A kind of high waterproof paper-plastic composite bag preparation device

Abstract

The application relates to a high-waterproof paper-plastic composite bag preparation device, which comprises a cutter, a rotary chain, pressing plates slidingly arranged on the two sides of the cutter, a smoothing plate slidingly arranged below the pressing plates, a bearing plate slidingly arranged below the cutter, the pressing plates and the bearing plate clamping the composite bag and moving to the two sides in the process of the cutter descending, a plurality of fixing plates arranged on the rotary chain, a plurality of adsorption holes arranged on the fixing plates, turning plates rotatably arranged on the two sides of the adsorption holes, the fixing plates moving along with the rotary chain, the adsorption holes adsorbing the seam edges on the storage roller and moving to the side surface of the composite bag, and then the turning plates reversely turning to bend the seam edges to the wall surface of the composite bag from the two sides, so that the problem that the composite bag is prone to being wrinkled in the conveying process is solved, the composite bag is prone to being cut unevenly when the composite bag is cut at the wrinkled position in the cutting process, and the problem that the composite bag cannot be better wrapped by sewing the seam edges from the upper and lower sides is solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of composite bag production, in particular to a high-waterproof paper-plastic composite bag preparation device. BACKGROUND

[0002] The paper-plastic composite bag is a kind of packaging material composed of a plastic layer and kraft paper. The manufacturing process of the paper-plastic composite bag usually includes high-temperature and high-pressure compounding of plastic woven cloth and kraft paper to form a three-in-one composite structure. This structure not only has excellent physical properties, such as tear resistance and strong adhesion, but also has good chemical stability, can prevent moisture, resist acid and alkali, and prevent corrosion.

[0003] A Chinese invention patent with the application publication number CN111152511A discloses a paper-plastic composite bag cutting mechanical and manufacturing cutting method, which comprises a conveying device, a cutting device and a hemming device. The cutting device is installed on the right end face of the conveying device, and the hemming device is installed on the right side of the cutting device. The present application can solve the problems of the existing equipment, such as the fixed-length processing method during the cutting process of the paper-plastic composite bag, the low flexibility of the equipment, the inability to simultaneously perform the hemming processing of the bottom edge of the paper-plastic composite bag during the cutting process, the prolongation of the subsequent processing steps, the reduction of the processing rate and continuity, and the increase of the processing cost.

[0004] However, the inventors found that the device has the following problems: the composite bag is prone to wrinkling during the conveying process, so that the cut is not flat when the composite bag is cut at the wrinkled part during the cutting process, and the hemming strip cannot better wrap the composite bag by being hemmed from the upper and lower sides of the composite bag. SUMMARY

[0005] The high waterproof paper-plastic composite bag preparation device aims at the deficiencies of the prior art, and comprises a cutting assembly and a seam edge conveying assembly, the cutting assembly comprises a pneumatic cylinder and a cutter driven by the pneumatic cylinder, pressing plates are slidably arranged on the two sides of the cutter, a smoothing plate is slidably arranged below the pressing plates, a bearing plate is slidably arranged below the cutter, the pressing plates and the bearing plate clamp the composite bag and move to the two sides in the process of the cutter descending, so that the composite bag is smoothed, the seam edge conveying assembly comprises a rotary chain and a plurality of fixed plates arranged on the rotary chain, a plurality of adsorption holes are arranged on the fixed plates, turning plates are rotatably arranged on the two sides of the adsorption holes, in the process of the fixed plates moving with the rotary chain, the adsorption holes adsorb the seam edges on the storage roller and move to the side of the composite bag, then the turning plates are reversed to bend the seam edges to the wall of the composite bag from the two sides, and finally the seam edges are sewn by the sewing machine, so that the problem of wrinkles of the composite bag in the conveying process is solved, the cutting process is easy to cause uneven cuts at the wrinkle of the composite bag, and the problem that the composite bag cannot be better wrapped by sewing the seam edges from the upper and lower sides is solved.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a high waterproof paper-plastic composite bag preparation device comprises a support frame, a cutting assembly, a seam edge conveying assembly, a gas blowing channel and a sewing machine, the cutting assembly comprises a pneumatic cylinder and a cutter driven by the pneumatic cylinder, pressing plates are slidably arranged on the two sides of the cutter, a smoothing plate is slidably arranged below the pressing plates, a bearing plate is slidably arranged below the smoothing plate and on the support frame, the smoothing plate and the bearing plate clamp the composite bag and move to the two sides in the process of the cutter descending under the driving of the pneumatic cylinder, so that the cutting part of the composite bag is smoothed, the seam edge conveying assembly comprises a storage roller and a rotary chain arranged on one side of the storage roller, a plurality of fixed plates are arranged on the rotary chain, a plurality of adsorption holes are formed in the surface of the fixed plates, turning plates are rotatably arranged on the upper and lower sides of the adsorption holes, a guide rail is arranged above the rotary chain, the fixed plates drive the adsorption holes to inhale air under the action of the guide rail in the process of the rotary chain rotating, so that the seam edges on the storage roller are adsorbed, and the turning plates are used to fold the seam edges from the upper and lower sides to the middle under the action of the guide rail in the process of the fixed plates moving, so that the seam edges are attached to the composite bag from the upper and lower sides, then the seam edges are kept attached under the action of the gas blowing channel, and the seam edges and the composite bag are sewn under the action of the sewing machine.

[0007] As a preferred, the cutter is provided with a fixed rod on each side, a limiting rod is arranged at the lower end of the fixed rod, a sleeve is arranged above the pressing plate, the pressing plate is slidably arranged on the fixed rod through the sleeve, a sliding block is arranged below the pressing plate, a sliding groove is arranged on the end surface of the smoothing plate, a sliding rod is arranged in the sliding groove, the sliding rod is slidably arranged with the sliding block, and a spring is arranged between the sliding block and the sliding groove and sleeved on the sliding rod.

[0008] As a kind of preferred, the support frame is provided with bearing rod on both sides of cutter, the bearing plate is slidably arranged on bearing rod, and the abutting place of both sides of bearing plate is provided with inclined plane, the cutter is provided with pressure rod on both sides, the lower end surface of pressure rod is V-shaped, and spring is arranged between bearing plate and support frame and is sleeved on bearing rod.

[0009] As a kind of preferred, the fixed plate is provided with adsorption channel communicated with adsorption hole, the fixed plate end surface is provided with the same piston cylinder as adsorption channel, the piston is slidably arranged in piston cylinder, the piston side is provided with piston rod, the guide rail surface is provided with slide a, and the piston rod is clamped in slide a.

[0010] As a kind of preferred, the fixed plate is provided with opening on both sides of adsorption hole, the opening is provided with rotating shaft, the folding plate is rotatably arranged on rotating shaft, the fixed plate is provided with support plate, the support plate is slidably provided with push rod on both sides, the guide rail surface is provided with slide b, and the push rod is slidably arranged on the surface of slide b.

[0011] As a kind of preferred, the pressing plate side is provided with several air blowing holes, the sleeve is provided with air blowing channel communicated with air blowing hole, and air blowing hole is downwardly inclined.

[0012] As a kind of preferred, the air blowing channel is arranged on both sides of composite bag, the air blowing channel is U-shaped, and both sides of air blowing channel are abutted with both sides of composite bag, and air pump is arranged below rotary chain to drive air blowing of air blowing channel.

[0013] As a kind of preferred, the push rod is provided with limiting ring, and spring is arranged between limiting ring and support plate and is sleeved on push rod.

[0014] As a kind of preferred, torsional spring is arranged between folding plate and rotating shaft.

[0015] As a kind of preferred, the both ends of push rod are provided with hemispherical shape.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. By arranging fixed rod on both sides of cutter, limiting rod is arranged on the lower end of fixed rod, sleeve is arranged above pressing plate, pressing plate is slidably arranged on fixed rod through sleeve, spring is arranged in sleeve, air blowing hole is inclinedly arranged on the side of pressing plate, composite bag cutting place is air blown and cleaned through air blowing hole in the process of cutter descending, surface impurities are avoided to affect cutting quality, and flattening plate below pressing plate is pressed on both sides of cutter in the process of cutter cutting, to prevent composite bag from deviating in the process of cutting.

[0018] 2. The cutting process of the cutter is accompanied by the descent of the pressing plate and the pressing plate, and the lower end of the pressing plate is provided with a smoothing plate. The smoothing plate overlaps the bearing plate while clamping the composite bag, and under the action of the pressing plate, the bearing plate and the smoothing plate move to both sides, thereby smoothing the composite bag and preventing wrinkles during cutting to affect the cutting quality.

[0019] 3. The fixed plate moves with the rotating chain and moves the piston rod under the action of the guide rail, thereby moving the piston to generate negative pressure in the adsorption hole, thereby adsorbing and clamping the seam edge through the storage roller, and moving the seam edge to the side of the composite bag, and moving the push rod under the action of the guide rail, thereby rotating the folding plate on the fixed plate to bend the seam edge from both sides to the surface of the composite bag, which can better wrap the seam edge around the composite bag.

[0020] In summary, the device has the advantages of good cutting effect, avoidance of composite bag wrinkles, and good seam edge wrapping effect, and is especially suitable for the composite bag production technical field. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a structure diagram of a high waterproof paper-plastic composite bag preparation device;

[0023] Figure 2 It is a structure diagram of a cutting assembly in a high waterproof paper-plastic composite bag preparation device;

[0024] Figure 3 It is a top view of a guide rail in a high waterproof paper-plastic composite bag preparation device;

[0025] Figure 4 It is a partial sectional view of a cutting assembly in a high waterproof paper-plastic composite bag preparation device;

[0026] Figure 5 It is a partial structure diagram of a seam edge conveying assembly in a high waterproof paper-plastic composite bag preparation device;

[0027] Figure 6 It is a partial structure diagram of a seam edge conveying assembly in a high waterproof paper-plastic composite bag preparation device;

[0028] Figure 7 It is a partial sectional view of a seam edge conveying assembly in a high waterproof paper-plastic composite bag preparation device;

[0029] Figure 8 is Figure 2 a partial enlarged view at A in the middle;

[0030] Figure 9 is Figure 4 a partial enlarged view at B in the middle;

[0031] Figure 10 is a working state diagram of the adsorption hole in a high waterproof paper-plastic composite bag preparation device;

[0032] Figure 11 is a working state diagram of the folding plate in a high waterproof paper-plastic composite bag preparation device.

[0033] Figure 1. support frame; 2. cutting assembly; 3. seam edge conveying assembly; 4. air blowing channel; 5. sewing machine; 6. air cylinder; 7. cutter; 8. pressing plate; 9. smoothing plate; 10. bearing plate; 11. storage roller; 12. rotary chain; 13. fixed plate; 14. adsorption hole; 15. folding plate; 16. guide rail; 21. fixed rod; 22. limiting rod; 23. sleeve; 24. sliding block; 25. sliding groove; 26. sliding rod; 31. bearing rod; 32. inclined surface; 33. pressing rod; 41. adsorption channel 42. piston cylinder; 43. piston; 44. piston rod; 45. slide a; 51. opening; 52. shaft; 53. support plate; 54. push rod; 55. slide b; 61. air blowing hole; 62. air blowing channel; 71. air pump; 81. limiting ring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings.

[0035] Example 1

[0036] As Figures 1 to 11As shown in the figure, a kind of high waterproof paper plastic composite bag preparation device, including support frame 1, cutting component 2, seam edge conveying component 3, air blowing channel 4, sewing machine 5, the cutting component 2 includes cylinder 6 and the cutter 7 under the driving of cylinder 6, the cutter 7 both sides are slidably provided with pressing plate 8, the pressing plate 8 below is slidably provided with smoothing plate 9, the smoothing plate 9 below is provided with the load-bearing plate 10 slidably arranged on support frame 1, the cutter 7 is in the process of being driven by cylinder 6 to drop, so that smoothing plate 9 and load-bearing plate 10 clamp composite bag and move to both sides to tear the composite bag cutting place, the seam edge conveying component 3 includes storage roller 11 and is provided on one side of storage roller 11 Rotary chain 12, a plurality of fixed plates 13 are provided on rotary chain 12, a plurality of adsorption holes 14 are formed in the surface of fixed plate 13, folding plate 15 is rotatably arranged on both sides of adsorption hole 14 of fixed plate 13, guide rail 16 is provided above rotary chain 12, in the process of rotating with rotary chain 12, adsorption hole 14 is driven to inhale under the action of guide rail 16 to adsorb the seam edge on storage roller 11, folding plate 15 is used to fold from both sides to the middle under the action of guide rail 16 in the process of moving with fixed plate 13 to paste the seam edge from both sides to the composite bag, then under the action of air blowing channel 4, the seam edge is kept pasted and is sewn with the composite bag under the action of sewing machine 5.

[0037] As Figure 9 shown, the cutter 7 both sides are provided with fixed rod 21, the lower end of fixed rod 21 is provided with limit rod 22, the upper side of pressing plate 8 is provided with sleeve 23, the pressing plate 8 is slidably arranged on fixed rod 21 through sleeve 23, the lower side of pressing plate 8 is provided with sliding block 24, the end surface of smoothing plate 9 is provided with sliding groove 25, sliding rod 26 is arranged in sliding groove 25, sliding block 24 is slidably arranged on sliding rod 26, spring is arranged between sliding block 24 and sliding groove 25 and is sleeved on sliding rod 26.

[0038] It is worth mentioning here that the cutter 7 is driven to drop in the process, and the pressing plate 8 on both sides is driven to drop, and the smoothing plate 9 below the pressing plate 8 is pressed against the composite bag, and the cutter 7 continues to drop, so that the spring in the sleeve 23 is compressed, the pressing plate 8 presses the composite bag on both sides of the cutter 7, and the composite bag is prevented from deviating in the cutting process.

[0039] As Figure 4 , Figure 8 shown, the support frame 1 is provided with load-bearing rod 31 on both sides of cutter 7, the load-bearing plate 10 is slidably arranged on load-bearing rod 31, the abutting portion of both sides of load-bearing plate 10 is provided with inclined surface 32, the cutter 7 is provided with pressure rod 33 on both sides, the lower end surface of pressure rod 33 is V-shaped, spring is arranged between load-bearing plate 10 and support frame 1 and is sleeved on load-bearing rod 31.

[0040] In addition, the cutter 7 drives the pressing rod 33 to descend, and when the flattening plate 9 presses the composite bag, it is in contact with the bearing plate 10 to clamp the composite bag, and at the same time, the pressing rod 33 drives the bearing plate 10 and the flattening plate 9 to move to both sides through the V-shaped contact slope 32, so that the flattening plate 9 and the bearing plate 10 stretch and flatten the composite bag, preventing the composite bag from wrinkling during cutting.

[0041] As shown in Figure 1 , Figure 7 , the fixed plate 13 is provided with an adsorption channel 41 communicated with the adsorption hole 14, and the end face of the fixed plate 13 is provided with a piston cylinder 42 same as the adsorption channel 41, and the piston cylinder 42 is slidably provided with a piston 43, and the side of the piston 43 is provided with a piston rod 44, and the surface of the guide rail 16 is provided with a slide a 45, and the piston rod 44 is clamped in the slide a 45.

[0042] It should be noted that when the fixed plate 13 moves to the vicinity of the storage roller 11 with the rotary chain 12, the piston cylinder 42 moves away from the fixed plate 13 side under the action of the slide a 45, thereby driving the piston 43 to move through the adsorption channel 41 to generate suction force in the adsorption hole 14 to adsorb the seam edge on the storage roller 11, and move the seam edge to both sides of the composite bag under the driving of the rotary chain 12.

[0043] As shown in Figure 3 , Figure 7 , the fixed plate 13 is provided with an opening 51 on both sides of the adsorption hole 14, and the opening 51 is provided with a rotating shaft 52, and the folding plate 15 is rotatably arranged on the rotating shaft 52, and the fixed plate 13 is provided with a support plate 53, and the support plate 53 is slidably provided with a push rod 54 on both sides, and the surface of the guide rail 16 is provided with a slide b 55, and the push rod 54 is slidably arranged on the surface of the slide b 55.

[0044] It should be noted that the folding plate 15 is rotatably arranged on both sides of the fixed plate 13, and when the fixed plate 13 drives the seam edge to move to both sides of the composite bag, the push rod 54 moves to the folding plate 15 side under the action of the slide b 55, thereby driving the folding plates 15 on both sides to rotate to the middle, thereby driving the seam edge to bend to the side of the composite bag, so that the seam edge wraps the composite bag in a U shape.

[0045] As shown in Figure 9 , the pressing plate 8 is provided with a plurality of air blowing holes 61, the sleeve 23 is provided with a blowing channel 62 communicated with the air blowing hole 61, and the air blowing hole 61 is inclined downward.

[0046] In addition, after the pressing plate 8 abuts against the composite bag during the descending of the cutter 7, the cutter continues to descend, thereby driving the fixed rod 21 to continue to descend, and the air blowing hole 61 is blown through the air blowing channel 62, so as to blow and clean the surface of the composite bag.

[0047] As shown in the drawings, the air blowing channel 4 is arranged on both sides of the composite bag, the air blowing channel 4 is in a U shape, and the upper and lower sides of the air blowing channel 4 are attached to the upper and lower sides of the composite bag. Figure 1 The rotary chain 12 is arranged below the air blowing channel 4, and an air pump 71 is arranged below the rotary chain 12 for driving the air blowing of the air blowing channel 4.

[0048] It is pointed out here that the air blowing channel 4 is arranged after the folding plate 15 drives the folding of the seam strip edge, and the folded seam strip edge is blow-molded through the continuous blowing of the air blowing channel 4, so as to prevent the seam strip edge from being lifted during the subsequent seamming process, thereby affecting the seamming quality.

[0049] As shown in the drawings, the push rod 54 is arranged with a limiting ring 81, and a spring is arranged between the limiting ring 81 and the supporting plate 53 and sleeved on the push rod 54. Figure 7 It is pointed out here that through the arrangement of the spring sleeved on the push rod 54 between the limiting ring 81 and the supporting plate 53, the push rod 54 drives the folding of the folding plate 15, and the folding plate 15 is reset under the action of the spring, thereby preparing for the next round of work procedure.

[0050] The folding plate 15 and the rotating shaft 52 are arranged with a torsional spring.

[0051] It is pointed out here that through the arrangement of the torsional spring between the folding plate 15 and the rotating shaft 52, the folding plate 15 is reset through the torsional spring when the folding plate 15 is rotated downward at the same time as the reset of the push rod 54.

[0052] As shown in the drawings, the push rod 54 is arranged with a limiting ring 81, and a spring is arranged between the limiting ring 81 and the supporting plate 53 and sleeved on the push rod 54.

[0053] In the description of the present application, it should be understood that the terms "front and back", "left and right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0054] 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.

[0055] In the description of the present application, it should be understood that the terms "front and back", "left and right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0056] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, and any changes or substitutions that can be easily thought of by those skilled in the art under the technical hints of the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A kind of high waterproof paper plastic composite bag preparation device, including support frame (1), cutting component (2), seam edge conveying component (3), air blowing channel (4), sewing machine (5), it is characterized in that, The cutting assembly (2) comprises a cylinder (6) and a cutter (7) driven by the cylinder (6), press plates (8) are slidably arranged on both sides of the cutter (7), a smoothing plate (9) is slidably arranged below the press plates (8), a bearing plate (10) is arranged below the smoothing plate (9) and slidably arranged on the support frame (1), the smoothing plate (9) and the bearing plate (10) are clamped to the composite bag and moved to both sides during the descending process of the cutter (7) driven by the cylinder (6), so as to flatten the cutting position of the composite bag, the seam edge conveying assembly (3) comprises a storage roller (11) and a rotary chain (12) arranged on one side of the storage roller (11), a plurality of fixed plates (13) are arranged on the rotary chain (12), a plurality of adsorption holes (14) are formed in the surface of the fixed plate (13), a folding plate (15) is rotatably arranged on both sides of the adsorption hole (14), a guide rail (16) is arranged above the rotary chain (12), the fixed plate (13) drives the adsorption hole (14) to inhale under the action of the guide rail (16) during the rotating process of the rotary chain (12), so as to adsorb the seam edge on the storage roller (11), the folding plate (15) is used for folding from both sides to the middle under the action of the guide rail (16) during the movement of the fixed plate (13), so as to adhere the seam edge to the composite bag from both sides, then the seam edge is kept adhered under the action of the air blowing channel (4) and is sewn with the composite bag under the action of the sewing machine (5).

2. A device for preparing a high waterproof paper-plastic composite bag according to claim 1, characterized in that, The cutter (7) is provided with a fixed rod (21) on both sides, a limiting rod (22) is arranged at the lower end of the fixed rod (21), a sleeve (23) is arranged above the press plate (8), the press plate (8) is slidably arranged on the fixed rod (21) through the sleeve (23), a sliding block (24) is arranged below the press plate (8), a sliding groove (25) is arranged on the end face of the smoothing plate (9), a sliding rod (26) is arranged in the sliding groove (25), the sliding rod (26) is slidably arranged on the sliding block (24), and a spring is arranged between the sliding block (24) and the sliding groove (25) and sleeved on the sliding rod (26).

3. The apparatus for preparing a high waterproof paper-plastic composite bag according to claim 1, characterized in that, The support frame (1) is provided with a bearing rod (31) on both sides of the cutter (7), the bearing plate (10) is slidably arranged on the bearing rod (31), an inclined surface (32) is arranged at the adhering position of the bearing plate (10) on both sides, a pressing rod (33) is arranged on both sides of the cutter (7), the lower end face of the pressing rod (33) is V-shaped, and a spring is arranged between the bearing plate (10) and the support frame (1) and sleeved on the bearing rod (31).

4. The apparatus for preparing a high waterproof paper-plastic composite bag according to claim 1, characterized in that, The fixed plate (13) is provided with an adsorption channel (41) communicated with the adsorption hole (14), the end surface of the fixed plate (13) is provided with a piston cylinder (42) same with the adsorption channel (41), the piston cylinder (42) is slidably provided with a piston (43), the side surface of the piston (43) is provided with a piston rod (44), the surface of the guide rail (16) is provided with a slide a (45), and the piston rod (44) is clamped in the slide a (45).

5. The apparatus for preparing a high waterproof paper-plastic composite bag according to claim 1, characterized in that, The fixed plate (13) is provided with an opening (51) on the upper and lower sides of the adsorption hole (14), the opening (51) is provided with a rotating shaft (52), the folding plate (15) is rotatably arranged on the rotating shaft (52), the fixed plate (13) is provided with a support plate (53), the support plate (53) is slidably provided with a push rod (54) on the upper and lower sides, the surface of the guide rail (16) is provided with a slide b (55), and the push rod (54) is slidably arranged on the surface of the slide b (55).

6. The apparatus for preparing a high waterproof paper-plastic composite bag according to claim 2, characterized in that, The side surface of the pressing plate (8) is provided with a plurality of air blowing holes (61), the sleeve (23) is provided with a blowing channel (62) communicated with the air blowing hole (61), and the air blowing hole (61) is downwardly inclined.

7. The apparatus for preparing a high waterproof paper-plastic composite bag according to claim 1, characterized in that, The air blowing channel (4) is arranged on both sides of the composite bag, the air blowing channel (4) is in U shape, and the upper and lower sides of the air blowing channel (4) are attached to the upper and lower sides of the composite bag, and the rotary chain (12) is provided below the air blowing channel (4).

8. The apparatus for preparing a high waterproof paper-plastic composite bag according to claim 5, characterized in that, The push rod (54) is provided with a limiting ring (81), and a spring is arranged on the push rod (54) between the limiting ring (81) and the support plate (53).

9. The apparatus for preparing a high waterproof paper-plastic composite bag according to claim 5, characterized in that, The folding plate (15) and the rotating shaft (52) are provided with a torsion spring.

10. The apparatus for preparing a high waterproof paper-plastic composite bag according to claim 5, characterized in that, The push rod (54) is provided with a hemispherical shape at both ends.

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