Upper and lower double-layer shaftless one-piece printing machine

Abstract

The utility model relates to the technical field related to intaglio printing, in particular to an upper and lower double-layer shaftless conjoined printing machine which comprises at least one rack, two printing units which are arranged up and down in spatial distribution are installed on the rack, and the two printing units conduct printing action on one face or two faces of a printing base material in sequence. The two drying oven structures are installed on the rack and used for drying the printing base materials after the printing base materials are subjected to primary printing and secondary printing correspondingly. According to the upper and lower double-layer shaftless conjoined printing machine provided by the embodiment of the utility model, the overall structure of a single set of machine is compact, the occupied area of the single set of machine is effectively saved, and the single set of machine can be connected side by side at intervals during multi-color printing, so that the occupied area of the printing machine is further saved; single-side two-color printing or front and back printing can be completed through a single set of printing machine, upper and lower double-layer printing, drying and other functional systems are reasonable in layout and do not interfere with one another, and the requirement for combined printing of multiple sets of machines can be met.

Description

Technical Field

[0001] This utility model relates to the technical field of gravure printing, specifically a double-layer shaftless integrated printing machine. Background Technology

[0002] The existing integrated gravure printing machine is connected to the substrate production equipment. The substrate produced or the substrate on the unwinding machine is sequentially transported to various functional systems such as tension adjustment, printing, and drying through the winding and traction of each cylindrical roller in the machine to print on the substrate. Finally, the substrate is exported, completing the printing equipment for the substrate.

[0003] Please see Figures 7-10 The existing integrated gravure printing machine is a printing equipment that requires a corresponding printing machine to complete the printing of several colors on the front and several colors on the back of the substrate. Each printing machine is equipped with a printing system and a drying system. The drying systems are arranged on the same side. When the printing machines are working, they need to be arranged side by side and connected at intervals.

[0004] Multiple printing presses occupy a large area, increasing production costs for enterprises; the connection of multiple printing presses leads to large deviations in installation accuracy, and the printing parts of each printing press are relatively far apart, increasing the difficulty of aligning the printed pattern on the substrate, reducing alignment accuracy and printing quality; single printing presses have poor stability, reducing the installation and fitting accuracy of various components, increasing machine movement and noise pollution, etc. Utility Model Content

[0005] The purpose of this invention is to provide a double-layer shaftless integrated printing machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A double-layer shaftless integrated printing press, including:

[0008] At least one frame, on which two printing units are arranged vertically in a spatial distribution, the two printing units sequentially performing printing operations on one or both sides of a substrate.

[0009] An oven structure, mounted on the frame, is used to dry the substrate after it has been printed once and twice.

[0010] The double-layer shaftless integrated printing machine described above: the frame is also equipped with a rotary guide component;

[0011] When the two printing units perform printing operations on one side of the printing substrate in succession, the printing substrate passes through the printing units from the same side of the two printing units under the action of the rotary guide.

[0012] When the two printing units perform printing operations on both sides of the printing substrate in succession, the printing substrate passes through the printing units from different sides of the two printing units.

[0013] The double-layer shaftless integrated printing press described above: the oven structure includes a first oven and a second oven, which are symmetrically mounted on the frame.

[0014] The double-layer shaftless integrated printing press described above: the first oven includes:

[0015] The main body of the single-color drying oven is mounted on the frame. Multiple rollers for guiding the printing substrate are rotatably installed on the inner side of the main body of the single-color drying oven. The main body of the single-color drying oven also has through grooves for the printing substrate to enter and exit.

[0016] The second oven includes:

[0017] The main body of the two-color drying oven is mounted on the frame. Multiple rollers for guiding the printing substrate are rotatably installed on the inner side of the main body of the two-color drying oven. The main body of the two-color drying oven also has through grooves for the printing substrate to enter and exit.

[0018] The above-described double-layer shaftless integrated printing press: the two printing units are respectively a one-color printing part and a two-color printing part, wherein:

[0019] The single-color printing part includes a single-color printing plate roller and a single-color rubber roller assembly rotatably mounted on the frame. A printing area for the printing substrate to pass through is formed between the single-color printing plate roller and the single-color rubber roller assembly. A first printing doctor blade assembly is provided on the side end of the single-color printing plate roller, and a single-color ink tray lifting assembly is also provided on the frame below the single-color printing plate roller.

[0020] Two-color printing includes a two-color printing plate roller and a two-color rubber roller assembly rotatably mounted on the frame. A printing area for the substrate to pass through is formed between the two-color printing plate roller and the two-color rubber roller assembly. A second printing doctor blade assembly is provided on the side end of the two-color printing plate roller, and a two-color ink tray lifting assembly is also provided on the frame below the two-color printing plate roller.

[0021] As described above, in the double-layer shaftless integrated printing machine: swing arm assemblies are installed on both sides of the first-color roller assembly on the frame, the printing substrate abuts against the two swing arm assemblies, and the printing substrate passes through the swing arm assemblies for first-color printing.

[0022] Two-color reverse printing color matching adjustment swing rollers and two-color front printing color matching adjustment swing rollers are respectively installed on the frame at positions on both sides of the two-color rubber roller assembly.

[0023] The substrate is wound around the two-color reverse printing adjustment roller for reverse printing of the second color, or

[0024] The substrate is wound around the two-color front printing color matching adjustment roller to perform the front printing of the second color. The rotation angle of the two-color front or back printing color matching adjustment roller is adjusted. The position of the printed pattern in the second printing unit can be aligned and adjusted based on the position of the printed pattern in the first printing unit to ensure the accuracy of the position of the two printed patterns.

[0025] The above-described double-layer shaftless integrated printing press: the frame includes:

[0026] The lower body has a rectangular tube connecting it to a foot anti-slip iron plate.

[0027] The upper fuselage is connected to the lower fuselage via a four-way connector between the upper and lower fuselage.

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows: The single-unit machine structure of the double-layer shaftless integrated printing machine provided in this embodiment is compact, effectively saving the floor space of a single unit machine. When performing multi-color printing, the single units can be connected side by side with intervals, further saving the floor space of the printing machine. Due to the double-layer printing structure, the overall weight of the machine is increased, the stability of the machine operation is better, and the impact of vibration during machine operation on the installation and matching accuracy of various parts and the printing quality is reduced. The distance between each printing unit is relatively close, and the path of the substrate is relatively short, effectively reducing the accumulation of errors caused by the long path. The alignment of the printed pattern position is more accurate, and the printing color registration effect is improved. A single printing machine can complete single-sided two-color printing or front and back printing, and the double-layer printing and drying functions are reasonably laid out and do not interfere with each other. It can also meet the needs of multi-unit machine combination printing. While meeting the high-speed printing requirements, the substrate can be wound twice in the two drying oven structures to obtain secondary drying, ensuring a good drying effect. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a printing substrate with one side facing out and the other side facing out.

[0030] Figure 2 This is a schematic diagram showing the two front-side printing substrates being wrapped around each other.

[0031] Figure 3 This is a schematic diagram of the printing substrate with three front sides and one back side.

[0032] Figure 4 This is a schematic diagram showing the two front and two back printing substrates being wrapped around each other.

[0033] Figure 5 This is a schematic diagram of the four-sided printing substrate being wrapped around.

[0034] Figure 6 This is an isometric view of the entire machine structure when used as a single unit.

[0035] Figure 7 This is a schematic diagram of the structure of a printing press in the prior art when used as a single unit.

[0036] Figure 8 This is a schematic diagram of a printing substrate with one front and one back side wrapped around each other in the prior art.

[0037] Figure 9 This is a schematic diagram of two front-side printing substrates being wrapped around each other in the prior art.

[0038] Figure 10 This is a schematic diagram of the two-sided and two-sided printing substrate being wrapped around in the existing technology.

[0039] In the diagram: 1-Upper machine body, 2-Roller mounting shaft, 3-Roller, 4-Upper connection of support iron, 5-Short support iron, 6-Sheet metal for upper roller mounting in drying oven, 7-Main body of two-color drying oven, 8-Door of two-color drying oven, 9-Printing substrate, 10-Two-color printing plate roller, 11-Lifting assembly of two-color ink tray, 12-Roller mounting square piece, 13-First printing squeegee assembly, 14-Long support iron, 15-Lower machine body, 16-Anti-slip iron plate for machine feet, 17-Rectangular tube connecting to lower machine body, 18-Single-color printing plate roller, 19-Single-color rubber roller assembly, 20-Second printing squeegee assembly, 21-Drying oven mounting feet, 22-Two-color rubber roller assembly, 23- 24-Sheet metal mounting of lower roller in single-color drying oven; 25-Swing arm assembly; 26-Lifting assembly of single-color ink tray; 27-Main body of single-color drying oven; 28-Upper body connecting square tube; 29-Supporting iron connecting square piece; 30-Upper and lower body connecting square piece; 31-Two-color reverse printing color matching adjustment swing roller; 32-Two-color front printing color matching adjustment swing roller; 33-Sheet metal mounting of lower roller in two-color drying oven; 34-Tension tension adjustment assembly; 35-Main body connection; 36-Lower body connection; 37-Roller bracket for three-color reverse printing; 38-Color matching adjustment swing roller for three-color printing; 39-Screw with handwheel; 40-Cylinder. Detailed Implementation

[0040] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0041] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0042] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0043] Please see Figures 1-6 In this embodiment of the invention, the double-layer shaftless integrated printing machine includes:

[0044] At least one frame is provided, on which two printing units are arranged vertically in a spatial distribution. The two printing units sequentially perform printing operations on one or both sides of the substrate 9. The frame includes a lower body 15, on which a foot anti-slip iron plate 16 is connected via a lower body connecting rectangular tube 17. It also includes an upper body 1 connected to the lower body 15 via an upper and lower body connecting square piece 30. Preferably, the upper body 1 and the lower body 15 are further connected by an upper body connecting square tube 28 for effective fixation and support of the upper body 1.

[0045] Two drying oven structures are installed on the frame, and the two drying oven structures are respectively used to dry the printing substrate 9 after the first printing and the second printing.

[0046] The two printing surfaces of the substrate 9 are defined as surface A and surface B. The frame is also equipped with a tension adjustment component 34. After the substrate 9 obtains a suitable tension through the tension adjustment component 34, it passes through one of the printing units. The printing unit prints on surface A of the substrate 9. After drying in one of the oven structures, it enters another printing unit for secondary printing. The printing here depends on whether the substrate 9 enters on surface A or surface B. After printing, the substrate 9 passes through another oven structure for drying. Then it can enter the next frame or complete the printing directly.

[0047] The single-unit structure of the double-layer shaftless integrated printing press provided in this embodiment is compact, effectively saving the floor space of a single unit. When performing multi-color printing, the single units can be connected side by side with intervals, further saving the floor space of the printing press. A single unit can complete single-sided two-color printing or front and back printing, as well as double-layer printing and drying functions. The system layout is reasonable and does not interfere with each other, and can also meet the needs of multi-unit combined printing. While meeting the requirements of high-speed printing, the substrate 9 can be wound twice in the two drying oven structures to obtain secondary drying, ensuring a good drying effect.

[0048] It should also be noted that when there are two or more racks, two adjacent racks are connected by the upper connection 35 and the lower connection 36. Specifically, two adjacent anti-slip iron plates 16 of the machine feet are connected by the lower connection 36 of the machine body. The connection method includes, but is not limited to, fixed or detachable connection. Two adjacent upper machine bodies 1 are connected by the upper connection 35 of the machine body. The connection method includes, but is not limited to, fixed or detachable connection.

[0049] Furthermore, when the two printing units perform printing operations on one side of the printing substrate 9 in succession, the printing substrate 9 passes through the printing units from the same side of the two printing units under the action of the rotary guide installed on the frame. The rotary guide guides the printing substrate 9, which is removed from the oven structure corresponding to one drying cycle, to one side of the frame, which is the side where the printing substrate 9 initially enters the frame.

[0050] When the two printing units perform printing operations on both sides of the substrate 9 in succession, the substrate 9 passes through the printing units from different sides of the two printing units. That is to say, the substrate 9 removed from the oven structure corresponding to one drying cycle directly enters the other printing unit for printing.

[0051] The two drying ovens are a first drying oven and a second drying oven, which are symmetrically mounted on the frame. The first drying oven includes a single-color drying oven body 27 mounted on the frame. Multiple rollers 3 for guiding the printing substrate 9 are rotatably mounted on the inner side of the single-color drying oven body 27. The single-color drying oven body 27 also has through slots for the printing substrate 9 to enter and exit. The second drying oven includes a two-color drying oven body 7 mounted on the frame. Multiple rollers 3 for guiding the printing substrate 9 are rotatably mounted on the inner side of the two-color drying oven body 7. The two-color drying oven body 7 also has through slots for the printing substrate 9 to enter and exit.

[0052] A single-color drying box body 27 is hinged to a single-color drying box door 23 on the side away from the frame. A two-color drying box body 7 is hinged to a two-color drying box door 8 on the side away from the frame. The single-color drying box body 27 and the single-color drying box door 23 form a single-color drying system. The single-color drying system is fixed to the frame by drying box mounting feet 21. Specifically, a short support iron 5 is connected and installed on the upper body 1 through a support iron. The short support iron 5 is used for connecting and supporting the drying box mounting feet 21. The two-color drying box body 7 and the two-color drying box door 8 form a two-color drying system. The two-color drying system is fixed to the frame by another drying box mounting foot 21.

[0053] In one embodiment, based on the specific structures of the first and second drying ovens described above, the rotary guide includes a single-color drying oven lower roller mounting sheet metal 24 fixed to the single-color drying oven body 27 and a two-color drying oven lower roller mounting sheet metal 33 fixed to the two-color drying oven body 7. It also includes roller mounting square parts 12 symmetrically fixed to the frame. Specifically, a support iron length 14 is mounted on the frame, and the roller mounting square parts 12 and another drying oven mounting foot 21 are fixedly mounted on the support iron length 14. A roller 3 is rotatably mounted on the 12. Rollers 3 are also mounted on the lower roller mounting sheet metal 24 of the single-color drying box and the lower roller mounting sheet metal 33 of the two-color drying box. After the printing substrate 9 passes through the main body 27 of the single-color drying box, it passes through the roller mounted on the lower roller mounting sheet metal 24 of the single-color drying box and the roller 3 mounted on the roller mounting square part 12, and then passes through the roller 3 mounted on the lower roller mounting sheet metal 33 of the two-color drying box to enter the next printing unit for printing, so that the printing substrate 9 passes through the same side of the two printing units.

[0054] The single-color drying box body 27 and the two-color drying box body 7 are used to perform two drying processes on the printing substrate 9. It should be noted that the rollers on the frame used to guide the printing substrate 9 are all rollers 3, including the rollers 3 placed in the single-color drying box body 27 and the two-color drying box body 7, as well as all rollers 3 installed on the frame.

[0055] Both the single-color drying box body 27 and the two-color drying box body 7 are fixedly installed with upper roller mounting sheet metal 6. The upper roller mounting sheet metal 6 is arranged in an inverted triangular structure, and three rollers 3 are installed on the upper roller mounting sheet metal 6 to guide the printing substrate 9.

[0056] Furthermore, the two printing units are a single-color printing unit and a two-color printing unit, respectively. The single-color printing unit includes a single-color printing plate roller 18 and a single-color rubber roller assembly 19 rotatably mounted on the frame. A printing area for the substrate 9 to pass through is formed between the single-color printing plate roller 18 and the single-color rubber roller assembly 19. A first printing doctor blade assembly 13 is provided on the side end of the single-color printing plate roller 18, and a single-color ink tray lifting assembly 26 is also provided on the frame below the single-color printing plate roller 18. The two-color printing unit includes a two-color printing plate roller 10 and a two-color rubber roller assembly 22 rotatably mounted on the frame. A printing area for the substrate 9 to pass through is formed between the two-color printing plate roller 10 and the two-color rubber roller assembly 22. A second printing doctor blade assembly 20 is provided on the side end of the two-color printing plate roller 10, and a two-color ink tray lifting assembly 11 is also provided on the frame below the two-color printing plate roller 10.

[0057] The printing unit described above uses an existing printing structure, therefore, this embodiment will not elaborate on it further.

[0058] A swing arm assembly 25 is installed on both sides of the single-color roller assembly 19 on the frame, and the printing substrate 9 abuts against the two swing arm assemblies 25.

[0059] Two-color reverse printing color matching adjustment roller 31 and two-color front printing color matching adjustment roller 32 are respectively installed on both sides of the two-color roller assembly 22 on the frame. The printing substrate 9 passes through the two-color reverse printing color matching adjustment roller 31 for reverse printing, or the printing substrate 9 passes through the two-color front printing color matching adjustment roller 32 for front printing. Adjusting the rotation angle of the two-color reverse printing color matching adjustment roller 31 or the two-color front printing color matching adjustment roller 32 can adjust the front and back positions of the printed pattern.

[0060] In this invention, all rollers 3 are rotatably mounted on roller mounting shaft 2 to achieve effective support for rollers 3.

[0061] Please see Figure 1 , Figure 1This is a schematic diagram of a printing substrate 9 being printed on both sides. After the substrate 9 receives suitable tension through the tension adjustment component 34, it passes over the printing plate roller 18 via the upper roller 3 of the swing arm component 25 for single-color printing. The printing plate roller 18 has end caps at both ends controlled by cylinders 40 and handwheel screws 39 mounted on the frame, allowing for clamping and positioning. Rotating the handwheel screws 39 adjusts the left and right position of the printed pattern on the printing plate roller 18. The ink tray lifting component 26 can be adjusted to raise the ink tray containing dye to a certain height. The printing plate roller 18 is partially immersed in dye. The process is controlled by an electric device (including but not limited to...). Driven by a servo motor, the single-color printing plate roller 18 rotates counterclockwise. The first printing doctor blade assembly 13 is adjusted to contact the single-color printing plate roller 18 and scrape off the excess dye in the blank part of the single-color printing plate roller 18. At this time, the dye on the surface of the single-color printing plate roller 18 is only left in the patterned cells. The single-color rubber roller assembly 19 is pushed down by the pneumatic components and presses the printing substrate 9 onto the surface of the single-color printing plate roller 18. Under a certain pressure, the dye is transferred to the surface of the printing substrate 9. The printing substrate 9 is pulled into the single-color drying system by other rollers 3 for drying, which cures the dye on the surface of the printing substrate 9 and obtains a stable printing pattern.

[0062] The substrate 9, pulled by other rollers 3, enters the two-color reverse printing color adjustment roller 31, and then passes between the two-color rubber roller assembly 22 and the two-color printing plate roller 10. Each end of the two-color printing plate roller 10 is controlled by another cylinder 40 and another screw with a handwheel 39 to extend and retract a certain length of end cap for clamping and positioning. Rotating the other screw with a handwheel 39 adjusts the left and right position of the printed pattern on the two-color printing plate roller 10. Adjusting the two-color ink tray lifting assembly 11 raises the ink tray containing dye to a certain height, partially immersing the two-color printing plate roller 10 in the dye. Driven by an electric device (including but not limited to a servo motor), the two-color printing plate roller 10 rotates clockwise. Adjusting the second printing doctor blade assembly 20 makes it aligned with the two-color printing plate roller 10. The excess dye on the blank areas of the two-color printing roller 10 is scraped off, leaving only the patterned cells on the surface of the roller 10. The two-color roller assembly 22 is pushed down by pneumatic components and presses the substrate 9 onto the surface of the two-color printing roller 10. Under certain pressure, the dye is transferred to the surface of the substrate 9. The rotation angle of the swing roller 31 can be adjusted to change the front and back position of the printed pattern on the two-color printing roller 10. The substrate 9 is dried in the two-color drying system under the traction of other rollers 3, which cures the dye on the surface of the substrate 9 and obtains a stable printed pattern. The substrate 9 is then pulled out by other rollers 3 to complete the printing of both the front and back sides of the substrate 9.

[0063] Please see Figure 2 , Figure 2 This diagram illustrates the process of two front-side printing substrates being wound together. After the substrate 9 receives suitable tension via the tension adjustment assembly 34, it passes over the single-color printing roller 18 via the upper roller 3 of the swing arm assembly 25 for single-color printing. The two ends of the single-color printing roller 18 are controlled by cylinders 40 mounted on the frame and screws with handwheels 39 to extend and retract a certain length of end caps for clamping and positioning. Rotating the screws with handwheels 39 adjusts the left and right position of the printed pattern on the single-color printing roller 18. The single-color ink tray lifting assembly 26 can be adjusted to raise the ink tray containing dye to a certain height. The single-color printing roller 18 is partially immersed in dye. The process is controlled by an electric device (including but not limited to a servo motor). Driven by the motor, the single-color printing plate roller 18 rotates counterclockwise. The first printing doctor blade assembly 13 is adjusted to contact the single-color printing plate roller 18 and scrape off the excess dye in the blank part of the single-color printing plate roller 18. At this time, the dye on the surface of the single-color printing plate roller 18 is only left in the patterned cells. The single-color rubber roller assembly 19 is pushed down by the pneumatic components and presses the printing substrate 9 onto the surface of the single-color printing plate roller 18. Under a certain pressure, the dye is transferred to the surface of the printing substrate 9. The printing substrate 9 is pulled into the single-color drying system by other rollers 3 for drying, which cures the dye on the surface of the printing substrate 9 and obtains a stable printing pattern.

[0064] The substrate 9 passes through roller 3 mounted on the lower roller mounting sheet metal 24 of the single-color drying oven and two symmetrical rollers 3 mounted on the roller mounting square part 12, then through roller 3 mounted on the lower roller mounting sheet metal 33 of the two-color drying oven, and enters the two-color front printing color matching adjustment roller 32. It then passes between the two-color rubber roller assembly 22 and the two-color printing plate roller 10. Each end of the two-color printing plate roller 10 is controlled by another cylinder 40 and another screw with a handwheel 39 to extend and retract a certain length of end cap for clamping and positioning. Rotating the other screw with a handwheel 39 adjusts the left and right position of the printed pattern on the two-color printing plate roller 10. Adjusting the two-color ink tray lifting assembly 11 raises the ink tray containing dye to a certain height, partially immersing the two-color printing plate roller 10 in dye. Driven by an electric device (including but not limited to a servo motor), the two-color printing plate roller 10... The second printing squeegee assembly 20 is adjusted to rotate counterclockwise, making it contact the two-color printing roller 10 and scraping off excess dye from the blank areas of the two-color printing roller 10. At this time, the dye on the surface of the two-color printing roller 10 only remains in the patterned cells. The two-color rubber roller assembly 22 is pushed down by the pneumatic components and presses the substrate 9 onto the surface of the two-color printing roller 10. Under a certain pressure, the dye is transferred to the surface of the substrate 9. The rotation angle of the swing roller 32 can be adjusted to adjust the front and back positions of the printed pattern on the two-color printing roller 10. The substrate 9 is pulled into the two-color drying system by the other rollers 3 for drying, which cures the dye on the surface of the substrate 9 and obtains a stable printed pattern. The substrate 9 is pulled out by the other rollers 3 to complete the printing on both sides of the substrate 9.

[0065] Please see Figure 3 , Figure 3 This is a schematic diagram showing the printing process of a substrate with three front sides and one back side. In this case, the frame is set up with two sets; the first set is used to perform the following... Figure 2 In the double-sided printing described above, the original tension adjustment component 34 on the second set of frames is replaced with a three-color printing registration adjustment roller 38. After the substrate 9 completes double-sided printing, it enters the second set of frames via the three-color printing registration adjustment roller 38. The rotation angle of the three-color printing registration adjustment roller 38 can adjust the front and rear positions of the printed pattern on the single-color printing roller 18 of the second set of frames. The winding method of the substrate 9 on the second set of frames is the same as... Figure 1 The same winding method is used for the printing substrate 9, which ultimately achieves printing on three front sides and one back side of the printing substrate 9.

[0066] Please see Figure 4 , Figure 4 This is a schematic diagram showing the printing process of two front and two back printing substrates. In this case, the machine frame is set up with two sets; the first set is used to perform the following... Figure 2In the two-sided printing described above, the original traction tension adjustment component 34 on the second set of frames is replaced with a three-color printing color adjustment swing roller 38. At the same time, a three-color reverse printing roller support 37 is set on the second set of frames, and a roller 3 is installed on the three-color reverse printing roller support 37. The printing substrate 9 enters the one-color printing part on the second set of frames under the action of the roller 3 on the three-color reverse printing roller support 37. After the one-color printing, the printing substrate 9 passes through the two-color drying box body 7, the two-color printing part and the one-color drying box body 27 on the second set of frames in sequence. Then the printing substrate 9 is pulled out by the traction of other rollers 3, completing the printing of the two front and two back sides of the printing substrate 9.

[0067] It should be noted that, please refer to [link / reference needed]. Figure 4 The direction in which the printing substrate 9 enters the single-color printing and two-color printing parts on the first set of frames is direction A, and the direction in which the printing substrate 9 enters the single-color printing and two-color printing parts on the second set of frames is direction B. Direction A and direction B are opposite.

[0068] Please see Figure 5 , Figure 5 This is a schematic diagram showing the four-sided printing substrate being wound around the printing plate. At this point, the frame is set up with two sets; the first set is used to perform actions such as... Figure 2 In the double-sided printing described above, the original tension adjustment component 34 on the second set of frames is replaced with a three-color printing registration adjustment roller 38. After the substrate 9 completes the double-sided printing, it enters the second set of frames via the three-color printing registration adjustment roller 38. The winding method of the substrate 9 on the second set of frames is the same as... Figure 2 The same winding method is used for the printing substrate 9, which ultimately achieves printing on all four sides of the printing substrate 9.

[0069] It should be noted that, including but not limited to, the racks are set to two groups, and multiple groups of racks can be set up and used according to actual needs.

[0070] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0071] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A double-layer shaftless integrated printing press, characterized in that, include: At least one frame on which two printing units are arranged vertically in a spatial distribution, the two printing units sequentially printing on one or both sides of the substrate (9); an oven structure installed on the frame, the oven structure being used to dry the substrate (9) after the substrate (9) has been printed once and twice.

2. The double-layer shaftless integrated printing machine according to claim 1, characterized in that, The frame is also provided with a rotary guide; when the two printing units perform printing operations on one side of the substrate (9) in succession, the substrate (9) passes through the printing unit from the same side of the two printing units under the action of the rotary guide; when the two printing units perform printing operations on both sides of the substrate (9) in succession, the substrate (9) passes through the printing unit from different sides of the two printing units.

3. The double-layer shaftless integrated printing machine according to claim 1, characterized in that, The oven structure includes a first oven and a second oven, which are symmetrically mounted on the frame.

4. The double-layer shaftless integrated printing machine according to claim 3, characterized in that, The first oven includes: a single-color drying oven body (27) mounted on the frame, wherein a plurality of rollers (3) for guiding the printing substrate (9) are rotatably mounted on the inner side of the single-color drying oven body (27), and a through groove for the printing substrate (9) to enter and exit is also formed on the single-color drying oven body (27); the second oven includes: a two-color drying oven body (7) mounted on the frame, wherein a plurality of rollers (3) for guiding the printing substrate (9) are rotatably mounted on the inner side of the two-color drying oven body (7), and a through groove for the printing substrate (9) to enter and exit is also formed on the two-color drying oven body (7).

5. The double-layer shaftless integrated printing machine according to claim 2, characterized in that, The two printing units are a single-color printing unit and a two-color printing unit, respectively. The single-color printing unit includes a single-color printing plate roller (18) and a single-color rubber roller assembly (19) rotatably mounted on the frame. A printing area for the substrate (9) to pass through is formed between the single-color printing plate roller (18) and the single-color rubber roller assembly (19). A first printing doctor blade assembly (13) is provided on the side end of the single-color printing plate roller (18), and a [missing information - likely a device or component] is also provided on the frame below the single-color printing plate roller (18). The two-color printing plate includes a two-color printing plate roller (10) and a two-color rubber roller assembly (22) rotatably mounted on the frame. A printing area for the substrate (9) to pass through is formed between the two-color printing plate roller (10) and the two-color rubber roller assembly (22). A second printing doctor blade assembly (20) is provided on the side end of the two-color printing plate roller (10), and a two-color ink plate lifting assembly (11) is also provided on the frame below the two-color printing plate roller (10).

6. The double-layer shaftless integrated printing machine according to claim 1, characterized in that, A tension adjustment assembly (34) is installed on one side of the frame, and the printing substrate (9) passes through the tension adjustment assembly (34) before printing in each printing unit.

7. The double-layer shaftless integrated printing machine according to claim 5, characterized in that, A swing arm assembly (25) is installed on both sides of the single-color roller assembly (19) on the frame, and the printing substrate (9) abuts against the two swing arm assemblies (25).

8. The double-layer shaftless integrated printing machine according to claim 5, characterized in that, The frame is equipped with a two-color reverse printing color matching adjustment roller (31) and a two-color front printing color matching adjustment roller (32) on both sides of the two-color roller assembly (22); the printing substrate (9) passes through the two-color reverse printing color matching adjustment roller (31) for reverse printing, or the printing substrate (9) passes through the two-color front printing color matching adjustment roller (32) for front printing.

9. The double-layer shaftless integrated printing machine according to claim 1, characterized in that, The frame includes: a lower frame (15), on which a foot anti-slip iron plate (16) is connected via a lower frame connecting rectangular tube (17); and an upper frame (1), which is connected to the lower frame (15) via an upper and lower frame connecting square piece (30).

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