Packing paper gravure press

Abstract

The invention belongs to the technical field of intaglio printing, and particularly relates to a packaging paper intaglio printing machine which comprises a printing machine box, an ink storage box, an intaglio roller and a scraper, two inking rollers are rotationally assembled in the ink storage box, and a pressing roller controlled by two electric telescopic rods is fixedly arranged in the printing machine box; two supporting bases controlled by supporting hydraulic cylinders are installed in the printing machine box, two rotating hydraulic cylinders controlling the supporting hydraulic cylinders respectively are rotationally assembled in the printing machine box, an upper roller plate and a lower roller plate are fixedly arranged on the front side wall and the rear side wall in the printing machine box, and a control piece matched with the scraper is arranged in the printing machine box. The gravure roller is driven to move through cooperation of the supporting hydraulic cylinder and the rotating hydraulic cylinder, the gravure roller is conveyed out of the printing machine box through cooperation of the lower roller plate, the gravure roller is conveyed into the printing machine box through the upper roller plate on the other side, the gravure roller is placed between the two upper ink rollers through cooperation of the rotating hydraulic cylinder and the supporting hydraulic cylinder, and the gravure roller is convenient to replace; downtime is shortened, and production efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of intaglio printing, and particularly relates to an intaglio printing press for wrapping paper. Background Art

[0002] In the packaging printing industry, intaglio printing presses are widely used in the printing of materials such as plastic films, papers, and aluminum foils due to their advantages of high printing quality, strong color expressiveness, and wide range of applicable materials. The core component of intaglio printing is the intaglio cylinder (also known as the plate cylinder), whose surface is engraved with specific pattern or text grooves, and printing is achieved through ink transfer. However, in the actual production process, due to frequent changes in product specifications, pattern designs, or customer requirements, the intaglio cylinder needs to be replaced. It is necessary to first perform a shutdown operation, disassemble auxiliary components such as scraping knives and pressure rollers, then disassemble the old intaglio cylinder, and finally install and debug the new cylinder, which consumes a large amount of time and manual effort. Therefore, an intaglio printing press for wrapping paper is needed to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide an intaglio printing press for wrapping paper. The output end of the supporting hydraulic cylinder drives the intaglio cylinder to move through telescoping, and the rotating hydraulic cylinder synchronously drives the supporting hydraulic cylinder and the intaglio cylinder to rotate, so as to convey the intaglio cylinder out of the printing machine box through the lower roller plate, and the upper roller plate on the other side conveys the intaglio cylinder into the printing machine box. The rotating hydraulic cylinder and the supporting hydraulic cylinder place the intaglio cylinder between two inking rollers, which is convenient for replacing the intaglio cylinder, shortening the shutdown time, and reducing the manual labor intensity.

[0004] To achieve the above technical purpose, the technical solution adopted by the present invention is as follows: An intaglio printing machine for wrapping paper, comprising a printing machine case, an ink storage box, an intaglio roller and a scraper. The ink storage box is fixedly installed inside the printing machine case, the intaglio roller is rotatably assembled inside the printing machine case, the scraper is installed inside the printing machine case. Two circular shafts are rotatably assembled inside the ink storage box and are symmetrically distributed left and right. Both of the two circular shafts are concentrically fixed with ink rollers. A cross plate is fixedly installed inside the printing machine case. Two electric telescopic rods are symmetrically distributed front and back and are fixedly installed under the cross plate. The output ends of the two electric telescopic rods are jointly rotatably assembled with a pressure roller. Two support hydraulic cylinders are rotatably assembled inside the printing machine case and are symmetrically distributed front and back. The output ends of the two support hydraulic cylinders are both concentrically fixed with support seats matching the intaglio roller. Two rotating hydraulic cylinders are rotatably assembled inside the printing machine case and are symmetrically distributed front and back. The output ends of the two rotating hydraulic cylinders are respectively hinged to the side walls of the support hydraulic cylinders. Upper roller plates matching the intaglio roller are fixedly installed on the front and back side walls inside the printing machine case. Lower roller plates matching the intaglio roller are fixedly installed on the front and back side walls inside the printing machine case. A transmission component matching the two circular shafts is arranged inside the printing machine case. A control component matching the scraper is arranged inside the printing machine case.

[0005] The transmission component includes an L-shaped plate slidably assembled on the front side of the ink storage box. A number of first springs linearly distributed are jointly fixed between the lower side wall of the L-shaped plate and the lower side wall inside the printing machine case. A first belt pulley is rotatably assembled on the front side of the L-shaped plate. A driving wheel matching the intaglio roller is concentrically fixed on the front side of the first belt pulley. A tension pulley is rotatably assembled on the front side of the L-shaped plate. Second belt pulleys are concentrically fixed on the front sides of the two circular shafts. A transmission belt is installed on the first belt pulley, the two second belt pulleys and the tension pulley. A driving component matching the two circular shafts is installed inside the printing machine case.

[0006] The driving component includes a motor installed inside the printing machine case. A third belt pulley is concentrically fixed on the circular shaft on the right side. A fourth belt pulley is concentrically fixed on the output shaft of the motor. A driving belt is jointly installed between the third belt pulley and the fourth belt pulley.

[0007] The control component includes a long plate slidably assembled inside the printing machine case. A long groove is formed on the right side of the long plate. A clamping plate matching the long groove is slidably assembled inside the printing machine case. A number of guide rods linearly distributed are fixedly installed on the left side of the clamping plate. A number of second springs matching the guide rods are fixed between the clamping plate and the long groove. A placement groove matching the scraper is formed on the clamping plate. Connecting rods are respectively fixed between the output ends of the electric telescopic rods and the side wall of the long plate.

[0008] Inside the printing machine case, two arc-shaped plates matching the upper roller plate are rotatably assembled. Inside the printing machine case, two upper roller hydraulic rods symmetrically distributed front and back are rotatably assembled. The output end of the upper roller hydraulic rod is hinged to the side wall of the arc-shaped plate. A third spring is commonly installed between the upper roller hydraulic rod and the arc-shaped plate.

[0009] On the right side of the printing machine case, a roller outlet is provided. A baffle matching the roller outlet is rotatably assembled on the right side of the printing machine case. Two support plates symmetrically distributed front and back are fixedly provided on the right side of the printing machine case. On the upper sides of the two support plates, roller outlet hydraulic rods are rotatably assembled. The output ends of the two roller outlet hydraulic rods are hinged to the side wall of the baffle. A fourth spring is fixedly provided between the roller outlet hydraulic rod and the baffle.

[0010] Arc-shaped blocks are fixedly provided on the lower sides of the rotating hydraulic cylinders. Two arc-shaped grooves matching the arc-shaped blocks are provided on the lower side inside the printing machine case. A T-shaped groove is provided on the upper side of the arc-shaped groove. A T-shaped block matching the T-shaped groove is fixedly provided on the lower side of the arc-shaped block.

[0011] Elastic telescopic rods are fixedly provided at the output ends of the two electric telescopic rods. Arc-shaped pressing plates matching the gravure cylinder are fixedly provided at the output ends of the elastic telescopic rods.

[0012] In the present invention, the telescopic movement of the output end of the support hydraulic cylinder drives the gravure cylinder to move, and the rotation of the rotating hydraulic cylinder synchronously drives the support hydraulic cylinder and the gravure cylinder to rotate. Thus, the gravure cylinder is conveyed out of the printing machine case through the lower roller plate, and the upper roller plate on the other side conveys the gravure cylinder into the printing machine case. The rotation of the rotating hydraulic cylinder and the support hydraulic cylinder place the gravure cylinder between the two inking rollers, which is convenient for replacing the gravure cylinder, shortening the downtime, and reducing the manual labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention can be further illustrated by the non-limiting embodiments given in the drawings.

[0014] Figure 1 is a schematic structural diagram of an embodiment of a gravure printing machine for wrapping paper of the present invention; Figure 2 is a schematic cross-sectional structural diagram of an embodiment of a gravure printing machine for wrapping paper of the present invention Figure 1 ; Figure 3 is Figure 2 an enlarged structural diagram of part A in Figure 4 is a schematic cross-sectional structural diagram of an embodiment of a gravure printing machine for wrapping paper of the present invention Figure 2 ; Figure 5 is Figure 4Schematic diagram of the enlarged structure at position B in [the relevant context]; Figure 6 is Figure 4 Schematic diagram of the enlarged structure at position C in [the relevant context]; Figure 7 This is a schematic cross-sectional structure diagram of a specific implementation of an intaglio printing press for wrapping paper according to an embodiment of the present invention.

[0015] The main component symbols are explained as follows: Printing machine case 10, ink storage box 11, intaglio roller 12, scraper 13, round shaft 14, inking roller 15, cross plate 16, electric telescopic rod 17, pressure roller 18, support hydraulic cylinder 19, support seat 20, rotating hydraulic cylinder 21, upper roller plate 22, lower roller plate 23, L-shaped plate 30, first spring 31, first pulley 32, driving wheel 33, tensioning wheel 34, second pulley 35, transmission belt 36, motor 40, third pulley 41, fourth pulley 42, driving belt 43, long plate 45, long groove 46, clamping plate 47, guide rod 48, second spring 49, connecting rod 50, arc plate 55, upper roller hydraulic rod 56, third spring 57, baffle 60, support plate 61, out-roller hydraulic rod 62, fourth spring 63, arc block 65, elastic telescopic rod 70, arc pressing plate 71. Specific implementation manner

[0016] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to the drawings and embodiments.

[0017] As Figure 1-7As shown in the figure, a gravure printing machine for wrapping paper according to the present invention includes a printing machine case 10, an ink storage box 11, a gravure roller 12, and a doctor blade 13. The ink storage box 11 is fixedly installed inside the printing machine case 10. The gravure roller 12 is rotatably assembled inside the printing machine case 10. The doctor blade 13 is installed inside the printing machine case 10. Two circular shafts 14 are rotatably assembled inside the ink storage box 11 and are symmetrically distributed left and right. Two ink application rollers 15 are concentrically fixed on both circular shafts 14. A cross plate 16 is fixedly installed inside the printing machine case 10. Two electric telescopic rods 17 are symmetrically distributed front and back and are fixedly installed under the cross plate 16. The output ends of the two electric telescopic rods 17 are jointly rotatably assembled with a pressure roller 18. Two support hydraulic cylinders 19 are rotatably assembled inside the printing machine case 10 and are symmetrically distributed front and back. The output ends of the two support hydraulic cylinders 19 are concentrically fixed with support seats 20 that match the gravure roller 12. Two rotating hydraulic cylinders 21 are rotatably assembled inside the printing machine case 10 and are symmetrically distributed front and back. The output ends of the two rotating hydraulic cylinders 21 are hinged to the side walls of the support hydraulic cylinders 19 respectively. Upper roller plates 22 that match the gravure roller 12 are fixedly installed on the front and back side walls inside the printing machine case 10. Lower roller plates 23 that match the gravure roller 12 are fixedly installed on the front and back side walls inside the printing machine case 10. A transmission component that matches the two circular shafts 14 is arranged inside the printing machine case 10. A control component that matches the doctor blade 13 is arranged inside the printing machine case 10; The transmission component includes an L-shaped plate 30 that is slidably assembled on the front side of the ink storage box 11. A number of first springs 31 are linearly distributed and fixedly installed between the lower side wall of the L-shaped plate 30 and the lower side wall inside the printing machine case 10. A first pulley 32 is rotatably assembled on the front side of the L-shaped plate 30. A driving wheel 33 that matches the gravure roller 12 is concentrically fixed on the front side of the first pulley 32. A tension pulley 34 is rotatably assembled on the front side of the L-shaped plate 30. Second pulleys 35 are concentrically fixed on the front sides of the two circular shafts 14. A transmission belt 36 is installed on the first pulley 32, the two second pulleys 35, and the tension pulley 34 together. A driving component that matches the two circular shafts 14 is installed inside the printing machine case 10; The driving component includes a motor 40 installed inside the printing machine case 10. A third pulley 41 is concentrically fixed on the circular shaft 14 on the right side. A fourth pulley 42 is concentrically fixed on the output shaft of the motor 40. A driving belt 43 is installed between the third pulley 41 and the fourth pulley 42; The control component includes a long plate 45 that is slidably assembled inside the printing machine case 10. A long groove 46 is opened on the right side of the long plate 45. A clamping plate 47 that matches the long groove 46 is slidably assembled inside the printing machine case 10. A number of guide rods 48 are linearly distributed and fixedly installed on the left side of the clamping plate 47. A number of second springs 49 that match the guide rods 48 are fixedly installed between the clamping plate 47 and the long groove 46. A placement groove that matches the doctor blade 13 is opened on the clamping plate 47. Connecting rods 50 are fixedly installed between the output ends of the electric telescopic rods 17 and the side wall of the long plate 45 respectively; A control panel is installed in this device. The control panel is electrically connected to the electric telescopic rod 17, the support hydraulic cylinder 19, the rotating hydraulic cylinder 21, the motor 40, etc. The user can control each component through the control panel and can also adjust various printing parameters for convenient use. During the use of the present invention, when the gravure cylinder 12 needs to be replaced, the operator first stops the printing machine case 10, and then operates the output end of the electric telescopic rod 17 to contract through the control panel. At the same time, the output end of the support hydraulic cylinder 19 extends, so that the pressure roller 18, the squeegee 13 and the gravure cylinder 12 rise synchronously. Under the elastic action of the first spring 31, the L-shaped plate 30 is pushed to rise synchronously. The L-shaped plate 30 drives the first pulley 32, the driving wheel 33 and the tension pulley 34 to rise synchronously. Thus, after the gravure cylinder 12 is separated from the two inking rollers 15, the driving wheel 33 still abuts against the gravure cylinder 12, and the squeegee 13 abuts against the surface of the gravure cylinder 12. The output shaft of the motor 40 drives the round shaft 14 to rotate through the third pulley 41, the fourth pulley 42 and the driving belt 43. The round shaft 14 drives the driving wheel 33 to rotate through the second pulley 35, the first pulley 32, the tension pulley 34 and the transmission belt 36, thereby driving the gravure cylinder 12 to rotate. During the rotation of the gravure cylinder 12, the squeegee 13 scrapes off the excess ink on the surface of the gravure cylinder 12, thereby preventing it from dripping onto the surfaces of other parts inside the printing machine case 10 and reducing the cleaning and maintenance cost of the printing machine case 10. During the use of the device, after the ink on the surface of the gravure cylinder 12 is processed, the output end of the electric telescopic rod 17 further contracts, thereby driving the squeegee 13 and the pressure roller 18 away from the gravure cylinder 12. The output end of the rotating hydraulic cylinder 21 extends, driving the support hydraulic cylinder 19 to rotate, and synchronously driving the gravure cylinder 12 to rotate. After the gravure cylinder 12 is located above the lower roller plate 23, the output end of the support hydraulic cylinder 19 contracts, placing the gravure cylinder 12 on the upper side of the two lower roller plates 23. The inclined lower roller plate 23 transports the gravure cylinder 12 out of the printing machine case 10. Under the synchronous operation of the rotating hydraulic cylinder 21 and the support hydraulic cylinder 19, the support seat 20 is aligned with the right side of the upper roller plate 22. The operator transports the new gravure cylinder 12 into the printing machine case 10 through the upper roller plate 22. The new gravure cylinder 12 slides into the support seat 20 along the upper roller plate 22. With the cooperation of the support hydraulic cylinder 19 and the rotating hydraulic cylinder 21, the new gravure cylinder 12 is placed above the two inking rollers 15. The gravure cylinder 12 pushes the L-shaped plate 30 to descend through the driving wheel 33, thereby ensuring that the inking rollers 15 and the driving wheel 33 drive the gravure cylinder 12 to rotate synchronously. During the replacement of the gravure cylinder 12 by resetting the pressure roller 18 and the squeegee 13 through the electric telescopic rod 17, there is no need for too much manual operation, reducing the labor intensity of the workers and having a faster replacement efficiency. Further, under the action of the L-shaped plate 30 and the first spring 31, the device can use gravure cylinders 12 with different diameters, so that the device can adapt to different printing requirements; Further, the electric telescopic rod 17 is used to control the pressing force between the pressure roller 18 and the gravure cylinder 12, so that the device can print packaging paper of different materials; Further, the inner part of the ink storage box 11 is processed into an arc shape matching the two inking rollers 15, so that the ink in the ink storage box 11 is gathered, which is convenient for the inking rollers 15 to ink; Further, two cover plates are rotatably assembled on the upper side of the ink storage box 11 to shield the internal ink and the inking rollers 15, preventing sundries and the like from entering and polluting the ink, and also facilitating the operator to clean the inking rollers 15 and the inside of the ink storage box 11; Further, the tension pulley 34 can be disassembled, which is convenient for the operator to quickly replace the transmission belt 36; Further, the scraper 13 can be disassembled and separated from the clamping plate 47, which is convenient for the operator to replace the scraper 13; In the present invention, the telescopic movement of the output end of the support hydraulic cylinder drives the gravure cylinder to move, and the rotation hydraulic cylinder synchronously drives the support hydraulic cylinder and the gravure cylinder to rotate, so that the gravure cylinder is conveyed out of the printing machine box through the lower roller plate, and the upper roller plate on the other side conveys the gravure cylinder into the printing machine box. The rotation hydraulic cylinder and the support hydraulic cylinder are used to place the gravure cylinder between the two inking rollers, which is convenient for replacing the gravure cylinder, shortening the downtime and reducing the labor intensity of the workers.

[0018] Two arc-shaped plates 55 matching the upper roller plate 22 are rotatably assembled inside the printing machine box 10. Two upper roller hydraulic rods 56 are rotatably assembled inside the printing machine box 10 and are symmetrically distributed front and back. The output end of the upper roller hydraulic rod 56 is hinged to the side wall of the arc-shaped plate 55. A third spring 57 is jointly installed between the upper roller hydraulic rod 56 and the arc-shaped plate 55; During the use of the device, when a new gravure cylinder 12 is placed on the left side of the upper roller plate 22, the gravure cylinder 12 moves along the upper roller plate 22, finally abuts against the arc-shaped plate 55, and pushes the arc-shaped plate 55 to rotate, causing the output end of the upper roller hydraulic rod 56 to contract, and the third spring 57 is also compressed. Thus, the moving potential energy of the gravure cylinder 12 is buffered, the service life of the device is prolonged, and the third spring 57 ensures the automatic reset of the arc-shaped plate 55, which is convenient for the next use.

[0019] On the right side of the printing chassis 10, there is an outlet roller opening. On the right side of the printing chassis 10, a baffle 60 that matches the outlet roller opening is rotatably assembled. On the right side of the printing chassis 10, two support plates 61 are fixedly arranged in a front-back symmetric distribution. On the upper sides of the two support plates 61, outlet roller hydraulic rods 62 are rotatably assembled. The output ends of the two outlet roller hydraulic rods 62 are hinged to the side wall of the baffle 60. Fourth springs 63 are fixedly arranged between the outlet roller hydraulic rods 62 and the baffle 60. During the use of this device, when the replaced gravure cylinder 12 is placed on the left side of the lower roller plate 23, the gravure cylinder 12 moves along the lower roller plate 23 and finally abuts against the baffle 60, pushing the baffle 60 to rotate. The baffle 60 causes the output end of the outlet roller hydraulic rod 62 to contract and compresses the fourth spring 63, thereby buffering the moving potential energy of the gravure cylinder 12, facilitating the operator to take out the gravure cylinder 12. The reset of the fourth spring 63 to the baffle 60 ensures the buffering of the next replaced gravure cylinder 12 and also prevents other sundries from entering the interior of the printing chassis 10, ensuring the cleanliness of the ink and the printing quality.

[0020] On the lower sides of the rotating hydraulic cylinders 21, arc-shaped blocks 65 are fixedly arranged. On the lower side inside the printing chassis 10, two arc-shaped grooves that match the arc-shaped blocks 65 are opened. On the upper side of the arc-shaped grooves, T-shaped grooves are opened. On the lower side of the arc-shaped blocks 65, T-shaped blocks that match the T-shaped grooves are fixedly arranged; facilitating the rotation of the rotating hydraulic cylinders 21 through the arc-shaped blocks 65 and the arc-shaped grooves, reducing friction, and extending the service life. On the output ends of the two electric telescopic rods 17, elastic telescopic rods 70 are fixedly arranged. On the output ends of the elastic telescopic rods 70, arc-shaped pressing plates 71 that match the gravure cylinder 12 are fixedly arranged; limiting the gravure cylinder 12 to ensure the smooth use of this device.

[0021] The above embodiments only exemplarily illustrate the principles and effects of the present invention, rather than being used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An intaglio printing press for wrapping paper, comprising a printing machine case, an ink storage cartridge, an intaglio cylinder and a doctor blade, characterized in that: The ink storage cartridge is fixedly installed inside the printing machine case. The gravure roll is rotatably assembled inside the printing machine case. The scraper is installed inside the printing machine case. Two circular shafts symmetrically distributed left and right are rotatably assembled inside the ink storage cartridge. Two ink application rollers are concentrically fixed on the two circular shafts. A cross plate is fixedly installed inside the printing machine case. Two electric telescopic rods symmetrically distributed front and back are fixedly installed on the lower side of the cross plate. The output ends of the two electric telescopic rods are jointly rotatably assembled with a pressure roller. Two support hydraulic cylinders symmetrically distributed front and back are rotatably assembled inside the printing machine case. Support seats matching the gravure roll are concentrically fixed on the output ends of the two support hydraulic cylinders. Two rotating hydraulic cylinders symmetrically distributed front and back are rotatably assembled inside the printing machine case. The output ends of the two rotating hydraulic cylinders are hinged to the side walls of the support hydraulic cylinders respectively. Upper roller plates matching the gravure roll are fixedly installed on the front and back side walls inside the printing machine case. Lower roller plates matching the gravure roll are fixedly installed on the front and back side walls inside the printing machine case. A transmission assembly matching the two circular shafts is arranged inside the printing machine case. A control member matching the scraper is arranged inside the printing machine case.

2. The gravure printing press for wrapping paper according to claim 1, characterized in that: The transmission assembly includes an L-shaped plate slidably assembled on the front side of the ink storage cartridge. A number of first springs linearly distributed are jointly fixed between the lower side wall of the L-shaped plate and the lower side wall inside the printing machine case. A first belt pulley is rotatably assembled on the front side of the L-shaped plate. A driving wheel matching the gravure roll is concentrically fixed on the front side of the first belt pulley. A tension pulley is rotatably assembled on the front side of the L-shaped plate. Second belt pulleys are concentrically fixed on the front sides of the two circular shafts. A transmission belt is installed on the first belt pulley, the two second belt pulleys and the tension pulley together. A driving member matching the two circular shafts is installed inside the printing machine case.

3. The gravure printing machine for wrapping paper according to claim 2, wherein: The driving member includes a motor installed inside the printing machine case. A third belt pulley is concentrically fixed on the circular shaft on the right side. A fourth belt pulley is concentrically fixed on the output shaft of the motor. A driving belt is jointly installed between the third belt pulley and the fourth belt pulley.

4. The gravure printing press for wrapping paper according to claim 1, wherein: The control member includes a long plate slidably assembled inside the printing machine case. A long groove is formed on the right side of the long plate. A clamping plate matching the long groove is slidably assembled inside the printing machine case. A number of guide rods linearly distributed are fixedly installed on the left side of the clamping plate. A number of second springs matching the guide rods are fixed between the clamping plate and the long groove. A placement groove matching the scraper is formed on the clamping plate. Connecting rods are respectively fixed between the output end of the electric telescopic rod and the side wall of the long plate.

5. A gravure printing press for wrapping paper according to claim 1, characterized in that: Two arc-shaped plates matching the upper roller plates are rotatably assembled inside the printing machine case. Two upper roller hydraulic rods symmetrically distributed front and back are rotatably assembled inside the printing machine case. The output end of the upper roller hydraulic rod is hinged to the side wall of the arc-shaped plate. A third spring is jointly installed between the upper roller hydraulic rod and the arc-shaped plate.

6. A gravure printing press for wrapping paper according to claim 1, characterized in that: A roll outlet is provided on the right side of the printing machine case. A baffle matching the roll outlet is rotatably assembled on the right side of the printing machine case. Two support plates symmetrically distributed front and back are fixedly provided on the right side of the printing machine case. Roll-out hydraulic rods are rotatably assembled on the upper sides of the two support plates. The output ends of the two roll-out hydraulic rods are hinged to the side wall of the baffle respectively. Fourth springs are fixedly provided between the roll-out hydraulic rods and the baffle respectively.

7. A gravure printing press for wrapping paper according to claim 1, characterized in that: Arc-shaped blocks are fixedly provided on the lower sides of the rotating hydraulic cylinders respectively. Two arc-shaped grooves matching the arc-shaped blocks are provided on the lower side inside the printing machine case. A T-shaped groove is provided on the upper side of the arc-shaped groove. A T-shaped block matching the T-shaped groove is fixedly provided on the lower side of the arc-shaped block.

8. The gravure printing press for wrapping paper according to claim 1, characterized in that: Elastic telescopic rods are fixedly provided on the output ends of the two electric telescopic rods respectively. Arc-shaped pressing plates matching the gravure cylinder are fixedly provided on the output ends of the elastic telescopic rods respectively.

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