Paper production line

By designing a continuously conveyed upper production line on the paper production line, the problem of paper handling between different equipment is solved, production efficiency is improved and the risk of damage is reduced, and time-saving paper production is achieved.

CN223147889UActive Publication Date: 2025-07-25GUANGDONG BUSTER TECH CO LTD
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Patent Information

Application Number
CN202421670656.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-16
Publication Date
2025-07-25
Estimated Expiration
2034-07-16

AI Technical Summary

Technical Problem

During the existing paper production process, each process is completed on different equipment, resulting in troublesome, time-consuming and labor-intensive paper handling, easy to break, and low production efficiency.

Method used

A paper production line is designed, including an upper and lower production line. The upper production line includes a traction mechanism, a roller conveying mechanism, a glue coating mechanism, a drying device, an indentation mechanism, an edge pressing mechanism and a folding and edge sealing mechanism. Each process is completed on the same equipment and connected through a platform device to realize the continuous conveying of paper.

Benefits of technology

It improves paper production efficiency, reduces the risk of damage during paper handling, and achieves time-saving and labor-saving production.

✦ Generated by Eureka AI based on patent content.

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Abstract

A paper production line comprises an upper layer production line and a lower layer production line, the upper layer production line comprises a traction mechanism, a guide roller conveying mechanism, a first gluing mechanism, a second gluing mechanism, a drying device, an indentation mechanism, an edge pressing mechanism and an edge folding and sealing mechanism, and the lower layer production line comprises a plurality of unwinding mechanisms which are in butt joint with the traction mechanism. The traction mechanism is in butt joint with the guide roller conveying mechanism, and the guide roller conveying mechanism is used for conveying paper to the first gluing mechanism, the second gluing mechanism, the drying device, the creasing mechanism, the edge pressing mechanism and the edge folding and sealing mechanism. According to the paper production line, the processes of unwinding, gluing, drying, creasing, edge pressing, edge sealing and the like of the paper are completed on the same equipment, the paper does not need to be carried among the processes, time and labor are saved, the production efficiency of the paper is greatly improved, and meanwhile the problem that the paper is damaged due to the fact that the paper is prone to colliding with other objects during carrying is completely eradicated.
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Description

Technical Field

[0001] The utility model relates to the technical field of paper production, and particularly relates to a paper production line. Background Art

[0002] A courier bag refers to a bag used for packaging documents, bills, materials, goods, etc. in the courier industry. Some courier bags are made of kraft paper. The production process of kraft paper includes processes such as unrolling, gluing, drying, indentation, edge pressing, and edge sealing. These processes are all completed on different devices. However, when completed on different devices, the paper needs to be transported between the devices, which is troublesome to operate, time-consuming and laborious, resulting in low production efficiency. Moreover, the paper is prone to collide with other things during transportation, causing damage.

[0003] Therefore, it is necessary to make further improvements. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a paper production line with simple structure, time-saving and labor-saving, high production efficiency, good product quality, and strong practicability, so as to overcome the deficiencies of the prior art.

[0005] A paper production line designed according to this purpose is characterized in that: it includes an upper production line and a lower production line. The upper production line includes a traction mechanism, a guide roller conveying mechanism, a first gluing mechanism, a second gluing mechanism, a drying device, an indentation mechanism, an edge pressing mechanism, and a folding and edge sealing mechanism. The lower production line includes a plurality of unrolling mechanisms. The unrolling mechanism is docked with the traction mechanism, and the traction mechanism is docked with the guide roller conveying mechanism. The guide roller conveying mechanism is used to convey the paper to the first gluing mechanism, the second gluing mechanism, the drying device, the indentation mechanism, the edge pressing mechanism, and the folding and edge sealing mechanism respectively.

[0006] The first gluing mechanism includes a pressure roller, a glue delivery roller, a glue feeding roller, and a glue tray arranged vertically in sequence. The lower part of the glue feeding roller extends into the glue tray. The paper is conveyed between the pressure roller and the glue delivery roller. When the glue feeding roller rotates, it conveys the glue in the glue tray to the glue delivery roller, and when the glue delivery roller rotates, it applies the glue to the paper.

[0007] The second gluing mechanism includes a gluing bracket and a spray gun movably arranged on the gluing bracket. When the spray gun moves, it applies the glue to the paper.

[0008] The indentation mechanism includes a first driver, an upper pressure roller, and a lower pressure roller. The first driver is drivingly connected to the upper pressure roller. The upper pressure roller is provided with a first protrusion, and the lower pressure roller is provided with a second protrusion. The paper is conveyed between the upper pressure roller and the lower pressure roller. The first driver drives the upper pressure roller to move downward, and the first protrusion and the second protrusion cooperate with each other to indent the paper.

[0009] The edge pressing mechanism includes a second driver, a first edge pressing belt assembly, and a second edge pressing belt assembly. The second driver is drivingly connected to the first edge pressing belt assembly. The paper is conveyed between the first edge pressing belt assembly and the second edge pressing belt assembly. The second driver drives the first edge pressing belt assembly to move downward to press the edge of the paper.

[0010] The hemming and sealing mechanism includes a creasing device, a hemming device, and an overlapping device. When the paper is conveyed to the creasing device, the creasing device acts on the edge of the paper to press out a crease. When the paper is conveyed to the hemming device, it acts on the hemming device, causing the hemming device to fold up the edge of the paper along the crease to form a hem. When the paper is conveyed to the overlapping device, the overlapping device acts on the hem to make the hem overlap on the paper.

[0011] A platform device is provided between the upper production line and the lower production line. The traction mechanism, the guide roller conveying mechanism, the first gluing mechanism, the second gluing mechanism, the drying device, the creasing mechanism, the edge pressing mechanism, and the hemming and sealing mechanism are installed on the upper part of the platform device. The unwinding mechanism is located at the bottom of the platform device. A paper passing slot is provided on the platform device. When the traction mechanism and the unwinding mechanism are working, the paper on the unwinding mechanism is conveyed to the traction mechanism through the paper passing slot.

[0012] It further includes a post-processing production line, which includes a post-creasing mechanism, a release paper pasting mechanism, a defect detection mechanism, a cutting mechanism, a material receiving mechanism, a rejection mechanism, a rotary collection mechanism, and a feed roller mechanism connected in sequence. The feed roller mechanism conveys the paper to the post-creasing mechanism, the release paper pasting mechanism, the defect detection mechanism, the cutting mechanism, the material receiving mechanism, the rejection mechanism, and the rotary collection mechanism in sequence.

[0013] It further includes a ramp traction mechanism. The upper production line, the ramp traction mechanism, and the post-processing production line are connected in sequence. The paper on the upper production line is conveyed to the post-processing production line through the ramp traction mechanism.

[0014] The rotary collection mechanism includes a first conveying component and a second conveying component for horizontally conveying the paper, and a rotating disk arranged between the first conveying component and the second conveying component. Slots are annularly distributed on the rotating disk. A collection groove is provided on the second conveying component. When the first conveying component conveys the paper to the rotating disk, the paper is horizontally inserted into the slots. The rotating disk rotates to turn the paper downward so that the paper is vertically arranged and falls into the collection groove.

[0015] In the paper production line of the present utility model, the unwinding mechanism is docked with the traction mechanism, the traction mechanism is docked with the guide roller conveying mechanism, and the guide roller conveying mechanism is used to convey the paper to the first gluing mechanism, the second gluing mechanism, the drying device, the indentation mechanism, the edge pressing mechanism and the edge folding and sealing mechanism respectively, so that the processes of paper unwinding, gluing, drying, indentation, edge pressing and sealing are completed on the same device. There is no need to carry the paper between the processes, which saves time and effort, greatly improves the production efficiency of the paper, and at the same time eliminates the problem that the paper is easily damaged when it hits other things during handling. Brief Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the paper production line in an embodiment of the present utility model.

[0017] Figure 2 It is a schematic diagram of the overall structure of the first gluing mechanism in an embodiment of the present utility model.

[0018] Figure 3 It is a schematic diagram of the overall structure of the second gluing mechanism in an embodiment of the present utility model.

[0019] Figure 4 It is a schematic diagram of the overall structure of the indentation mechanism in an embodiment of the present utility model.

[0020] Figure 5 It is a schematic diagram of the overall structure of the edge pressing mechanism in an embodiment of the present utility model.

[0021] Figure 6 It is a schematic diagram of the overall structure of the edge pressing mechanism from another perspective in an embodiment of the present utility model.

[0022] Figure 7 It is a schematic diagram of the overall structure of the edge folding and sealing mechanism in an embodiment of the present utility model.

[0023] Figure 8 It is a schematic diagram of the overall structure of the drying device in an embodiment of the present utility model.

[0024] Figure 9 It is a schematic diagram of the overall structure of the upper pressing roller or the lower pressing roller in an embodiment of the present utility model.

[0025] Figure 10 It is a schematic diagram of the overall structure of the traction mechanism in an embodiment of the present utility model.

[0026] Figure 11 It is a schematic diagram of the overall structure of the traction mechanism from another perspective in an embodiment of the present utility model.

[0027] Figure 12 It is a schematic diagram of the overall structure of the release paper sticking mechanism in an embodiment of the present utility model.

[0028] Figure 13 This is a schematic diagram of the overall structure of the rotating disk in an embodiment of the present utility model.

[0029] Figure 14 This is a schematic diagram of the overall structure of the rotating collection mechanism in an embodiment of the present utility model.

[0030] Figure 15 This is a schematic diagram of the overall structure of the unwinding mechanism in an embodiment of the present utility model.

[0031] Figure 16 This is a schematic diagram of the overall structure of the ramp traction mechanism in an embodiment of the present utility model. Specific embodiments

[0032] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] See Figures 1 - 16 , this paper production line includes an upper production line a and a lower production line b. The upper production line a includes a plurality of traction mechanisms 1, a guide roller conveying mechanism 2, a first gluing mechanism 3, a second gluing mechanism 4, a drying device 5, an indentation mechanism 6, a hemming mechanism 7, and a folding and sealing mechanism 8. The lower production line b includes a plurality of unwinding mechanisms 9. The unwinding mechanism 9 is docked with the traction mechanism 1, and the traction mechanism 1 is docked with the guide roller conveying mechanism 2. The guide roller conveying mechanism 2 is used to convey the paper to the first gluing mechanism 3, the second gluing mechanism 4, the drying device 5, the indentation mechanism 6, the hemming mechanism 7, and the folding and sealing mechanism 8 respectively.

[0034] The first gluing mechanism 3 includes a pressure roller 10, a glue delivery roller 11, a glue feeding roller 12, and a glue tray 13 arranged vertically in sequence. The lower part of the glue feeding roller 12 extends into the glue tray 13. The paper is conveyed between the pressure roller 10 and the glue delivery roller 11. When the glue feeding roller 12 rotates, the glue in the glue tray 13 is conveyed to the glue delivery roller 11. When the glue delivery roller 11 rotates, the glue is applied to the paper. The first gluing mechanism 3 further includes three first motors 36 and a first cylinder 37. The three first motors 36 are respectively drivingly connected to the pressure roller 10, the glue delivery roller 11, and the glue feeding roller 12 to drive the pressure roller 10, the glue delivery roller 11, and the glue feeding roller 12 to rotate. The first cylinder 37 is drivingly connected to the pressure roller 10 to drive the pressure roller 10 to move up and down. The downward movement of the pressure roller 10 can make the glue fully applied to the paper. The upper production line a further includes a bonding mechanism (not shown in the figure). After the paper is coated with glue, the two papers are bonded together through the bonding mechanism. Six unwinding mechanisms 9 and six traction mechanisms 1 are provided to convey six pieces of paper from the lower production line b to the upper production line a and bond the six pieces of paper together through the bonding mechanism, so that the finally produced kraft paper has a six-layer paper structure.

[0035] The second gluing mechanism 4 includes a gluing support 14 and a glue spraying gun 15 movably arranged on the gluing support 14. When the glue spraying gun 15 moves, glue is applied to the paper. The glue spraying gun 15 is driven by a motor or a cylinder. The glue spraying gun 15 is used to apply glue to the edge of the paper, and then the edge of the paper is folded by the edge folding and sealing mechanism 8 to form a folded edge, and then the edge is pressed by the edge pressing mechanism 7 so that the folded edge is adhered to the paper, thereby sealing the paper.

[0036] The indentation mechanism 6 includes a first driver 16, an upper pressure roller 17 and a lower pressure roller 18. The first driver 16 is drivingly connected to the upper pressure roller 17. The first driver 16 is a cylinder. A first protrusion 19 is arranged on the upper pressure roller 17, and a second protrusion 20 is arranged on the lower pressure roller 18. The paper is conveyed between the upper pressure roller 17 and the lower pressure roller 18. The first driver 16 drives the upper pressure roller 17 to move downward, and the first protrusion 19 and the second protrusion 20 cooperate with each other to indent the edge of the paper. The indentation mechanism 6 further includes a second motor 38. The second motor 38 is drivingly connected to the lower pressure roller 18 and the upper pressure roller 17 through a belt assembly 39. The lower pressure roller 18 is connected to a driving wheel, and the upper pressure roller 17 is connected to a driven wheel to drive the lower pressure roller 18 and the upper pressure roller 17 to rotate, thereby conveying the paper.

[0037] The edge pressing mechanism 7 includes a second driver 21, a first edge pressing belt assembly 22 and a second edge pressing belt assembly 23. The second driver 21 is drivingly connected to the first edge pressing belt assembly 22. The second driver 21 is a cylinder. The paper is conveyed between the first edge pressing belt assembly 22 and the second edge pressing belt assembly 23. The second driver 21 drives the first edge pressing belt assembly 22 to move downward to press the paper. The edge pressing mechanism 7 further includes a third motor, a rotating shaft 41, a first gear 42 and a second gear 43. The first edge pressing belt assembly 22 includes a first edge pressing rubber wheel 44, a first adjusting pulley 45 and a first belt 46. The first belt 46 is arranged between the first edge pressing rubber wheel 44 and the first adjusting pulley 45. The second edge pressing belt assembly 23 includes a second edge pressing rubber wheel 47, a second adjusting pulley 48 and a second belt 49. The second belt 49 is arranged between the second edge pressing rubber wheel 47 and the second adjusting pulley 48. The third motor is drivingly connected to the rotating shaft 41. The second gear 43 and the second edge pressing rubber wheel 47 are installed on the rotating shaft 41. The first edge pressing rubber wheel 44 is drivingly connected to the first gear 42. The first gear 42 and the second gear 43 mesh with each other. Through the above connection structure, the first belt 46 and the second belt 49 can be driven to move to convey the paper. The edge pressing mechanism 7 further includes a handwheel adjusting assembly to adjust the width of the first edge pressing belt assembly 22 and the second edge pressing belt assembly 23.

[0038] The hemming and edge-sealing mechanism 8 includes an indentation device 24, a hemming device 25, and an edge-overlapping device 26. When the paper is conveyed to the indentation device 24, the indentation device 24 acts on the edge of the paper to press out a crease. When the paper is conveyed to the hemming device 25, it acts on the hemming device 25, causing the hemming device 25 to fold up the edge of the paper along the crease to form a hem. When the paper is conveyed to the edge-overlapping device 26, the edge-overlapping device 26 acts on the hem to overlap the hem on the paper.

[0039] The indentation device 24 includes a second air cylinder 40, an upper creasing wheel 50, and a lower creasing wheel 51. The second air cylinder 40 is drivingly connected to the upper creasing wheel 50, and the upper creasing wheel 50 is located above the lower creasing wheel 51. When the paper is conveyed to the indentation device 24, the second air cylinder 40 drives the upper creasing wheel 50 to press down, and the upper creasing wheel 50 presses the edge of the paper against the lower creasing wheel 51 to press out a crease on the edge of the paper.

[0040] The hemming device 25 includes a first roller 52 and a second roller 53. The first roller 52 is inclined and arranged above the second roller 53. When the paper is conveyed to the hemming device 25, it acts on the first roller 52 and the second roller 53, causing the first roller 52 and the second roller 53 to rotate. When the first roller 52 and the second roller 53 rotate, they act on the crease of the paper to fold up the edge of the paper to form a hem.

[0041] The edge-overlapping device 26 includes a second mounting plate assembly 54 and an edge-overlapping block 55. The edge-overlapping block 55 is mounted on the second mounting plate assembly 54. An edge-overlapping groove 56 is formed between the edge-overlapping block 55 and the second mounting plate assembly 54. A pressing edge 57 is provided at the top of the edge-overlapping groove 56, and the height of the pressing edge 57 gradually decreases along the paper conveying direction. When the paper is conveyed to the edge-overlapping device 26, the edge of the paper passes through the edge-overlapping groove 56, and the pressing edge 57 acts on the hem to overlap the hem on the paper.

[0042] For the specific structure of the hemming and edge-sealing mechanism 8, reference can be made to Patent CN117507483A.

[0043] A platform device 27 is provided between the upper production line a and the lower production line b. The traction mechanism 1, the guide roller conveying mechanism 2, the first gluing mechanism 3, the second gluing mechanism 4, the drying device 5, the indentation mechanism 6, the edge-pressing mechanism 7, and the hemming and edge-sealing mechanism 8 are installed on the upper part of the platform device 27. The unwinding mechanism 9 is located at the bottom of the platform device 27. A paper passing groove (not shown in the figure) is provided on the platform device 27. When the traction mechanism 1 and the unwinding mechanism 9 are working, the paper on the unwinding mechanism 9 is conveyed to the traction mechanism 1 through the paper passing groove, and the traction mechanism 1 conveys the paper to the guide roller conveying mechanism 2.

[0044] There are two types of traction mechanisms 1, namely the first traction mechanism 59 and the second traction mechanism 60 respectively; the first traction mechanism 59 includes a fourth motor 61, a first conveying roller 62 and a second conveying roller 63. The fourth motor 61 is drivingly connected to the second conveying roller 63 to drive the second conveying roller 63 to rotate. The first conveying roller 62 is a driven roller, and the paper is conveyed between the first conveying roller 62 and the second conveying roller 63; the second traction mechanism 60 includes a fifth motor 64, a sixth motor 65, a third conveying roller 66, a fourth conveying roller 67 and a guiding roller 68. The fifth motor 64 is drivingly connected to the fourth conveying roller 67 to drive the fourth conveying roller 67 to rotate. The third conveying roller 66 is a driven roller. The sixth motor 65 is drivingly connected to the guiding roller 68 to drive the guiding roller 68 to rotate. A plurality of protrusions 58 for cooperating with honeycomb paper are provided on the surface of the guiding roller 68. Under the guidance of the guiding roller 68, the paper is conveyed between the third conveying roller 66 and the fourth conveying roller 67; the first traction mechanism 59 is used to traction ordinary paper, and the second traction mechanism 60 is used to traction honeycomb paper; the above six-layer kraft paper contains ordinary paper and honeycomb paper.

[0045] The unwinding mechanism 9 is an existing unwinder. The guide roller conveying mechanism 2 includes a plurality of conveying roller assemblies. The drying device 5 is an oven for drying glue.

[0046] It further includes a post-treatment production line c. The post-treatment production line c includes a post-indentation mechanism 28, a release paper pasting mechanism 29, a defect detection mechanism, a cutting mechanism, a paper receiving mechanism, a rejection mechanism, a rotary collection mechanism 30, and a feeding roller mechanism that are connected in sequence. The feeding roller mechanism conveys the paper to the post-indentation mechanism 28, the release paper pasting mechanism 29, the defect detection mechanism, the cutting mechanism, the paper receiving mechanism, the rejection mechanism, and the rotary collection mechanism 30 in sequence; the post-indentation mechanism 28 is used to indent the paper, the release paper pasting mechanism 29 is used to paste release paper on the paper, the defect detection mechanism is used to detect whether there are defects on the paper and whether it is a qualified product, the cutting mechanism is used to cut out the paper finished product, the paper receiving mechanism is used to catch the paper finished product, and the rejection mechanism is used to reject unqualified paper finished products. The above structures are existing technologies and will not be described in detail here.

[0047] It further includes a ramp traction mechanism 31. The upper production line a, the ramp traction mechanism 31 and the post-treatment production line c are connected in sequence. The paper on the upper production line a is conveyed to the post-treatment production line c through the ramp traction mechanism 31. The post-treatment production line c is located below the upper production line a; a guide wheel device 69 for conveying paper is provided on the ramp traction mechanism 31.

[0048] The rotating collection mechanism 30 includes a first conveying component 31 and a second conveying component 32 for transversely conveying paper, and a rotating disk 33 arranged between the first conveying component 31 and the second conveying component 32. The rotating disk 33 is provided with slots 34 distributed in an annular manner, and the second conveying component 32 is provided with a collecting groove 35. When the first conveying component 31 conveys the paper to the rotating disk 33, the paper is transversely inserted into the slots 34, and the rotating disk 33 rotates to flip the paper downward so that the paper is arranged vertically and falls into the collecting groove 35.

[0049] A plurality of partitions 70 are spaced apart and distributed transversely on the second conveying assembly 32 , and a collecting trough 35 is formed between two adjacent partitions 70 .

[0050] Insert edges 71 are distributed in an annular manner around the rotating disk 33 , and slots 34 are formed between two adjacent insert edges 71 ; after a paper falls into the collecting slot 35 , it escapes from the slot 34 , and when the paper escapes from the slot 34 , it is sandwiched between the insert edge 71 and the partition 70 or another paper.

[0051] It also includes a seventh motor and a gear assembly 72 . The seventh motor is drivingly connected to the gear assembly 72 . The gear assembly 72 is drivingly connected to the rotating disk 33 to drive the rotating disk 33 to rotate.

[0052] When the paper is transported on the first transport assembly 31 , the paper is transversely arranged on the first transport assembly 31 . When the paper is transported on the second transport assembly 32 , the paper is vertically stacked and arranged on the collecting trough 35 .

[0053] The gear assembly 72 is connected to the rotating disk 33 via a rotating shaft 73 , and the rotating disk 33 is longitudinally distributed on the rotating shaft 73 .

[0054] The first conveying assembly 31 and the second conveying assembly 32 are conveying belts; the paper is conveyed to the rotating disk 33 through the first conveying assembly 31, and the rotating disk 33 rotates to flip the paper into a vertical setting, and then the paper falls into the collecting trough 35, and the paper is stacked in the collecting trough 35. The second conveying assembly 32 conveys the paper in the collecting trough 35 to the unloading position to realize automatic collection of the paper.

[0055] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A paper production line, characterized in that: It includes an upper production line (a) and a lower production line (b). The upper production line (a) includes a traction mechanism (1), a guide roller conveying mechanism (2), a first gluing mechanism (3), a second gluing mechanism (4), a drying device (5), a scoring mechanism (6), a hemming mechanism (7), and a hemming and sealing mechanism (8). The lower production line (b) includes several unwinding mechanisms (9). The unwinding mechanism (9) is docked with the traction mechanism (1), and the traction mechanism (1) is docked with the guide roller conveying mechanism (2). The guide roller conveying mechanism (2) is used to convey the paper to the first gluing mechanism (3), the second gluing mechanism (4), the drying device (5), the scoring mechanism (6), the hemming mechanism (7), and the hemming and sealing mechanism (8) respectively.

2. The paper production line according to claim 1, characterized in that: The first gluing mechanism (3) includes a pressure roller (10), a glue delivery roller (11), a glue feeding roller (12), and a glue tray (13) arranged successively from top to bottom. The lower part of the glue feeding roller (12) extends into the glue tray (13). The paper is conveyed between the pressure roller (10) and the glue delivery roller (11). When the glue feeding roller (12) rotates, it conveys the glue in the glue tray (13) to the glue delivery roller (11). When the glue delivery roller (11) rotates, it applies the glue to the paper.

3. The paper production line according to claim 2, characterized in that: The second gluing mechanism (4) includes a gluing bracket (14) and a glue spraying gun (15) movably arranged on the gluing bracket (14). When the glue spraying gun (15) moves, it applies the glue to the paper.

4. The paper production line according to claim 3, wherein: The scoring mechanism (6) includes a first driver (16), an upper pressure roller (17), and a lower pressure roller (18). The first driver (16) is drivingly connected to the upper pressure roller (17). A first protrusion (19) is arranged on the upper pressure roller (17), and a second protrusion (20) is arranged on the lower pressure roller (18). The paper is conveyed between the upper pressure roller (17) and the lower pressure roller (18). The first driver (16) drives the upper pressure roller (17) to move downward, and the first protrusion (19) and the second protrusion (20) cooperate with each other to score the paper.

5. The paper production line according to claim 4, wherein: The hemming mechanism (7) includes a second driver (21), a first hemming belt assembly (22), and a second hemming belt assembly (23). The second driver (21) is drivingly connected to the first hemming belt assembly (22). The paper is conveyed between the first hemming belt assembly (22) and the second hemming belt assembly (23). The second driver (21) drives the first hemming belt assembly (22) to move downward to hem the paper.

6. The paper production line according to claim 4, wherein: The hemming and sealing mechanism (8) includes a scoring device (24), a hemming device (25), and an edge overlapping device (26). When the paper is conveyed to the scoring device (24), the scoring device (24) acts on the edge of the paper to press out a crease. When the paper is conveyed to the hemming device (25), it acts on the hemming device (25) so that the hemming device (25) folds up the edge of the paper through the crease to form a hem. When the paper is conveyed to the edge overlapping device (26), the edge overlapping device (26) acts on the hem so that the hem overlaps on the paper.

7. The paper production line according to claim 6, characterized in that: A platform device (27) is arranged between the upper production line (a) and the lower production line (b). The traction mechanism (1), the guide roller conveying mechanism (2), the first gluing mechanism (3), the second gluing mechanism (4), the drying device (5), the indentation mechanism (6), the edge pressing mechanism (7) and the hemming and edge sealing mechanism (8) are installed on the upper part of the platform device (27). The unwinding mechanism (9) is located at the bottom of the platform device (27). A paper passing slot is arranged on the platform device (27). When the traction mechanism (1) and the unwinding mechanism (9) work, the paper on the unwinding mechanism (9) is conveyed to the traction mechanism (1) through the paper passing slot.

8. The paper production line according to claim 7, wherein: It further includes a post-treatment production line (c), and the post-treatment production line (c) includes a post-indentation mechanism (28), a release paper pasting mechanism (29), a defect detection mechanism, a cutting mechanism, a material receiving mechanism, a rejection mechanism, a rotary collection mechanism (30), and a feed roller mechanism that are connected in sequence. The feed roller mechanism conveys the paper to the post-indentation mechanism (28), the release paper pasting mechanism (29), the defect detection mechanism, the cutting mechanism, the material receiving mechanism, the rejection mechanism, and the rotary collection mechanism (30) in sequence.

9. The paper production line according to claim 8, characterized in that: It further includes a ramp traction mechanism (31). The upper production line (a), the ramp traction mechanism (31) and the post-treatment production line (c) are connected in sequence. The paper on the upper production line (a) is conveyed to the post-treatment production line (c) through the ramp traction mechanism (31).

10. The paper production line according to claim 8, characterized in that: The rotary collection mechanism (30) includes a first conveying component (31) and a second conveying component (32) for horizontally conveying the paper, and a rotating disk (33) arranged between the first conveying component (31) and the second conveying component (32). Slots (34) are annularly distributed on the rotating disk (33). A collection groove (35) is arranged on the second conveying component (32). When the first conveying component (31) conveys the paper to the rotating disk (33), the paper is horizontally inserted into the slots (34). The rotating disk (33) rotates to turn the paper downward so that the paper is vertically arranged and falls into the collection groove (35).