A low deviation paper-plastic composite bag bonding device and bonding method

Abstract

The application relates to a low-deviation paper-plastic composite bag bonding device and a bonding method. The low-deviation paper-plastic composite bag bonding device comprises a workbench, a conveying belt arranged on the workbench and used for conveying a plastic layer, a gluing cylinder rotatably arranged on the workbench, a glue tank fixedly arranged above the gluing cylinder, a plurality of containing cavities for containing glue liquid are arranged on the gluing cylinder, a glue pushing assembly is arranged in the containing cavities, the glue pushing assembly comprises a glue pushing plate and a plurality of glue leaking holes arranged on the containing cavities, a guide assembly is arranged on a rotating path of the glue pushing plate, a glue scraping plate is arranged on one side of the gluing cylinder, a glue uniformizing assembly and a glue blowing assembly are arranged on the glue scraping plate, the glue uniformizing assembly comprises glue uniformizing plates which are slidably arranged on two sides of the glue scraping plate, the glue uniformizing assembly controls the diffusion range of the glue, ensures that the glue is uniformly laid on the plastic layer, air is blown on the wall of the glue scraping plate, the glue flows in a wave shape, the space formed by the glue scraping plate and the glue uniformizing plate is filled, and the glue laying surface is more flat and uniform.

Description

TECHNICAL FIELD

[0001] The application relates to the paper-plastic bag processing technical field, in particular to a precision structural part of an explosion-proof lamp and a gluing device for gluing the precision structural part. BACKGROUND

[0002] The paper-plastic bag is composed of plastic and kraft paper, and the kraft paper is bonded to the plastic layer after the plastic layer is coated with glue. During the bonding process, the glue is usually applied to the plastic layer by using a brush. During the process of brushing the glue from one end of the plastic layer to the other end, the glue will spread to both sides at the beginning, resulting in the phenomenon that the glue is thin in the middle and accumulates on both sides of the plastic layer. Therefore, the accumulated glue needs to be repeatedly brushed flat. In addition, the front section of the glue laying surface is very flat, and the glue amount is reduced, resulting in the gradual shrinkage of the rear section of the glue laying surface to the middle, forming a triangular shape, and the glue laying is not complete.

[0003] A paper-plastic bonding equipment and method for packaging bag production and processing are disclosed in Chinese Patent No. CN115318553A. The equipment includes two linear modules that drive the bonding cylinder to move horizontally in the same direction. The glue inside the outlet pipe cylinder drops onto the top surface of the plastic layer under the action of gravity. The horizontal movement of the bonding cylinder allows the brushes on both sides of the outlet pipe cylinder to evenly brush the dropped glue. By dropping the glue on the plastic layer in sections, the uneven distribution of glue on the front and rear sections of the plastic layer during the glue brushing process is avoided. The process of repeatedly brushing glue is reduced, and the glue brushing efficiency is improved. Although the bonding equipment avoids the repeated brushing of glue, the glue will spread to both sides during the brushing process, resulting in the phenomenon that the glue is thin in the middle but accumulates on both sides of the plastic layer after brushing. During the bonding process with the kraft paper, the bonding is not flat and glue overflow occurs, which reduces the overall quality of the paper-plastic bag. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a low-deviation paper-plastic composite bag bonding device. The glue is pushed out of the accommodating cavity and flows onto the surface of the plastic layer through the glue pushing plate. At the same time, the glue is sucked into the empty accommodating cavity through the glue pushing plate at the glue tank. Automatic glue pushing and glue replenishing are achieved. When the glue is scraped flat by the glue scraping plate, the glue leveling plate slides back and forth on the glue scraping plate to control the spreading range of the glue, ensuring that the glue is evenly laid on the plastic layer. The glue is blown onto the inner wall of the glue scraping plate by the glue blowing assembly, making the glue flow in a wave shape, filling the space between the glue scraping plate and the glue leveling plate, and making the glue laying surface more uniform.

[0005] The technical solutions of the present application are as follows:

[0006] The application discloses a low-deviation paper-plastic composite bag bonding device, which comprises a workbench and a conveying belt arranged on the workbench and used for conveying a plastic layer, an adhesive cylinder is rotatably arranged on the workbench, an adhesive tank is fixedly arranged above the adhesive cylinder, a plurality of accommodating cavities for containing glue are formed in the adhesive cylinder, a glue pushing assembly is arranged in the accommodating cavities, the glue pushing assembly comprises a glue pushing plate and a plurality of glue leaking holes formed in the accommodating cavities, a guide assembly is arranged on a rotating path of the glue pushing plate, a glue scraping plate is arranged on one side of the adhesive cylinder, a glue uniformizing assembly and a glue blowing assembly are arranged on the glue scraping plate, the glue uniformizing assembly comprises glue uniformizing plates which are slidably arranged on both sides of the glue scraping plate, the glue pushing assembly pushes the glue from the glue leaking holes to the plastic layer under the cooperation of the guide assembly, and the glue pushing plate is used for sucking the glue into the accommodating cavities when passing the adhesive tank, the glue uniformizing assembly is used for controlling the diffusion range of the glue during reciprocating sliding of the glue uniformizing plates when the glue scraping plate scrapes the glue, and the glue blowing assembly is used for blowing air to the side wall of the glue scraping plate when the glue scraping plate scrapes the glue, so that the glue flows in a wave-shaped state.

[0007] As a kind of preferred, the glue pushing assembly further comprises through groove formed in accommodating cavity, connecting rod is slidably arranged in through groove, the glue pushing plate is matched with accommodating cavity, the bottom of connecting rod is provided with spherical shape and connecting rod is fixedly connected with glue pushing plate.

[0008] As a kind of preferred, the adhesive cylinder is fixedly provided with rotating shaft on both sides, the guide assembly comprises fixed plate fixedly arranged on both sides of workbench, fixed shaft fixedly arranged between fixed plate, guide rail fixedly arranged on fixed shaft, the guide rail is composed of descending section and ascending section, the connecting rod is matched with guide rail, the rotating shaft is rotatably arranged between fixed plate and on fixed shaft.

[0009] As a kind of preferred, the glue uniformizing assembly further comprises first bevel gear fixedly arranged on rotating shaft, rotating rod rotatably arranged on workbench, second bevel gear fixedly arranged on both sides of rotating rod, guide cylinder rotatably arranged on workbench, guide groove formed in guide cylinder, guide rod fixedly arranged on glue uniformizing plate, third bevel gear fixedly arranged on guide cylinder, the bottom of guide rod is provided with spherical shape and matched with guide cylinder, the first bevel gear and third bevel gear are engaged with second bevel gear, and the glue uniformizing plates are connected by extension rod.

[0010] As a kind of preferred, the glue blowing assembly comprises cylinder fixedly arranged on workbench, piston slidably arranged in cylinder, rectangular rod fixedly arranged on piston, reciprocating screw rod rotatably arranged on workbench, nut slidably arranged on reciprocating screw rod, blowing pipe fixedly arranged on cylinder, blowing head obliquely arranged on blowing pipe, and the nut is fixedly connected with rectangular rod.

[0011] As a kind of preferred, the glue tank is fixedly provided with baffle and is provided with through opening on baffle, the inner wall of baffle is attached to the outer wall of glue cylinder, the glue scraping plate is fixedly arranged on baffle, and baffle is provided with chamfer.

[0012] As a kind of preferred, the guiding groove is arranged as a wave-shaped groove structure.

[0013] As a kind of preferred, the glue scraping plate is composed of rubber material.

[0014] Another design purpose of the present application is to provide a low-deviation paper-plastic composite bag bonding method, which specifically comprises the following steps:

[0015] Step one, when the glue cylinder rotates, the connecting rod is driven to slide on the guide rail, so that the glue plate draws the glue in the glue tank into the accommodating cavity through the glue plate at the glue tank while the glue plate flows the glue in the accommodating cavity to the surface of the plastic layer on the conveying belt through the glue leakage hole;

[0016] Step two, when the glue scraping plate scrapes the glue, the guiding cylinder makes the glue spreading plate reciprocate on both sides of the glue scraping plate to control the spreading range of the glue;

[0017] Step three, the reciprocating screw rod drives the piston to reciprocate in the cylinder body, so that the air blowing head blows air on the side wall of the glue scraping plate, and the glue flows in a wave-shaped turbulent state.

[0018] The present application has the advantages of

[0019] 1. The present application is provided with a glue pushing assembly and a guiding assembly, which realizes the effect of automatic glue pushing and glue supplementing, and the accommodating cavities are arranged at intervals, so that the glue can be segmented and dropped to ensure that the glue is evenly laid on the surface of the plastic layer.

[0020] 2. The present application is provided with a glue spreading assembly and a glue blowing assembly, so that when the glue scraping plate scrapes the glue, air is blown on the side wall of the glue scraping plate to make the glue flow in a wave-shaped turbulent state, so that the glue fills the space formed by the glue scraping plate and the glue spreading plate, and the glue spreading is more flat in cooperation with the gradually retreating structure of the glue spreading plate, so as to prevent the triangular laying surface and the inconsistent phenomenon of the front and rear laying surfaces of the glue.

[0021] In summary, the present application has the advantages of flat glue laying and high efficiency, and is suitable for the paper-plastic bag processing technical field. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described below in conjunction with the drawings:

[0023] Figure 1 It is a structure diagram of a low-deviation paper-plastic composite bag bonding device;

[0024] Figure 2 Structure diagram of the accommodating cavity;

[0025] Figure 3 Structure diagram of the pushing assembly and the guiding assembly;

[0026] Figure 4 Structure diagram of the uniformizing assembly;

[0027] Figure 5 Structure diagram of the glue blowing assembly;

[0028] Figure 6 Structure diagram of the pushing plate passing through the descending section to draw glue into the accommodating cavity;

[0029] Figure 7 Structure diagram of the pushing plate passing through the ascending section to push glue out;

[0030] Figure 8 Structure diagram of the scraping plate contacting with glue and the uniformizing plate sliding to the front side of the scraping plate;

[0031] Figure 9 Structure diagram of the scraping plate scraping glue and the uniformizing plate gradually retreating;

[0032] Figure 10 Structure diagram of the scraping plate scraping glue to make the front section of glue accumulate;

[0033] Figure 11 Structure diagram of the piston injecting gas into the blowing head to blow gas;

[0034] Figure 12 Structure diagram of the blowing head blowing gas to make the glue flow in a wave-shaped and surging manner;

[0035] Figure 13 Structure diagram of the blowing head cooperating with the uniformizing plate to lay the glue in a flat manner;

[0036] The reference signs: 1 workbench, 2 plastic layer, 3 conveying belt, 4 glue applying cylinder, 5 glue tank, 6 accommodating cavity, 7 pushing assembly, 71 pushing plate, 72 glue leakage hole, 73 through groove, 74 connecting rod, 8 guiding assembly, 81 fixed plate, 82 fixed shaft, 83 guide rail, 84 descending section, 85 ascending section, 9 scraping plate, 10 uniformizing assembly, 101 uniformizing 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 body, 112 piston, 113 rectangular rod, 114 reciprocating screw rod, 115 nut, 116 blowing pipe, 117 blowing head, 12 rotating shaft, 13 baffle, 14 through opening, 15 chamfer. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings.

[0038] Embodiment one

[0039] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0040] As shown in Figures 1 to 13 A low deviation paper-plastic composite bag bonding device includes a workbench 1 and a conveying belt 3 arranged on the workbench 1 for conveying a plastic layer 2. The workbench 1 is rotatably provided with a gluing cylinder 4. A glue tank 5 is fixedly arranged above the gluing cylinder 4. A plurality of accommodating cavities 6 for accommodating glue are formed in the gluing cylinder 4. A glue pushing assembly 7 is arranged in the accommodating cavities 6. The glue pushing assembly 7 includes a glue pushing plate 71 and a plurality of glue leaking holes 72 formed in the accommodating cavities 6. A guide assembly 8 is arranged on a rotating path of the glue pushing plate 71. A glue scraping plate 9 is arranged on one side of the gluing cylinder 3. An even glue assembly 10 and a glue blowing assembly 11 are arranged on the glue scraping plate 9. The even glue assembly 10 includes even glue plates 101 slidingly arranged on both sides of the glue scraping plate 9. The glue pushing assembly 7 pushes the glue from the glue leaking holes 72 to the plastic layer 2 under the cooperation of the guide assembly 8, and at the same time, the glue pushing plate 71 draws the glue into the accommodating cavities 6 at the glue tank 5. The even glue assembly 10 controls the diffusion range of the glue during the reciprocating sliding process of the even glue plates 101 when the glue is scraped by the glue scraping plate 9. The glue blowing assembly 11 blows air to the side wall of the glue scraping plate 9 when the glue is scraped by the glue scraping plate 9, so that the glue flows in a wave shape. The conveying belt 3 always drives the plastic layer 2 to be conveyed, and a negative pressure device is arranged on the conveying belt 3 to adsorb the plastic layer 2, preventing deviation during glue scraping.

[0041] It should be emphasized that, as shown in Figure 2 and Figure 3 The glue pushing assembly 7 further includes a through groove 73 formed in the accommodating cavities 6, and a connecting rod 74 slidingly arranged in the through groove 73. The glue pushing plate 71 cooperates with the accommodating cavities 6. The bottom of the connecting rod 74 is provided in a spherical shape, and the connecting rod 74 is fixedly connected with the glue pushing plate 71.

[0042] In addition, as shown in Figure 6 and Figure 7As shown, the glue cylinder 4 is fixedly provided with rotating shafts 12 on both sides, the guide assembly 8 comprises fixed plates 81 fixedly provided on both sides of the workbench 1, fixed shafts 82 fixedly provided between the fixed plates 81, guide rails 83 fixedly provided on the fixed shafts 82, the guide rails 83 are composed of descending sections 84 and ascending sections 85, the connecting rods 74 are matched with the guide rails 83, the rotating shafts 12 are rotatably provided between the fixed plates 81 and rotatably matched with the fixed shafts 82, one side of each fixed plate 81 is provided with a motor, the rotating shafts 12 are connected with the motor through a belt, in use, the motor drives the rotating shafts 12 and the glue cylinder 4 to rotate, drives the connecting rods 74 to slide on the guide rails 83, when the connecting rods 74 slide to the descending sections 84, drives the connecting rods 74 and the glue pushing plates 71 to slide to the direction close to the guide rails 83, draws the glue from the glue tank 5 into the containing cavities 6 through the glue leaking holes 72, in the process of continuous rotation, the connecting rods 74 pass through the ascending sections 85, drives the glue pushing plates 71 to slide to the direction away from the guide rails 83, flows the glue in the containing cavities 6 to the plastic layer 2 through the glue leaking holes 72, realizes the effect of automatic glue pushing and glue supplementing through this mode, and the containing cavities 6 are arranged at intervals, so the glue can be segmentedly dropped, ensures that the glue is uniformly laid on the surface of the plastic layer 2.

[0043] It is worth mentioning that, as Figures 8 to 10As shown, the glue uniformizing assembly 10 further comprises a first bevel gear 102 fixedly arranged on the rotating shaft 12, a rotating rod 103 rotatably arranged on the workbench 1, a second bevel gear 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 opened on the guide cylinder 105, a guide rod 107 fixedly arranged on the glue uniformizing plate 101, a third bevel gear 108 fixedly arranged on the guide cylinder 105, the bottom of the guide rod 107 is provided in a spherical shape and matched with the guide groove 106, the first bevel gear 102 and the third bevel gear 108 are all engaged with the second bevel gear 104, and the glue uniformizing plates 101 are connected through the extension rod 109, wherein the initial state of the glue uniformizing plate 101 is behind the glue scraping plate 9, and whenever a single accommodating cavity 6 slides out of the baffle 13, the glue uniformizing plate 101 slides to the front side of the glue scraping plate 9 from one end to the other end of the through opening 14 to complete the glue dropping, so as to wrap the glue, the glue uniformizing plate 101 and the glue scraping plate 9 are in sealing cooperation, when the glue uniformizing plate 101 retreats, the residual glue is scraped off by the glue scraping plate 9, when in use, when the glue dropping is completed, the glue scraping plate 9 contacts the glue while the glue uniformizing plate 101 slides to the front side of the glue scraping plate 9, at this time, the glue scraping plate 9 and the glue uniformizing plate 101 wrap the glue, when the glue scraping plate 9 scrapes the glue while the plastic layer 2 drives the glue to continue to slide, at this time, since the glue uniformizing plate 101 limits the diffusion of the glue, the glue accumulates on the inner wall of the glue scraping plate 9, the thickness of the glue close to the inner wall is higher than that far away from the inner wall, with the gradual adhesion of the glue on the plastic layer 2, the amount of the glue gradually decreases after the front section of the glue is laid, in order to prevent the unevenness caused by the gradual contraction of the glue on the rear section of the laying surface to the middle, in the process of the continuous rotation of the guide cylinder 105, the glue uniformizing plate 101 gradually slides to the other end of the glue scraping plate 9, so that the glue uniformizing plate 101 gradually cancels the action of limiting the diffusion of the glue, so that the remaining glue is completely laid on the plastic layer 2 and does not cause the situation that the glue is thin in the middle and accumulates on both sides, so that the glue laying surface is uniform and flat.

[0044] wherein, as Figures 11 to 13As shown, the glue blowing assembly 11 includes a cylinder 111 fixedly arranged on the workbench 1, a piston 112 slidingly 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 slidingly arranged on the reciprocating screw rod 114, a blowing pipe 116 fixedly arranged on the cylinder 111, a blowing head 117 obliquely arranged on the blowing pipe 116, and the nut 115 is fixedly connected with the rectangular rod 113. The reciprocating screw rod is connected with the motor through a belt. In use, when the glue scraping plate 9 scrapes glue, the reciprocating screw rod 114 rotates, the nut 115 drives the rectangular rod 113 and the piston 112 to reciprocally slide in the cylinder 111, the gas in the cylinder 111 is injected into the blowing head 117 through the blowing pipe 116, and the inner wall of the glue scraping plate 9 is intermittently blown. The glue adhered to the inner wall of the glue scraping plate 9 is subjected to pressure, and the glue flows to the rear of the airflow. At this time, the glue accumulation section is behind the airflow, rather than adhering to the glue scraping plate 9, which changes the state that the glue scraping plate 9 and the glue are always adhered to each other, so that the glue and the glue scraping plate 9 are intermittently adhered to each other. Under the action of intermittent blowing, the glue is in a wave-shaped turbulent state, the upper part of the glue accumulation section flows downward to form a turbulent state, and the glue flows to both sides during turbulence to fill the space formed by the glue scraping plate 9 and the glue leveling plate 101, so that the glue is laid more flatly, prevents the glue from gradually shrinking to the middle in the later laying section due to the gradual reduction of the amount of glue, and makes the glue spread faster. In combination with the gradually retreating mode of the glue leveling plate 101, the glue can be laid flatly.

[0045] It should be further pointed out that, as shown in Figure 3 The glue tank 5 is fixedly provided with a baffle 13, and the baffle 13 is provided with a through opening 14. The inner wall of the baffle 13 is adhered to the outer wall of the glue cylinder 4. The glue scraping plate 9 is fixedly arranged on the baffle 13. The baffle 13 is provided with a chamfer 15. In use, the baffle 13 can prevent the glue in the containing cavity 6 from dripping before reaching the through opening 14, and plays a shielding role. In addition, the containing cavity 6 pushes out all the glue from one end to the other end of the through opening 14, and the glue leveling plate 101 simultaneously slides to the front side of the glue scraping plate 9 to wrap the glue. When the glue scraping of the glue section is completed, the glue leveling plate 101 is located at the rear side of the glue scraping plate 9. When the next containing cavity 6 starts to drip glue, the glue leveling plate 71 repeats the above action to slide to the front side of the glue scraping plate 9 to prepare for glue scraping. In addition, when the containing cavity 6 completes the glue dripping and passes through the chamfer 15, the chamfer 15 scrapes off the residual glue on the containing cavity 6.

[0046] It should be further pointed out that, as shown in Figure 4 The guide groove 106 is arranged in a wave-shaped groove structure, so as to drive the glue leveling plate 101 to reciprocally move.

[0047] It should be further pointed out that, as shown in Figure 1As shown, the glue scraping plate 9 is made of rubber material, and the glue scraping plate 9 made of rubber material prevents damage to the plastic layer 2.

[0048] Embodiment two

[0049] A low deviation paper-plastic composite bag bonding method comprises the following steps:

[0050] Step one, when the glue applying cylinder 4 rotates, the connecting rod 74 is driven to slide on the guide rail 83, so that the glue scraping plate 71 flows the glue in the accommodating cavity 6 to the surface of the plastic layer 2 on the conveying belt 3 through the glue leakage hole 72, and at the same time, the glue scraping plate 71 draws the glue from the glue tank 5 into the accommodating cavity 6;

[0051] Step two, when the glue scraping plate 9 scrapes the glue, the glue spreading plate 101 is driven to reciprocate on both sides of the glue scraping plate 9 through the guide cylinder 105, so as to control the spreading range of the glue;

[0052] Step three, the piston 112 is driven to reciprocate in the cylinder body 111 through the reciprocating screw rod 114, so that the air blowing head 117 blows air on the side wall of the glue scraping plate 9, and the glue flows in a wave shape.

[0053] Working process

[0054] The motor drives the rotating shaft 12 and the glue applying 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, the connecting rod 74 and the glue scraping plate 71 are driven to slide towards the guide rail 83, so that the glue is drawn from the glue tank 5 into the accommodating cavity 6 through the glue leakage hole 72. During the continuous rotation, the connecting rod 74 passes through the ascending section 85, drives the glue scraping plate 71 to slide away from the guide rail 83, and flows the glue in the accommodating cavity 6 to the plastic layer 2 through the glue leakage hole 72. At the same time, the glue scraping plate 9 is in contact with the glue, the glue spreading plate 101 slides to the front side of the glue scraping plate 9, and the reciprocating screw rod 114 rotates, so that the nut 115 drives the rectangular rod 113 and the piston 112 to reciprocate in the cylinder body 111, the gas in the cylinder body 111 is injected into the air blowing head 117 through the air blowing pipe 116, and the side wall of the glue scraping plate 9 is intermittently blown by air. At this time, the glue at the contact position of the glue scraping plate 9 is subjected to pressure, the glue flows to the rear of the air flow, and the glue is intermittently attached between the glue scraping plate 9. Under the action of intermittent air blowing, the glue flows in a wave shape, and the glue is more quickly spread. In combination with the gradually sliding mode of the glue spreading plate 101 to the rear side of the glue scraping plate 9, the action of limiting the spreading of the glue is gradually cancelled, so that the remaining glue is completely laid on the plastic layer 2, and the glue in the middle is not thin, and the glue on both sides is not accumulated, so that the glue laying surface is more flat.

[0055] In the description of the present application, it should be understood that the terms "front", "rear", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0056] 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 one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0057] The above description is only a preferred embodiment of the present application, but the present application is not limited to the above-mentioned embodiment, and 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 application, and these should be regarded as the protection scope of the present application, and will not affect the effect and practicability of the present application.

Claims

1. A low deviation paper-plastic composite bag bonding device, comprising a workbench (1) and a conveying belt (3) arranged on the workbench (1) for conveying a plastic layer (2), characterized in that: The workbench (1) is provided with an upper glue cylinder (4) rotatingly arranged thereon, the upper glue cylinder (4) is fixedly provided with a glue tank (5) above, a plurality of containing cavities (6) for containing glue are formed in the upper glue cylinder (4), a glue pushing assembly (7) is arranged in the containing cavities (6), the glue pushing assembly (7) comprises a glue pushing plate (71) and a plurality of glue leaking holes (72) formed in the containing cavities (6), a guide assembly (8) is arranged on a rotating path of the glue pushing plate (71), a glue scraping plate (9) is arranged on one side of the upper glue cylinder (4), a glue uniformizing assembly (10) and a glue blowing assembly (11) are arranged on the glue scraping plate (9), the glue uniformizing assembly (10) comprises glue uniformizing plates (101) slidingly arranged on both sides of the glue scraping plate (9), the glue pushing assembly (7) pushes the glue pushing plate (71) to push the glue from the glue leaking holes (72) to the plastic layer (2) under the cooperation of the guide assembly (8), and the glue pushing plate (71) draws the glue into the containing cavities (6) through the glue tank (5), the glue uniformizing assembly (10) is used for controlling the diffusion range of the glue in the reciprocating sliding process of the glue uniformizing plates (101) when the glue scraping plate (9) scrapes the glue, and the glue blowing assembly (11) is used for blowing air to the side wall of the glue scraping plate (9) when the glue scraping plate (9) scrapes the glue, so that the glue flows in a wave-shaped state; The glue pushing assembly (7) further comprises a through groove (73) formed in the containing cavities (6) and a connecting rod (74) slidingly arranged in the through groove (73), the glue pushing plate (71) is matched with the containing cavities (6), and the bottom of the connecting rod (74) is provided in a spherical shape and the connecting rod (74) is fixedly connected with the glue pushing plate (71); Rotating shafts (12) are fixedly arranged on both sides of the upper glue cylinder (4), the guide assembly (8) comprises fixed plates (81) fixedly arranged on both sides of the workbench (1), fixed shafts (82) fixedly arranged between the fixed plates (81), guide rails (83) fixedly arranged on the fixed shafts (82), the guide rails (83) are composed of descending sections (84) and ascending sections (85), the connecting rod (74) is matched with the guide rails (83), and the rotating shafts (12) are rotatably arranged between the fixed plates (81) and rotatably matched with the fixed shafts (82); The glue uniformizing assembly (10) further comprises first bevel gears (102) fixedly arranged on the rotating shafts (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) formed in the guide cylinder (105), guide rods (107) fixedly arranged on the glue uniformizing plates (101), and third bevel gears (108) fixedly arranged on the guide cylinder (105), the bottom of the guide rods (107) is provided in a spherical shape and matched with the guide groove (106), the first bevel gears (102) and the third bevel gears (108) are all meshed with the second bevel gears (104), and the glue uniformizing plates (101) are connected through extension rods (109).

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

3. A low deviation paper-plastic composite bag bonding device according to claim 2, characterized in that: The glue tank (5) is fixedly provided with a baffle (13) having an opening (14) formed therein, the inner wall of the baffle (13) is attached to the outer wall of the glue applying cylinder (4), the glue scraping plate (9) is fixedly arranged on the baffle (13), and the baffle (13) is provided with a chamfer (15).

4. A low deviation paper-plastic composite bag bonding device according to claim 2, characterized in that: The guide groove (106) is in a wave-shaped groove structure.

5. The low deviation paper-plastic composite bag bonding device according to claim 2, characterized in that: The glue scraping plate (9) is made of rubber material.

6. A bonding method using the low-deviation paper-plastic composite bag bonding device according to any one of claims 2-5, comprising the following steps: Step one, when the glue applying cylinder (4) rotates, the connecting rod (74) is driven to slide on the guide rail (83), so that the glue pushing plate (71) flows the glue in the accommodating cavity (6) through the glue leaking hole (72) to the surface of the plastic layer (2) on the conveying belt (3) for transmission, and the glue pushing plate (71) draws the glue from the glue tank (5) into the accommodating cavity (6) at the same time; Step two, when the glue scraping plate (9) scrapes the glue, the glue distributing plate (101) is driven to reciprocate on both sides of the glue scraping plate (9) through the guide cylinder (105), so as to control the diffusion range of the glue; Step three, the piston (112) is driven to reciprocate in the cylinder (111) through the reciprocating screw rod (114), so that the blowing head (117) blows the glue on the side wall of the glue scraping plate (9), and the glue flows in a wave-shaped turbulent state.

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