Laser processing device for tearing opening of composite plastic package

Abstract

The utility model discloses a laser processing device for a composite plastic package tearing opening, which comprises a transportation mechanism, a laser processing mechanism and a laser processing mechanism, the transportation mechanism comprises a transportation frame, a transportation roller, an unwinding roller and a winding roller, the transportation frame is divided into a bottom-layer transportation frame, a middle-layer transportation frame and a top-layer transportation frame from bottom to top, and the unwinding roller and the winding roller are connected to the bottom-layer transportation frame; the multiple conveying rollers are connected to the middle-layer conveying frame and the top-layer conveying frame correspondingly. The laser cutting mechanism comprises a rack and a laser cutting component connected to the rack; the adjusting mechanism comprises an adjusting roller, a pushing assembly, a moving assembly and a limiting assembly, the adjusting roller is connected to the middle-layer conveying frame through a mounting block, the moving assembly is connected to the adjusting roller, the pushing assembly is connected to the middle-layer conveying frame and used for pushing the adjusting roller to move, and the tension of the composite plastic on the adjusting roller can be adjusted through movement of the adjusting roller; the limiting assembly is connected to the middle-layer conveying frame and used for limiting movement of the adjusting roller after the adjusting roller moves to the needed position.

Description

Technical Field

[0001] The utility model belongs to the technical field of sanitary napkin packaging, and particularly relates to a laser processing device for a tear opening of a composite plastic package. Background Art

[0002] Composite plastics are usually a new material formed by combining two or more different types of plastics through a certain process method. Composite plastics are usually used in the packaging industry, the automotive industry, the electronic and electrical industry, etc. In the packaging industry, composite plastic packaging bags utilize the combination of the barrier properties, printing properties, and heat-sealing properties of different plastics to meet the packaging requirements of various products such as sanitary products, food, medicine, and cosmetics.

[0003] The composite plastic packaging bag of sanitary napkins is a plastic product used to package sanitary napkins. In order to improve the convenience of use for users, a tear opening is usually processed on the composite plastic packaging bag to facilitate the user to take out the items in the packaging bag. In the prior art, there are usually two methods to produce the tear opening of the sanitary napkin packaging bag. One is to cut it with a cold cutting tool, and the other is to cut a tear line on the packaging bag by using laser technology to form a tear opening. When laser processing the tear opening of the composite plastic packaging bag, if the tension is unstable during the transportation of the composite plastic, the quality of the tear line formed by the laser on the composite plastic cannot be guaranteed. When the user tears the packaging bag along the tear line, it is easy to tear the plastic around the tear opening, and also tear off the part that should not be torn. Summary of the Utility Model

[0004] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a laser processing device for a tear opening of a composite plastic package to solve the above problems.

[0005] A laser processing device for a tear opening of a composite plastic package, comprising:

[0006] A transportation mechanism, the transportation mechanism includes a transportation frame, transportation rollers, an unwinding roller, and a winding roller. The transportation frame is divided into a bottom transportation frame, a middle transportation frame, and a top transportation frame from bottom to top. The unwinding roller and the winding roller are connected to the bottom transportation frame, and a plurality of the transportation rollers are respectively connected to the middle transportation frame and the top transportation frame;

[0007] A laser cutting mechanism, the laser cutting mechanism includes a machine frame and a plurality of laser cutting components connected to the machine frame. The laser cutting components correspond to the composite plastic on the transportation rollers;

[0008] Adjusting mechanism, the adjusting mechanism includes an adjusting roller, a pushing component, a moving component and a limiting component. The adjusting roller is connected to the middle-layer transport rack through a mounting block. The moving component is connected to the adjusting roller and is used to assist the movement of the adjusting roller. The pushing component is connected to the middle-layer transport rack and is used to push the adjusting roller to move. By moving the adjusting roller, the tension of the composite plastic on the adjusting roller can be adjusted. The limiting component is connected to the middle-layer transport rack and is used to limit the movement of the adjusting roller after the adjusting roller moves to the required position.

[0009] Preferably, the transport rollers include two synchronous transport rollers located on the top-layer transport rack and two asynchronous transport rollers located on the middle-layer transport rack.

[0010] Preferably, the pushing component includes a pushing cylinder and a pushing cylinder mounting component.

[0011] Preferably, the moving component includes a slider, and the slider is connected to the mounting block;

[0012] Wherein, a chute is provided on the middle-layer transport rack, and the slider can move in the chute.

[0013] Preferably, the limiting component includes a mounting plate, a positioning block, a positioning plate, a limiting post, a pressing plate and a spring;

[0014] Wherein, the mounting plate is connected to the mounting block, the positioning block is connected to the lower surface of the mounting plate, and a limiting hole is provided on the positioning block;

[0015] The positioning plate is connected to the side of the middle-layer transport rack. A cavity is provided on the positioning plate. The spring is arranged in the cavity and is connected to the bottom of the cavity. The pressing plate is arranged in the cavity and is connected to the top of the spring. A lifting channel is provided on the positioning plate, and the lifting channel is communicated with the cavity. The limiting post passes through the lifting channel and is connected to the pressing plate;

[0016] Wherein, under the action of the spring, the limiting post can be inserted into the limiting hole on the positioning block.

[0017] Preferably, one such mounting block is provided at each end of the adjusting roller, and one such limiting component is connected to both sides of each mounting block;

[0018] Wherein, a channel is provided on the middle-layer transport rack corresponding to each mounting block, and the pressing plate in the limiting component can pass through the channel.

[0019] Preferably, the limiting component includes a plurality of positioning blocks, a plurality of limiting columns and a plurality of springs, and the positioning blocks correspond to the limiting columns one by one.

[0020] Preferably, the middle layer transport rack is provided with insertion holes, the insertion holes communicate with the channels, and a lifting column is connected in the insertion holes, and the lifting column is connected to the pressing plate;

[0021] Wherein, one end of the lifting column far from the pressing plate is provided with symmetric inclined surfaces.

[0022] Preferably, a plurality of the laser cutting components are located on the same level on the frame, and the laser cutting components are connected to the control unit.

[0023] Compared with the existing technology, a laser processing device for composite plastic packaging tear openings provided by the present utility model can adjust the tension of the composite plastic being conveyed during the process of laser processing the tear openings of the composite plastic packaging by using the adjusting mechanism, so that the quality of the tear openings of the processed composite plastic packaging meets the standards. The adjustment principle is to use the pushing component to push the adjusting roller, so that the adjusting roller can move relatively, and then the composite plastic on the adjusting roller is tightened. After the composite plastic is tightened, the laser cutting component is used to process the tear opening. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the description of the embodiments. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0025] Figure 1 is a schematic structural diagram of the laser processing device provided by the present utility model;

[0026] Figure 2 is a schematic state diagram of the composite plastic on the laser processing device provided by the present utility model;

[0027] Figure 3 is a schematic structural diagram of the adjusting mechanism provided by the present utility model;

[0028] Figure 4 is a cross-sectional view of the adjusting mechanism provided by the present utility model;

[0029] Figure 5 is a cross-sectional view of the middle layer transport rack provided by the present utility model;

[0030] Figure 6 is a schematic structural diagram of the lifting column provided by the present utility model;

[0031] Main reference numerals:

[0032] 1 - Transport mechanism, 2 - Laser cutting mechanism, 3 - Adjusting mechanism, 11 - Transport rack, 12 - Transport roller, 13 - Unwinding roller, 14 - Rewinding roller, 111 - Bottom transport rack, 112 - Middle transport rack, 113 - Top transport rack, 21 - Frame, 22 - Laser cutting component, 23 - Control unit, 31 - Adjusting roller, 32 - Pushing component, 33 - Moving component, 34 - Limiting component, 35 - Mounting block, 121 - Synchronous transport roller, 122 - Asynchronous transport roller, 100 - Composite plastic, 1120 - Chute, 341 - Mounting plate, 342 - Positioning block, 343 - Positioning plate, 345 - Limiting column, 346 - Pressing plate, 347 - Spring, 3430 - Cavity, 3431 - Lifting channel, 1121 - Channel, 1122 - Jack, 348 - Lifting column. Detailed implementation manner

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0035] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there are descriptions of the terms "first", "second", "third", etc., they are only for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. The embodiments of the present utility model will be described below according to its overall structure.

[0037] Refer to Figure 1 and Figure 2 , a laser processing device for the tear opening of composite plastic packaging, comprising: a transportation mechanism 1, a laser cutting mechanism 2, and an adjustment mechanism 3.

[0038] The transportation mechanism 1 includes a transportation frame 11, transportation rollers 12, an unwinding roller 13, and a winding roller 14. The transportation frame 11 is divided into a bottom transportation frame 111, a middle transportation frame 112, and a top transportation frame 113 from bottom to top. The unwinding roller 13 and the winding roller 14 are connected to the bottom transportation frame 111, and multiple transportation rollers 12 are respectively connected to the middle transportation frame 112 and the top transportation frame 113.

[0039] The laser cutting mechanism 2 includes a machine frame 21 and a plurality of laser cutting components 22 connected to the machine frame 21. The laser cutting components 22 correspond to the composite plastic on the transportation rollers 12 so that the composite plastic can be cut.

[0040] The adjustment mechanism 3 includes an adjustment roller 31, a pushing component 32, a moving component 33, and a limiting component 34. The adjustment roller 31 is connected to the middle transportation frame 112 through a mounting block 35. The moving component 33 is connected to the adjustment roller 31, and the moving component 33 is used to assist the movement of the adjustment roller 31. The pushing component 32 is connected to the middle transportation frame 112 to push the adjustment roller 31 to move. By moving the adjustment roller 31, the tension of the composite plastic on the adjustment roller 31 can be adjusted. The limiting component 34 is connected to the middle transportation frame 112, and the limiting component 34 is used to limit the movement of the adjustment roller 31 when the adjustment roller 31 moves to the required position, so that the adjustment roller 31 no longer moves.

[0041] The unwinding roller 13 is provided with the wound composite plastic 100. When the unwinding roller 13 rotates, it can unwind the composite plastic 100 thereon. The winding roller 14 winds up the composite plastic 100 released by the unwinding roller 13 and winds the composite plastic 100 onto the winding roller 14. The transport roller 12 plays a role in transporting the composite plastic 100 during the unwinding and winding processes of the composite plastic 100. The laser cutting component 22 performs laser cutting and marking on the composite plastic 100 during the unwinding process of the composite plastic 100.

[0042] Refer to Figure 1 and Figure 2 In a preferred embodiment, the transport roller 12 includes two synchronous transport rollers 121 located on the top-layer transport rack 113 and two asynchronous transport rollers 122 located on the middle-layer transport rack 112.

[0043] Among them, the two synchronous transport rollers 121 on the top-layer transport rack 113 rotate in the same direction, and the two asynchronous transport rollers 122 on the middle-layer transport rack 112 rotate in different directions. The two asynchronous transport rollers 122 can play a role in tightening the transport of the composite plastic 100, so that the composite plastic 100 can be in a non-loose state and in a tensioned state when being transported on the transport roller.

[0044] Refer to Figure 3 In a preferred embodiment, the pushing assembly 32 includes a pushing cylinder and a pushing cylinder mounting component. The pushing cylinder is used to push the mounting block 35 on the middle-layer transport rack 112, and then push the adjusting roller 31 on the mounting block 35. Among them, using the pushing cylinder can achieve automatic pushing. In addition, the mounting block 35 can also be pushed manually.

[0045] Refer to Figure 3 and Figure 4 In a preferred embodiment, the moving assembly 33 includes a slider and a mounting component for mounting the slider. The slider is connected to the mounting block 35. Among them, a chute 1120 is provided on the middle-layer transport rack 112, and the slider can move within the chute 1120.

[0046] Refer to Figure 3 and Figure 4 In a preferred embodiment, the limiting assembly 34 includes a mounting plate 341, a positioning block 342, a positioning plate 343, a limiting post 345, a pressing plate 346, and a spring 347.

[0047] Refer to Figure 3 and Figure 4 Among them, the mounting plate 341 is connected to the mounting block 35, the positioning block 342 is connected to the lower surface of the mounting plate 341, and a limiting hole is provided on the positioning block 342.

[0048] The positioning plate 343 is connected to the side of the middle-level transport frame 112. The positioning plate 343 and the middle-level transport frame 112 can be integrally arranged, or can be detachably connected to the middle-level transport frame 112. A cavity 3430 is opened on the positioning plate 343. The spring 347 is arranged in the cavity 3430 and connected to the bottom of the cavity 3430. The pressure plate 346 is arranged in the cavity 3430 and connected to the top of the spring 347. A lifting channel 3431 is opened on the positioning plate 343. The lifting channel 3431 is connected to the cavity 3430. The limiting column 345 passes through the lifting channel 3431 and is connected to the pressure plate 346.

[0049] Wherein, under the action of the spring 347 , the limiting column 345 can be inserted into the limiting hole on the positioning block 342 .

[0050] Specifically, the limiting assembly 34 includes a plurality of positioning blocks 342 , a plurality of limiting columns 345 , and a plurality of springs 347 , and the positioning blocks 342 correspond to the limiting columns 345 one by one.

[0051] Specifically, the positioning plate 343 is connected to the side of the middle-level transport frame 112 and is lower than the upper surface of the middle-level transport frame 112, and the mounting plate 341 is lower than the bottom surface of the groove of the mounting block 35, so that the entire limiting assembly 34 avoids the parts of the axial end of the adjusting roller 31, thereby preventing it from affecting the axial end connection of the adjusting roller 31.

[0052] As a preferred embodiment, the limiting component 34 works as follows when limiting: when the adjusting roller 31 is moving, the pressure plate 346 is pressed downward, so that the limiting column 345 on the pressure plate 346 drops and is then pulled out from the limiting hole of the positioning block 342 on the mounting plate 341, so that the adjusting roller 31 is not fixed on the positioning plate 343 on the middle transport frame 112 and can be moved; when the adjusting roller 31 moves to the desired position, for example, when the adjusting roller 31 moves to the right to the first positioning block 342 on the left side of the mounting plate 341 is located on the upper surface of the second limiting column 345 on the left side of the positioning plate 343, the adjusting roller 31 is loosened at this time. Open the pressure plate 346, and under the elastic force of the spring 347, the pressure plate 346 moves upward, and the first limiting column 345 on the left side of the positioning plate 343 moves upward and is offset from the first positioning block 342 on the left side of the mounting plate 341, and the second limiting column 345 on the left side of the positioning plate 343 is inserted into the limiting hole of the first positioning block 342 on the left side of the mounting plate 341, and the third limiting column 345 on the left side of the positioning plate 343 is inserted into the limiting hole of the second positioning block 342 on the left side of the mounting plate 341. In this way, the rightmost positioning block 342 on the mounting plate 341 has no limiting column 345 inserted therein.

[0053] See also Figure 1 ,Figure 3 and Figure 5 In a preferred embodiment, one mounting block 35 is provided at each end of the adjusting roller 31, and one limiting assembly 34 is connected to each side of each mounting block 35. Among them, a channel 1121 is provided on the middle layer conveyor frame 112 corresponding to each mounting block 35, and the pressing plate 346 in the limiting assembly 34 can pass through the channel 1121.

[0054] Specifically, two limiting assemblies 34 are provided at one end of the adjusting roller 31. The two limiting assemblies 34 share one pressing plate 346. One pressing plate 346 can pass from the left side to the right side of the middle layer conveyor frame 112 through the channel 1121 on the middle layer conveyor frame 112.

[0055] Refer to Figure 3 and Figure 5 In a preferred embodiment, a jack 1122 is provided on the middle layer conveyor frame 112. The jack 1122 communicates with the channel 1121 and is provided in the chute 1120. A lifting column 348 is connected in the jack 1122, and the lifting column 348 is connected to the pressing plate 346.

[0056] Refer to Figure 6 Among them, the end of the lifting column 348 far from the pressing plate 346 is provided with symmetric inclined surfaces 3480. Specifically, the lifting column 348 is a cylinder, and inclined surfaces are provided at the upper end part of the cylinder. The inclined surfaces can facilitate the lifting of the lifting column 348. Since the lifting column 348 is connected to the pressing plate 346 and a spring is provided at the bottom of the pressing plate 346, when the inclined surface 3480 of the lifting column 348 is pushed on the horizontal plane, the lifting column 348 is forced to slowly move downward, and the component pushing the lifting column 348 can cover the lifting column 348 during the pushing process, that is, the lifting column 348 completely descends into the channel 1121 and no longer extends into the chute 1120.

[0057] As a preferred embodiment, the working principle of the lifting column 348 is as follows: When the mounting block 35 is not pushed and the pressure plate 346 is not forced downward, under the elastic force of the spring 347, the pressure plate 346 is bounced up by the spring 347. At this time, the limit column 345 and the lifting column 348 are both bounced up and moved upward. The limit column 345 is inserted into the positioning block 342, and the lifting column 348 extends into the sliding groove 1120, which can restrict the slider in the sliding groove 1120. When the mounting block 35 is pushed forcefully to move, the lifting column 348 is stressed under the action of the thrust. Since the part of the lifting column 348 in contact with the slider is set as an inclined surface, when the mounting block 35 is pushed to the right, the slider can squeeze the upper part of the lifting column 348, thereby causing the lifting column 348 to move downward. When the lifting column 348 moves downward, the pressure plate 346 also moves downward accordingly. When the pressure plate 346 moves downward, the limit column 345 also moves downward and is withdrawn from the positioning block 342.

[0058] Refer to Figure 1 and Figure 2 , in a preferred embodiment, a plurality of the laser cutting components 22 are located on the same level on the frame 21, and the laser cutting components 22 are connected to the control unit 23.

[0059] Next, in combination with Figures 1 - 6 , the working principle of the laser processing device in the present invention will be described in detail to enable those skilled in the art to better understand the present invention. The specific description is as follows:

[0060] As Figure 1 and Figure 2 shown, when the axes of the transport rollers 12 on the rightmost side of the top transport frame 113, the adjusting roller 31 on the middle transport frame 112, and the unwinding roller 13 on the bottom transport frame 111 are all on the same straight line, at this time, for the composite plastic 100 on the transport frame 11, it is completely tightened during transportation by the two asynchronous transport rollers 122 and the unwinding roller 13.

[0061] As Figure 1 and Figure 2 shown, when the adjusting roller 31 is pushed to the right, the axis of the adjusting roller 31 on the middle transport frame 112 is not on the same straight line as the axes of the transport roller 12 on the rightmost side of the top transport frame 113 and the unwinding roller 13 on the bottom transport frame 111, and its axis is shifted to the right. Thus, the tension of the composite plastic 100 on the transport roller 12 is increased, so that the composite plastic 100 can be tightened during transportation. Subsequently, the control unit 23 controls the laser parameters in the laser cutting component 22, and then processes the tear opening of the composite plastic 100 being transported. Since the adjusting roller 31 is set to be adjustable, in the actual production process, the tension of the composite plastic on the transport roller can be adjusted as needed.

[0062] In summary, a laser processing device for the tear opening of composite plastic packaging provided by the present utility model can adjust the tension of the composite plastic being conveyed during the process of laser processing the tear opening of the composite plastic packaging bag, so as to make the quality of the tear opening of the processed composite plastic packaging bag meet the standards.

[0063] The foregoing description of the specific exemplary embodiments of the present utility model is for the purposes of illustration and exemplification, and these descriptions are not intended to limit the present utility model to the precise forms disclosed. Obviously, many changes and variations can be made in accordance with the above teachings. Although the embodiments of the present utility model have been shown and described, the specific embodiments are merely interpretations of the present utility model and not limitations thereof. The specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present utility model and its practical applications, so that those skilled in the art can, after reading this specification, make modifications, substitutions, variations, and various different selections and changes that do not make creative contributions to the embodiments as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. A laser processing device for tearing composite plastic packaging, characterized in that: include: A transport mechanism, wherein the transport mechanism comprises a transport frame, a transport roller, a reeling roller and a reeling roller, wherein the transport frame is divided into a bottom transport frame, a middle transport frame and a top transport frame from bottom to top, wherein the reeling roller and the reeling roller are connected to the bottom transport frame, and a plurality of transport rollers are respectively connected to the middle transport frame and the top transport frame; A laser cutting mechanism, the laser cutting mechanism comprising a frame and a plurality of laser cutting components connected to the frame, the laser cutting components corresponding to the composite plastic on the transport roller; An adjusting mechanism, the adjusting mechanism includes an adjusting roller, a pushing component, a moving component and a limiting component, the adjusting roller is connected to the middle-level transport frame through a mounting block, the moving component is connected to the adjusting roller, the moving component is used to assist the movement of the adjusting roller, the pushing component is connected to the middle-level transport frame to push the adjusting roller to move, the movement of the adjusting roller can adjust the tension of the composite plastic on the adjusting roller, the limiting component is connected to the middle-level transport frame, and the limiting component is used to limit the movement of the adjusting roller after the adjusting roller moves to a desired position.

2. The laser processing device for tearing a composite plastic package according to claim 1, characterized in that: The transport rollers include two synchronous transport rollers located on the top transport frame and two asynchronous transport rollers located on the middle transport frame.

3. The laser processing device for tearing a composite plastic package according to claim 1, characterized in that: The pushing assembly includes a pushing cylinder and a pushing cylinder mounting component.

4. The laser processing device for tearing a composite plastic package according to claim 1, characterized in that: The moving assembly includes a slider, and the slider is connected to the mounting block; Wherein, a slide groove is arranged on the middle transport rack, and the slider can move in the slide groove.

5. The laser processing device for tearing a composite plastic package according to claim 1, characterized in that: The limiting assembly includes a mounting plate, a positioning block, a positioning plate, a limiting column, a pressure plate and a spring; Wherein, the mounting plate is connected to the mounting block, the positioning block is connected to the lower surface of the mounting plate, and a limiting hole is provided on the positioning block; The positioning plate is connected to the side of the middle transport rack, a cavity is formed on the positioning plate, the spring is arranged in the cavity and connected to the bottom of the cavity, the pressing plate is arranged in the cavity and connected to the top of the spring, a lifting channel is formed on the positioning plate, the lifting channel is connected to the cavity, and the limiting column passes through the lifting channel and is connected to the pressing plate; Wherein, under the action of the spring, the limiting column can be inserted into the limiting hole on the positioning block.

6. The laser processing device for tearing composite plastic packaging according to claim 5, characterized in that: The two ends of the adjusting roller are respectively provided with a mounting block, and both sides of each mounting block are connected with a limiting component; Wherein, a channel is provided on the middle transport rack corresponding to each mounting block, and the pressure plate in the limiting assembly can pass through the channel.

7. The laser processing device for tearing a composite plastic package according to claim 5, characterized in that: The limiting assembly includes a plurality of positioning blocks, a plurality of limiting columns and a plurality of springs, and the positioning blocks correspond to the limiting columns one by one.

8. The laser processing device for tearing a composite plastic package according to claim 6, characterized in that: The middle transport rack is provided with a socket, the socket is connected to the channel, a lifting column is connected to the socket, and the lifting column is connected to the pressing plate; Wherein, an end of the lifting column away from the pressing plate is arranged to have a symmetrical inclined surface.

9. The laser processing device for tearing a composite plastic package according to claim 1, characterized in that: The plurality of laser cutting components are located at the same level on the frame, and the laser cutting components are connected to a control unit.

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