Laser die cutting device for adhesive label packaging material

Abstract

The application discloses a kind of laser die cutting devices of self-adhesive packaging material, it is related to laser die cutting technical field, including laser cutting mechanism, laser cutting mechanism includes moving assembly, cutting support frame and cutting unit;Air duct component is fixed on cutting support frame by air duct support frame;Air duct component includes main air duct unit and vice air duct unit sequentially arranged from top to bottom, air duct unit and vice air duct unit between still be provided with air port switching component;Vice air duct unit is provided with several groups of second partition plate along its circumferential direction, and multiple groups of partition plate divide vice air duct unit into several groups of first air duct and second air duct;The inside of first air duct is provided with second grid unit, and the lower end of second air duct is connected with air knife unit;The outside of vice air duct unit is also provided with several groups of annularly arranged bubble generating unit;The uniformity and stability of airflow of the application are significantly improved, and the high precision and high stability of die cutting process are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser die cutting, and particularly relates to a laser die cutting device for adhesive label packaging material. BACKGROUND

[0002] The adhesive label packaging material is also called self-adhesive label material, which is a composite material with paper, film or other special materials as the surface material, the back coated with adhesive, and the bottom paper as the bottom paper. After printing, die cutting and other processes, the adhesive label packaging material becomes a finished product, which has the advantages of no need to brush glue, no need to use paste, no need to dip water, no pollution, saving label sticking time, wide application range, convenience and speed. Laser die cutting is a process of using high-energy and high-density laser beams to move quickly according to the designed pattern, and heating the die cutting material to the gasification temperature in an instant, so as to obtain continuous or intermittent cutting seams and indentations.

[0003] During the laser die cutting process of the adhesive label packaging material, when the laser is irradiated on the surface of the material, local heat accumulation will occur, and then the material will be softened, bulged and micro-deformed, especially in some composite materials. At the same time, under the action of the air cooling airflow, especially the pulse airflow or small scale vortex caused by the improper design of the air duct, the micro-deformation can be amplified, and the resonance effect of the material can be caused. This resonance not only causes the continuous micro-displacement or edge lifting of the material, but also causes the deviation of the laser focal point position, changes the focal length, further affects the interaction between the laser beam and the material interface, and thus produces irregular cutting depth and trajectory error. SUMMARY

[0004] In order to solve the defects in the prior art, the present application provides a laser die cutting device for adhesive label packaging material.

[0005] In order to solve the above technical problems, the present application provides the following technical scheme:

[0006] The present application provides a laser die cutting device for adhesive label packaging material, comprising:

[0007] The laser cutting mechanism comprises a moving assembly, a cutting support frame arranged on the moving assembly, and a cutting unit fixedly arranged on the cutting support frame;

[0008] The upper end of the cutting unit is provided with an air duct assembly, and the air duct assembly is fixed on the cutting support frame through an air duct support frame;

[0009] The air duct assembly comprises a main air duct unit and a secondary air duct unit arranged in sequence from top to bottom, and an air port switching assembly is further arranged between the main air duct unit and the secondary air duct unit;

[0010] The interior of the main air duct unit is provided with a first grid unit;

[0011] The secondary air duct unit is provided with a plurality of groups of second partition plates along the circumferential direction thereof, and the plurality of groups of second partition plates separate the secondary air duct unit into a plurality of groups of first air ducts and second air ducts, and the first air ducts and the second air ducts are arranged in a spaced manner;

[0012] The interior of the first air duct is provided with a second grid unit, and the lower end of the second air duct is connected with an air knife unit;

[0013] The outer side of the secondary air duct unit is further provided with a plurality of groups of bubble generating units arranged in a ring shape.

[0014] As a preferred technical solution of the present application, the interior of the main air duct unit is provided with a plurality of groups of first partition plates corresponding to the second partition plates one by one;

[0015] The plurality of groups of first partition plates separate the interior of the main air duct unit into a plurality of groups of air duct channels, and the air duct channels are arranged in correspondence with the first air ducts or the second air ducts.

[0016] As a preferred technical solution of the present application, the first grid unit includes a plurality of groups of first ring-shaped grid plates arranged in a ring shape and a plurality of groups of first vertical grid plates arranged perpendicularly to the first ring-shaped grid plates;

[0017] The second grid unit includes a plurality of groups of second ring-shaped grid plates arranged in a ring shape and a plurality of groups of second vertical grid plates arranged perpendicularly to the second ring-shaped grid plates;

[0018] The plurality of groups of ring-shaped grid plates and vertical grid plates separate the interior of the main air duct unit and the interior of the first air duct into a plurality of ventilation holes.

[0019] As a preferred technical solution of the present application, the thickness of the first vertical grid plate and the second vertical grid plate gradually increases from top to bottom.

[0020] As a preferred technical solution of the present application, the hole diameter of the lower end of the ventilation hole in the main air duct unit is greater than the hole diameter of the upper end of the ventilation hole in the first air duct.

[0021] As a preferred technical solution of the present application, the interior of the second air duct is provided with a connecting hole connected with the air knife unit.

[0022] As a preferred technical solution of the present application, the air outlet switching assembly includes:

[0023] An air outlet switching plate is rotationally arranged between the main air duct unit and the secondary air duct unit;

[0024] An outer gear ring is fixedly arranged on the outer side of the air port switching plate.

[0025] A driving gear is drivingly arranged with the outer gear ring and drivingly connected with a driving unit, which is fixedly arranged on the air duct support frame.

[0026] As a preferred technical solution of the present application, a plurality of groups of through holes matched with the first air duct or the second air duct are arranged on the air port switching plate.

[0027] The number of the through holes is equal to the number of the first air duct or the second air duct.

[0028] As a preferred technical solution of the present application, when the through hole in the air port switching plate is matched with the first air duct, the air flow sequentially passes through the main air duct unit, the through hole and is finally discharged from the first air duct.

[0029] When the through hole in the air port switching plate is matched with the second air duct, the air flow sequentially passes through the main air duct unit, the through hole, the connecting hole and is finally discharged from the air knife unit.

[0030] As a preferred technical solution of the present application, the upper end of the second air duct is provided with an inverted tapered groove at a position corresponding to the connecting hole, and the inverted tapered groove is communicated with the connecting hole.

[0031] As a preferred technical solution of the present application, the position of bubble ejection in the bubble generating unit is located at the lower end of the lower end surface of the first air duct.

[0032] As a preferred technical solution of the present application, the inside of the laser cutting mechanism is further provided with a fan device, which is communicated with the upper end of the main air duct unit.

[0033] The present application has the following advantages:

[0034] 1. In the present application, by arranging the air duct assembly, the air knife unit and the bubble generating unit, the vortex and turbulent flow interference in the laser cutting process is effectively reduced, and through the action of the grid and the micro-bubbles, the air flow is finely processed, so that the stability of the laser focal point is maintained, and the problems of inconsistent cutting depth, trajectory error and material deformation caused by air flow disturbance are avoided, the uniformity and stability of the air flow are significantly improved, and the high precision and high stability of the die cutting process are ensured.

[0035] 2. In the present application, the air flow path can be flexibly switched by the air port switching assembly, and the air flow is guided to the first air duct or the second air duct respectively, which ensures precise control of air flow during laser cutting. When the cutting demand changes, the air flow direction can be quickly adjusted to optimize the cooling effect of the air knife array, further improve the adaptability and processing efficiency of the equipment, and ensure efficient cutting and stable performance of different types of adhesive packaging materials during laser die cutting. BRIEF DESCRIPTION OF DRAWINGS

[0036] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments thereof, and explain the principles of the present application, and do not constitute a limitation of the present application.

[0037] In the drawings:

[0038] Figure 1 is a schematic diagram of the overall structure of the present application.

[0039] Figure 2 is another schematic diagram of the structure of the present application.

[0040] Figure 3 is a schematic diagram of the installation structure of the air duct assembly.

[0041] Figure 4 is a schematic diagram of the structure of the air duct assembly.

[0042] Figure 5 is Figure 4 is a partial enlarged schematic view of A in the present application.

[0043] Figure 6 is a schematic diagram of the structure of the secondary air duct unit.

[0044] Figure 7 is another schematic diagram of the structure of the air duct assembly.

[0045] Figure 8 is a sectional view of the main air duct unit and the secondary air duct unit at the vertical grid plate.

[0046] Figure 9 is an exploded structural schematic diagram of the air duct assembly.

[0047] In the figure: 1, laser cutting mechanism; 11, moving assembly; 12, cutting support frame; 13, cutting unit; 2, air duct assembly; 21, main air duct unit; 211, first partition plate; 212, air duct passage; 22, auxiliary air duct unit; 221, second partition plate; 222, first air duct; 223, second air duct; 2231, connecting hole; 2232, inverted conical groove; 3, air duct support frame; 4, air port switching assembly; 41, air port switching plate; 411, through hole; 42, outer gear ring; 43, drive gear; 44, drive unit; 5, first grating unit; 51, first annular grating plate; 52, first vertical grating plate; 6, second grating unit; 61, second annular grating plate; 62, second vertical grating plate; 7, air knife unit; 8, bubble generating unit. DETAILED DESCRIPTION

[0048] The technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0049] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0050] Embodiment one

[0051] As Figures 1-6As shown, a kind of laser die cutting device of adhesive packaging material, including laser cutting mechanism 1, the laser cutting mechanism 1 including moving assembly 11, cutting support frame 12 being arranged on the moving assembly 11 and cutting unit 13 being fixedly arranged on the cutting support frame 12;The upper end of the cutting unit 13 is provided with air duct assembly 2, and the air duct assembly 2 is fixed on the cutting support frame 12 by air duct support frame 3;The air duct assembly 2 includes main air duct unit 21 and vice air duct unit 22 arranged in sequence from top to bottom, and air port switching assembly 4 is further arranged between the main air duct unit 21 and vice air duct unit 22;The inside of the main air duct unit 21 is provided with first grid unit 5;The vice air duct unit 22 is provided with a plurality of groups of second partition plates 221 along the circumferential direction thereof, and the plurality of groups of second partition plates 221 separate the vice air duct unit 22 into a plurality of groups of first air ducts 222 and second air ducts 223, and the first air ducts 222 and the second air ducts 223 are arranged at intervals;The inside of the first air duct 222 is provided with the second grid unit 6, and the lower end of the second air duct 223 is connected with the air knife unit 7;The outside of the vice air duct unit 22 is further provided with a plurality of groups of bubble generating units 8 arranged in annular form.

[0052] In the prior art, the material surface is often deformed and heat is accumulated due to airflow turbulence during laser die cutting, which affects cutting accuracy. The traditional air duct system adopts a single cooling mode and cannot dynamically adjust airflow distribution according to working conditions, resulting in local overheating or insufficient cooling. The existing device lacks effective control over the airflow boundary layer, and small-scale turbulence easily causes laser focal point deviation, causing cutting trajectory error.

[0053] To solve the above problems, a layered air duct structure is adopted to realize functional partitioning according to different requirements of uniform cooling and local strong cooling.

[0054] Among them, the main air duct unit 21 refers to a structure with a vertical airflow channel, which can be realized by combining multiple layers of annular grid plates and vertical grid plates, for example, to straighten the initial airflow. The vice air duct unit 22 refers to a ring structure with alternating functional partitions, which can be formed by circumferentially distributed partition plates to realize differential control of airflow paths. The second partition plate 221 refers to an isolation member extending along the circumferential direction, which can be vertically installed by using an arc-shaped metal plate to form independently arranged air duct spaces. The first grid unit 5 refers to an airflow straightening device, which can also be a honeycomb metal mesh structure for eliminating large-scale vortex. The air knife unit 7 generates directional high-pressure airflow, and the bubble generating unit 8 refers to a micro-bubble generating device, which can be a ceramic nano-pore generator to disturb the airflow boundary layer by releasing micron-sized bubbles.

[0055] Specifically, the main air duct unit 21 receives the airflow from the air blower, and the airflow is first rectified by the first grid unit 5 to eliminate large-scale vortexes. When the airflow enters the secondary air duct unit 22, it is separated into a plurality of first air ducts 222 and second air ducts 223 by the second partition plate 221. The second grid unit 6 in the first air duct 222 performs secondary refinement on the airflow to form uniformly distributed cooling airflow. The second air duct 223 guides the airflow to the air knife unit 7 to form a high-pressure linear airflow for local strong cooling. The air outlet switching assembly 4 selects the communication state of the main air duct unit 21 and different secondary air ducts by adjusting the position of the through hole 411. When uniform cooling is needed, the airflow is discharged through the first air duct 222; when local strong cooling is needed, the airflow is switched to the second air duct 223 and output through the air knife unit 7. The bubble generating unit 8 arranged in a ring continuously releases microbubbles to disturb the airflow boundary layer outside the secondary air duct and suppress the influence of small-scale turbulence on the laser focal point.

[0056] Further, as shown in Figure 5 The main air duct unit 21 is internally provided with a plurality of groups of first partition plates 211 corresponding to the second partition plate 221 one by one.

[0057] The plurality of groups of first partition plates 211 divide the interior of the main air duct unit 21 into a plurality of groups of air duct passages 212, and the air duct passages 212 are correspondingly arranged with the first air ducts 222 or the second air ducts 223.

[0058] The first partition plate 211 is a plate-shaped structure extending axially along the interior of the main air duct unit 21, which can be made of stainless steel or aluminum alloy and is fixed on the inner wall of the main air duct unit 21 by welding or bolts. This structure is used to divide the main air duct unit 21 into a plurality of independent passages to ensure that the airflow path is continuously aligned with the second partition plate 221 of the secondary air duct unit 22.

[0059] The air duct passage 212 is an independent airflow passage formed by the first partition plate 211 in the interior of the main air duct unit 21. The passage with different cross-sectional areas can be formed by adjusting the distance and number of partition plates. This structure allows the airflow in the main air duct unit 21 to be distributed to the corresponding area of the secondary air duct unit 22 along the preset path, avoiding the cross interference between airflows of different functional air ducts.

[0060] Specifically, the position of the first partition plate 211 has a spatial correspondence relationship with the second partition plate 221 of the secondary air duct unit 22, so that the independent air duct passages 212 formed by the division of the primary air duct unit 21 respectively form continuous passages with the first air duct 222 or the second air duct 223 of the secondary air duct unit 22. When the airflow enters from the primary air duct unit 21, the first partition plate 211 guides the airflow to flow along the independent passage and is directly introduced into the corresponding area of the secondary air duct unit 22 through the alignment structure with the second partition plate 221. This design eliminates the airflow path misalignment at the connection between the primary and secondary air ducts, prevents local vortex and uneven pressure distribution caused by sudden change of passage cross section, and at the same time, the corresponding arrangement of the independent air duct passages 212 with the first air duct 222 or the second air duct 223 enables the airflow to be accurately distributed to the grid unit or the air knife unit 7 according to the functional requirements, avoiding interference between airflows of different cooling modes.

[0061] Further, as shown in Figure 5 The first grid unit 5 includes a plurality of groups of annularly arranged first annular grid plates 51 and a plurality of groups of first vertical grid plates 52 arranged perpendicularly to the first annular grid plates 51.

[0062] The second grid unit 6 includes a plurality of groups of annularly arranged second annular grid plates 61 and a plurality of groups of second vertical grid plates 62 arranged perpendicularly to the second annular grid plates 61.

[0063] The plurality of groups of annular grid plates and vertical grid plates divide the interior of the primary air duct unit 21 and the interior of the first air duct 222 into a plurality of ventilation holes.

[0064] The first annular grid plate 51 is a metal partition plate arranged in concentric circles around the central axis of the primary air duct, which can be formed by punching a stainless steel sheet. The annular arrangement structure can guide the airflow to diffuse uniformly in the circumferential direction. The first vertical grid plate 52 is a vertical partition plate extending radially along the primary air duct, which can be realized by cutting a stainless steel sheet or an aluminum alloy profile. The vertical arrangement can realize radial layered flow guiding of the airflow. The second annular grid plate 61 is a concentric circular flow dividing structure arranged inside the first air duct 222. The reduced annular spacing can perform secondary rectification of the airflow. The orthogonal arrangement of the second vertical grid plate 62 and the second annular grid plate can further refine the airflow path. The ventilation hole is a regular airflow passage formed by the intersecting grid, which can be realized by adjusting the grid spacing to control the aperture size.

[0065] Specifically, the main air duct unit 21 is internally formed with a multi-level grid structure through the vertical intersection of the first annular grid plate 51 and the first vertical grid plate 52, the annularly arranged grid plates constrain the airflow to be uniformly distributed in the circumferential direction, the vertically arranged grid plates force the airflow to flow in the radial direction in layers, and the orthogonal combination of the two divides the main air duct into uniformly distributed ventilation holes, effectively decomposes large-scale vortexes, and the first air duct 222 is internally formed with a secondary grid structure through the second annular grid plate 61 and the second vertical grid plate 62, the secondary rectification of the airflow that has been preliminarily processed by the main air duct is performed by the grid spacing that is reduced, and the residual turbulent energy is eliminated, and the grid systems of the main air duct and the first air duct 222 form a gradient airflow regulation mechanism, the annular grid guides the circumferential diffusion of the airflow, and the vertical grid implements axial layering, and the synergistic effect of the two causes the airflow to gradually realize laminarization transition when passing through the double-layer grid, and finally forms a stable and uniform airflow field, avoiding the material resonance effect caused by local airflow disturbance.

[0066] Further, as shown in Figure 8 the thickness of the first vertical grid plate 52 and the second vertical grid plate 62 gradually increases from top to bottom, and the hole diameter of the ventilation hole at the lower end of the main air duct unit 21 is greater than the hole diameter of the ventilation hole at the upper end of the first air duct 222.

[0067] Among them, the gradually increasing thickness of the first vertical grid plate 52 from top to bottom means that the grid plate forms a tapered flow guide channel in the vertical direction, and the linear flow of the airflow is guided by the thickness gradient change, the thickness variation rule of the second vertical grid plate 62 is the same as that of the first vertical grid plate 52, and the continuity of the airflow between the main air duct and the first air duct 222 is ensured, and the hole diameter of the ventilation hole at the lower end of the main air duct unit 21 is greater than the hole diameter of the ventilation hole at the upper end of the first air duct 222, which means that a diffusion buffer area is formed at the connection between the two air ducts, which can be specifically realized by cooperating the flared structure at the end of the main air duct with the constricted structure at the inlet of the first air duct 222, and the pressure difference generated by the difference in hole diameter is used to suppress vortex generation, and it is also convenient for the normal passage of the airflow.

[0068] Specifically, although the airflow first enters the through hole 411 from the main air duct unit 21 and then enters the first air duct 222, when the high-speed airflow in the main air duct unit 21 passes through the tapered flow guide channel, the grid plate with gradually increasing thickness forces the airflow to be laminarized, and the kinetic energy of the turbulent flow is reduced, and when the airflow enters the flared area at the end of the main air duct, the local pressure difference generated by the constricted structure at the inlet of the first air duct 222 promotes smooth transition of the airflow, avoiding sudden change of speed, and the difference in hole diameter at the connection between the two air ducts eliminates the boundary layer separation phenomenon caused by the traditional equal-diameter connection, cutting off the energy input condition required for vortex regeneration, and the stability of the airflow delivery can be ensured.

[0069] Further, as shown in Figure 6As shown, the second air duct 223 is internally provided with a connecting hole 2231 connected with the air knife unit 7.

[0070] The connecting hole 2231 can be a straight-through hole structure, and its axis is consistent with the extension direction of the second air duct 223, so as to shorten the airflow transmission path. The hole reduces the airflow resistance by reducing the bending and shunting links, thereby improving the air pressure stability of the air knife unit 7.

[0071] Further, as shown in the figure, Figures 7-9 The air port switching assembly 4 comprises:

[0072] The air port switching plate 41 is rotationally arranged between the main air duct unit 21 and the auxiliary air duct unit 22;

[0073] The outer gear ring 42 is fixedly arranged on the outer side of the air port switching plate 41;

[0074] The drive gear 43 is in transmission with the outer gear ring 42 and in transmission connection with the drive unit 44, and the drive unit 44 is fixedly arranged on the air duct support frame 3.

[0075] The air port switching plate 41 is a ring-shaped rotating component with a through hole 411, which can be realized by processing a stainless steel or aluminum alloy plate. The number of through holes 411 matches the number of air ducts. The rotation angle controls the conduction state of the air duct. The outer gear ring 42 is a gear structure fixed on the outer edge of the air port switching plate 41, which is used to transmit the rotary motion of the drive gear 43 to the air port switching plate 41. The drive gear 43 is a transmission component meshing with the outer gear ring 42, which can be driven by a servo motor or a stepper motor to realize precise angle adjustment of the air port switching plate 41.

[0076] Specifically, the air port switching plate 41 is rotationally arranged between the main air duct unit 21 and the auxiliary air duct unit 22, and the through holes 411 are distributed corresponding to the air duct passages 212. When the drive unit 44 is started, the drive gear 43 drives the outer gear ring 42 to rotate, so that the air port switching plate 41 rotates around the axis, and the through holes 411 are aligned with different air ducts through the rotating action, realizing the selective communication of the main air duct unit 21 with the first air duct 222 or the second air duct 223. The meshing transmission between the outer gear ring 42 and the drive gear 43 ensures the switching angle accuracy, avoids the air duct misalignment caused by mechanical clearance, and eliminates the structural deviation caused by vibration during transmission by fixing the drive unit 44 to the air duct support frame 3, thereby maintaining the repeated positioning accuracy of the switching action.

[0077] Further, as shown in the figure, Figure 9 The air port switching plate 41 is rotationally arranged between the main air duct unit 21 and the auxiliary air duct unit 22, and the through holes 411 are distributed corresponding to the air duct passages 212. When the drive unit 44 is started, the drive gear 43 drives the outer gear ring 42 to rotate, so that the air port switching plate 41 rotates around the axis, and the through holes 411 are aligned with different air ducts through the rotating action, realizing the selective communication of the main air duct unit 21 with the first air duct 222 or the second air duct 223. The meshing transmission between the outer gear ring 42 and the drive gear 43 ensures the switching angle accuracy, avoids the air duct misalignment caused by mechanical clearance, and eliminates the structural deviation caused by vibration during transmission by fixing the drive unit 44 to the air duct support frame 3, thereby maintaining the repeated positioning accuracy of the switching action.

[0078] The number of through holes 411 is equal to the number of first air ducts 222 or second air ducts 223.

[0079] The through hole 411 refers to an air flow passage through the air port switching plate 41, and the hole edge is provided with a chamfer or a flow guide surface to reduce air flow resistance. The through hole 411 is aligned with the axis of the air duct, ensuring the continuity of the air flow path during switching.

[0080] Specifically, when the air port switching plate 41 rotates to the target position, the axis of the through hole 411 coincides with the axis of the corresponding air duct inlet, and the air flow of the main air duct unit 21 is directly injected into the target air duct through the through hole 411. The edge of the through hole 411 forms a sealing contact surface with the air duct inlet, preventing air flow from leaking to adjacent air ducts. Since the number of through holes 411 strictly matches the number of air ducts, there is always a complete air flow passage during switching, avoiding instantaneous air flow interruption or pressure fluctuations. This structure eliminates air flow crosstalk between different air ducts during switching by physical isolation, ensuring that the instantaneous accuracy of air flow direction switching is controlled within ±0.5 millimeters.

[0081] Further, as shown in Figures 1-9 When the through hole 411 in the air port switching plate 41 is connected to the first air duct 222, the air flow sequentially passes through the main air duct unit 21, the through hole 411, and finally exits from the first air duct 222;

[0082] When the through hole 411 in the air port switching plate 41 is connected to the second air duct 223, the air flow sequentially passes through the main air duct unit 21, the through hole 411, the connecting hole 2231, and finally exits from the air knife unit 7.

[0083] Specifically, when uniform cooling is required in the conventional cutting condition, the air port switching plate 41 is rotated to align the through hole 411 with the first air duct 222, and the air flow of the main air duct unit 21 directly enters the first air duct 222 through the through hole 411. At this time, the air flow is uniformly dispersed through the grid structure, combined with the micro-bubble disturbance generated by the bubble generating unit 8, to eliminate vortex and form stable laminar flow, covering the material surface for large-area heat dissipation.

[0084] When high-precision cutting requires local intensified cooling, the air port switching plate 41 is rotated to align the through hole 411 with the second air duct 223, and the air flow enters the air knife unit 7 through the connecting hole 2231 to form a high-speed air flow beam, which precisely acts on the laser focal point area and quickly carries away high heat load.

[0085] During the switching process of the two modes, the complete connection of the through hole 411 and the air duct avoids air flow leakage, and the continuous action of the air port switching plate 41 ensures that there is no air flow interruption during the switching process.

[0086] Further, as shown in Figure 6As shown, the upper end of the second air duct 223 is provided with an inverted tapered slot 2232 at the position corresponding to the connecting hole 2231, which is in communication with the connecting hole 2231. The inverted tapered slot 2232 can be formed on the inner wall of the second air duct 223 by machining or casting process, and the taper angle range can be, for example, 15-60 degrees. This structure guides the airflow to accelerate smoothly through the tapered geometry, and reduces the fluid separation effect caused by sudden changes in cross section.

[0087] Further, as shown in the figure, Figures 7-9 The bubble ejection position in the bubble generating unit 8 is located at the lower end of the lower end surface of the first air duct 222, which can ensure that the bubbles form a disturbance layer before the airflow reaches the material surface.

[0088] Further, the laser cutting mechanism 1 is also provided with a fan device, which is in communication with the upper end of the main air duct unit 21.

[0089] The fan device is the power source for driving the airflow circulation, which can be realized by a centrifugal fan (not shown in the specific structure diagram), and its air outlet is in communication with the top of the main air duct unit 21 to form a directional airflow path. This device ensures the stability of the pressure gradient in the main and auxiliary air ducts by forced airflow circulation.

[0090] Working process:

[0091] Place and fix the adhesive tape packaging material to be cut on the work station, and set the laser parameters and cutting conditions in the control system;

[0092] Start the fan device, and make the fan device output airflow to the main air duct unit 21. The first grid unit 5 in the main air duct unit 21 performs primary rectification on the airflow to eliminate large-scale vortex. The airflow is guided by the first partition plate 211 to the corresponding first air duct 222 or second air duct 223 inlet direction according to the preset distribution;

[0093] According to the control system setting (uniform cooling or local strong cooling), the driving unit 44 drives the air outlet switching plate 41 of the air outlet switching assembly 4 to rotate to a predetermined angle. The air outlet switching plate 41 makes the through hole 411 on it aligned with the target first air duct 222 or second air duct 223, so as to select the output path of the airflow;

[0094] Mode A, when the air port switching plate 41 of the air port switching assembly 4 is rotated to align the through hole 411 with the first air duct 222, the airflow is sequentially discharged from the main air duct unit 21, the through hole 411, and finally from the first air duct 222, the airflow is further refined by the second grid unit 6 after entering the first air duct 222, forming a uniformly distributed cooling airflow, the micron-sized bubbles released by the bubble generating unit 8 at the lower end of the first air duct 222 end face, the micro-bubbles disturb and homogenize the airflow, the airflow further eliminates residual vortices and forms a stable laminar flow, covering the material surface for large-area heat dissipation, under the above uniform cooling conditions, the laser cutting mechanism 1 is started to work;

[0095] Mode B, when the air port switching plate 41 of the air port switching assembly 4 is rotated to align the through hole 411 with the second air duct 223, the airflow is sequentially discharged from the main air duct unit 21, the through hole 411, the connecting hole 2231, and finally from the air knife unit 7, the airflow enters the air knife unit 7 connected through the connecting hole 2231, the air knife unit 7 generates directional high-pressure airflow, the second air duct 223 guides the airflow to the air knife unit 7, forming a high-pressure linear airflow for local strong cooling, the high-speed airflow beam output by the air knife unit 7 precisely acts on the laser focal point area of the laser cutting mechanism 1 or the local area of the material being cut, quickly taking away the high heat load, thereby realizing local intensive cooling and reducing local thermal deformation during laser cutting.

[0096] Finally, it should be noted that the above-described only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it still can be modified to the technical solutions recorded in the foregoing embodiments, or equivalent replacement of some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A laser die-cutting device for self-adhesive packaging materials, characterized in that, include: The laser cutting mechanism (1) includes a moving component (11), a cutting support frame (12) disposed on the moving component (11), and a cutting unit (13) fixedly disposed on the cutting support frame (12). The upper end of the cutting unit (13) is provided with an air duct assembly (2), and the air duct assembly (2) is fixed on the cutting support frame (12) by an air duct support frame (3); The air duct assembly (2) includes a main air duct unit (21) and a secondary air duct unit (22) arranged sequentially from top to bottom. An air outlet switching assembly (4) is also provided between the main air duct unit (21) and the secondary air duct unit (22). The main air duct unit (21) is provided with a first grille unit (5) inside; The secondary air duct unit (22) is provided with several sets of second partition plates (221) along its circumference. The multiple sets of partition plates divide the secondary air duct unit (22) into several sets of first air ducts (222) and second air ducts (223). The first air ducts (222) and the second air ducts (223) are arranged at intervals. The first air duct (222) is provided with a second grille unit (6), and the lower end of the second air duct (223) is connected to an air knife unit (7). The outer side of the secondary air duct unit (22) is also provided with several sets of ring-arranged bubble generating units (8). The first grid unit (5) includes several sets of first annular grid plates (51) arranged in a ring and several sets of first vertical grid plates (52) arranged perpendicular to the first annular grid plates (51). The second grid unit (6) includes several sets of second annular grid plates (61) arranged in a ring and several sets of second vertical grid plates (62) arranged perpendicular to the second annular grid plates (61). The thickness of the first vertical grid plate (52) and the second vertical grid plate (62) gradually increases from top to bottom; The position where the bubble is ejected in the bubble generating unit (8) is located at the lower end of the lower end face of the first air duct (222).

2. The laser die-cutting device for self-adhesive packaging materials according to claim 1, characterized in that, The main air duct unit (21) is provided with several sets of first partition plates (211) that correspond one-to-one with the second partition plate (221). Several sets of first partition plates (211) divide the interior of the main air duct unit (21) into several sets of air duct channels (212), and the air duct channels (212) are correspondingly set with the first air duct (222) or the second air duct (223).

3. The laser die-cutting device for self-adhesive packaging materials according to claim 2, characterized in that, The several sets of annular and vertical grille plates divide the interior of the main air duct unit (21) and the interior of the first air duct (222) into several ventilation holes.

4. The laser die-cutting device for self-adhesive packaging materials according to claim 3, characterized in that, The diameter of the lower end of the ventilation hole in the main air duct unit (21) is larger than the diameter of the upper end of the ventilation hole in the first air duct (222).

5. The laser die-cutting device for self-adhesive packaging materials according to claim 1, characterized in that, The second air duct (223) has a connection hole (2231) inside that connects to the air knife unit (7).

6. The laser die-cutting device for self-adhesive packaging materials according to claim 5, characterized in that, The air outlet switching component (4) includes: The air outlet switching plate (41) is rotatably disposed between the main air duct unit (21) and the secondary air duct unit (22); The outer gear ring (42) is fixedly installed on the outside of the air outlet switching plate (41); The drive gear (43) is driven by the external gear ring (42) and connected to the drive unit (44), which is fixedly mounted on the air duct support frame (3).

7. The laser die-cutting device for self-adhesive packaging materials according to claim 6, characterized in that, The air outlet switching plate (41) is provided with a number of through holes (411) that cooperate with the first air duct (222) or the second air duct (223). The number of through holes (411) is equal to the number of the first air duct (222) or the second air duct (223).

8. The laser die-cutting device for self-adhesive packaging materials according to claim 7, characterized in that, When the through hole (411) in the air outlet switching plate (41) is connected to the first air duct (222), the airflow sequentially flows along the main air duct unit (21), through hole (411) and finally exits from the first air duct (222); When the through hole (411) in the air outlet switching plate (41) is connected to the second air duct (223), the airflow sequentially flows along the main air duct unit (21), through hole (411), connecting hole (2231) and finally exits from the air knife unit (7).

9. The laser die-cutting device for self-adhesive packaging materials according to claim 5, characterized in that, The upper end of the second air duct (223) is provided with an inverted conical groove (2232) at the position corresponding to the connecting hole (2231), and the inverted conical groove (2232) is connected to the connecting hole (2231).

10. The laser die-cutting device for self-adhesive packaging materials according to claim 1, characterized in that, The laser cutting mechanism (1) is also equipped with a fan device inside, which is connected to the upper end of the main air duct unit (21).

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