Laser die cutting device for non-setting adhesive packaging material

Abstract

The invention discloses a non-setting adhesive packaging material laser die cutting device, and relates to the technical field of laser die cutting, the non-setting adhesive packaging material laser die cutting device comprises a laser cutting mechanism, and the laser cutting mechanism comprises a moving assembly, a cutting support frame and a cutting unit; the air duct assembly is fixed to the cutting supporting frame through an air duct supporting frame. The air duct assembly comprises a main air duct unit and an auxiliary air duct unit which are sequentially arranged from top to bottom, and an air opening switching assembly is further arranged between the main air duct unit and the auxiliary air duct unit. The auxiliary air duct unit is provided with a plurality of sets of second partition plates in the circumferential direction of the auxiliary air duct unit. The multiple sets of partition plates divide the auxiliary air duct unit into a plurality of sets of first air ducts and second air ducts. A second grating unit is arranged in the first air duct, and the lower end of the second air duct is connected with an air knife unit; a plurality of groups of bubble generating units which are annularly arranged are further arranged on the outer side of the auxiliary air duct unit; the uniformity and stability of airflow are remarkably improved, and high precision and high stability in the die cutting process are ensured.

Description

Technical Field

[0001] This invention relates to the field of laser die-cutting technology, specifically to a laser die-cutting device for self-adhesive packaging materials. Background Technology

[0002] Self-adhesive packaging materials, also known as self-adhesive label materials, are composite materials made of paper, film, or other special materials as the face stock, coated with adhesive on the back, and with glassine paper as the backing paper. After processing such as printing and die-cutting, they become finished self-adhesive packaging materials. They have advantages such as not needing to apply glue, paste, or water, being pollution-free, and saving labeling time. They have a wide range of applications and are convenient and fast. Laser die-cutting uses a high-energy, high-density laser beam to move rapidly according to a designed pattern, instantly heating the die-cutting material to its vaporization temperature, thereby obtaining continuous or intermittent cuts and indentations.

[0003] In the laser die-cutting process of self-adhesive packaging materials, when the laser irradiates the material surface, it causes local heat accumulation, which in turn causes micro-deformations such as softening, bulging, and micro-warping. These deformations are particularly significant in some composite materials. At the same time, under the action of air-cooled airflow, especially the pulsed airflow or small-scale eddies generated when the airflow is turbulent or the air duct is poorly designed, these micro-deformations can be amplified and may trigger a resonance effect in the material. This resonance not only causes continuous micro-displacement or edge warping of the material, but also causes the laser focus position to shift, changing the focal length and further affecting the interaction between the laser beam and the material interface, thus producing irregular cutting depth and trajectory errors. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a laser die-cutting device for self-adhesive packaging materials.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] This invention provides a laser die-cutting device for self-adhesive packaging materials, comprising:

[0007] A laser cutting mechanism, comprising a movable component, a cutting support frame disposed on the movable component, and a cutting unit fixedly disposed on the cutting support frame;

[0008] The upper end of the cutting unit is provided with an air duct assembly, which is fixed on the cutting support frame by an air duct support frame.

[0009] The air duct assembly includes a main air duct unit and a secondary air duct unit arranged sequentially from top to bottom, and an air outlet switching component is also provided between the main air duct unit and the secondary air duct unit.

[0010] The main air duct unit is equipped with a first grille unit inside;

[0011] The secondary air duct unit is provided with several sets of second partition plates along its circumference. The multiple sets of partition plates divide the secondary air duct unit into several sets of first air ducts and second air ducts, with the first air ducts and second air ducts being spaced apart.

[0012] The first air duct is equipped with a second grille unit inside, and the lower end of the second air duct is connected to an air knife unit;

[0013] Several sets of bubble generating units arranged in a ring are also provided on the outside of the secondary air duct unit.

[0014] As a preferred technical solution of the present invention, the main air duct unit is provided with a plurality of first partition plates that correspond one-to-one with the second partition plate;

[0015] Several sets of first partition plates divide the interior of the main air duct unit into several sets of air duct channels, and the air duct channels are arranged corresponding to the first air duct or the second air duct.

[0016] As a preferred technical solution of the present invention, the first grid unit includes a plurality of groups of first annular grid plates arranged in a ring and a plurality of groups of first vertical grid plates arranged perpendicular to the first annular grid plates.

[0017] The second grid unit includes several sets of second annular grid plates arranged in a ring and several sets of second vertical grid plates arranged perpendicular to the second annular grid plates;

[0018] The several sets of annular and vertical grille plates divide the interior of the main air duct unit and the interior of the first air duct into several ventilation holes.

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

[0020] As a preferred embodiment of the present invention, the diameter of the lower end of the ventilation hole in the main air duct unit is larger than the diameter of the upper end of the ventilation hole in the first air duct.

[0021] As a preferred embodiment of the present invention, the second air duct has a connection hole inside that connects to the air knife unit.

[0022] As a preferred embodiment of the present invention, the air vent switching component includes:

[0023] The air outlet switching plate is rotatably mounted between the main air duct unit and the secondary air duct unit;

[0024] The outer gear ring is fixedly installed on the outside of the air outlet switching plate;

[0025] The drive gear is driven by the external gear ring and connected to the drive unit, which is fixedly mounted on the duct support frame.

[0026] As a preferred technical solution of the present invention, the air outlet switching plate is provided with a plurality of through holes that cooperate with the first air duct or the second air duct.

[0027] The number of 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 invention, when the through hole in the air outlet switching plate is connected to the first air duct, the airflow sequentially follows the main air duct unit, the through hole and finally exits from the first air duct.

[0029] When the through hole in the air outlet switching plate connects with the second air duct, the airflow sequentially flows along the main air duct unit, through the through hole, and connecting hole, and finally exits from the air knife unit.

[0030] As a preferred embodiment of the present invention, the upper end of the second air duct is provided with an inverted conical groove at the position corresponding to the connecting hole, and the inverted conical groove is connected to the connecting hole.

[0031] As a preferred embodiment of the present invention, the position where the bubbles are ejected in the bubble generating unit is located at the lower end of the lower end face of the first air duct.

[0032] As a preferred embodiment of the present invention, the laser cutting mechanism is further provided with a fan device inside, and the fan device is connected to the upper end of the main air duct unit.

[0033] The beneficial effects of this invention are:

[0034] 1. By setting up an air duct assembly, an air knife unit, and a bubble generating unit, the present invention effectively reduces the interference of eddy currents and turbulence in the airflow during laser cutting. Through the action of the grid and microbubbles, the airflow is refined, thereby maintaining the stability of the laser focus and avoiding problems such as inconsistent cutting depth, trajectory error, and material deformation caused by airflow disturbance. The uniformity and stability of the airflow are significantly improved, ensuring high precision and high stability in the die-cutting process.

[0035] 2. In this invention, the air duct unit can flexibly switch the airflow path through the air outlet switching component, guiding the airflow to the first air duct or the second air duct respectively, ensuring precise control of airflow during laser cutting. When the cutting requirements change, the airflow direction can be quickly adjusted to optimize the cooling effect of the air knife array, further improving the adaptability and processing efficiency of the equipment, and ensuring efficient cutting and stable performance of different types of self-adhesive packaging materials in the laser die-cutting process. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0037] In the attached diagram:

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

[0039] Figure 2 This is another structural schematic diagram of the present invention.

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

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

[0042] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

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

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

[0045] Figure 8 This is a cross-sectional view of the main air duct unit and the secondary air duct unit at the vertical grille.

[0046] Figure 9 This is a schematic diagram of the exploded structure of the air duct assembly.

[0047] In the diagram: 1. Laser cutting mechanism; 11. Moving component; 12. Cutting support frame; 13. Cutting unit; 2. Air duct assembly; 21. Main air duct unit; 211. First partition plate; 212. Air duct channel; 22. Secondary 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 outlet switching assembly; 41. Air outlet switching plate; 411. Through hole; 42. External gear ring; 43. Drive gear; 44. Drive unit; 5. First grid unit; 51. First annular grid plate; 52. First vertical grid plate; 6. Second grid unit; 61. Second annular grid plate; 62. Second vertical grid plate; 7. Air knife unit; 8. Bubble generating unit. Detailed Implementation

[0048] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0049] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0050] Example 1

[0051] like Figures 1-6As shown, a laser die-cutting device for self-adhesive packaging materials includes a laser cutting mechanism 1. 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. An air duct assembly 2 is disposed at the upper end of the cutting unit 13, and the air duct assembly 2 is fixed to 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, and a spacer is also disposed between the main air duct unit 21 and the secondary air duct unit 22. Air outlet switching component 4; the main air duct unit 21 is provided with a first grille unit 5 inside; the secondary air duct unit 22 is provided with a number of second partition plates 221 along its circumference, and the multiple partition plates divide the secondary air duct unit 22 into a number of first air ducts 222 and second air ducts 223, with the first air ducts 222 and the second air ducts 223 spaced apart; the first air duct 222 is provided with a second grille unit 6 inside, 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 a number of annularly arranged bubble generating units 8.

[0052] In existing technologies, during laser die-cutting, airflow turbulence often causes micro-deformation and heat accumulation on the material surface, affecting cutting accuracy. Traditional air duct systems use a single cooling mode and cannot dynamically adjust the airflow distribution according to working conditions, resulting in local overheating or insufficient cooling. Existing devices lack effective control over the airflow boundary layer, and small-scale turbulence can easily cause laser focus shift, resulting in cutting trajectory errors.

[0053] To address the aforementioned issues, a layered air duct structure is adopted to achieve functional zoning, catering to the different needs of uniform cooling and localized intense cooling.

[0054] Among them, the main air duct unit 21 refers to a structure with a vertical airflow channel, which can be achieved by combining multi-layer annular grid plates and vertical grid plates to rectify the initial airflow. The secondary air duct unit 22 refers to an annular structure with alternating functional zones, which can be separated into different air ducts by circumferentially distributed partitions to achieve differentiated control of airflow paths. The second partition plate 221 refers to an isolation component extending along the circumferential direction, which can be vertically installed as an arc-shaped metal plate to form an independently spaced air duct. The first grid unit 5 refers to an airflow rectification device, which can also be a honeycomb metal mesh structure to eliminate large-scale eddies. The air knife unit 7 generates directional high-pressure airflow. The bubble generating unit 8 refers to a microbubble generating device, which can be a ceramic nanopore generator to disturb the airflow boundary layer by releasing micron-sized bubbles.

[0055] Specifically, after receiving the airflow from the fan, the main air duct unit 21 performs initial rectification through the first grid unit 5 to eliminate large-scale eddies. When the airflow enters the secondary air duct unit 22, it is divided into multiple 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 further refines the airflow to form a 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 localized strong cooling. The air outlet switching component 4 selects the connection state between the main air duct unit 21 and different secondary air ducts by adjusting the position of the through hole 411. When uniform cooling is required, the airflow is discharged through the first air duct 222; when localized strong cooling is required, the airflow is switched to the second air duct 223 and output through the air knife unit 7. The annularly arranged bubble generating unit 8 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 focus.

[0056] Furthermore, such as Figure 5 As shown, the main air duct unit 21 is provided with a number of first partition plates 211 that correspond one-to-one with the second partition plate 221.

[0057] 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 arranged with the first air duct 222 or the second air duct 223.

[0058] The first partition plate 211 is a plate-shaped structure that extends axially along the inside of the main air duct unit 21. It can be made of stainless steel or aluminum alloy and is fixed to the inner wall of the main air duct unit 21 by welding or bolting. This structure is used to divide the main air duct unit 21 into multiple independent channels 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 212 is an independent airflow channel formed inside the main air duct unit 21 by the first partition plate 211. Specifically, the channel with different cross-sectional areas can be formed by adjusting the spacing and number of partition plates. This structure enables the airflow of the main air duct unit 21 to be directionally distributed to the corresponding area of ​​the secondary air duct unit 22 according to a preset path, avoiding cross-interference of airflow between different functional air ducts.

[0060] Specifically, the position of the first partition plate 211 corresponds spatially to the second partition plate 221 of the secondary air duct unit 22, so that the independent air duct channel 212 formed by the division of the main air duct unit 21 forms a continuous channel 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 main air duct unit 21, the first partition plate 211 guides the airflow along the independent channel and directly guides it 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 misalignment of the airflow path at the connection between the main and secondary air ducts, and prevents local eddies and uneven pressure distribution caused by abrupt changes in the channel cross section. At the same time, the corresponding setting of the independent air duct channel 212 with the first air duct 222 or the second air duct 223 enables the airflow to be accurately distributed to the grille unit or the air knife unit 7 according to functional requirements, avoiding mutual interference between airflows of different cooling modes.

[0061] Furthermore, such as Figure 5 As shown, 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.

[0062] 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;

[0063] 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.

[0064] The first annular grille 51 is a metal partition plate arranged in concentric circles around the central axis of the main air duct. It can be made by stamping stainless steel sheet. Its annular arrangement can guide the airflow to diffuse evenly along the circumference. The first vertical grille 52 is a vertical partition plate that extends radially along the main air duct. It can be made by cutting stainless steel sheet or aluminum alloy profile. Its vertical arrangement can achieve radial stratified airflow guidance. The second annular grille 61 is a concentric circular diversion structure set inside the first air duct 222. Its reduced annular spacing can perform secondary rectification of the airflow. The orthogonal arrangement of the second vertical grille 62 and the second annular grille can further refine the airflow path. The ventilation hole is a regular airflow channel formed by the cross grille. It can be achieved by adjusting the grille spacing to control the hole size.

[0065] Specifically, the main air duct unit 21 has a multi-layered grid structure formed by the vertical intersection of the first annular grid plate 51 and the first vertical grid plate 52. The annular grid plates constrain the airflow to be evenly distributed along the circumference, while the vertical grid plates force the airflow to flow in layers along the radial direction. The orthogonal combination of the two divides the main air duct into evenly distributed ventilation holes, effectively decomposing large-scale eddies. The first air duct 222 has a secondary grid structure formed by the second annular grid plate 61 and the second vertical grid plate 62. The reduced grid spacing performs secondary rectification on the airflow that has been initially treated by the main air duct, eliminating residual turbulent energy. The grid system of the main air duct and the first air duct 222 forms a gradient airflow control mechanism. While the annular grid guides the airflow to diffuse circumferentially, the vertical grid implements axial layering. The synergistic effect of the two enables the airflow to gradually achieve laminar transformation when passing through the double-layer grid, ultimately forming a stable and uniform airflow field and avoiding material resonance effects caused by local airflow disturbances.

[0066] Furthermore, such as Figure 8 As shown, the thickness of the first vertical grille plate 52 and the second vertical grille plate 62 gradually increases from top to bottom, and 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.

[0067] The thickness of the first vertical grating plate 52 gradually increases from top to bottom, which means that the grating plate forms a gradually narrowing guide channel in the vertical direction. The linear flow of air is guided by the change in thickness gradient. The thickness variation of the second vertical grating plate 62 is the same as that of the first vertical grating plate 52, which ensures the continuity of airflow between the main air duct and the first air duct 222. The lower end aperture of the ventilation hole of the main air duct unit 21 is larger than the upper end aperture of the first air duct 222, which means that a diffusion buffer area is formed at the junction of the two air ducts. Specifically, this can be achieved by the combination of the flared structure at the end of the main air duct and the constricted structure at the inlet of the first air duct 222. The pressure difference generated by the aperture difference suppresses the generation of eddies and facilitates the normal passage of 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, the high-speed airflow in the main air duct unit 21 is forced into laminar flow by the gradually thickening grid plate when passing through the gradually narrowing guide channel, which reduces the turbulent kinetic energy. When the airflow enters the widened area at the end of the main air duct, the flow velocity decreases and a diffusion effect is formed. At this time, the local pressure difference generated by the narrowing structure at the inlet of the first air duct 222 promotes a smooth transition of the airflow and avoids sudden velocity changes. The aperture difference design at the junction of the two air ducts eliminates the boundary layer separation phenomenon caused by the traditional equal-diameter connection, cuts off the energy input conditions required for vortex regeneration, and can ensure the stability of airflow delivery.

[0069] Furthermore, such as Figure 6As shown, the second air duct 223 has a connection hole 2231 inside that connects to the air knife unit 7.

[0070] Specifically, the connecting hole 2231 can be implemented using a straight-through channel structure, with its axis aligned with the extension direction of the second air duct 223 to shorten the airflow transmission path. This channel reduces airflow resistance by minimizing bends and diversion points, thereby improving the air pressure stability of the air knife unit 7.

[0071] Furthermore, such as Figures 7-9 As shown, the air vent switching component 4 includes:

[0072] The air outlet switching plate 41 is rotatably disposed between the main air duct unit 21 and the secondary air duct unit 22;

[0073] The outer gear ring 42 is fixedly installed on the outside of the air outlet switching plate 41;

[0074] The drive gear 43 is driven by the external gear ring 42 and is connected to the drive unit 44, which is fixedly mounted on the air duct support frame 3.

[0075] Among them, the air outlet switching plate 41 refers to an annular rotating component with through holes 411, which can be made of stainless steel or aluminum alloy sheet. The number of through holes 411 matches the number of air ducts. The air duct conduction state is controlled by the rotation angle. The outer gear ring 42 refers to the gear structure fixed on the outer edge of the air outlet switching plate 41, which is used to transmit the rotational motion of the drive gear 43 to the air outlet switching plate 41. The drive gear 43 refers to the transmission component that meshes with the outer gear ring 42. It can be driven by a servo motor or a stepper motor to achieve precise angle adjustment of the air outlet switching plate 41.

[0076] Specifically, the air outlet switching plate 41 is rotatably positioned between the main air duct unit 21 and the secondary air duct unit 22, with its through holes 411 corresponding to the air duct channel 212. When the drive unit 44 is started, the drive gear 43 drives the outer gear ring 42 to rotate, causing the air outlet switching plate 41 to rotate around the axis. The through holes 411 align with different air ducts as the rotation occurs, achieving selective connection between the main air duct unit 21 and 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 accuracy of the switching angle and avoids air duct misalignment caused by mechanical clearance. The design of the drive unit 44 being fixed to the air duct support frame 3 eliminates structural displacement caused by vibration during transmission and maintains the repeatability and positioning accuracy of the switching action.

[0077] Furthermore, such as Figure 9 As shown, 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;

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

[0079] Among them, the through hole 411 refers to the airflow channel that passes through the air outlet switching plate 41. The edge of the hole is chamfered or has a guide surface to reduce airflow resistance. The through hole 411 is aligned with the axis of the air duct to ensure the continuity of the airflow path during the switching process.

[0080] Specifically, when the air outlet 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. The airflow 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 sealed contact surface with the air duct inlet, preventing the airflow from leaking to adjacent air ducts. Since the number of through holes 411 is strictly matched with the number of air ducts, there is always a complete airflow channel during the switching process, avoiding instantaneous airflow interruption or pressure fluctuation. This structure eliminates airflow crosstalk between different air ducts during switching through physical isolation, ensuring that the instantaneous accuracy of airflow direction switching is controlled within ±0.5 mm.

[0081] Furthermore, such as Figures 1-9 As shown, 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.

[0082] 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.

[0083] Specifically, when uniform cooling is required during normal cutting operations, the air outlet switching plate 41 rotates until the through hole 411 is aligned with the first air duct 222. The airflow of the main air duct unit 21 enters the first air duct 222 directly through the through hole 411. At this time, the airflow is evenly dispersed through the grid structure. Combined with the microbubble disturbance generated by the bubble generating unit 8, eddies are eliminated and a stable laminar flow is formed, covering the material surface for large-area heat dissipation.

[0084] When high-precision cutting requires localized enhanced cooling, the air outlet switching plate 41 rotates until the through hole 411 aligns with the second air duct 223. The airflow enters the air knife unit 7 through the connecting hole 2231 to form a high-speed airflow beam, which precisely acts on the laser focal area and quickly removes the high heat load.

[0085] During the switching between the two modes, the complete connection between the through hole 411 and the air duct prevents airflow leakage, and the continuous operation of the air outlet switching plate 41 ensures that there is no interruption of airflow during the switching process.

[0086] Furthermore, such as Figure 6As shown, the upper end of the second air duct 223 has an inverted conical groove 2232 at the position corresponding to the connecting hole 2231. The inverted conical groove 2232 is connected to the connecting hole 2231. The inverted conical groove 2232 can be formed on the inner wall of the second air duct 223 by machining or casting. Its conical angle range can be, for example, 15-60 degrees. This structure guides the airflow to accelerate smoothly through the gradually narrowing geometry, reducing the fluid separation effect caused by the abrupt change in cross-section.

[0087] Furthermore, such as Figures 7-9 As shown, the position where the bubbles are ejected in the bubble generating unit 8 is located at the lower end of the lower end face of the first air duct 222, which ensures that the bubbles form a disturbance layer before the airflow reaches the material surface.

[0088] Furthermore, 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.

[0089] The fan unit is the power source that drives the airflow circulation. Specifically, a centrifugal fan can be used (its specific structure is not shown in the diagram). Its air outlet is connected to 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 forcing airflow circulation.

[0090] Work process:

[0091] Place and fix the self-adhesive packaging material to be cut at the workstation, and set the laser parameters and cutting conditions in the control system.

[0092] Start the fan device to output airflow to the main air duct unit 21. The first grid unit 5 inside the main air duct unit 21 performs initial rectification of the airflow to eliminate large-scale eddies. Under the guidance of the first partition plate 211, the airflow is guided into the corresponding first air duct 222 or second air duct 223 inlet direction according to the preset distribution.

[0093] According to the control system settings (uniform cooling or local strong cooling), the drive unit 44 drives the air outlet switching plate 41 of the air outlet switching assembly 4 to rotate to a predetermined angle, so that the through hole 411 on the air outlet switching plate 41 is aligned with the target first air duct 222 or second air duct 223, thereby selecting the output path of the airflow.

[0094] In mode A, when the air outlet switching plate 41 of the air outlet switching component 4 rotates to align the through hole 411 with the first air duct 222, the airflow sequentially follows the main air duct unit 21, the through hole 411 and finally exits from the first air duct 222. After entering the first air duct 222, the airflow is further refined by the second grid unit 6 to form a uniformly distributed cooling airflow. The bubble generating unit 8 releases micron-sized bubbles at the lower end of the lower end face of the first air duct 222. The microbubbles disturb and homogenize the airflow, and the airflow further eliminates residual eddies 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] In Mode B, when the air outlet switching plate 41 of the air outlet switching assembly 4 rotates to align the through hole 411 with the second air duct 223, the airflow sequentially flows along the main air duct unit 21, through hole 411, and connecting hole 2231 and finally exits from the air knife unit 7. The airflow enters the air knife unit 7 connected to it 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 localized strong cooling. The high-speed airflow beam output by the air knife unit 7 precisely acts on the laser focal area of ​​the laser cutting mechanism 1 or the local area of ​​the material being cut, quickly removing the high heat load, thereby achieving localized enhanced cooling and reducing localized thermal deformation during laser cutting.

[0096] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser die-cutting device for self-adhesive packaging materials, characterized in that, include: A 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, and 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 a number of second partition plates (221) along its circumference. The multiple partition plates divide the secondary air duct unit (22) into a number 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); Several sets of bubble generating units (8) arranged in a ring are also provided on the outside of the secondary air duct unit (22).

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 internally 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 arranged corresponding to 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 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 annular and vertical grille plates of the group divide the interior of the main air duct unit (21) and the interior of the first air duct (222) into a number of ventilation holes.

4. The laser die-cutting device for self-adhesive packaging materials according to claim 3, characterized in that, The thickness of the first vertical grid plate (52) and the second vertical grid plate (62) gradually increases from top to bottom.

5. The laser die-cutting device for self-adhesive packaging materials according to claim 4, 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).

6. 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).

7. The laser die-cutting device for self-adhesive packaging materials according to claim 6, 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).

8. The laser die-cutting device for self-adhesive packaging materials according to claim 7, 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).

9. The laser die-cutting device for self-adhesive packaging materials according to claim 8, 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).

10. The laser die-cutting device for self-adhesive packaging materials according to claim 6, 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).

11. The laser die-cutting device for self-adhesive packaging materials according to claim 1, characterized in that, 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).

12. 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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