A laser engraving device for sleeve anilox roller processing

Abstract

This invention relates to the field of anilox roller engraving technology and discloses a laser engraving device for sleeve anilox roller processing, including a cabinet. The cabinet contains a three-axis motion module, and a first electric push rod is fixedly mounted on the three-axis motion module. The telescopic end of the first electric push rod is fixedly connected to a laser engraving head. A dual-cavity independent airflow system with a closed-loop circulating air-cooling structure is used. The first annular cavity uses real-time negative pressure to draw in high-temperature fumes and dust generated during laser engraving. Solid particles are effectively trapped by the filter plate inside the filter tube, preventing fumes from obstructing the laser beam path and ensuring clarity and uniformity during laser engraving. Simultaneously, the filtered clean circulating airflow is delivered to the second annular cavity and blown along the guide direction to the engraved area for air cooling, improving the cooling speed and preventing problems such as micro-deformation, burrs on the edges of the cells, and thermal oxidation peeling caused by localized high temperatures.

Description

Technical Field

[0001] This invention relates to the field of anilox roller engraving technology, and in particular to a laser engraving device for sleeve anilox roller processing. Background Technology

[0002] With its advantages of convenient assembly and disassembly, low maintenance cost, and strong versatility, sleeve-type anilox rollers are widely used in precision processing fields such as flexographic printing, film coating, and paper varnishing. The uniformity and smoothness of the anilox roller surface cells directly determine the quantitative transfer accuracy of ink and coating, making it a core component to ensure product processing quality. When engraving the anilox roller surface cells, laser engraving is generally used.

[0003] Existing laser engraving equipment generally relies on the linkage between the uniform rotation of the roller and the axial feed of the laser head to achieve full-area engraving of the roller surface when performing curved surface engraving on the sleeve anilox roller. However, in actual production, due to the fact that metal shavings, dust and other impurities are easily left on the surface of the sleeve workpiece during the transfer, clamping and pre-processing process, the existing solution is generally to clean the roller before engraving by manual or equipment. However, during the engraving process, the roller surface is easily contaminated with impurities again, resulting in impurity residue in the area to be engraved. The presence of impurities can cause defects such as uneven depth of the anilox cells, missing cells, and surface burns. On the other hand, during the laser engraving process, the high-energy laser beam etching of the metal sleeve will continuously generate a large amount of metal fumes, high-temperature slag and residual heat. Existing solutions generally only configure a single negative pressure dust collection structure or a fixed air cooling structure, which has limited functionality and poor adaptability. Traditional negative pressure dust collection structures can only simply extract dust and cannot effectively cool the engraved area. Local high temperatures can easily cause micro-deformation, burrs on the edges of the mesh, and thermal oxidation peeling. Therefore, a laser engraving device for sleeve anilox roller processing is proposed to solve the above problems. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a laser engraving device for processing sleeve anilox rollers.

[0005] The laser engraving device for processing anilox rollers provided by this invention adopts the following technical solution: A laser engraving device for processing sleeve anilox rollers includes a cabinet, inside which is provided a three-axis motion module. A first electric push rod is fixedly installed on the sliding component of the three-axis motion module. The telescopic end of the first electric push rod is fixedly connected to a laser engraving head. An auxiliary mechanism is provided on the outside of the laser engraving head. The auxiliary mechanism includes an annular frame and an annular outer plate. The annular frame and the annular outer plate are respectively located on the left and right sides of the laser engraving head along the sleeve feed direction. An annular scraper is rotatably connected to the inner side of the annular outer plate. A fixing component is provided between the annular frame and the annular outer plate to connect them. The annular frame has two mutually isolated annular cavities inside. An air inlet pipe is fixedly connected to the side of the annular frame facing the laser engraving head, and the air inlet pipe communicates with the first annular cavity. Multiple exhaust holes are provided on the inner wall of the annular frame. The hole is connected to the second annular cavity. An annular guide plate is fixedly connected to the inner side of the annular frame. Multiple exhaust holes are circumferentially distributed at equal intervals on the outer side of the annular guide plate. The annular guide plate is drawn away from the first annular cavity to direct the airflow discharged from the exhaust holes in a direction away from the first annular cavity. An airflow control component is fixedly connected to the annular frame to absorb the smoke during the engraving process and to cool the anilox roller. The airflow control component is connected to the first annular cavity and the second annular cavity respectively. A positioning mechanism for fixing the anilox roller is fixedly connected to the rear side of the inner cavity of the cabinet.

[0006] By adopting the above technical solution, the annular scraper can pre-scrape and clean the sleeve surface before engraving, removing oxide scale, dust, and particulate impurities from the workpiece surface in advance, preventing impurities from blocking the laser beam or embedding into the engraving mesh, thus ensuring the engraving quality. At the same time, during the anilox roller engraving process, the arc-shaped receiving plate is set below the anilox roller to receive the scraped impurities, which is conducive to the centralized treatment of impurities. Combined with the annular scraper in front of the laser engraving head, impurities are cleaned in advance, making the cleaning method more convenient and efficient, and avoiding the situation where secondary contamination of the roller surface may occur during subsequent processing and installation after traditional pre-cleaning.

[0007] Preferably, a support frame is fixedly connected to the sliding component of the three-axis motion module, the main body of the first electric push rod passes through the support frame and is fixedly connected to the support frame, and a plug plate is fixedly connected to the annular frame, the plug plate extends into the support frame and is connected to the support frame by bolts.

[0008] By adopting the above technical solution, the plug-in plate and the support frame can be easily disassembled and assembled after being connected by bolts.

[0009] Preferably, the fixing component includes multiple positioning rods, which are fixedly connected to one side of the annular frame at equal intervals along the circumference. Each positioning rod penetrates the annular outer plate, and a fixing ring is threaded onto the outside of each positioning rod. The fixing ring is tightly fitted against the outer wall of the annular outer plate to achieve locking and fixing.

[0010] By adopting the above technical solution, after the positioning rod and the annular outer plate are fixedly connected by the fixing ring, the annular outer plate and the annular frame can be kept fixed.

[0011] Preferably, an arc-shaped receiving plate is provided on one side of the annular scraper, and an annular groove is opened on one side of the annular scraper. The arc-shaped receiving plate extends into the annular groove and slides in cooperation with the annular groove. A connecting tube is integrally formed at the bottom of the arc-shaped receiving plate, and a receiving tube is threaded at the lower end of the connecting tube.

[0012] By adopting the above technical solution, the arc-shaped receiving plate receives the impurities scraped off the outer surface of the annular scraper by the circular scraper.

[0013] Preferably, a brush is fixedly connected inside the arc-shaped receiving plate, the brush is located at the top of the connecting pipe, and the brush is in contact with one side of the annular scraper.

[0014] By adopting the above technical solution, the brush can scrape away impurities on the annular scraper.

[0015] Preferably, the airflow control component includes a fan and a filter tube. The fan is fixedly connected to the bottom of the cabinet cavity. A first pipe is fixedly connected between the bottom of the filter tube and the input end of the fan. A second pipe is fixedly connected to the outside of the annular frame. The second pipe communicates with the first annular cavity. A cover plate is fixedly connected to one end of the second pipe. The cover plate is located above the filter tube. The filter tube extends upward into the inside of the cover plate and is sealed to the cover plate. An assembly ring is rotatably connected to the outside of the cover plate. The filter tube passes through the assembly ring and is threadedly connected to the assembly ring. A filter plate is fixedly connected inside the filter tube.

[0016] By adopting the above technical solution, the filter plate inside the filter tube can filter dust and impurities in the smoke.

[0017] Preferably, the output end of the fan is fixedly connected to a third pipe, one end of the third pipe is fixedly connected to the outside of the annular frame, the third pipe is connected to the second annular cavity, a water tank is provided on one side of the cabinet, and the third pipe extends into the water tank.

[0018] By adopting the above technical solution, after injecting coolant into the water tank, the coolant can cool and reduce the temperature of the third pipe.

[0019] Preferably, the positioning mechanism includes a mounting frame, which is fixedly connected to the rear side wall of the cabinet cavity. Two movable blocks are slidably connected laterally inside the mounting frame, and mounting plates are fixedly connected to each of the two movable blocks. Two hollow rods are provided between the two mounting plates. Ring plates are rotatably connected to the outside of the hollow rods. Fixed rods are fixedly connected between the two mounting plates and their corresponding ring plates. A movable rod is provided inside the hollow rod, extending out of the hollow rod and slidingly engaging with it. Multiple bonding plates are evenly spaced along the circumference of the outer side of the hollow rod, extending into the hollow rod and slidingly engaging with it. One end of each bonding plate is connected to a push-pull plate via a pivot, and one end of each push-pull plate is connected to one end of the movable rod via a pivot.

[0020] By adopting the above technical solution, the push-pull plate can push and pull the bonding plate after swinging.

[0021] Preferably, a second electric push rod is fixedly connected to the mounting plate. The telescopic end of the second electric push rod is rotatably connected to one end of the moving rod. A gear ring is fixedly connected to the outside of one of the hollow rods. A first motor is fixedly connected inside the annular plate on the outside of the hollow rod. A gear is fixedly connected to the first motor through an output shaft. The gear is located on one side of the gear ring and meshes with the gear ring.

[0022] By adopting the above technical solution, the gear can drive the gear ring to rotate after it rotates.

[0023] Preferably, a bidirectional threaded rod is rotatably connected inside the mounting frame. The bidirectional threaded rod passes through two moving blocks in sequence and is connected to the moving blocks by threads. A second motor is fixedly connected to one side of the mounting frame. The second motor is fixedly connected to one end of the bidirectional threaded rod through its output shaft.

[0024] By adopting the above technical solution, the thread directions at both ends of the second bidirectional threaded rod are opposite.

[0025] In summary, the present invention has the following beneficial technical effects: 1. A laser engraving device for processing anilox rollers, comprising a dual-cavity independent airflow system with a closed-loop circulating air-cooling structure. The first annular cavity uses real-time negative pressure to draw in the high-temperature fumes and dust generated during laser engraving. The solid particles are effectively trapped by the filter plate inside the filter tube, preventing the smoke from obstructing the laser beam path and the accumulation of carbon dust on the roller surface, thus ensuring the clarity and uniformity of the laser engraving. At the same time, the filtered clean circulating airflow is delivered to the second annular cavity and blown along the guide direction to the engraved area for air cooling, improving the cooling speed and avoiding problems such as micro-deformation, burrs on the edges of the mesh cells, and thermal oxidation peeling caused by local high temperatures.

[0026] 2. A laser engraving device for processing anilox rollers, wherein the annular scraper can pre-scrape and clean the surface of the sleeve before engraving, removing oxide scale, dust and particulate impurities from the workpiece surface in advance, preventing impurities from blocking the laser beam or embedding into the engraving mesh, thus ensuring engraving quality. At the same time, during the anilox roller engraving process, an arc-shaped receiving plate is set below the anilox roller to receive the scraped impurities, which is conducive to the centralized treatment of impurities. Combined with the annular scraper in front of the laser engraving head, impurities are cleaned in advance, making the cleaning method more convenient and efficient, avoiding the situation where secondary contamination of the roller surface may occur during subsequent processing and installation after traditional pre-cleaning.

[0027] 3. A laser engraving device for processing anilox rollers, which effectively avoids the obstruction and interference of the outer clamps on the laser engraving operation and surface cleaning process by supporting and positioning the inner sides of both ends of the anilox rollers. At the same time, in conjunction with the push-pull plate hinged transmission structure, it can drive multiple sets of circumferential bonding plates to expand radially synchronously, realize the uniform support and positioning of the inner wall of the workpiece at multiple points, and ensure that the rotation center of the sleeve and the laser engraving center are precisely coaxial, which is conducive to improving the structural stability and processing accuracy during continuous rotation engraving. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the structure of the present invention; Figure 3 This is a cross-sectional view of the filter tube and cover plate after disassembly in this invention; Figure 4 This is a structural diagram of the support frame and the plug-in plate after disassembly in this invention; Figure 5 for Figure 4 Enlarged view of point A in the image; Figure 6 This is a structural diagram of the annular frame and the annular outer plate after separation in this invention; Figure 7 This is a cross-sectional view of the annular frame in this invention; Figure 8 This is a cross-sectional view of the annular scraper in this invention; Figure 9 This is a schematic diagram of the mounting frame in this invention; Figure 10 This is a cross-sectional view of the hollow rod in this invention.

[0029] Explanation of reference numerals in the attached drawings: 1. Cabinet; 2. Three-axis motion module; 3. First electric push rod; 4. Laser engraving head; 5. Auxiliary mechanism; 501. Annular frame; 502. Annular outer plate; 503. Annular scraper; 504. First annular cavity; 505. Second annular cavity; 506. Air inlet pipe; 507. Exhaust port; 508. Annular guide plate; 509. Brush; 510. Material receiving pipe; 511. Support frame; 512. Insertion plate; 513. Arc-shaped material receiving plate; 6. Fixing component; 601. Positioning rod; 602. Fixing ring; 7. Airflow control component; 701. Fan. 702. Filter tube; 703. First pipe; 704. Second pipe; 705. Cover plate; 706. Filter plate; 707. Third pipe; 708. Water tank; 709. Assembly ring; 8. Positioning mechanism; 801. Mounting frame; 802. Moving block; 803. Mounting plate; 804. Hollow rod; 805. Ring plate; 806. Fixed rod; 807. Moving rod; 808. Adhesive plate; 809. Push-pull plate; 810. Second electric push rod; 811. Gear ring; 812. First motor; 813. Gear; 814. Bidirectional threaded rod; 815. Second motor. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 -Appendix Figure 10 The present invention will be described in further detail below.

[0031] like Figures 1 to 10 As shown, a laser engraving device for processing sleeve anilox rollers according to an embodiment of the present invention includes a cabinet 1, a three-axis motion module 2 is provided inside the cabinet 1, a first electric push rod 3 is fixedly installed on the sliding part of the three-axis motion module 2, a laser engraving head 4 is fixedly connected to the telescopic end of the first electric push rod 3, and an auxiliary mechanism 5 is provided on the outside of the laser engraving head 4. The auxiliary mechanism 5 includes an annular frame 501 and an annular outer plate 502. The annular frame 501 and the annular outer plate 502 are respectively located on the left and right sides of the laser engraving head 4 along the sleeve feed direction. An annular scraper 503 is rotatably connected to the inner side of the annular outer plate 502. A fixing component 6 is provided between the annular frame 501 and the annular outer plate 502 to connect the annular frame 501 and the annular outer plate 502. The annular frame 501 has a first annular cavity 504 and a second annular cavity 505 that are isolated from each other. An air inlet pipe 506 is fixedly connected to the side of the annular frame 501 facing the laser engraving head 4. The air inlet pipe 506 is connected to the first annular cavity 504. Multiple exhaust holes 507 are provided on the inner wall of the annular frame 501. The exhaust holes 507 are connected to the second annular cavity. The channels 505 are connected. An annular guide plate 508 is fixedly connected to the inner side of the annular frame 501. Multiple exhaust holes 507 are circumferentially distributed at equal intervals on the outer side of the annular guide plate 508. The annular guide plate 508 is drawn away from the first annular cavity 504 to guide the airflow discharged from the exhaust holes 507 in the direction away from the first annular cavity 504. An airflow control component 7 is fixedly connected to the annular frame 501 to absorb the smoke during the engraving process and to cool the anilox roller. The airflow control component 7 is connected to the first annular cavity 504 and the second annular cavity 505 respectively. A positioning mechanism 8 for fixing the anilox roller is fixedly connected to the rear side of the inner cavity of the cabinet 1. During positioning, the positioning mechanism 8 supports and positions the anilox roller from the inside.

[0032] In this device, the three-axis motion module 2 serves as the three-dimensional feed motion base for the entire machine in the horizontal, vertical, and longitudinal directions. This structure is existing technology and will not be described in detail here. Its sliding components can drive the first electric push rod 3, the laser engraving head 4, and the entire set of auxiliary mechanisms 5 to synchronously complete high-precision displacement, thereby adapting to the continuous laser engraving operation of long hollow sleeves. In the specific implementation process, the hollow sleeve anilox roller is first inserted through the annular frame 501 and the annular scraper 503. The annular scraper 503 contacts the outer curved surface of the anilox roller. Then, the inner side of the anilox roller is supported and positioned by the positioning mechanism 8. Since the auxiliary mechanism 5 moves synchronously with the laser engraving head 4, Therefore, when the three-axis motion module 2 drives the laser engraving head 4 to move, the anilox roller workpiece moves synchronously. The purpose of setting up the first electric push rod 3 is that the first electric push rod 3 can drive the laser engraving head 4 to move horizontally, thereby adjusting the distance between the laser engraving head 4 and the anilox roller according to the actual processing requirements. The auxiliary mechanism 5 moves synchronously with the laser engraving head 4. During operation, the annular scraper 503 is located upstream of the laser engraving head 4 in the direction of travel and moves with the laser engraving head 4, thereby scraping the sleeve engraving area in advance to remove impurities attached to the surface of the anilox roller and avoid impurities blocking the laser beam, which would have an adverse effect on the engraving quality. The annular frame 501 is located downstream of the laser engraving head 4 in the direction of travel. The internal dual-cavity structure of the annular frame 501 achieves airflow functional zoning. The first annular cavity 504 is responsible for negative pressure fume extraction, and the second annular cavity 505 is responsible for air cooling of the engraved area on the anilox roller surface. Specifically, during operation: the air inlet pipe 506 faces the engraving area of ​​the laser engraving head 4. When the airflow control component 7 is working, the first annular cavity 504, in conjunction with the air inlet pipe 506, continuously extracts the high-temperature fumes and dust generated during laser engraving, preventing smoke from obstructing the laser field of view and preventing carbon buildup on the roller surface. The dust and exhaust gas generated during the engraving process are drawn in and filtered by the first annular cavity 504. The filtered and purified clean airflow is then sent into the second annular cavity 505, and then a low-temperature cooling airflow is ejected through the circumferentially arranged exhaust holes 507. With the guidance of the converging annular guide plate 508, the cooling airflow is blown to the area where the sleeve engraving process is completed. Under the guidance of the annular guide plate 508, the blown airflow is blown downstream in the direction of travel of the laser engraving head 4, which can prevent the blown airflow from entering the laser engraving area and obstructing the intake of smoke and dust, thereby improving the cooling speed of the engraved area.

[0033] A support frame 511 is fixedly connected to the sliding component of the three-axis motion module 2. The main body of the first electric push rod 3 passes through the support frame 511 and is fixedly connected to the support frame 511. A plug plate 512 is fixedly connected to the annular frame 501. The plug plate 512 extends into the support frame 511 and is connected to the support frame 511 by bolts.

[0034] The support frame 511 is fixedly mounted on the sliding component of the three-axis motion module 2, providing a fixed mounting base for the first electric push rod 3. The main body of the electric push rod passes through the assembly structure of the support frame 511, which can improve the stability of the electric push rod after installation. The plug plate 512 is connected to the support frame 511 by bolts, realizing convenient assembly and disassembly between the two. After installation in this way, the annular frame 501 and the annular scraper 503 always maintain a fixed relative position with the laser engraving head 4, and move synchronously with the three-axis motion module 2 throughout the process, ensuring that the cleaning, smoking, and cooling processes are synchronized with the laser engraving process in real time. Furthermore, through the convenient disassembly steps of the above-mentioned plug-in plate 512 and support frame 511, the annular frame 501 can be easily disassembled and replaced. In specific implementation, the present invention can be equipped with multiple spare annular frames 501 adapted to different working conditions. The inner walls of the first annular cavity 504 and the second annular cavity 505 of each annular frame 501 can be differently coated to achieve targeted working condition adaptation. Specifically, for processing scenarios where molten sticky metal dust is easily generated during engraving operations and the pipe walls are easily blocked by dust accumulation, an annular frame with a modified polytetrafluoroethylene anti-stick coating sprayed on the inner wall of the cavity is selected. Utilizing the low surface energy characteristics of this coating, Effectively avoids the adhesion and accumulation of fine dust and molten waste, preventing blockages caused by adhesion, and is suitable for long-term, large-volume continuous engraving operations; for high-power laser high-temperature processing conditions and scenarios where the air duct is in a high-temperature radiation environment for a long time, the ring frame 501 equipped with a high-temperature resistant inorganic ceramic coating can be replaced, effectively avoiding the defects of conventional organic coatings such as high-temperature melting, peeling, and contamination of circulating airflow; through the detachable and replaceable ring frame 501 with differentiated coating configurations, the equipment can flexibly adapt to various working conditions such as low-temperature conventional processing, high-temperature high-power processing, and high-dust continuous processing, effectively improving the versatility and adaptability of the device.

[0035] The fixing component 6 includes multiple positioning rods 601, which are fixedly connected to one side of the annular frame 501 at equal intervals along the circumference. All positioning rods 601 penetrate the annular outer plate 502. A fixing ring 602 is threaded onto the outside of the positioning rod 601, and the fixing ring 602 is tightly attached to the outer wall of the annular outer plate 502 to achieve locking and fixing.

[0036] During assembly, after the positioning rod 601 passes through the annular outer plate 502, the fixing ring 602 is tightened by screwing it in. The overall locking and fixing is achieved by the clamping force between the fixing ring 602 and the outer wall of the annular outer plate 502. The assembly structure is simple and easy to disassemble and assemble. It is convenient to disassemble, replace, maintain and clean the annular scraper 503 after wear. When dealing with anilox rollers of different diameters, the annular scraper 503 with different inner ring diameters can be replaced to match it, thereby improving the adaptability of this device.

[0037] An arc-shaped receiving plate 513 is provided on one side of the annular scraper 503. An annular groove is opened on one side of the annular scraper 503. The arc-shaped receiving plate 513 extends into the annular groove and slides in cooperation with the annular groove. A connecting tube is integrally formed at the bottom of the arc-shaped receiving plate 513. The connecting tube is fixedly connected to one side of the annular outer plate 502. The lower end of the connecting tube is threaded with a receiving tube 510.

[0038] The arc-shaped receiving plate 513 can slide within the annular groove. Since the connecting tube is fixedly connected to one side of the annular outer plate 502, after the annular scraper 503 contacts the outside of the anilox roller, as the anilox roller rotates during the engraving process, there is a certain friction between the annular scraper 503 and the anilox roller after they come into contact. Therefore, the annular scraper 503 may rotate along with the anilox roller. If the annular scraper 503 rotates along with the anilox roller, the arc-shaped receiving plate 513 can slide within the annular groove. The connecting tube is fixedly connected to the annular outer plate 502, so that the arc-shaped receiving plate 513 remains stationary as a whole. The annular scraper 503 rotates synchronously with the anilox roller due to friction. Relying on the sliding cooperation between the annular groove and the arc-shaped receiving plate 513, the rotation of the scraper will not drive the arc-shaped receiving plate 513 to move synchronously. When the impurities scraped off by the scraper rotate to the corresponding position of the arc-shaped receiving plate 513 with the rotation of the sleeve, they fall into the arc-shaped receiving plate 513 by gravity and are collected. The annular scraper 503 can receive the impurities that fall downward after being scraped off the anilox roller. The received impurities enter the receiving pipe 510 for storage. After the receiving pipe 510 is removed, the impurities stored inside the receiving pipe 510 can be cleaned uniformly.

[0039] A brush 509 is fixedly connected inside the arc-shaped receiving plate 513. The brush 509 is located at the top of the connecting pipe and is in contact with one side of the annular scraper 503.

[0040] After the bristles on the brush 509 come into contact with one side of the annular scraper 503, impurities on the annular scraper 503 can be brushed off while the annular scraper 503 rotates with the anilox roller.

[0041] The airflow control assembly 7 includes a fan 701 and a filter tube 702. The fan 701 is fixedly connected to the bottom of the inner cavity of the cabinet 1. A first pipe 703 is fixedly connected between the bottom of the filter tube 702 and the input end of the fan 701. A second pipe 704 is fixedly connected to the outside of the annular frame 501. The second pipe 704 is connected to the first annular cavity 504. A cover plate 705 is fixedly connected to one end of the second pipe 704. The cover plate 705 is located above the filter tube 702. The filter tube 702 extends upward into the inside of the cover plate 705 and is sealed to the cover plate 705. An assembly ring 709 is rotatably connected to the outside of the cover plate 705. The filter tube 702 passes through the assembly ring 709 and is connected to the assembly ring 709 by a thread. A filter plate 706 is fixedly connected inside the filter tube 702.

[0042] When the suction purification circuit of the airflow control component 7 is working, the input end of the fan 701 forms a negative pressure suction passage with the first pipe 703, the second pipe 704 and the first annular cavity 504. The high-temperature smoke and dust generated by laser engraving are quickly sucked into the first annular cavity 504 by the negative pressure, and flow through the second pipe 704, the filter tube 702 and the first pipe 703 in sequence. When it enters the filter tube 702, the filter plate 706 inside the filter tube 702 can efficiently intercept solid impurities such as metal slag, carbon powder and fine dust, to achieve smoke purification and filtration, and prevent impurities from entering the fan 701 and causing equipment wear and blockage. At the same time, the filter tube 702 and the assembly ring 709 are connected by thread assembly. By rotating the assembly ring 709, the tight connection between the filter tube 702 and the cover plate 705 can be ensured and the connection between the two can be released, which is convenient for the later disassembly of the filter tube 702, replacement and cleaning of the filter plate 706, and ensures a long-term stable smoke filtration and purification effect.

[0043] The output end of the fan 701 is fixedly connected to a third pipe 707. One end of the third pipe 707 is fixedly connected to the outside of the annular frame 501. The third pipe 707 is connected to the second annular cavity 505. A water tank 708 is provided on one side of the cabinet 1. The third pipe 707 extends into the water tank 708.

[0044] In practice, coolant can be injected into the water tank 708. The third pipe 707 can be made of a corrugated hose using a heat-conducting material such as stainless steel, thus providing resistance to dust abrasion and high temperatures during mass production. The fan 701 delivers the filtered and purified clean airflow to the third pipe 707, which extends into the water body of the water tank 708. The water body fully contacts the outer wall of the third pipe 707 for heat exchange. Utilizing the high specific heat capacity of the water, the residual heat from the engraving carried by the airflow is quickly absorbed, reducing the temperature of the circulating airflow and achieving water-cooled airflow cooling. After cooling... The low-temperature clean airflow is introduced into the second annular cavity 505 through the third pipe 707. As the laser engraving work proceeds, when the engraved area is inside the annular frame 501, the cooled airflow is finally blown to the sleeve engraving area through the exhaust port 507. Compared with conventional room temperature air cooling, the water-cooled low-temperature airflow has a higher cooling efficiency and can quickly remove the concentrated heat of the sleeve engraving area to improve its cooling speed. At the same time, the overall closed-loop circulation structure of the airflow does not require an external air source, making it more energy-efficient and environmentally friendly, and realizing the integrated closed-loop operation of smoke purification, airflow cooling and workpiece cooling.

[0045] The positioning mechanism 8 includes a mounting frame 801, which is fixedly connected to the rear side wall of the inner cavity of the cabinet 1. Two movable blocks 802 are slidably connected laterally inside the mounting frame 801. Mounting plates 803 are fixedly connected to each of the two movable blocks 802. Two hollow rods 804 are provided between the two mounting plates 803. Ring plates 805 are rotatably connected to the outside of the hollow rods 804. Fixing rods 806 are fixedly connected between the two mounting plates 803 and the corresponding ring plates 805. The hollow rod 804 has a movable rod 807 inside. The movable rod 807 extends out of the hollow rod 804 and slides in cooperation with the hollow rod 804. Multiple bonding plates 808 are evenly spaced along the circumference on the outer side of the hollow rod 804. All bonding plates 808 extend into the hollow rod 804 and slide in cooperation with the hollow rod 804. One end of each bonding plate 808 is connected to a push-pull plate 809 through a pivot. One end of each push-pull plate 809 is connected to one end of the movable rod 807 through a pivot.

[0046] The positioning mechanism 8 is used to internally support and fix the inner wall of the anilox roller, thereby preventing the external clamping from obstructing the engraving and scraping of impurities by the annular scraper 503 on the outer surface of the anilox roller. The moving block 802 can slide horizontally inside the mounting frame 801. The moving block 802 drives the mounting plate 803 to move, and the mounting plate 803 drives the hollow rod 804 to move, so that the two hollow rods 804 are inserted from both ends of the anilox roller, and thus can be adapted to sleeves of different lengths. The moving rod 807 can be inserted into the hollow rod 804. 04. The internal horizontal sliding mechanism, and when the moving rod 807 moves axially, it will drive multiple sets of push-pull plates 809 to swing synchronously through the rotating shaft. By using the angular swing displacement of the push-pull plates 809, multiple circumferentially distributed bonding plates 808 are pushed to slide and expand radially outward in sync, so that the multiple bonding plates 808 are synchronously bonded to the inner wall of the sleeve, realizing multi-point uniform internal support positioning. The multi-point circumferential uniform force positioning method can ensure that the center of the sleeve is coaxial with the engraving center, avoiding the problems of engraving eccentricity and uneven distribution of mesh patterns.

[0047] A second electric push rod 810 is fixedly connected to the mounting plate 803. The telescopic end of the second electric push rod 810 is rotatably connected to one end of the moving rod 807. A gear ring 811 is fixedly connected to the outside of one of the hollow rods 804. A first motor 812 is fixedly connected inside the annular plate 805 on the outside of the hollow rod 804. A gear 813 is fixedly connected to the first motor 812 through the output shaft. The gear 813 is located on one side of the gear ring 811 and meshes with the gear ring 811.

[0048] The second electric push rod 810 is used to drive the moving rod 807 to move horizontally. The first motor 812 is used to drive the gear 813 to rotate. After the gear 813 rotates, it drives the gear ring 811 to rotate. The gear ring 811 then drives the connected hollow rod 804 to rotate. The hollow rod 804 drives the bonding plate 808 to revolve around the hollow rod 804, so as to further control the rotation of the outer anilox roller and cause the laser engraving head 4 to engrave different areas on the outer side of the anilox roller.

[0049] The mounting frame 801 is rotatably connected to a bidirectional threaded rod 814. The bidirectional threaded rod 814 passes through two moving blocks 802 in sequence and is connected to the moving blocks 802 by threads. A second motor 815 is fixedly connected to one side of the mounting frame 801. The second motor 815 is fixedly connected to one end of the bidirectional threaded rod 814 through its output shaft.

[0050] The threads at both ends of the bidirectional threaded rod 814 are in opposite directions. The second motor 815 is used to drive the bidirectional threaded rod 814 to rotate. After the bidirectional threaded rod 814 rotates, it can drive the two moving blocks 802 to move towards each other or away from each other, thereby realizing the adjustment of the distance between the two moving blocks 802 and enabling it to quickly adapt to hollow sleeve workpieces of different lengths.

[0051] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A laser engraving device for processing anilox rollers, characterized in that: Includes a cabinet (1), inside which is provided a three-axis motion module (2), on which a first electric push rod (3) is fixedly installed, and on the sliding part of the three-axis motion module (2), a laser engraving head (4) is fixedly connected to the telescopic end of the first electric push rod (3), and an auxiliary mechanism (5) is provided on the outside of the laser engraving head (4). The auxiliary mechanism (5) includes an annular frame (501) and an annular outer plate (502). The annular frame (501) and the annular outer plate (502) are respectively located on the left and right sides of the laser engraving head (4) along the sleeve feed direction. An annular scraper (503) is rotatably connected to the inner side of the annular outer plate (502). A fixing component (6) is provided between the annular frame (501) and the annular outer plate (502). The fixing component (6) is used to connect the annular frame (501) and the annular outer plate (502). The annular frame (501) has a first annular cavity (504) and a second annular cavity (505) that are isolated from each other. An air inlet pipe (506) is fixedly connected to the side of the annular frame (501) facing the laser engraving head (4). The air inlet pipe (506) is connected to the first annular cavity (504). An opening is made on the inner wall of the annular frame (501). Multiple exhaust holes (507) are provided, and the exhaust holes (507) are connected to the second annular cavity (505). An annular guide plate (508) is fixedly connected to the inner side of the annular frame (501). Multiple exhaust holes (507) are circumferentially distributed at equal intervals on the outer side of the annular guide plate (508). The annular guide plate (508) is drawn towards the side away from the first annular cavity (504) to guide the airflow discharged from the exhaust holes (507) in the direction away from the first annular cavity (504). An airflow control component (7) is fixedly connected to the annular frame (501) to adsorb the smoke during the engraving process and to cool the anilox roller. The airflow control component (7) is connected to the first annular cavity (504) and the second annular cavity (505) respectively. A positioning mechanism (8) for fixing the anilox roller is fixedly connected to the rear side of the inner cavity of the cabinet (1).

2. The laser engraving device for processing anilox rollers according to claim 1, characterized in that: The sliding component of the three-axis motion module (2) is also fixedly connected to a support frame (511). The main body of the first electric push rod (3) passes through the support frame (511) and is fixedly connected to the support frame (511). A plug plate (512) is fixedly connected to the annular frame (501). The plug plate (512) extends into the support frame (511) and is connected to the support frame (511) by bolts.

3. The laser engraving device for processing anilox rollers according to claim 1, characterized in that: The fixing component (6) includes multiple positioning rods (601), which are fixedly connected to one side of the annular frame (501) at equal intervals along the circumference. All positioning rods (601) penetrate the annular outer plate (502). A fixing ring (602) is threaded onto the outside of the positioning rod (601), and the fixing ring (602) is tightly attached to the outer wall of the annular outer plate (502) to achieve locking and fixing.

4. The laser engraving device for processing anilox rollers according to claim 1, characterized in that: The annular scraper (503) has an arc-shaped receiving plate (513) on one side, and an annular groove is opened on one side of the annular scraper (503). The arc-shaped receiving plate (513) extends into the annular groove and slides in cooperation with the annular groove. The bottom of the arc-shaped receiving plate (513) is integrally formed with a connecting tube, and the lower end of the connecting tube is threaded with a receiving tube (510).

5. The laser engraving device for processing anilox rollers according to claim 4, characterized in that: A brush (509) is fixedly connected inside the arc-shaped receiving plate (513). The brush (509) is located at the top of the connecting pipe and is in contact with one side of the annular scraper (503).

6. The laser engraving device for processing anilox rollers according to claim 1, characterized in that: The airflow control assembly (7) includes a fan (701) and a filter tube (702). The fan (701) is fixedly connected to the bottom of the inner cavity of the cabinet (1). A first pipe (703) is fixedly connected between the bottom of the filter tube (702) and the input end of the fan (701). A second pipe (704) is fixedly connected to the outside of the annular frame (501). The second pipe (704) is connected to the first annular cavity (504). A cover plate (705) is fixedly connected to the end of the filter tube (702). The cover plate (705) is located above the filter tube (702). The filter tube (702) extends upward into the inside of the cover plate (705) and is sealed to the cover plate (705). An assembly ring (709) is rotatably connected to the outside of the cover plate (705). The filter tube (702) passes through the assembly ring (709) and is connected to the assembly ring (709) by a thread. A filter plate (706) is fixedly connected inside the filter tube (702).

7. The laser engraving device for processing anilox rollers according to claim 6, characterized in that: The output end of the fan (701) is fixedly connected to a third pipe (707). One end of the third pipe (707) is fixedly connected to the outside of the annular frame (501). The third pipe (707) is connected to the second annular cavity (505). A water tank (708) is provided on one side of the cabinet (1). The third pipe (707) extends into the water tank (708).

8. The laser engraving device for processing anilox rollers according to claim 1, characterized in that: The positioning mechanism (8) includes a mounting frame (801), which is fixedly connected to the rear side wall of the inner cavity of the cabinet (1). Two moving blocks (802) are slidably connected laterally inside the mounting frame (801). Mounting plates (803) are fixedly connected to the two moving blocks (802). Two hollow rods (804) are provided between the two mounting plates (803). A ring plate (805) is rotatably connected to the outside of the hollow rods (804). A fixing rod (806) is fixedly connected between the two mounting plates (803) and the corresponding ring plate (805). The hollow rod (804) is provided with a movable rod (807) inside. The movable rod (807) extends out of the hollow rod (804) and slides in cooperation with the hollow rod (804). Multiple bonding plates (808) are arranged at equal intervals along the circumference on the outer side of the hollow rod (804). The multiple bonding plates (808) extend into the hollow rod (804) and slide in cooperation with the hollow rod (804). One end of each bonding plate (808) is connected to a push-pull plate (809) through a pivot. One end of each push-pull plate (809) is connected to one end of the movable rod (807) through a pivot.

9. The laser engraving device for processing sleeve anilox rollers according to claim 8, characterized in that: A second electric push rod (810) is fixedly connected to the mounting plate (803). The telescopic end of the second electric push rod (810) is rotatably connected to one end of the moving rod (807). A gear ring (811) is fixedly connected to the outside of one of the hollow rods (804). A first motor (812) is fixedly connected inside the annular plate (805) on the outside of the hollow rod (804). A gear (813) is fixedly connected to the first motor (812) through the output shaft. The gear (813) is located on one side of the gear ring (811) and meshes with the gear ring (811).

10. The laser engraving device for processing anilox rollers according to claim 8, characterized in that: The mounting frame (801) is rotatably connected to a bidirectional threaded rod (814). The bidirectional threaded rod (814) passes through two moving blocks (802) in sequence and is connected to the moving blocks (802) by threads. A second motor (815) is fixedly connected to one side of the mounting frame (801). The second motor (815) is fixedly connected to one end of the bidirectional threaded rod (814) through its output shaft.

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