen limiting holes (26) respectively.

2. The wide-format flexographic printing apparatus according to claim 1, characterized in that, Two electric telescopic rods (10) are fixedly connected to the bottom of the inner wall of the frame (1). The output ends of the two electric telescopic rods (10) are fixedly connected to the bottom of the mounting frame (4). A fixing opening is provided on one side of the outer wall of the mounting frame (4). A second motor (5) is fixedly connected to the inner wall of the fixing opening. The output shaft of the second motor (5) is connected to an adjusting pressure roller (45) through a coupling. One end of the adjusting pressure roller (45) is movably connected to the inner wall of one side of the mounting frame (4).

3. A wide-format flexographic printing apparatus according to claim 2, characterized in that, The same support roller (11) is movably connected to the inner walls of both sides of the mounting frame (4), and the same ink fountain roller (8), an anilox ink transfer roller (9) and printing roller (30) are movably connected to the inner walls of both sides of the frame (1). The anilox ink transfer roller (9) is located between the printing roller (30) and the ink fountain roller (8).

4. A wide-format flexographic printing apparatus according to claim 3, characterized in that, The outer wall of the anilox ink transfer roller (9) is fixedly connected to a gear 1 (6), and the outer walls of the printing roller (30) and the ink fountain roller (8) are both fixedly connected to a gear 2 (7). Both gears 2 (7) mesh with gear 1 (6), and a motor 1 (2) is fixedly connected to one side of the outer wall of the frame (1). The output shaft of the motor 1 (2) is connected to one end of the ink fountain roller (8) through a coupling.

5. A wide-format flexographic printing apparatus according to claim 3, characterized in that, The outer wall of the printing roller (30) is provided with two printing plates (29). One of the printing plates (29) has multiple positioning holes (28) at equal intervals on one side of its outer wall. The other printing plate (29) has multiple positioning rods (27) fixedly connected at equal intervals on one side of its outer wall. The multiple positioning rods (27) are located inside the multiple positioning holes (28).

6. A wide-format flexographic printing apparatus according to claim 5, characterized in that, The two printed plates (29) have two interconnected annular grooves (35) inside. One of the printed plates (29) has through-limiting openings (33) at both ends. The two limiting openings (33) are connected to the two annular grooves (35) respectively, and the two annular grooves (35) are movably connected to the inside of the two annular grooves (35).

7. A wide-format flexographic printing apparatus according to claim 6, characterized in that, One side inner wall of each of the two annular grooves (35) is fixedly connected with an adjusting spring (34), one end of each adjusting spring (34) is fixedly connected to one side outer wall of each of the two fixing parts (31), and both sides outer walls of each of the two fixing parts (31) are fixedly connected with adjusting rods (32). The four adjusting rods (32) are located inside the two limiting ports (33).

8. A wide-format flexographic printing apparatus according to claim 1, characterized in that, The top inner wall of the frame (1) is provided with multiple through holes (36) at equal intervals, and the top of the frame (1) is fixedly connected to a fixed frame (37). The top of the fixed frame (37) is provided with a connection port, and the inner wall of the connection port is fixedly connected to a connecting pipe (43). The output end of the connecting pipe (43) is fixedly connected to a diverter pipe (38). The inner walls of the multiple through holes (36) are all fixedly connected to the outer wall of the diverter pipe (38).

9. A wide-format flexographic printing apparatus according to claim 8, characterized in that, The top of the fixed frame (37) is movably connected to a rotating seat (44), and the top of the rotating seat (44) is provided with four ink storage tanks (3). The outer walls of the four ink storage tanks (3) are all fixedly connected with ink outlet pipes (41). The output end of one of the ink outlet pipes (41) is connected to the input end of the connecting pipe (43), and the outer walls of the four ink outlet pipes (41) are all provided with control valves (40).

10. A wide-format flexographic printing apparatus according to claim 9, characterized in that, The top of the rotating seat (44) is provided with four fixing holes (42) at equal intervals, and the top of the fixing frame (37) is fixedly connected with a spring pin (39), the outer wall of the spring pin (39) is in contact with the inner wall of one of the fixing holes (42).

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