Double-layer paste rotary press

Abstract

The invention relates to the technical field of printing machines, and provides a double-layer-pasting rotary printing machine which comprises unwinding equipment, printing equipment and winding equipment, a mounting rack is arranged between the printing equipment and the winding equipment, rotating wheel mechanisms are arranged in the unwinding equipment, the printing equipment, the winding equipment and the mounting rack, and the double-layer-pasting rotary printing machine further comprises a lifting support and an unwinding frame. The number of the lifting supports is two, a transverse distance adjusting assembly is arranged between the top of the mounting rack and the two lifting supports, a movable frame is arranged at the bottoms of the lifting supports, a plurality of unwinding frames are transversely and slidably arranged in the movable frame, and a magnetic fixing assembly is arranged between the movable frame and the unwinding frames. And corresponding moving assemblies corresponding to the unwinding frames are arranged in the moving frame. By means of the technical scheme, the problem that in the prior art, after a transfer printing machine completes printing work on one section of area of the double-layer sticker, marking work cannot be conducted on edge zones on the two sides of different printing areas of the double-layer sticker is solved.

Description

Technical Field

[0001] The invention relates to the technical field of printing machines, in particular to a double-layer rotary printing machine. Background Art

[0002] A rotary printing press is a common continuous printing device in the prior art, and is a prior art device mainly used for printing on roll paper. The rotary printing press mainly includes two parts, a rotary machine and a printing press. The rotary machine is used to drive the roll paper to move a long distance, and after the roll paper passes through the printing press for multiple printing operations, exquisite and complex patterns can be printed on the roll paper, which is used to achieve large-scale printing operations. The rotary printing press can not only be used for printing on roll paper, but also for printing on other flat materials. For example, a double-layer sticker can be printed with patterns and trademarks on the double-layer sticker by a rotary printing press, so that the double-layer sticker can be used for commercial promotion. However, the general volume of the double-layer sticker is relatively narrow. Even if a wider double-layer sticker material is used at the beginning, it is necessary to cut the double-layer sticker after the printing operation so that the double-layer sticker is cut into narrower long-distance double-layer stickers.

[0003] With the continuous extension of the rotary printing machine technology in the prior art, different patterns can be printed on different areas of the double-layer sticker surface during the long-distance conveying of the double-layer sticker by the rotary machine. Therefore, when the double-layer sticker is subsequently cut, the double-layer sticker is not cut at equal distances, but is cut according to different printing areas on the double-layer sticker. However, this requires adjustment of the cutting area of ​​the subsequent cutting equipment. Because the patterns and background colors of different printing areas on the double-layer sticker are sometimes not particularly clear, the user is required to perform extremely precise detection according to the area of ​​the double-layer sticker to prevent the problem of size differences in the cut double-layer sticker area. At the beginning of the cutting operation, the cutting distance of the cutting equipment always needs to be adjusted multiple times to ensure the accuracy of the size after cutting. During the printing process of the double-layer sticker by the rotary printing machine in the prior art, after completing the printing operation of a section of the double-layer sticker, there is a lack of marking operation on the edge areas on both sides of the different printing areas of the double-layer sticker, which affects the subsequent adjustment operation of other equipment when processing the double-layer sticker. Summary of the invention

[0004] The present invention provides a double-layer sticker rotary printing machine, which solves the problem that after the transfer printing machine in the related art completes the printing operation on a section of the double-layer sticker, it lacks the marking operation on the edge areas on both sides of different printing areas of the double-layer sticker.

[0005] The technical solution of the present invention is as follows: a double-layer rotary printing machine, comprising an unwinding device, a printing device and a rewinding device, a mounting frame is arranged between the printing device and the rewinding device, and a rotating wheel mechanism is arranged in the unwinding device, the printing device, the rewinding device and the mounting frame, and further comprising: Lifting supports, the number of which is set to two, a lateral distance adjustment component is provided between the top of the mounting frame and the two lifting supports, and a movable frame is provided at the bottom of the lifting supports; An unwinding frame, wherein a plurality of the unwinding frames are arranged in a transversely sliding manner in the movable frame, a magnetic fixing component is arranged between the movable frame and the plurality of the unwinding frames, and corresponding movable components are arranged in the movable frame corresponding to the plurality of the unwinding frames; The marking tape roll is provided with a fixed unwinding component in the unwinding frame for unwinding the marking tape roll.

[0006] In order to adjust the distance between the two lifting supports, further, the lateral distance adjustment assembly includes a sliding frame, a bidirectional screw and a first drive motor. The sliding frame is connected and arranged on the top of the mounting frame. The lifting support is slidably connected in the sliding frame. The bidirectional screw is rotatably connected in the sliding frame. The lifting support is threadedly connected to one side of the bidirectional screw. The top of the mounting frame is provided with a first drive motor, and the output end of the first drive motor is fixedly connected to the bidirectional screw.

[0007] In order to adjust the height of the movable frame, further, it further comprises a first electric cylinder, two of the first electric cylinders are arranged on the lifting support, and the movable frame is fixedly connected between the output ends of the two first electric cylinders.

[0008] In order to keep the unwinding frame stable in the mobile frame, further, the magnetic fixing assembly includes a fixed trough body and a sliding seat, the fixed trough body is fixedly connected in the mobile frame, a plurality of ferrous plates are fixedly connected to the inner top wall of the fixed trough body, the sliding seat is fixedly connected to the top of the unwinding frame, the sliding seat is slidably connected in the fixed trough body, an electromagnet is arranged on the sliding seat, and the electromagnet is magnetically connected to the ferrous plate.

[0009] In order to adjust the position of the unwinding frame in the moving frame, on the basis of the present solution, the corresponding moving component includes a rotating frame, an engaging plate and an engaging seat, the rotating frame is fixedly connected in the moving frame, a mounting seat is slidably connected in the rotating frame, a screw transmission assembly is arranged between the mounting seat and the rotating frame, the tops of the multiple unwinding frames are fixedly connected with the engaging plate, a second electric cylinder is arranged in the mounting seat, and the engaging seat is arranged on the output end of the second electric cylinder.

[0010] In order to unwind the marking tape roll, on the basis of the present scheme, further, the fixed unwinding assembly includes a rotating ring sleeve, a movable screw and a rotating assembly, the rotating ring sleeve is fixedly connected on both sides of the unwinding frame, a threaded seat is rotatably connected in the rotating ring sleeve, the movable screw is threadedly connected in the threaded seat, the adjacent ends of the two movable screws are fixedly connected to a fixed cylinder, a fixed shaft is arranged in the marking tape roll, the fixed shaft is arranged between the two fixed cylinders, and the rotating assembly is arranged between one of the threaded seats and the unwinding frame.

[0011] In order to extrude the marking tape roll during the unwinding process, on the basis of the above-mentioned scheme, it also includes a rotating part and an extrusion wheel. The rotating part is arranged in each unwinding frame, an elastic part is arranged between the rotating part and the unwinding frame, and the extrusion wheel is rotatably connected in the rotating part.

[0012] In order to fix the end of the marking tape, on the basis of the above-mentioned scheme, it further includes a third electric cylinder and an adhesive seat. The third electric cylinder is arranged in the unwinding frame, and the third electric cylinder is arranged between the rotating part and the marking tape roll. The adhesive seat is arranged on the output end of the third electric cylinder.

[0013] In order to provide a prompt for different printing areas on the double-layer sticker, based on the above solution, further, a marking area is provided in the central area of ​​the marking tape roll.

[0014] In order to make the extrusion wheel drive the marking tape to fit tightly with the double layer, on the basis of the above-mentioned scheme, further, the elastic part includes a sliding cylinder, the sliding cylinder is fixedly connected in the unwinding frame, a sliding rod is slidably connected in the sliding cylinder, the sliding rod is fixedly connected to the rotating part, and a spring damper is arranged between the sliding rod and the inner wall of the sliding cylinder.

[0015] The working principle and beneficial effects of the present invention are: In the present invention, after the double-layer sticker completes the printing operation of a section, in order to prompt the double-layer sticker in this section during subsequent cutting, the positions of the two lifting supports can be adjusted, and then the positions of the multiple unwinding frames can be adjusted through the corresponding moving components, and the unwinding frames can be kept fixed in the moving frames through the magnetic fixing components, so that the unwinding frames are moved to the upper side of the cutting area of ​​the double-layer sticker, and then the moving frame is lowered to make one end of the marking tape roll contact with the double-layer sticker, and then the end of the marking tape roll moves with the double-layer sticker, and the marking tape roll is unwound by fixing the unwinding component, so that the marking tape is attached to the double-layer sticker and moves with the double-layer sticker, and the marking tape can prompt the cutting area of ​​the double-layer sticker, which is convenient for the subsequent user to adjust the cutting spacing of the cutting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of a partial cross-section of the structure of the mounting frame, the lifting support, the moving frame and the sliding frame in the present invention; Figure 3 It is a schematic diagram of a partial cross-section of the structure of the lifting support, the moving frame, the unwinding frame, the marking tape roll and the sliding frame in the present invention; Figure 4 It is a schematic diagram of a partial cross-section of the structure of the cooperation among the movable frame, the fixed tank body, the unwinding frame and the rotating frame in the present invention; Figure 5 It is a schematic diagram of a partial cross-section of the structure of the unwinding frame, the bonding seat, the sliding seat and the extrusion wheel in the present invention; Figure 6 It is a schematic diagram of a partial cross-section of the structure of the unwinding frame, the threaded seat, the fixed shaft and the movable screw in the present invention; Figure 7 It is a partial cross-sectional structural diagram of the cooperation among the rotating frame, the second electric cylinder and the engaging seat in the present invention; Figure 8 It is a schematic diagram of the structure of the marking tape roll and the marking area in the present invention.

[0018] In the figure: 1. Unwinding device; 2. Printing device; 3. Rewinding device; 4. Mounting frame; 5. Rotating wheel mechanism; 6. Lifting support; 7. Moving frame; 8. Unwinding frame; 9. Marking tape roll; 10. Sliding frame; 11. Bidirectional screw; 12. First drive motor; 13. First electric cylinder; 14. Fixed trough; 15. Iron plate; 16. Sliding seat; 17. Electromagnet; 18. Rotating frame; 19. Engaging plate; 20. Engaging seat; 21. Second electric cylinder; 22. Rotating ring sleeve; 23. Threaded seat; 24. Moving screw; 25. Fixed cylinder; 26. Fixed shaft; 27. Rotating member; 28. Extrusion wheel; 29. ​​Third electric cylinder; 30. Adhesive seat; 31. Marking area; 32. Sliding cylinder; 33. Sliding rod; 34. Spring damper; 35. Transmission screw; 36. Second drive motor; 37. Third drive motor; 38. Transmission gear. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figures 1 to 8 As shown, this embodiment proposes a double-layer sticker rotary printing machine, including an unwinding device 1, a printing device 2 and a rewinding device 3, a mounting frame 4 is arranged between the printing device 2 and the rewinding device 3, and a rotating wheel mechanism 5 is arranged in the unwinding device 1, the printing device 2, the rewinding device 3 and the mounting frame 4. The unwinding device 1, the printing device 2, the rewinding device 3 and the rotating wheel structure mentioned in this application are all prior art devices commonly used in rotary printing machines in the prior art. The unwinding device 1 is a prior art device for unwinding the double-layer sticker after rewinding, the printing device 2 is a device for printing the double-layer sticker during movement, the rotating wheel structure is a device for driving the double-layer sticker for long-distance transportation, and the rewinding device 3 is a device for rewinding the double-layer sticker after printing, all of which are prior art devices well known to technical personnel in this field.

[0021] It also includes a lifting support 6, the number of which is set to two, a lateral distance adjustment component is arranged between the top of the mounting frame 4 and the two lifting supports 6, the lateral distance adjustment component includes a sliding frame 10, a bidirectional screw 11 and a first drive motor 12, the sliding frame 10 is connected and arranged on the top of the mounting frame 4, the lifting support 6 is slidably connected in the sliding frame 10, the bidirectional screw 11 is rotatably connected in the sliding frame 10, the lifting support 6 is threadedly connected to one side of the bidirectional screw 11, a first drive motor 12 is arranged on the top of the mounting frame 4, the output end of the first drive motor 12 is fixedly connected to the bidirectional screw 11, when there are more cutting areas on the double-layer sticker, the first drive motor 12 is started to drive the bidirectional screw 11 to rotate, and the spacing between the two lifting supports 6 and the moving frame 7 is adjusted, so that the moving frame 7 can be moved in the mounting frame 4, so that the marking tape roll 9 can be moved to the corresponding double-layer sticker cutting area; A moving frame 7 is provided at the bottom of the lifting support 6, and also includes a first electric cylinder 13. Two first electric cylinders 13 are provided on the lifting support 6. The moving frame 7 is fixedly connected between the output ends of the two first electric cylinders 13. Starting the first electric cylinder 13 can drive the moving frame 7 to move longitudinally, so that the marking tape rolled on the marking tape roll 9 contacts the double-layer sticker surface.

[0022] A plurality of unwinding frames 8 are arranged in a transversely sliding manner in the mobile frame 7, a magnetic fixing assembly is arranged between the mobile frame 7 and the plurality of unwinding frames 8, the magnetic fixing assembly comprises a fixed trough 14 and a sliding seat 16, the fixed trough 14 is fixedly connected in the mobile frame 7, a plurality of ferrous plates 15 are fixedly connected on the inner top wall of the fixed trough 14, a sliding seat 16 is fixedly connected to the top of the unwinding frame 8, the sliding seat 16 is slidably connected in the fixed trough 14, an electromagnet 17 is arranged on the sliding seat 16, the electromagnet 17 is magnetically connected to the ferrous plates 15, after adjusting the positions of the unwinding frame 8 and the sliding seat 16, the electromagnet 17 is made to correspond to one of the ferrous plates 15, and then the electromagnet 17 is powered to generate magnetism, so that the electromagnet 17 is magnetically connected to one of the ferrous plates 15, so that the unwinding frame 8 can be kept fixed in the fixed trough 14; Corresponding moving components are provided in the mobile frame 7 corresponding to the multiple unwinding frames 8, and the corresponding moving components include a rotating frame 18, an engaging plate 19 and an engaging seat 20. The rotating frame 18 is fixedly connected in the mobile frame 7, and a mounting seat is slidably connected in the rotating frame 18. A screw transmission component is provided between the mounting seat and the rotating frame 18. The screw transmission component includes a transmission screw 35, and the transmission screw 35 is rotatably connected in the rotating frame 18. The mounting seat is threadedly connected to the transmission screw 35. A second drive motor 36 is provided on the mobile frame 7, and the output end of the second drive motor 36 is fixedly connected to the transmission screw 35. The tops of the multiple unwinding frames 8 are fixedly connected with the engaging plate 19, and a second electric cylinder 21 is provided in the mounting seat. An engaging seat 20 is provided on the output end of the second electric cylinder 21, and the engaging seat 20 is slidably connected to the mounting seat through a sliding member. When the unwinding frame 8 needs to be moved, the second drive motor 36 is started to drive the transmission screw 35 to rotate, so that the transmission screw 35 drives the mounting seat, the second electric cylinder 21 and the engaging seat 20 to move horizontally, so that the engaging seat 20 moves to the upper side of the corresponding engaging plate 19, and then the second electric cylinder 21 is started to drive the engaging seat 20 and the sliding member to move longitudinally, so that the engaging seat 20 moves into the corresponding engaging plate 19, and then the mounting seat and the engaging seat 20 are continued to move horizontally through the transmission screw 35, so as to adjust the lateral position of the unwinding frame 8, so that the marking tape roll 9 corresponds to the cutting area on the double-layer paste.

[0023] A fixed unwinding assembly for unwinding the marking tape roll 9 is arranged in the unwinding frame 8, and the fixed unwinding assembly includes a rotating ring sleeve 22, a movable screw 24 and a rotating assembly. The rotating ring sleeve 22 is fixedly connected to both sides of the unwinding frame 8, and a threaded seat 23 is rotatably connected in the rotating ring sleeve 22. The movable screw 24 is threadedly connected in the threaded seat 23, and the adjacent ends of the two movable screws 24 are fixedly connected to a fixed cylinder 25. A fixed shaft 26 is arranged in the marking tape roll 9, and the fixed shaft 26 is arranged between the two fixed cylinders 25. A rotating assembly is arranged between one of the threaded seats 23 and the unwinding frame 8, and the rotating assembly includes a third drive motor 37. The third drive motor 37 is arranged on the unwinding frame 8, and the output end of the third drive motor 37 A transmission gear 38 is provided on the threaded seat 23 on one side, and the two transmission gears 38 are meshed. When the identification tape roll 9 needs to be fixed and unwound, the fixed shaft 26 is first inserted into the center of the identification tape roll 9, and then the fixed shaft 26 is placed between the two fixed cylinders 25, and the moving screw 24 is rotated to make the moving screw 24 drive the fixed cylinder 25 to move, so that the fixed shaft 26 is fixed between the two fixed cylinders 25, and then after the identification tape on one side of the identification tape roll 9 contacts the double-layer sticker, the third drive motor 37 is started, and the threaded seat 23 on one side is driven to rotate through the two transmission gears 38, so that the moving screw 24, the fixed cylinder 25, the fixed shaft 26 and the identification tape roll 9 rotate together, and the identification tape roll 9 is unwound; It also includes a rotating member 27 and an extrusion wheel 28. Each unwinding frame 8 is provided with a rotating member 27. An elastic member is provided between the rotating member 27 and the unwinding frame 8. The elastic member includes a sliding cylinder 32. The sliding cylinder 32 is fixedly connected to the unwinding frame 8. A sliding rod 33 is slidably connected to the sliding cylinder 32. The sliding rod 33 is fixedly connected to the rotating member 27. A spring damper 34 is provided between the sliding rod 33 and the inner wall of the sliding cylinder 32. The extrusion wheel 28 is rotatably connected to the rotating member 27. In order to make the marking tape and the double-layer sticker fit tightly, the sliding rod 33, the rotating member 27 and the extrusion wheel 28 are pushed down by the elastic force of the spring damper 34, so that the extrusion wheel 28 squeezes the marking tape to contact the surface of the double-layer sticker; It also includes a third electric cylinder 29 and an adhesive seat 30. The third electric cylinder 29 is arranged in the unwinding frame 8. The third electric cylinder 29 is arranged between the rotating part 27 and the marking tape roll 9. The adhesive seat 30 is arranged on the output end of the third electric cylinder 29. In order to automatically make the marking tape contact with the surface of the double-layer sticker, some mucus is arranged at the bottom end of the adhesive seat 30, so that the end of the marking tape can be adhered to the bottom of the adhesive seat 30, but the viscosity of the bottom end of the adhesive seat 30 is not strong. After the third electric cylinder 29 drives the adhesive seat 30 to descend, the end of the marking tape can contact the marking tape. After the marking tape contacts the double-layer sticker, the adhesive seat 30 is driven to rise by the third electric cylinder 29 to separate the adhesive seat 30 from the marking tape.

[0024] A marking area 31 is provided in the central area of ​​the marking tape roll 9. The marking area 31 is used to remind the user of the subsequent cutting area of ​​the double-layer sticker. The marking tape can be adhered to multiple areas on a roll of double-layer stickers to achieve cutting of the double-layer stickers and to judge the cutting accuracy of the double-layer stickers.

[0025] The working principle of the double-layer rotary printing machine: After the double-layer sticker in one roll is about to be printed, the second drive motor 36 is started to drive the transmission screw 35 to rotate, so that the transmission screw 35 drives the mounting seat, the second electric cylinder 21 and the meshing seat 20 to move horizontally, so that the meshing seat 20 moves to the upper side of the corresponding meshing plate 19, and then the second electric cylinder 21 is started to drive the meshing seat 20 and the sliding member to move longitudinally, so that the meshing seat 20 moves into the corresponding meshing plate 19, and then the mounting seat and the meshing seat 20 are continued to move horizontally through the transmission screw 35, so as to adjust the horizontal position of the unwinding frame 8, so that the marking tape roll 9 corresponds to the cutting area on the double-layer sticker, and then the electromagnetic device 17 is powered to keep the sliding seat 16 and the unwinding frame 8 stable in the fixed groove body 14; Then start the first electric cylinder 13 to drive the moving frame 7 to descend, so that the marking tape roll 9 moves to an area close to the surface of the double-layer sticker. After the third electric cylinder 29 drives the bonding seat 30 to descend, the end of the marking tape can contact the marking tape, and then the marking tape moves with the double-layer sticker, and the marking tape is smoothly bonded to the surface of the double-layer tape through the extrusion wheel 28. Start the third driving motor 37, and drive the threaded seat 23 on one side to rotate through the two transmission gears 38, so that the moving screw 24, the fixed cylinder 25, the fixed shaft 26 and the marking tape roll 9 rotate together, and the marking tape roll 9 is unwound. After the printing of the double-layer sticker is completed and the end of the double-layer sticker is in contact with the marking tape, the user can cut the marking tape and bond the end of the marking tape to the bonding seat 30.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-layer rotary printing machine, comprising an unwinding device (1), a printing device (2) and a rewinding device (3), wherein a mounting frame (4) is arranged between the printing device (2) and the rewinding device (3), and a rotating wheel mechanism (5) is arranged inside the unwinding device (1), the printing device (2), the rewinding device (3) and the mounting frame (4), wherein: Also includes: A lifting support (6), wherein the number of the lifting supports (6) is set to two, a lateral distance adjustment component is provided between the top of the mounting frame (4) and the two lifting supports (6), and a movable frame (7) is provided at the bottom of the lifting support (6); An unwinding frame (8), wherein a plurality of the unwinding frames (8) are arranged in a transversely sliding manner in the movable frame (7), a magnetic fixing component is arranged between the movable frame (7) and the plurality of the unwinding frames (8), and corresponding movable components are arranged in the movable frame (7) corresponding to the plurality of the unwinding frames (8); A marking tape roll (9), wherein a fixed unwinding component for unwinding the marking tape roll (9) is arranged in the unwinding frame (8).

2. A double-layer rotary printing machine according to claim 1, characterized in that: The lateral distance adjustment assembly comprises: A sliding frame (10), the sliding frame (10) being arranged in communication with the top of the mounting frame (4), and the lifting support (6) being slidably connected in the sliding frame (10); A bidirectional screw (11), the bidirectional screw (11) being rotatably connected inside the sliding frame (10), and the lifting support (6) being threadedly connected to one side of the bidirectional screw (11); A first drive motor (12), wherein the top of the mounting frame (4) is provided with the first drive motor (12), and an output end of the first drive motor (12) is fixedly connected to the bidirectional screw rod (11).

3. A double-layer rotary printing machine according to claim 2, characterized in that: Also includes: A first electric cylinder (13), two of the first electric cylinders (13) are arranged on the lifting support (6), and the moving frame (7) is fixedly connected between the output ends of the two first electric cylinders (13).

4. A double-layer rotary printing machine according to claim 3, characterized in that: The magnetic fixing assembly comprises: A fixed trough body (14), the fixed trough body (14) being fixedly connected in the movable frame (7), and a plurality of iron plates (15) being fixedly connected to an inner top wall of the fixed trough body (14); A sliding seat (16), the top of the unwinding frame (8) is fixedly connected to the sliding seat (16), the sliding seat (16) is slidably connected in the fixed groove body (14), an electromagnetic device (17) is provided on the sliding seat (16), and the electromagnetic device (17) is magnetically connected to the ferrous plate (15).

5. A double-layer rotary printing machine according to claim 4, characterized in that: The corresponding mobile components include: A rotating frame (18), the rotating frame (18) being fixedly connected in the moving frame (7), a mounting seat being slidably connected in the rotating frame (18), and a screw transmission assembly being provided between the mounting seat and the rotating frame (18); An engaging plate (19), the tops of the plurality of unwinding frames (8) being fixedly connected to the engaging plate (19); An engagement seat (20), wherein a second electric cylinder (21) is arranged in the mounting seat, and the engagement seat (20) is arranged on the output end of the second electric cylinder (21).

6. A double-layer rotary printing machine according to claim 5, characterized in that: The fixed unwinding assembly comprises: A rotating ring sleeve (22), both sides of the unwinding frame (8) are fixedly connected to the rotating ring sleeve (22), and a threaded seat (23) is rotatably connected inside the rotating ring sleeve (22); A movable screw rod (24), the threaded seat (23) being internally threadedly connected to the movable screw rod (24), the adjacent ends of the two movable screw rods (24) being fixedly connected to a fixed cylinder (25), a fixed shaft (26) being arranged in the marking tape roll (9), and the fixed shaft (26) being arranged between the two fixed cylinders (25); A rotating assembly, wherein the rotating assembly is arranged between one of the threaded seats (23) and the unwinding frame (8).

7. A double-layer rotary printing machine according to claim 6, characterized in that: Also includes: A rotating member (27), wherein each of the unwinding frames (8) is provided with the rotating member (27), and an elastic member is provided between the rotating member (27) and the unwinding frame (8); An extrusion wheel (28) is rotatably connected inside the rotating member (27).

8. A double-layer rotary printing machine according to claim 7, characterized in that: Also includes: a third electric cylinder (29), wherein the unwinding frame (8) is provided with the third electric cylinder (29), and the third electric cylinder (29) is arranged between the rotating member (27) and the marking tape roll (9); An adhesive seat (30) is provided on the output end of the third electric cylinder (29).

9. A double-layer rotary printing machine according to claim 8, characterized in that: A marking area (31) is provided in the central area of ​​the marking tape roll (9).

10. A double-layer rotary printing machine according to claim 9, characterized in that: The elastic member comprises: A sliding cylinder (32), the sliding cylinder (32) is fixedly connected in the unwinding frame (8), a sliding rod (33) is slidably connected in the sliding cylinder (32), the sliding rod (33) is fixedly connected to the rotating member (27), and a spring damper (34) is provided between the sliding rod (33) and the inner wall of the sliding cylinder (32).

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