Automatic cutting structure of paper photogravure press

Abstract

The utility model discloses an automatic cutting structure of a paper gravure printing machine, which relates to the technical field of printing machines, and comprises an unwinding frame, a first unwinding seat and a second unwinding seat, the top end of the inner wall of the unwinding frame is rotatably connected with the first unwinding seat, and the middle part of the inner wall of the unwinding frame is rotatably connected with the second unwinding seat; a winding frame is arranged on one side of the outer wall of the unwinding frame, rocker arms are rotationally connected to the two sides of the middle of the winding frame, a base is connected to the middle of the top end of the base, mounting bases are slidably connected to the two sides of the outer wall of the base, the number of the mounting bases is two, the outer wall of one mounting base is connected with a first cutting knife, and the outer wall of the other mounting base is connected with a second cutting knife. Transmission pins are fixedly connected to the two sides of the outer wall of the mounting base, and rotating bases are slidably connected to the outer walls of the transmission pins. According to the automatic cutting structure of the paper photogravure press, the cutters can be alternately switched on line, the cutters can be replaced without shutdown of the whole machine, and the non-planned shutdown time is shortened.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, specifically to an automatic cutting structure for a paper gravure printing machine. Background Technology

[0002] A gravure printing press is an industrial printing device that uses gravure printing technology to perform large-scale, high-quality printing on paper substrates. The image areas of the printing plate are recessed cells, while the blank areas remain flat. During printing, the entire printing cylinder is first coated with ink, and then a doctor blade scrapes away the ink from the blank areas, leaving only the ink in the recessed cells. Under immense pressure, the paper comes into contact with the printing cylinder, transferring the ink from the cells directly to the paper surface, thus forming the image. The automatic cutting structure of a gravure printing press refers to a device integrated at the end of a roll-to-roll gravure printing production line that rapidly, accurately, and automatically cuts the continuously printed and dried rolls of paper into single sheets according to preset length or positioning requirements.

[0003] In the current paper cutting structure, the cutting blade is a consumable part. Once it is worn or damaged, the machine must be stopped immediately for replacement, which forces production to stop. Moreover, the replacement of the cutting blade involves disassembling multiple parts, and the blade replacement operation is cumbersome and time-consuming, resulting in long equipment downtime and affecting production cycle and delivery efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an automatic cutting structure for a paper gravure printing machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic cutting structure for a paper gravure printing machine, comprising an unwinding frame, a first unwinding seat, and a second unwinding seat. The first unwinding seat is rotatably connected to the top of the inner wall of the unwinding frame, and the second unwinding seat is rotatably connected to the middle of the inner wall of the unwinding frame. A winding frame is provided on one side of the outer wall of the unwinding frame, and rocker arms are rotatably connected to both sides of the middle of the winding frame. Telescopic columns are rotatably connected to both sides of the bottom end of the winding frame. An electric push column is installed in the middle of the rocker arm, and the output end of the electric push column is connected to a squeeze roller through the frame. An electric push rod is installed on the side of the rocker arm away from the winding frame, and the output end of the electric push rod is fixedly connected to a base.

[0006] The telescopic column is used to drive the rocker arm closer to the paper; the electric push column is used to drive the squeeze roller closer to the paper anti-roll roller; the electric push rod is used to drive the cutting mechanism to move upward to cut the paper.

[0007] The base is connected to the middle of the top of the base, and mounting seats are slidably connected to both sides of the outer wall of the base. There are two sets of mounting seats. One set of mounting seats is connected to a first cutting blade on the outer wall, and the other set of mounting seats is connected to a second cutting blade on the outer wall. A transmission pin is fixedly connected to both sides of the outer wall of the mounting seat, and a rotating seat is slidably connected to the outer wall of the transmission pin.

[0008] The rotating base, in conjunction with the transmission pin and the mounting base, is used to realize the alternating movement of the first cutting blade and the second cutting blade.

[0009] Moving the mounting base will cause the No. 1 and No. 2 cutting blades to move together, so that the No. 1 and No. 2 cutting blades move alternately. This causes the worn No. 1 cutting blade to move down out of the working area, while the intact No. 2 cutting blade moves up into the working area.

[0010] Preferably, the output end of the telescopic column is rotatably connected to the rocker arm, and the mounting base, the bottom ends of the first and second cutting blades are provided with threaded holes for fixing. The rotating base has an "I" shaped structure, and the middle part of the rotating base is rotatably connected to the base.

[0011] At this point, the worker can also unscrew the bolt inside the threaded hole on the outer wall of the No. 1 cutter to release the lock on the No. 1 cutter. Then, remove the No. 1 cutter, connect the intact cutter to the corresponding mounting base, and then rotate the bolt to insert the cutter and the mounting base, thereby completing the replacement of the damaged cutter.

[0012] Preferably, the transmission pin has a "T" shaped cross-section, and the outer wall of the rotating seat has grooves on both sides corresponding to the transmission pin. The base has a "T" shaped structure, and the bottom two sides of the base are fixedly connected with limit plates.

[0013] Rotating the rotating seat causes the transmission pins on both sides inside to slide. The movement of the transmission pins will cause the mounting seat to move together. Since the outer wall of the mounting seat is fixedly connected to the side near the base, the limiting component slides along the base, thereby guiding the mounting seat to move smoothly vertically.

[0014] Preferably, the base has limiting cavities on both sides corresponding to the limiting plate, and a screw is threadedly connected to the middle of the base, with the screw and the limiting plate being through-connected.

[0015] By rotating the screw to disengage from the limiting plate, the locking of the limiting plate and the base connected to it is released. Then, the base is moved vertically until the limiting plate is disengaged from the base, at which point it can be removed for cleaning and maintenance.

[0016] Preferably, the top two sides of the base are fixedly connected to support plates, and the top of the support plates is connected to a fixed seat, and one side of the outer wall of the fixed seat can extend into the rotating seat.

[0017] By moving the fixed seat inside the support plate, it is disengaged from the rotating seat, thus releasing the lock on the rotating seat.

[0018] As can be seen from the above, the automatic cutting structure for paper gravure printing machines provided by this utility model has the following beneficial effects.

[0019] The cutting blades can be switched online, allowing for blade replacement without stopping the entire machine, reducing unplanned downtime and ensuring stable production rhythm. Furthermore, the dual-blade alternation mode allows for quick switching to the backup blade when the main blade is damaged, restoring the cutting function without stopping the machine and reducing the frequency of blade replacement.

[0020] The independent modular design of the base makes the disassembly, cleaning and maintenance of the entire cutting unit very convenient, shortening the maintenance cycle. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the unwinding seat, rocker arm, and telescopic column of this utility model;

[0023] Figure 3 This is a schematic diagram of the main structure of the electric push column, extrusion roller, electric push rod, and base of this utility model;

[0024] Figure 4 This is a three-dimensional structural diagram of the base and pedestal of this utility model;

[0025] Figure 5 This is a three-dimensional structural diagram of the limiting plate, cutting blade, and rotating seat of this utility model;

[0026] Figure 6 This is a schematic diagram of the main sectional view of the base and limiting plate of this utility model;

[0027] Figure 7 This is a three-dimensional structural diagram of the mounting base and cutting blade of this utility model;

[0028] Figure 8 This is a side view of the support plate and fixing seat of this utility model.

[0029] In the diagram: 1. Unwinding frame; 2. Unwinding seat No. 1; 3. Unwinding seat No. 2; 4. Rewinding frame; 5. Rocker arm; 6. Telescopic column; 7. Electric push column; 8. Extrusion roller; 9. Electric push rod; 10. Base; 11. Limiting plate; 12. Base; 13. Screw; 14. Mounting seat; 15. Cutting blade No. 1; 16. Cutting blade No. 2; 17. Transmission pin; 18. Rotating seat; 19. Support plate; 20. Fixed seat. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-8 This utility model provides a technical solution: an automatic cutting structure for a paper gravure printing machine, including an unwinding frame 1, a first unwinding seat 2 and a second unwinding seat 3. The first unwinding seat 2 is rotatably connected to the top of the inner wall of the unwinding frame 1, and the second unwinding seat 3 is rotatably connected to the middle of the inner wall of the unwinding frame 1. A winding frame 4 is provided on one side of the outer wall of the unwinding frame 1, and rocker arms 5 are rotatably connected to both sides of the middle of the winding frame 4. Telescopic columns 6 are rotatably connected to both sides of the bottom end of the winding frame 4. An electric push column 7 is installed in the middle of the rocker arm 5, and the output end of the electric push column 7 is connected to a squeeze roller 8 through the frame. An electric push rod 9 is installed on the side of the rocker arm 5 away from the winding frame 4, and the output end of the electric push rod 9 is fixedly connected to a base 10.

[0032] Telescopic column 6 is used to drive rocker arm 5 to approach the paper; electric push column 7 is used to drive squeeze roller 8 to approach paper anti-roll roller; electric push rod 9 is used to drive cutting mechanism to move upward to cut paper.

[0033] The base 10 is connected to the middle of the top of the base 12, and the mounting seats 14 are slidably connected to both sides of the outer wall of the base 12. There are two sets of mounting seats 14. One set of mounting seats 14 is connected to the outer wall of the first cutting blade 15, and the other set of mounting seats 14 is connected to the outer wall of the second cutting blade 16. The two sides of the outer wall of the mounting seats 14 are fixedly connected to the transmission pins 17, and the outer wall of the transmission pins 17 is slidably connected to the rotating seat 18.

[0034] The rotating base 18, in conjunction with the transmission pin 17 and the mounting base 14, is used to realize the alternating movement of the first cutting blade 15 and the second cutting blade 16;

[0035] The output end of the telescopic column 6 is rotatably connected to the rocker arm 5. The mounting base 14, the bottom ends of the first cutting blade 15 and the second cutting blade 16 are all provided with threaded holes for fixing. The rotating base 18 has an "I" shaped structure, and the middle part of the rotating base 18 is rotatably connected to the base 12. The transmission pin 17 has a "T" shaped cross section, and the outer walls of the rotating base 18 have grooves on both sides corresponding to the transmission pin 17. The base 12 has a "T" shaped structure, and the bottom ends of the base 12 are fixedly connected to the limit plates 11. The base 10 has limit cavities on both sides inside corresponding to the limit plates 11, and the middle part of the base 10 is threadedly connected to the screw 13, and the screw 13 is connected to the limit plate 11 through. The top ends of the base 10 are fixedly connected to the support plates 19, and the top ends of the support plates 19 are connected to the fixed base 20, and one side of the outer wall of the fixed base 20 can extend into the rotating base 18.

[0036] For specific implementation, please refer to Figure 1 , Figure 2 and Figure 3 When the remaining amount of paper roll carried by the second unwinding seat 3 on the unwinding frame 1 drops to the preset threshold, the pneumatic cone top mechanism precisely clamps and positions the spare paper roll in the first unwinding seat 2, and activates the servo pre-drive system to achieve precise synchronization between the spare paper roll line speed and the printing production line speed; then the telescopic column 6 at the bottom of the rewinding frame 4 is triggered to extend, driving the rocker arm 5 to move towards the paper roll overlap area; then the electric push column 7 is activated to extend, driving the squeeze roller 8 to press the overlap interface of the new and old paper rolls; then the electric push rod 9 drives the base 10 to complete the vertical displacement, and the cutting blade above the base 10 performs the old roll cutting action; the constant tension control system synchronously completes the seamless switching of the tension of the new and old rolls, thereby realizing the roll changing and cutting operation without stopping the machine or reducing the speed.

[0037] See Figure 4 and Figure 5 When the cutting blades wear out or are damaged during operation, firstly, the fixed seat 20 inside the support plate 19 is moved to disengage it from the rotating seat 18, thus releasing the mechanical lock on the rotating seat 18. Then, the rotating seat 18 is rotated, driving the transmission pins 17 on both sides inside to slide along a preset track. The displacement of the transmission pins 17 will drive the mounting seat 14 to move synchronously. Since a limiting component is fixed on the side of the outer wall of the mounting seat 14 near the base 12, the limiting component slides along the guide groove of the base 12, thereby guiding the mounting seat 14 to achieve a smooth vertical linear movement. The displacement of the mounting seat 14 will synchronously drive the first cutting blade 15 and the second cutting blade 16 to switch alternately, so that the worn first cutting blade 15 is moved out of the working area and the intact second cutting blade 16 is moved into the working area, realizing the rapid online switching of cutting blades and ensuring production continuity.

[0038] See Figure 7Workers can loosen the fastening bolts in the threaded hole on the outer wall of the No. 1 cutting blade 15 to release the locking constraint on the No. 1 cutting blade 15. Then, the worn No. 1 cutting blade 15 can be removed, and the spare intact cutting blade can be precisely connected with the mounting base 14. Finally, the fastening bolts can be tightened to complete the locking installation of the cutting blade, thus enabling the rapid replacement of the damaged cutting blade.

[0039] See Figure 6 Workers can rotate screw 13 to disengage it from the limit plate 11, thus removing the locking constraint on the limit plate 11 and the connected base 12. Then, the base 12 can be moved vertically until the limit plate 11 is completely disconnected from the base 10, at which point the base 12 can be removed as a whole for cleaning, inspection, or maintenance.

[0040] The cutting blades in this solution can be switched online, and the blade replacement can be completed without stopping the entire machine, reducing unplanned downtime and ensuring stable production rhythm; in addition, the dual cutting blade alternating mode can quickly switch to the spare blade when the main blade is damaged, and the cutting function can be restored without stopping the machine, reducing the frequency of blade replacement.

[0041] The independent 12-module base design makes the disassembly, cleaning and maintenance of the entire cutting unit very convenient, shortening the maintenance cycle.

[0042] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. An automatic cutting structure for a paper gravure printing machine, comprising an unwinding frame (1), a first unwinding seat (2), and a second unwinding seat (3), wherein the first unwinding seat (2) is rotatably connected to the top of the inner wall of the unwinding frame (1), and the second unwinding seat (3) is rotatably connected to the middle of the inner wall of the unwinding frame (1), characterized in that: A take-up frame (4) is provided on one side of the outer wall of the unwinding frame (1), and rocker arms (5) are rotatably connected to both sides of the middle part of the take-up frame (4), and telescopic columns (6) are rotatably connected to both sides of the bottom end of the take-up frame (4). An electric push column (7) is installed in the middle of the rocker arm (5), and the output end of the electric push column (7) is connected to a squeeze roller (8) through the frame. An electric push rod (9) is installed on the side of the rocker arm (5) away from the take-up frame (4), and a base (10) is fixedly connected to the output end of the electric push rod (9). The telescopic column (6) is used to drive the rocker arm (5) to approach the paper; the electric push column (7) is used to drive the squeeze roller (8) to approach the paper anti-roll roller; the electric push rod (9) is used to drive the cutting mechanism to move upward to cut the paper. The base (10) is connected to the middle of the top of the base (12), and the mounting base (14) is slidably connected to both sides of the outer wall of the base (12). There are two sets of mounting bases (14). One set of mounting bases (14) is connected to the outer wall of a first cutting blade (15), and the other set of mounting bases (14) is connected to the outer wall of a second cutting blade (16). The two sides of the outer wall of the mounting base (14) are fixedly connected to transmission pins (17), and the outer wall of the transmission pins (17) is slidably connected to a rotating seat (18). The rotating seat (18) works in conjunction with the transmission pin (17) and the mounting seat (14) to enable the alternating movement of the first cutting blade (15) and the second cutting blade (16).

2. The automatic cutting structure of the paper gravure printing machine according to claim 1, characterized in that: The output end of the telescopic column (6) is rotatably connected to the rocker arm (5). The mounting base (14), the bottom ends of the first cutting blade (15) and the second cutting blade (16) are all provided with threaded holes for fixing. The rotating base (18) has an "I" shaped structure, and the middle part of the rotating base (18) is rotatably connected to the base (12).

3. The automatic cutting structure of the paper gravure printing machine according to claim 2, characterized in that: The transmission pin (17) has a "T" shaped cross section, and the outer wall of the rotating seat (18) has grooves on both sides corresponding to the transmission pin (17). The base (12) has a "T" shaped structure, and the bottom ends of the base (12) are fixedly connected to limit plates (11).

4. The automatic cutting structure for a paper gravure printing machine according to claim 3, characterized in that: The base (10) has limiting cavities on both sides corresponding to the limiting plate (11), and a screw (13) is threadedly connected to the middle of the base (10), and the screw (13) and the limiting plate (11) are connected through.

5. The automatic cutting structure of the paper gravure printing machine according to claim 4, characterized in that: The base (10) has a support plate (19) fixedly connected to both sides of its top end, and a fixed seat (20) is connected inside the top end of the support plate (19), and one side of the outer wall of the fixed seat (20) can extend into the interior of the rotating seat (18).

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