Intermittent flexographic printing device

Abstract

The utility model relates to the technical field of flexographic printing machines, in particular to an intermittent flexographic printing device. An ink fountain, an anilox roller and a forme roller are arranged on one side of the machine body, an ink transfer roller is installed in the ink fountain, a printing roller is arranged on the side, away from the anilox roller, of the forme roller, a driving mechanism for driving the anilox roller and the forme roller to rotate is arranged on one side of the anilox roller, a movable support is arranged on the machine body, and the ink fountain, the anilox roller and the forme roller are all installed on the movable support. An adjusting motor is installed on the machine body, an adjusting lead screw is installed at the output end of the adjusting motor, a nut kit is installed on the side face of the movable support, a plurality of first guide rods are slidably connected to the lower end of the movable support, the two ends of each first guide rod are installed on the machine body, and a second guide rod is further arranged at the upper end of the movable support. After the prior art is improved, the transverse position of the forme roller can be adjusted to adapt to a printing scene needing transverse color register in the flexographic printing unit, and the forme roller is easy to disassemble and assemble, high in effect and convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of flexographic printing machines, in particular to an intermittent flexographic printing device. Background Art

[0002] Flexographic printing uses a flexible printing plate and transfers ink through an anilox roll. It is a type of relief printing process, abbreviated as flexography. The graphic part of the flexible printing plate protrudes. During printing, the anilox roll evenly coats a certain thickness of ink layer on the graphic part of the printing plate. Then, under the action of the pressure of the impression cylinder, the ink layer on the graphic part is transferred to the surface of the printing substrate to form clear graphics and texts.

[0003] For example, a Chinese patent document with the authorization number CN214239940U discloses a tool-free quick-separable flexographic printing mechanism, including a machine body. An printing plate is installed inside the machine body. An ink fountain is installed on one side of the machine body. A rubber roller is connected to the inner side surface of the ink fountain. A cross bar is connected to the bottom end of the ink fountain. A second cylinder is connected to the bottom end of the cross bar. A stepping motor is installed on the outer surface of the machine body. The output end of the stepping motor is connected to a driving shaft. A moving roller is also installed inside the machine body. A second gear is connected to the side surface of the moving roller. One end of the driving shaft is connected to a first gear. The first gear is meshed with the second gear. An anilox roll is arranged on the side of the printing plate. The anilox roll is adapted to the rubber roller. A first cylinder is connected to the bottom end of the printing plate. By connecting a first cylinder to the bottom end of the printing plate, a second cylinder to the bottom end of the ink fountain, and a third cylinder to the bottom end of the scraper, the three cylinders independently control the corresponding operation mechanisms to separate the flexographic printing mechanism, and the operation is simple. However, when used in a flexographic printing unit, the lateral position of the printing plate cannot be adjusted, and it cannot adapt to the printing scenario that requires lateral color registration. Moreover, the printing plate is directly installed on the machine body of the flexographic printing machine. When the printing plate is soiled and needs to be disassembled and replaced, the operation is cumbersome, time-consuming, laborious, and inefficient.

[0004] Therefore, it is necessary to improve the deficiencies of the above prior art. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide an intermittent flexographic printing device in view of the deficiencies of the above prior art, so as to solve the problems that in the prior art, when used in a flexographic printing unit, the lateral position of the printing plate cannot be adjusted, it cannot adapt to the printing scenario that requires lateral color registration, and the printing plate is directly installed on the machine body of the flexographic printing machine. When the printing plate is soiled and needs to be disassembled and replaced, the operation is cumbersome, time-consuming, laborious, and inefficient.

[0006] To achieve the above object, the utility model provides the following technical solution: An intermittent flexographic printing device, comprising a machine body, a fountain, an anilox roll and a printing plate roll are arranged on one side of the machine body, an ink transfer roll is installed in the fountain, a printing substrate roll installed on the machine body is arranged on the side of the printing plate roll away from the anilox roll, a driving mechanism for driving the anilox roll and the printing plate roll to rotate is arranged on one side of the anilox roll, a movable bracket is arranged on the machine body, the fountain, the anilox roll and the printing plate roll are all installed on the movable bracket, and an adjusting mechanism 14 capable of reciprocating the movable bracket along the axial direction of the printing plate roll is arranged between the movable bracket and the machine body.

[0007] With the above technical solution, when it is necessary to adjust the lateral position of the printing plate roll, the adjusting mechanism 14 drives the movable bracket to reciprocate along the axial direction of the printing plate roll, and the movable bracket drives the fountain, the ink transfer roll, the anilox roll, the printing plate roll, etc. installed on it to move together, so as to be able to adjust the lateral position of the printing plate roll to adapt to the printing scenario that requires lateral color registration in the flexographic printing unit.

[0008] The further setting of the above technical solution is: The adjusting mechanism 14 includes an adjusting motor installed on the machine body, an adjusting lead screw installed on the output end of the adjusting motor, and a nut kit installed on the side of the movable bracket. A plurality of first guide rods are slidably connected to the lower end of the movable bracket, and both ends of the first guide rods are installed on the machine body. A second guide rod with one end fixedly connected to the upper end of the movable bracket and the other end slidably connected to the machine body is also provided.

[0009] With the above technical solution, when it is necessary to adjust the lateral position of the printing plate roll, start the adjusting motor to drive the adjusting lead screw to rotate. The adjusting lead screw and the nut kit are in screw drive, and the nut kit moves along the adjusting lead screw, thereby driving the movable bracket to move, and further driving the fountain, the ink transfer roll, the anilox roll, the printing plate roll, etc. to move together, realizing the adjustment of the lateral position of the printing plate roll.

[0010] The further setting of the above technical solution is as follows: Fixed disks are fixedly connected to both ends of the plate cylinder. A convex ring is provided on the outer side surface of the fixed disk. A lever cylinder is installed on the movable bracket, and the movable end of the lever cylinder can abut against the inner side surface of the convex ring. A first rotating shaft rotatably connected to the movable bracket is provided below the fixed disk. First brackets and second brackets are sleeved on both sides below the fixed disk at both ends of the first rotating shaft. The upper end surfaces of the first bracket and the second bracket are arc-shaped and respectively fit and abut against the outer peripheral surface of the fixed disk. Limiting mechanisms for restricting the first bracket and the second bracket from deflecting away from the fixed disk are provided at one end of the first bracket and the second bracket away from the first rotating shaft and are installed on the movable bracket. One end of the first rotating shaft is fixedly connected to a first rotating rod, and the end of the first rotating rod away from the first rotating shaft is connected to a first cylinder installed on the movable bracket. Grooves with radially downward openings are further provided at both ends of the first rotating shaft. A top support member with one end that can extend into the groove is fixedly installed on the movable bracket.

[0011] With the above technical solution, when it is necessary to disassemble and replace the plate cylinder, by controlling the lever cylinder to make its movable end away from the inner side surface of the convex ring, the plate cylinder can be unlocked from the first bracket and the second bracket. During installation, after placing the plate cylinder on the support mechanism, the movable end of the lever cylinder is pressed against the convex ring on the outer side surface of the fixed disk again for limiting, so as to be relocked, and the plate cylinder is fixed on the movable bracket. Therefore, the disassembly and assembly process of the plate cylinder is simple in operation, high in efficiency and convenient in maintenance. When the machine stops, the lever cylinder can be controlled to release the locking limit in the vertical direction, and then by controlling the movable end of the first cylinder to extend, the first rotating rod is driven to drive the first rotating shaft to rotate. When the first rotating shaft rotates, it makes an eccentric upward movement from the inner side of the groove to the outer peripheral surface of the first rotating shaft together with the top support member, driving the first bracket, the second bracket and the plate cylinder as a whole to rise slightly, so that the plate cylinder is separated from the anilox roller and the impression roller, facilitating the maintenance, repair, replacement of consumables or paper threading operation of the equipment, etc. When starting the machine, control the first cylinder and the lever cylinder to operate in the reverse direction.

[0012] The further setting of the above technical solution is as follows: The limiting mechanism includes a limiting member installed on the movable bracket and an adjusting knob threadedly connected horizontally to the limiting member. A limiting chute is provided on one side of the limiting member close to the fixed disk. A sliding section surface matched with the limiting chute is provided at one end of the first bracket and the second bracket close to the limiting chute. One end of the adjusting knob close to the fixed disk can abut against the sliding section surface.

[0013] With the above technical solution, the first bracket and the second bracket can be limited and can also slide stably up and down through the limiting chute. The pressure between the plate cylinder and the anilox roller can be adjusted through the adjusting knob on one side of the first bracket. The pressure between the plate cylinder and the impression roller can be adjusted through the adjusting knob on one side of the second bracket.

[0014] The further setting of the above technical solution is as follows: The driving mechanism includes a first driving motor installed on the movable bracket, a first transmission gear and a second transmission gear connected to the output end of the first driving motor, and a cross-over gear installed on the movable bracket. One end of the anilox roller is provided with a third transmission gear in transmission connection with the first transmission gear, one end of the printing plate roller is provided with a fourth transmission gear, and one end of the cross-over gear is in transmission connection with the second transmission gear and the other end is in transmission connection with the fourth transmission gear.

[0015] With the above technical solution, during the printing process, the output shaft of the first driving motor drives the first transmission gear and the second transmission gear to rotate synchronously. The first transmission gear drives the third transmission gear and drives the anilox roller to rotate. The second transmission gear drives the fourth transmission gear through the cross-over gear and drives the printing plate roller to rotate.

[0016] The further setting of the above technical solution is as follows: Both ends of the bottom of the ink fountain are fixedly connected with third brackets. A second rotating shaft rotatably connected to the movable bracket is fixedly connected between the third brackets. One end of the second rotating shaft is fixedly connected with a second rotating rod. The end of the second rotating rod away from the second rotating shaft is connected with a second air cylinder installed on the movable bracket.

[0017] With the above technical solution, when stopping the machine, the second air cylinder can be controlled to extend to drive the second rotating rod and the second rotating shaft to rotate. The second rotating shaft drives the third brackets and the ink fountain to rotate. The ink fountain drives the ink transfer roller away from the anilox roller to stop ink transfer and prevent ink from condensing on the anilox roller.

[0018] The further setting of the above technical solution is as follows: A third rotating shaft is rotatably connected to the movable bracket. Scraping knife holders are fixedly connected to both ends of the third rotating shaft. Scraping knives are installed at the upper ends of the scraping knife holders. Pin holes are provided on both side surfaces of the scraping knife holders. A fourth air cylinder is installed on the movable bracket at positions corresponding to the pin holes. The movable end of the fourth air cylinder can be inserted into the pin holes. The scraping knives can be in contact with the anilox roller. Limiting guide rods are also provided on both side surfaces of the scraping knife holders. Limiting guide grooves matched with the limiting guide rods are provided on the movable bracket. A handle is also provided at the upper end of the scraping knife holder.

[0019] With the above technical solution, when the scraping knives need to be replaced and maintained, the movable end of the fourth air cylinder can be controlled to contract and disengage from the pin holes to no longer lock the scraping knife holders. Then, the scraping knife holders can be pulled outwards through the handle to rotate along the third rotating shaft, which is convenient for operation. After the scraping knives are installed, the reverse operation can be performed.

[0020] The above technical solution is further configured as follows: a first traction roller is also installed on the machine body, the first traction roller is transmission-connected to a second drive motor, a first guide roller and a first pressure roller are provided above the first traction roller, an ultraviolet dryer installed on the machine body is also provided on the side of the first traction roller away from the printing plate roller, an infrared dryer installed on the machine body is provided below the ultraviolet dryer, the bottom and sides of the infrared dryer are respectively connected to drawer slide rails installed on the machine body, and the infrared dryer is also connected to a fifth cylinder installed on the machine body.

[0021] By adopting the above technical solution, by setting up the UV dryer and the infrared dryer at the same time, the drying method can be flexibly selected according to the paper and different inks, which can adapt to more printing scenarios; when feeding paper before starting the machine, the fifth cylinder can be controlled to pull the infrared dryer along the drawer slide rail to retract into the machine body, making paper feeding more convenient. After feeding the paper, the fifth cylinder can be controlled to drive the infrared dryer to reset.

[0022] The above technical solution is further configured as follows: an electric push rod is installed at a position of the machine body between the printing roller and the first traction roller, and a photoelectric sensor is installed on the movable end of the electric push rod.

[0023] By adopting the above technical solution, the position of the photoelectric sensor can be controlled and adjusted by the electric push rod to monitor and identify the pattern information on the printed paper.

[0024] The above technical solution is further configured as follows: a third driving motor, a driving shaft and a driven wheel installed on the machine body are provided below the infrared dryer, the output shaft of the third driving motor is transmission-connected to the driving shaft, the driving shaft and the driven shaft are linked by a synchronous belt, a transmission block is connected to the synchronous belt, and the first paper storage roller and the second paper storage roller are rotatably connected to the transmission block; a fourth driving motor is also installed on the machine body, the output shaft of the fourth driving motor is transmission-connected to the second traction roller, a second pressure roller is provided above the second traction roller, and swinging members are rotatably connected at both ends of the second pressure roller, one end of the swinging member is hinged to the machine body, and the other end is connected to a sixth cylinder installed on the machine body, and a second guide roller and a third guide roller are also provided on both sides below the second traction roller.

[0025] By adopting the above technical solution, the third drive motor drives the active shaft and the driven shaft to rotate, so that the synchronous belt can drive the transmission block to move forward and backward, and can drive the first paper storage roller and the second paper storage roller to move forward and backward, thereby changing the stroke length of the printed paper, being able to store printed paper, facilitating the continuous printing operation, ensuring a stable supply of paper during the printing process, thereby improving production efficiency and printing quality; controlling the fourth drive motor to drive the second traction roller to pull the paper out; the sixth cylinder can control and adjust the lifting and lowering of the second pressure roller, which is convenient for adjusting the pressure and feeding paper during shutdown.

[0026] The beneficial effects achieved by the present utility model are as follows: It can adjust the lateral position of the printing plate roller to adapt to the printing scenarios that require lateral color registration in the flexographic printing unit, and the disassembly and assembly process of the printing plate roller is simple, highly efficient, and convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of an embodiment of the present utility model Figure 1 ;

[0028] Figure 2 is a schematic structural diagram of an embodiment of the present utility model Figure 2 ;

[0029] Figure 3 is a schematic cross-sectional view of an embodiment of the present utility model;

[0030] Figure 4 is a schematic structural diagram of the printing part in an embodiment of the present utility model;

[0031] Figure 5 is a schematic structural diagram of the adjusting mechanism 14 in an embodiment of the present utility model;

[0032] Figure 6 is a schematic structural diagram of the related structures for adjusting the lifting and locking of the printing plate roller in an embodiment of the present utility model;

[0033] Figure 7 is a schematic structural diagram of the related structures for adjusting the ink fountain and ink transfer roller in an embodiment of the present utility model;

[0034] Figure 8 is a schematic structural diagram of the cutting knife in an embodiment of the present utility model;

[0035] Figure 9 is a schematic structural diagram of the drying part in an embodiment of the present utility model;

[0036] Figure 10 is a schematic structural diagram of the related structures for paper storage and traction discharge in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0038] As Figures 1-5As shown in the figure, an intermittent flexographic printing device includes a machine body 1. On one side of the machine body 1, there are an ink fountain 2, an anilox roll 3, and a printing plate roll 4. A ink transfer roll 5 is installed in the ink fountain 2. On the side of the printing plate roll 4 away from the anilox roll 3, there is a printing substrate roll 6 installed on the machine body 1. On one side of the anilox roll 3, there is a driving mechanism 15 for driving the anilox roll 3 and the printing plate roll 4 to rotate. On the machine body 1, there is a movable bracket 11. The ink fountain 2, the anilox roll 3, and the printing plate roll 4 are all installed on the movable bracket 11. Between the movable bracket 11 and the machine body 1, there is an adjusting mechanism 14 that can make the movable bracket 11 reciprocate axially along the printing plate roll 4. The adjusting mechanism 14 includes an adjusting mechanism 141 installed on the machine body 1, an adjusting screw rod 142 installed at the output end of the adjusting mechanism 141, and a nut kit 143 installed on the side surface of the movable bracket 11. A plurality of first guide rods 144 are slidably connected to the lower end of the movable bracket 11, and both ends of the first guide rods 144 are installed on the machine body 1. At the upper end of the movable bracket 11, there is also a second guide rod 145 with one end fixedly connected to it and the other end slidably connected to the machine body 1. Among them, the adjusting mechanism 141 can also be replaced with a knob to be manually adjusted.

[0039] As Figure 6 As shown in the figure, fixed disks 41 are fixedly connected to both ends of the printing plate roll 4. On the outer side surface of the fixed disks 41, there are convex rings 411. A lever cylinder 8 is installed on the movable bracket 11. The movable end of the lever cylinder 8 can abut against the inner side surface of the convex ring 411. Below the fixed disk 41, there is a first rotating shaft 71 rotatably connected to the movable bracket 11. At both ends of the first rotating shaft 71 below the fixed disk 41, a first bracket 72 and a second bracket 73 are sleeved. The upper end surfaces of the first bracket 72 and the second bracket 73 are set to be arc-shaped and respectively fit and abut against the outer peripheral surface of the fixed disk 41. At one end of the first bracket 72 and the second bracket 73 away from the first rotating shaft 71, there is a limiting mechanism 70 installed on the movable bracket 11 for limiting the first bracket 72 and the second bracket 73 from deflecting away from the fixed disk 41. One end of the first rotating shaft 71 is fixedly connected to a first rotating rod 74. The end of the first rotating rod 74 away from the first rotating shaft 71 is connected to a first cylinder 75 installed on the movable bracket 11. At both ends of the first rotating shaft 71, there are also grooves 710 with radially downward openings. A top support 76 with one end that can extend into the groove 710 is fixedly installed on the movable bracket 11. The limiting mechanism 70 includes a limiting member 701 installed on the movable bracket 11 and an adjusting knob 702 threadedly connected horizontally to the limiting member 701. A limiting chute 703 is provided on the side of the limiting member 701 close to the fixed disk 41. At one end of the first bracket 72 and the second bracket 73 close to the limiting chute 703, there are sliding cut surfaces that cooperate with the limiting chute 703. The end of the adjusting knob 702 close to the fixed disk 41 can abut against the sliding cut surface.

[0040] As Figure 4As shown in the figure, the driving mechanism 15 includes a first driving motor 151 installed on the movable bracket 11, a first transmission gear 152 and a second transmission gear 153 connected to the output end of the first driving motor 151, and a cross-over gear 154 installed on the movable bracket 11. One end of the anilox roll 3 is provided with a third transmission gear 155 in transmission connection with the first transmission gear 152, one end of the printing plate cylinder 4 is provided with a fourth transmission gear 156, one end of the cross-over gear 154 is in transmission connection with the second transmission gear 153, and the other end is in transmission connection with the fourth transmission gear 156; the two ends of the impression cylinder 6 are respectively installed on the machine body 1 through the movable bracket 11 and the cross-over gear 154. During the position adjustment and movement of the movable bracket 11, the impression cylinder 6 does not move along with it, thus avoiding the impression cylinder 6 driving the printed matter to move together and affecting the color registration effect.

[0041] As Figure 7 shown in the figure, two ends of the bottom of the ink fountain 2 are fixedly connected with third brackets 21. A second rotating shaft 22 rotatably connected to the movable bracket 11 is fixedly connected between the third brackets 21. One end of the second rotating shaft 22 is fixedly connected with a second rotating rod 23, and the end of the second rotating rod 23 far from the second rotating shaft 22 is connected with a second air cylinder 24 installed on the movable bracket 11.

[0042] As Figure 8 shown in the figure, a third rotating shaft 91 is rotatably connected to the movable bracket 11. Two ends of the third rotating shaft 91 are fixedly connected with a doctor blade holder 92. A doctor blade 93 is installed at the upper end of the doctor blade holder 92. Pin holes 920 are provided on both side surfaces of the doctor blade holder 92. A fourth air cylinder 94 is installed on the movable bracket 11 at a position corresponding to the pin holes 920. The movable end of the fourth air cylinder 94 can be inserted into the pin holes 920, and the doctor blade 93 can be abutted against the anilox roll 3. A handle 95 is further provided at the upper end of the doctor blade holder 92.

[0043] As Figure 1 、 8 shown in the figure, a first traction roll 101 is further installed on the machine body 1. The first traction roll 101 is in transmission connection with a second driving motor 102. A first guide roll 103 and a first pressure roll 104 are provided above the first traction roll 101. An ultraviolet dryer 105 installed on the machine body 1 is further provided on the side of the first traction roll 101 far from the printing plate cylinder 4. An infrared dryer 106 installed on the machine body 1 is provided below the ultraviolet dryer 105; a drawer slide rail 107 installed on the machine body 1 is respectively connected to the bottom and side of the infrared dryer 106. The infrared dryer 106 is further connected with a fifth air cylinder 108 installed on the machine body 1.

[0044] As Figure 1 、 2 shown in the figure, an electric push rod 111 is installed at the position of the machine body 1 between the impression cylinder 6 and the first traction roll 101. A photoelectric sensor 112 is installed on the movable end of the electric push rod 111.

[0045] As Figure 1 , 10 shown, below the infrared dryer 106, there are a third drive motor 121, a driving shaft 122 and a driven shaft 123 mounted on the machine body 1. The output shaft of the third drive motor 121 is in transmission connection with the driving shaft 122. The driving shaft 122 and the driven shaft 123 are linked by a synchronous belt 124. A transmission block 125 is connected to the synchronous belt 124. A first paper storage roller 126 and a second paper storage roller 127 are rotatably connected to the transmission block 125. A fourth drive motor 131 is also mounted on the machine body 1. The output shaft of the fourth drive motor 131 is in transmission connection with a second traction roller 132. Above the second traction roller 132, there is a second pressure roller 133. Both ends of the second pressure roller 133 are rotatably connected to a swing member 134. One end of the swing member 134 is hinged to the machine body 1 and the other end is connected to a sixth cylinder 135 mounted on the machine body 1. On both sides below the second traction roller 132, there are also a second guide roller 136 and a third guide roller 137.

[0046] In the above embodiment, when it is necessary to adjust the lateral position of the printing plate roller 4, the adjustment mechanism 141 is started to drive the adjustment lead screw 142 to rotate. The adjustment lead screw 142 and the nut kit 143 are in screw transmission. The nut kit 143 moves along the adjustment lead screw 142, thereby driving the movable bracket 11 to move, and further driving the ink fountain 2, the ink transfer roller 5, the anilox roller 3, the printing plate roller 4, etc. to move together, realizing the adjustment of the lateral position of the printing plate roller 4 to adapt to the printing scenario that requires lateral color registration in the flexographic printing unit. When it is necessary to disassemble and replace the printing plate roller 4, the lever cylinder 8 is controlled to make its movable end away from the inner side of the convex ring 411, thereby realizing the unlocking of the printing plate roller 4 from the first bracket 72 and the second bracket 73. During installation, after the printing plate roller 4 is placed on the support mechanism, the movable end of the lever cylinder 8 is pressed against the convex ring 411 on the outer side of the fixed disk 41 for positioning, thereby re-locking and fixing the printing plate roller 4 on the movable bracket 11. Therefore, the disassembly and assembly process of the printing plate roller 4 is simple in operation, high in efficiency and convenient in maintenance.

Claims

1. An intermittent flexographic printing device, comprising a machine body, an ink fountain, an anilox roll and a printing plate roll are arranged on one side of the machine body, an ink transfer roll is installed in the ink fountain, a printing substrate roll installed on the machine body is arranged on the side of the printing plate roll away from the anilox roll, and a driving mechanism for driving the anilox roll and the printing plate roll to rotate is arranged on one side of the anilox roll, characterized in that: An adjustable bracket is provided on the machine body. The ink fountain, the anilox roll, and the printing plate roll are all installed on the adjustable bracket. An adjusting mechanism is provided between the adjustable bracket and the machine body, which can make the adjustable bracket reciprocate axially along the printing plate roll.

2. The intermittent flexographic printing device according to claim 1, wherein: The adjusting mechanism includes an adjusting motor installed on the machine body, an adjusting lead screw installed at the output end of the adjusting motor, and a nut kit installed on the side surface of the adjustable bracket. A plurality of first guide rods are slidably connected to the lower end of the adjustable bracket, and both ends of the first guide rods are installed on the machine body. A second guide rod is further provided at the upper end of the adjustable bracket, with one end fixedly connected thereto and the other end slidably connected to the machine body.

3. The intermittent flexographic printing device according to claim 2, wherein: Fixed disks are fixedly connected to both ends of the printing plate roll. A convex ring is provided on the outer side surface of the fixed disk. A lever cylinder is installed on the adjustable bracket, and the movable end of the lever cylinder can abut against the inner side surface of the convex ring. A first rotating shaft rotatably connected to the adjustable bracket is provided below the fixed disk. First brackets and second brackets are sleeved on both ends of the first rotating shaft below the two sides of the fixed disk. The upper end surfaces of the first bracket and the second bracket are set to be arc-shaped and respectively fit and abut against the outer circumferential surface of the fixed disk. Limiting mechanisms for restricting the first bracket and the second bracket from deflecting away from the fixed disk are provided at the ends of the first bracket and the second bracket far from the first rotating shaft and are installed on the adjustable bracket. One end of the first rotating shaft is fixedly connected to a first rotating rod, and the end of the first rotating rod far from the first rotating shaft is connected to a first cylinder installed on the adjustable bracket. Radially downward-opening grooves are further provided at both ends of the first rotating shaft, and a top support member with one end that can extend into the groove is fixedly installed on the adjustable bracket.

4. The intermittent flexographic printing device according to claim 3, characterized in that: The limiting mechanism includes a limiting member installed on the adjustable bracket and an adjusting knob threadedly connected horizontally to the limiting member. A limiting chute is provided on the side of the limiting member close to the fixed disk. Sliding sections that cooperate with the limiting chute are provided at the ends of the first bracket and the second bracket close to the limiting chute. The end of the adjusting knob close to the fixed disk can abut against the sliding section.

5. An intermittent flexographic printing device according to claim 4, characterized in that: The driving mechanism includes a first driving motor installed on the adjustable bracket, a first transmission gear, a second transmission gear connected to the output end of the first driving motor, and a cross-over gear installed on the adjustable bracket. A third transmission gear in transmission connection with the first transmission gear is provided at one end of the anilox roll. A fourth transmission gear is provided at one end of the printing plate roll. One end of the cross-over gear is in transmission connection with the second transmission gear, and the other end is in transmission connection with the fourth transmission gear.

6. The intermittent flexographic printing device according to claim 5, characterized in that: Third brackets are fixedly connected to both ends of the bottom of the ink fountain. A second rotating shaft rotatably connected to the adjustable bracket is fixedly connected between the third brackets. One end of the second rotating shaft is fixedly connected to a second rotating rod, and the end of the second rotating rod far from the second rotating shaft is connected to a second cylinder installed on the adjustable bracket.

7. An intermittent flexographic printing device according to claim 6, characterized in that: A third rotating shaft is rotatably connected to the movable support. Scraping knife holders are fixedly connected to both ends of the third rotating shaft. Scraping knives are installed at the upper ends of the scraping knife holders. Pin holes are provided on both side surfaces of the scraping knife holders. A fourth air cylinder is installed on the movable support at positions corresponding to the pin holes. The movable end of the fourth air cylinder can be inserted into the pin holes. The scraping knives can be in contact with the anilox roller. Limiting guide rods are also provided on both side surfaces of the scraping knife holders. Limiting guide grooves cooperating with the limiting guide rods are provided on the movable support. A handle is further provided at the upper end of the scraping knife holder.

8. An intermittent flexographic printing device according to any one of claims 1-7, characterized in that: A first traction roller is further installed on the machine body. The first traction roller is drivingly connected to a second driving motor. A first guide roller and a first pressing roller are provided above the first traction roller. An ultraviolet dryer installed on the machine body is further provided on the side of the first traction roller away from the printing plate roller. An infrared dryer installed on the machine body is provided below the ultraviolet dryer. Drawer slide rails installed on the machine body are respectively connected to the bottom and side surfaces of the infrared dryer. The infrared dryer is further connected to a fifth air cylinder installed on the machine body.

9. The intermittent flexographic printing device according to claim 8, characterized in that: An electric push rod is installed at the position of the machine body between the impression roller and the first traction roller. A photoelectric sensor is installed on the movable end of the electric push rod.

10. A kind of intermittent flexographic printing device according to claim 9, characterized in that: A third driving motor, a driving shaft and a driven wheel installed on the machine body are provided below the infrared dryer. The output shaft of the third driving motor is drivingly connected to the driving shaft. The driving shaft and the driven shaft are linked by a synchronous belt. A transmission block is connected to the synchronous belt. A first paper storage roller and a second paper storage roller are rotatably connected to the transmission block. A fourth driving motor is further installed on the machine body. The output shaft of the fourth driving motor is drivingly connected to a second traction roller. A second pressing roller is provided above the second traction roller. Swing members are rotatably connected to both ends of the second pressing roller. One end of the swing member is hinged to the machine body and the other end is connected to a sixth air cylinder installed on the machine body. Second guide rollers and third guide rollers are further provided on both sides below the second traction roller.

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