A device for gluing wood pulp grid paper on an online laying machine

Abstract

The application discloses a device for online sizing of wood pulp mesh paper, comprising an online paving anti-yarn disorder device arranged before a sparse mesh cloth sizing device; the online paving anti-yarn disorder device comprises an upper layer of warp groups, a middle layer of weft groups and a lower layer of warp groups, and warp separating rollers arranged on the moving paths of the upper layer of warp groups and the lower layer of warp groups; the warp separating rollers comprise upper layer warp separating rollers in contact with the warps in the upper layer of warp groups and lower layer warp separating rollers in contact with the warps in the lower layer of warp groups, and a plurality of annular separating grooves are distributed on the outer circles of the warp separating rollers; a synchronous airflow generator is arranged on the path of the middle layer of weft groups entering the sparse mesh cloth sizing device, and is used for forming a moving airflow around the middle layer of weft groups, and the moving speed of the moving airflow is the same as or close to the moving speed of the middle layer of weft groups. The application improves the production quality of wood pulp mesh paper.

Description

[0001] This application is a divisional application of Chinese invention patent application filed on June 7, 2024, with application number 202410732565.2 and invention title: An online gluing process system and method for wood pulp grid paper. Technical Field

[0002] This invention relates to the field of wood pulp grid paper production and manufacturing technology, specifically to an online lamination and gluing process system and method for wood pulp grid paper, and also to an apparatus for online lamination and gluing of wood pulp grid paper. Background Technology

[0003] Wood pulp mesh paper is a commonly used industrial cleaning product for absorbing liquids, removing stains, and wiping surfaces. A typical wood pulp mesh paper has a three-layer composite structure: the middle layer is a loosely woven mesh material made of fibrous material (also known as loosely woven fabric), and the bottom and top layers are made of wood pulp raw material paper, which is composited through a special process.

[0004] Wood pulp grid paper has a wide range of applications and uses. It can be used in industrial fields such as machining, automobile manufacturing, electronics production, and aerospace. It is commonly used for automobile maintenance and repair, as well as for cleaning instruments and meters in hospitals, laboratories, and other places.

[0005] Wood pulp mesh paper, through bidirectional shrinkage, can form a specific wrinkled foam effect, enhancing its flexibility, comfort, high absorbency, and tensile properties. This results in high strength, strong absorbency, safety, environmental friendliness, non-toxicity, and lint-free characteristics. It can replace currently used cleaning cloths, maintaining the safety of the production environment, products, and personnel. Furthermore, based on the excellent water absorption, chemical resistance, tensile strength, antistatic properties, tear resistance, lint-free properties, and reusability of wood pulp mesh paper, it serves as an important cleaning material for industrial applications, significantly improving cleaning efficiency and quality.

[0006] In existing technologies, the preparation of wood pulp mesh paper employs a two-step forming process, separating the preparation of the loose mesh fabric from the lamination of the loose mesh fabric with the raw material paper: the first step involves producing the loose mesh fabric using a dedicated loose mesh fabric production line (or purchasing the loose mesh fabric directly); the second step involves laminating the loose mesh fabric with the raw material paper using a dedicated lamination production line. However, due to the limited number of domestic manufacturers capable of producing high-quality loose mesh fabric, high-end applications (such as medical paper for surgical procedures) necessitate the import of finished loose mesh fabric meeting stringent quality requirements, resulting in high production costs for high-grade wood pulp mesh paper. Therefore, our company has specifically developed a wood pulp mesh paper production equipment that eliminates the need for finished loose mesh fabric. The equipment uses an online web-laying technology for loose mesh material layers. The loose mesh material layer is formed by online web-laying of yarn weft and warp, and a specially designed counter-pressure composite roller is used to press and composite the upper and lower layers of raw paper and the loose mesh material layer in the middle layer coated with glue. After drying, it forms wood pulp mesh paper.

[0007] The above-mentioned wood pulp grid paper production process involves a process of applying glue to the loosely laid mesh fabric. This glue application process requires applying water-based glue to the loosely laid mesh fabric, and then stacking it with the upper and lower layers of raw material paper. After pressing and drying, wood pulp grid paper is produced.

[0008] However, due to the large spacing between the warp and weft threads in the loose mesh fabric, coupled with the poor moisture absorption of the yarn material itself which has heat-melting properties, if traditional gluing equipment is used for gluing, uneven excess glue will easily accumulate on the loose mesh fabric, resulting in unstable control of the glue film thickness and uneven glue application, which in turn leads to the problem of excessive thickness uniformity of the produced wood pulp mesh paper.

[0009] In the above-mentioned coating process of loose mesh fabric, a coating device with transfer roller, coating roller and pressure roller is used to apply glue to the loose mesh fabric. The specific coating process is as follows: the loose mesh fabric laid online is arranged between the pressure roller and coating roller set above and below. The water-based glue is transferred to the coating roller through the transfer roller which is partially immersed in the coating tank. The glue is evenly coated onto the loose mesh fabric laid online by the pressure between the pressure roller and the coating roller.

[0010] However, because water-based adhesives evaporate quickly when exposed to air, if the wood pulp grid paper production equipment is temporarily shut down for any reason, the moisture in the adhesive on the surface of the transfer rollers, coating rollers, and pressure rollers exposed to air in the coating device will evaporate rapidly within tens of seconds or even several seconds when restarted. This causes the adhesive to solidify on the roller surface, requiring specialized cleaning and maintenance by operators before production can resume. This increases the workload of equipment maintenance and reduces the efficiency of wood pulp grid paper production. In addition, due to differences in operator skills, manual cleaning may not completely remove the solidified adhesive, which will affect the quality of subsequent coating.

[0011] The aforementioned wood pulp grid paper production process also involves pressing and laminating two layers of raw paper and a loosely packed grid material coated with glue in the middle layer, followed by drying. Using a traditional drying oven for wood pulp grid paper drying has drawbacks such as long drying time and high energy consumption; furthermore, the long drying time can easily lead to a decline in the quality of the final wood pulp grid paper.

[0012] The aforementioned wood pulp grid paper production process also involves an online web-laying process for loose mesh fabric. This online web-laying process divides the yarn into three layers: upper, middle, and lower. The upper and lower layers are composed of a number of parallel and spaced warp yarns, respectively, while the middle layer is composed of a number of parallel and spaced weft yarns. After the three layers of yarn are laid out, they are fed together into the glue coating roller and the pressure roller of the glue coating device for glue application and lamination. The loose mesh fabric formed after glue application and lamination is then laminated with the upper and lower layers of raw paper. After drying, the wood pulp grid paper is produced.

[0013] When laying loosely woven mesh online, the yarns need to be under a certain tension. However, because the warp threads are relatively long and thin, the tension applied to the warp threads cannot be too high, which may result in some warp threads still having some slack. In addition, because the yarns moving at high speed are prone to static electricity, the warp threads with some slack can easily stick together during high-speed movement. Furthermore, although the weft threads are relatively short, the air in front of the weft threads during high-speed movement will have a certain airflow impact on the weft threads, which can easily cause the weft threads to bend in an arc, thus also affecting the quality of the web laying. Summary of the Invention

[0014] To address the aforementioned problems, this invention proposes an online lamination and gluing process system and method for wood pulp grid paper, aiming to improve the production quality of wood pulp grid paper. The specific technical solution is as follows: An online screen laying, gluing and laminating process system for wood pulp grid paper includes an online screen laying area, a gluing area and a laminating area arranged sequentially on a wood pulp grid paper production line according to the wood pulp grid paper production process flow; The online web-laying area is equipped with an online web-laying anti-yarn-disordering device to prevent yarn disorder during the online web-laying of loosely woven wood pulp mesh paper. The online web-laying anti-yarn-disordering device includes an upper warp group, a middle weft group, and a lower warp group for online web-laying to form a loosely woven mesh, and warp yarn separating rollers respectively arranged on the moving paths of the upper warp group and the lower warp group. The warp yarn separating rollers include an upper warp yarn separating roller that abuts against the warp yarns in the upper warp group and a lower warp yarn separating roller that abuts against the warp yarns in the lower warp group. A number of annular separating grooves are distributed at intervals on the outer circumference of the warp yarn separating rollers. The coating area is equipped with a loose mesh fabric coating device for coating the yarns in the upper warp group, middle weft group, and lower warp group that make up the loose mesh fabric. The loose mesh fabric coating device includes a coating roller, a pressure roller disposed above the coating roller, a coating pool disposed below the coating roller, a first transfer roller whose lower side is immersed in the coating pool, and a second transfer roller disposed between the coating roller and the first transfer roller and in contact with the coating roller and the first transfer roller respectively. The outer circumference of the coating roller is covered with a cylindrical moisture-absorbing film. The composite zone is equipped with a hot-pressing composite drying device for hot-pressing and drying two layers of raw material paper and a middle layer of loose mesh fabric together. The hot-pressing composite drying device includes a pair of composite rollers and a closed steam heating device located on one side of the wood pulp mesh paper discharge end of the pair of composite rollers. The closed steam heating device includes a closed steam box, a wood pulp mesh paper inlet slit and a wood pulp mesh paper outlet slit opened on the closed steam box along the movement path of the wood pulp mesh paper. The wood pulp mesh paper entering the closed steam box divides the internal space of the closed steam box into an upper steam chamber and a lower steam chamber. Steam supply pipes corresponding to and communicating with the upper steam chamber and the lower steam chamber of the closed steam box are respectively provided on the closed steam box.

[0015] In this invention, the upper warp yarn separating roller is positioned on a path before the upper warp yarn group enters the sparse mesh fabric coating device, and the lower warp yarn separating roller is positioned on a path before the lower warp yarn group enters the sparse mesh fabric coating device.

[0016] In the online web-laying anti-yarn disorder device of the present invention, a synchronous airflow generator is provided on the path of the middle layer weft yarn group entering the loose mesh fabric coating device to form a moving airflow around the middle layer weft yarn group, and the moving speed of the moving airflow is the same as or close to the moving speed of the middle layer weft yarn group; the synchronous airflow generator includes an upper air supply box and a lower air supply box arranged vertically, the upper air supply box is located above the middle layer weft yarn group, and the lower air supply box is located below the middle layer weft yarn group. The bottom end surface of the upper air supply box is densely provided with upper air supply holes that blow obliquely towards the middle layer weft yarn group in the moving direction, and the top end surface of the lower air supply box is densely provided with lower air supply holes that blow obliquely towards the middle layer weft yarn group in the moving direction; the upper air supply box and the lower air supply box are respectively connected to the air supply system.

[0017] Preferably, an anemometer is installed on the synchronous airflow generator at one end near the sparse mesh fabric coating device; the air supply system and the anemometer are respectively connected to the control system of the wood pulp mesh paper production line.

[0018] In this invention, the surfaces of the coating roller and the pressing roller of the loose mesh fabric coating device are both provided with a conductive coating layer, and the conductive coating of the coating roller and the pressing roller is externally connected to a low-voltage power supply; a pair of conductive rods are inserted into the coating pool, and a low-voltage power supply is externally connected between the pair of conductive rods; the transfer roller includes a first transfer roller whose lower side is immersed in the coating pool, and a second transfer roller disposed between the coating roller and the first transfer roller and in contact with the coating roller and the first transfer roller respectively, the surface of the second transfer roller is provided with a conductive coating layer, and the conductive coating of the second transfer roller is externally connected to a low-voltage power supply.

[0019] Preferably, in the loose mesh fabric coating device, the coating tank is further provided with a liquid level monitor for monitoring the liquid level of the adhesive in the coating tank. The liquid level monitor includes a bridge plate disposed on one side of the upper end of the coating tank and a liquid level gauge disposed on the bridge plate. The liquid level monitoring probe of the liquid level gauge points downward toward the coating tank. The liquid level gauge is connected to the control system of the wood pulp mesh paper production line. As a further improvement, the loose mesh fabric coating device of the present invention is also provided with a liquid level dynamic stabilizer for reducing the liquid level of the adhesive in the coating tank. The liquid level dynamic stabilizer includes a servo electric push rod fixed on the bridge plate and a fully enclosed volumetric floating box located at the lower end of the telescopic rod of the servo electric push rod and occupying a certain volume. The fully enclosed volumetric floating box is partially immersed in the coating tank. The servo electric push rod is connected to the control system of the wood pulp mesh paper production line.

[0020] Preferably, in the hot-press composite drying device, a pair of outlet guide rollers arranged vertically near the outlet slit of the wood pulp grid paper are provided on the closed steam box to guide the movement direction of the wood pulp grid paper. The wood pulp grid paper exits from the outlet slit and is then drawn out between the pair of outlet guide rollers. A rubber plate is provided on the outer wall of the closed steam box near the outlet slit of the wood pulp grid paper, and the pair of outlet guide rollers respectively abut against the rubber plate. An open steam heating device is also provided on the side of the wood pulp grid paper discharge end of the pair of outlet guide rollers. The open steam heating device includes a pair of steam heating boxes arranged vertically. The wood pulp grid paper is drawn out between the pair of outlet guide rollers and enters between the pair of steam heating boxes. The side of the pair of steam heating boxes facing the wood pulp grid paper is densely provided with steam injection holes, and the internal steam chambers of the pair of steam heating boxes are respectively connected to steam supply pipes.

[0021] As a further improvement, the loose mesh fabric coating device of the present invention is also provided with a temporary shutdown maintenance structure. The temporary shutdown maintenance structure includes a pressure roller mounted above the coating roller via a lifting mechanism, a drive wheel mounted on one side above the pressure roller for contacting the pressure roller after it moves up, an air knife mounted parallel to the pressure roller for approaching the pressure roller after it moves up, an ultrasonic water mist nozzle mounted inside the air knife, and an ultrasonic water mist generator connected to the ultrasonic water mist nozzle. The air outlet of the air knife faces the roller surface of the pressure roller.

[0022] In this invention, an upper warp unwinding device and a lower warp unwinding device are respectively provided behind the upper warp group and the lower warp group. After the warp yarns released from the upper warp unwinding device and the lower warp unwinding device reach the online web laying area, they are guided and separated by the warp yarn separating roller to form the upper warp group and the lower warp group respectively in the online web laying area.

[0023] In this invention, a weft yarn laying device is also provided. The weft yarn laying device includes a pair of synchronous transmission belt mechanisms arranged separately according to their front and rear positions. Each synchronous transmission belt mechanism includes a pair of synchronous transmission wheels arranged in the left and right direction and a synchronous transmission narrow belt connected between the pair of synchronous transmission wheels. The synchronous transmission narrow belt has elastic hooks for fixing the weft yarns evenly arranged at intervals according to the spacing of the weft yarns. A weft yarn laying shuttle robot is also provided above the pair of synchronous transmission belt mechanisms. The weft yarn laying shuttle robot is connected to the middle layer weft yarn unwinding device. A group of weft yarns released from the middle layer weft yarn unwinding device is fixed between the elastic hooks located on the front and rear synchronous transmission narrow belts by the weft yarn laying shuttle robot, thereby forming the middle layer weft yarn group.

[0024] In order to achieve continuous online web laying of loose mesh fabric and continuous lamination of the loose mesh fabric with the upper and lower raw material paper after gluing, the loose mesh fabric gluing device and the hot-pressing lamination and drying device are arranged between the pair of synchronous transmission belt mechanisms arranged in the front-to-back direction and between the pair of synchronous transmission wheels in the left-to-right direction, and a weft separation cutter is provided at the synchronous wheel located in front of the pair of synchronous transmission wheels. The loosely woven mesh fabric, laid online, enters the loosely woven mesh fabric coating device for coating. After coating, the loosely woven mesh fabric is combined with the upper and lower raw material paper and then enters the hot-pressing composite drying device for hot-pressing composite drying to form wood pulp mesh paper. When the wood pulp mesh paper coming out of the hot-pressing composite drying device moves forward to the synchronous drive wheel, the terminals at both ends of the weft yarn connected to the elastic hook are broken by the weft yarn separation cutter located at the synchronous drive wheel, so that the weft yarn is separated from the synchronous drive narrow belt. This allows the middle layer weft yarn group, which has been laminated between the upper and lower raw material paper, to continue to move forward, facilitating the continuous winding of the subsequent wood pulp mesh paper.

[0025] This invention provides a certain tension to the weft yarn by setting elastic hooks on the narrow belt of the synchronous drive. However, to avoid breaking the thinner weft yarns, the weft yarn tension should be set relatively low. Considering the impact of airflow, the high-speed moving weft yarn with a lower tension may bend before entering the synchronous airflow generator. However, after entering the synchronous airflow generator, due to the reduction or elimination of airflow impact, the weft yarn will return to a straight state under the elastic tension of the elastic hooks. This ensures that the yarn mesh of the loosely laid mesh fabric has a relatively regular rectangular mesh when compounded.

[0026] An online lamination and gluing process for wood pulp grid paper includes the following steps: (1) Online web laying; The yarns in the upper warp group, middle weft group and lower warp group in the online web laying area move forward and enter between the coating roller and the pressing roller of the sparse mesh fabric coating device in the coating area, so that the upper warp group, middle weft group and lower warp group are laid up in the upper, middle and lower positions to complete the online web laying operation; (2) Gluing: The sparse mesh fabric gluing device located in the gluing area transfers the water-based glue in the gluing pool to the gluing roller through the transfer roller. The water-based glue transferred to the gluing roller comes into contact with the yarn of the sparse mesh fabric that enters between the gluing roller and the pressure roller, thereby applying the water-based glue to the yarn in the upper warp group, the middle weft group and the lower warp group, and completing the gluing operation. After gluing, under the action of mutual pressure and heating of the hot pressure roller and the gluing roller, the yarn in the upper warp group, the middle weft group and the lower warp group are heat-melted and bonded at the intersection of the warp and weft to form a sparse mesh fabric with water-based glue on the surface. (3) Composite: The loose mesh cloth that comes out of the sparse mesh cloth coating device continues to move forward and enters the hot-press composite drying device together with the upper raw material paper above it and the lower raw material paper below it. The wood pulp mesh paper is formed by hot-melt bonding. (4) Drying: The wood pulp grid paper that comes out between a pair of hot composite pressure rollers enters a closed steam heating device for high-temperature steam heating. After the wood pulp grid paper comes out of the closed steam heating device, its moisture evaporates rapidly at high temperature, thus achieving the first drying of the wood pulp grid paper. Then the wood pulp grid paper enters an open steam heating device for high-temperature steam heating, thus achieving the second drying of the wood pulp grid paper. After that, it is dried at room temperature and then wound up.

[0027] The above-mentioned secondary high-temperature steam heating and drying not only improves the drying effect, but also enhances the wrinkling effect of the wood pulp grid paper, thereby improving the manufacturing quality of the wood pulp grid paper.

[0028] Preferably, the ambient temperature ventilation drying of the wood pulp grid paper is carried out in an open paper storage area. The ventilation speed is accelerated by the transverse cross-flow air generators set at the front and rear positions of the open paper storage area, thereby further improving the drying effect of the wood pulp grid paper.

[0029] As a further improvement to the online lamination and gluing process of the wood pulp grid paper of the present invention, during the online lamination and gluing process, a low-voltage power supply is turned on for static electricity elimination to prevent the sand threads from sticking together; a synchronous airflow generator is also turned on so that the airflow speed around the middle layer weft group is consistent with or close to the movement speed of the middle layer weft group, thereby eliminating or reducing the airflow impact on the weft threads in the middle layer weft group during high-speed movement, and thus eliminating or reducing the bending deformation of the weft threads; when the wood pulp grid paper production line is temporarily stopped, the pressure roller is moved upward by the lifting mechanism to disengage from the coating roller, keeping the transfer roller and coating roller of the loose mesh fabric coating device rotating. At the same time, the temporary stop maintenance structure on the loose mesh fabric coating device is activated to perform ultrasonic water mist humidification on the pressure roller after it is moved upward, thereby ensuring that the surface of the transfer roller and coating roller is moistened with glue during the temporary stop state, and the surface of the pressure roller can maintain a certain humidity, thereby ensuring that no special cleaning and maintenance is required for the transfer roller, coating roller and pressure roller after the stop, so that production can resume immediately after the stop.

[0030] The beneficial effects of this invention are: First, the present invention provides an online lamination and gluing process system and method for wood pulp grid paper. A specially designed sparse mesh gluing device has a cylindrical moisture-absorbing film wrapped around the outer circumference of the gluing roller, giving the roller good glue absorption and release capabilities. This allows for compensation of glue thickness at localized areas with thinner or thicker gluing when the sparse mesh gluing is uneven, thereby improving the uniformity of the glue thickness on the sparse mesh. This facilitates stable control of the glue thickness on the sparse mesh during online lamination, ultimately improving the production quality of the wood pulp grid paper.

[0031] Secondly, the online lamination and gluing composite process system and method for wood pulp grid paper of the present invention features a specially designed sparse mesh gluing device equipped with a liquid level dynamic stabilizer, which can dynamically maintain a constant liquid level in the gluing tank during the gluing process. This effectively reduces the fluctuation of the amount of glue on the roller surface caused by changes in liquid level when the first transfer roller rotates, thereby further improving the stability and reliability of the entire gluing system, and further improving the uniformity of gluing of the sparse mesh and the production quality of the wood pulp grid paper.

[0032] Third, the online lamination and gluing process system and method for wood pulp grid paper of the present invention, by setting the pressure roller in the sparse mesh fabric gluing device on the lifting mechanism and setting an ultrasonic water mist humidification device next to the pressure roller, ensures that the surface of the pressure roller remains moist and does not dry out when the pressure roller and the coating roller are separated in the state of temporary shutdown. This facilitates the immediate restart of the sparse mesh fabric gluing device after temporary shutdown, greatly reduces the maintenance workload of the sparse mesh fabric gluing device, improves the efficiency of wood pulp grid paper production, and ensures the production quality of wood pulp grid paper.

[0033] Fourth, the online lamination and gluing process system and method for wood pulp grid paper of the present invention adopts a humidification method with a combination of air knife and ultrasonic water mist nozzle, which improves the humidification effect.

[0034] Fifth, the online lamination and gluing process system and method for wood pulp grid paper of the present invention includes a closed-loop steam heating device and an open-loop steam heating device. These devices achieve high-temperature heating of the wood pulp grid paper after lamination. The wood pulp grid paper, exposed to air after receiving high-temperature heat, can rapidly evaporate its internal moisture, achieving a rapid drying effect. Furthermore, the concentrated heating with high-temperature steam has high energy utilization efficiency, effectively reducing energy consumption. Moreover, the short high-temperature steam heating time does not damage the wood pulp grid paper, thereby improving the manufacturing quality. In addition, the closed-loop steam heating device, being adjacent to the lamination roller, also heats the lamination roller, further enhancing the lamination effect of the wood pulp grid paper.

[0035] Fifth, the online lamination and gluing composite process system and method for wood pulp grid paper of the present invention utilizes the synergistic effect of a closed steam heating device and an open steam heating device. On the one hand, it can further improve the moisture dissipation rate inside the wood pulp grid paper, thereby improving the drying effect of the wood pulp grid paper. On the other hand, it can enhance the wrinkling effect of the wood pulp grid paper, thereby improving the manufacturing quality of the wood pulp grid paper.

[0036] Sixth, the present invention provides an online web-laying and gluing composite process system and method for wood pulp grid paper. An online web-laying anti-yarn disorder device is installed in the online web-laying area. Before entering the sparse mesh fabric gluing device, the yarns in the upper and lower warp groups are guided by the upper and lower warp yarn separating rollers, respectively, separating adjacent warp yarns. This eliminates or greatly reduces warp yarn adhesion caused by static electricity, thereby improving the online web-laying quality of the sparse mesh fabric for wood pulp grid paper, and consequently improving the manufacturing quality of the wood pulp grid paper.

[0037] Seventh, the present invention provides an online web-laying and gluing composite process system and method for wood pulp mesh paper. The surfaces of the coating roller, pressing roller, second transfer roller, and warp yarn separating roller of the online web-laying anti-yarn disorder device are all provided with conductive coatings. Conductive rods are provided in the coating tank. Each of the conductive coatings and conductive rods is subjected to electrical treatment, thereby eliminating or significantly reducing static electricity when the yarn moves at high speed, thus effectively preventing the yarns from sticking together, thereby further improving the online web-laying quality of the loose mesh fabric of wood pulp mesh paper.

[0038] Eighth, in the online web-laying and gluing composite process system and method for wood pulp grid paper of the present invention, in the online web-laying anti-yarn disorder device, a synchronous airflow generator is arranged around the middle layer weft yarn group. The resultant force of the oblique airflow blown out by the upper air supply box and the lower air supply box can form a moving airflow around the middle layer weft yarn group that is consistent with (same direction, same magnitude) or close to (same direction, similar magnitude) the moving speed of the middle layer weft yarn group. This effectively avoids the impact of airflow on the weft yarns in the middle layer weft yarn group during high-speed movement, thereby greatly reducing the bending deformation of the weft yarns, and further improving the online web-laying quality of the loose mesh fabric of wood pulp grid paper.

[0039] Ninth, the present invention provides an online web-laying and gluing composite process system and method for wood pulp grid paper. In the online web-laying anti-yarn disorder device, the warp yarn separating roller, the anti-static power connection device, and the synchronous airflow generator work together to make the grid formed by the laying of warp and weft yarns into a rectangular grid with a relatively regular shape and uniform size. This overcomes the drawbacks of traditional wood pulp grid paper production using loosely laid finished fabric, which easily leads to grid deformation and inconsistent grid shapes and sizes.

[0040] Tenth, the present invention provides an online web-laying and gluing composite process system and method for wood pulp grid paper. The weft web-laying device utilizes the cyclic motion of the synchronous transmission narrow belt on the synchronous transmission belt mechanism and the coordinated operation of the weft web-laying shuttle manipulator and the weft separation and cutting blade to achieve continuous weft web-laying and improve the efficiency of online web-laying. Attached Figure Description

[0041] Figure 1 This is a schematic flowchart of an online lamination and gluing composite process system and method for wood pulp grid paper according to the present invention; Figure 2 This is a flowchart of the online lamination and gluing process for a wood pulp grid paper production line; Figure 3 yes Figure 1 A schematic diagram of the structure of the latitude-line web-laying and shuttle robot in China; Figure 4 yes Figure 1 A schematic diagram of the sparse mesh fabric adhesive coating device in the image; Figure 5Is Figure 1 One of the schematic diagrams of the temporary shutdown and maintenance structure set on the loose mesh fabric coating device in the middle (the wood pulp mesh paper production line is in operation). Figure 6 Is Figure 1 The second schematic diagram of the temporary shutdown maintenance structure set on the loose mesh fabric coating device (the wood pulp mesh paper production line is in a temporary shutdown state). Figure 7 yes Figure 1 A schematic diagram of the paper hot-pressing composite drying device in the middle; Figure 8 yes Figure 7 A magnified view of a portion of the document; Figure 9 yes Figure 7 A top view of the section involving the paper storage area; Figure 10 yes Figure 1 A schematic diagram of the online web-laying anti-yarn disorder device; Figure 11 yes Figure 10 A magnified view of a portion of the document; Figure 12 yes Figure 10 A schematic diagram of the structure of the warp separating rollers (upper warp separating roller and lower warp separating roller).

[0042] In the diagram: 100, Online web laying area; 110, Online web laying anti-yarn disorder device; 120, Weft web laying device; 121, Synchronous transmission belt mechanism; 122, Synchronous transmission wheel; 123, Synchronous transmission narrow belt; 124, Elastic hook; 125, Weft web laying shuttle robot; 126, Weft separation and cutting knife; 200, Glue coating area; 210, Loose mesh fabric glue coating device; 300, Composite area; 310, Hot press composite drying device; 311, Upper raw material paper; 312, Lower raw material paper; 313, Raw material paper guide roller. In the diagram: 1. Glue-applying roller, 2. Glue-pressing roller, 3. Glue-applying tank, 4. First transfer roller, 5. Second transfer roller, 6. Cylindrical moisture-absorbing film, 7. First servo frequency converter motor, 8. Second servo frequency converter motor, 9. Glue film thickness gauge, 10. Control system, 11. Rigid roller body, 12. Elastic rubber layer, 13. Lifting mechanism, 14. Frame, 15. Feeding pipe, 16. Loose mesh cloth laid online, 17. Liquid level monitor, 18. Bridge plate, 19. Liquid level gauge, 20. Liquid level dynamic stabilizer, 21. Servo electric push rod, 22. Fully enclosed volume flotation tank; In the diagram: 31. Drive wheel, 32. Air knife, 33. Ultrasonic water mist nozzle, 34. Ultrasonic water mist generator, 35. Guide column, 36. Lifting plate, 37. Lifting cylinder, 38. Support, 39. Drive wheel bracket, 40. Gearbox motor, 41. Air knife bracket, 42. V-shaped diffuser, 43. Water droplet collector, 44. Rotating arm, 45. Arc-shaped water droplet collection box, 46. Drain outlet, 47. Servo gearbox motor, 48. Drive gear, 49. Driven gear.

[0043] In the diagram: 51. Composite pressure roller; 52. Closed-loop steam heating device; 53. Closed-loop steam box; 54. Wood pulp grid paper inlet slit; 55. Wood pulp grid paper outlet slit; 56. Upper steam chamber; 57. Lower steam chamber; 58. Upper composite pressure roller; 59. Lower composite pressure roller; 60. Outlet guide roller; 61. Rubber plate; 62. Pressure roller stop tongue; 63. Guide roller stop tongue; 64. Strip sealing block; 65. Open-loop steam heating device; 66. Steam heating box; 67. Steam jet hole; 68. Internal steam chamber; 69. Paper storage area; 70. Rewinding device; 71. Front ventilation hood; 72. Rear ventilation hood; 73. Blower; 74. Exhaust fan; 75. Transverse cross-flow air generator; 76. Wood pulp grid paper.

[0044] In the diagram: 81. Upper warp group, 82. Middle weft group, 83. Lower warp group, 84. Upper warp yarn separating roller, 85. Lower warp yarn separating roller, 86. Annular yarn separating groove, 87. V-shaped, 88. Conductive rod, 89. Synchronous airflow generator, 90. Upper air supply box, 91. Lower air supply box, 92. Upper air supply hole, 93. Lower air supply hole, 94. Air supply system, 95. Anemometer, 96. Ambient temperature sensor. Detailed Implementation

[0045] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0046] Example 1: As Figures 1 to 12 The above is an embodiment of an online web-laying, gluing, and laminating process system and method for wood pulp grid paper, comprising an online web-laying area 100, a gluing area 200, and a laminating area 300 sequentially arranged on a wood pulp grid paper production line according to the wood pulp grid paper production process flow; The online web-laying area 100 is equipped with an online web-laying anti-yarn-disordering device 110 to prevent yarn disorder during the online web-laying of the loosely woven mesh fabric 76. The online web-laying anti-yarn-disordering device 110 includes an upper warp group 81, a middle weft group 82, and a lower warp group 83 for online web-laying to form the loosely woven mesh fabric 16, as well as warp yarn separating rollers (warp yarn separating roller 84 and warp yarn separating roller 85) respectively disposed on the moving paths of the upper warp group 81 and the lower warp group 83. The device includes an upper warp yarn separating roller 84 that contacts the warp yarns in the upper warp yarn group 81 and a lower warp yarn separating roller 85 that contacts the warp yarns in the lower warp yarn group 83. The upper warp yarn separating roller 84 is located on a path before the upper warp yarn group 81 enters the loose mesh fabric coating device 210, and the lower warp yarn separating roller 85 is located on a path before the lower warp yarn group 83 enters the loose mesh fabric coating device 210. A number of annular separating grooves 86 are distributed at intervals on the outer circumference of the warp yarn separating rollers (warp yarn separating roller 84 and warp yarn separating roller 85).

[0047] The upper meridian group 81 is composed of a number of upper meridians arranged at intervals, the middle latitude group 82 is composed of a number of middle latitudes arranged at intervals, and the lower meridian group 83 is composed of a number of lower meridians arranged at intervals.

[0048] In this embodiment, the loose mesh fabric 16 used for online web laying is laid under a certain tension for both its warp and weft threads.

[0049] During operation, the warp threads in the upper warp group 81 and the lower warp group 83 are respectively attached to the annular separating groove 86 of the corresponding warp separating rollers (warp separating roller 84, warp separating roller 85), thereby preventing the warp threads from becoming disordered and achieving the effect of separating the warp threads.

[0050] Preferably, the axial cross-sectional shape of the annular wire-splitting groove 86 is a V-shape 87.

[0051] Preferably, a conductive coating is provided on the surface of the warp separating rollers (warp separating roller 84, warp separating roller 85), and the conductive coating of the warp separating rollers (warp separating roller 84, warp separating roller 85) is connected to a low-voltage power supply.

[0052] The coating area 200 is equipped with a loose mesh fabric coating device 210 for coating the yarns in the upper warp group 81, the middle weft group 82, and the lower warp group 83 that make up the loose mesh fabric. The loose mesh fabric coating device 210 includes a coating roller 1, a pressure roller 2 disposed above the coating roller 1, a coating pool 3 disposed below the coating roller 1, a first transfer roller 4 whose lower side of the roller surface is immersed in the coating pool 3, and a second transfer roller 5 disposed between the coating roller 1 and the first transfer roller 4 and in contact with the coating roller 1 and the first transfer roller 4 respectively. The outer circumference of the coating roller 1 is covered with a cylindrical moisture-absorbing film 6. Preferably, the cylindrical moisture-absorbing film 6 is a seamless cylindrical knitted fabric or a cylindrical nonwoven fabric.

[0053] In this embodiment, the coating roller 1 is driven to rotate by the first servo frequency converter motor 7.

[0054] Preferably, the second transfer roller 5 is a rigid roller, and the second transfer roller 5 is driven to rotate by the second servo frequency converter motor 8. A film thickness gauge 9 for measuring the thickness of the film on the surface of the second transfer roller 5 is provided on one side of the second transfer roller 5. The first servo frequency converter motor 7, the second servo frequency converter motor 8 and the film thickness gauge 9 are respectively connected to the control system 10 of the wood pulp grid paper production line.

[0055] By using transfer rollers (first transfer roller 4 and second transfer roller 5) and the matching adhesive film thickness gauge 9, precise control of the adhesive coating thickness of the sparse mesh fabric can be achieved, thereby further improving the uniformity of adhesive coating on the sparse mesh fabric and the production quality of the wood pulp mesh paper 76.

[0056] In this embodiment, the pressure roller 2 is a rigid pressure roller, the coating roller 1 is a composite coating roller, the composite coating roller includes a rigid roller body 11 and an elastic rubber layer 12 disposed on the outer circle of the rigid roller body 11, and the cylindrical moisture-absorbing film 6 is wrapped around the outer circle of the elastic rubber layer 12.

[0057] In this embodiment, a lifting mechanism 13 is provided above the pressure roller 2, and the pressure roller 2 is mounted on the lifting mechanism 13 to realize the up and down movement of the pressure roller 2.

[0058] Preferably, the lifting mechanism 13 is connected to the control system 10 of the wood pulp grid paper production line.

[0059] In this embodiment, an improved structure of a loose mesh fabric gluing device for a wood pulp mesh paper production line is further provided with a frame 14. The upper part of the lifting mechanism 13 is fixed on the frame 14, and the gluing roller 1 and the second transfer roller 5 are respectively rotatably mounted on the frame 14.

[0060] In this embodiment, the first transfer roller 4 is rotatably mounted on the glue coating tank 3.

[0061] Preferably, the first transfer roller 4 is a brush roller.

[0062] Preferably, the glue coating tank 3 is provided with a feeding pipe 15, which is connected to a feeding pump (not shown in the figure).

[0063] During the adhesive application process, the control system 10 controls the pressure roller 2 to move downward via the lifting mechanism 13, pressing the loosely laid mesh fabric 16 onto the adhesive application roller 1. Then, the first servo frequency converter 7 and the second servo frequency converter 8 are activated, causing the adhesive application roller 1 and the second transfer roller 5 to rotate respectively. When the adhesive application roller 1 rotates, it drives the loosely laid mesh fabric 16 to move forward. When the second transfer roller 5 rotates, it drives the first transfer roller 4 to rotate synchronously. When the first transfer roller 4 rotates, it absorbs the water-based liquid adhesive in the adhesive pool 3 onto its own outer circumference. Then, through the rotational contact with the second transfer roller 5, it transfers the water-based liquid adhesive to the outer circumference of the second transfer roller 5. The second transfer roller 5 then transfers the water-based liquid adhesive on its outer circumference to the adhesive application roller 1. Under the pressure of the pressure roller 2 and the adhesive application roller 1, the adhesive is applied onto the loosely laid mesh fabric 16. As the loosely laid mesh fabric 16 moves forward, continuous application of the adhesive onto the loosely laid mesh fabric is achieved.

[0064] In order to control the amount of adhesive applied, the control system 10 dynamically monitors the thickness of the adhesive film on the second transfer roller 5 through the adhesive film thickness gauge 9, and controls the moving speed of the loose mesh cloth through the first servo frequency conversion motor 7 and controls the rotation speed of the second transfer roller 5 through the second servo frequency conversion motor 8, so as to achieve precise control of the amount of adhesive applied.

[0065] The composite zone 300 is equipped with a hot-pressing composite drying device 310 for hot-pressing and drying two layers of raw material paper and a middle layer of loose mesh fabric together. The hot-pressing composite drying device 310 includes a pair of composite pressure rollers 51 for hot-pressing and drying the two layers of raw material paper and the middle layer of loose mesh fabric together, and a closed steam heating device 52 located on the side of the wood pulp mesh paper discharge end of the pair of composite pressure rollers 51. The closed steam heating device 52 includes a closed steam box 53, a wood pulp mesh paper inlet slit 54 and a wood pulp mesh paper outlet slit 55 opened on the closed steam box 53 along the movement path of the wood pulp mesh paper 76. The wood pulp mesh paper 76 entering the closed steam box 53 divides the internal space of the closed steam box 53 into an upper steam chamber 56 and a lower steam chamber 57. Steam supply pipes (not shown in the figure) are respectively provided on the closed steam box 53 and communicate with the upper steam chamber 56 and the lower steam chamber 57 of the closed steam box 53.

[0066] In this embodiment, the pair of composite pressure rollers 51 includes an upper composite pressure roller 58 and a lower composite pressure roller 59; the outer box wall on the side of the wood pulp grid paper discharge end of the pair of composite pressure rollers 51 on the closed steam box 53 includes an upper outer box wall at the entrance located above the wood pulp grid paper inlet slit 54 and a lower outer box wall at the entrance located below the wood pulp grid paper inlet slit 54, wherein the shape of the upper outer box wall at the entrance is adapted to the outer circular shape of the upper composite pressure roller 58, and the shape of the lower outer box wall at the entrance is adapted to the outer circular shape of the lower composite pressure roller 59.

[0067] In this embodiment, the upper warp yarn separating roller 84 is disposed on a path before the upper warp yarn group 81 enters the loose mesh fabric coating device 210, and the lower warp yarn separating roller 85 is disposed on a path before the lower warp yarn group 83 enters the loose mesh fabric coating device 210.

[0068] In the online web-laying anti-yarn disorder device 110 of this embodiment, a synchronous airflow generator 89 is provided on the path from the middle layer weft yarn group 82 to the loose mesh fabric coating device 210. This synchronous airflow generator generates a moving airflow around the middle layer weft yarn group 82, and the moving speed of the moving airflow is the same as or close to the moving speed of the middle layer weft yarn group 82. The synchronous airflow generator 89 includes an upper air supply box 90 and a lower air supply box 91 arranged vertically. The upper air supply box 90 is located in the middle layer... Above the latitude group 82, the lower air supply box 91 is located below the middle latitude group 82. The bottom surface of the upper air supply box 90 is densely covered with upper air supply holes 92 that blow obliquely toward the middle latitude group 82 in the direction of movement. The top surface of the lower air supply box 91 is densely covered with lower air supply holes 93 that blow obliquely toward the middle latitude group 82 in the direction of movement. The upper air supply box 90 and the lower air supply box 91 are respectively connected to the air supply system 94.

[0069] Preferably, the densely arranged air supply holes (upper air supply hole 92, lower air supply hole 93) can also be replaced by spaced air supply slits. The air supply slits are parallel to or substantially consistent with the latitude lines in the middle layer latitude line group 82, and the airflow direction blown out by the air supply slits is still oblique.

[0070] Preferably, the synchronous airflow generator 89 is positioned close to the sparse mesh fabric coating device 210.

[0071] Preferably, an anemometer 95 is installed on the synchronous airflow generator 89 at one end near the loose mesh fabric coating device 210; the air supply system 94 and the anemometer 95 are respectively connected to the control system 10 of the wood pulp mesh paper production line.

[0072] Preferably, the anemometer 95 includes an electrically heated constant current wire and a detection and control circuit module connected to the constant current wire for controlling the current of the constant current wire to be constant and detecting the resistance of the constant current wire.

[0073] The working principle of the anemometer 95 is as follows: the air flow rate changes the heat dissipation rate of the constant current wire, which in turn changes the temperature of the constant current wire. The temperature change causes the internal resistance of the constant current wire to change. By converting the air flow rate signal into the resistance signal of the constant current wire, the air flow rate can be detected.

[0074] During operation, the control system 10 measures the airflow speed around the middle latitude group 82 through the anemometer 95 and determines whether the airflow speed is the same as or close to the moving speed of the middle latitude group 82. If the speed exceeds the tolerance, the air supply speed of the air supply system 94 is adjusted so that the airflow speed is the same as or close to the moving speed of the middle latitude group 82. This can eliminate or greatly reduce the airflow impact on the middle latitude group 82 when it moves at high speed, thereby eliminating or slowing down the bending deformation of the latitude.

[0075] Preferably, an ambient temperature sensor 96 is also installed on the wood pulp grid paper production line. The ambient temperature sensor 96 is installed on the upper air supply box 90 or the lower air supply box 91, and is connected to the control system 10 of the wood pulp grid paper production line. The ambient temperature value around the middle weft group 82 measured by the ambient temperature sensor 96 can be used for ambient temperature compensation when the anemometer 95 is measuring, thereby making the air velocity data measured by the anemometer 95 more accurate.

[0076] In this embodiment, the surfaces of the coating roller 1 and the pressing roller 2 of the loose mesh fabric coating device 210 are both provided with a conductive coating layer, and the conductive coating of the coating roller 1 and the pressing roller 2 is externally connected to a low-voltage power supply; a pair of conductive rods 88 are inserted into the coating pool 3, and the pair of conductive rods 88 are externally connected to a low-voltage power supply; the transfer roller (first transfer roller 4, second transfer roller 5) includes a first transfer roller 4 whose lower side of the roller surface is immersed in the coating pool 3, and a second transfer roller 5 disposed between the coating roller 1 and the first transfer roller 4 and in contact with the coating roller 1 and the first transfer roller 4 respectively, the surface of the second transfer roller 5 is provided with a conductive coating layer, and the conductive coating of the second transfer roller 5 is externally connected to a low-voltage power supply.

[0077] Preferably, in the loose mesh fabric coating device 210, the coating tank 3 is further provided with a liquid level monitor 17 for monitoring the liquid level of the adhesive in the coating tank 3. The liquid level monitor 17 includes a bridge plate 18 disposed on one side of the upper end of the coating tank 3 and a liquid level gauge 19 disposed on the bridge plate 18. The liquid level monitoring probe of the liquid level gauge 19 points downward toward the coating tank 3. The liquid level gauge 19 is connected to the control system 10 of the wood pulp mesh paper production line.

[0078] As a further improvement, the loose mesh fabric coating device 210 of this embodiment is also provided with a liquid level dynamic stabilizer 20 for reducing the liquid level of the adhesive in the coating tank 3. The liquid level dynamic stabilizer 20 includes a servo electric push rod 21 fixed on the bridge plate 18 and a fully enclosed volume floating box 22 located at the lower end of the telescopic rod of the servo electric push rod 21 and occupying a certain volume. The fully enclosed volume floating box 22 is partially immersed in the coating tank 3. The servo electric push rod 21 is connected to the control system 10 of the wood pulp mesh paper production line.

[0079] Preferably, the volume of the fully enclosed volumetric flotation tank 22 is 1 / 10 to 1 / 5 of the volume of the adhesive liquid in the adhesive coating tank 3.

[0080] The working principle of the aforementioned liquid level dynamic stabilizer 20 is as follows: The control system 10 monitors whether there are fluctuations in the liquid level of the adhesive in the coating tank 3 through the liquid level monitor 17. When the liquid level fluctuates and exceeds a predetermined threshold, the control system drives the extension rod of the servo electric push rod 21 to move, causing the fully enclosed volumetric flotation tank 22 to rise or fall, thereby achieving the purpose of maintaining and stabilizing the liquid level in the coating tank 3. For example, when the liquid level of the adhesive in the coating tank 3 is lower than the set value, the fully enclosed volumetric flotation tank 22 moves down, causing the fully enclosed volumetric flotation tank 22 to occupy more space in the adhesive in the coating tank 3, thereby causing the liquid level of the adhesive in the coating tank 3 to rise to the set value; when the liquid level of the adhesive in the coating tank 3 is higher than the set value, the fully enclosed volumetric flotation tank 22 rises, causing the fully enclosed volumetric flotation tank 22 to occupy less space in the adhesive in the coating tank 3, thereby causing the liquid level of the adhesive in the coating tank 3 to fall to the set value.

[0081] Preferably, a pair of outlet guide rollers 60 arranged vertically to guide the movement of the wood pulp grid paper 76 are also provided on the closed steam box 53 near the wood pulp grid paper outlet slit 55. The wood pulp grid paper 76 is drawn out from the wood pulp grid paper outlet slit 55 and then drawn out between the pair of outlet guide rollers 60. A rubber plate 61 is provided on the outer wall of the closed steam box 53 near the wood pulp grid paper outlet slit 55, and the pair of outlet guide rollers 60 are respectively attached to the rubber plate 61.

[0082] Preferably, on the outer walls of the front and rear sides of the enclosed steam box 53, near the wood pulp grid paper inlet slit 54, there are roller stop tongues 62 extending toward the pressing part of the pair of composite rollers 51, and the shape of the extended end of the roller stop tongue 62 is adapted to the outer circle shape of the pair of composite rollers 51.

[0083] Preferably, on the outer walls of the front and rear sides of the enclosed steam box 53, near the wood pulp grid paper outlet slit 55, guide roller stop tongues 63 extending toward the pressing part of the pair of outlet guide rollers 60 are respectively provided, and the shape of the extended end of the guide roller stop tongue 63 is adapted to the outer circle shape of the pair of outlet guide rollers 63.

[0084] The setting of the pressure roller baffle 62 and guide roller baffle 63 on the above-mentioned closed steam box 53 can effectively improve the sealing performance of steam, thereby reducing steam loss and ensuring the high-temperature heating effect of steam.

[0085] Preferably, a pair of L-shaped strip sealing blocks 64 are fixed to the outer walls of the upper and lower sides of the closed steam box 53, and the pair of strip sealing blocks 64 are respectively in contact with the outer circle of the roller surface of the pair of composite pressure rollers 51 along the axial direction of the composite pressure rollers 51.

[0086] Preferably, an open steam heating device 65 is also provided on the side of the pulp grid paper discharge end of the pair of outlet guide rollers 60. The open steam heating device 65 includes a pair of steam heating boxes 66 arranged in the vertical direction. The pulp grid paper 76 is drawn out from between the pair of outlet guide rollers 60 and enters between the pair of steam heating boxes 66. The side of the pair of steam heating boxes 66 facing the pulp grid paper 76 is densely provided with steam injection holes 67. The internal steam chambers 68 of the pair of steam heating boxes 66 are respectively connected to steam supply pipes (not shown in the figure).

[0087] In this embodiment, the wood pulp grid paper 76 is drawn out from between the steam heating boxes 66 and enters the paper storage area 69, and then the wood pulp grid paper 76 is wound up by the winding device 70.

[0088] As a further improvement of this embodiment, the paper storage area 69 is an open paper storage area. A transverse cross-flow air generator 75 is provided on the open paper storage area 69 to enhance the drying effect of the wood pulp grid paper 76. The transverse cross-flow air generator 75 includes a front ventilation hood 71 and a rear ventilation hood 72 respectively located on the front and rear sides of the open paper storage area 69 to accelerate the ventilation of the wood pulp grid paper 76 in the front and rear directions. A number of blowers 73 for supplying air into the paper storage area 69 are arranged in an array on the cover of the front ventilation hood 71, and a number of exhaust fans 74 for extracting air from the paper storage area 69 are arranged in an array on the cover of the rear ventilation hood 72.

[0089] The aforementioned transverse cross-flow air generator 75 makes full use of the space of the open paper storage area 69. While meeting the buffering requirements for the winding of the wood pulp grid paper 76, it also relies on the serpentine arrangement and zigzag movement of the wood pulp grid paper 76 in the paper storage area 69 to generate a high-speed transverse cross-flow air that can fully contact the wood pulp grid paper 76 and remove its internal moisture, thereby further improving the drying effect.

[0090] In this embodiment, the composite pressure roller 51 is a hot pressure roller with a built-in heating device.

[0091] As a further improvement, the loose mesh fabric coating device 210 of this embodiment is also provided with a temporary shutdown maintenance structure. The temporary shutdown maintenance structure includes a pressure roller 2 disposed above the coating roller 1 via a lifting mechanism 13, a drive wheel 31 disposed on one side above the pressure roller 2 for contacting the pressure roller 2 after it moves up, an air knife 32 disposed parallel to the pressure roller 2 for approaching the pressure roller 2 after it moves up, an ultrasonic water mist nozzle 33 disposed inside the air knife 32, and an ultrasonic water mist generator 34 connected to the ultrasonic water mist nozzle 33. The air outlet of the air knife 32 faces the roller surface of the pressure roller 2.

[0092] In this embodiment, a frame 14 is provided on the loose mesh fabric coating device 210, and the lifting mechanism 13 is fixed on the frame 14.

[0093] Preferably, the lifting mechanism 13 includes a plurality of guide columns 35 erected vertically on the top of the frame 14, a lifting plate 36 movable in the vertical direction on the guide columns 35, a lifting cylinder 37 connected between the top of the frame 14 and the lifting plate 36, and a pair of supports 38 disposed on the front and rear sides of the lifting plate 36. The two ends of the pressure roller 2 are rotatably disposed on the pair of supports 38 through rolling bearings.

[0094] Preferably, a drive wheel bracket 39 is connected to the frame 14, and the drive wheel 31 is rotatably mounted on the drive wheel bracket 39 and rotates through a transmission connection with the reduction transmission motor 40.

[0095] Preferably, there are several ultrasonic water mist nozzles 33 inside the air knife 32, and the several ultrasonic water mist nozzles 33 are evenly spaced along the axial direction parallel to the pressure roller 2 inside the air knife 32.

[0096] Preferably, the frame 14 is further provided with an air knife support 41, and the air knife 32 is fixed on the air knife support 41.

[0097] To improve the humidification effect of the spray, a V-shaped diffuser 42 is provided on the air outlet of the air knife 32.

[0098] As a further improvement, the temporary shutdown maintenance structure of the glue coating device in this embodiment is also provided with a water droplet collector 43 to prevent water droplets from falling directly onto the lower glue coating roller 1. The water droplet collector 43 includes a pair of rotating arms 44 arranged along the front and rear sides and an arc-shaped water droplet collection box 45 connected between one end of the pair of rotating arms 44. The other ends of the pair of rotating arms 44 are respectively rotatably mounted on the front and rear ends of the pressure roller 2. The bottom of the arc-shaped water droplet collection box 45 is provided with a drain outlet 46 at the end along the front and rear direction. A drain pipe (not shown in the figure) extending outward from the front and rear ends is connected to the drain outlet 46. A servo reduction motor 47 for driving the rotating arms 44 to rotate around the two ends of the pressure roller 2 is also provided on the support 38. A drive gear 48 is provided on the output shaft of the servo reduction motor 47, and a driven gear 49 is provided on the rotating arm 44 near the end of the pressure roller 2. The drive gear 48 meshes with the driven gear 49.

[0099] By installing a water droplet collector 43 in the temporary shutdown maintenance structure of the loose mesh fabric coating device 210, water droplets generated by prolonged humidification can be collected by the water droplet collector 43 and fall directly into the coating tank 3 or discharged outside the coating tank 3, thus not adversely affecting the coating quality of the wood pulp mesh paper 76 being produced, thereby ensuring the stability and reliability of the production quality of the wood pulp mesh paper 76.

[0100] When the wood pulp grid paper production line is temporarily shut down, the lifting mechanism 13 of the loose mesh gluing device 210 is activated first, thereby driving the pressure roller 2 to rise and disengage from the gluing roller 1, while simultaneously approaching the drive wheel 31 on one side above the pressure roller 2; after the pressure roller 2 approaches the drive wheel 31, it rotates synchronously under the drive of the drive wheel 31, and at the same time, the servo reduction motor 47 drives the rotating arm 44 to rotate downward around the central axis of the two ends of the pressure roller 2 through gear transmission, thereby turning the arc The arc-shaped water droplet collection box 45 rotates to a position below the pressure roller 2. Once in position, the air knife 32 and the ultrasonic water mist nozzle 33 are activated. The ultrasonic water mist from the air knife 32 is sprayed onto the roller surface of the pressure roller 2 to achieve a moisturizing effect on the surface of the pressure roller 2. During the moisturizing process, excess water droplets on the surface of the pressure roller 2 are discharged from the drain pipe of the arc-shaped water droplet collection box 45. The water droplets discharged from the drain pipe avoid the coating roller 1 below and the loose mesh cloth 16 laid online and fall directly into the coating pool 3 or are discharged outside the coating pool 3.

[0101] In this embodiment, a transfer roller is provided on the coating tank 3 to transfer the water-based adhesive in the coating tank 3 to the coating roller 1. During temporary shutdown, the transfer roller and the coating roller 1 on the lower coating tank 3 continue to rotate, thus ensuring that the adhesive on the surface of the transfer roller and the coating roller 1 remains moist even during temporary shutdown, eliminating the need for special cleaning and maintenance, and ensuring the continuation of production after the shutdown.

[0102] When the loose mesh fabric coating device 210 resumes operation after a temporary shutdown, the servo reduction motor 47 first drives the rotating arm 44 to rotate upward around the central axis of the two ends of the pressure roller 2 via gear transmission, thereby rotating the arc-shaped water droplet collection box 45 to one side of the pressure roller 2; then the lifting mechanism 13 is activated, thereby driving the pressure roller 2 to descend and press against the coating roller 1, pressing the loose mesh fabric 16 laid online between the pressure roller 2 and the coating roller 1, and after it is in place, the loose mesh fabric coating device 210 is started to perform the coating operation.

[0103] In this embodiment, the opening and closing of the air knife 32, the opening and closing of the ultrasonic water mist nozzle 33, the opening and closing of the reduction drive motor 40, the opening and closing of the servo reduction motor 47, and the operation of the lifting mechanism 13 are all controlled by the control system 10 of the wood pulp grid paper production line.

[0104] In this embodiment, an upper warp unwinding device and a lower warp unwinding device (not shown in the figure) are respectively provided behind the upper warp group 81 and the lower warp group 83. After the warp threads released from the upper warp unwinding device and the lower warp unwinding device reach the online web laying area 100, they are guided and separated by the warp splitting roller to form the upper warp group 81 and the lower warp group 83 in the online web laying area 100, respectively.

[0105] In this embodiment, a weft yarn laying device 120 is also provided. The weft yarn laying device 120 includes a pair of synchronous transmission belt mechanisms 121 arranged separately according to the front and rear positions. Each synchronous transmission belt mechanism 121 includes a pair of synchronous transmission wheels 122 arranged in the left and right direction and a synchronous transmission narrow belt 123 connected between the pair of synchronous transmission wheels 122. The synchronous transmission narrow belt 123 has elastic hooks 124 for fixing the weft yarns evenly arranged at intervals according to the spacing of the weft yarns. A weft yarn laying shuttle robot 125 is also provided above the pair of synchronous transmission belt mechanisms 121. The weft yarn laying shuttle robot 125 is connected to the middle layer weft yarn unwinding device (not shown in the figure). A group of weft yarns released from the middle layer weft yarn unwinding device is fixed between the elastic hooks 124 located on the front and rear synchronous transmission narrow belts 123 by the weft yarn laying shuttle robot 125, thereby forming the middle layer weft yarn group 82.

[0106] In this embodiment, a raw material paper unwinding device (not shown in the figure) is provided, and the upper and lower layers of raw material paper (upper layer raw material paper 311 and lower layer raw material paper 312) enter the hot-pressing composite drying device 310 through the raw material paper guide roller 313 respectively.

[0107] The raw material paper guide roller 313 is connected to a low-voltage power supply to reduce or eliminate static electricity during lamination.

[0108] In order to achieve continuous online web laying of the loose mesh fabric 16 and continuous lamination of the loose mesh fabric 16 with the upper and lower layers of raw material paper (upper layer raw material paper 311 and lower layer raw material paper 312) after gluing, the loose mesh fabric gluing device 210 and the hot-pressing composite drying device 310 are arranged between the pair of synchronous transmission belt mechanisms 121 arranged in the front-to-back direction and between the pair of synchronous transmission wheels 122 in the left-to-right direction. A weft separation cutter 126 is provided at the synchronous wheel located in front of the pair of synchronous transmission wheels 122. The loosely laid mesh fabric 16 enters the loosely laid mesh fabric coating device 210 for coating. After coating, the loosely laid mesh fabric 16 is combined with the upper and lower layers of raw material paper (upper layer raw material paper 311, lower layer raw material paper 312) and then enters the hot-press composite drying device 310 for hot-press composite drying to form wood pulp mesh paper 76. When the wood pulp mesh paper 76 coming out of the hot-press composite drying device 310 moves forward to the synchronous drive wheel 122, the terminals of the weft threads connected to the elastic hook 124 are cut by the weft thread separating cutter 126 located at the synchronous drive wheel 122, so that the weft threads are separated from the synchronous drive narrow belt 123. This allows the middle layer weft thread group 82, which has been composited between the upper and lower layers of raw material paper (upper layer raw material paper 311, lower layer raw material paper 312), to continue to move forward, which facilitates the continuous winding of the subsequent wood pulp mesh paper 76.

[0109] In this embodiment, an elastic hook 124 is provided on the synchronous drive narrow belt 123 to allow the weft yarn to obtain a certain tension. However, in order to avoid the thinner weft yarn being pulled apart, the weft yarn tension should be set to be relatively small. Considering the impact of airflow, the high-speed moving weft yarn with a small tension may bend to some extent before entering the synchronous airflow generator 89. However, after the weft yarn enters the synchronous airflow generator 89, due to the reduction or elimination of airflow impact, the weft yarn will return to a straight state under the elastic tension of the elastic hook 124, thereby ensuring that the yarn mesh of the loose mesh fabric 16 laid in the web has a relatively regular rectangular mesh when compounded.

[0110] Example 2: An online lamination and gluing process for wood pulp grid paper, comprising the following steps: (1) Online web laying; The yarns in the upper warp group 81, the middle weft group 82 and the lower warp group 83 located in the online web laying area 100 move forward and enter between the coating roller 1 and the pressure roller 2 of the loose mesh fabric coating device 210 in the coating area 200, so that the upper warp group 81, the middle weft group 82 and the lower warp group 83 are laid up, down, and in the upper, middle and lower positions to complete the online web laying operation; (2) Gluing: The loose mesh fabric gluing device 210 located in the gluing area 200 transfers the water-based glue in the gluing pool 3 to the gluing roller 1 through the transfer roller (first transfer roller 4, second transfer roller 5). The water-based glue transferred to the gluing roller 1 comes into contact with the yarn of the loose mesh fabric 16 laid in the online web between the gluing roller 1 and the pressure roller 2, thereby applying the water-based glue to the yarn in the upper warp group 81, the middle weft group 82 and the lower warp group 83, and completing the gluing operation. After gluing, the yarn is pressed and heated by the pressure roller 2 and the gluing roller 1 in the hot state. The yarn in the upper warp group 81, the middle weft group 82 and the lower warp group 83 are hot melt bonded at the intersection of the warp and weft to form a loose mesh fabric 16 with water-based glue on the surface. (3) Lamination: The loose mesh fabric 16 that comes out of the online lamination device 210 continues to move forward and enters the hot-press lamination drying device 310 together with the upper raw material paper 311 above it and the lower raw material paper 312 below it, between a pair of hot lamination rollers (upper lamination roller 58 and lower lamination roller 59) in the hot-press lamination drying device 310, and forms wood pulp mesh paper 76 by hot melt bonding; (4) Drying: The wood pulp grid paper 76 that comes out from between a pair of hot composite pressure rollers (upper composite pressure roller 58 and lower composite pressure roller 59) enters the closed steam heating device 52 for high-temperature steam heating. After the wood pulp grid paper 76 comes out of the closed steam heating device 52, its moisture evaporates rapidly at high temperature, thereby achieving the first drying of the wood pulp grid paper 76. Then the wood pulp grid paper 76 enters the open steam heating device 65 for high-temperature steam heating, thereby achieving the second drying of the wood pulp grid paper 76. After drying at room temperature and ventilation, it is then wound up.

[0111] The above-mentioned secondary high-temperature steam heating and drying not only improves the drying effect, but also enhances the wrinkling effect of the wood pulp grid paper 76, thereby improving the manufacturing quality of the wood pulp grid paper 76.

[0112] Preferably, the ambient temperature ventilation drying of the wood pulp grid paper 76 is carried out in the open paper storage area 69. The ventilation speed is accelerated by the transverse cross-flow air generator 75 set at the front and rear positions of the open paper storage area 69, thereby further improving the drying effect of the wood pulp grid paper 76.

[0113] As a further improvement to the online lamination and gluing method of the online lamination and gluing process system for wood pulp grid paper in this embodiment, during the online lamination and gluing process, a low-voltage power supply is turned on for static electricity elimination to prevent the sand threads from sticking together; the synchronous airflow generator 89 is also turned on so that the airflow speed around the middle layer weft group 82 is consistent with or close to the movement speed of the middle layer weft group 82, thereby eliminating or reducing the airflow impact on the weft threads in the middle layer weft group 82 during high-speed movement, and thus eliminating or reducing the bending deformation of the weft threads; when the wood pulp grid paper production line is temporarily stopped, the pressure roller 2 is moved upward by the lifting mechanism 13 to disengage from the coating roller 1. The transfer rollers (first transfer roller 4, second transfer roller 5) and the coating roller 1 of the loose mesh fabric coating device 210 continue to rotate. At the same time, the temporary shutdown maintenance structure on the loose mesh fabric coating device 210 is activated to perform ultrasonic water mist humidification on the upward-moving pressure roller 2. This ensures that the surface of the transfer rollers (first transfer roller 4, second transfer roller 5) and the coating roller 1 is moistened with adhesive during the temporary shutdown state. Meanwhile, the surface of the pressure roller 2 can maintain a certain level of humidity. This ensures that after the shutdown, there is no need to perform special cleaning and maintenance on the transfer rollers (first transfer roller 4, second transfer roller 5), the coating roller 1, and the pressure roller 2, so that production can resume immediately after the shutdown.

[0114] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An apparatus for online gluing of wood pulp grid paper, characterized in that, The system includes an online web-laying anti-yarn disorder device installed before the sparse mesh fabric coating device, following the online web-laying and gluing process of wood pulp mesh paper. The online web-laying anti-yarn disorder device comprises an upper warp group, a middle weft group, and a lower warp group for online web-laying to form the sparse mesh fabric, and warp yarn separating rollers respectively installed on the moving paths of the upper and lower warp groups. The warp yarn separating rollers include an upper warp yarn separating roller that contacts the warp yarns in the upper warp group and a lower warp yarn separating roller that contacts the warp yarns in the lower warp group. A number of annular separating grooves are spaced apart on the outer circumference of the warp yarn separating rollers. A synchronous airflow generator is installed on the path of the middle weft group entering the sparse mesh fabric coating device to form a moving airflow around the middle weft group, with the moving speed of the moving airflow being the same as or close to the moving speed of the middle weft group. The synchronous airflow generator includes an upper air supply box and a lower air supply box arranged vertically. The upper air supply box is located above the middle latitude group, and the lower air supply box is located below the middle latitude group. The bottom surface of the upper air supply box is densely covered with upper air supply holes that blow obliquely toward the middle latitude group in the direction of movement. The top surface of the lower air supply box is densely covered with lower air supply holes that blow obliquely toward the middle latitude group in the direction of movement. The loose mesh fabric coating device includes a coating roller, a pressing roller disposed above the coating roller, a coating pool disposed below the coating roller, a first transfer roller with its lower side immersed in the coating pool, and a second transfer roller disposed between the coating roller and the first transfer roller and in contact with the coating roller and the first transfer roller respectively; wherein, a cylindrical moisture-absorbing film is sleeved on the outer circumference of the coating roller.

2. The apparatus for online gluing of wood pulp grid paper according to claim 1, characterized in that, The upper air supply box and the lower air supply box are respectively connected to the air supply system.

3. The apparatus for online gluing of wood pulp grid paper according to claim 2, characterized in that, An anemometer is installed on the synchronous airflow generator at one end near the sparse mesh fabric coating device.

4. The apparatus for online gluing of wood pulp grid paper according to claim 3, characterized in that, The air supply system and anemometer are respectively connected to the control system of the wood pulp grid paper production line.

5. The apparatus for online gluing of wood pulp grid paper according to claim 1, characterized in that, The loose mesh fabric coating device is equipped with a temporary shutdown maintenance structure, which includes a pressure roller mounted above the coating roller via a lifting mechanism, a drive wheel mounted on one side above the pressure roller for contacting the pressure roller after it moves up, an air knife mounted parallel to the pressure roller for approaching the pressure roller after it moves up, an ultrasonic water mist nozzle mounted inside the air knife, and an ultrasonic water mist generator connected to the ultrasonic water mist nozzle. The air outlet of the air knife faces the roller surface of the pressure roller.

6. The apparatus for online gluing of wood pulp grid paper according to claim 5, characterized in that, When the wood pulp grid paper production line is temporarily shut down, the pressure roller is lifted by the lifting mechanism to disengage from the coating roller, while the transfer roller and coating roller of the loose mesh fabric coating device continue to rotate. At the same time, the temporary shutdown maintenance structure on the loose mesh fabric coating device is activated to perform ultrasonic water mist humidification on the lifted pressure roller, thereby ensuring that the adhesive on the surface of the transfer roller and coating roller is moist during the temporary shutdown. At the same time, the surface of the pressure roller can maintain a certain humidity, thus ensuring that no special cleaning and maintenance is required for the transfer roller, coating roller and pressure roller after the shutdown, so that production can resume immediately after the shutdown.

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