Automatic roll changing device of flexo printing machine

Abstract

The automatic roll changing device of the flexographic printing machine is applied to the technical field of roll changing of flexographic printing, the roll changing frame is arranged, automatic feeding and automatic discharging can be achieved through the roll changing frame, and multiple sets of material taking rods are arranged on the roll changing frame, so that automatic roll changing is achieved. The material taking rod can drive the material coil to move along with rotation of the coil changing frame so that the material coil can be taken out of an outlet of the feeding box and brought into a coil receiving groove in the coil changing frame, automatic feeding is achieved, and preparation is made for coil changing. The coil discharging piece is arranged, and an upper clamping plate and a lower clamping plate are driven by an electric telescopic rod in the coil discharging piece to move to clamp the taken material coil; when the material rolls are used up, the roll changing frame automatically starts the electric telescopic rod in the rotating process, the used material rolls are clamped, automatic discharging is achieved, the roll changing frame continues to rotate after discharging, the opening of the adjacent roll receiving groove above the roll discharging piece faces downwards along with rotation, and the spare material rolls in the roll discharging piece roll out of the roll receiving groove under the action of the gravity of the spare material rolls. And the roll falls into a mounting groove in the mounting table, so that automatic roll changing is realized.

Description

Technical Field

[0001] The present application relates to the technical field of flexographic printing roll changing, and in particular to an automatic roll changing device for a flexographic printing machine. Background Art

[0002] The structure of the flexographic printing machine includes the machine body, ink transfer system, paper pressing system, paper winding system and control system. The flexographic printing machine uses fluid ink with strong fluidity. The ink is transferred to the image and text part of the printing plate by the ink fountain rubber roller and the anilox transfer roller to make it inked. Then the pressing cylinder applies printing pressure to transfer the ink on the printing plate to the substrate. Finally, the printing process is completed through the drying surface. Since the flexographic printing mechanism is relatively simple, the equipment investment is lower than that of the offset printing machine or gravure printing machine of the same scale. Since the flexographic printing machine has a simple printing principle, clear structure and high working efficiency, it is widely used in the printing of packaging and decoration products.

[0003] In the flexographic printing process, roll materials are key consumables, such as paper and film. When a roll of material is used up, it is necessary to switch to a new roll to continue production. The traditional roll changing method relies on manual operation. When the roll material is used up, it is necessary to manually remove the used roll material and then install the new roll material before continuing printing. In addition, due to the large size of the roll material, it often requires two people to work together to lift the roll material for replacement and installation. This slow roll changing speed not only reduces the roll changing efficiency, but also greatly increases the downtime of the printing machine, thereby reducing printing efficiency. Manual roll changing may also lead to material waste, reduced printing quality and other problems.

[0004] To this end, we propose an automatic roll changing device for a flexographic printing press to solve the above problems, so as to achieve efficient and accurate roll changing operations, reduce downtime and improve production efficiency. Summary of the invention

[0005] In response to the problems existing in the prior art, the purpose of the present application is to realize automatic roll changing through automatic loading and automatic unloading, realize automatic loading by automatically taking materials during the unloading process, and realize the installation of spare rolls while unloading the rolls, thereby greatly improving the roll changing speed and efficiency while automatically changing the rolls. Compared with the prior art, an automatic roll changing device for a flexographic printing machine is provided.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0007] An automatic roll changing device for a flexographic printing press comprises a workbench and a material roll, wherein the material roll comprises a coil, a material roller and a roller shaft, wherein the coil is wound around the outer side of the middle part of the material roller, and the roller shaft is fixedly connected to both ends of the material roller, wherein a pair of support frames are fixedly connected to the workbench, a roll changing frame is arranged between the pair of support frames, and a plurality of groups of roll unloading members are arranged on the roll changing frame; The roll changing rack comprises a mounting shaft, a mounting plate, a roll receiving slot and a material taking rod; The mounting shaft is rotatably connected to the support frame, two mounting plates are provided, and the two mounting plates are symmetrically fixedly sleeved on the outside of the mounting shaft, the roll receiving groove is opened on the mounting plate, and the roll receiving groove is provided with multiple ones, and the material taking rod is fixedly connected to one side of the roll receiving groove.

[0008] Furthermore, one end of the material taking rod away from the mounting plate is arranged in a hook shape, and the inner side surface of the material taking rod is flush with the side wall of the coil receiving groove.

[0009] Furthermore, a servo motor is fixedly mounted on the workbench, and an output shaft of the servo motor is fixedly connected to one end of the mounting shaft.

[0010] Further, the roll unloading member is arranged between two adjacent material taking rods, and the roll unloading member includes an electric telescopic rod, a slide groove, a slide rod, a connecting rod, a connecting block, an upper clamping plate, a lower clamping plate, a control switch and an extrusion plate; The electric telescopic rod is fixedly connected to one of the mounting plates, the slide slot is opened on the other mounting plate, the slide rod is slidably connected to the slide slot, the connecting rod is fixedly connected between the slide rod and the output end of the electric telescopic rod, two connecting blocks are provided, and the two connecting blocks are respectively fixedly connected to the output end of the electric telescopic rod and the end of the slide rod away from the slide slot, the upper clamping plate and the lower clamping plate are respectively rotatably connected to the upper end and the lower end of the connecting block through a rotating shaft, a torsion spring is fixedly connected between the rotating shaft and the upper clamping plate and the lower clamping plate, the control switch is provided on the mounting plate, and the extrusion plate is fixedly connected to the support frame.

[0011] Furthermore, a decoiling plate is fixedly connected to the workbench, and an extrusion slope is provided on a side of the decoiling plate close to the material coil.

[0012] Furthermore, a coil box is arranged below the extrusion slope, the coil box is fixedly connected to the workbench, the bottom of the coil box is arranged obliquely, and the lower end of the coil box is arranged to be open.

[0013] Furthermore, a feeding box is fixedly connected to the workbench, the top of the feeding box is funnel-shaped, and the bottom of the feeding box is fixedly connected to a support platform. Both ends of the material roll are supported on the support platform, and the end of the support platform is fixedly connected to a limiting block, and the material of the limiting block is polyurethane.

[0014] Furthermore, it also includes a mounting platform, the mounting platform is provided with a mounting groove, a pressure sensor is arranged at the bottom of the mounting groove, the pressure sensor is connected to the servo motor through a controller, and a guide plate is fixedly connected to the mounting platform.

[0015] Compared with the prior art, the advantages of this application are: (1) By setting up a roll changing rack, the roll changing rack can realize automatic loading and unloading. The servo motor works, driving the mounting shaft and the mounting plate to rotate clockwise, thereby driving the material picking rod to rotate clockwise from bottom to top. When the material picking rod is in a horizontal position, the material picking rod contacts the roller shaft of the material roll, and then the material picking rod continues to rotate. The material picking rod can drive the material roll to move together, thereby taking the material roll out from the outlet of the loading box. The material picking rod continues to rotate and drives the material roll to continue to rise. Under the action of its own gravity, the material roll will roll along the side wall of the straight section of the material picking rod during the rising process until it rolls into the roll receiving slot, realizing automatic loading and preparing for roll changing.

[0016] (2) By setting the end of the material picking rod away from the mounting plate into a hook shape, the hook-shaped end of the material picking rod can automatically take out the material roll from the loading box during the rotation process, and the taken-out material roll can be smoothly rolled into the roll receiving slot through the guidance of the straight section of the material picking rod, thereby realizing automatic material picking.

[0017] (3) By arranging multiple groups of unloading parts on the roll changing rack, the unloading parts can remove the used material rolls. When the material rolls are used up, the servo motor drives the mounting shaft and the mounting plate to rotate clockwise. When the squeezing plate and the control switch are squeezed, the servo motor stops rotating, and the electric telescopic rod starts to extend, driving the two groups of upper clamps and lower clamps to move synchronously. The upper clamps and the lower clamps move to contact and squeeze the material rolls. At this time, under the action of the squeezing force, the upper clamps and the lower clamps rotate and open. When the material rolls enter the upper clamps and the lower clamps, the upper clamps and the lower clamps are reset under the elastic force of the torsion spring, thereby clamping the material rolls. Then the electric telescopic rod is reset, driving the used material rolls to leave the mounting table, realizing automatic unloading.

[0018] (4) By arranging a decoiling plate on the workbench, arranging an extrusion slope on the decoiling plate, and arranging a roll receiving box with an inclined bottom below the extrusion slope, after the upper clamping plate and the lower clamping plate clamp the used material roll and separate it from the mounting table, the servo motor continues to drive the mounting plate to rotate. At this time, the end of the material roll clamped by the upper clamping plate and the lower clamping plate contacts and is squeezed with the extrusion slope, so that during the rotation process, the used material roll separates from the upper clamping plate and the lower clamping plate, and falls into the roll receiving box below, and automatically slides out from the bottom of the roll receiving box. In this process, the adjacent roll receiving slot above the unloading member opens downward as it rotates, and the spare material roll inside it rolls out of the roll receiving slot under the action of its own gravity and falls into the mounting slot on the mounting table, thereby realizing automatic roll replacement.

[0019] (5) A loading box is provided, a support platform is provided at the bottom of the loading box, and a limit block is provided at the end of the support platform. A plurality of spare rolls are placed into the loading box from the top of the loading box. Under the action of the weight of the rolls themselves, the rolls will move toward the opening at the bottom of the loading box, and stay in the loading box under the interception action of the limit block, waiting to be taken out in turn.

[0020] (6) By setting the material of the limit block to polyurethane, the limit block made of polyurethane can, on the one hand, cushion the end of the material roll, and on the other hand, silence the noise generated by the collision, thereby optimizing the working environment.

[0021] (7) By setting a pressure sensor at the bottom of the installation groove, when the pressure received by the pressure sensor is lower than the threshold value, it means that the coil of material is running out. The pressure sensor transmits the detected signal to the processor, and the processor controls the servo motor to start through the controller, automatically triggering the roll changing operation.

[0022] (8) By setting a guide plate, the guide plate can guide the falling material roll so that it falls accurately into the installation groove.

[0023] (9) By simultaneously loading and installing spare rolls during the unloading process, automatic roll changing is achieved through automatic loading and unloading, making the roll changing operation faster and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the application in the un-discharging state; Figure 2 This is a schematic diagram of the overall structure of the present application in the unloading state; Figure 3 This is a schematic diagram of the roll changing rack structure of this application; Figure 4 For this application Figure 1 A magnified view of the local structure at center A; Figure 5 For this application Figure 2 A magnified view of the local structure at B in the middle; Figure 6 For this application Figure 2 A magnified view of the local structure at C in the middle; Figure 7 For this application Figure 2 Enlarged view of the local structure at point D in the middle.

[0025] Description of the numbers in the figure: 1. Workbench; 101. Support frame; 2. Material roll; 201. Coil; 202. Material roller; 203. Roller shaft; 3. Roll changing frame; 301. Mounting shaft; 302. Mounting plate; 303. Reel slot; 304. Material taking rod; 4. Reel unloading member; 401. Electric telescopic rod; 402. Slide slot; 403. Slide rod; 404. Connecting rod; 405. Connecting block; 406. Upper clamping plate; 407. Lower clamping plate; 408. Control switch; 409. Extrusion plate; 5. Servo motor; 6. Unwinding plate; 7. Extrusion slope; 8. Reel box; 9. Loading box; 10. Support table; 11. Limit block; 12. Mounting table; 13. Mounting slot; 14. Pressure sensor; 15. Guide plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. Example

[0027] The present invention provides an automatic roll changing device for a flexographic printing press, see Figure 1-7 , including a workbench 1 and a material roll 2, the material roll 2 includes a coil 201, a material roller 202 and a roller shaft 203, the coil 201 is wound around the outer middle part of the material roller 202, the roller shaft 203 is fixedly connected to both ends of the material roller 202, a pair of support frames 101 are fixedly connected to the workbench 1, a roll changing frame 3 is arranged between the pair of support frames 101, the roll changing frame 3 can realize automatic loading and unloading, and a plurality of groups of roll unloading members 4 are arranged on the roll changing frame 3, and the roll unloading members 4 are used to remove the used material roll 2.

[0028] The roll changing rack 3 includes a mounting shaft 301, a mounting plate 302, a roll receiving groove 303 and a material taking rod 304; the mounting shaft 301 is rotatably connected to the support frame 101, a servo motor 5 is fixedly mounted on the workbench 1, and the output shaft of the servo motor 5 is fixedly connected to one end of the mounting shaft 301. The mounting shaft 301 is driven to rotate by the servo motor 5, thereby driving the roll changing rack 3 and the material roll 2 thereon to rotate, and replacing the used material roll 2. Two mounting plates 302 are provided, and the two mounting plates 302 are symmetrically fixedly sleeved on the outer side of the mounting shaft 301. The roll receiving slot 303 is opened on the mounting plate 302, and there are multiple roll receiving slots 303. The material picking rod 304 is fixedly connected to one side of the roll receiving slot 303. The end of the material picking rod 304 away from the mounting plate 302 is set in a hook shape. The inner side of the material picking rod 304 is flush with the side wall of the roll receiving slot 303. The hook-shaped end of the material picking rod 304 can automatically take out the material roll 2 from the loading box 9 during the rotation process, and the straight section of the material picking rod 304 can guide the taken-out material roll 2 to roll smoothly into the roll receiving slot 303, thereby realizing automatic material picking.

[0029] Specifically, the servo motor 5 works, driving the mounting shaft 301 and the mounting plate 302 to rotate clockwise, thereby driving the material picking rod 304 to rotate clockwise from bottom to top. When the material picking rod 304 is in a horizontal position, the material picking rod 304 is in contact with the roller shaft 203 of the material roll 2. Then the material picking rod 304 continues to rotate, and the material picking rod 304 can drive the material roll 2 to move together, thereby taking the material roll 2 out from the outlet of the loading box 9. The material picking rod 304 continues to rotate, driving the material roll 2 to continue to rise. Under the action of its own gravity, the material roll 2 will roll along the side wall of the straight section of the material picking rod 304 during the rising process until it rolls into the roll receiving slot 303, thereby realizing automatic loading and preparing for roll changing.

[0030] The unloading member 4 is arranged between two adjacent material taking rods 304, and the unloading member 4 includes an electric telescopic rod 401, a slide groove 402, a slide rod 403, a connecting rod 404, a connecting block 405, an upper clamping plate 406, a lower clamping plate 407, a control switch 408 and an extrusion plate 409; the electric telescopic rod 401 is fixedly connected to one of the mounting plates 302, the slide groove 402 is opened on the other mounting plate 302, the slide rod 403 is slidably connected to the slide groove 402, and the connecting rod 404 is fixedly connected between the slide rod 403 and the electric telescopic rod. Two connecting blocks 405 are provided between the output ends of the telescopic rod 401. The two connecting blocks 405 are respectively fixedly connected to the output end of the electric telescopic rod 401 and the end of the sliding rod 403 away from the sliding groove 402. The upper clamping plate 406 and the lower clamping plate 407 are respectively rotatably connected to the upper end and the lower end of the connecting block 405 through a rotating shaft. A torsion spring is fixedly connected between the rotating shaft and the upper clamping plate 406 and the lower clamping plate 407. The control switch 408 is provided on the mounting plate 302. The extrusion plate 409 is fixedly connected to the support frame 101.

[0031] Specifically, when the material roll 2 is used up, the servo motor 5 drives the mounting shaft 301 and the mounting plate 302 to rotate clockwise. When the squeezing plate 409 is squeezed with the control switch 408, the servo motor 5 stops rotating, and the electric telescopic rod 401 starts to extend, driving the two groups of upper clamps 406 and lower clamps 407 to move synchronously. The upper clamps 406 and the lower clamps 407 move to contact and squeeze the material roll 2. At this time, under the action of the squeezing force, the upper clamps 406 and the lower clamps 407 rotate and open. When the material roll 2 enters the upper clamps 406 and the lower clamps 407, the upper clamps 406 and the lower clamps 407 are reset under the elastic force of the torsion spring, thereby clamping the material roll 2. Then the electric telescopic rod 401 is reset, driving the used material roll 2 to leave the mounting table 12, thereby realizing automatic unloading.

[0032] A decoiling plate 6 is fixedly connected to the workbench 1, and an extrusion slope 7 is provided on the side of the decoiling plate 6 close to the material roll 2. A reel box 8 is provided below the extrusion slope 7. The reel box 8 is fixedly connected to the workbench 1, and the bottom of the reel box 8 is inclined. The lower end of the reel box 8 is open. After the upper clamping plate 406 and the lower clamping plate 407 clamp the used material roll 2 and separate from the mounting table 12, the servo motor 5 continues to drive the mounting plate 302 to rotate.

[0033] A loading box 9 is fixedly connected to the workbench 1, the top of the loading box 9 is funnel-shaped, and a support platform 10 is fixedly connected to the bottom of the loading box 9. Both ends of the material roll 2 are supported on the support platform 10, and the ends of the support platform 10 are fixedly connected to a limiting block 11. The material of the limiting block 11 is polyurethane. The limiting block 11 made of polyurethane can buffer the end of the material roll 2 on the one hand, and can silence the noise generated by the collision on the other hand, thereby optimizing the working environment.

[0034] Specifically, a plurality of spare rolls 2 are placed into the loading box 9 from the top thereof. Under the action of the weight of the rolls 2 themselves, the rolls 2 will move toward the opening at the bottom of the loading box 9, and will stay in the loading box 9 under the interception action of the limit block 11, waiting to be taken out in turn.

[0035] It also includes a mounting platform 12 (the mounting platform 12 can be installed on the printing machine or on the workbench 1, and the mounting method can be selected according to the actual working environment). The mounting platform 12 is provided with a mounting groove 13, and a pressure sensor 14 is provided at the bottom of the mounting groove 13. The pressure sensor 14 is connected to the servo motor 5 through a controller. A guide plate 15 is fixedly connected to the mounting platform 12, and the guide plate 15 can guide the falling material roll 2 to accurately fall into the mounting groove 13.

[0036] Specifically, when the pressure received by the pressure sensor 14 is lower than the threshold, it means that the coil 201 of the material roll 2 is almost used up. The pressure sensor 14 transmits the detected signal to the processor, and the processor controls the servo motor 5 to start through the controller, automatically triggering the roll changing operation.

[0037] Working principle: put a plurality of spare rolls 2 into the loading box 9 from the top. Under the action of the weight of the rolls 2 themselves, the rolls 2 will move toward the opening at the bottom of the loading box 9, and stay in the loading box 9 under the interception of the limit block 11, waiting to be taken out in turn. When the pressure received by the pressure sensor 14 is lower than the threshold value, it means that the coil 201 of the material roll 2 is almost used up. The pressure sensor 14 transmits the detected signal to the processor, and the processor controls the servo motor 5 to start through the controller, automatically triggering the roll changing operation; The servo motor 5 works, driving the mounting shaft 301 and the mounting plate 302 to rotate clockwise. When the squeezing plate 409 is squeezed with the control switch 408, the servo motor 5 stops rotating, and the electric telescopic rod 401 starts to extend, driving the two sets of upper clamping plates 406 and lower clamping plates 407 to move synchronously. The upper clamping plates 406 and lower clamping plates 407 move to contact and squeeze the material roll 2. At this time, under the action of the squeezing force, the upper clamping plates 406 and lower clamping plates 407 rotate and open. When the material roll 2 enters the upper clamping plates 406 and lower clamping plates 407, the upper clamping plates 406 and lower clamping plates 407 are reset under the elastic force of the torsion spring, thereby clamping the material roll 2. Then the electric telescopic rod 401 is reset, driving the used material roll 2 to leave the mounting table 12, and realizing automatic unloading. The servo motor 5 continues to drive the mounting shaft 301 and the mounting plate 302 to rotate clockwise. At this time, the end of the material roll 2 clamped by the upper clamping plate 406 and the lower clamping plate 407 contacts and squeezes the extrusion slope 7, so that the used material roll 2 is separated from the upper clamping plate 406 and the lower clamping plate 407 during the rotation process, and falls into the roll receiving box 8 below, and automatically slides out from the bottom of the roll receiving box 8. In this process, the adjacent roll receiving slot 303 above the unloading member 4 opens downward as it rotates, and the spare material roll 2 inside it rolls out of the roll receiving slot 303 under the action of its own gravity and falls into the mounting slot 13 on the mounting table 12, realizing automatic roll change; At the same time, in this process, the mounting plate 302 rotates clockwise, driving the material picking rod 304 to rotate clockwise from bottom to top. When the material picking rod 304 is in a horizontal position, the material picking rod 304 contacts the roller shaft 203 of the material roll 2. Then the material picking rod 304 continues to rotate, and the material picking rod 304 can drive the material roll 2 to move together, so as to take the material roll 2 out of the outlet of the loading box 9. The material picking rod 304 continues to rotate to drive the material roll 2 to continue to rise. Under the action of its own gravity, the material roll 2 will roll along the side wall of the straight section of the material picking rod 304 during the rising process until it rolls into the roll receiving slot 303, realizing automatic loading and preparing for roll replacement. Therefore, the present application realizes the simultaneous loading and installation of the spare material roll 2 during the unloading process, and realizes automatic roll changing through automatic loading and automatic unloading, making the roll changing operation faster and more efficient.

[0038] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and its improved conception, which should be covered by the protection scope of the present application.

Claims

1. An automatic roll changing device for a flexographic printing press, comprising a workbench (1) and a material roll (2), wherein the material roll (2) comprises a coil (201), a material roller (202) and a roller shaft (203), wherein the coil (201) is wound around the outer side of the middle part of the material roller (202), and the roller shaft (203) is fixedly connected to both ends of the material roller (202), characterized in that: A pair of support frames (101) are fixedly connected to the workbench (1), a roll changing frame (3) is arranged between the pair of support frames (101), and a plurality of groups of roll unloading members (4) are arranged on the roll changing frame (3); The roll changing rack (3) comprises a mounting shaft (301), a mounting plate (302), a roll receiving groove (303) and a material taking rod (304); The mounting shaft (301) is rotatably connected to the support frame (101), two mounting plates (302) are provided, and the two mounting plates (302) are symmetrically fixedly sleeved on the outside of the mounting shaft (301), the roll receiving groove (303) is opened on the mounting plate (302), and the roll receiving groove (303) is provided with a plurality of grooves, and the material taking rod (304) is fixedly connected to one side of the roll receiving groove (303).

2. The automatic roll changing device for a flexographic printing press according to claim 1, characterized in that: One end of the material taking rod (304) away from the mounting plate (302) is arranged in a hook shape, and the inner side surface of the material taking rod (304) is flush with the side wall of the coil receiving groove (303).

3. The automatic roll changing device for a flexographic printing press according to claim 1, characterized in that: A servo motor (5) is fixedly mounted on the workbench (1), and an output shaft of the servo motor (5) is fixedly connected to one end of the mounting shaft (301).

4. The automatic roll changing device for a flexographic printing press according to claim 1, characterized in that: The roll unloading member (4) is arranged between two adjacent material taking rods (304), and the roll unloading member (4) comprises an electric telescopic rod (401), a slide groove (402), a slide rod (403), a connecting rod (404), a connecting block (405), an upper clamping plate (406), a lower clamping plate (407), a control switch (408) and an extrusion plate (409); The electric telescopic rod (401) is fixedly connected to one of the mounting plates (302); the slide groove (402) is provided on the other mounting plate (302); the slide rod (403) is slidably connected to the slide groove (402); the connecting rod (404) is fixedly connected between the slide rod (403) and the output end of the electric telescopic rod (401); two connecting blocks (405) are provided; the two connecting blocks (405) are respectively connected to the electric telescopic rod (401) and the connecting rod (404) is connected to the output end of ... ) is fixedly connected to an output end of the slide bar (403) away from the slide groove (402), the upper clamping plate (406) and the lower clamping plate (407) are respectively rotatably connected to the upper end and the lower end of the connecting block (405) via a rotating shaft, and a torsion spring is fixedly connected between the rotating shaft and the upper clamping plate (406) and the lower clamping plate (407), the control switch (408) is arranged on the mounting plate (302), and the extrusion plate (409) is fixedly connected to the support frame (101).

5. The automatic roll changing device for a flexographic printing press according to claim 1, characterized in that: A decoiling plate (6) is fixedly connected to the workbench (1), and an extrusion slope (7) is provided on a side of the decoiling plate (6) close to the material coil (2).

6. The automatic roll changing device for a flexographic printing press according to claim 5, characterized in that: A coil box (8) is arranged below the extrusion slope (7), the coil box (8) is fixedly connected to the workbench (1), the bottom of the coil box (8) is arranged to be inclined, and the lower end of the coil box (8) is arranged to be open.

7. The automatic roll changing device for a flexographic printing press according to claim 1, characterized in that: A loading box (9) is fixedly connected to the workbench (1), the top of the loading box (9) is funnel-shaped, the bottom of the loading box (9) is fixedly connected to a support platform (10), both ends of the material roll (2) are supported on the support platform (10), and the end of the support platform (10) is fixedly connected to a limit block (11), and the material of the limit block (11) is polyurethane.

8. The automatic roll changing device for a flexographic printing press according to claim 1, characterized in that: It also comprises a mounting platform (12), the mounting platform (12) being provided with a mounting groove (13), a pressure sensor (14) being arranged at the bottom of the mounting groove (13), the pressure sensor (14) being connected to a servo motor (5) via a controller, and a guide plate (15) being fixedly connected to the mounting platform (12).

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