Packaging film laser cutting equipment for plastic packaging

Abstract

The invention relates to the technical field of laser cutting equipment, in particular to packaging film laser cutting equipment for plastic packaging. According to the technical scheme, the device comprises a fixing table which is composed of a plurality of adsorption blocks and installed on a machine body, each adsorption block comprises a base and an elastic contraction ring installed on the base, a top plate is fixedly installed on the contraction rings, and a plurality of adsorption holes are formed in the top plate. According to the invention, the processing difficulty can be effectively reduced, so that finer adsorption holes can be formed in the top plate, and the possibility that the contact positions of a plastic film and the adsorption holes are concave downwards when the plastic film is adsorbed and fixed can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting equipment, and in particular to a packaging film laser cutting equipment for plastic packaging. Background Art

[0002] With the rapid development of the plastic packaging industry, traditional mechanical cutting methods have gradually exposed limitations, such as low precision, strong mold dependence, and inability to adapt to complex pattern cutting. At the same time, environmental protection and efficiency requirements have driven the industry to transform to automated, high-precision technology. Laser technology has become an important solution in the field of plastic packaging film cutting due to its non-contact, high-precision, and high-flexibility characteristics. Laser cutting equipment uses a high-energy laser beam to focus on the surface of the plastic film and achieves precise cutting through thermal effects (melting or gasification). The cutting path is controlled by computer software and cooperates with a precision motion system to complete high-speed processing of complex graphics.

[0003] During the cutting process, the plastic film needs to be firmly fixed on the cutting table. Generally, a vacuum adsorption system is used to fix the plastic film. The existing vacuum system generally opens multiple holes on the fixed table and installs a suction cup structure in the holes. However, when the soft plastic film is fixed by using a vacuum suction cup, a concave phenomenon may occur at the position where the film contacts the suction cup. This phenomenon may affect the accuracy of laser cutting. And the concave may cause uneven tension of the plastic film in the cutting area, which may affect the smoothness and quality of the cutting edge.

[0004] In order to solve the above problems, it is possible to set up tight and small suction cups, that is, to open small and dense suction cups on a fixed table, so that the adsorption force can be more evenly distributed on the film or workpiece, thereby reducing the pressure concentration on the contact point of a single suction cup. And because the adsorption area of ​​each suction cup is small, the force they exert on the film material is relatively small, so the local deformation of the film material under the action of the suction cup will also be small. In turn, the possibility of concave phenomenon at the contact position between the film and the suction cup can be reduced. However, as the number of holes increases and the aperture decreases, the suction cup structure installed in the hole needs to be smaller, and the number will increase greatly, increasing the difficulty of processing and installation. Under the limitations of existing process technology, the suction cup structure inside the hole cannot be too small, so the aperture of the hole cannot be too small. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the background technology and to provide a packaging film laser cutting device for plastic packaging.

[0006] The technical solution of the present invention is: a packaging film laser cutting device for plastic packaging, comprising a body, and also comprising:

[0007] A fixed platform composed of a plurality of adsorption blocks and mounted on the machine body, wherein the adsorption block comprises a base and an elastic shrink ring mounted on the base, a top plate is fixedly mounted on the shrink ring, and a plurality of adsorption holes are provided on the top plate;

[0008] A blocking piece installed in the base, the blocking piece is provided with a through hole corresponding to the adsorption hole, the through hole is provided with an elastic sheet for blocking the through hole, and the blocking piece is provided with a plurality of flow holes staggered with the adsorption hole;

[0009] A plugging component is installed in the base, and when the top of at least one adsorption hole is blocked, the plugging component blocks the remaining adsorption holes.

[0010] Optionally, the sealing assembly includes a first driving cylinder fixedly installed inside the base, a first sealing block is slidably installed in the first driving cylinder, a driving rod is fixedly installed on the first sealing block, the driving rod passes through the top of the first driving cylinder and is rotatably installed with a connecting disk, the connecting disk is fixedly connected to the sealing piece, a plurality of first springs are fixedly installed in a circular array between the first driving cylinder and the connecting disk, at least two groups of release assemblies are installed in the base, the angle between the two groups of release assemblies is 90°, and the release assembly drives the sealing piece to move toward a direction close to the adsorption hole when the connecting disk rotates.

[0011] Optionally, the release assembly includes a second driving cylinder fixedly mounted on the base, a second sealing block being slidably mounted in the second driving cylinder, a second spring being fixedly mounted between the second sealing block and the second driving cylinder, the first driving cylinder and the second driving cylinder being connected through a first delivery pipe, a valve assembly being fixedly mounted on the first delivery pipe, and the opening and closing state of the valve assembly being controlled according to the force balance state of the connecting disk.

[0012] Optionally, the valve assembly includes a valve body, a slide groove is provided in the valve body, a valve core is slidably installed in the slide groove, slots are provided on the upper and lower sides of the valve core, a pressure rod is fixedly installed on the valve core, the pressure rod passes through the top of the valve body and is fixedly installed with a connecting rope, a third spring is fixedly installed between the pressure rod and the valve body, a transmission rod is fixedly installed on the connecting rope, and the other end of the transmission rod is rotatably connected to the connecting disk.

[0013] Optionally, the first driving cylinder, the second driving cylinder, the first delivery pipe and the valve assembly are all filled with hydraulic medium, and an oil return control assembly is installed between the first driving cylinder and the second driving cylinder.

[0014] Optionally, the oil return control assembly includes a second delivery pipe fixedly mounted between the first driving cylinder and the second driving cylinder, a pressurizing valve group is installed on the second delivery pipe, the pressurizing valve group includes a hollow block fixedly mounted on the second delivery pipe, the hollow block is provided with a hole connected to the second delivery pipe, a sliding rod is slidably mounted in the hollow block, a sealing head with an aperture consistent with that of the hole is fixedly mounted on the sliding rod, a fourth spring is fixedly mounted between the sealing head and the hollow block, and the elastic coefficient of the fourth spring is greater than that of the second spring.

[0015] Optionally, a T-shaped hole is provided in the base, a sealing ball is movably installed in the T-shaped hole, a fifth spring is fixedly installed between the sealing ball and the base, a filter is fixedly installed on the T-shaped hole, a suction cup pressure maintaining chamber is fixedly installed in the body, the suction cup pressure maintaining chamber is connected to the T-shaped hole, and the suction cup pressure maintaining chamber is connected to the air pump system.

[0016] Optionally, two first slide rails are fixedly installed on the machine body, a first support block is installed on the first slide rails, a first driving mechanism for driving the first support block to move along the first slide rails is installed in the machine body, a second slide rail is fixedly installed on the two first support blocks, a second support block is slidably installed on the second slide rails, a second driving mechanism for driving the second support block to move along the second slide rails is installed in the machine body, and a laser is fixedly installed on the second support block.

[0017] Optionally, air guide covers are fixedly installed on both sides of the body, a filter is fixedly installed inside the body, both ends of the filter are connected to the air guide covers on both sides through air pipes, a fan is fixedly installed on one of the air pipes, and a wind direction adjustment component is installed in the air guide cover for adjusting the exhaust position of the air guide cover according to the position of the laser.

[0018] Optionally, the wind direction adjustment component includes two first telescopic plates slidably installed in the wind guide cover, a connecting block is fixedly installed between the two telescopic plates, the connecting block is provided with wind holes, a slide groove is provided at the bottom of the wind guide cover, two second telescopic plates are slidably installed in the slide groove, a rectangular block is fixedly installed between the second telescopic plates, a connecting strip is fixedly installed on the rectangular block, and the other end of the connecting strip is fixedly connected to the first support block.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] By setting up the blocking component and using the blocking sheet and the thin sheet, the structure can be set up in a larger base. Since the structure of the thin sheet is relatively easy to realize, the processing difficulty can be effectively reduced, and more dense adsorption holes can be opened on the top plate, which can effectively reduce the possibility of the concave phenomenon occurring at the contact position between the film and the adsorption hole when the plastic film is adsorbed and fixed;

[0021] It greatly reduces the difficulty of processing and installation, and can greatly reduce the aperture of the adsorption hole, so that the adsorption area of ​​each adsorption hole is smaller, and the force applied to the membrane material is relatively small, so the local deformation of the membrane material under negative pressure adsorption will also be smaller. It can reduce the possibility of concave phenomenon at the contact position between the membrane and the suction cup, and can avoid the concave phenomenon of the membrane affecting the accuracy of laser cutting, resulting in uneven tension in the cutting area, and affecting the smoothness and quality of the cutting edge. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the laser cutting equipment;

[0023] Figure 2 It is a schematic diagram of the internal structure of the laser cutting equipment;

[0024] Figure 3 It is a structural schematic diagram of the fixed platform;

[0025] Figure 4 It is a structural schematic diagram of the adsorption block;

[0026] Figure 5 It is a schematic diagram of the structure inside the adsorption block;

[0027] Figure 6 This is the exploded diagram of the adsorption block;

[0028] Figure 7 Schematic diagram of the plugging component Figure 1 ;

[0029] Figure 8 Schematic diagram of the plugging component Figure 2 ;

[0030] Fig. 9 This is a schematic diagram of the structure of the valve assembly;

[0031] Fig.10 It is a structural schematic diagram of the pressurizing valve group;

[0032] Fig.11 It is a structural schematic diagram of the wind direction adjustment component;

[0033] Fig.12 It is a structural schematic diagram of the wind direction adjustment component.

[0034] Figure numerals: 1, machine body; 101, door; 2, first slide rail; 201, first support block; 202, second slide rail; 203, second support block; 204, laser; 3, fixing table; 301, adsorption block; 302, base; 303, shrink ring; 304, connecting plate; 305, top plate; 306, adsorption hole; 307, blocking plate; 308, through hole; 309, sheet; 310, flow hole; 311, first driving cylinder; 312, first sealing block; 313, driving rod; 314, connecting plate; 315, first spring; 316, second driving cylinder; 317, second sealing block; 318, second spring; 319, first delivery pipe; 320, valve Components; 321, valve body; 322, slide; 323, valve core; 324, notch; 325, pressure rod; 326, third spring; 327, connecting rope; 328, transmission rod; 329, second delivery pipe; 330, pressurizing valve group; 331, hollow block; 332, slide; 333, plugging head; 334, fourth spring; 4, T-hole; 401, plugging ball; 402, fifth spring; 403, filter; 5, suction cup pressure chamber; 6, wind guide cover; 601, filter; 602, air pipe; 603, fan; 7, telescopic plate; 701, connecting block; 702, air hole; 703, slide; 704, second telescopic plate; 705, rectangular block; 706, connecting strip. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] like Figures 1 to 6 As shown, a packaging film laser cutting device for plastic packaging proposed by the present invention includes a body 1, and also includes a fixed platform 3 composed of a plurality of adsorption blocks 301 and mounted on the body 1. Before cutting the plastic film, the plastic film needs to be placed on the fixed platform 3 and fixed by the fixed platform 3. The adsorption block 301 includes a base 302 and an elastic shrink ring 303 mounted on the base 302. A top plate 305 is fixedly mounted on the shrink ring 303. A connecting plate 304 is fixedly mounted on the shrink ring 303. The top plate 305 is fixedly connected to the connecting plate 304. The setting of the shrink ring 303 can make the top plate 305 have a certain range of up and down movement. A plurality of adsorption holes 306 are provided on the top plate 305. The plastic film placed on the fixed platform 3 will be located above the adsorption holes 306. When the adsorption holes 306 are under negative pressure, the plastic film can be adsorbed, thereby fixing the plastic film.

[0037] Furthermore, the blocking piece 307 installed in the base 302 is provided with a through hole 308 corresponding to the adsorption hole 306, and a thin sheet 309 with elasticity for blocking the through hole 308 is installed on the through hole 308. When the blocking piece 307 is attached to the adsorption hole 306, the negative pressure inside the base 302 will adsorb the thin sheet 309, causing the thin sheet 309 to be concave downward. At this time, the space between the thin sheet 309 and the plastic film will be in a negative pressure state, and then when the blocking piece 307 is attached to the adsorption hole 306, the plastic film can be adsorbed and fixed by the deformation of the thin sheet 309. The blocking piece 307 is provided with a plurality of flow holes 310 that are staggered with the adsorption hole 306. When the blocking piece 307 is not attached to the adsorption hole 306, when the base 302 is evacuated to the outside, the external gas will enter the base 302 through the adsorption hole 306 and the flow hole 310.

[0038] like Figures 4 to 10 As shown, the present embodiment also includes a blocking component, which is installed in the base 302. When the top of at least one adsorption hole 306 is blocked, the blocking component blocks the remaining adsorption holes 306. Since the area of ​​a single top plate 305 is large, the edge of the plastic film may not be able to completely cover the entire top plate 305, that is, the edge of the plastic film cannot completely cover all the adsorption holes 306 on the top plate 305. However, in order to ensure that the top plate 305 can effectively adsorb the plastic film, the blocking component can be used to block the remaining adsorption holes 306 on the top plate 305, so that the top plate 305 and the base 302 connected thereto can be in a sealed state, and then a negative pressure can be generated between the top plate 305 and the base 302, so that the plastic film can be effectively adsorbed and fixed.

[0039] Furthermore, the blocking assembly includes a first driving cylinder 311 fixedly mounted inside the base 302, a first sealing block 312 is slidably mounted inside the first driving cylinder 311, a driving rod 313 is fixedly mounted on the first sealing block 312, the driving rod 313 passes through the top of the first driving cylinder 311 and is rotatably mounted with a connecting disk 314, the connecting disk 314 is fixedly connected to the blocking piece 307, and a plurality of first springs 315 are fixedly mounted in a circumferential array between the first driving cylinder 311 and the connecting disk 314. By setting the first springs 315, the connecting disk 314 can be connected to the first driving cylinder 311. The disk 314 is in a horizontal state. When the adsorption holes 306 are evacuating air from the outside, the gas passing through the adsorption holes 306 will generate air pressure on the blocking piece 307. When the adsorption holes 306 are not completely covered by the plastic film, the blocking piece 307 will be in a state of unbalanced force, which will cause the connection disk 314 to rotate. At least two sets of release components are installed in the base 302. The angle between the two sets of release components is 90°. When the connection disk 314 rotates, the release components drive the blocking piece 307 to move in the direction close to the adsorption holes 306. In this way, when the adsorption holes 306 are not completely blocked, the blocking piece 307 can block all the adsorption holes 306.

[0040] Among them, the release component includes a second driving cylinder 316 fixedly installed on the base 302, a second sealing block 317 is slidably installed in the second driving cylinder 316, a second spring 318 is fixedly installed between the second sealing block 317 and the second driving cylinder 316, the first driving cylinder 311 and the second driving cylinder 316 are connected through a first delivery pipe 319, and a valve assembly 320 is fixedly installed on the first delivery pipe 319, and the opening and closing state of the valve assembly 320 is controlled according to the force balance state of the connecting disk 314.

[0041] Furthermore, the valve assembly 320 includes a valve body 321, a slide groove 322 is provided in the valve body 321, a valve core 323 is slidably installed in the slide groove 322, slots 324 are provided on the upper and lower sides of the valve core 323, a pressure rod 325 is fixedly installed on the valve core 323, the pressure rod 325 passes through the top of the valve body 321 and is fixedly installed with a connecting rope 327, a third spring 326 is fixedly installed between the pressure rod 325 and the valve body 321, a transmission rod 328 is fixedly installed on the connecting rope 327, and the other end of the transmission rod 328 is rotatably connected to the connecting disk 314. When the connecting plate 314 rotates, the transmission rod 328 is driven to move, and the transmission rod 328 pulls the pressure rod 325 to move through the connecting rope 327, and the moving pressure rod 325 can drive the valve core 323 to move, thereby opening the valve assembly 320. When the transmission rod 328 does not apply pressure to the pressure rod, the valve core 323 is reset under the action of the third spring 326, so that the valve core 323 blocks the valve body 321.

[0042] It is worth noting that through the setting of the connecting rope 327, due to the soft nature of the connecting rope 327, when the connecting disk 314 is slightly tilted, the connecting rope 327 will be tensioned first. When the connecting rope 327 is tensioned, the connecting disk 314 that continues to rotate can drive the valve core 323 to move. By adjusting the length of the connecting rope 327, the slight rotation of the connecting disk 314 can be effectively filtered.

[0043] It should be noted that the first drive cylinder 311, the second drive cylinder 316, the first delivery pipe 319 and the valve assembly 320 are all filled with hydraulic medium, which is a liquid that cannot be compressed under the working environment, and an oil return control assembly is installed between the first drive cylinder 311 and the second drive cylinder 316. When the valve assembly 320 is opened, under the action of the second spring 318, the hydraulic medium inside the second drive cylinder 316 can be squeezed into the first drive cylinder 311, and the first sealing block 312 is driven to rise, and then the connecting plate 314 is driven to rise. At this time, the rising connecting plate 314 will drive the blocking piece 307 to block the adsorption hole 306, and in the process of the blocking piece 307 gradually contacting the top plate 305, the blocking piece 307 will drive the connecting plate 314 to gradually return to a horizontal state, thereby blocking the valve assembly 320.

[0044] In this embodiment, the oil return control assembly includes a second delivery pipe 329 fixedly installed between the first drive cylinder 311 and the second drive cylinder 316, and a pressurizing valve group 330 is installed on the second delivery pipe 329. The pressurizing valve group 330 includes a hollow block 331 fixedly installed on the second delivery pipe 329, and a hole connected to the second delivery pipe 329 is provided on the hollow block 331. A sliding rod 332 is slidably installed in the hollow block 331, and a plugging head 333 with a hole diameter consistent with the hole is fixedly installed on the sliding rod 332. A fourth spring 334 is fixedly installed between the plugging head 333 and the hollow block 331. The second delivery pipe 329 is also filled with hydraulic medium. Since the elastic coefficient of the fourth spring 334 is greater than that of the second spring 318, when the second spring 318 presses the hydraulic medium in the second drive cylinder 316 into the first drive cylinder 311 , the hydraulic medium cannot flow back to the second driving cylinder 316 through the pressurizing valve group 330. When the processing of the plastic film is completed and the sealing piece 307 needs to be separated from the adsorption hole 306, the negative pressure inside the base 302 can continue to be applied. Due to the setting of the shrink ring 303, the top plate 305 can drive the sealing piece 307 to move downward, and then the negative pressure inside the base 302 can be cancelled. At this time, under the action of the external air pressure and the elasticity of the shrink ring 303, the top plate 305 can be reset. At this time, the hydraulic medium inside the first driving cylinder 311 can overcome the pressure of the fourth spring 334, so that the hydraulic medium inside the first driving cylinder 311 can flow back to the second driving cylinder 316, thereby separating the top plate 305 from the sealing piece 307, and at the same time, the adsorption and fixing effect on the plastic film can be cancelled, and the plastic film can be taken out.

[0045] like Figures 4 to 6As shown, a T-shaped hole 4 is provided in the base 302, a sealing ball 401 is movably installed in the T-shaped hole 4, a fifth spring 402 is fixedly installed between the sealing ball 401 and the base 302, a filter 403 is fixedly installed on the T-shaped hole 4, a suction cup pressure-maintaining chamber 5 is fixedly installed in the body 1, the suction cup pressure-maintaining chamber 5 is connected to the T-shaped hole 4, and the suction cup pressure-maintaining chamber 5 is connected to the air pump system. When all the adsorption holes 306 on a top plate 305 are not blocked by the plastic film, that is, the plastic film is not in contact with the top plate 305, when negative pressure is applied to the inside of the base 302, the external gas will pass through the adsorption holes 306. Since the forces at various locations of the sealing piece 307 are balanced at this time, the sealing piece 307 will not be skewed. At this time, the gas enters the T-shaped hole 4 through the circulation hole 310, and exerts downward pressure on the sealing ball 401, so that the sealing ball 401 blocks the T-shaped hole 4, thereby making the sealing hole 306 that is not in contact with the plastic film The contacting base 302 and the suction cup pressure maintaining chamber 5 are sealed to ensure the air tightness of the suction cup pressure maintaining chamber 5, and the top plate 305 in contact with the plastic film, because the adsorption holes 306 on the top plate 305 will be blocked by the plastic film or the sealing sheet 307, thereby making it possible to maintain good air tightness between the base 302 and the suction cup pressure maintaining chamber 5, and thus, under the action of the air pump system, the suction cup pressure maintaining chamber 5 can be kept in a negative pressure state, so that the adsorption holes 306 can generate suction to the outside, and the plastic film can be fixed by the action of the external air pressure.

[0046] It should be noted that the suction cup structure in the prior art is generally composed of a T-shaped hole 4, a blocking ball 401 and a fifth spring 402. That is to say, in the prior art, a T-shaped hole 4, a blocking ball 401 and a fifth spring 402 need to be provided in each adsorption hole 306. However, through the structure of the present invention, a plurality of adsorption holes 306 can be provided on one structure, thereby greatly increasing the density of the adsorption holes 306 and reducing the aperture of the adsorption holes 306. In order to ensure that the adsorption holes 306 can effectively generate suction to the outside, a thin sheet 309 is provided on the blocking sheet 307 in the present invention. The structure of the thin sheet 309 is such that the thin sheet 309 can be provided on the blocking sheet 307. A thinner position is polished on 307 for replacement. This method is relatively simple and easier to process and manufacture. Since the weaker position is prone to deformation, the deformation of the weak position can be used to create negative pressure between the adsorption hole 306 and the plastic film, and then the sealing component in this scheme can be set in the larger base 302. The sealing sheet 307 is made of rubber material, and the structure of the thin sheet 309 is relatively easy to implement, which can effectively reduce the difficulty of processing, and then more dense adsorption holes 306 can be opened on the top plate 305, which can effectively reduce the concave situation of the plastic film when the plastic film is adsorbed and fixed.

[0047] like Figure 2As shown, two first slide rails 2 are fixedly mounted on the machine body 1, a first support block 201 is mounted on the first slide rail 2, a first driving mechanism for driving the first support block 201 to move along the first slide rail 2 is mounted in the machine body 1, a second slide rail 202 is fixedly mounted on the two first support blocks 201, a second support block 203 is slidably mounted on the second slide rail 202, a second driving mechanism for driving the second support block 203 to move along the second slide rail 202 is mounted in the machine body 1, and a laser 204 is fixedly mounted on the second support block 203. The laser 204 can be driven to move in all directions in a plane by the first driving mechanism and the second driving mechanism, and the plastic film can be cut by the laser emitted by the laser 204, thereby achieving more complex cutting work, increasing cutting efficiency, and improving cutting effect.

[0048] like Figure 2 and Figure 11 to Figure 12 As shown, air guides 6 are fixedly installed on both sides of the machine body 1, and filters 601 are fixedly installed inside the machine body 1. Both ends of the filter 601 are connected to the air guides 6 on both sides through air pipes 602. A fan 603 is fixedly installed on one of the air pipes 602. A wind direction adjustment component for adjusting the exhaust position of the air guide 6 according to the position of the laser 204 is installed inside the air guide 6. When cutting the plastic film, harmful smoke will be generated at the position where the plastic film is cut, and the smoke needs to be filtered by the filter 601. The machine body 1 is rotatably installed with a box door 101. When working, the box door 101 is closed, and the fan 603 is started to make one air guide 6 blow outward and the other air guide 6 inhale, so that the gas inside the machine body 1 can be internally circulated and the gas can be filtered through the filter 601.

[0049] When the gas inside the body 1 is circulated internally, the flow of air will generate lateral force on the plastic film, and thus it is necessary to strengthen the adsorption pressure on the plastic film. The increase in the adsorption pressure will increase the possibility of the plastic film sinking. In this bill, by setting the shrink ring 303, when the inside of the base 302 in contact with the plastic film is under negative pressure, the top plate 305 will move downward to a certain extent, which will cause the top plate 305 in contact with the plastic film to sink, and then the height of the plastic film will be lower than the plane of the fixed table 3. This can effectively prevent the plastic film from being disturbed when the internal gap of the body 1 is circulated, and can effectively reduce the adsorption pressure on the plastic film, and further avoid the possibility of the plastic film sinking.

[0050] Further, the wind direction adjustment assembly includes two first telescopic plates 7 slidably mounted in the wind guide 6, a connecting block 701 is fixedly mounted between the two telescopic plates 7, a wind hole 702 is arranged on the connecting block 701, a slide slot 703 is arranged at the bottom of the wind guide 6, two second telescopic plates 704 are slidably mounted in the slide slot 703, a rectangular block 705 is fixedly mounted between the second telescopic plates 704, a connecting strip 706 is fixedly mounted on the rectangular block 705, and the other end of the connecting strip 706 is fixedly connected to the first support block 201. The gas will be discharged through the wind hole 702, and the movement of the first support block 201 will drive the connecting block 701 to move through the connecting strip 706 and the rectangular block 705, thereby causing the position of the wind hole 702 to move with the movement of the laser 204, and then the gas at the cutting position can be specified to be adsorbed and filtered, thereby avoiding the air inside the entire body 1 from flowing, thereby further reducing the influence of the flowing gas on the plastic film and effectively reducing the energy consumption of the fan 603.

[0051] The working principle of this embodiment is as follows: before cutting the plastic film, the plastic film needs to be placed on the fixing table 3 and fixed by the fixing table 3. When all the adsorption holes 306 on a top plate 305 are not blocked by the plastic film, that is, the plastic film is not in contact with the top plate 305, when negative pressure is applied to the inside of the base 302, the external gas will pass through the adsorption holes 306. At this time, the gas enters the T-shaped hole 4 through the flow hole 310 and applies downward pressure to the blocking ball 401, so that the blocking ball 401 blocks the T-shaped hole 4, thereby blocking the base 302 that is not in contact with the plastic film and the suction cup pressure holding chamber 5, thereby ensuring the airtightness of the suction cup pressure holding chamber 5.

[0052] The top plate 305 in contact with the plastic film is divided into two situations:

[0053] The first type: the adsorption hole 306 is completely blocked by the plastic film, and the blocking piece 307 does not move at this time, and can directly form a good airtightness with the inside of the suction cup pressure-maintaining cavity 5 through the plastic film;

[0054] The second type: a part of the adsorption holes 306 on the top plate 305 is blocked by the plastic film, and the remaining adsorption holes 306 will be blocked by the blocking sheet 307. At this time, the negative pressure inside the base 302 will adsorb the thin film 309, which can make the adsorption holes 306 generate suction to the outside to deform the thin film. At this time, the space between the thin film 309 and the plastic film will be in a negative pressure state, so that the adsorption holes 306 can adsorb and fix the plastic film.

[0055] The sealing component in this scheme can be set in a larger base 302, and the sealing sheet 307 is made of rubber material, and the structure of the thin sheet 309 is relatively easy to implement, which can effectively reduce the processing difficulty, and then it can be achieved to open more dense adsorption holes 306 on the top plate 305, which can effectively reduce the concave situation of the plastic film when the plastic film is adsorbed and fixed.

[0056] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A packaging film laser cutting device for plastic packaging, comprising a body (1), characterized in that: Also includes: A fixed platform (3) composed of a plurality of adsorption blocks (301) and mounted on a machine body (1), wherein the adsorption block (301) comprises a base (302) and an elastic shrink ring (303) mounted on the base (302), a top plate (305) being fixedly mounted on the shrink ring (303), and a plurality of adsorption holes (306) being provided on the top plate (305); A blocking piece (307) installed in the base (302), the blocking piece (307) being provided with a through hole (308) corresponding to the adsorption hole (306), the through hole (308) being provided with a thin sheet (309) having elasticity for blocking the through hole (308), and the blocking piece (307) being provided with a plurality of flow holes (310) staggered with the adsorption hole (306); A blocking component is installed in the base (302), and when the top of at least one adsorption hole (306) is blocked, the blocking component blocks the remaining adsorption holes (306).

2. The packaging film laser cutting device for plastic packaging according to claim 1, characterized in that: The blocking assembly comprises a first driving cylinder (311) fixedly mounted inside the base (302), a first sealing block (312) being slidably mounted inside the first driving cylinder (311), a driving rod (313) being fixedly mounted on the first sealing block (312), the driving rod (313) passing through the top of the first driving cylinder (311) and being rotatably mounted with a connecting disk (314), the connecting disk (314) being fixedly connected to the blocking piece (307), a plurality of first springs (315) being fixedly mounted in a circular array between the first driving cylinder (311) and the connecting disk (314), at least two groups of release assemblies being mounted inside the base (302), the angle between the two groups of release assemblies being 90°, and the release assemblies driving the blocking piece (307) to move in a direction close to the adsorption hole (306) when the connecting disk (314) is rotated.

3. The packaging film laser cutting device for plastic packaging according to claim 2, characterized in that: The release assembly includes a second driving cylinder (316) fixedly mounted on the base (302), a second sealing block (317) slidably mounted inside the second driving cylinder (316), a second spring (318) fixedly mounted between the second sealing block (317) and the second driving cylinder (316), the first driving cylinder (311) and the second driving cylinder (316) are connected via a first delivery pipe (319), a valve assembly (320) is fixedly mounted on the first delivery pipe (319), and the opening and closing state of the valve assembly (320) is controlled according to the force balance state of the connecting disk (314).

4. The packaging film laser cutting device for plastic packaging according to claim 3, characterized in that: The valve assembly (320) includes a valve body (321), a slide groove (322) is provided in the valve body (321), a valve core (323) is slidably installed in the slide groove (322), the valve core (323) has slots (324) on both the upper and lower sides, a pressure rod (325) is fixedly installed on the valve core (323), the pressure rod (325) passes through the top of the valve body (321) and is fixedly installed with a connecting rope (327), a third spring (326) is fixedly installed between the pressure rod (325) and the valve body (321), a transmission rod (328) is fixedly installed on the connecting rope (327), and the other end of the transmission rod (328) is rotatably connected to the connecting disk (314).

5. The packaging film laser cutting device for plastic packaging according to claim 4, characterized in that: The first drive cylinder (311), the second drive cylinder (316), the first delivery pipe (319) and the valve assembly (320) are all filled with hydraulic medium, and an oil return control assembly is installed between the first drive cylinder (311) and the second drive cylinder (316).

6. The packaging film laser cutting device for plastic packaging according to claim 5, characterized in that: The oil return control assembly includes a second delivery pipe (329) fixedly mounted between the first drive cylinder (311) and the second drive cylinder (316); a pressurizing valve group (330) is mounted on the second delivery pipe (329); the pressurizing valve group (330) includes a hollow block (331) fixedly mounted on the second delivery pipe (329); a hole connected to the second delivery pipe (329) is provided on the hollow block (331); a sliding rod (332) is slidably mounted in the hollow block (331); a plugging head (333) having an aperture consistent with that of the hole is fixedly mounted on the sliding rod (332); a fourth spring (334) is fixedly mounted between the plugging head (333) and the hollow block (331); the elastic coefficient of the fourth spring (334) is greater than that of the second spring (318).

7. The packaging film laser cutting device for plastic packaging according to claim 1, characterized in that: The base (302) is provided with a T-shaped hole (4), a sealing ball (401) is movably installed in the T-shaped hole (4), a fifth spring (402) is fixedly installed between the sealing ball (401) and the base (302), a filter (403) is fixedly installed on the T-shaped hole (4), a suction cup pressure-maintaining chamber (5) is fixedly installed in the body (1), the suction cup pressure-maintaining chamber (5) is communicated with the T-shaped hole (4), and the suction cup pressure-maintaining chamber (5) is connected to the air pump system.

8. The packaging film laser cutting device for plastic packaging according to claim 1, characterized in that: Two first slide rails (2) are fixedly mounted on the machine body (1), a first support block (201) is mounted on the first slide rails (2), a first driving mechanism for driving the first support block (201) to move along the first slide rails (2) is mounted in the machine body (1), a second slide rail (202) is fixedly mounted on the two first support blocks (201), a second support block (203) is slidably mounted on the second slide rail (202), a second driving mechanism for driving the second support block (203) to move along the second slide rail (202) is mounted in the machine body (1), and a laser (204) is fixedly mounted on the second support block (203).

9. The packaging film laser cutting device for plastic packaging according to claim 8, characterized in that: Wind guide covers (6) are fixedly installed on both sides of the machine body (1), a filter (601) is fixedly installed inside the machine body (1), both ends of the filter (601) are connected to the wind guide covers (6) on both sides through air pipes (602), a fan (603) is fixedly installed on one of the air pipes (602), and a wind direction adjustment component for adjusting the exhaust position of the wind guide cover (6) according to the position of the laser (204) is installed inside the wind guide cover (6).

10. The packaging film laser cutting device for plastic packaging according to claim 9, characterized in that: The wind direction adjustment component comprises two first telescopic plates (7) slidably mounted in the wind guide cover (6), a connecting block (701) is fixedly mounted between the two telescopic plates (7), an air hole (702) is provided on the connecting block (701), a sliding groove (703) is provided at the bottom of the wind guide cover (6), two second telescopic plates (704) are slidably mounted in the sliding groove (703), a rectangular block (705) is fixedly mounted between the second telescopic plates (704), a connecting strip (706) is fixedly mounted on the rectangular block (705), and the other end of the connecting strip (706) is fixedly connected to the first support block (201).

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