Laser drilling device based on plastic bag making machine

Abstract

The invention discloses a laser drilling device based on a plastic bag making machine. The laser drilling device comprises a first reciprocating mechanism, a gas conveying mechanism and a laser drilling mechanism. The first reciprocating mechanism drives the laser drilling mechanism to reciprocate; the laser drilling mechanism comprises a laser output head and a connecting sleeve, and an air inlet hole is formed in the surface of the connecting sleeve; an air guide cover is rotatably mounted in the connecting sleeve, and an airflow bin is formed between the inner wall of the air guide cover and the outer wall of the laser output head; the gas transmission mechanism comprises a servo motor and a gas bin, and the piston is installed in the gas bin in a sliding mode; the outer wall of the air bin is connected with an air inlet valve and an air outlet valve, and an air conveying pipe is connected between the air outlet valve and the air inlet hole. The equipment investment cost is reduced, the influence of smoke on laser beam energy is effectively avoided, and the laser drilling quality of the plastic bag in the production process is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of plastic product production, in particular to a laser punching device based on a plastic bag making machine. Background Art

[0002] Plastic bags are a kind of lightweight, durable and versatile packaging material made of plastic film. Plastic bag making machines are an automated equipment used to produce various plastic bags. Because plastic bags have different functions, plastic bag making machines also have some differences in structure.

[0003] Laser drilling of plastic bags is a technology that applies laser drilling technology to the production of plastic bags. It is mainly used to improve the air permeability of plastic bags or realize the specific functions of plastic bags. The principle is to use a high-energy laser beam generated by a laser to focus on the surface of the plastic bag through an optical system. The focused laser beam instantly vaporizes the surface material of the plastic bag, thereby forming tiny holes. Compared with traditional mechanical hole opening methods, it has the advantages of high efficiency, non-contact, high quality and high precision.

[0004] In the use of existing plastic bag making machines that use laser punching technology, laser punching is usually performed on the surface of the plastic film during the feeding stage, that is, before the plastic bag is formed and during the plastic film transmission process. However, if the density of holes to be formed is large, the area that can be covered by a single laser punching device is limited when performing continuous punching. For punching holes in larger plastic bags, it is easy to have the problem that a single laser punching device cannot fully cover the area. In addition, laser punching equipment is a high-precision equipment with a relatively high price. For small enterprises, adding multiple laser punching equipment for synchronous punching operations directly increases the equipment investment cost of the enterprise.

[0005] Secondly, laser drilling is essentially the use of heat to gasify plastic materials. During the drilling process, when heat accumulates on the surface of the plastic material, the plastic material will burn and produce drifting smoke. The smoke will have a significant impact on the energy of the laser beam. On the one hand, the particles in the smoke will absorb the laser energy, causing the energy of the laser beam to weaken; on the other hand, the particles in the smoke will scatter the laser beam, causing the laser beam to diffuse and the energy density to decrease. Both of the above situations will reduce the energy of the laser beam and affect the laser beam's drilling effect on the plastic surface. If the film used for plastic bags is thick, the laser beam after energy attenuation may not be able to quickly and comprehensively produce the required holes, resulting in blind holes, irregular holes and other problems, which directly affect the efficiency and quality of plastic bag drilling. Summary of the invention

[0006] The purpose of the present invention is to provide a laser punching device based on a plastic bag making machine to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a laser punching device based on a plastic bag making machine, comprising a first reciprocating mechanism, an air delivery mechanism and a laser punching mechanism;

[0008] The first reciprocating mechanism drives the laser punching mechanism to move reciprocatingly, and the feeding mechanism is arranged on one side of the bag making machine body;

[0009] The laser drilling mechanism comprises a laser output head and a connecting sleeve, wherein the connecting sleeve is arranged on the outer wall of the bottom end of the laser output head, and one or more air inlet holes are opened on the surface of the connecting sleeve;

[0010] An air guide cover is rotatably mounted inside the connecting sleeve, an air flow chamber is formed between the inner wall of the air guide cover and the outer wall of the laser output head, and the air flow chamber is connected to the air inlet hole;

[0011] A gas delivery mechanism is provided on one side of the laser drilling mechanism, and the gas delivery mechanism includes a servo motor and a gas chamber, the output end of the servo motor is connected to a screw, the surface of the screw is rotatably engaged with a piston, and the piston is slidably installed inside the gas chamber;

[0012] The outer wall of the gas bin is connected to one or more air inlet valves and one or more air exhaust valves, and an air pipe is connected between the exhaust valve and the air inlet hole.

[0013] Preferably, the first reciprocating mechanism comprises one or more first lead screws, a first slider and a first motor, the inner wall of the first slider is rotationally engaged with the surface of the first lead screw, and the output end of the first motor is connected to one end of the first lead screw;

[0014] Gears are provided at both ends of the first lead screw, and the gears between adjacent first lead screws are meshed;

[0015] The gas delivery mechanism and the laser drilling mechanism are both installed on the lower surface of the first sliding block.

[0016] Preferably, the gas delivery mechanism further includes a first controller, and a communication channel is constructed between the first controller and the servo motor.

[0017] Preferably, the laser drilling mechanism further includes a second controller, a communication channel is constructed between the second controller and the laser output head, and a communication channel is constructed between the second controller and the first controller.

[0018] Preferably, the number of the air intake valves is two, and the two air intake valves are distributed on the two end surfaces of the air bin;

[0019] The two air inlet valves are both one-way valves, and the outlets of the air inlet valves are located inside the air chamber.

[0020] Preferably, the number of the exhaust valves is two, and the two exhaust valves are distributed on the two end surfaces of the gas bin;

[0021] Both exhaust valves are one-way valves, and the inlets of the exhaust valves are located inside the air intake bin.

[0022] Preferably, the number of the air inlet hole and the air delivery pipe is two.

[0023] Preferably, it comprises a second reciprocating mechanism, the second reciprocating mechanism is connected to an air suction mechanism, and the second reciprocating mechanism drives the air suction mechanism to move reciprocally;

[0024] The air suction mechanism comprises an air collecting hood and a negative pressure pipe. The air collecting hood is located directly below the laser drilling mechanism, and the negative pressure pipe is connected to the inside of the air collecting hood.

[0025] Preferably, the second reciprocating mechanism comprises one or more second lead screws, a second slider and a second motor, the inner wall of the second slider is rotatably engaged with the surface of the second lead screw, and the output end of the second motor is connected to one end of the second lead screw;

[0026] Gears are provided at both ends of the second lead screw, and the gears between adjacent second lead screws are meshed;

[0027] The air suction mechanism is installed on the upper surface of the second sliding block.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention achieves the effect of reducing equipment investment costs while ensuring the punching efficiency through the first reciprocating mechanism. The single laser punching mechanism is driven by the first reciprocating mechanism to meet the continuous punching operation on the surface of large-sized plastic bags. On the one hand, the efficiency of continuous punching is guaranteed, and on the other hand, the investment cost of the equipment is reduced, which is beneficial to the operation of small enterprises.

[0030] 2. The present invention achieves the effect of preventing smoke from affecting the energy of the laser beam through the gas supply mechanism and the gas guide hood. The gas supply mechanism can synchronously supply gas according to the frequency and hole spacing of laser drilling, and can blow away the smoke in the laser beam irradiation area, effectively avoiding the influence of smoke on the laser beam energy and ensuring the quality of laser drilling.

[0031] 3. The present invention achieves the effect of fully absorbing smoke by setting up a second reciprocating mechanism and an air suction mechanism. The air suction mechanism moves through the second reciprocating mechanism and keeps running synchronously with the laser drilling mechanism. After the holes are formed on the plastic surface, the negative pressure generated by the negative pressure tube sucks the smoke generated around the holes into the gas collecting hood through the holes. On the one hand, it reduces the smoke in the working area of ​​the laser drilling mechanism, and on the other hand, it can also harmlessly treat the inhaled smoke, improve the air quality in the processing area, and reduce the negative impact of the smoke on the health of the workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the installation position structure of the gas delivery mechanism and the laser drilling mechanism in the first embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the appearance structure of the gas delivery mechanism and the laser drilling mechanism in the first embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of the exploded structure of the gas delivery mechanism and the laser drilling mechanism components in the first embodiment of the present invention;

[0035] Figure 4 It is a schematic cross-sectional structure diagram of the air guide cover in the first embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the cross-sectional structure of the gas chamber in the first embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the distribution of the gas delivery pipe and the exhaust valve in the first embodiment of the present invention;

[0038] Figure 7 It is a schematic diagram of the side view structure of the laser drilling mechanism and the conveying roller in the first embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of the distribution of the second reciprocating mechanism in the second embodiment of the present invention;

[0040] Fig. 9 It is a schematic diagram of the side view of the suction mechanism and the conveying roller in the second embodiment of the present invention;

[0041] Fig.10 This is a schematic diagram of the appearance structure of the air suction mechanism in the second embodiment of the present invention.

[0042] In the figure:

[0043] 100, bag making machine body; 110, feeding mechanism; 111, conveying roller;

[0044] 200, first reciprocating mechanism; 210, first lead screw; 220, first slider; 230, first motor;

[0045] 300, gas transmission mechanism; 310, first controller; 320, servo motor; 321, piston; 322, screw; 330, gas chamber; 331, air inlet valve; 332, exhaust valve; 333, gas transmission pipe;

[0046] 400, laser drilling mechanism; 410, second controller; 420, laser output head; 430, connecting sleeve; 431, air inlet;

[0047] 500, air guide cover; 510, air flow chamber;

[0048] 600, second reciprocating mechanism; 610, second lead screw; 620, second slider; 630, second motor; 700, air suction mechanism; 710, air collecting hood; 720, negative pressure tube. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] See also Figures 1 to 10 , the present invention provides the following two embodiments:

[0051] Embodiment 1:

[0052] See also Figure 1 A laser punching device based on a plastic bag making machine includes a first reciprocating mechanism 200, an air delivery mechanism 300 and a laser punching mechanism 400.

[0053] See also Figure 1 The feeding mechanism 110 is disposed on one side of the bag making machine body 100 , and the first reciprocating mechanism 200 is disposed on the surface of the feeding mechanism 110 , and the first reciprocating mechanism 200 drives the laser punching mechanism 400 to move reciprocatingly.

[0054] For details, please refer to Figure 1 and Figure 7 The feeding mechanism 110 includes a plurality of conveying rollers 111 , and the laser drilling mechanism 400 is located between adjacent conveying rollers 111 .

[0055] For details, please refer to Figure 1 The first reciprocating mechanism 200 includes one or more first lead screws 210, a first slider 220 and a first motor 230. The inner wall of the first slider 220 is rotationally engaged with the surface of the first lead screw 210, and the output end of the first motor 230 is connected to one end of the first lead screw 210.

[0056] Gears are provided at both ends of the first lead screw 210, and the gears between adjacent first lead screws 210 are meshed. The first lead screws 210 are transmitted through the gears, so that only one first motor 230 is arranged to drive multiple first lead screws 210 to rotate synchronously. Multiple first lead screws 210 synchronously drive the first slider 220 to move, which can ensure the smooth transportation of the first slider 220, thereby ensuring the accuracy and quality of laser drilling.

[0057] See also Figures 1 to 3 The air delivery mechanism 300 and the laser drilling mechanism 400 are both installed on the lower surface of the first slider 220. The first motor 230 drives the first lead screw 210 to rotate, and cooperates with the mutual meshing relationship between the first slider 220 and the surface of the first lead screw 210 to drive the first slider 220 to move back and forth along the surface of the first lead screw 210, thereby driving the laser drilling mechanism 400 and the air delivery mechanism 300 to perform continuous drilling operations along the surface of the plastic film.

[0058] See also Figures 2 to 4 The laser drilling mechanism 400 includes a laser output head 420 and a connecting sleeve 430. The connecting sleeve 430 is arranged on the outer wall of the bottom end of the laser output head 420. One or more air inlet holes 431 are opened on the surface of the connecting sleeve 430.

[0059] For details, please refer to Figure 3 There are two air inlet holes 431 and two air delivery pipes 333 , and the two air inlet holes 431 are used to meet the gas delivery needs of the piston 321 when it moves back and forth.

[0060] An air guide cover 500 is rotatably mounted inside the connecting sleeve 430 , and an air flow chamber 510 is formed between the inner wall of the air guide cover 500 and the outer wall of the laser output head 420 , and the air flow chamber 510 is communicated with the air inlet 431 .

[0061] It is worth noting that a sealing ring is provided on the upper edge of the air guide cover 500, and the sealing ring is made of rubber material and has a certain elasticity. After the air guide cover 500 is rotatably installed inside the connecting sleeve 430, the upper edge of the air guide cover 500 and the surface of the connecting sleeve 430 achieve a sealing effect, so that the air input from the air inlet 431 can only flow through the inside of the air flow chamber 510.

[0062] Second, see Figure 4 When the air guide cover 500 and the laser output head 420 are installed, the gap between the inner wall of the air guide cover 500 and the conical surface at the bottom end of the laser output head 420 can be adjusted.

[0063] Specifically, when the inner wall at the bottom of the air guide cover 500 is completely in contact with the bottom conical surface of the laser output head 420, the bottom output port of the airflow bin 510 is closed and the airflow cannot be conducted to dissipate the smoke.

[0064] Specifically, when the inner wall at the bottom of the air guide cover 500 and the conical surface at the bottom of the laser output head 420 gradually move away from each other, there are the following three situations:

[0065] The first type: when the gap between the conical surface at the bottom of the air guide cover 500 and the conical surface at the bottom of the laser output head 420 is smaller than the gap between the straight tube section at the top of the air guide cover 500 and the straight tube section of the laser output head 420, that is, when the gap of the conical cavity at the bottom of the airflow chamber 510 is smaller than the gap of the straight tube section at the top of the airflow chamber 510. The air velocity flowing out of the bottom of the airflow chamber 510 is greater than the velocity when the air is input into the air inlet 431, that is, air pressurization is performed, with a stronger airflow output pressure, which can disperse a large amount of smoke and is suitable for large-aperture laser drilling operations.

[0066] Specifically, it is suitable for continuous laser drilling operations with a hole diameter greater than 5 mm.

[0067] The second type: when the gap between the conical surface at the bottom of the air guide cover 500 and the conical surface at the bottom of the laser output head 420 is equal to the gap between the straight tube section at the top of the air guide cover 500 and the straight tube section of the laser output head 420, that is, when the gap of the conical cavity at the bottom of the airflow bin 510 is equal to the gap of the straight tube section at the top of the airflow bin 510, the gap of the airflow bin 510 is uniform. The air velocity flowing out of the bottom of the airflow bin 510 is similar to the velocity when the air is input into the air inlet 431, so a certain amount of smoke can be dispersed. It is suitable for laser drilling operations with standard apertures.

[0068] Specifically, it is suitable for continuous laser drilling operations within the range of hole diameter 2-5mm.

[0069] The third type: when the gap between the conical surface at the bottom of the air guide cover 500 and the conical surface at the bottom of the laser output head 420 is larger than the gap between the straight tube section at the top of the air guide cover 500 and the straight tube section of the laser output head 420, that is, when the gap of the conical cavity at the bottom of the airflow chamber 510 is larger than the gap of the straight tube section at the top of the airflow chamber 510. The air velocity flowing out of the bottom of the airflow chamber 510 is smaller than the velocity when the air is input into the air inlet 431, that is, the air pressure is reduced, and the smoke that can be dispersed is reduced. It is suitable for laser drilling of tiny holes.

[0070] Specifically, it is suitable for continuous laser drilling operations with a hole diameter less than 2 mm.

[0071] See also Figures 1 to 3A gas delivery mechanism 300 is provided on one side of the laser drilling mechanism 400. The gas delivery mechanism 300 includes a servo motor 320 and a gas chamber 330. The output end of the servo motor 320 is connected to a screw rod 322. The surface of the screw rod 322 is rotatably engaged with a piston 321. The piston 321 is slidably installed inside the gas chamber 330.

[0072] Specifically, the servo motor 320 drives the screw rod 322 to rotate, and drives the piston 321 to move along the inside of the air chamber 330. During the movement of the piston 321, the air in the air chamber 330 can be squeezed out, thereby achieving the effect of air pumping.

[0073] It is worth noting that see Figure 3 and Figure 6 The air chamber 330 and the piston 321 are both polygonal structures. During the rotation of the screw 322, the fit between the piston 321 and the inner wall of the air chamber 330 can eliminate the self-rotation tendency of the piston 321, that is, the inner wall of the air chamber 330 limits the piston 321, so that the piston 321 can only move back and forth inside the air chamber 330.

[0074] See also Figure 2 , Figure 3 , Figure 4 and Figure 6 The outer wall of the gas chamber 330 is connected to one or more air inlet valves 331 and one or more exhaust valves 332 , and an air pipe 333 is connected between the exhaust valve 332 and the air inlet hole 431 .

[0075] For details, please refer to Figure 3 , Figure 5 and Figure 6 There are two air intake valves 331 , and the two air intake valves 331 are distributed on the two end surfaces of the gas bin 330 . Both air intake valves 331 are one-way valves, and the outlets of the air intake valves 331 are located inside the gas bin 330 .

[0076] For details, please refer to Figure 3 , Figure 5 and Figure 6 There are two exhaust valves 332 , and the two exhaust valves 332 are distributed on the two end surfaces of the air bin 330 . Both exhaust valves 332 are one-way valves, and the inlet of the exhaust valve 332 is located inside the air inlet bin 330 .

[0077] When the piston 321 descends along the inner wall of the air bin 330, air is discharged from the exhaust valve 332 at the bottom of the air bin 330 and input into the air flow bin 510 through the air pipe 333. At the same time, outside air enters the space above the piston 321 from the air inlet valve 331 above the air bin 330, which not only replenishes air but also prevents negative pressure from forming in the space above the piston 321 and affecting the smooth movement of the piston 321.

[0078] When the piston 321 rises along the inner wall of the air bin 330, air is discharged from the exhaust valve 332 at the top of the air bin 330 and input into the air flow bin 510 through the air pipe 333. At the same time, outside air enters the space below the piston 321 from the air inlet valve 331 below the air bin 330, which not only replenishes air but also prevents negative pressure from forming in the space below the piston 321 and affecting the smooth movement of the piston 321.

[0079] The air transmitted to the airflow bin 510 disperses the smoke generated in the laser drilling area. On the one hand, the smoke diffuses along the edge of the drilling area. On the other hand, the smoke flows through the holes formed on the plastic surface along the airflow to the bottom of the plastic film, so that the smoke does not escape in the laser drilling working area.

[0080] For details, please refer to Figure 2 The gas delivery mechanism 300 also includes a first controller 310. A communication channel is established between the first controller 310 and the servo motor 320. The first controller 310 is used to control the output number of revolutions, output speed, output time and output direction of the servo motor 320, and is used to control the airflow output amount, airflow output time and airflow output direction.

[0081] For details, please refer to Figure 2 The laser drilling mechanism 400 further includes a second controller 410, and a communication channel is constructed between the second controller 410 and the laser output head 420. The second controller 410 is used to control the energy, output frequency, output time, focusing distance and focusing size of the laser beam output, and is used to control different apertures, different thicknesses of plastic bags, and different hole distances.

[0082] It is worth noting that the second controller 410 is also connected to the control unit of the first reciprocating mechanism 200, and its purpose is to control the distance that the first reciprocating mechanism 200 drives the laser drilling mechanism 400 to move, that is, to control the spacing between adjacent holes.

[0083] A communication channel is constructed between the second controller 410 and the first controller 310. After the second controller 410 is connected to the first controller 310, the laser beam emission frequency and the airflow output frequency can be coordinated to achieve airflow output in the time period before and after the laser beam is emitted to disperse the smoke in the laser beam working area to ensure the energy concentration of the laser beam.

[0084] Secondly, the staff can also control the volume of the single air output of the air delivery mechanism 300 through the first controller 310. Specifically, the first controller 310 controls the number of revolutions of the servo motor 320 each time it outputs an air command, and then adjusts the distance moved by the piston 321 during each air output process, thereby controlling the volume of the output air. This allows the staff to flexibly adjust according to production conditions during actual use.

[0085] Specifically, if the output air volume is insufficient to meet the smoke dispersal effect during the current laser drilling operation, the staff can set the single output number of the servo motor 320 through the first controller 310, that is, increase the single movement distance of the piston 321 to output more air.

[0086] Specifically, if the output air volume is large and the airflow to the hole causes air flow disruption, the staff can reduce the single output number of the servo motor 320 through the first controller 310, thereby reducing the single movement distance of the piston 321 and reducing the output air volume.

[0087] The control unit of the first reciprocating mechanism 200, the first motor 230, the first controller 310, the servo motor 320, the second controller 410, the laser output head 420 and the laser generator included in the laser drilling mechanism 400 in the above technical content are all mature existing technologies. Personnel in related fields can clearly understand their related working and control principles based on common sense and professional knowledge in related fields, and technical personnel in this field can select their models according to actual production needs, and will not be elaborated in this solution.

[0088] During actual use, as the conveying roller 111 transports the plastic film of the plastic bag raw material, the first reciprocating mechanism 200 drives the air supply mechanism 300 and the laser punching mechanism 400 to move back and forth, and the laser punching mechanism 400 continuously punches holes on the surface of the plastic film. At the same time, the air supply mechanism 300 and the laser punching mechanism 400 keep synchronously conveying air to disperse the smoke generated by the laser punching, prevent the smoke from diffusing in the propagation range of the laser beam and reducing the energy of the laser beam, thereby ensuring the quality of laser punching of the plastic bag.

[0089] Embodiment 2:

[0090] Based on the above disclosed content, another embodiment is proposed again:

[0091] See also Figures 8 to 10 The second reciprocating mechanism 600 is disposed below the feeding mechanism 110 , and the second reciprocating mechanism 600 is connected to the suction mechanism 700 , and the second reciprocating mechanism 600 drives the suction mechanism 700 to move reciprocatingly.

[0092] See also Fig.10 The air suction mechanism 700 includes an air collecting hood 710 and a negative pressure pipe 720. The air collecting hood 710 is located directly below the laser drilling mechanism 400. The negative pressure pipe 720 is connected to the inside of the air collecting hood 710. The negative pressure pipe 720 is connected to the negative pressure fan. The negative pressure at the air inlet when the negative pressure fan is running is used as a power source for smoke absorption.

[0093] See also Figure 8 The second reciprocating mechanism 600 includes one or more second lead screws 610, a second slider 620, and a second motor 630. The inner wall of the second slider 620 is rotatably engaged with the surface of the second lead screw 610. The output end of the second motor 630 is connected to one end of the second lead screw 610. Gears are provided at both ends of the second lead screw 610, and the gears between adjacent second lead screws 610 are engaged. The second lead screws 610 are driven by gears, so that only one second motor 630 can drive multiple second lead screws 610 to rotate synchronously. Multiple second lead screws 610 synchronously drive the second slider 620 to move, which can ensure the transportation stability of the second slider 620.

[0094] It is worth noting that the control unit of the second reciprocating mechanism 600 is connected to the control unit of the first reciprocating mechanism 200 for synchronizing the movement stroke of the second reciprocating mechanism 600 with the stroke of the first reciprocating mechanism 200 .

[0095] The control unit of the second reciprocating mechanism 600, the second motor 630 and the negative pressure fan in the above technical content are all mature existing technologies. Personnel in related fields can clearly understand their related working and control principles based on common knowledge and professional knowledge in related fields, and technical personnel in this field can select their models according to actual production needs, and will not be elaborated in this solution.

[0096] See also Figure 8 and Fig.10 The suction mechanism 700 is installed on the upper surface of the second slider 620 .

[0097] The second motor 630 drives the second lead screw 610 to rotate, and cooperates with the mutual meshing relationship between the second slider 620 and the surface of the second lead screw 610 to drive the second slider 620 to move back and forth along the surface of the second lead screw 610, so as to keep the suction mechanism 700 and the laser drilling mechanism 400 running synchronously. After the holes are formed on the plastic surface, the negative pressure generated by the negative pressure tube 720 sucks the smoke generated around the holes into the gas collecting hood 710 through the holes, which reduces the smoke in the working area of ​​the laser drilling mechanism 400 on the one hand, and can also render the inhaled smoke harmless on the other hand, thereby improving the air quality in the processing area and reducing the negative impact of the smoke on the health of the workers.

[0098] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A laser punching device based on a plastic bag making machine, characterized in that: It comprises a first reciprocating mechanism (200), a gas transmission mechanism (300) and a laser drilling mechanism (400); The first reciprocating mechanism (200) drives the laser drilling mechanism (400) to move reciprocatingly, and the gas delivery mechanism (300) is arranged on one side of the laser drilling mechanism (400); The laser drilling mechanism (400) comprises a laser output head (420) and a connecting sleeve (430), wherein the connecting sleeve (430) is arranged on the outer wall of the bottom end of the laser output head (420), and one or more air inlet holes (431) are opened on the surface of the connecting sleeve (430); An air guide cover (500) is rotatably mounted inside the connecting sleeve (430), an air flow chamber (510) is formed between the inner wall of the air guide cover (500) and the outer wall of the laser output head (420), and the air flow chamber (510) is connected to the air inlet (431); The gas delivery mechanism (300) comprises a servo motor (320) and a gas chamber (330), the output end of the servo motor (320) is connected to a screw rod (322), the surface of the screw rod (322) is rotatably engaged with a piston (321), and the piston (321) is slidably mounted inside the gas chamber (330); The outer wall of the gas bin (330) is connected to one or more air inlet valves (331) and one or more air exhaust valves (332), and an air delivery pipe (333) is connected between the air exhaust valve (332) and the air inlet hole (431).

2. A laser punching device based on a plastic bag making machine according to claim 1, characterized in that: The first reciprocating mechanism (200) comprises one or more first lead screws (210), a first slider (220) and a first motor (230), wherein the inner wall of the first slider (220) is rotatably engaged with the surface of the first lead screw (210), and the output end of the first motor (230) is connected to one end of the first lead screw (210); Gears are provided at both ends of the first lead screw (210), and the gears between adjacent first lead screws (210) are meshed; The gas delivery mechanism (300) and the laser drilling mechanism (400) are both installed on the lower surface of the first sliding block (220).

3. The laser punching device based on a plastic bag making machine according to claim 1, characterized in that: The gas delivery mechanism (300) further comprises a first controller (310), and a communication channel is established between the first controller (310) and the servo motor (320).

4. The laser punching device based on a plastic bag making machine according to claim 3 is characterized in that: The laser drilling mechanism (400) further comprises a second controller (410), a communication channel is constructed between the second controller (410) and the laser output head (420), and a communication channel is constructed between the second controller (410) and the first controller (310).

5. The laser punching device based on a plastic bag making machine according to claim 1, characterized in that: The number of the air intake valves (331) is two, and the two air intake valves (331) are distributed on the two end surfaces of the air bin (330); Both of the two air inlet valves (331) are one-way valves, and outlets of the air inlet valves (331) are located inside the air chamber (330).

6. The laser punching device based on a plastic bag making machine according to claim 5, characterized in that: The number of the exhaust valves (332) is two, and the two exhaust valves (332) are distributed on the two end surfaces of the gas bin (330); Both exhaust valves (332) are one-way valves, and the inlets of the exhaust valves (332) are located inside the air intake bin (330).

7. The laser punching device based on a plastic bag making machine according to claim 6, characterized in that: The number of the air inlet hole (431) and the air delivery pipe (333) is two.

8. The laser punching device based on a plastic bag making machine according to claim 1, characterized in that: It comprises a second reciprocating mechanism (600), wherein the second reciprocating mechanism (600) is connected to an air suction mechanism (700), and the second reciprocating mechanism (600) drives the air suction mechanism (700) to move reciprocatingly; The air suction mechanism (700) comprises an air collecting hood (710) and a negative pressure pipe (720); the air collecting hood (710) is located directly below the laser drilling mechanism (400); and the negative pressure pipe (720) is connected to the inside of the air collecting hood (710).

9. The laser punching device based on a plastic bag making machine according to claim 8, characterized in that: The second reciprocating mechanism (600) comprises one or more second lead screws (610), a second slider (620) and a second motor (630), wherein the inner wall of the second slider (620) is rotatably engaged with the surface of the second lead screw (610), and the output end of the second motor (630) is connected to one end of the second lead screw (610); Gears are provided at both ends of the second lead screw (610), and the gears between adjacent second lead screws (610) are meshed; The air suction mechanism (700) is installed on the upper surface of the second slider (620).

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