Turnover printing device and double-sided printing machine

Abstract

The utility model provides a turn-over printing device which is characterized in that a turn-over assembly comprises a first turn-over guide roller and a second turn-over guide roller, the first turn-over guide roller is rotatably mounted on a rack and is configured to receive and tension materials, and the second turn-over guide roller is rotatably mounted on the rack and is located between a printing piece and the first turn-over guide roller; and the turnover mechanism is further configured to receive the materials conveyed by the first turnover material guide roller and turn over the materials. The drying assembly comprises a drying box, and the drying box is installed on the rack and is configured to dry the materials after the materials are printed through the printing piece. The conveying assembly is installed on the machine frame and is configured to output the printed and dried materials. The utility model further provides a double-sided printing machine, the double-sided printing machine comprises the turn-over printing device and a coplanar printing device, and the coplanar printing device comprises the rack, the printing assembly, the drying assembly and the conveying assembly. The turn-over printing device provided by the utility model is beneficial to improving the production efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of printing equipment, and in particular relates to a flip printing device and a double-sided printing machine. Background Art

[0002] When printing on rolled paper, a printing roller is usually required. The paper passes through the surface of the printing roller, and under the action of the printing roller, the paper passing through the surface can be continuously printed. In the related art, during the printing process, the printing roller can only print on one side of the paper. When it is necessary to print on both sides of the paper, the paper needs to be unloaded from the machine and turned over, which is time-consuming and labor-intensive, and is easy to damage the paper. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a reversal printing device and a double-sided printing machine to solve the technical problem in the prior art that when printing on both sides of a paper, the paper needs to be unloaded from the machine, resulting in reduced efficiency.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a flip printing device, comprising:

[0005] frame;

[0006] A printing assembly, the printing assembly comprising a printing part, and the printing part is installed on the frame;

[0007] A flipping assembly, the flipping assembly comprising a first flipping guide roller and a second flipping guide roller, the first flipping guide roller being rotatably mounted on the frame and configured to receive the material and tension the material, the second flipping guide roller being rotatably mounted on the frame and located between the printed piece and the first flipping guide roller, and further configured to receive the material transported by the first flipping guide roller and flip the material;

[0008] A drying assembly, the drying assembly comprising a drying box, the drying box being mounted on the frame and configured to dry the material after the material is printed by the printing piece;

[0009] A transport component is installed on the frame and is configured to output the printed and dried materials.

[0010] Optionally, the flipping assembly also includes a third flipping guide roller and a fourth flipping guide roller, the third flipping guide roller is mounted on the frame and is configured to receive materials, the fourth flipping guide roller is mounted on the frame and is located between the first flipping guide roller and the third flipping guide roller, and is further configured to tension the material between the first flipping guide roller and the third flipping guide roller.

[0011] Optionally, the printing component also includes a first printing tensioning roller, a second printing tensioning roller, an adjusting member and a third printing tensioning roller, the first printing tensioning roller and the second printing tensioning roller both being rotatably mounted on the frame, the first printing tensioning roller being located between the printing member and the second printing tensioning roller, and being configured to tension the material between the printing member and the second printing tensioning roller, the adjusting member being mounted on the frame, the third printing tensioning roller being rotatably mounted on the adjusting member, and being configured to tension the material between the drying box and the second printing tensioning roller, and being further configured to move relative to the frame driven by the adjusting member.

[0012] Optionally, the printing assembly further comprises a fourth printing tensioning roller, which is rotatably mounted on the frame and is located between the printing piece and the second flipping guide roller, and is further configured to tension the material between the printing piece and the second flipping guide roller.

[0013] Optionally, the adjusting member includes a first adjusting seat, an adjusting screw and a second adjusting seat, the first adjusting seat is mounted on the frame, the adjusting screw is rotatably mounted on the first adjusting seat, the second adjusting seat is threadedly connected to one end of the adjusting screw close to the third printing tensioning roller, and is configured to drive the third printing tensioning roller to move relative to the frame through the adjusting screw.

[0014] Optionally, the printing element includes a driver and a printing roller, the driver is mounted on the frame, the printing roller is rotatably mounted on an output end of the driver and is configured to move relative to the frame under the drive of the driver.

[0015] Optionally, the drying assembly further includes two groups of drying guide rollers and a drying tension roller, the two groups of drying guide rollers can be rotatably installed in the drying box, and the drying tension roller can be rotatably installed between the two groups of drying guide rollers.

[0016] Optionally, the drying assembly further comprises a cooling roller, which is rotatably mounted on the frame and is located between the drying box and the transport assembly.

[0017] Optionally, the transport assembly includes a first transport guide roller, a second transport guide roller, a third transport guide roller and a fourth transport guide roller. The first transport guide roller, the second transport guide roller, the third transport guide roller and the fourth transport guide roller can be rotatably mounted on the frame and are configured to output the material from the drying box.

[0018] The present application also provides a double-sided printing machine, comprising the flip printing device and the same-side printing device, wherein the same-side printing device comprises the frame, the printing component, the drying component and the transport component.

[0019] The beneficial effects of the flip printing device provided by the present application are:

[0020] The flip printing device provided in the embodiment of the present application uses a first flip material guide roller and a second flip material guide roller to flip the material and print the unprinted side of the material through the printing roller. Compared with the related art, after printing one side of the material, the material is transported to the device, and both sides of the material can be printed without unloading the material, which helps to improve production efficiency and prevent the material from being damaged due to unloading.

[0021] The beneficial effects of the double-sided printing machine provided by the present application are:

[0022] The double-sided printing machine provided in the present application adopts a flip printing device and a same-side printing device, and can print on both sides of the material on the same production line without taking the material off the machine, which helps to improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 A plan view of a flip printing device provided in an embodiment of the present application;

[0025] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0026] Figure 3 A plan view of a same-side printing device of a double-sided printing press provided in an embodiment of the present application;

[0027] Figure 4 A plan view of a double-sided printing machine provided in an embodiment of the present application.

[0028] Among them, the reference numerals in the figure are:

[0029] 1. Frame;

[0030] 2. Printing assembly; 21. Printing element; 211. Driver; 212. Printing roller; 22. First printing tension roller; 23. Second printing tension roller; 24. Adjustment element; 241. First adjustment seat; 242. Adjustment screw; 243. Second adjustment seat; 25. Third printing tension roller; 26. Fourth printing tension roller;

[0031] 3. Turning assembly; 31. First turning guide roller; 32. Second turning guide roller; 33. Third turning guide roller; 34. Fourth turning guide roller;

[0032] 4. Drying assembly; 41. Drying box; 42. Drying guide roller group; 43. Drying tension roller; 44. Cooling roller;

[0033] 5. Transport assembly; 51. First transport guide roller; 52. Second transport guide roller; 53. Third transport guide roller; 54. Fourth transport guide roller. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] like Figure 1 to Figure 2As shown, a flip printing device is provided in an embodiment of the present application, including a frame 1, a printing component 2, a flip component 3, a drying component 4 and a transport component 5. The printing component 2 includes a printing piece 21, and the printing piece 21 is installed on the frame 1. The flip component 3 includes a first flip guide roller 31 and a second flip guide roller 32. The first flip guide roller 31 is rotatably installed on the frame 1 and is configured to receive materials and tension the materials. The second flip guide roller 32 is rotatably installed on the frame 1 and is located between the printing piece 21 and the first flip guide roller 31. It is also configured to receive the materials transported by the first flip guide roller 31 and flip the materials. The drying component 4 includes a drying box 41, which is installed on the frame 1 and is configured to dry the materials after the materials are printed by the printing piece 21. The transport component 5 is installed on the frame 1 and is configured to output the printed and dried materials.

[0039] It should be noted that in this embodiment, the material is set as paper as an example for description. Of course, in other embodiments, according to actual application requirements, the material can also be set as other materials, which is not limited here.

[0040] Specifically, in this embodiment, the two sides of the paper are named as the front side and the back side, respectively. When using the device, first use an external printing device to print the front side of the paper. After printing the front side of the paper, the front side of the paper is facing up, and the front side of the paper is in contact with the lower surface of the first flip guide roller 31. The paper is laid from the lower surface of the first flip guide roller 31 to the upper surface of the second flip guide roller 32, and the front side of the paper is in contact with the upper surface of the second flip guide roller 32. The paper is laid from the lower surface of the second flip guide roller 32 to the lower surface of the printing roller 212, and the flip side of the paper is in contact with the lower surface of the printing roller 212, and the front side is facing down. After the back side of the paper is printed by the printing roller 212, the paper enters the drying box 41 for drying and is output through the transport component 5.

[0041] The flip printing device provided in the present application uses a first flip material guide roller 31 and a second flip material guide roller 32 to flip the material, and print the unprinted side of the material through the printing roller 212. Compared with the related art, after printing one side of the material, the material is transported to the device, and both sides of the material can be printed without unloading the material, which helps to improve production efficiency and prevent the material from being damaged due to unloading.

[0042] In one embodiment of the present application, see Figure 1 to Figure 2The turning assembly 3 also includes a third turning guide roller 33 and a fourth turning guide roller 34. The third turning guide roller 33 is installed on the frame 1 and is configured to receive materials. The fourth turning guide roller 34 is installed on the frame 1 and is located between the first turning guide roller 31 and the third turning guide roller 33. It is also configured to tension the materials between the first turning guide roller 31 and the third turning guide roller 33.

[0043] Specifically, when the device is used, the front side of the paper is first printed using an external printing device. After printing the front side of the paper, the front side of the paper is turned up, and the front side of the paper contacts the upper surface of the third flip guide roller 33. The paper is laid from the upper surface of the third flip guide roller 33 to the lower surface of the fourth flip guide roller 34, and the front side of the paper contacts the lower surface of the fourth flip guide roller 34. The paper is laid from the lower surface of the fourth flip guide roller 34 to the lower surface of the first flip guide roller 31.

[0044] With such a configuration, the third flip material guide roller 33 can be used to receive materials from an external printing device. Moreover, after receiving the materials from the external printing device, the third flip material guide roller 33 can also tension the materials between the external printing device and the fourth flip material guide roller 34 to prevent the materials from folding between the external printing device and the fourth flip material guide roller 34, thereby facilitating the transportation of materials. The fourth flip material guide roller 34 can be used to receive materials from the third flip material guide roller 33. Moreover, after receiving the materials from the third flip material guide roller 33, the fourth flip material guide roller 34 can also tension the materials between the first flip material guide roller 31 and the third flip material guide roller 33 to prevent the materials from folding between the first flip material guide roller 31 and the third flip material guide roller 33, thereby facilitating the transportation of materials. In addition, the fourth turning guide roller 34 can guide the material to avoid the printing roller 212, which can prevent the material from interfering with the printing roller 212 compared to the material being directly laid from the third turning guide roller 33 to the first turning guide roller 31.

[0045] In one embodiment of the present application, please refer to Figure 1 to Figure 2The printing assembly 2 further includes a first printing tension roller 22, a second printing tension roller 23, an adjusting member 24 and a third printing tension roller 25. Both the first printing tension roller 22 and the second printing tension roller 23 can be rotatably mounted on the frame 1. The first printing tension roller 22 is located between the printing member 21 and the second printing tension roller 23 and is configured to tension the material between the printing member 21 and the second printing tension roller 23. The adjusting member 24 is mounted on the frame 1. The third printing tension roller 25 is rotatably mounted on the adjusting member 24 and is configured to tension the material between the drying box 41 and the second printing tension roller 23 and is also configured to move relative to the frame 1 under the drive of the adjusting member 24. The printing assembly 2 further includes a fourth printing tension roller 26, which is rotatably mounted on the frame 1 and is located between the printing member 21 and the second flip guide roller 32 and is also configured to tension the material between the printing member 21 and the second flip guide roller 32.

[0046] Specifically, when the device is used, during the process of the paper being laid from the upper surface of the second flip guide roller 32 to the lower surface of the printing roller 212, the paper passes through the upper surface of the fourth printing tension roller 26, and at this time, the back of the paper contacts the upper surface of the fourth printing tension roller 26. The paper is laid from the lower surface of the printing roller 212 to the left surface of the first printing tension roller 22, and at this time, the back of the paper contacts the left surface of the first printing tension roller 22. The paper is laid from the left surface of the first printing tension roller 22 to the right surface of the second printing tension roller 23. At this time, the front of the paper contacts the right surface of the second printing tension roller 23. The paper is laid from the right surface of the second printing tension roller 23 to the left surface of the third printing roller 212, and at this time, the back of the paper contacts the left surface of the third printing tension roller 25. The paper then enters the drying box 41 for drying and is output through the transport component 5.

[0047] With such a configuration, the first printing tension roller 22 can be used to tension the material between the second printing tension roller 23 and the printing roller 212, which is convenient for transporting the material. The second printing tension roller 23 can be used to tension the material between the first printing tension roller 22 and the third printing tension roller 25, which is convenient for transporting the material. The third printing tension roller 25 can be used to tension the material between the second printing tension roller 23 and the drying box 41, which is convenient for transporting the material. The fourth printing tension roller 26 can be used to tension the material between the first flip guide roller 31 and the printing roller 212, which is convenient for transporting the material. The adjusting member 24 can be used to drive the third printing tension roller 25 to move relative to the frame 1, so that the tension of the material between the printing roller 212 and the drying box 41 can be adjusted, so that the material between the printing roller 212 and the drying box 41 is always tensioned, preventing the material from folding, and facilitating the transportation of the material. With the cooperation of the first printing tension roller 22 and the second printing tension roller 23, the travel of the material can be increased compared with the case where the material is directly laid from the printing roller 212 to the third printing tension roller 25. When adjusting the tension of the material between the printing roller 212 and the drying box 41, the adjustment member 24 is prevented from adjusting the third printing tension roller 25 to affect the printing effect of the printing roller 212.

[0048] In one embodiment of the present application, see Figure 1 to Figure 2 The adjusting member 24 includes a first adjusting seat 241, an adjusting screw 242 and a second adjusting seat 243. The first adjusting seat 241 is installed on the frame 1, the adjusting screw 242 is rotatably installed on the first adjusting seat 241, and the second adjusting seat 243 is screwed to one end of the adjusting screw 242 close to the third printing tension roller 25, and is configured to drive the third printing tension roller 25 to move relative to the frame 1 through the adjusting screw 242.

[0049] Specifically, when the tension of the third printing tension roller 25 on the material needs to be adjusted, the staff rotates the adjusting screw 242 to rotate the adjusting screw 242 relative to the first adjusting seat 241. The second adjusting seat 243 is screwed to the adjusting screw 242 and forms a limit with the first adjusting seat 241. Driven by the adjusting screw 242, the second adjusting seat 243 moves relative to the first adjusting seat 241.

[0050] In this configuration, by rotating the adjusting screw 242, the second adjusting seat 243 moves relative to the first adjusting seat 241, so that the third printing tension roller 25 moves relative to the frame 1. Under the action of the third printing tension roller 25, the tension of the material between the printing roller 212 and the drying box 41 can be adjusted, so that the material between the printing roller 212 and the drying box 41 is always tensioned, preventing the material from folding, and facilitating the transportation of the material.

[0051] In one embodiment of the present application, see Figure 1 to Figure 2The printing element 21 includes a driver 211 and a printing roller 212 . The driver 211 is mounted on the frame 1 . The printing roller 212 is rotatably mounted on the output end of the driver 211 and is configured to move relative to the frame 1 under the drive of the driver 211 .

[0052] With such arrangement, the printing roller 212 is moved relative to the frame 1 through the driver 211, so that the material is always in close contact with the printing roller 212, which helps to improve the printing effect of the device and achieve high molding quality.

[0053] In one embodiment of the present application, please refer to Figure 1 to Figure 2 The drying assembly 4 also includes two groups of drying guide rollers 42 and a drying tension roller 43. The two groups of drying guide rollers 42 can be rotatably installed in the drying box 41, and the drying tension roller 43 can be rotatably installed between the two groups of drying guide rollers.

[0054] In this way, two sets of drying guide rollers 42 are used to increase the travel of the material in the drying box 41, so that the material is fully dried in the drying box 41, thereby helping to improve the molding quality of the material. The drying tensioning roller 43 is used to tension the material between the two sets of drying guide rollers 42 to prevent the material from folding between the two sets of drying guide rollers 42, thereby facilitating material transportation.

[0055] Optionally, the drying guide roller group 42 is composed of a plurality of drying guide rollers (not shown in the figure), and the plurality of drying guide rollers are arranged at intervals.

[0056] In one embodiment of the present application, see Figure 1 to Figure 2 The drying component 4 also includes a cooling roller 44 , which is rotatably mounted on the frame 1 and is located between the drying box 41 and the transport component 5 .

[0057] With such arrangement, the cooling roller 44 is used to cool the materials output from the drying box 41, thereby preventing the materials from scalding the workers due to high temperature, effectively protecting the workers, and helping to improve the safety performance of the device.

[0058] In one embodiment of the present application, see Figure 1 to Figure 2 The transport assembly 5 includes a first transport guide roller 51, a second transport guide roller 52, a third transport guide roller 53 and a fourth transport guide roller 54. The first transport guide roller 51, the second transport guide roller 52, the third transport guide roller 53 and the fourth transport guide roller 54 can be rotatably mounted on the frame 1 and are configured to output the material from the drying box 41.

[0059] With such arrangement, with the cooperation of the first transport guide roller 51, the second transport guide roller 52, the third transport guide roller 53 and the fourth transport guide roller 54, the material can be stably output from the drying box 41 to the external equipment, which helps to improve the convenience of use. The first transport guide roller 51 can be used to tension the material between the cooling roller 44 and the second transport guide roller 52, which is convenient for transporting the material. The second transport guide roller 52 can be used to tension the material between the first transport guide roller 51 and the third transport guide roller 53, which is convenient for transporting the material. The third transport guide roller 53 can be used to tension the material between the second transport guide roller 52 and the fourth transport guide roller 54, which is convenient for transporting the material. The fourth transport guide roller 54 can be used to tension the material between the third transport guide roller 53 and the external equipment, which is convenient for transporting the material.

[0060] like Figures 1 to 4 As shown, the present application also provides a double-sided printing machine, including a flip printing device and a same-side printing device, and the same-side printing device includes a frame 1, a printing component 2, a drying component 4 and a transport component 5.

[0061] Specifically, when the device is used, the front side of the paper is first printed using the same-side printing device. The paper is laid on the left side of the first printing tension roller 22 through the upper surface of the third printing tension roller 25, and the front side of the paper is in contact with the left side of the first printing tension roller 22. The paper is laid from the left side of the first printing tension roller 22 to the lower surface of the printing roller 212, and the front side of the paper is in contact with the lower surface of the printing roller 212. The printing roller 212 prints the front side of the paper. The paper is laid from the lower surface of the printing roller 212 to the right side of the fourth printing tension roller 26, and the front side of the paper is in contact with the right side of the fourth printing tension roller 26. The paper is laid from the right side of the fourth printing tension roller 26 into the drying box 41, and is transported to the first flip guide roller 31 of the flip printing device through the drying box 41, the cooling roller 44, the first transport guide roller 51, the second transport guide roller 52, the third transport guide roller 53 and the fourth transport guide roller 54 in sequence.

[0062] The double-sided printing machine provided in the present application adopts a flip printing device and a same-side printing device, and can print on both sides of the material on the same production line without taking the material off the machine, which helps to improve production efficiency.

[0063] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A flip printing device, characterized in that: include: Rack(1); A printing assembly (2), the printing assembly (2) comprising a printing part (21), the printing part (21) being mounted on the frame (1); A turning assembly (3), the turning assembly (3) comprising a first turning guide roller (31) and a second turning guide roller (32), the first turning guide roller (31) being rotatably mounted on the frame (1) and being configured to receive material and tension the material, the second turning guide roller (32) being rotatably mounted on the frame (1) and being located between the printed piece (21) and the first turning guide roller (31), and being further configured to receive material transported by the first turning guide roller (31) and turn the material over; A drying component (4), the drying component (4) comprising a drying box (41), the drying box (41) being mounted on the frame (1) and configured to dry the material after the material is printed by the printing piece (21); A transport component (5), the transport component (5) is installed on the frame (1) and is configured to output the printed and dried materials.

2. The reverse printing device according to claim 1, characterized in that: The turning assembly (3) further comprises a third turning guide roller (33) and a fourth turning guide roller (34); the third turning guide roller (33) is mounted on the frame (1) and is configured to receive materials; the fourth turning guide roller (34) is mounted on the frame (1) and is located between the first turning guide roller (31) and the third turning guide roller (33); and is further configured to tension the materials between the first turning guide roller (31) and the third turning guide roller (33).

3. The reverse printing device according to claim 1, characterized in that: The printing assembly (2) further comprises a first printing tensioning roller (22), a second printing tensioning roller (23), an adjusting member (24) and a third printing tensioning roller (25); the first printing tensioning roller (22) and the second printing tensioning roller (23) are both rotatably mounted on the frame (1); the first printing tensioning roller (22) is located between the printing member (21) and the second printing tensioning roller (23) and is configured to tension the material between the printing member (21) and the second printing tensioning roller (23); the adjusting member (24) is mounted on the frame (1); the third printing tensioning roller (25) is rotatably mounted on the adjusting member (24) and is configured to tension the material between the drying box (41) and the second printing tensioning roller (23); and is further configured to move relative to the frame (1) driven by the adjusting member (24).

4. The reverse printing device according to claim 3, characterized in that: The printing assembly (2) further comprises a fourth printing tensioning roller (26), which is rotatably mounted on the frame (1) and is located between the printing piece (21) and the second turning guide roller (32), and is further configured to tension the material between the printing piece (21) and the second turning guide roller (32).

5. The reverse printing device according to claim 3, characterized in that: The adjusting member (24) comprises a first adjusting seat (241), an adjusting screw (242) and a second adjusting seat (243); the first adjusting seat (241) is mounted on the frame (1); the adjusting screw (242) is rotatably mounted on the first adjusting seat (241); the second adjusting seat (243) is screwed to an end of the adjusting screw (242) close to the third printing tension roller (25), and is configured to drive the third printing tension roller (25) to move relative to the frame (1) via the adjusting screw (242).

6. The reverse printing device according to claim 1, characterized in that: The printing element (21) comprises a driver (211) and a printing roller (212); the driver (211) is mounted on the frame (1); the printing roller (212) is rotatably mounted on an output end of the driver (211) and is configured to move relative to the frame (1) under the drive of the driver (211).

7. The reverse printing device according to claim 1, characterized in that: The drying assembly (4) further comprises two groups of drying guide rollers (42) and a drying tension roller (43); the two groups of drying guide rollers (42) can be rotatably mounted in the drying box (41); and the drying tension roller (43) can be rotatably mounted between the two groups of drying guide rollers.

8. The reverse printing device according to claim 1, characterized in that: The drying assembly (4) further comprises a cooling roller (44), wherein the cooling roller (44) is rotatably mounted on the frame (1) and is located between the drying box (41) and the transport assembly (5).

9. The reverse printing device according to claim 1, characterized in that: The transport assembly (5) comprises a first transport guide roller (51), a second transport guide roller (52), a third transport guide roller (53) and a fourth transport guide roller (54); the first transport guide roller (51), the second transport guide roller (52), the third transport guide roller (53) and the fourth transport guide roller (54) are all rotatably mounted on the frame (1) and are configured to output materials from the drying box (41).

10. A double-sided printing machine, characterized in that: It comprises a reversing printing device and a same-side printing device as described in any one of claims 1 to 9, wherein the same-side printing device comprises the frame (1), the printing component (2), the drying component (4) and the transport component (5).

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