A cutting device and a cutting method for adhesive labels

Abstract

The application relates to a cutting device and a cutting method for adhesive labels, which comprise a rack, a plurality of conveying rollers, a plurality of ring knives and a bearing roller, a rotating shaft is rotationally connected to the rack, the ring knives are coaxially sleeved on the rotating shaft, a slitting driving element for driving the rotating shaft to rotate is further arranged on the rack, the bearing roller is arranged below the ring knives, a plurality of accommodating grooves are coaxially arranged on the bearing roller; a cooling assembly for cooling the labels to be cut is further arranged on the rack, and the cooling assembly comprises a cooling bin, an air knife, an air compressor and a refrigeration module. The labels are cooled first, so that the temperature of hot melt adhesive on the labels is reduced, and then in the cutting process by using the ring knives, the hot melt adhesive is not easy to adhere to the ring knives, so that the hot melt adhesive is not easy to adhere to the ring knives, and when subsequent cutting is performed, the labels cannot be normally slitted due to the fact that the labels are adhered by the hot melt adhesive on the ring knives.

Description

Technical Field

[0001] This application relates to the technical field of label slitting machines, and in particular to a cutting device and cutting method for self-adhesive labels. Background Technology

[0002] During the production process of self-adhesive labels, continuous large rolls of self-adhesive labels need to be cut to form the final size. The current cutting method is usually to use a slitting knife to cut along the length of the label, so that the large roll of self-adhesive labels can be divided into multiple self-adhesive labels with smaller widths.

[0003] Because the pressure-sensitive adhesive on the surface of self-adhesive labels is sticky, during the cutting process, the adhesive may soften due to the heat generated by the pressure and friction of the blade and adhere to the surface of the cutter. In subsequent cutting processes, the adhesive on the cutter will stick the cutter to the self-adhesive label, thus affecting the normal cutting of the self-adhesive label by the cutter.

[0004] Therefore, a new technical solution is needed to address the above problems. Summary of the Invention

[0005] In order to prevent the adhesive on the label from adhering to the ring cutter when cutting the label, this application provides a cutting device and cutting method for self-adhesive labels.

[0006] This application provides a self-adhesive label cutting device, which adopts the following technical solution:

[0007] A self-adhesive label cutting device and cutting method includes a frame, a plurality of conveying rollers disposed on the frame for conveying labels, a plurality of ring cutters for cutting labels, and a carrying roller for carrying labels. The conveying rollers are rotatably connected to the frame, and a rotating shaft is rotatably connected to the frame. The ring cutters are coaxially sleeved on the rotating shaft and rotate synchronously with the rotating shaft. The frame is also provided with a cutting drive component for driving the rotating shaft to rotate. The carrying roller is disposed below the ring cutters, and a plurality of receiving grooves for the ring cutters to pass through are coaxially formed on the carrying roller.

[0008] The frame is also equipped with a cooling assembly for cooling down the labels to be cut. The cooling assembly includes a cooling chamber on the frame, an air knife in the cooling chamber, an air compressor for conveying air, and a refrigeration module. The air knife is set perpendicular to the conveying direction of the label, and the length of the air outlet of the air knife is greater than the width of the label to be cut. The air outlet of the air compressor is connected to the air knife, and the refrigeration module is set at the air outlet of the air compressor.

[0009] By adopting the technical scheme, the label is cooled first, so that the temperature of the hot melt adhesive on the label is reduced, and then in the cutting process by the ring cutter, the hot melt adhesive is not easy to adhere to the ring cutter, so that the hot melt adhesive is not easy to adhere to the ring cutter, and in subsequent cutting, the label is not easy to be adhered by the hot melt adhesive on the ring cutter, so that the label cannot be normally divided.

[0010] Optionally, the air outlet of the air knife is inclined towards the direction of the ring cutter, one end of the cooling bin close to the ring cutter is provided with a conveying pipe for the label to pass through, and the end of the conveying pipe away from the cooling bin is close to the ring cutter.

[0011] By adopting the technical scheme, the air knife blows cold air on the label at the same time, and the cold air can also move towards the ring cutter along the conveying pipe, so as to cool the cutting edge of the ring cutter and reduce the temperature generated by the cutting friction of the ring cutter.

[0012] Optionally, the rack is further provided with a heating assembly for restoring the room temperature of the label after slitting, the heating assembly comprises a plurality of air nozzles provided on the rack and an air pump for driving air flow, the air nozzles are connected to the air outlet of the air pump and are arranged towards the label, and a grid plate is further arranged on the rack and is arranged between the air nozzles and the label.

[0013] By adopting the technical scheme, after the label is cut, dry air with the same room temperature as the label is conveyed towards the label, the label is heated by the air, and the temperature of the label approaches the room temperature, so that the surface of the label will not produce liquid due to water vapor condensation.

[0014] Optionally, the rack is further provided with a plurality of glue removing assemblies for cleaning the ring cutter respectively, the glue removing assembly comprises two mounting members, a brush rotatably connected to the mounting member, a glue removing driving member for driving the brush to rotate, and a hot air member for preheating the ring cutter, the brushes are arranged on both sides above the ring cutter, and the rotation axes of the brushes are perpendicular to the rotation axis of the ring cutter and are horizontally arranged.

[0015] By adopting the technical scheme, after the ring cutter works for a period of time, the hot air member is used to heat the position where the glue is easy to adhere to the cutting edge of the ring cutter, and then the brush rotates to scrape off the glue adhered to the ring cutter.

[0016] Optionally, the rack is provided with a separation assembly for driving the brush to move vertically, the separation assembly comprises a separation seat slidingly arranged on the rack and a separation driving member for driving the separation seat to move reciprocally, the mounting members are all rotatably connected to the lower end of the separation seat, and the lower end of the separation seat is provided with a disassembly driving member for driving the mounting member to rotate.

[0017] By adopting the above technical scheme, when the brush does not need to remove the glue on the surface of the ring knife, the two brushes can be separated from the ring knife, so that the brush is not easily quickly worn by the ring knife.

[0018] Optionally, the mounting member is provided with a first connecting member and a second connecting member, the first connecting member and the second connecting member are coaxially arranged, the glue removing driving member is connected to the first connecting member and drives the first connecting member to rotate, the first connecting member and the second connecting member are provided with clamping grooves on the end surfaces close to each other, and the two ends of the brush are embedded in the clamping grooves, respectively.

[0019] By adopting the above technical scheme, after the brush is worn for a long time, the second connecting member is moved away from the first connecting member, so that the brush can be directly taken off, and the brush can be conveniently replaced.

[0020] Optionally, the rack is further provided with a cleaning assembly for cleaning the brush, the cleaning assembly comprises a plurality of cleaning tanks for containing solvents, a plurality of spray heads arranged on the side walls of the cleaning tanks, a water pump for driving liquid flow, and a water storage tank for storing liquid, a sewage tank is arranged below the rack for recycling waste liquid, the lower ends of the cleaning tanks are communicated with the sewage tank through pipelines, valves are arranged at the connection positions of the cleaning tanks and the pipelines, the brush can be moved into the cleaning tanks, the water outlets of the spray heads face the brushes in the cleaning tanks, balance pipes are arranged between adjacent cleaning tanks to communicate the adjacent cleaning tanks, and gaps are left between the upper ends of the balance pipes and the top surfaces of the cleaning tanks.

[0021] By adopting the above technical scheme, after the brush is worn for a long time, the second connecting member is moved away from the first connecting member, so that the brush can be directly taken off, and the brush can be conveniently replaced.

[0022] Optionally, the upper ends of the cleaning tanks are rotatably connected with two cover plates capable of closing the openings of the cleaning tanks, the cover plates are respectively provided with second elastic members for keeping the cover plates horizontal, the cover plates are all provided with accommodation grooves for accommodating the mounting members, the accommodation grooves penetrate the side walls of the adjacent cover plates close to each other, and the mounting members can be arranged in the accommodation grooves.

[0023] By adopting the above technical scheme, during the soaking and rotating of the brush, the upper end openings of the cleaning tanks are closed by the cover plates, so that the liquid is not easy to splash out of the cleaning tanks.

[0024] A cutting method of adhesive label, characterized in that it comprises the following steps:

[0025] S1, cooling the label to be cut, reducing eight degrees Celsius compared to room temperature;

[0026] S2, cutting the label with a ring cutter, and in the cutting process, cold air is transported towards the ring cutter and the ring cutter is cooled;

[0027] S3, transporting dry air with the same temperature as room temperature towards the cut label, so that the temperature of the label rises to the same temperature as room temperature.

[0028] By adopting the above technical scheme, the label is cooled before cutting, thereby reducing the adhesion of the glue, so that the glue is not easy to adhere to the surface of the ring cutter when the ring cutter cuts the label.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. The label is cooled first, so that the temperature of the hot melt adhesive on the label is reduced, and then in the process of cutting with a ring cutter, the hot melt adhesive is not easy to adhere to the ring cutter, so that the hot melt adhesive is not easy to adhere to the ring cutter, and in the subsequent cutting, the label is not easy to be adhered by the hot melt adhesive on the ring cutter, so that the label cannot be normally cut.

[0031] 2. After the label is cut, dry air with the same temperature as room temperature is transported towards the label, and the label is heated by air, so that the temperature of the label approaches room temperature, so that the surface of the label will not produce liquid due to water vapor condensation. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic diagram of an embodiment of the present application;

[0033] Figure 2 is a schematic diagram of an embodiment of the present application for showing the installation position of the air knife;

[0034] Figure 3 is a schematic diagram of an embodiment of the present application for showing the installation position of the brush;

[0035] Figure 4 is a schematic diagram of an embodiment of the present application for showing the structure of the separation assembly;

[0036] Figure 5 is a schematic diagram of an embodiment of the present application for showing the structure of the separation assembly; Figure 4 is an enlarged view of part A of

[0037] In the diagram, 1. Frame; 12. Ring cutter; 13. Carrying roller; 131. Receiving groove; 14. Rotating shaft; 15. Slitting drive component; 2. Cooling assembly; 21. Cooling chamber; 22. Air knife; 23. Air compressor; 24. Refrigeration module; 25. Conveying pipe; 3. Heating assembly; 31. Air nozzle; 32. Air pump; 33. Mesh plate; 4. Adhesive removal assembly; 41. Mounting component; 411. Mounting groove; 42. Brush; 43. Adhesive removal drive component; 4 4. Hot air component; 45. First connecting component; 451. Snap-fit ​​groove; 46. Second connecting component; 47. Rotating block; 48. First elastic component; 5. Separation assembly; 51. Separation seat; 52. Separation drive component; 53. Disassembly drive component; 6. Cleaning assembly; 61. Cleaning tank; 62. Nozzle; 63. Water pump; 64. Water storage tank; 65. Balance pipe; 66. Wastewater tank; 67. Cover plate; 671. Clearance groove; 68. Second elastic component. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the accompanying drawings.

[0039] This application discloses a self-adhesive label cutting device, such as... Figure 1 As shown, the system includes a frame 1, several conveyor rollers mounted on the frame 1 for conveying labels, several ring cutters 12 for slitting labels, and a carrier roller 13 for carrying labels. The conveyor rollers are rotatably connected to the frame 1, and the labels are wound around the conveyor rollers and conveyed along the conveying direction of the conveyor rollers. A rotating shaft 14 is horizontally rotatably connected to the frame 1, and the rotating shaft 14 is arranged parallel to the conveyor rollers. A slitting drive component 15 for driving the rotating shaft 14 is also installed on the frame 1. In this embodiment, the slitting drive component 15 is a servo motor, and the output end of the slitting drive component 15 is connected to the rotating shaft 14 through a coupling. The ring cutters 12 are coaxially sleeved on the rotating shaft 14, and the ring cutters 12 are arranged along the length direction of the rotating shaft 14. The ring cutters 12 are fixed to the rotating shaft 14 with screws, so that the rotating shaft 14 can drive the ring cutters 12 to rotate synchronously during the rotation of the rotating shaft 14. The carrying roller 13 is rotatably connected to the frame 1 and is positioned below the ring cutter 12. Several receiving grooves 131 are coaxially formed on the carrying roller 13, arranged along its length. The label can abut against the top of the carrying roller 13, and the blade of the ring cutter 12 can be embedded in the receiving grooves 131. As the label passes between the carrying roller 13 and the rotating shaft 14, the ring cutter 12 rotates, thereby cutting the label and slitting it into strips.

[0040] like Figure 2 and Figure 3As shown, the frame 1 is also equipped with a cooling assembly 2 for cooling the labels to be cut. The cooling assembly 2 includes a cooling chamber 21 installed on the frame 1, an air knife 22 installed in the cooling chamber 21, an air compressor 23 for supplying air, and a refrigeration module 24 for cooling. The cooling chamber 21 is hollow, and both ends of the cooling chamber 21 perpendicular to the label conveying direction have material ports communicating with its inner cavity. The labels pass through the material ports and thus pass through the cooling chamber 21. The air knife 22 is installed in the cooling chamber 21, and the air outlet of the air knife 22 faces upward towards the label tape and is inclined towards the ring knife 12. The air compressor 23 is installed below the frame 1, and the air outlet of the air compressor 23 is connected to the refrigeration module 24. In this embodiment, the refrigeration module 24 is a water-cooled compressed air dryer. The air outlet of the refrigeration module 24 is connected to the air inlet of the air knife 22, thereby cooling the labels by spraying compressed cold air towards them. The temperature of the compressed air sprayed toward the label is about eight degrees below room temperature, but the overall temperature of the compressed air is not lower than ten degrees Celsius. This lowers the overall temperature of the self-adhesive label, so that during the subsequent cutting process using the ring cutter 12, the overall temperature of the self-adhesive label is less likely to rise due to the ring cutter 12, making it less likely for adhesive to stick to the ring cutter 12.

[0041] A horizontally arranged conveying pipe 25 is also installed at one end of the cooling chamber 21 near the ring cutter 12. The vertical cross-section of the conveying roller is rectangular. One end of the conveying pipe 25 is connected to the material outlet for label output on the cooling chamber 21, and the other end of the conveying pipe 25 is located near the ring cutter 12, so that the cold air in the cooling chamber 21 can spread toward the ring cutter 12, thereby cooling the ring cutter 12 and reducing the frictional heat generated by the ring cutter 12 during long-term cutting.

[0042] like Figure 1 As shown, since the overall temperature of the label is still below room temperature after cutting, directly winding the label will cause the cold label to condense upon contact with moisture in the environment, affecting its storage. Therefore, the frame 1 is also equipped with a heating component 3 to heat the slit labels. The heating component 3 is located on the side of the ring cutter 12 away from the cooling component 2. The heating component 3 includes several air nozzles 31 mounted on the frame 1 and an air pump 32 for driving air to flow toward the air nozzles 31. An air guide pipe is fixedly mounted on the frame 1. The air guide pipe is perpendicular to the direction of label movement and is located above and below the label. The air nozzles 31 are respectively mounted on the air guide pipe and connected to the air guide pipe, with the air outlets of the air nozzles 31 facing the label. Air pump 32 is installed on frame 1. The air outlet of air pump 32 is connected to air guide pipe, so as to deliver air towards air nozzle 31, so that air nozzle 31 blows air towards label, so that air flows over the label surface, heating the label and drying the label surface quickly.

[0043] In order to prevent the label from shaking due to too much wind when the air nozzle 31 blows towards the label, two grid plates 33 are installed on the frame 1 and arranged between the air nozzle 31 and the label, so that the airflow flowing towards the label is dispersed, thereby reducing the impact of the wind directly on the label.

[0044] As shown in Figure 3 and Figure 4 After the ring cutter 12 is used for a long time, some glue will still adhere to the surface of the ring cutter 12. Therefore, a plurality of glue removing assemblies 4 for cleaning the ring cutter 12 are arranged above the ring cutter 12 on the frame 1, so that the glue on the blade of the ring cutter 12 when the ring cutter 12 rotates to the upper position can be removed. The glue removing assembly 4 includes two mounting members 41, a brush 42 rotatably connected to the mounting member 41, a glue removing driving member 43 for driving the brush 42 to rotate, and a hot air member 44 for preheating the ring cutter 12. The mounting member 41 is arranged in a rectangular shape, and the lower end of the mounting member 41 is provided with a mounting groove 411 for mounting the brush 42, and the brush 42 is rotatably connected to the mounting groove 411. The brush 42 driving member is a micro motor in this embodiment, which is mounted on the inner wall of the mounting groove 411 and close to the upper end of the mounting member 41. The first connecting member 45 and the second connecting member 46 are respectively arranged on the two mutually distant inner walls of the mounting groove 411, the first connecting member 45 passes through the mounting member 41 and is connected to the mounting member 41 through a bearing, so that the first connecting member 45 can rotate relative to the mounting member 41. The output end of the brush 42 driving member is connected to the end of the first connecting member 45 outside the mounting member 41 through a belt, so as to drive the first connecting member 45 to rotate. The two ends of the brush 42 are respectively connected to the first connecting member 45 and the second connecting member 46, so that the first connecting member 45 can drive the brush 42 to rotate. The two brushes 42 are respectively arranged at the two ends of the ring cutter 12, and the brush 42 can contact the blade of the ring cutter 12, and the position of the brush 42 contacting the blade is rotated towards the direction away from the axis of the ring cutter 12, so that the glue on the blade is scraped off. The hot air member 44 is a hot air blower in this embodiment, which is mounted on the frame 1 and the air outlet of the hot air member 44 faces the blade of the ring cutter 12, so that after the blade of the ring cutter 12 is heated by the hot air member 44, the blade moves towards the brush 42, and the softened glue on the blade is scraped off by the brush 42.

[0045] The first connecting piece 45 and the second connecting piece 46 are provided with clamping grooves 451 on the end faces close to each other, the cross section of the clamping grooves 451 is a regular hexagon, both ends of the brush 42 are provided with clamping blocks capable of cooperating with the clamping grooves 451, the clamping blocks are arranged in the clamping grooves 451 so that the first connecting piece 45, the brush 42 and the second connecting piece 46 can rotate synchronously. The rotating block 47 is rotatably connected to the mounting piece 41 through a bearing, the second connecting piece 46 penetrates the rotating block 47 and is in sliding cooperation with the rotating block 47, so that the second connecting piece 46 can be close to or away from the first connecting piece 45. The first elastic piece 48 is coaxially arranged on the second connecting piece 46, one end of the first elastic piece 48 abuts against the second connecting piece 46, and the other end of the first elastic piece 48 abuts against the rotating block 47, so that the brush 42 and the second connecting piece 46 are kept in the clamped state. The anti-disengagement block is coaxially arranged on the end of the second connecting piece 46 away from the clamping groove 451, and can abut against the rotating block 47 to prevent the second connecting piece 46 from disengaging from the rotating block 47. The brush 42 is detachably connected to the mounting piece 41, so that the brush 42 can be conveniently replaced when the glue on the brush 42 increases or the brush 42 is worn out.

[0046] The rack 1 is also provided with a separation assembly 5 for driving the brush 42 to move vertically, the separation assembly 5 comprises a separation seat 51 vertically slidingly arranged on the rack 1 and a separation driving piece 52 for driving the separation seat 51 to move, the separation seat 51 is arranged above the mounting piece 41, the separation driving piece 52 is a cylinder in this embodiment, the separation driving piece 52 is arranged on the rack 1, and the driving end of the separation driving piece 52 is fixed to the upper end of the separation seat 51. The upper ends of the mounting pieces 41 are rotatably connected to the separation seat 51, and the rotation axes of the mounting pieces 41 are horizontal and perpendicular to the axis of the rotating shaft 14. The lower end of the separation seat 51 is provided with a plurality of dismounting driving pieces 53, which are cylinders in this embodiment, the cylinder bodies of the dismounting driving pieces 53 are rotatably connected to the separation seat 51, and the driving ends of the dismounting driving pieces 53 are rotatably connected to the mounting pieces 41 respectively. When the brush 42 needs to be dismounted, the mounting pieces 41 are first rotated to separate the brush 42 from the ring cutter 12, and then the separation seat 51 drives the brush 42 to move upward to move away from the ring cutter 12, so that the brush 42 is not easy to contact the ring cutter 12 when being replaced, and the occurrence of safety accidents is reduced.

[0047] As Figure 4 and Figure 5As shown, the rack 1 is further provided with a cleaning assembly 6 for temporarily cleaning the brush 42. The cleaning assembly 6 includes a plurality of cleaning grooves 61 mounted on the rack 1, a plurality of spray heads 62 mounted on the inner wall of the cleaning grooves 61, a water pump 63 for driving liquid to flow towards the spray heads 62, and a water storage groove 64 for storing liquid. The cleaning grooves 61 are respectively arranged between adjacent glue removing assemblies 4, and the cleaning grooves 61 contain a solvent for dissolving glue. In this embodiment, the solvent is medical alcohol with a concentration of 75%. The water storage groove 64 is arranged on the rack 1, and the water storage groove 64 contains water. The water pump 63 is mounted in the water storage groove 64, and the water outlet of the water pump 63 is connected to the spray heads 62 through a hose. The spray heads 62 are mounted in the cleaning grooves 61, and the liquid sprayed by the spray heads 62 can wash the brush 42 moving into the cleaning grooves 61. A balance pipe 65 is arranged between adjacent cleaning grooves 61, the balance pipe 65 is in communication with the inner cavity of the cleaning grooves 61, and the upper end of the balance pipe 65 is spaced apart from the upper end surface of the cleaning grooves 61. In this way, when alcohol is poured into the cleaning groove 61 at the edge of the rack 1, the alcohol can flow along the balance pipe 65 to all the cleaning grooves 61. A sewage groove 66 is arranged below the rack 1, and a pipe for discharging waste liquid towards the sewage groove 66 is arranged on the outermost cleaning groove 61. Valves are arranged at the connection between the pipe and the cleaning grooves 61. In this embodiment, the valves are electromagnetic valves, and the discharge of liquid in the cleaning grooves 61 is controlled by the electromagnetic valves.

[0048] Since alcohol is easy to volatilize, and splashing of liquid also occurs when the brush 42 is cleaned in the cleaning grooves 61, two cover plates 67 capable of closing the openings of the cleaning grooves 61 are rotatably connected to the upper end openings of the cleaning grooves 61. The two cover plates 67 are respectively arranged close to adjacent glue removing assemblies 4. Second elastic elements 68 for keeping the cover plates 67 horizontal are arranged on the cover plates 67. In this embodiment, the second elastic elements 68 are torsional springs. One end of each second elastic element 68 abuts against the cleaning groove 61, and the other end of the second elastic element 68 abuts against the cover plate 67. A clearance groove 671 is formed in the upper end surface of each cover plate 67, and the clearance groove 671 penetrates the side wall of the adjacent cover plate 67. The installation member 41 is arranged in the clearance groove 671, and the brush 42 can still be located in the cleaning groove 61 when the two cover plates 67 are kept horizontal.

[0049] The principle of the embodiment is that the label passes through the cooling bin 21, the label is cooled by the low-temperature air blown by the air knife 22, then the label contacts the ring cutter 12 and is cut by the ring cutter 12, the cut label continues to move, the air nozzle 31 of the temperature increasing assembly 3 blows dry air with the same temperature as the room temperature to the label, so that the temperature of the label returns to the room temperature. After the ring cutter 12 is used for a period of time, the brush 42 moves to contact the blade of the ring cutter 12, the air heater works to warm the blade of the ring cutter 12, the brush 42 rotates to remove the adhesive adhered to the ring cutter 12. Then the mounting piece 41 rotates to be vertical, is inserted into the cleaning groove 61, alcohol is poured into the cleaning groove 61, the brush 42 is soaked in the cleaning groove 61 and rotates for half an hour, the alcohol is discharged, the nozzle 62 sprays liquid to the brush 42 for flushing, and the liquid is discharged after flushing.

[0050] A cutting method of adhesive label, comprising the following steps:

[0051] S1, cooling the label to be cut, reducing eight degrees Celsius compared with the room temperature;

[0052] S2, cutting the label by the ring cutter 12, and sending the cold air to the ring cutter 12 and cooling the ring cutter 12 during the cutting;

[0053] S3, sending the dry air with the same temperature as the room temperature to the cut label, so that the temperature of the label is increased to the same temperature as the room temperature.

[0054] The embodiments of the specific embodiment are the preferred embodiments of the application, but do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A cutting apparatus for adhesive labels, characterized by: The application relates to a label cutting device, which comprises a rack (1), a plurality of conveying rollers arranged on the rack for conveying labels, a plurality of ring knives (12) for cutting the labels and a bearing roller (13) for bearing the labels, the conveying rollers are rotationally connected to the rack (1), a rotating shaft (14) is rotationally connected to the rack (1), the ring knives (12) are coaxially sleeved on the rotating shaft (14) and synchronously rotate with the rotating shaft (14), a cutting driving element (15) for driving the rotating shaft (14) to rotate is further arranged on the rack (1), the bearing roller (13) is arranged below the ring knives (12), a plurality of accommodating grooves (131) for passing through the ring knives (12) are coaxially arranged on the bearing roller (13); The rack (1) is further provided with a cooling assembly (2) for cooling the labels to be cut, the cooling assembly (2) comprises a cooling bin (21) arranged on the rack (1), an air knife (22) arranged in the cooling bin (21), an air compressor (23) for conveying air and a refrigeration module (24), the air knife (22) is arranged perpendicularly to the conveying direction of the labels, the length of an air outlet of the air knife (22) is greater than the width of the labels to be cut, the air outlet of the air compressor (23) is connected with the air knife (22), and the refrigeration module (24) is arranged at the air outlet of the air compressor (23); The rack (1) is further provided with a plurality of groups of glue removing assemblies (4) for cleaning the ring knives (12) respectively, the glue removing assembly (4) comprises two groups of mounting elements (41), a brush (42) rotationally connected to the mounting element (41), a glue removing driving element (43) for driving the brush (42) to rotate and a hot air element (44) for preheating the ring knives (12), the brushes (42) are arranged on both sides above the ring knives (12) respectively, and the rotating axes of the brushes (42) are perpendicular to the rotating axes of the ring knives (12) and are horizontally arranged. The rack (1) is provided with a separation assembly (5) for driving the vertical movement of the brush (42), the separation assembly (5) comprises a separation seat (51) slidingly arranged on the rack (1) and a separation driving member (52) for driving the reciprocating movement of the separation seat (51), the mounting member (41) is rotationally connected to the lower end of the separation seat (51), and the lower end of the separation seat (51) is provided with a disassembly driving member (53) for driving the rotation of the mounting member (41); The rack (1) is also provided with a cleaning assembly (6) for cleaning the brush (42), the cleaning assembly (6) comprises a plurality of cleaning tanks (61) for containing solvent, a plurality of spray heads (62) arranged on the side wall of the cleaning tank (61), a water pump (63) for driving liquid flow and a water storage tank (64) for storing liquid, a sewage tank (66) is arranged below the rack (1) for recycling waste liquid, the lower end of the cleaning tank (61) is communicated with the sewage tank (66) through a pipeline, and a valve is arranged at the connection between the cleaning tank (61) and the pipeline, the brush (42) can move into the cleaning tank (61), the water outlet of the spray head (62) faces the brush (42) in the cleaning tank (61), and a balance pipe (65) is arranged between adjacent cleaning tanks (61) to communicate them, and the upper end of the balance pipe (65) is spaced from the top surface of the cleaning tank (61) by a gap; Two cover plates (67) are rotationally connected at the upper end opening of the cleaning tank (61) and can close the opening, the cover plate (67) is respectively provided with a second elastic member (68) for keeping it horizontal, and a clearance slot (671) for placing the mounting member (41) is formed in the cover plate (67), the clearance slot (671) penetrates the side walls of the adjacent cover plates (67) and approaches each other, and the mounting member (41) can be arranged in the clearance slot (671).

2. The cutting device of the self-adhesive label according to claim 1, characterized in that: The air outlet of the air knife (22) is inclined towards the direction of the ring knife (12), one end of the cooling bin (21) close to the ring knife (12) is provided with a conveying pipe (25) for the label to pass through, and the end of the conveying pipe (25) away from the cooling bin (21) is close to the ring knife (12). ​ 3. The cutting device of the adhesive label according to claim 1, wherein: The rack (1) is also provided with a temperature rising assembly (3) for recovering the room temperature of the label after slitting, the temperature rising assembly (3) comprises a plurality of air nozzles (31) arranged on the rack (1) and an air pump (32) for driving air flow, the air nozzle (31) is connected to the air outlet of the air pump (32) and the air nozzle (31) is arranged towards the label, and the rack (1) is also provided with a grid plate (33), the grid plate (33) is arranged between the air nozzle (31) and the label.

4. The cutting device of the adhesive label according to claim 1, wherein: The mounting piece (41) is provided with a first connecting piece (45) and a second connecting piece (46), the first connecting piece (45) and the second connecting piece (46) are coaxially arranged, the glue removing driving piece (43) is connected to the first connecting piece (45) and drives the first connecting piece (45) to rotate, the first connecting piece (45) and the second connecting piece (46) are provided with clamping grooves (451) on the end faces close to each other, both ends of the brush (42) are respectively embedded in the clamping grooves (451), the mounting piece (41) is rotatably connected with a rotating block (47), the second connecting piece (46) is arranged in the rotating block (47) and is in sliding cooperation with the rotating block (47), and the second connecting piece (46) is provided with a first elastic piece (48) for pushing the second connecting piece (46) to abut against the brush (42).

5. A method for cutting the adhesive label using the cutting device for the adhesive label according to claim 1, characterized in that: The method comprises the following steps: S1, cooling the label to be cut, which is eight degrees Celsius lower than room temperature; S2, cutting the label with a ring cutter (12), and in the cutting process, cold air is transported towards the ring cutter (12) and cools the ring cutter (12); S3, transporting dry air with the same temperature as room temperature towards the cut label, so that the temperature of the label is raised to the same temperature as room temperature.

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