Bilateral color box printing equipment

Abstract

The invention discloses double-side color box printing equipment, and relates to the technical field of printing equipment. In the double-side printing process, when paper is loosened during transmission, the tensioning force of the surface of the paper is low, so that the paper is wrinkled in the printing process and is easily wound with a printing roller, and according to the double-side color box printing equipment, through cooperation of a backing ring and a clamping roller, when the paper is static, through limitation of the backing ring, the paper is not prone to being wound with the printing roller; in the paper moving process, the clamping rollers on the two sides are pushed to move to compress the backing rings through the acting force of paper moving, meanwhile, the contact pressure between the clamping rollers and the paper is increased through the elastic force generated by compressing the backing rings, the paper is leveled, and meanwhile, the paper keeps certain tensioning force. And paper wrinkles caused by paper loosening during printing are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of printing equipment, and specifically relates to a double-sided color box printing equipment. Background Art

[0002] Double-sided color box printing is a process of printing on both the front and back sides of a color box, enabling both sides of the color box to have exquisite patterns, texts, and colors, which can comprehensively display product information and brand images and enhance visual attraction. The most common printing method of double-sided color box printing equipment is roller printing. The ink roller in the ink supply system takes out the ink from the ink tank and evenly coats it on the surface of the printing plate cylinder. The graphic part on the printing plate cylinder will adsorb the ink, while the blank part will not be stained with ink. Under the action of the transmission system, the printing plate cylinder and the impression cylinder rotate synchronously, and the impression cylinder applies pressure to the printing substrate, so that the ink on the graphic part of the printing plate cylinder is transferred to the printing substrate, thus completing the printing process;

[0003] During the double-sided printing process, when the paper transmission becomes loose, the tension on the paper surface is relatively low, resulting in wrinkles on the paper during the printing process and being prone to entanglement with the printing rollers. Summary of the Invention

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0005] A double-sided color box printing equipment, comprising:

[0006] A frame body, on the top of the outer side of which a feeding roller is installed, on the bottom of the outer side of which a winding mechanism is installed, and on the bottom of the inner wall of which a connecting beam is fixedly installed, and on the top of which a connecting plate is fixedly installed;

[0007] A printing mechanism, which is installed inside the frame body and symmetrically installed along the axial center position of the frame body;

[0008] A drying mechanism, which is symmetrically installed on both sides inside the frame body and is located below the printing mechanism;

[0009] At the central positions of the opposite faces of the connecting beam, chute plates are fixedly installed. On the outer sides of the chute plates, chutes are symmetrically formed. And at the chute parts of the chute plates, material clamping rollers are slidably installed. At the chute parts of the chute plates, cushion rings are clamped. The cushion rings are made of elastic materials. Through the cooperation of the cushion rings and the material clamping rollers, when the paper is stationary, due to the limitation of the cushion rings, the material clamping rollers are in staggered contact with each other to clamp the paper. During the movement of the paper, by the acting force of the paper movement, the material clamping rollers on both sides are pushed to move and compress the cushion rings. At the same time, the elastic force generated by compressing the cushion rings increases the contact pressure between the material clamping rollers and the paper. While flattening the paper, a certain tension force of the paper is maintained to prevent the paper from being loose, resulting in wrinkles on the paper during printing. At the bottoms of the chute plates, bottom plates are fixedly installed. On the outer sides of the bottom plates, transverse grooves are formed. And at the transverse groove parts of the bottom plates, pulling rollers are slidably installed. At the transverse groove parts of the bottom plates, elastic cushion rings are clamped. Through the cooperation of the pulling rollers and the elastic cushion rings, during the transmission process, by the contact between the paper and the pulling rollers, the paper is flattened by the pulling rollers. At the same time, during the winding process, the elastic force generated by the pulling rollers compressing the elastic cushion rings after being pressed is utilized to make the pulling rollers drive the paper to be taut, preventing it from being loose and zigzag during the winding process.

[0010] Preferably, the connecting plates are fixedly installed along the central axis position of the frame body. And between the connecting plates, a material limiting roller is rotatably installed. The number of the material limiting rollers is two. The winding mechanism includes a support plate. The support plate is fixedly installed at the bottom outside the frame body. And on the outer side of the support plate, a first motor is fixedly installed. The output end of the first motor penetrates through the support plate and extends to the other side thereof. And the output end of the first motor is fixedly connected with a winding roller through a coupling.

[0011] Preferably, the printing mechanism includes an ink box and side plates. The ink box is fixedly installed on the inner wall of the frame body. The side plates are fixedly installed on both sides of the frame body. And between the side plates, a printing roller is rotatably installed. On the outer side of the side plate, a second motor is fixedly installed. The output end of the second motor is connected with one end of the printing roller through a coupling. An arc convex plate is fixedly installed on the inner wall of the ink box. Through the arc-shaped protrusion at the central position of the arc convex plate, in cooperation with the filter holes and the notches on the surface, while ensuring the ink circulation, the ink is filtered. When the ink flows in the direction of the ink guiding roller, the impurities in the ink are blocked and move to both sides by the arc-shaped shape and enter the slag collection box through the through grooves for collection, preventing caking from reaching the ink transfer area and causing jams during the ink transfer process. The center position on the outer side of the arc convex plate protrudes arc-shaped towards the side away from the printing roller. And at both ends of the arc convex plate close to the printing roller, slag collection boxes are fixedly installed. The outer sides of the slag collection boxes are evenly provided with through holes. Through grooves are formed at both ends of the outer side of the arc convex plate. And filter holes are evenly formed on the outer side of the arc convex plate. Notches are evenly formed at the bottom of the outer side of the arc convex plate.

[0012] Preferably, a ink transfer roller and a rotating shaft are rotatably installed on the inner wall of the ink box. The ink transfer roller is located above the rotating shaft, and the top of the outer side of the ink transfer roller is in contact with the printing roller. A ink guide roller is fixedly installed at the central position of the outer side of the rotating shaft. Grooves are evenly formed on the outer side of the ink guide roller, and the ink guide roller is in close fit with the ink transfer roller. A scraping strip is fixedly installed at the top of the inner wall of the ink box. A sponge strip is fixedly installed at the bottom of the scraping strip. Through the cooperation of the scraping strip and the sponge strip, during the transmission process, the amount of ink on the surface of the rotating ink transfer roller is restricted by the scraping strip, and at the same time, the ink on the surface of the ink transfer roller is smoothed by the sponge strip, ensuring the uniformity of the ink on the surface before the ink transfer roller contacts the printing roller, and avoiding unclear patterns on the printed finished product due to uneven ink transfer. The bottom of the sponge strip is in close fit with the top of the ink transfer roller. A ink blocking strip is fixedly installed on the inner wall of the ink box. The ink blocking strip is located obliquely below the ink transfer roller on the side close to the printing roller.

[0013] Preferably, the drying mechanism includes a air guide box, which is fixedly installed on the inner wall of the frame body. A hot air blower is fixedly installed on the outer side of the air guide box. The air outlet end of the hot air blower is communicated with the air guide box. An end cover is fixedly installed at the open end of the air guide box. An inner guide plate is fixedly installed on the inner wall of the end cover. The inner guide plate is inclined upward from inside to outside. An outer guide plate is fixedly installed on the outer side of the end cover. Through the cooperation of the outer guide plate and the inner guide plate, while the hot air is conducted obliquely upward, the hot air is blown to both sides again, ensuring the comprehensive blowing of the paper and avoiding incomplete drying in some areas, resulting in the re-adhesion of ink during winding and affecting the printing quality. The outer guide plates are symmetrically installed along the central axis position of the end cover, and the ends of the outer guide plates far from the end cover are inclined to both sides. Side support plates are fixedly installed on both sides of the bottom of the air guide box. A material clamping cylinder is rotatably installed between the side support plates.

[0014] The present invention provides a double-sided color box printing device, which has the following beneficial effects:

[0015] First, in this double-sided color box printing device, through the cooperation of the cushion ring and the material clamping roller, when the paper is stationary, the paper is clamped by the staggered contact between the material clamping rollers through the restriction of the cushion ring. During the movement of the paper, through the acting force of the paper movement, the material clamping rollers on both sides are pushed to move and compress the cushion ring. At the same time, through the elastic force generated by the compressed cushion ring, the contact pressure between the material clamping roller and the paper is increased. While flattening the paper, a certain tension force is maintained on the paper, avoiding the paper from being loose and causing wrinkles during printing.

[0016] Second, in this double-sided color box printing device, through the cooperation of the material pulling roller and the elastic cushion ring, during the transmission process, the paper is flattened by the contact between the paper and the material pulling roller. At the same time, during the winding process, the elastic force generated by the compression of the elastic cushion ring by the material pulling roller when the material pulling roller is under pressure is utilized to make the material pulling roller drive the paper to be tightened, avoiding looseness and folding during the winding process.

[0017] III. For this double-sided color box printing device, through the arc-shaped protrusion at the center position of the arc convex plate, in cooperation with the filter holes and grooves on the surface, while ensuring the circulation of the ink, the ink is filtered, so that during the process of flowing towards the ink guide roller, the impurities in the ink are blocked and move towards both sides by the arc-shaped outer shape, and enter the slag collection box through the through groove for collection, avoiding lumping and reaching the ink transfer area, resulting in jamming during the ink transmission process.

[0018] IV. For this double-sided color box printing device, through the cooperation of the ink scraping strip and the sponge strip, during the transmission process, the ink scraping strip restricts the amount of ink on the surface of the ink transfer roller during rotation, and at the same time, the sponge strip smooths the ink on the surface of the ink transfer roller, ensuring the uniformity of the ink on the surface before the ink transfer roller contacts the printing roller, and avoiding unclear patterns on the printed finished product due to uneven ink transfer.

[0019] V. For this double-sided color box printing device, through the cooperation of the outer guide plate and the inner guide plate, while the hot air is conducted obliquely upwards, the hot air is blown towards both sides again, ensuring the comprehensive blowing of the paper, and avoiding partial areas not being dried, resulting in the ink adhering again during winding and affecting the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a double-sided color box printing device of the present invention;

[0021] Figure 2 is a partial schematic structural diagram of a double-sided color box printing device of the present invention;

[0022] Figure 3 is a partial side view of the structure of a double-sided color box printing device of the present invention;

[0023] Figure 4 is a schematic structural diagram of the printing mechanism of the present invention;

[0024] Figure 5 is a partial schematic structural diagram of the printing mechanism of the present invention;

[0025] Figure 6 is a partial structural dissection diagram of the printing mechanism of the present invention;

[0026] Figure 7 is a partial side view of the structural dissection of the printing mechanism of the present invention;

[0027] Figure 8 is a schematic structural diagram of the drying mechanism of the present invention;

[0028] Figure 9 is a bottom view of the structure of the drying mechanism of the present invention.

[0029] In the figure: 1. Frame body; 2. Printing mechanism; 3. Drying mechanism; 4. Rewinding mechanism; 5. Unwinding roller; 6. Connecting plate; 7. Material limiting roller; 8. Connecting beam; 9. Chute plate; 10. Pad ring; 11. Material clamping roller; 12. Elastic pad ring; 13. Material pulling roller; 14. Bottom plate; 201. Ink box; 202. Printing roller; 203. Second motor; 204. Side plate; 205. Ink transfer roller; 206. Rotating shaft; 207. Ink guiding roller; 208. Arc convex plate; 209. Slag collecting box; 210. Ink scraping strip; 211. Sponge strip; 212. Ink blocking strip; 31. Air guiding box; 32. Hot air blower; 33. Side support plate; 34. End cover; 35. Material clamping cylinder; 36. Inner guiding plate; 37. Outer guiding plate; 41. Support plate; 42. Rewinding roller; 43. First motor. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] The first embodiment is as Figures 1 to 4 shown. The present invention provides a technical solution:

[0032] A double-sided color box printing device includes:

[0033] A frame body 1, on the top of the outer side of the frame body 1, an unwinding roller 5 is installed, on the bottom of the outer side of the frame body 1, a rewinding mechanism 4 is installed, and on the bottom of the inner wall of the frame body 1, a connecting beam 8 is fixedly installed, and on the top of the frame body 1, a connecting plate 6 is fixedly installed;

[0034] A printing mechanism 2, which is installed inside the frame body 1, and the printing mechanism 2 is symmetrically installed along the central axis position of the frame body 1;

[0035] A drying mechanism 3, which is symmetrically installed on both sides inside the frame body 1, and the drying mechanism 3 is located below the printing mechanism 2;

[0036] At the central positions of the opposite faces of the connecting beam 8, chute plates 9 are fixedly installed. Oblique chutes are symmetrically formed on the outer sides of the chute plates 9. The material limiting rollers 7 are restricted by the connecting plates 6, so that the paper fed by the feeding roller 5 passes through between the material limiting rollers 7. The paper is conducted and limited by the material limiting rollers 7, and the paper is introduced between the printing mechanism 2 and the drying mechanism 3 from the central position of the frame body 1 for printing and drying. Clamping rollers 11 are slidably installed at the chute positions of the chute plates 9. Pad rings 10 are clamped at the chute positions of the chute plates 9. The pad rings 10 are made of elastic materials. Bottom plates 14 are fixedly installed at the bottoms of the chute plates 9. Horizontal chutes are formed on the outer sides of the bottom plates 14. Pulling rollers 13 are slidably installed at the horizontal chute positions of the bottom plates 14. The printed and dried paper passes through between the clamping rollers 11. The positions of the clamping rollers 11 are restricted by the pad rings 10, so that when the paper stops moving, the clamping rollers 11 clamp the paper. At the same time, during the movement process, due to the acting force of the moving paper on the clamping rollers 11, the clamping rollers 11 compress the pad rings 10, causing the pad rings 10 to be compressed and deformed, enabling the clamping rollers 11 to slide in the shaft grooves. At the same time, the deformed pad rings 10 generate elastic forces, increasing the fitting pressure between the clamping rollers 11 and the paper, and pressing and tensioning the moving paper. Elastic pad rings 12 are clamped at the horizontal chute positions of the bottom plates 14.

[0037] The connecting plates 6 are fixedly installed along the axial center position of the frame body 1. Material limiting rollers 7 are rotatably installed between the connecting plates 6. The number of the material limiting rollers 7 is two. The winding mechanism 4 includes a support plate 41. The support plate 41 is fixedly installed at the bottom outside the frame body 1. The first motor 43 drives the winding roller 42 to wind the printed and dried paper. At the same time, during the winding process, the pulling rollers 13 between the bottom plates 14 are in contact with the paper. At the same time, during the winding process, the winding tension is transmitted to the pulling rollers 13 through the paper, causing the pulling rollers 13 to slide in the through grooves and compress the elastic pad rings 12. After the elastic pad rings 12 are deformed, they generate elastic forces to tighten the paper. A first motor 43 is fixedly installed on the outer side of the support plate 41. The output end of the first motor 43 penetrates through the support plate 41 and extends to the other side thereof. The output end of the first motor 43 is fixedly connected with the winding roller 42 through a coupling.

[0038] Second embodiment. On the basis of the first embodiment, please refer to Figures 5 to 7As shown in the figure, the printing mechanism 2 includes an ink box 201 and side plates 204. The ink box 201 is fixedly installed on the inner wall of the frame body 1, and the side plates 204 are fixedly installed on both sides of the frame body 1. A printing roller 202 is rotatably installed between the side plates 204. A second motor 203 is fixedly installed on the outer side of the side plate 204. The output end of the second motor 203 is connected to one end of the printing roller 202 through a coupling. An arc convex plate 208 is fixedly installed on the inner wall of the ink box 201. The center position on the outer side of the arc convex plate 208 protrudes arc-shaped away from the printing roller 202. Workers pour printing ink into the ink box 201, so that the ink passes through the arc convex plate 208 and reaches the area of the ink guide roller 207. During printing, the second motor 203 drives the printing roller 202 to rotate. At both ends of the side of the arc convex plate 208 close to the printing roller 202, slag collection boxes 209 are fixedly installed. Through holes are evenly opened on the outer side of the slag collection box 209. Through grooves are opened at both ends of the outer side of the arc convex plate 208, and filter holes are evenly opened on the outer side of the arc convex plate 208. Notches are evenly opened at the bottom of the outer side of the arc convex plate 208.

[0039] A ink transfer roller 205 and a rotating shaft 206 are rotatably installed on the inner wall of the ink box 201. The ink transfer roller 205 is located above the rotating shaft 206. The top of the outer side of the ink transfer roller 205 is in contact with the printing roller 202. A ink guide roller 207 is fixedly installed at the center position of the outer side of the rotating shaft 206. Grooves are evenly opened on the outer side of the ink guide roller 207, and the ink guide roller 207 is in close fit with the ink transfer roller 205. By the synchronous rotation of the printing rollers 202 on both sides, the printing roller 202 drives the ink transfer roller 205 to rotate through contact with the ink transfer roller 205. During the rotation of the ink transfer roller 205, the ink guide roller 207 is driven to rotate. The ink is transferred to the surface of the ink transfer roller 205 by the rotation of the ink guide roller 207, and the ink is transferred to the printing roller 202 during rotation, so that the printing roller 202 prints the ink on both sides of the paper during rotation. A scraping strip 210 is fixedly installed at the top of the inner wall of the ink box 201. A sponge strip 211 is fixedly installed at the bottom of the scraping strip 210. The bottom of the sponge strip 211 is in close fit with the top of the ink transfer roller 205. A ink blocking strip 212 is fixedly installed on the inner wall of the ink box 201. The ink blocking strip 212 is located obliquely below the side of the ink transfer roller 205 close to the printing roller 202.

[0040] The third embodiment is based on the first and second embodiments. Please refer to Figures 8 to 9As shown, the drying mechanism 3 includes an air guide box 31, which is fixedly mounted on the inner wall of the frame 1, and a hot air blower 32 is fixedly mounted on the outer side of the air guide box 31. The hot air discharged by the hot air blower first enters the air guide box 31, and then the hot air is discharged from the open end of the air guide box 31. The air outlet end of the hot air blower 32 is connected to the air guide box 31. An end cover 34 is fixedly mounted on the open end of the air guide box 31, and an inner guide plate 36 is fixedly mounted on the inner wall of the end cover 34. The inner guide plate 36 is tilted upward from the inside to the outside, and an outer guide plate 36 is fixedly mounted on the outer side of the end cover 34. 37, the outer guide plate 37 is symmetrically installed along the center position of the axis of the end cover 34, and the inner guide plate 36 on the inner wall of the end cover 34 cooperates with the outer guide plate 37 on the outside to guide the exported hot air, and the hot air is first blown out obliquely upward through the inclined upward inner guide plate, and finally the hot air is conducted to both sides through the outer guide plate 37 to dry the printed surface of the paper, and the end of the outer guide plate 37 away from the end cover 34 is inclined to both sides, and side support plates 33 are fixedly installed on both sides of the bottom of the air guide box 31, and a clamping cylinder 35 is rotatably installed between the side support plates 33.

[0041] When in use, the worker installs the raw paper roll for the color box required for double-sided printing on the unwinding roller 5, so that one end of the raw paper roll passes between the printing mechanisms 2, and the two sides of the paper are printed by the printing mechanisms 2 on both sides. Then the printed paper passes between the drying mechanisms 3, and the printed paper is dried by the drying mechanism 3. At the same time, during the printing and drying process, the paper is limited by the limiting roller 7 and the clamping roller 11. Finally, the paper after double-sided printing and drying is rolled up by the rolling mechanism 4.

[0042] During the printing and drying process, the limiting roller 7 is limited by the connecting plate 6, so that the paper discharged by the feeding roller 5 passes between the limiting rollers 7, and the paper is conducted and limited by the limiting roller 7, so that the paper is introduced from the center position of the frame 1 between the printing mechanism 2 and the drying mechanism 3 for printing and drying. At the same time, the printed and dried paper passes between the clamping rollers 11, and the position of the clamping roller 11 is limited by the gasket 10, so that the clamping roller 11 is clamped by the clamping roller 11 when the paper stops moving. At the same time, during the movement, the force of the paper on the clamping roller 11 in the moving state causes the clamping roller 11 to compress the gasket 10, so that the gasket 10 is compressed and deformed, and the clamping roller 11 slides in the shaft groove. At the same time, the deformed gasket 10 generates elastic force, which increases the fitting pressure between the clamping roller 11 and the paper, and the paper in the moving state is pressed and tightened.

[0043] During the winding process, the first motor 43 drives the winding roller 42 to drive the printed and dried paper to be wound. At the same time, during the winding process, the pulling roller 13 between the bottom plates 14 contacts the paper. At the same time, during the winding process, the winding pulling force is transmitted to the pulling roller 13 through the paper, so that the pulling roller 13 slides in the through groove and compresses the elastic gasket 12. After the elastic gasket 12 is deformed, elastic force is generated, so that the pulling roller 13 tightens the paper.

[0044] In the printing mechanism 2, the worker pours the printing ink into the ink box 201, so that the ink passes through the arc convex plate 208 and reaches the ink guide roller 207 area. During printing, the second motor 203 drives the printing roller 202 to rotate, and the printing rollers 202 on both sides rotate synchronously, so that the printing roller 202 drives the ink transfer roller 205 to rotate through contact with the ink transfer roller 205, and the ink transfer roller 205 drives the ink guide roller 207 to rotate during the rotation, so that the ink is transferred from the rotation of the ink guide roller 207 to the surface of the ink transfer roller 205, and the ink is transferred to the printing roller 202 during the rotation, so that the printing roller 202 prints the ink on both sides of the paper during the rotation.

[0045] In the drying mechanism 3, the hot air discharged by the hot air blower first enters the air guide box 31, and then the hot air is discharged from the open end of the air guide box 31, and the inner guide plate 36 on the inner wall of the end cover 34 cooperates with the outer guide plate 37 on the outside to guide the discharged hot air, and the hot air is first blown out obliquely upward through the inner guide plate inclined upward, and finally the hot air is conducted to both sides through the outer guide plate 37 to dry the printed surface of the paper.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-sided color box printing device, characterized in that: include: A frame (1), a material discharge roller (5) is installed on the top of the outer side of the frame (1), a winding mechanism (4) is installed on the bottom of the outer side of the frame (1), a connecting beam (8) is fixedly installed on the bottom of the inner wall of the frame (1), and a connecting plate (6) is fixedly installed on the top of the frame (1); A printing mechanism (2), the printing mechanism (2) being installed inside the frame (1), the printing mechanism (2) being installed symmetrically along the center position of the axis of the frame (1); A drying mechanism (3), the drying mechanism (3) being symmetrically mounted on both sides of the frame (1), and the drying mechanism (3) being located below the printing mechanism (2); The center positions of the opposite surfaces of the connecting beam (8) are fixedly installed with inclined groove plates (9), the outer sides of the inclined groove plates (9) are symmetrically provided with inclined grooves, and the inclined grooves of the inclined groove plates (9) are slidably installed with clamping rollers (11), and the inclined grooves of the inclined groove plates (9) are clamped with gaskets (10), and the gaskets (10) are made of elastic material. The bottom of the inclined groove plates (9) is fixedly installed with a bottom plate (14), the outer sides of the bottom plate (14) are provided with transverse grooves, and the transverse grooves of the bottom plate (14) are slidably installed with pulling rollers (13), and the transverse grooves of the bottom plate (14) are clamped with elastic gaskets (12).

2. The double-sided color box printing device according to claim 1, characterized in that: The connecting plates (6) are fixedly installed along the central position of the axis of the frame (1), and limiting rollers (7) are rotatably installed between the connecting plates (6), and the number of the limiting rollers (7) is two.

3. The double-sided color box printing device according to claim 2, characterized in that: The winding mechanism (4) comprises a support plate (41), wherein the support plate (41) is fixedly mounted on the bottom of the outer side of the frame body (1), and a first motor (43) is fixedly mounted on the outer side of the support plate (41), wherein the output end of the first motor (43) passes through the support plate (41) and extends to the other side thereof, and the output end of the first motor (43) is fixedly connected to a winding roller (42) via a coupling.

4. The double-sided color box printing device according to claim 3, characterized in that: The printing mechanism (2) comprises an ink box (201) and a side plate (204); the ink box (201) is fixedly mounted on the inner wall of the frame (1); the side plates (204) are fixedly mounted on both sides of the frame (1); a printing roller (202) is rotatably mounted between the side plates (204); a second motor (203) is fixedly mounted on the outer side of the side plate (204); and an output end of the second motor (203) is connected to one end of the printing roller (202) via a coupling.

5. The double-sided color box printing device according to claim 4, characterized in that: An arc convex plate (208) is fixedly mounted on the inner wall of the ink box (201), the center position of the outer side of the arc convex plate (208) is arc-shaped and convex toward the side away from the printing roller (202), and slag collecting boxes (209) are fixedly mounted on both ends of the arc convex plate (208) on the side close to the printing roller (202).

6. The double-sided color box printing device according to claim 5, characterized in that: The outer side of the slag collecting box (209) is evenly provided with through holes, both ends of the outer side of the arc convex plate (208) are provided with through grooves, and the outer side of the arc convex plate (208) is evenly provided with filter holes, and the bottom of the outer side of the arc convex plate (208) is evenly provided with notch grooves.

7. The double-sided color box printing device according to claim 6, characterized in that: An ink transfer roller (205) and a rotating shaft (206) are rotatably mounted on the inner wall of the ink box (201); the ink transfer roller (205) is located above the rotating shaft (206), and the top of the outer side of the ink transfer roller (205) is in contact with the printing roller (202); an ink guide roller (207) is fixedly mounted at the center position of the outer side of the rotating shaft (206); grooves are evenly arranged on the outer side of the ink guide roller (207), and the ink guide roller (207) is tightly fitted with the ink transfer roller (205).

8. The double-sided color box printing device according to claim 7, characterized in that: An ink scraper strip (210) is fixedly mounted on the top of the inner wall of the ink box (201), a sponge strip (211) is fixedly mounted on the bottom of the ink scraper strip (210), the bottom of the sponge strip (211) is tightly fitted with the top of the ink transfer roller (205), and an ink blocking strip (212) is fixedly mounted on the inner wall of the ink box (201), the ink blocking strip (212) is located obliquely below the ink transfer roller (205) on a side close to the printing roller (202).

9. The double-sided color box printing device according to claim 8, characterized in that: The drying mechanism (3) comprises an air guide box (31), the air guide box (31) being fixedly mounted on the inner wall of the frame (1), and a hot air blower (32) being fixedly mounted on the outer side of the air guide box (31), the air outlet end of the hot air blower (32) being connected to the air guide box (31), an end cover (34) being fixedly mounted on the open end of the air guide box (31), an inner guide plate (36) being fixedly mounted on the inner wall of the end cover (34), and the inner guide plate (36) being inclined upward from the inside to the outside.

10. The double-sided color box printing device according to claim 9, characterized in that: An outer guide plate (37) is fixedly mounted on the outer side of the end cover (34). The outer guide plate (37) is symmetrically mounted along the center position of the axis of the end cover (34), and one end of the outer guide plate (37) away from the end cover (34) is inclined toward both sides. Side support plates (33) are fixedly mounted on both sides of the bottom of the air guide box (31), and a clamping barrel (35) is rotatably mounted between the side support plates (33).

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