Unit Flexographic Printing Press

Abstract

The present application relates to a unit-type flexographic printing press, which relates to the field of printing presses, and includes a frame, a paper feeding unit for conveying a paper roll to be printed, and a printing unit for printing the paper roll, and also includes a feed roller rotatably connected to the frame, wherein a cavity is provided inside the feed roller, and a plurality of air bags for positioning the paper roll and an adjusting assembly for adjusting the position of the air bags are provided in the cavity, a through slot for the air bags to extend out is provided on the peripheral wall of the feed roller, and a positioning assembly for positioning the end of the paper roll on the feed roller is provided on the frame. The present application has the effect of positioning the end of the printed paper roll on the paper roll to facilitate the unloading of the printed paper roll.

Description

Technical Field

[0001] This application relates to the field of printing presses, and more particularly to a unit-type flexographic printing press. Background Art

[0002] Unit-type flexographic printing presses typically employ a technical solution for corrugated paper flexographic printing consisting of a basic paper feeding unit and a printing unit. Flexographic printing presses use highly fluid inks. The ink is transferred to the image area of ​​the printing plate by the ink fountain roller and the anilox roller, and then the pressure roller applies printing pressure to transfer the ink from the printing plate to the substrate. Finally, the printing process is completed by the drying surface.

[0003] Currently, when flexographic printing presses print on paper rolls, after a roll of paper is printed and rewound onto the take-up roller, the printed paper roll needs to be manually unloaded and the end of the paper roll positioned on the roll, which is inconvenient to operate. Summary of the Invention

[0004] To minimize the problem of the end of the printed paper roll detaching from the roll and making it difficult to unload, this application provides a unit-type flexographic printing machine.

[0005] The technical solution of the unit-type flexographic printing press provided in this application is as follows:

[0006] A modular flexographic printing press includes a frame, a paper feeding unit for conveying a paper roll to be printed, and a printing unit for printing on the paper roll. It also includes a feed roller rotatably connected to the frame. The feed roller has a cavity inside, and the cavity contains a plurality of air bladders for positioning the paper roll and an adjustment assembly for adjusting the position of the air bladders. A through groove is formed on the peripheral wall of the feed roller for the air bladders to extend out. A positioning assembly is provided on the frame for positioning the end of the paper roll on the feed roller.

[0007] By adopting the above technical solution, when printing on a paper roll, the printed paper is wound around the feed roller to form a paper roll. Several air bladders extending from the through groove limit the inner cylinder of the paper roll, minimizing relative rotation between the inner cylinder and the feed roller. After printing, the end of the paper roll is positioned on the paper roll using a positioning component to prevent the end of the paper roll from detaching from the paper roll, which would be inconvenient for transportation. Finally, the position of the air bladders is adjusted using an adjusting component to disengage the air bladders from the inner cylinder of the paper roll, making it easier to unload the paper roll from the feed roller and simplifying the operation.

[0008] In one specific implementation, the adjusting assembly includes a plurality of first connecting rods and second connecting rods. The first connecting rods correspond one-to-one with the airbags. A moving plate is provided on the side wall of the airbag facing the cavity. The extending direction of the moving plate is parallel to the length direction of the feed roller. One end of the moving plate is hinged to the inner wall of the cavity, and the other end of the moving plate is hinged to one end of the first connecting rod. The other end of the first connecting rod is hinged to one end of the second connecting rod. The axial direction of the second connecting rod is collinear with the axial direction of the feed roller. A movable element is provided at the other end of the second connecting rod.

[0009] By adopting the above technical solution, when the paper roll is unloaded from the feed roller, the moving part drives the second connecting rod to move away from the first connecting rod. Several first and second connecting rods rotate relative to each other, and one end of the moving plate rotates relative to the feed roller. The other end of the moving plate moves towards the cavity under the drive of the first connecting rod until the moving plate drives the airbag to retract into the cavity. At this time, it is convenient to separate the paper roll from the feed roller, thus realizing the unloading of the paper roll.

[0010] In one specific implementation, the movable component includes a movable cylinder mounted on the frame, wherein the piston rod of the movable cylinder is fixedly connected to the end of the second connecting rod away from the first connecting rod.

[0011] By adopting the above technical solution, the second connecting rod is driven to move away from the first connecting rod by a movable cylinder, which is simple and convenient.

[0012] In one specific implementation, a lever for actuating the paper roll is provided on the peripheral wall of the second connecting rod away from the first connecting rod, and a through groove is provided on the peripheral wall of the feed roller for the lever to pass through.

[0013] By adopting the above technical solution, when the moving cylinder drives the second connecting rod to move away from the first connecting rod, the lever extends out of the slot under the drive of the second connecting rod and moves the inner cylinder of the paper roll, which helps to separate the inner cylinder of the paper roll from the feeding roller and facilitates feeding.

[0014] In one specific implementation, the end of the lever is provided with a pawl, the side wall of the pawl is provided with a first arc surface, the groove wall of the through groove is provided with a second arc surface, and the first arc surface and the second arc surface are in contact with each other.

[0015] By adopting the above technical solution, the first arc surface and the second arc surface are attached together, so that when the lever moves under the drive of the second connecting rod, the lever drives the pawl to move. Under the limit of the second arc surface, the lever extends out of the peripheral wall of the feeding roller and moves the inner cylinder of the paper roll.

[0016] In one specific implementation, several levers are evenly arranged along the circumference of the feed roller.

[0017] By adopting the above technical solution, several levers are used to make the inner cylinder of the paper roll evenly stressed, thus achieving a good separation effect between the inner cylinder of the paper roll and the feed roller.

[0018] In one specific implementation, the positioning assembly includes a tape roll and a transmission cylinder. The transmission cylinder is mounted on the frame, and the tape roll and the piston rod of the transmission cylinder are rotatably connected. The piston rod of the transmission cylinder is provided with a pressing member for pressing the tape roll against the paper roll, and the pressing member is provided with a fuse for melting the tape roll.

[0019] By adopting the above technical solution, after printing is completed, the transmission cylinder drives the pressing part and the tape roll to approach the paper roll, and the tape roll is used to stick the end of the paper roll to the paper roll. Finally, the tape roll is melted by the fuse wire to avoid the end of the paper roll from coming loose and affecting the paper roll feeding effect.

[0020] In one specific implementation, the pressing component includes a mounting bracket, a mounting rod, a plug rod, and a spring. The tape roll is rotatably connected to the mounting bracket. One end of the mounting rod is fixedly connected to the side wall of the mounting bracket away from the tape roll. The plug rod has a slot for the mounting rod to extend into. The plug rod is disposed on the piston rod of the transmission cylinder, and the spring is disposed in the slot.

[0021] By adopting the above technical solution, when it is necessary to position the end of the paper roll, the tape roll moves towards the paper roll under the drive of the transmission cylinder until the tape roll on the mounting frame is in contact with the side wall of the paper roll under the action of the mounting rod and the insertion rod. At this time, the spring is compressed, and one end of the tape roll abuts against the peripheral wall of the paper roll under the action of the spring force until one end of the tape roll is stuck to the peripheral wall of the paper roll. The rotation of the paper roll causes the tape roll to rotate, and the tape roll sticks the end of the paper roll to the paper roll, thus realizing the positioning of the end of the paper roll.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. When printing on a paper roll, the printed paper is wound around the feed roller to form a paper roll. Several air bladders extending from the through groove limit the inner cylinder of the paper roll to minimize relative rotation between the inner cylinder and the feed roller. After printing, the end of the paper roll is positioned on the paper roll using a positioning component to minimize the loosening of the end of the paper roll from the paper roll, which would be inconvenient for transportation. Finally, the position of the air bladders is adjusted using an adjusting component to disengage the air bladders from the inner cylinder of the paper roll, making it easier to unload the paper roll from the feed roller and simplifying the operation.

[0024] 2. By utilizing the contact between the first and second arc surfaces, when the lever moves under the drive of the second connecting rod, the lever drives the pawl to move. Under the limit of the second arc surface, the lever extends out of the peripheral wall of the feed roller and moves the inner cylinder of the paper roll. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a unit-type flexographic printing press according to an embodiment of this application.

[0026] Figure 2 This is a schematic diagram illustrating the overall structure of the feeding roller in the embodiments of this application.

[0027] Figure 3 This is a schematic diagram illustrating the overall structure of the positioning component in the embodiments of this application.

[0028] Figure 4 for Figure 3 A cross-sectional view along plane AA.

[0029] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0030] Figure 6 for Figure 4 Enlarged view of point B in the middle.

[0031] Figure 7 This is an exploded view illustrating the pressure-retaining component in the embodiments of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Paper feeding unit; 3. Printing unit; 4. Rotating component; 41. Driving gear; 42. Driven gear; 43. Drive motor; 5. Adjustment assembly; 51. First connecting rod; 52. Second connecting rod; 6. Positioning assembly; 61. Tape roll; 62. Transmission cylinder; 7. Moving component; 71. Moving cylinder; 8. Pressing component; 81. Mounting bracket; 82. Mounting rod; 83. Insert rod; 84. Spring; 9. Paper roll; 10. Feed roller; 11. Cavity; 12. Airbag; 13. Through slot; 14. Moving plate; 15. Lever; 16. Claw; 17. Through slot; 18. First arc surface; 19. Second arc surface; 20. Connecting column; 21. Slot; 22. Connecting plate; 23. Fuse wire; 24. Bearing. Detailed Implementation

[0033] The following is combined with Figure 1-7 This application will be described in further detail.

[0034] This application discloses a unit-type flexographic printing press.

[0035] Reference Figure 1 , Figure 2 and Figure 3 The unit-type flexographic printing press includes a frame 1, a paper feeding unit 2, and a printing unit 3. The paper feeding unit 2 is used to transport the paper roll 9 to be printed to the printing unit 3. The printing unit 3 is used to print on the paper roll 9. A feed roller 10 is also provided at the end of the frame 1 away from the paper feeding unit 2. The axis of the feed roller 10 is horizontally set. The feed roller 10 is rotatably connected to the frame 1. A rotating component 4 is provided on the frame 1 to drive the feed roller 10 to rotate. The rotating component 4 includes a drive gear 41, a driven gear 42, and a drive motor 43. The drive gear 41 is rotatably connected to the frame 1. The driven gear 42 and the feed roller 10 are coaxially fixedly connected. The driven gear 42 and the drive gear 41 mesh with each other. The output shaft of the drive motor 43 is drivenly connected to the drive gear 41. A positioning component 6 is provided on the frame 1 to position the end of the paper roll 9 on the feed roller 10.

[0036] Reference Figure 4 and Figure 5 The feed roller 10 has a cavity 11 inside, and four sets of airbags 12 for positioning the inner cylinder of the paper roll 9 are provided in the cavity 11. The four sets of airbags 12 are evenly distributed along the circumference of the feed roller 10. A through groove 13 for the airbags 12 to extend is provided on the circumferential wall of the feed roller 10. The length direction of the through groove 13 is parallel to the length direction of the feed roller 10. An adjustment component 5 for adjusting the position of the airbags 12 in the cavity 11 is provided in the cavity 11.

[0037] Reference Figure 4 and Figure 5 The adjustment assembly 5 includes four first connecting rods 51 and second connecting rods 52. The first connecting rods 51 correspond one-to-one with the airbags 12. A moving plate 14 is fixedly connected to the side wall of the airbags 12 facing the cavity 11. The length direction of the moving plate 14 is parallel to the length direction of the airbags 12. Both ends of the moving plate 14 extend out of the side wall of the airbags 12. The end of the moving plate 14 near the driven gear 42 is hinged to the cavity wall of the cavity 11. The end of the moving plate 14 away from the driven gear 42 is hinged to one end of the first connecting rod 51. The other end of the first connecting rod 51 is hinged to one end of the second connecting rod 52. The second connecting rod 52 is disposed in the cavity 11. The second connecting rod 52 is cylindrical. The axis of the second connecting rod 52 is collinear with the axis of the feed roller 10. The end of the second connecting rod 52 away from the first connecting rod 51 is provided with a moving part 7 for driving the second connecting rod 52 to slide along the axis of the feed roller 10.

[0038] When the paper roll 9 is unloaded from the feed roller 10, the moving part 7 drives the second connecting rod 52 to move away from the first connecting rod 51. The four first connecting rods 51 and the second connecting rod 52 rotate relative to each other. One end of the moving plate 14 and the feed roller 10 rotate relative to each other. The included angle between the first connecting rod 51 and the second connecting rod 52 increases. The other end of the moving plate 14 moves towards the cavity 11 under the drive of the first connecting rod 51 until the moving plate 14 drives the airbag 12 to retract into the cavity 11. At this time, it is convenient to separate the paper roll 9 from the feed roller 10, thus realizing the unloading of the paper roll 9.

[0039] Reference Figure 4 and Figure 6 The moving part 7 includes a moving cylinder 71. The cylinder body of the moving cylinder 71 is fixedly connected to the frame 1. The piston rod of the moving cylinder 71 extends into the cavity 11 and is rotatably connected to the end of the second connecting rod 52 away from the first connecting rod 51 through a bearing 24. Four sets of levers 15 are provided on the peripheral wall of the second connecting rod 52 away from the first connecting rod 51. One end of each set of levers 15 is rotatably connected to the second connecting rod 52. The four sets of levers 15 are evenly distributed along the circumference of the second connecting rod 52. The other end of the levers 15 is fixedly connected to a claw 16. A first arc surface 18 is provided on the side wall of the claw 16 away from the first connecting rod 51. A through groove 17 is provided on the peripheral wall of the feed roller 10 for the claw 16 to pass through. The through groove 17 is connected to the cavity 11. A second arc surface 19 is provided on the groove wall of the through groove 17 for cooperating with the first arc surface 18. The first arc surface 18 and the second arc surface 19 are in contact.

[0040] When the moving cylinder 71 drives the second connecting rod 52 to move away from the first connecting rod 51, the included angle between the lever 15 and the second connecting rod 52 increases. The four sets of claws 16 extend out of the slot 17 under the limit between the first arc surface 18 and the second arc surface 19, and move the inner cylinder of the paper roll 9. The paper roll 9 is evenly stressed under the action of the four sets of claws 16, so that the inner cylinder of the paper roll 9 drives the paper roll 9 to move away from the moving cylinder 71, which is conducive to the separation between the inner cylinder of the paper roll 9 and the feed roller 10, and facilitates feeding.

[0041] Reference Figure 7The positioning assembly 6 includes a tape roll 61 and a transmission cylinder 62. The cylinder body of the transmission cylinder 62 is fixedly connected to the frame 1. One end of the piston rod of the transmission cylinder 62 is fixedly connected to a pressing member 8 for mounting the tape roll 61 and pressing the tape roll 61 against the peripheral wall of the paper roll 9. The pressing member 8 includes a mounting frame 81, a mounting rod 82, an insert rod 83, and a spring 84. A connecting post 20 is fixedly connected to the mounting frame 81. The connecting post 20 is cylindrical. The tape roll 61 rotates through the connecting post 20. One end of the mounting rod 82 is fixedly connected to the side wall of the mounting frame 81 away from the tape roll 61. One end of the insertion rod 83 is fixedly connected to the piston rod of the transmission cylinder 62. The other end of the insertion rod 83 is provided with a slot 21. The extension direction of the slot 21 is parallel to the axial direction of the insertion rod 83. The end of the mounting rod 82 away from the mounting bracket 81 is slidably inserted into the slot 21. The spring 84 is provided in the slot 21. One end of the spring 84 is fixedly connected to the bottom of the slot 21. The other end of the spring 84 is fixedly connected to the end of the mounting rod 82 away from the mounting bracket 81. A connecting plate 22 is fixedly connected to the mounting bracket 81. A fuse 23 for melting the tape is provided on the connecting plate 22.

[0042] When it is necessary to position the end of the paper roll 9, the tape roll 61, the mounting bracket 81, and the connecting plate 22 move towards the paper roll 9 under the drive of the transmission cylinder 62. At this time, the spring 84 is compressed, and one end of the tape roll 61 abuts against the peripheral wall of the paper roll 9 under the elastic force of the spring 84 until one end of the tape roll 61 is adhered to the peripheral wall of the paper roll 9. The rotation of the paper roll 9 causes the tape roll 61 to rotate, and the tape roll 61 adheres the end of the paper roll 9 to the paper roll 9. Finally, the fuse 23 is energized, and the fuse 23 heats up, using the fuse 23 to melt the tape roll 61, so as to avoid the end of the paper roll 9 from loosening and affecting the feeding effect of the paper roll 9, thus achieving a good positioning effect for the end of the paper roll 9.

[0043] The implementation principle of a unit-type flexographic printing press according to an embodiment of this application is as follows: When printing on a paper roll 9, the printed paper is wound around the feed roller 10 to form a paper roll 9. Several air bladders 12 extending from the through groove 13 limit the inner cylinder of the paper roll 9 to avoid relative rotation between the inner cylinder of the paper roll 9 and the feed roller 10 as much as possible. After printing is completed, the positioning component 6 is used to position the end of the paper roll 9 on the paper roll 9 to avoid the end of the paper roll 9 from loosening and making transportation inconvenient. Finally, the position of the air bladders 12 is adjusted by the adjusting component 5 so that the air bladders 12 are separated from the inner cylinder of the paper roll 9, making it easier to unload the paper roll 9 from the feed roller 10 and making operation convenient.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A unit-type flexographic printing press, comprising a frame (1), a paper feeding unit (2) for feeding a paper roll (9) to be printed, and a printing unit (3) for printing the paper roll (9), characterized in that: It also comprises a feed roller (10) rotatably connected to the frame (1), a cavity (11) being arranged inside the feed roller (10), a plurality of air bags (12) for positioning the paper roll (9) and an adjusting component (5) for adjusting the position of the air bags (12) being arranged inside the cavity (11), a through slot (13) for the air bags (12) to extend out being opened on the peripheral wall of the feed roller (10), and a positioning component (6) for positioning the end of the paper roll (9) on the feed roller (10) being arranged on the frame (1); The adjustment assembly (5) comprises a plurality of first connecting rods (51) and second connecting rods (52), wherein the first connecting rods (51) correspond to the airbags (12) one by one, a moving plate (14) is arranged on the side wall of the airbag (12) facing the cavity (11), the extension direction of the moving plate (14) is parallel to the length direction of the unloading roller (10), one end of the moving plate (14) is hinged to the inner wall of the cavity (11), the other end of the moving plate (14) is hinged to one end of the first connecting rod (51), the other end of the first connecting rod (51) is hinged to one end of the second connecting rod (52), and the other end of the second connecting rod (52) is arranged with a moving part (7); A lever (15) for moving the paper roll (9) is arranged on the peripheral wall of the second connecting rod (52) away from the first connecting rod (51), and a through groove (17) for the lever (15) to pass through is provided on the peripheral wall of the unloading roller (10).

2. The unit-type flexographic printing press according to claim 1, characterized in that: The axial direction of the second connecting rod (52) and the axial direction of the unloading roller (10) are collinear.

3. The unit-type flexographic printing press according to claim 2, characterized in that: The moving member (7) comprises a moving cylinder (71), the moving cylinder (71) is arranged on the frame (1), and the piston rod of the moving cylinder (71) is fixedly connected to an end of the second connecting rod (52) away from the first connecting rod (51).

4. The unit-type flexographic printing press according to claim 1, characterized in that: A pusher claw (16) is provided at the end of the pusher rod (15), a first arc surface (18) is provided on the side wall of the pusher claw (16), a second arc surface (19) is provided on the groove wall of the through groove (17), and the first arc surface (18) and the second arc surface (19) are in contact with each other.

5. The unit-type flexographic printing press according to claim 4, characterized in that: A plurality of the shifting rods (15) are evenly arranged along the circumference of the unloading roller (10).

6. The unit-type flexographic printing press according to claim 1, characterized in that: The positioning assembly (6) comprises a tape roll (61) and a transmission cylinder (62), wherein the transmission cylinder (62) is arranged on the frame (1), the tape roll (61) and the piston rod of the transmission cylinder (62) are rotatably connected, the piston rod of the transmission cylinder (62) is provided with a pressing piece (8) for pressing the tape roll (61) against the paper roll (9), and the pressing piece (8) is provided with a fuse (23) for melting the tape roll (61).

7. The unit-type flexographic printing press according to claim 6, characterized in that: The pressing member (8) comprises a mounting frame (81), a mounting rod (82), an insertion rod (83) and a spring (84); the tape roll (61) is rotatably connected to the mounting frame (81); one end of the mounting rod (82) is fixedly connected to a side wall of the mounting frame (81) away from the tape roll (61); a slot (21) for the mounting rod (82) to extend into is formed on the insertion rod (83); the insertion rod (83) is arranged on the piston rod of the transmission cylinder (62); and the spring (84) is arranged in the slot (21).

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