Device and method for label mimeograph cutting

Abstract

The invention discloses equipment and a method for label mimeograph cutting, and relates to the technical field of label printing and processing equipment. The device comprises a feeding mechanism, a mimeograph mechanism and a cutting mechanism. The feeding mechanism comprises an unwinding roller, a tension adjusting assembly and a guide roller set. A printing material roll is arranged on the unwinding roller; the tension adjusting assembly comprises a telescopic mechanism, the telescopic mechanism is rotationally connected with a tensioning roller abutting against a printing base material, the telescopic mechanism is provided with a force sensor for detecting the tensioning degree, the mimeograph mechanism is arranged on the downstream side of the feeding mechanism, the mimeograph mechanism comprises a printing plate roller and a servo motor for driving the printing plate roller, and the mimeograph mechanism is provided with a drying assembly. The drying assembly comprises a heating pipe and a fan, the cutting mechanism is arranged on the downstream side of the mimeographing mechanism, a conveying belt is arranged on a discharging port of the cutting mechanism, a counting sensor is arranged on the conveying belt, and a material collecting box is arranged at the tail end of the conveying belt. And high-efficiency and high-adaptability integrated operation of label production is realized.

Description

Technical Field

[0001] This invention relates to the field of label printing and processing equipment technology, specifically to a device and method for label printing and cutting. Background Technology

[0002] Labels serve as information carriers for goods and services. Their production process typically includes core steps such as printing, drying, cutting, and collecting materials. They are widely used in supermarket retail and logistics, as well as in various fields such as food and beverages, daily chemicals, cosmetics, electronics and home appliances, pharmaceuticals, daily necessities, industrial-related products, safety and anti-counterfeiting products, and environmental protection products.

[0003] In automated production lines for label manufacturing, existing label printing and cutting equipment typically uses mechanical gripper structures to position the printing material rolls on the unwinding rollers. This structure has significant drawbacks: the mechanical grippers have fixed extension strokes and clamping ranges, resulting in poor adaptability to printing material rolls of different inner diameters and widths, failing to meet diverse production needs. Furthermore, the uneven distribution of clamping force from the mechanical grippers can easily lead to skewness after the printing material rolls are installed, causing subsequent issues such as misalignment of printed patterns and deviations in cutting dimensions, thus affecting the label production pass rate.

[0004] Therefore, existing technologies need to be improved. Summary of the Invention

[0005] To address the problems existing in existing label printing and cutting equipment, this invention provides a device and method for label printing and cutting. By optimizing the fixing structure of the unwinding mechanism and improving the ink supply and recycling system of the printing mechanism, it achieves high-efficiency and highly adaptable integrated operation of label production.

[0006] This invention is achieved through the following technical solution:

[0007] In a first aspect, the present invention provides a device for label printing and cutting, comprising a feeding mechanism, a printing mechanism, and a cutting mechanism.

[0008] The feeding mechanism includes an unwinding roller, a tension adjusting component, and a guide roller assembly. The printing material roll is disposed on the unwinding roller. The tension adjusting component includes a telescopic mechanism rotatably connected to a tensioning roller that abuts against the printing substrate. The telescopic mechanism is equipped with a force sensor to detect the tension level. After passing the tensioning roller, the printing substrate enters the guide roller assembly.

[0009] The printing mechanism is located downstream of the feeding mechanism. The printing mechanism includes a printing roller and a servo motor that drives the printing roller. The printing mechanism also includes a drying assembly, which includes a heating element and a fan. The fan blows air onto the printing surface of the printing substrate.

[0010] The cutting mechanism is located downstream of the printing mechanism. The cutting mechanism is configured as a fiber laser. A conveyor belt is provided at the outlet of the cutting mechanism. A counting sensor is provided on the conveyor belt. A receiving box is provided at the end of the conveyor belt.

[0011] Furthermore, in this invention, the unwinding roller is provided with an oil chamber inside, a piston is provided in the oil chamber, the piston is connected to a thrust mechanism, a through hole is provided on the side of the unwinding roller, and a clamping cylinder is movably and sealed in the through hole, the outer end of the clamping cylinder is closed and the inner end is connected to the oil chamber.

[0012] Furthermore, in this invention, the inner wall of the unwinding roller is provided with a reinforcing sleeve aligned with the through hole, and the inner end of the clamping cylinder is provided with a limiting flange. When the limiting flange abuts against the end of the reinforcing sleeve, the clamping cylinder protrudes outward to its limit position.

[0013] Furthermore, in this invention, the outer end of the aforementioned clamping cylinder is provided with a second limiting flange, the outer wall of the unwinding roller is provided with a groove, and when the second limiting flange abuts against the bottom of the groove, the clamping cylinder retracts inward to its limit position, and the outer wall of the second limiting flange is provided with supporting rubber.

[0014] Furthermore, in this invention, the above-mentioned printing mechanism further includes an ink plate and a doctor blade. The doctor blade is disposed on the top of the printing plate roller, the ink plate is disposed on the side of the printing plate roller, and the ink plate is located behind the doctor blade. The ink plate is provided with an ink guiding slope, and the side wall of the printing plate roller and the ink guiding slope form an ink collection area. An inkjet nozzle is provided to replenish ink to the ink guiding slope.

[0015] Furthermore, in this invention, the above-mentioned printing mechanism is also provided with an ink collection groove, which is located below the ink plate.

[0016] Furthermore, in this invention, the bottom of the ink plate is provided with an inverted V-groove, one inclined surface of the inverted V-groove is aligned with the printing roller, and both inclined surfaces of the inverted V-groove are located directly above the ink collection groove.

[0017] After the ink flows down the outer surface of the printing roller, the printing roller rotates counterclockwise, and the ink is scraped off the left slope of the inverted V groove. The ink then flows into the ink collection groove along the right slope of the inverted V groove.

[0018] Furthermore, in this invention, baffles are provided on both sides of the ink plate, and the baffles are used to prevent ink from overflowing from the side of the ink plate.

[0019] Furthermore, in this invention, the focused spot diameter of the fiber laser described above is no higher than 0.1 mm.

[0020] Secondly, the present invention also provides a method for label printing and cutting, which includes the aforementioned equipment for label printing and cutting.

[0021] Step 1: Place the printing material roll on the unwinding roller, and push the piston through the thrust mechanism to make the oil in the oil chamber push the pressing cylinder outward to position the printing material roll coaxially; start the feeding drive component, and after the tension of the tension roller is adjusted, the printing substrate is guided and transported to the printing mechanism by the guide roller group.

[0022] Step 2: The servo motor drives the printing plate roller to rotate counterclockwise. The ink nozzle replenishes ink to the ink guide slope. The ink collects in the ink collection area and adheres to the pattern area of ​​the printing plate roller. The doctor blade scrapes off the excess ink on the surface of the printing plate roller. The printing plate roller contacts the printing substrate to complete the printing process. The ink scraped off by the inverted V-shaped groove at the bottom of the ink plate flows into the ink collection tank for recycling.

[0023] Step 3: Drying process. The printed substrate after ink printing is conveyed to the bottom of the drying unit. The heating tube heats the air, and the fan blows the hot air onto the printing surface of the substrate to complete the ink drying.

[0024] Step 4: Laser cutting. The dried printing substrate is conveyed to the cutting mechanism, where a fiber laser cuts the label outline of the printing substrate.

[0025] Step 5: Collection and counting. The cut labels are conveyed by a conveyor belt, and the number of labels is counted by a counting sensor. Finally, the labels fall into the collection box to complete the collection.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0027] 1. The structure of hydraulically driven clamping cylinders replaces the traditional mechanical grippers. Multiple clamping cylinders are evenly distributed around the unwinding roller, which can achieve coaxial positioning of the printing roll and avoid roll skewing. At the same time, the extension and retraction stroke of the clamping cylinders can be adjusted by the hydraulic pressure to adapt to printing rolls with different inner diameters and specifications, thus improving the versatility of the equipment.

[0028] 2. An ink-guiding slope is set to form an ink collection area to ensure sufficient ink in the pattern area of ​​the printing roller; the doctor blade effectively removes excess ink to avoid blurring of the pattern; the inverted V-shaped groove works in conjunction with the ink collection groove to recover residual ink, reduce ink waste, and also prevent ink from contaminating the printing substrate pulled out of the printing roll.

[0029] 3. The tension adjustment component monitors the substrate tension in real time through a force sensor and dynamically adjusts the position of the tension roller to ensure that the substrate tension remains constant during the conveying process, avoiding substrate stretching or wrinkling, and further ensuring printing and cutting quality. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of the device for label printing and cutting according to the present invention;

[0032] Figure 2 This is a schematic diagram of the internal structure of the unwinding roller of the present invention;

[0033] Figure 3 for Figure 2 Enlarged diagram of point A in the diagram;

[0034] Figure 4 for Figure 3 A schematic diagram of the outward protrusion of the clamping cylinder;

[0035] Figure 5 This is a schematic diagram of the printing mechanism of the present invention.

[0036] The attached diagram shows the markings and corresponding component names: 1-Feeding mechanism, 101-Unwinding roller, 1011-Oil chamber, 1012-Through hole, 1013-Reinforcing sleeve, 1014-Slot, 102-Guide roller assembly, 2-Printing mechanism, 201-Printing plate roller, 202-Ink plate, 2021-Ink guiding slope, 2022-Inverted V-shaped groove, 203-Scraper blade, 3-Cutting mechanism, 4-Conveyor belt, 401-Receiving box, 5-Tension adjustment assembly, 501-Telescopic mechanism, 502-Tension roller, 6-Drying assembly, 601-Heating tube, 602-Fan, 7-Printing material roll, 8-Piston, 9-Pressure cylinder, 901-Limiting flange one, 902-Limiting flange two, 10-Ink collection area, 11-Ink collection tank, 12-Thrust mechanism. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for explanation only and are not intended to limit the invention. The following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0038] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Example 1

[0040] This embodiment 1 provides a device for label printing and cutting, such as... Figures 1-5 As shown, it includes a feeding mechanism 1, an ink printing mechanism 2, and a cutting mechanism 3. Each mechanism is fixedly installed by a frame and arranged sequentially along the conveying direction of the printing substrate to form a continuous automated production line.

[0041] Combination Figure 1 As shown, the feeding mechanism 1 is the core component for achieving a stable supply of printing substrate, mainly including the unwinding roller 101, the tension adjustment assembly 5, and the guide roller group 102, with the specific structure as follows:

[0042] Combination Figure 1 and Figure 2 As shown, the unwinding roller 101 adopts a hollow cylindrical structure, and a columnar oil chamber 1011 is machined inside it. The oil chamber 1011 extends along the axial direction of the unwinding roller 101 and is filled with hydraulic oil. One end of the unwinding roller 101 is closed, and the other end is sealed by an end cover. The end cover has a hole for the push rod of the thrust mechanism 12 to pass through.

[0043] Combination Figure 1 and Figure 2 As shown, piston 8 adopts an annular structure and slides and seals with the inner wall of oil chamber 1011. A sealing ring is provided on the outer circumferential surface of piston 8 to ensure the sealing of oil chamber 1011. One side of piston 8 is fixedly connected to the movable end (i.e. push rod) of thrust mechanism 12. Thrust mechanism 12 is a hydraulic cylinder. The fixed end of the hydraulic cylinder is fixed to the frame or the ground through a bracket.

[0044] Furthermore, in combination Figure 2 and Figure 3As shown, the clamping cylinder 9 adopts a cylindrical structure and is evenly arranged along the circumference of the unwinding roller 101. Each clamping cylinder 9 corresponds to a through hole 1012. The inner wall of the through hole 1012 is in sliding sealing fit with the outer circumferential surface of the clamping cylinder 9. The inner end of the clamping cylinder 9 is provided with a limiting flange 1 901 and the outer end is provided with a limiting flange 2 902. The diameter of the limiting flange 1 901 is larger than the diameter of the through hole 1012, and the diameter of the limiting flange 2 902 is larger than the diameter of the through hole 1012.

[0045] Combination Figure 3 As shown, the reinforcing sleeve 1013 adopts a cylindrical sleeve structure and is fixedly installed on the inner wall of the unwinding roller 101, coaxially aligned with the through hole 1012. The length of the reinforcing sleeve 1013 is consistent with the wall thickness of the unwinding roller 101, used to enhance the structural strength at the through hole 1012 and prevent the unwinding roller 101 from deforming when the clamping cylinder 9 extends or retracts. It should be noted that the reinforcing sleeve 1013 and the unwinding roller 101 are integrally formed.

[0046] It should be noted that, in combination Figure 3 and Figure 4 As shown, the slot 1014 is provided on the outer side of the unwinding roller 101, and the size and shape of the slot 1014 are adapted to the limiting flange 902. The outer wall of the limiting flange 902 is provided with supporting rubber to increase friction.

[0047] In this embodiment 1, combined with Figure 1 As shown, the tension adjustment assembly 5 includes a telescopic mechanism 501 and a tension roller 502. The telescopic mechanism 501 is a cylinder, with its fixed end connected to the frame and its movable end fixedly connected to the bearing seat of the tension roller 502. The outer circumferential surface of the tension roller 502 is provided with a rubber anti-slip layer, which fits tightly against the printing substrate. A tension sensor is installed on the telescopic mechanism 501 to detect the tension of the tension roller 502 on the substrate.

[0048] The guide roller group 102 consists of two guide rollers arranged in parallel. The outer circumference of the guide rollers is smooth and is used to guide and level the printing substrate after tension adjustment, so as to ensure that the printing substrate is conveyed to the printing mechanism 2 along the preset direction.

[0049] When the printing material roll 7 needs to be installed, first control the thrust mechanism 12 to retract, driving the piston 8 to move away from the closed end of the unwinding roller 101. The oil pressure in the oil chamber 1011 decreases, and the clamping cylinder 9 retracts inward until the limiting flange 902 abuts against the bottom of the slot 1014. At this time, the outer end of the clamping cylinder 9 does not exceed the circumference of the center hole of the unwinding roller 101, which facilitates the installation of the printing material roll 7. After the printing material roll 7 is installed on the unwinding roller 101, control the push rod of the thrust mechanism 12 to extend, pushing the piston 8 to move towards the closed end of the oil chamber 1011, increasing the oil pressure in the oil chamber 1011. The pressure oil pushes each clamping cylinder 9 to extend outward synchronously until the outer end of the clamping cylinder 9 is tightly abutted against the inner wall of the printing material roll 7. Since multiple clamping cylinders 9 are evenly distributed along the circumference, the coaxial positioning of the printing material roll 7 can be achieved, avoiding the roll from being skewed.

[0050] Combination Figure 1 and Figure 5 As shown, in this embodiment 1, the printing mechanism 2 mainly includes a printing roller 201, a servo motor, an ink plate 202, a doctor blade 203, a drying assembly 6, and an ink collection tank 11. The specific structural composition is as follows:

[0051] The printing roller 201 adopts a cylindrical structure. The surface of the upper printing roller 201 is engraved with a preset label pattern. Both ends of the printing roller 201 are mounted on the frame through bearing seats. One end is connected to the output shaft of the servo motor through a coupling. The servo motor is a high-precision servo motor used to drive the printing roller 201 to rotate at a uniform speed. The rotation speed can be adjusted according to the feeding speed to ensure that the printing pattern and the substrate are conveyed synchronously.

[0052] The doctor blade 203 is located on top of the printing roller 201. The blade of the doctor blade 203 abuts against the surface of the printing roller 201. Both ends of the doctor blade 203 are mounted on the frame through an adjusting bracket. The adjusting bracket is equipped with adjusting bolts to adjust the pressure between the doctor blade 203 and the printing roller 201, ensuring that excess ink is scraped off without damaging the surface of the printing roller 201.

[0053] The ink plate 202 is fixedly installed on the frame and located on the rear side of the printing plate roller 201 (right side in this embodiment 1). The side of the ink plate 202 facing the printing plate roller 201 is processed with an ink guiding slope 2021. The ink guiding slope 2021 gradually slopes downward from right to left, and a wedge-shaped ink collection area 10 is formed between the ink guiding slope 2021 and the surface of the printing plate roller 201.

[0054] Furthermore, the bottom of the ink plate 202 is machined with an inverted V-shaped groove 2022, the left slope of the inverted V-shaped groove 2022 is aligned with the surface of the printing roller 201, and the right slope is inclined downwards; baffles are fixedly installed on both sides of the ink plate 202, the height of the baffles is higher than the height of the ink guiding slope 2021, and is used to prevent ink from overflowing from the side.

[0055] The inkjet nozzle is fixedly installed above the ink plate 202, and its jetting direction is aligned with the ink guide slope 2021. The inkjet nozzle is connected to the ink supply system through pipelines, and the ink jetting volume can be adjusted according to the printing speed and ink consumption to ensure that there is always sufficient ink in the ink collection area 10.

[0056] The ink collection tank 11 adopts a rectangular tank structure and is fixedly installed below the ink plate 202. The length of the ink collection tank 11 is greater than the length of the ink plate 202, and the width is greater than the width of the inverted V-shaped groove 2022. It is used to collect residual ink flowing down from the inverted V-shaped groove 2022. The bottom of the ink collection tank 11 is provided with an oil outlet, which is connected to the ink recovery and treatment system through a pipeline. The recovered ink can be reused for printing after being filtered and purified.

[0057] Combination Figure 5 As shown, the drying assembly 6 includes a heating tube 601 and a fan 602. The heating tube 601 is an electric heating tube, and multiple heating tubes are evenly arranged along the width of the printing substrate and installed inside the heating hood on the frame. The fan 602 is installed on the top of the heating hood, and its air outlet faces the printing surface of the printing substrate. The air heated by the heating tube 601 is blown onto the printing surface by the fan 602 to dry the ink.

[0058] During printing, a servo motor drives the upper printing roller 201 to rotate counterclockwise at a constant speed, while another servo motor drives the lower printing roller 201 to rotate clockwise at a constant speed. At the same time, the inkjet nozzle sprays ink onto the ink guide slope 2021. The ink flows into the ink collection area 10 along the ink guide slope 2021. Since the ink collection area 10 has a wedge-shaped structure, the ink is evenly adhered to the pattern area on the surface of the printing roller 201. When the printing roller 201 rotates to contact the conveyed printing substrate, the ink in the pattern area is transferred to the surface of the substrate, completing the printing of the label pattern.

[0059] During the rotation of the printing roller 201, the doctor blade 203 remains in contact with the surface of the printing roller 201, scraping away excess ink in non-pattern areas to prevent excess ink from transferring to the substrate surface and causing the pattern to become blurred. A small portion of the ink flows downwards. Due to the counterclockwise rotation of the printing roller 201, when it flows to the inverted V-shaped groove 2022 at the bottom of the ink plate 202, it is scraped off by the left inclined surface. The scraped ink slides down the right inclined surface into the ink collection tank 11, realizing the recycling and reuse of ink. The baffles on both sides of the ink plate 202 effectively prevent ink from overflowing from the sides, ensuring cleanliness.

[0060] The printed substrate continues to be conveyed forward and enters the drying assembly 6. The heating tube 601 is energized to heat the air, and the fan 602 blows the hot air toward the printed surface of the substrate. The hot air comes into full contact with the printed surface, quickly evaporating the solvent in the ink and causing the ink to solidify on the substrate surface, thus completing the drying process and preventing ink from sticking together during subsequent cutting.

[0061] Combination Figure 1 As shown, the cutting mechanism 3 uses a fiber laser, which is mounted on an adjustment bracket on the frame. The adjustment bracket can adjust the up and down and left and right positions of the fiber laser to ensure that the focused spot is aligned with the cutting path of the label outline. The diameter of the focused spot of the fiber laser is set to 0.08mm, and the cutting accuracy can reach ±0.05mm, which meets the cutting requirements of fine labels. The fiber laser is connected to the control system and can automatically adjust the cutting path according to the preset label outline parameters.

[0062] The conveyor belt 4 is made of high-temperature resistant and wear-resistant polyurethane and is installed below the discharge port of the cutting mechanism 3. The conveying speed of the conveyor belt 4 is synchronized with the conveying speed of the substrate. A counting sensor, which is a photoelectric sensor, is installed above the conveyor belt 4. Its detection head is aligned with the conveying surface of the conveyor belt 4 to detect the number of tags that have passed and to feed the counting signal back to the control system. The receiving box 401 has a rectangular box structure and is placed below the end of the conveyor belt 4.

[0063] Example 2

[0064] This embodiment 2 provides a method for label printing and cutting, using the label printing and cutting equipment from embodiment 1, and specifically includes the following steps:

[0065] Turn on the main power supply of the equipment, and set the printing speed, cutting parameters, counting threshold, etc. through the control system; adjust the position of the guide roller group 102 to ensure that the substrate conveying path is smooth; adjust the contact pressure between the doctor blade 203 and the printing plate roller 201 to ensure that excess ink can be effectively scraped off; adjust the position of the fiber laser to ensure that the focused spot is aligned with the cutting path.

[0066] The printing material roll 7 is placed on the unwinding roller 101. The thrust mechanism 12 is extended and pushed to push the piston 8 to increase the oil pressure in the oil chamber 1011. This drives each clamping cylinder 9 to extend outward synchronously and press against the inner wall of the printing material roll 7 to achieve coaxial positioning. The free end of the printing substrate is passed through the tension roller 502 and the guide roller group 102 in sequence until it contacts the printing plate roller 201 of the printing mechanism 2.

[0067] The feeding drive unit is started, and the substrate begins to be conveyed. The tension sensor of the tension adjustment component 5 detects the tension of the substrate in real time. When the tension deviates from the set value, the control system controls the telescopic mechanism 501 to extend and retract, and adjusts the position of the tension roller 502 to maintain the constant tension of the substrate.

[0068] Start the servo motor and inkjet nozzle, and rotate the upper printing roller 201 counterclockwise. The inkjet nozzle replenishes ink to the ink guide slope 2021. The ink adheres to the pattern area of ​​the printing roller 201 and completes printing after contacting the substrate. The doctor blade 203 scrapes off the excess ink, and the flowing ink is recovered to the ink collection tank 11 through the inverted V-shaped groove 2022.

[0069] After printing, the substrate enters the drying assembly 6, where heating tube 601 heats the air and fan 602 blows hot air to dry the ink. The drying temperature is controlled at 60-80℃ to ensure that the ink is completely cured.

[0070] The dried substrate is conveyed to the cutting mechanism 3, where a fiber laser cuts the label outline along a preset path to form a finished label.

[0071] Finished product labels are conveyed by conveyor belt 4, the number is counted by counting sensor, and finally fall into receiving box 401 for collection; when the count reaches the set threshold, the equipment issues a prompt signal, and the staff replaces receiving box 401.

[0072] This invention effectively solves the problems of poor adaptability of unwinding and positioning, easy skew of material rolls, unstable printing quality, and low cutting accuracy in existing equipment. It realizes high-precision, high-efficiency, and high-adaptability integrated operation of label production, and has significant practical value and promotion prospects.

[0073] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for label printing and cutting, characterized in that, It includes a feeding mechanism (1), a printing mechanism (2), and a cutting mechanism (3). The feeding mechanism (1) includes an unwinding roller (101), a tension adjusting component (5), and a guide roller group (102); the printing material roll (7) is disposed on the unwinding roller (101); the tension adjusting component (5) includes a telescopic mechanism (501), which is rotatably connected to a tensioning roller (502) that abuts against the printing substrate; the telescopic mechanism (501) is provided with a force sensor for detecting the tension; the printing substrate enters the guide roller group (102) after passing through the tensioning roller (502). The printing mechanism (2) is located downstream of the feeding mechanism (1). The printing mechanism (2) includes a printing roller (201) and a servo motor that drives the printing roller (201). The printing mechanism (2) is equipped with a drying assembly (6). The drying assembly (6) includes a heating tube (601) and a fan (602). The fan (602) blows air onto the printing surface of the printing substrate. The cutting mechanism (3) is located downstream of the printing mechanism (2). The cutting mechanism (3) is configured as a fiber laser. A conveyor belt (4) is provided at the outlet of the cutting mechanism (3). A counting sensor is provided on the conveyor belt (4). A receiving box (401) is provided at the end of the conveyor belt (4).

2. The device for label printing and cutting according to claim 1, characterized in that, The unwinding roller (101) has an oil chamber (1011) inside, and a piston (8) is provided inside the oil chamber (1011). The piston (8) is connected to a thrust mechanism (12). The side of the unwinding roller (101) has a through hole (1012). A clamping cylinder (9) is movably and sealed inside the through hole (1012). The outer end of the clamping cylinder (9) is closed and the inner end is connected to the oil chamber (1011).

3. The device for label printing and cutting according to claim 2, characterized in that, The inner wall of the unwinding roller (101) is provided with a reinforcing sleeve (1013) aligned with the through hole (1012). The inner end of the clamping cylinder (9) is provided with a limiting flange (901). When the limiting flange (901) abuts against the end of the reinforcing sleeve (1013), the clamping cylinder (9) protrudes outward to the limit position.

4. The device for label printing and cutting according to claim 3, characterized in that, The outer end of the clamping cylinder (9) is provided with a limiting flange two (902), and the outer wall of the unwinding roller (101) is provided with a groove (1014). When the limiting flange two (902) abuts against the bottom of the groove (1014), the clamping cylinder (9) retracts inward to the limit position. The outer wall of the limiting flange two (902) is provided with supporting rubber.

5. The device for label printing and cutting according to claim 1, characterized in that, The printing mechanism (2) further includes an ink plate (202) and a doctor blade (203). The doctor blade (203) is disposed on the top of the printing roller (201). The ink plate (202) is disposed on the side of the printing roller (201) and is located behind the doctor blade (203). The ink plate (202) is provided with an ink guiding slope (2021). The side wall of the printing roller (201) and the ink guiding slope (2021) form an ink collection area (10). An inkjet nozzle is provided to replenish ink to the ink guiding slope (2021).

6. The device for label printing and cutting according to claim 5, characterized in that, The printing mechanism (2) is also provided with an ink collection trough (11), which is located below the ink plate (202).

7. The device for label printing and cutting according to claim 6, characterized in that, The bottom of the ink plate (202) is provided with an inverted V-groove (2022), one inclined surface of the inverted V-groove (2022) is aligned with the printing roller (201), and both inclined surfaces of the inverted V-groove (2022) are located directly above the ink collection groove (11). After the ink flows down the outer surface of the printing roller (201), the ink is scraped off the printing roller (201) by the left inclined surface of the inverted V groove (2022) due to the counterclockwise rotation of the printing roller (201). The ink flows into the ink collection groove (11) along the right inclined surface of the inverted V groove (2022).

8. The device for label printing and cutting according to claim 7, characterized in that, Both sides of the ink plate (202) are provided with baffles, which are used to prevent ink from overflowing from the sides of the ink plate (202).

9. The device for label printing and cutting according to claim 1, characterized in that, The focused spot diameter of the fiber laser is no higher than 0.1 mm.

10. A method for cutting labels for inkjet printing, characterized in that, Includes the device for label printing and cutting as described in any one of claims 1-9. Step 1: Place the printing material roll (7) on the unwinding roller (101), and push the piston (8) through the thrust mechanism (12) to make the oil in the oil chamber (1011) push the pressing cylinder (9) outward to position the printing material roll (7) coaxially; start the feeding drive component, and after the tension roller (502) adjusts the tension, the printing substrate is guided and transported to the printing mechanism (2) by the guide roller group (102). Step 2: The servo motor drives the printing roller (201) to rotate counterclockwise. The ink nozzle replenishes ink to the ink guide slope (2021). The ink collects in the ink collection area (10) and adheres to the pattern area of ​​the printing roller (201). The doctor blade (203) scrapes off the excess ink on the surface of the printing roller (201). The printing roller (201) contacts the printing substrate to complete the printing. The ink scraped off by the inverted V-shaped groove (2022) at the bottom of the ink plate (202) flows into the ink collection tank (11) for recycling. Step 3: Drying treatment. The printed substrate after ink printing is conveyed to the bottom of the drying component (6). The heating tube (601) heats the air, and the fan (602) blows the hot air onto the printing surface of the printing substrate to complete the ink drying. Step 4: Laser cutting. The dried printing substrate is transported to the cutting mechanism (3), and the fiber laser cuts the label outline of the printing substrate. Step 5: Counting and collecting labels. The cut labels are conveyed by the conveyor belt (4), and the number of labels is counted by the counting sensor. Finally, the labels fall into the collection box (401) to complete the collection.

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