Low-deviation paper-plastic composite bag bonding device and bonding method

Abstract

The invention relates to a low-deviation paper-plastic composite bag bonding device and method.The low-deviation paper-plastic composite bag bonding device comprises a workbench and a conveying belt which is arranged on the workbench and used for conveying a plastic layer, a gluing barrel is rotationally arranged on the workbench, and a glue box is fixedly arranged above the gluing barrel; a plurality of containing cavities used for bearing glue are formed in the gluing barrel, glue pushing assemblies are arranged in the containing cavities and comprise glue pushing plates and a plurality of glue leaking holes formed in the containing cavities, guide assemblies are arranged on the rotating paths of the glue pushing plates, a glue scraping plate is arranged on one side of the gluing barrel, and a glue uniformizing assembly and a glue blowing assembly are arranged on the glue scraping plate. The glue uniformizing assembly comprises glue uniformizing plates arranged on the two sides of the glue scraping plate in a sliding mode, the diffusion range of glue is controlled, it is guaranteed that the glue is flatly and evenly laid on a plastic layer, air is blown to the walls of the glue scraping plates, the glue flows in a wave-shaped gushing mode, the space formed by the glue scraping plate and the glue uniformizing plates is filled with the glue, and the laying face of the glue is smoother and more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of paper-plastic bag processing, and more particularly to a precision structural part of an explosion-proof lamp and a gluing device for gluing the same. Background Art

[0002] Paper-plastic bags are made of plastic and kraft paper. Glue is applied to the surface of the plastic layer and then bonded to the kraft paper. During bonding, glue is usually applied to the plastic layer and then applied with a brush. When the brush is brushing the glue from one end of the plastic layer to the other end, the glue will initially diffuse to both sides, causing the glue to be thin in the middle of the plastic layer and accumulate on both sides. The accumulated glue needs to be repeatedly brushed flat, and the front glue laying surface is very flat. As the amount of glue decreases, the rear glue laying surface gradually shrinks to the middle, forming a triangle shape, and the glue laying is incomplete.

[0003] The Chinese patent with publication number CN115318553A discloses a paper-plastic bonding device and method for packaging bag production and processing. By starting two linear modules to drive the bonding tube to move horizontally in the same direction, the glue inside the liquid outlet tube drips onto the top surface of the plastic layer under the action of gravity, and cooperates with the horizontal movement of the bonding tube, so that the brushes arranged on both sides of the liquid outlet tube can brush the dripping glue evenly. By dripping glue in sections on the surface of the plastic layer, uneven glue is avoided in the front and rear sections of the plastic layer, the process of repeated glue brushing in the later stage is reduced, and the efficiency of glue brushing is improved. Although the bonding device avoids repeated glue brushing, the glue will diffuse to both sides when the brush is used to brush the glue, resulting in the glue on the plastic layer being thin in the middle but accumulated on both sides after brushing. Uneven bonding and overflow of glue occur when bonding with kraft paper, which reduces the overall quality of the paper-plastic bag. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies in the prior art and provide a low-deviation paper-plastic composite bag bonding device, which pushes glue from a containing cavity to flow to the surface of a plastic layer through a glue pushing plate, and at the same time draws glue into an empty containing cavity through a glue pushing plate at a glue box, thereby realizing automatic glue pushing and glue filling, and leveling the glue through a scraper plate, and a leveling plate reciprocatingly slides on the scraper plate to control the diffusion range of the glue, thereby ensuring that the glue is evenly and evenly laid on the plastic layer, and blowing air on the inner wall of the scraper plate through a glue blowing component, so that the glue flows in a wavy and surging shape, filling the space between the scraper plate and the leveling plate, thereby making the glue laying surface more flat and uniform.

[0005] The technical solutions of the present invention are as follows: A low-deviation paper-plastic composite bag bonding device comprises a workbench and a conveyor belt arranged on the workbench for conveying a plastic layer, a glue-applying cylinder is rotatably arranged on the workbench, a glue box is fixedly arranged above the glue-applying cylinder, a plurality of accommodating cavities for carrying glue liquid are provided on the glue-applying cylinder, a glue-pushing assembly is arranged in the accommodating cavity, the glue-pushing assembly comprises a glue-pushing plate and a plurality of glue-leaking holes arranged on the accommodating cavity, a guide assembly is arranged on the rotation path of the glue-pushing plate, a glue-scraping plate is arranged on one side of the glue-applying cylinder, and the scraper A glue spreading component and a glue blowing component are arranged on the glue plate, and the glue spreading component includes glue spreading plates slidably arranged on both sides of the scraper plate. The glue pushing component, in cooperation with the guide component, enables the glue pushing plate to push the glue from the glue leakage hole to the plastic layer, and at the same time, the glue is drawn into the accommodating cavity through the glue pushing plate at the glue box. The glue spreading component is used to control the diffusion range of the glue during the reciprocating sliding of the glue spreading plate when the scraper plate is scraping glue, and the glue blowing component is used to blow air to the side wall of the scraper plate when the scraper plate is scraping glue, so that the glue flows in a wave-like surging state.

[0006] As a preference, the rubber pushing assembly further comprises a through groove opened on the accommodating cavity, a connecting rod slidably arranged in the through groove, the rubber pushing plate cooperates with the accommodating cavity, the bottom of the connecting rod is configured to be spherical and the connecting rod is fixedly connected to the rubber pushing plate.

[0007] As a preferred embodiment, a rotating shaft is fixedly provided on both sides of the upper glue cylinder, and the guide assembly includes fixed plates fixedly provided on both sides of the workbench, a fixed shaft fixedly provided between the fixed plates, and a guide rail fixedly provided on the fixed shaft, the guide rail is composed of a descending section and an ascending section, the connecting rod cooperates with the guide rail, and the rotating shaft is rotatably provided between the fixed plates and rotatably provided on the fixed shaft.

[0008] As a preferred embodiment, the glue spreading assembly also includes a first bevel tooth fixedly arranged on a rotating shaft, a rotating rod rotatably arranged on a workbench, a second bevel tooth fixedly arranged on both sides of the rotating rod, a guide cylinder rotatably arranged on the workbench, a guide groove opened on the guide cylinder, a guide rod fixedly arranged on the glue spreading plate, and a third bevel tooth fixedly arranged on the guide cylinder. The bottom of the guide rod is spherical and cooperates with the guide cylinder. The first bevel tooth and the third bevel tooth are both meshed with the second bevel tooth. The glue spreading plates are connected by extension rods.

[0009] As a preferred embodiment, the glue blowing assembly includes a cylinder fixedly arranged on a workbench, a piston slidably arranged in the cylinder, a rectangular rod fixedly arranged on the piston, a reciprocating screw rotatably arranged on the workbench, a nut slidably arranged on the reciprocating screw, an air blowing pipe fixedly arranged on the cylinder, and an air blowing head obliquely arranged on the air blowing pipe, and the nut is fixedly connected to the rectangular rod.

[0010] As a preferred embodiment, a baffle is fixedly provided on the glue box and a through opening is opened on the baffle, the inner wall of the baffle is in contact with the outer wall of the upper glue cylinder, the scraper is fixedly provided on the baffle, and a chamfer is provided on the baffle.

[0011] As a preference, the guide groove is configured as a wave-shaped groove structure.

[0012] As a preference, the scraper is made of rubber material.

[0013] Another design objective of the present invention is to provide a low-deviation paper-plastic composite bag bonding method, which specifically comprises the following steps: Step 1: When the glue cylinder rotates, it drives the connecting rod to slide on the guide rail, so that the glue pusher plate allows the glue in the accommodating chamber to flow through the glue leakage hole to the surface of the plastic layer being transmitted on the conveyor belt, and at the same time, the glue pusher plate at the glue box draws the glue from the glue box into the accommodating chamber; Step 2: When the scraper is scraping the glue, the glue spreading plate is moved back and forth on both sides of the scraper through the guide cylinder to control the diffusion range of the glue; Step 3: The piston is driven to move back and forth in the cylinder by the reciprocating screw rod, so that the air blowing head blows air onto the side wall of the scraper plate, causing the glue to flow in a wave-like surging state.

[0014] The beneficial effects of the present invention are 1. The present invention is provided with a glue pushing component and a guide component, by which the effects of automatic glue pushing and glue filling are achieved, and the accommodating cavities are arranged at intervals, so that the glue can drip in sections, ensuring that the glue is evenly laid on the surface of the plastic layer.

[0015] 2. The present invention is provided with a glue spreading component and a glue blowing component. When the scraper is scraping glue, air is blown to the side wall of the scraper to make the glue flow in a wave-like surging state, so that the glue fills the space formed by the scraper and the glue spreading board. With the structure of the glue spreading board gradually retreating, the glue is laid more smoothly, preventing the occurrence of a triangular laying surface and inconsistent laying surfaces of the front and rear sections of the glue.

[0016] In summary, the present invention has the advantages of smooth glue laying and high efficiency, and is suitable for the technical field of paper-plastic bag processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 It is a structural schematic diagram of a low-deviation paper-plastic composite bag bonding device; Figure 2 is a schematic diagram of the structure of the accommodating cavity; Figure 3 It is a structural schematic diagram of the rubber push component and the guide component; Figure 4 It is a structural schematic diagram of the glue-spinning component; Figure 5 It is a structural schematic diagram of the glue blowing component; Figure 6 It is a schematic diagram of the state when the glue pusher passes through the descending section to draw glue into the accommodating cavity; Figure 7 It is a schematic diagram of the state when the glue pushing plate passes through the rising section to push out the glue; Figure 8 It is a schematic diagram of the state when the scraper is in contact with the glue and the glue leveling plate slides to the front side of the scraper; Fig. 9 It is a schematic diagram of the state when the glue leveling plate gradually retreats during the glue scraping process of the glue scraper; Fig.10 It is a schematic diagram of the state when the glue scraper is scraping the glue so that the front part of the glue is accumulated; Fig.11 This is a schematic diagram of the state when the piston injects gas into the blowing head for blowing; Fig.12 A schematic diagram of the state when the blowing head blows air to make the glue flow in a wave-like and surging manner; Fig.13 This is a schematic diagram of the state when the air blowing head cooperates with the glue leveling board to level the glue for laying; Figure numerals: 1 workbench, 2 plastic layer, 3 conveyor belt, 4 glue cylinder, 5 glue box, 6 accommodating chamber, 7 glue pushing assembly, 71 glue pushing plate, 72 glue leakage hole, 73 through groove, 74 connecting rod, 8 guide assembly, 81 fixed plate, 82 fixed shaft, 83 guide rail, 84 descending section, 85 ascending section, 9 scraper plate, 10 glue leveling assembly, 101 glue leveling plate, 102 first bevel gear, 103 rotating rod, 104 second bevel gear, 105 guide cylinder, 106 guide groove, 107 guide rod, 108 third bevel gear, 109 extension rod, 11 glue blowing assembly, 111 cylinder, 112 piston, 113 rectangular rod, 114 reciprocating screw rod, 115 nut, 116 air blowing pipe, 117 air blowing head, 12 rotating shaft, 13 baffle, 14 through hole, 15 chamfer. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0019] Embodiment 1

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0021] like Figures 1 to 13 As shown, a low-deviation paper-plastic composite bag bonding device comprises a workbench 1 and a conveyor belt 3 arranged on the workbench 1 for conveying a plastic layer 2, a glue-applying cylinder 4 is rotatably arranged on the workbench 1, a glue box 5 is fixedly arranged above the glue-applying cylinder 4, a plurality of accommodating chambers 6 for carrying glue liquid are provided on the glue-applying cylinder 4, a glue-pushing assembly 7 is arranged in the accommodating chamber 6, the glue-pushing assembly 7 comprises a glue-pushing plate 71 and a plurality of glue-leaking holes 72 arranged on the accommodating chamber 6, a guide assembly 8 is arranged on the rotating path of the glue-pushing plate 71, a glue-scraping plate 9 is arranged on one side of the glue-applying cylinder 3, a glue-spreading assembly 10 and a glue-blowing assembly 11 are arranged on the glue-scraping plate 9, and the glue-spreading assembly 10 comprises a sliding assembly arranged on The glue spreading plates 101 on both sides of the scraper plate 9 and the glue pushing assembly 7, in cooperation with the guide assembly 8, push the glue pushing plates 71 to push the glue from the glue leakage hole 72 to the plastic layer 2, and at the same time, the glue is drawn into the accommodating chamber 6 through the glue pushing plates 71 at the glue box 5. The glue spreading assembly 10 is used to control the diffusion range of the glue during the reciprocating sliding of the glue spreading plate 101 when the scraper plate 9 is scraping glue. The glue blowing assembly 11 is used to blow air on the side wall of the scraper plate 9 when the scraper plate 9 is scraping glue, so that the glue flows in a wave-like surging state. Among them, the conveyor belt 3 always drives the plastic layer 2 for transmission and a negative pressure device is provided on the conveyor belt 3 to adsorb the plastic layer 2 to prevent deviation during scraping glue.

[0022] It should be emphasized that if Figure 2 and Figure 3 As shown, the rubber pushing assembly 7 also includes a through groove 73 opened on the accommodating cavity 6, a connecting rod 74 slidably set in the through groove 73, the rubber pushing plate 71 cooperates with the accommodating cavity 6, the bottom of the connecting rod 74 is set to be spherical and the connecting rod 74 is fixedly connected to the rubber pushing plate 71.

[0023] In addition, if Figure 6 and Figure 7As shown, a rotating shaft 12 is fixedly arranged on both sides of the upper glue cylinder 4, and the guide assembly 8 includes a fixed plate 81 fixedly arranged on both sides of the workbench 1, a fixed shaft 82 fixedly arranged between the fixed plates 81, and a guide rail 83 fixedly arranged on the fixed shaft 82, wherein the guide rail 83 is composed of a descending section 84 and an ascending section 85, and the connecting rod 74 cooperates with the guide rail 83, and the rotating shaft 12 is rotatably arranged between the fixed plates 81 and rotatably cooperates with the fixed shaft 82, wherein a motor is arranged on one side of the fixed plate 81, and the rotating shaft 12 is connected to the motor through a belt, and when in use, the motor drives the rotating shaft 12 and the upper glue cylinder 4 to rotate, The connecting rod 74 is driven to slide on the guide rail 83. When the connecting rod 74 slides to the descending section 84, the connecting rod 74 and the rubber pushing plate 71 are driven to slide toward the guide rail 83, and the glue is drawn from the glue box 5 into the accommodating chamber 6 through the glue leakage hole 72. During the continued rotation, the connecting rod 74 passes through the ascending section 85, driving the rubber pushing plate 71 to slide away from the guide rail 83, and the glue in the accommodating chamber 6 flows to the plastic layer 2 through the leakage hole 72. In this way, the effect of automatic glue pushing and glue filling is achieved, and the accommodating chambers 6 are arranged at intervals, so that the glue can drip in sections to ensure that the glue is evenly laid on the surface of the plastic layer 2.

[0024] It is worth mentioning that Figures 8 to 10As shown, the glue-spinning assembly 10 also includes a first bevel gear 102 fixedly arranged on the rotating shaft 12, a rotating rod 103 rotatably arranged on the workbench 1, second bevel gears 104 fixedly arranged on both sides of the rotating rod 103, a guide cylinder 105 rotatably arranged on the workbench 1, a guide groove 106 provided on the guide cylinder 105, a guide rod 107 fixedly arranged on the glue-spinning plate 101, and a third bevel gear 108 fixedly arranged on the guide cylinder 105. The bottom of the guide rod 107 is set to be spherical and aligned with the guide groove. 106 cooperates, the first bevel gear 102 and the third bevel gear 108 are meshed with the second bevel gear 104, and the glue-spreading plates 101 are connected by an extension rod 109, wherein the initial state of the glue-spreading plate 101 is behind the scraper plate 9, and whenever a single accommodating cavity 6 slides out of the baffle 13 and slides from one end of the through-port 14 to the other end, the glue-spreading plate 101 slides to the front side of the scraper plate 9 to wrap the glue, and the glue-spreading plate 101 and the scraper plate 9 are sealed and matched, and the residual glue when the glue-spreading plate 101 retreats The glue is scraped off by the glue scraper 9. During use, when the glue dripping is completed, the glue scraper 9 and the glue leveling plate 101 in contact with the glue slide to the front side of the glue scraper 9. At this time, the glue scraper 9 and the glue leveling plate 101 wrap the glue. When the plastic layer 2 drives the glue to continue sliding, the glue scraper 9 flattens the glue. At this time, since the glue leveling plate 101 limits the glue and prevents the glue from spreading to both sides, the glue accumulates on the inner wall of the glue scraper 9, and the thickness of the glue close to the inner wall is higher than that away from the inner wall. The thickness of the side glue gradually decreases as the glue gradually adheres to the plastic layer 2 and the front glue is laid. In order to prevent the unevenness caused by the glue gradually shrinking toward the middle of the rear laying surface, the glue plate 101 gradually slides toward the other end of the scraper plate 9 during the continuous rotation of the guide cylinder 105, so that the glue plate 101 gradually cancels the action of restricting the diffusion of the glue, so that the remaining glue is completely laid on the plastic layer 2, and the glue will not be thin in the middle and piled up on both sides, so that the glue laying surface is uniform and flat.

[0025] Among them, Figures 11 to 13As shown, the glue blowing assembly 11 includes a cylinder 111 fixedly arranged on the workbench 1, a piston 112 slidably arranged in the cylinder 111, a rectangular rod 113 fixedly arranged on the piston 112, a reciprocating screw rod 114 rotatably arranged on the workbench 1, a nut 115 slidably arranged on the reciprocating screw rod 114, a blowing pipe 116 fixedly arranged on the cylinder 111, and a blowing head 117 tilted on the blowing pipe 116, the nut 115 is fixedly connected to the rectangular rod 113, wherein the reciprocating screw rod is connected to the motor through a belt. When in use, when the scraper plate 9 is scraping glue, the reciprocating screw rod 114 rotates, and the nut 115 drives the rectangular rod 113 and the piston 112 to slide back and forth in the cylinder 111, and the gas in the cylinder 111 is injected into the blowing head through the blowing pipe 116. 117, the inner wall of the scraper plate 9 is intermittently blown, and the glue that adheres to the inner wall of the scraper plate 9 is under pressure, and the glue flows to the rear of the airflow. At this time, the glue accumulation section is behind the airflow, rather than the place where it adheres to the scraper plate 9, which changes the state of the two always being in contact, so that the glue and the scraper plate 9 are intermittently attached. Under the action of intermittent blowing, the glue is in a wavy surging state, and the upper part of the accumulated section of the glue forms a surging state when it flows downward. When surging, the glue can flow to both sides, thereby filling the space formed by the scraper plate 9 and the glue leveling plate 101, making the glue laying more flat, preventing the glue from gradually shrinking to the middle on the rear laying surface due to the gradual reduction of the glue amount, so that the glue can be spread faster, and the glue leveling plate 101 can be gradually retreated to make the glue level laid flat.

[0026] It should be further explained that if Figure 3 As shown, a baffle 13 is fixedly provided on the glue box 5 and a through opening 14 is opened on the baffle 13. The inner wall of the baffle 13 fits with the outer wall of the upper glue cylinder 4. The scraper plate 9 is fixedly provided on the baffle 13. The baffle 13 is provided with a chamfer 15. When in use, the baffle 13 can prevent the glue in the accommodating chamber 6 from dripping before reaching the through opening 14, thereby playing a shielding role. In addition, in the process of the accommodating chamber 6 moving from one end of the through opening 14 to the other end, all the glue is pushed out, and the glue leveling plate 101 slides to the front side of the scraper plate 9 at the same time, thereby wrapping the glue. After the scraping of this section of glue is completed, the glue leveling plate 101 is located at the rear side of the scraper plate 9. When the next accommodating chamber 6 starts to drip glue, the glue leveling plate 71 repeats the above action and slides to the front side of the scraper plate 9 again to prepare for scraping glue. In addition, when the accommodating chamber 6 passes through the chamfer 15 after the glue dripping is completed, the chamfer 15 scrapes off the residual glue on the accommodating chamber 6.

[0027] It should be emphasized that if Figure 4 As shown, the guide groove 106 is configured as a wave-shaped groove structure, thereby driving the glue-distributing plate 101 to move back and forth.

[0028] It is worth mentioning that Figure 1As shown, the scraper blade 9 is made of rubber material, and the scraper blade 9 made of rubber material can prevent the plastic layer 2 from being damaged.

[0029] Embodiment 2

[0030] A low-deviation paper-plastic composite bag bonding method comprises the following steps: Step 1: When the glue cylinder 4 rotates, it drives the connecting rod 103 to slide on the guide rail 83, so that the glue pusher 71 allows the glue in the accommodating chamber 6 to flow to the surface of the plastic layer 2 being transported on the conveyor belt 3 through the glue leakage hole 72, and at the same time, the glue pusher 71 at the glue box 5 draws the glue from the glue box 5 into the accommodating chamber 6; Step 2: When the glue scraper 9 is scraping the glue, the glue spreading plate 101 is moved back and forth on both sides of the glue scraper 9 through the guide cylinder 105 to control the diffusion range of the glue; Step 3: The piston 112 is driven to reciprocate in the cylinder 111 by the reciprocating screw rod 114, so that the air blowing head 117 blows air onto the side wall of the scraper plate 9, so that the glue flows in a wave-like surging state.

[0031] Working process The motor drives the rotating shaft 12 and the glue cylinder 4 to rotate, and drives the connecting rod 74 to slide on the guide rail 83. When the connecting rod 74 slides to the descending section 84, it drives the connecting rod 74 and the glue pushing plate 71 to slide in the direction close to the guide rail 83, and draws the glue from the glue box 5 into the accommodating chamber 6 through the glue leakage hole 72. During the continuous rotation process, the connecting rod 74 passes through the ascending section 85, and drives the glue pushing plate 71 to slide in the direction away from the guide rail 83, and the glue in the accommodating chamber 6 flows to the plastic layer 2 through the leakage hole 72. The accommodating chamber 6 slides from one end of the through port 14 to the other end. When the glue dripping is completed, the scraper plate 9 just contacts with the glue, and the glue leveling plate 101 slides to the front side of the scraper plate 9 to wrap the glue. At the same time, the reciprocating screw rod 114 The nut 115 drives the rectangular rod 113 and the piston 112 to slide back and forth in the cylinder 111, and the gas in the cylinder 111 is injected into the blowing head 117 through the blowing pipe 116, and the side wall of the scraper plate 9 is blown intermittently. At this time, the glue at the joint with the scraper plate 9 is under pressure, and the glue flows to the rear of the air flow, so that the glue and the scraper plate 9 are intermittently fitted. Under the action of intermittent blowing, the glue is in a wavy surging state, so that the glue is spread faster, and the glue plate 101 gradually slides to the rear side of the scraper plate 9, and the action of restricting the diffusion of the glue is gradually cancelled, so that the remaining glue is completely laid on the plastic layer 2, and the glue will not be thin in the middle and piled up on both sides, so that the glue laying surface is smoother.

[0032] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front and back", "left and right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the invention.

[0033] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0034] The above description in conjunction with the accompanying drawings is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiment. It should be pointed out that for those skilled in the art, various modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the scope of protection of the present invention and will not affect the effect and practicality of the implementation of the present invention.

Claims

1. A low-deviation paper-plastic composite bag bonding device, comprising a workbench (1) and a conveyor belt (3) arranged on the workbench (1) for conveying a plastic layer (2), characterized in that: A glue cylinder (4) is rotatably arranged on the workbench (1), a glue box (5) is fixedly arranged above the glue cylinder (4), a plurality of accommodating chambers (6) for carrying glue liquid are provided on the glue cylinder (4), a glue pushing assembly (7) is arranged in the accommodating chamber (6), the glue pushing assembly (7) comprises a glue pushing plate (71) and a plurality of glue leakage holes (72) arranged on the accommodating chamber (6), a guide assembly (8) is arranged on the rotation path of the glue pushing plate (71), a glue scraping plate (9) is arranged on one side of the glue cylinder (4), a glue spreading assembly (10) and a glue blowing assembly (11) are arranged on the glue scraping plate (9), and the glue spreading assembly (10) and the glue blowing assembly (11) are arranged on the glue spreading assembly (71). The component (10) comprises glue spreading plates (101) slidably arranged on both sides of the glue scraper (9); the glue pushing component (7) in cooperation with the guide component (8) enables the glue pushing plate (71) to push the glue to flow from the glue leakage hole (72) to the plastic layer (2) and at the same time, the glue is drawn into the accommodating chamber (6) through the glue pushing plate (71) at the glue box (5); the glue spreading component (10) is used to control the diffusion range of the glue during the reciprocating sliding of the glue spreading plate (101) when the glue scraper (9) is scraping glue; the glue blowing component (11) is used to blow air onto the side wall of the glue scraper (9) when the glue scraper (9) is scraping glue, so that the glue flows in a wave-like surging state.

2. A low-deviation paper-plastic composite bag bonding device according to claim 1, characterized in that: The rubber pushing assembly (7) further comprises a through groove (73) formed on the accommodating cavity (6), and a connecting rod (74) slidably arranged in the through groove (73); the rubber pushing plate (71) cooperates with the accommodating cavity (6); the bottom of the connecting rod (74) is configured to be spherical and the connecting rod (74) is fixedly connected to the rubber pushing plate (71).

3. A low-deviation paper-plastic composite bag bonding device according to claim 2, characterized in that: The two sides of the glue cylinder (4) are fixedly provided with a rotating shaft (12); the guide assembly (8) comprises fixed plates (81) fixedly provided on the two sides of the workbench (1), a fixed shaft (82) fixedly provided between the fixed plates (81), and a guide rail (83) fixedly provided on the fixed shaft (82); the guide rail (83) is composed of a descending section (84) and an ascending section (85); the connecting rod (74) cooperates with the guide rail (83); the rotating shaft (12) is rotatably provided between the fixed plates (81) and rotatably cooperates with the fixed shaft (82).

4. A low-deviation paper-plastic composite bag bonding device according to claim 3, characterized in that: The glue spreading assembly (10) further comprises a first bevel tooth (102) fixedly arranged on the rotating shaft (12), a rotating rod (103) rotatably arranged on the workbench (1), second bevel teeth (104) fixedly arranged on both sides of the rotating rod (103), a guide cylinder (105) rotatably arranged on the workbench (1), a guide groove (106) provided on the guide cylinder (105), a guide rod (107) fixedly arranged on the glue spreading plate (101), and a third bevel tooth (108) fixedly arranged on the guide cylinder (105); the bottom of the guide rod (107) is configured to be spherical and to cooperate with the guide groove (106); the first bevel tooth (102) and the third bevel tooth (108) are both meshed with the second bevel tooth (104); and the glue spreading plates (101) are connected via an extension rod (109).

5. The low-deviation paper-plastic composite bag bonding device according to claim 1, characterized in that: The rubber blowing assembly (11) comprises a cylinder (111) fixedly arranged on a workbench (1), a piston (112) slidably arranged in the cylinder (111), a rectangular rod (113) fixedly arranged on the piston (112), a reciprocating screw (114) rotatably arranged on the workbench (1), a nut (115) slidably arranged on the reciprocating screw (114), an air blowing pipe (116) fixedly arranged on the cylinder (111), and an air blowing head (117) obliquely arranged on the air blowing pipe (116); the nut (115) is fixedly connected to the rectangular rod (113).

6. The low-deviation paper-plastic composite bag bonding device according to claim 1, characterized in that: A baffle (13) is fixedly arranged on the glue box (5) and a through opening (14) is opened on the baffle (13). The inner wall of the baffle (13) is in contact with the outer wall of the glue cylinder (4). The scraper plate (9) is fixedly arranged on the baffle (13). The baffle (13) is provided with a chamfer (15).

7. A low-deviation paper-plastic composite bag bonding device according to claim 4, characterized in that: The guide groove (106) is configured as a wave-shaped groove structure.

8. The low-deviation paper-plastic composite bag bonding device according to claim 1, characterized in that: The rubber scraper (9) is made of rubber material.

9. A method for bonding a low-deviation paper-plastic composite bag, using the low-deviation paper-plastic composite bag bonding device according to claim 1, comprising the following steps: Step 1: When the upper glue cylinder (4) rotates, it drives the connecting rod (103) to slide on the guide rail (83), so that the glue pushing plate (71) allows the glue in the accommodating chamber (6) to flow through the glue leakage hole (72) to the surface of the plastic layer (2) being transmitted on the conveyor belt (3), and at the same time, the glue pushing plate (71) at the glue box (5) draws the glue from the glue box (5) into the accommodating chamber (6); Step 2: When the scraper (9) is scraping the glue, the glue spreading plate (101) is moved back and forth on both sides of the scraper (9) by means of the guide cylinder (105) to control the diffusion range of the glue; Step 3: The piston (112) is driven to reciprocate in the cylinder (111) by the reciprocating screw rod (114), so that the air blowing head (117) blows air onto the side wall of the scraper plate (9), causing the glue to flow in a wave-like surging state.

Images