A modern paper machine for producing synthetic polymer-free rice paper

Abstract

This invention relates to the field of Xuan paper production, specifically to a specialized modern papermaking machine for producing Xuan paper without synthetic polymers. The papermaking machine includes an interconnected pulp tank and headbox. Inside the headbox, a cylindrical wire cage with its lower part immersed in the pulp is rotatably mounted. As the cylindrical wire cage rotates, a loose, wet sheet is formed on the wire surface. An air compressor is located beside the pulp tank. A closed-loop long wire is located on one side of the cylindrical wire cage. The long wire is tangential to the outer wall of the cylindrical wire cage, forming a transfer bonding area. A peeling mechanism is provided in the transfer bonding area to transfer the wet sheet to the long wire. The peeling mechanism includes a peeling plate with a main air channel connected to the air compressor. One end of the peeling plate has a rubber cone plate with a peeling air channel, and the other end has a peeling water channel. A pressing mechanism is located at the upper end of the peeling plate. This invention enables continuous production of Xuan paper, fully preserving the core qualities of traditional Xuan paper. The wet sheet is transferred without damage or residue, exhibiting strong production stability and suitability for large-scale continuous production of Xuan paper.

Description

Technical Field

[0001] This invention relates to the field of Xuan paper production, specifically to a specialized modern papermaking machine for producing Xuan paper without synthetic polymers. Background Technology

[0002] Traditional Xuan paper production relies entirely on manual craftsmanship, involving multiple processes such as material selection, pounding, papermaking, pressing, and drying. The core papermaking process heavily depends on the experience and collaborative operation of skilled craftsmen. However, manual production suffers from low efficiency, and the daily output of a single craftsman is limited, resulting in high production costs. In addition, product quality is greatly affected by the craftsman's technique and the ambient temperature and humidity. Xuan paper has poor thickness and uniformity stability, making standardized mass production impossible. Furthermore, the long-term high humidity in the Xuan paper production environment can easily cause rheumatic occupational diseases in workers due to prolonged soaking. At the same time, the production capacity bottleneck severely restricts the popularization and inheritance of Xuan paper culture.

[0003] While existing general-purpose modern papermaking equipment can achieve high-speed, continuous paper production, its forming, dewatering, and pressing processes are designed for ordinary cultural and industrial paper, and cannot meet the production needs of Xuan paper. Specifically, the forming process of general-purpose papermaking machines often uses high-concentration pulp onto the wire and high-vacuum forced dewatering, which severely damages the natural, loose, interwoven structure formed by the long fibers of *Pterocarya stenoptera* bark and *Rhizophora stylosa* straw. This results in excessively high paper density and insufficient bulk, completely losing the unique ink absorption and ink-retaining properties and effects characteristic of Xuan paper. Furthermore, the wet paper transfer process in existing papermaking machines often uses hard doctor blades for forced scraping or high-vacuum negative pressure adsorption, which easily causes paper tearing, fiber structure damage, and fiber residue on the wire surface for wet paper like Xuan paper, which has high moisture content and extremely low wet strength, making stable, continuous production impossible.

[0004] Current attempts at mechanized production of Xuan paper in the industry mainly focus on semi-mechanized modifications to auxiliary processes such as pulping and drying, failing to overcome the technological bottlenecks in the core forming and wet sheet transfer stages. Existing solutions either produce imitation Xuan paper products with physicochemical properties that differ significantly from traditional Xuan paper, failing to meet the core requirements of calligraphy and painting, or still rely on manual assistance for wet sheet transfer, making continuous production impossible and failing to fundamentally resolve the contradiction between production capacity and quality in handmade Xuan paper. Therefore, we need to design a modern papermaking machine that can achieve continuous mechanized production of Xuan paper while fully preserving the core qualities of traditional Xuan paper. Summary of the Invention

[0005] Therefore, it is necessary to provide a specialized modern papermaking machine for producing Xuan paper without synthetic polymers, addressing the existing technical problems.

[0006] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0007] A specialized modern papermaking machine for producing synthetic polymer-free Xuan paper includes:

[0008] The pulp mixing tank and the headbox are arranged side by side. The pulp mixing tank and the headbox are connected. Inside the headbox, there is a rotating cylindrical wire cage with the lower part immersed in the pulp. When the cylindrical wire cage rotates, the pulp forms a loose wet paper sheet on the wire surface of the cylindrical wire cage. An air compressor is set next to the pulp mixing tank.

[0009] A closed-loop long wire is provided on the side of the cylinder wire cage near the pulp mixing tank. The long wire is tangent to the outer wall of the cylinder wire cage to form a transfer bonding area. The transfer bonding area is provided with a peeling mechanism that transfers the wet paper sheet on the outer wall of the cylinder wire cage to the upper end of the long wire. The peeling mechanism includes a peeling plate with a main air passage in the middle, and the main air passage is connected to the output end of the air compressor.

[0010] One end of the peeling plate is elastically provided with a rubber cone plate that abuts against the outer wall of the circular mesh cage. The upper end of the rubber cone plate is provided with peeling air channels that communicate with the main air channel at equal intervals. The other end of the peeling plate is flush with the upper end of the long net and is provided with peeling water channels at equal intervals.

[0011] The upper end of the peeling plate is equipped with a roll pressing mechanism for preliminary dehydration of the wet paper sheet.

[0012] Furthermore, two flow-stabilizing baffles are symmetrically installed at the bottom of the mixing tank and the headbox, with the side of the two flow-stabilizing baffles that are close to each other being concave.

[0013] The headbox is equipped with a rotating stirring mechanism to agitate the slurry.

[0014] Furthermore, a ring conveyor chain is installed on the side of the round wire mesh cage, and the two sides of the long net are fixedly connected to the ring conveyor chain. The ring conveyor chain drives the long net to operate in a closed loop.

[0015] Furthermore, the flat roll pressing mechanism includes a main roll that is rotatably mounted above the rubber cone plate. When the main roll rotates, it drives the wet paper sheet that has been peeled off by the rubber cone plate to move toward the wire mesh.

[0016] A bearing seat is fixed to the lower end of the rubber cone plate. Two guide shafts are fixed to the side of the bearing seat near the peeling plate. The guide shafts are slidably connected to the peeling plate. A spring is sleeved on the outside of the guide shaft. One end of the spring is fixed to the bearing seat and the other end is fixed to the peeling plate.

[0017] Furthermore, a lifting roller is rotatably connected to one end of the rubber cone plate near the long net, and an auxiliary roller that is rotatably connected to the peeling plate is provided on the side of the lifting roller near the long net.

[0018] The press mechanism also includes a secondary roller that is rotatably arranged on the side close to the lifting roller and the auxiliary roller. When the wet paper sheet moves to the lower end of the secondary roller, the upper end of the wet paper sheet abuts against the secondary roller, and the lower end abuts against the lifting roller and the auxiliary roller respectively.

[0019] Furthermore, branch air passages are provided at equal intervals on the side of the main air passage near the rubber cone plate. One end of the branch air passage is connected to the main air passage, and the other end is connected to the stripping air passage.

[0020] A rubber plate is provided at the lower end of the peeling plate. One end of the rubber plate is fixed to the peeling plate, and the other end is abutted against the rubber cone plate in a dynamic seal.

[0021] Furthermore, atomizing nozzles are arranged in an equally spaced array on the side of the main roller and the auxiliary roller that are close to each other, and the atomizing nozzles are connected to the water source through water pipes;

[0022] The upper end of the rubber cone plate is provided with equally spaced water leakage holes, which are located directly below the atomizing nozzle. Two water-blocking arc strips are provided on both sides of the water leakage holes. One water-blocking arc strip is fixedly connected to the upper end of the rubber cone plate, and the other water-blocking arc strip is fixedly connected to the upper end of the peeling plate.

[0023] The upper end of the rubber sheet is provided with a water-proof arc plate that is fixedly connected to the peeling plate. The lower end of the bearing seat is slidably connected to the water-proof arc plate. An avoidance hole for airflow is opened in the middle of the bearing seat. A corrugated pipe is provided at the upper end of the water-proof arc plate. The upper end of the corrugated pipe is fixedly connected to the water leakage hole, and the lower end is connected to the cavity formed by the water-proof arc plate and the rubber sheet. A water leakage hole for water to pass through is opened at the lower end of the rubber sheet. The water sprayed from the atomizing nozzle passes through the water leakage hole, the corrugated pipe and the leakage hole in sequence to flush the outer wall of the circular mesh cage.

[0024] Furthermore, each branch airway has a lifting airway in the middle section. The lifting airway is located on the side of the lifting roller near the auxiliary roller. The upper end of the lifting airway is coaxially connected to an air plate. The upper end of the air plate has air holes arranged in an equal angle along the circumferential direction.

[0025] Furthermore, a secondary roller is rotatably installed above the peeling plate near one end of the wire. When the wet paper sheet moves to the upper end of the peeling channel, the secondary roller applies a downward pressing force to the wet paper sheet during rotation.

[0026] Each stripping channel is equipped with a water distribution plate at its upper end, and the water distribution plate has grating holes at equal intervals along its long side for water to pass through.

[0027] Furthermore, the long network is equipped with a vacuum dehydration box at the upper end of the equally spaced array.

[0028] The beneficial effects of this invention compared to the prior art are:

[0029] Firstly, this papermaking machine breaks through the technical limitations of traditional handmade Xuan paper and general papermaking machines, realizing continuous and mechanized production of Xuan paper throughout the entire process, greatly improving production efficiency, eliminating dependence on skilled craftsmen, and fundamentally solving the problems of low production capacity, high cost, and poor quality stability of traditional handmade Xuan paper. This papermaking machine uses a low-speed rotating cylindrical cage to adsorb and form the paper, perfectly simulating the natural settling and interweaving process of fibers in handmade paper making, so that the wet paper sheet forms a loose and porous structure consistent with traditional handmade Xuan paper, fully preserving the unique ink absorption and wetting properties of Xuan paper. While achieving large-scale production, it maintains the characteristics and quality of traditional Xuan paper.

[0030] Secondly, this papermaking machine is designed with a special air-water synergistic peeling mechanism to address the characteristics of Xuan paper's high moisture content and extremely low wet strength. This completely solves the industry problems of easy tearing during wet paper transfer, easy damage to fiber structure, and easy residue on the wire surface in existing technologies. By breaking down fiber adsorption through airflow and using a synergistic effect of flexible contact to avoid damage from hard contact, the machine achieves the complete and damage-free transfer of the wet paper. At the same time, it can simultaneously complete the online cleaning of the wire surface, ensuring long-term continuous and stable operation of the equipment, significantly improving the paper qualification rate and production continuity, and providing core technical support for the mechanized production of Xuan paper throughout the entire process. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of an embodiment;

[0032] Figure 2 This is a half-sectional view of the planar structure of the embodiment;

[0033] Figure 3 yes Figure 2 Enlarged view of the structure at point A in the middle;

[0034] Figure 4 yes Figure 2 Structural cut-off diagram at point P;

[0035] Figure 5 yes Figure 4 Enlarged view of the structure at point B in the middle;

[0036] Figure 6 yes Figure 4 Enlarged view of the structure at point C;

[0037] Figure 7 This is a three-dimensional half-sectional view of the embodiment;

[0038] Figure 8 yes Figure 7 Enlarged view of the structure at point D;

[0039] Figure 9 yes Figure 7 Enlarged view of the structure at point E in the middle.

[0040] The numbers on the map are:

[0041] 1. Pulp mixing tank; 2. Headbox; 3. Flow stabilizing baffle; 4. Agitator; 5. Circular mesh cage; 6. Long mesh; 7. Circular conveyor chain; 8. Stripping mechanism; 9. Stripping plate; 10. Main air duct; 11. Branch air duct; 12. Lifting air duct; 13. Air plate; 14. Air hole; 15. Rubber plate; 16. Leakage hole; 17. Water-blocking arc strip; 18. Water leakage hole; 19. Corrugated pipe; 20. Water-blocking arc plate; 21. Rubber cone plate; 22. Lifting roller; 23. Auxiliary roller; 24. Guide shaft; 25. Spring; 26. Shaft seat; 27. Clearance hole; 28. Stripping air duct; 29. ​​Stripping water duct; 30. Water distribution plate; 31. Flat roller pressing mechanism; 32. Main roller; 33. Auxiliary roller; 34. Atomizing nozzle; 35. Secondary roller; 36. Vacuum dewatering box; 37. Air compressor. Detailed Implementation

[0042] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0043] refer to Figures 1 to 9 A specialized modern papermaking machine for producing synthetic polymer-free Xuan paper includes:

[0044] The pulp mixing tank 1 and the headbox 2 are arranged side by side. The pulp mixing tank 1 and the headbox 2 are connected. Inside the headbox 2, there is a rotating circular wire cage 5 that is immersed in the pulp in the headbox 2. When the circular wire cage 5 rotates, the pulp forms a loose wet paper sheet on the wire surface of the circular wire cage 5. An air compressor 37 is arranged next to the pulp mixing tank 1.

[0045] A closed-loop long wire 6 is provided on the side of the round wire cage 5 near the pulp mixing tank 1. The long wire 6 is tangent to the outer wall of the round wire cage 5 to form a transfer bonding area. The transfer bonding area is provided with a peeling mechanism 8 that transfers the wet paper sheet at the outer wall of the round wire cage 5 to the upper end of the long wire 6. The peeling mechanism 8 includes a peeling plate 9 with a main air passage 10 in the middle. The main air passage 10 is connected to the output end of the air compressor 37.

[0046] One end of the peeling plate 9 is elastically provided with a rubber cone plate 21 that abuts against the outer wall of the circular mesh cage 5. The upper end of the rubber cone plate 21 is provided with peeling air channels 28 that communicate with the main air channel 10 at equal intervals. The other end of the peeling plate 9 is flush with the upper end of the long net 6 and is provided with peeling water channels 29 at equal intervals.

[0047] The upper end of the peeling plate 9 is equipped with a flat roller pressing mechanism 31 for preliminary dewatering of the wet paper sheet.

[0048] During operation, the pulp mixing tank 1 thoroughly mixes the *Pterocarya stenoptera* bark pulp and *Satay rice straw* pulp in a traditional ratio, and then feeds them into the connected headbox 2, maintaining a stable low-concentration dispersion of the pulp. The cylinder wire mesh 5 rotates continuously at a low speed, its lower part continuously immersed in the pulp in the headbox 2. The long fibers in the pulp, under the adsorption of the mesh surface of the cylinder wire mesh 5, naturally interweave to form a loose, uniformly thick, and porous wet paper sheet. This process simulates the fiber settling process of hand-rolled papermaking, avoiding violent shearing and compression, and maintaining the natural cloud-like interwoven structure of the wet paper sheet, laying the foundation for subsequent peeling and paper quality. Simultaneously, the air compressor 37 continuously supplies air, providing a stable air source for the main air duct 10, preparing the peeling mechanism 8 with power.

[0049] Subsequently, when the cylindrical wire cage 5, carrying the wet paper sheet, rotates to the transfer and bonding area tangential to the closed-loop long wire 6, the peeling mechanism 8 starts working. Gas output from the air compressor 37 enters the main air passage 10 of the peeling plate 9, and is then evenly sprayed out through the peeling air passage 28 on the rubber cone plate 21, forming a uniform air film between the wet paper sheet and the surface of the cylindrical wire cage 5. This breaks the microscopic adhesion between the fibers and the wire surface, allowing the wet paper sheet to quickly detach. The rubber cone plate 21 remains elastically pressed against the outer wall of the cylindrical wire cage 5, ensuring both air film sealing and preventing scratches on the wire surface and the wet paper sheet. After peeling, the wire surface of the cylindrical wire cage 5 is gently rinsed with cleaning water (the specific spraying method of the cleaning water will be explained in detail later), removing residual microfibers from the wire surface in real time, ensuring the cleanliness of the wire surface for the next round of fiber formation. Under the triple action of air-push release, flexible contact, and synchronous cleaning, the wet paper sheet is transferred completely and smoothly to the upper end of the closed-loop long wire 6, and is conveyed forward synchronously with the long wire 6, achieving efficient transfer without tearing, deformation, or residue throughout the entire process.

[0050] Finally, the initial dewatering and shaping are performed by the flat roller pressing. The transferred wet paper sheet enters the flat roller pressing mechanism 31 at the top of the peeling plate 9 along with the closed-loop wire 6. The flat roller pressing mechanism 31 performs gentle and gradual deep dewatering on the wet paper sheet with extremely low linear pressure, removing only free water without compressing the internal pore structure of the paper sheet, thus maximizing the retention of the Xuan paper's bulk and ink absorption. The water squeezed out is uniformly received by the peeling channel 29 and quickly drained away, preventing water from seeping back into the wet paper sheet. The peeling channel 29 serves as a drainage channel.

[0051] Finally, after gentle pressing, the moisture content of the wet paper is reduced to a suitable range, the wet strength is significantly improved, and the paper shape is stable, flat, and wrinkle-free, allowing it to smoothly enter the subsequent drying and winding processes. The entire machine achieves continuous production of Xuan paper through a progressive workflow, combining production efficiency with the core quality of traditional Xuan paper.

[0052] To ensure uniform slurry distribution within the headbox 2, the following features are specifically included:

[0053] like Figure 2 and Figure 7As shown, two flow stabilizing baffles 3 are symmetrically arranged at the bottom of the mixing tank 1 and the headbox 2, respectively, and the side of the two flow stabilizing baffles 3 that are close to each other is concave.

[0054] The headbox 2 is equipped with a rotating stirring mechanism 4 to agitate the slurry.

[0055] The flow stabilizing baffle 3 in the pulp mixing tank 1 rectifyes the incoming pulp through its concave structure, eliminating turbulence and pulses during pulp transportation and ensuring a uniform and stable pulp flow rate. The flow stabilizing baffle 3 in the headbox 2 further homogenizes the pulp entering the box. Combined with the low-speed continuous rotation of the stirring mechanism 4, it continuously disperses the fiber flocs in the pulp, ensuring that the long fibers of the pine bark and the short fibers of the rice straw are evenly dispersed in the pulp, avoiding fiber sedimentation and stratification. This ensures that the wet paper sheets adsorbed and formed on the surface of the round wire mesh 5 are of uniform thickness and have consistent fiber interweaving, thus guaranteeing the uniformity and quality stability of the paper from the source.

[0056] To achieve the circular movement of Long Network 6, the following features were specifically designed:

[0057] like Figure 7 As shown, a circular conveyor chain 7 is provided on the side of the cylindrical wire cage 5. The two sides of the long wire 6 are fixedly connected to the circular conveyor chain 7. The circular conveyor chain 7 achieves closed-loop rotation through the sprockets at both ends and the drive mechanism. The two sides of the long wire 6 are fixedly connected to the circular conveyor chain 7 throughout the entire process, so that the long wire 6 achieves uniform closed-loop operation under the drive of the circular conveyor chain 7. During the operation, the surface of the long wire 6 remains flat and wrinkle-free. At the same time, through the synchronous transmission control of the circular conveyor chain 7, the running linear speed of the long wire 6 is completely matched with the rotation linear speed of the cylindrical wire cage 5, avoiding problems such as stretching and tearing caused by speed difference during the transfer of wet paper sheets, and ensuring the stability of wet paper sheet transfer and conveying.

[0058] To provide a detailed explanation of the elastic structure of the rubber cone plate 21, the following features are also provided:

[0059] like Figure 2 and Figure 5 As shown, the flat roll pressing mechanism 31 includes a main roll 32 rotatably disposed above the rubber cone plate 21. When the main roll 32 rotates, it drives the wet paper sheet peeled off by the rubber cone plate 21 to move towards the wire 6.

[0060] A bearing seat 26 is fixedly connected to the lower end of the rubber cone plate 21. Two guide shafts 24 are fixedly connected to the side of the bearing seat 26 near the peeling plate 9. The guide shafts 24 are slidably connected to the peeling plate 9. A spring 25 is sleeved on the outside of the guide shafts 24. One end of the spring 25 is fixedly connected to the bearing seat 26, and the other end is fixedly connected to the peeling plate 9.

[0061] During operation, the main roller 32 rotates at a linear speed synchronized with the wire mesh 6 and the cylindrical wire cage 5, providing forward traction power for the transfer of wet paper sheets and preventing accumulation and wrinkling after the wet paper sheets are loosened. The rubber cone plate 21 is elastically and floatingly connected to the peeling plate 9 through the guide shaft 24 and the spring 25. When the surface of the cylindrical wire cage 5 experiences slight jumping or wear, the spring 25 can push the rubber cone plate 21 to adaptively adjust its position in real time, so that the rubber cone plate 21 always keeps in close contact with the outer wall of the cylindrical wire cage 5. This ensures that the air film formed by the airflow ejected from the peeling air channel 28 does not leak, ensuring the loosening effect of the wet paper sheets, while avoiding hard contact that could scratch the wire mesh surface of the cylindrical wire cage 5 and preventing mechanical damage to the wet paper sheets.

[0062] To facilitate the continued movement of the wet paper sheet, which has been moved to the top of the peeling plate 9, towards the wire mesh 6, the following features are specifically provided:

[0063] like Figure 2 , Figure 5 and Figure 8 As shown, a lifting roller 22 is rotatably connected to one end of the rubber cone plate 21 near the long net 6, and an auxiliary roller 23 that is rotatably connected to the peeling plate 9 is provided on the side of the lifting roller 22 near the long net 6.

[0064] The pressing mechanism 31 also includes a secondary roller 33 which is rotatably disposed on the side close to the lifting roller 22 and the auxiliary roller 23. When the wet paper sheet moves to the lower end of the secondary roller 33, the upper end of the wet paper sheet abuts against the secondary roller 33, and the lower end abuts against the lifting roller 22 and the auxiliary roller 23 respectively.

[0065] After being peeled off by the rubber cone plate 21, the wet paper sheet is first supported by the lifting roller 22 and conveyed forward to prevent it from drooping and wrinkling due to its own weight. Then, it is smoothly transferred to the surface of the wire 6 by the support of the auxiliary roller 23. During this process, the auxiliary roller 33, together with the lifting roller 22 and the auxiliary roller 23, forms a three-point support structure. The auxiliary roller 33 rotates at a synchronous linear speed, forming a gentle contact limit on the upper surface of the wet paper sheet, so that the wet paper sheet always remains flat and smooth during the conveying process. At the same time, it avoids squeezing damage to the loose fiber structure of the wet paper sheet, ensuring that the wet paper sheet is smoothly conveyed to the wire 6.

[0066] To provide a detailed explanation of the internal structure of the stripping plate 9, the following features are specifically included:

[0067] like Figure 8 and Figure 9 As shown, the main air passage 10 is provided with branch air passages 11 at equal intervals on the side near the rubber cone plate 21. One end of the branch air passage 11 is connected to the main air passage 10, and the other end is connected to the stripping air passage 28.

[0068] A rubber plate 15 is provided at the lower end of the peeling plate 9. One end of the rubber plate 15 is fixedly connected to the peeling plate 9, and the other end is dynamically sealed against the rubber cone plate 21.

[0069] During operation, the compressed air in the main air duct 10 is evenly distributed to the corresponding peeling air duct 28 through multiple branch air ducts 11, so that the air pressure of the peeling air duct 28 along the entire axial length of the circular wire mesh cage 5 is uniform, ensuring uniform loosening effect across the entire width of the wet paper sheet and avoiding incomplete peeling in certain areas. The rubber plate 15 forms a dynamic sealing structure between the peeling plate 9 and the rubber cone plate 21, which does not affect the elastic floating adjustment of the rubber cone plate 21, and can also seal the connection between the branch air ducts 11 and the peeling air duct 28, preventing compressed air leakage, ensuring stable air pressure at the outlet of the peeling air duct 28, and preventing external water and fiber impurities from entering the air duct, thus avoiding air duct blockage.

[0070] In order to replenish a small amount of water to the wet paper sheet between the main roll 32 and the auxiliary roll 33, the following features are specifically designed:

[0071] like Figure 5 and Figure 8 As shown, atomizing nozzles 34 are arranged in an equally spaced array on the side of the main roller 32 and the auxiliary roller 33 that are close to each other. The atomizing nozzles 34 are connected to the water source through water pipes.

[0072] The upper end of the rubber cone plate 21 is provided with equally spaced water leakage holes 18, which are located directly below the atomizing nozzle 34. Two water-blocking arc strips 17 are provided on both sides of the water leakage holes 18. One water-blocking arc strip 17 is fixedly connected to the upper end of the rubber cone plate 21, and the other water-blocking arc strip 17 is fixedly connected to the upper end of the peeling plate 9.

[0073] The upper end of the rubber plate 15 is provided with a water-proof arc plate 20 fixedly connected to the peeling plate 9. The lower end of the bearing seat 26 is slidably connected to the water-proof arc plate 20. The middle part of the bearing seat 26 is provided with a clearance hole 27 for airflow. The upper end of the water-proof arc plate 20 is provided with a corrugated pipe 19. The upper end of the corrugated pipe 19 is fixedly connected to the water leakage hole 18, and the lower end is connected to the cavity formed by the water-proof arc plate 20 and the rubber plate 15. The lower end of the rubber plate 15 is provided with a water leakage hole 18 for water to pass through. The water sprayed from the atomizing nozzle 34 passes through the water leakage hole 18, the corrugated pipe 19 and the leakage hole 16 in sequence to flush the outer wall of the circular mesh cage 5.

[0074] During operation, the atomizing nozzle 34 evenly sprays atomized water droplets onto the surface of the wet paper sheet between the main roller 32 and the auxiliary roller 33, providing a small amount of water to the wet paper sheet, maintaining the wet bonding force between fibers, improving the continuity of paper sheet conveying, preventing traction breakage, and making the wet paper sheet move more smoothly throughout the transfer and conveying process. The two water-blocking arc strips 17 converge the water flow during this process. Then, the excess water sprayed by the atomizing nozzle 34 is collected downward through the drain hole 18 and guided through the corrugated pipe 19 to the cavity formed by the water-blocking arc plate 20 and the rubber plate 15. Finally, it is evenly washed onto the outer wall of the circular wire mesh cage 5 through the drain hole 16 at the lower end of the rubber cone plate 21, performing a secondary rinsing on the wire mesh surface of the stripped circular wire mesh cage 5, thoroughly removing the residual trace fibers and impurities in the mesh, ensuring that the wire mesh surface is consistent when the next round of the circular wire mesh cage 5 is formed. At the same time, the excess water is quickly discharged through the drain hole 18, which can prevent the accumulation of water at the lower end of the wet paper sheet and avoid causing excessive resistance to the movement of the wet paper sheet.

[0075] In order to suspend and lift the wet paper sheet at the upper end of the lifting roller 22 and the auxiliary roller 23 so that the upper end of the wet paper sheet can abut against the rotating auxiliary roller 33, the following features are specifically provided:

[0076] like Figure 9 As shown, each branch airway 11 has a lifting airway 12 in the middle. The lifting airway 12 is located on the side of the lifting roller 22 near the auxiliary roller 23. The upper end of the lifting airway 12 is coaxially connected to the air plate 13. The upper end of the air plate 13 has air holes 14 arranged at equal angles along the circumferential direction.

[0077] Part of the compressed air in the branch air duct 11 is diverted to the air plate 13 through the lifting air duct 12, and then evenly sprayed upward through multiple sets of air holes 14 at the upper end of the air plate 13. This forms an upward uniform air cushion layer in the area between the lifting roller 22 and the auxiliary roller 23, which forms a non-contact suspension and lifting effect on the wet paper sheet passing through this area. This allows the upper surface of the wet paper sheet to form a uniform and gentle fit with the auxiliary roller 33, avoiding the problem of slippage caused by the wet paper sheet sagging due to its own drooping. At the same time, there is no hard contact throughout the process, so the loose fiber structure of the wet paper sheet will not be damaged, ensuring the flatness of the wet paper sheet during transport.

[0078] To perform preliminary dehydration on the wet paper sheet that has moved to the top of the wire mesh 6, the following features are specifically included:

[0079] like Figure 9 As shown, a secondary roller 35 is rotatably arranged above the peeling plate 9 near one end of the wire 6. When the wet paper sheet moves to the upper end of the peeling channel 29, the secondary roller 35 applies a downward pressing force to the wet paper sheet during the rotation process.

[0080] Each stripping channel 29 has a water distribution plate 30 at its upper end. The water distribution plate 30 has grid holes arranged at equal intervals along its long side to allow water to pass through.

[0081] During operation, when the wet paper sheet is conveyed to the upper end of the peeling channel 29, the secondary roller 35 rotates at a synchronous linear speed, applying a gentle downward pressing force to the wet paper sheet, so that the wet paper sheet is tightly attached to the surface of the wire 6, preventing the wet paper sheet from drifting or deviating during the conveying of the wire 6. The peeling channel 29 serves as a guide channel, quickly collecting and guiding the water squeezed out by the secondary roller 35. The water separator 30 and the grid holes are used to prevent fibers from entering the channel, avoiding blockage and ensuring smooth drainage.

[0082] To further dehydrate the wet paper sheet at the top of the long wire 6, the following features were specifically designed:

[0083] like Figure 1 and Figure 2 As shown, vacuum dehydration boxes 36 are arranged in an evenly spaced array at the upper end of the long wire 6. During operation, when the wet paper sheet is conveyed to the corresponding position of the vacuum dehydration box 36 along with the long wire 6, the vacuum dehydration box 36 applies a uniform and gentle negative pressure adsorption force to the wet paper sheet through the mesh of the long wire 6 (in order to prevent the wet paper sheet from being adsorbed upward, the vacuum dehydration box 36 can be set at the lower end of the long wire 6, or guide rollers are arranged in an array at the upper end of the long wire 6 to limit the upward movement of the wet paper sheet), gradually removing the free water in the wet paper sheet, so that the moisture content of the wet paper sheet gradually decreases, the binding force between fibers gradually increases, and the wet strength continuously increases, laying the foundation for the subsequent drying and winding processes. At the same time, the vacuum dehydration box 36 adopts a low vacuum design, only removing free water, without compressing the loose and porous structure inside the wet paper sheet, thus fully preserving the unique bulk and ink absorption properties of Xuan paper.

[0084] The detailed working principle of this device is as follows:

[0085] During operation, the pulp mixing tank 1 thoroughly mixes the *Pterocarya stenoptera* bark pulp and *Satay rice straw* pulp. After being stabilized by the concave flow stabilizer baffle 3, the mixture is sent to the headbox 2. The stirring mechanism 4 and the flow stabilizer baffle 3 work together in the headbox 2 to maintain the pulp in a low-concentration, uniformly dispersed state, preventing fiber flocculation and stratification. The cylindrical wire mesh 5 rotates at a low speed, with its lower part continuously immersed in the pulp. The fibers naturally adhere and interweave on the wire mesh surface, forming a loose, uniform, and porous wet paper sheet, completely replicating the fiber structure of hand-made paper, laying a quality foundation for subsequent processes.

[0086] As the wet paper sheet rotates with the cylindrical wire cage 5 to the transfer bonding area, the air compressor 37 outputs airflow through the main air duct 10 and branch air duct 11 into the peeling air duct 28, which is evenly sprayed out to form an air film, gently loosening the wet paper sheet from the wire mesh surface of the cylindrical wire cage 5. The rubber cone plate 21, under the action of the spring 25, always elastically adheres to the wire mesh surface, ensuring airflow sealing and preventing damage to the wire mesh and paper sheet. Simultaneously, the lifting air duct 12 and air plate 13 blow air upwards to form a suspension and lift, allowing the wet paper sheet to smoothly enter the area of ​​the lifting roller 22 and auxiliary roller 23. The main roller 32 and auxiliary roller 33 rotate synchronously to pull the paper sheet, and the atomizing nozzle 34 replenishes a small amount of water to keep the paper sheet flexible. Excess water is guided through the drain hole 18 and the corrugated pipe 19 to flush the cylindrical wire cage 5, achieving automatic cleaning of the wire mesh surface. The secondary roller 35 gently squeezes the wet paper sheet to remove surface free water. The squeezed water is collected and drained by the peeling channel 29, while the water separating plate 30 and the grid holes block the fibers and prevent the channel from becoming blocked.

[0087] After peeling and initial dehydration, the wet paper sheet is smoothly bonded to the surface of the wire mesh 6 under the pressure of the secondary roller 35. The wire mesh 6 is driven by the circular conveyor chain 7, maintaining speed synchronization with the cylindrical wire cage 5 to prevent the paper sheet from stretching and deforming. Subsequently, the wet paper sheet enters the multiple vacuum dehydration chambers 36 along with the wire mesh 6, where it undergoes gentle dehydration in stages under low vacuum. This process increases the wet strength without damaging the loose and porous structure of the paper sheet, resulting in a stable, flat, and wrinkle-free paper sheet that can smoothly proceed to subsequent drying and winding processes. The entire machine achieves continuous and standardized production of Xuan paper through the synergistic effect of multiple structures, including airflow peeling, elastic bonding, suspension lifting, drainage, and synchronous conveying. It also fully preserves the bulk, ink absorption, and ink-wetting effect of traditional Xuan paper, fundamentally solving the industry problems of inefficiency in manual production and damage to the paper structure caused by general paper machines.

[0088] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A specialized modern papermaking machine for producing synthetic polymer-free Xuan paper, characterized in that, include: A mixing tank (1) and a headbox (2) are arranged side by side. The mixing tank (1) and the headbox (2) are connected. A circular wire mesh cage (5) with its lower part immersed in the slurry inside the headbox (2) is rotatably installed inside the headbox (2). An air compressor (37) is installed on the side of the mixing tank (1). A closed-loop long wire (6) is provided on the side of the round wire cage (5) near the pulp mixing tank (1). The long wire (6) is tangent to the outer wall of the round wire cage (5) to form a transfer bonding area. The transfer bonding area is provided with a peeling mechanism (8) that transfers the wet paper sheet at the outer wall of the round wire cage (5) to the upper end of the long wire (6). The peeling mechanism (8) includes a peeling plate (9) with a main air passage (10) in the middle. The main air passage (10) is connected to the output end of the air compressor (37). One end of the peeling plate (9) is elastically provided with a rubber cone plate (21) that abuts against the outer wall of the round mesh cage (5). The upper end of the rubber cone plate (21) is provided with a peeling air passage (28) that communicates with the main air passage (10). The other end of the peeling plate (9) is flush with the upper end of the long net (6) and is provided with a peeling water passage (29). The upper end of the peeling plate (9) is provided with a flat roller pressing mechanism (31) for preliminary dewatering of the wet paper sheet.

2. The specialized modern papermaking machine for producing synthetic polymer-free Xuan paper according to claim 1, characterized in that, Two flow stabilizing baffles (3) are symmetrically arranged at the bottom of the mixing tank (1) and the headbox (2), and the side of the two flow stabilizing baffles (3) that are close to each other is concave. The headbox (2) is equipped with a stirring mechanism (4) that rotates inside to stir the slurry.

3. A specialized modern papermaking machine for producing polymer-free Xuan paper according to claim 1, characterized in that, A ring conveyor chain (7) is provided on the side of the round wire mesh cage (5). The two sides of the long wire mesh (6) are fixedly connected to the ring conveyor chain (7). The ring conveyor chain (7) drives the long wire mesh (6) to run in a closed loop.

4. A specialized modern papermaking machine for producing synthetic polymer-free Xuan paper according to claim 1, characterized in that, The pressing mechanism (31) includes a main roller (32) that is rotatably disposed above the rubber cone plate (21). When the main roller (32) rotates, it drives the wet paper sheet that has been peeled off by the rubber cone plate (21) to move toward the wire mesh (6). A bearing seat (26) is fixedly connected to the lower end of the rubber cone plate (21). Two guide shafts (24) are fixedly connected to the side of the bearing seat (26) near the peeling plate (9). The guide shafts (24) are slidably connected to the peeling plate (9). A spring (25) is sleeved on the outside of the guide shafts (24). One end of the spring (25) is fixedly connected to the bearing seat (26), and the other end is fixedly connected to the peeling plate (9).

5. A specialized modern papermaking machine for producing non-synthetic polymer Xuan paper according to claim 4, characterized in that, The rubber cone plate (21) is rotatably connected to a lifting roller (22) at one end near the long net (6), and an auxiliary roller (23) is rotatably connected to the peeling plate (9) on the side of the lifting roller (22) near the long net (6). The pressing mechanism (31) also includes a secondary roller (33) which is rotatably disposed on the side close to the lifting roller (22) and the auxiliary roller (23). When the wet paper moves to the lower end of the secondary roller (33), the upper end of the wet paper abuts against the secondary roller (33), and the lower end abuts against the lifting roller (22) and the auxiliary roller (23) respectively.

6. A specialized modern papermaking machine for producing non-synthetic polymer Xuan paper according to claim 5, characterized in that, The main airway (10) is provided with branch airways (11) at equal intervals on the side near the rubber cone plate (21). One end of the branch airway (11) is connected to the main airway (10), and the other end is connected to the stripping airway (28). A rubber plate (15) is provided at the lower end of the peeling plate (9). One end of the rubber plate (15) is fixedly connected to the peeling plate (9), and the other end is dynamically sealed against the rubber cone plate (21).

7. A specialized modern papermaking machine for producing non-synthetic polymer Xuan paper according to claim 6, characterized in that, Atomizing nozzles (34) are arranged in an equally spaced array on the side of the main roller (32) and the auxiliary roller (33), and the atomizing nozzles (34) are connected to the water source through water pipes; The upper end of the rubber cone plate (21) is provided with equally spaced water leakage holes (18), which are located directly below the atomizing nozzle (34). Two water-blocking arc strips (17) are provided on both sides of the water leakage holes (18). One water-blocking arc strip (17) is fixedly connected to the upper end of the rubber cone plate (21), and the other water-blocking arc strip (17) is fixedly connected to the upper end of the peeling plate (9). The upper end of the rubber plate (15) is provided with a water-proof arc plate (20) fixedly connected to the peeling plate (9). The lower end of the bearing seat (26) is slidably connected to the water-proof arc plate (20). The middle part of the bearing seat (26) is provided with a clearance hole (27) for airflow. The upper end of the water-proof arc plate (20) is provided with a corrugated pipe (19). The upper end of the corrugated pipe (19) is fixedly connected to the water leakage hole (18), and the lower end is connected to the cavity formed by the water-proof arc plate (20) and the rubber plate (15). The lower end of the rubber plate (15) is provided with a water leakage hole (18) for water to pass through. The water sprayed from the atomizing nozzle (34) passes through the water leakage hole (18), corrugated pipe (19) and leakage hole (16) in sequence to flush the outer wall of the circular mesh cage (5).

8. A specialized modern papermaking machine for producing non-synthetic polymer Xuan paper according to claim 5, characterized in that, Each branch airway (11) has a lifting airway (12) in the middle. The lifting airway (12) is located on the side of the lifting roller (22) near the auxiliary roller (23). The upper end of the lifting airway (12) is coaxially connected to the air plate (13). The upper end of the air plate (13) has air holes (14) arranged in an equal angle along the circumferential direction.

9. A specialized modern papermaking machine for producing polymer-free Xuan paper according to claim 1, characterized in that, A secondary roller (35) is rotatably installed above the peeling plate (9) near the end of the wire mesh (6). When the wet paper sheet moves to the upper end of the peeling channel (29), the secondary roller (35) applies a downward pressing force to the wet paper sheet during the rotation process. Each stripping channel (29) has a water distribution plate (30) at its upper end. The water distribution plate (30) has a grid hole that allows water to pass through, arranged at equal intervals along its long side.

10. A specialized modern papermaking machine for producing non-synthetic polymer Xuan paper according to claim 9, characterized in that, Vacuum dehydration tanks (36) are arranged in an equally spaced array at the upper end of the long net (6).

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