Device for online net laying and gluing of wood pulp gridding paper

Abstract

The invention discloses a device for online lapping and gluing of wood pulp gridding paper. The device comprises an online lapping yarn disorder prevention device arranged in front of a loose gridding cloth gluing device. The on-line lapping yarn disorder prevention device comprises an upper-layer warp group, a middle-layer weft group, a lower-layer warp group and warp separator rollers arranged on moving paths of the upper-layer warp group and the lower-layer warp group respectively. The warp yarn separator rollers comprise an upper-layer warp yarn separator roller and a lower-layer warp yarn separator roller; the upper-layer warp yarn separator roller is connected with the warp yarns in the upper-layer warp yarn group in an abutting manner; the lower-layer warp yarn separator roller is connected with the warp yarns in the lower-layer warp yarn group in an abutting manner; a plurality of annular yarn separator grooves are distributed in the excircles of the warp yarn separator rollers at intervals; a synchronous airflow generator is arranged on the path, entering the loose gridding cloth gluing device, of the middle-layer weft set, wherein the synchronous airflow generator is used for forming moving airflow around the middle-layer weft set, and the moving speed of the moving airflow is the same as or close to the moving speed of the middle-layer weft set. The production quality of the wood pulp gridding paper is improved.

Description

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

[0002] The present invention relates to the technical field of wood pulp grid paper production and manufacturing, in particular to an online web-laying and gluing composite process system and method for wood pulp grid paper, and also to a device for online web-laying and gluing of wood pulp grid paper. Background Art

[0003] Wood pulp grid paper is a commonly used industrial cleaning product for absorbing liquids, removing stains, and wiping surfaces. Typical wood pulp grid paper is a three-layer composite structure: a middle layer of fibrous scrim (also known as scrim), and the bottom and top layers are wood pulp raw paper, produced through a special composite process.

[0004] Wood pulp grid paper has a wide range of applications and uses. It can be used in industrial fields such as mechanical processing, automobile manufacturing, electronics production, and aviation. It is often used in automobile maintenance and servicing, hospitals, laboratories, and other places, as well as for the sanitation and cleaning of instruments and meters.

[0005] Wood pulp grid paper undergoes bidirectional shrinkage to create a unique wrinkled and foamed effect, enhancing flexibility, comfort, high absorbency, and stretchability. This results in high strength, strong absorbency, safety, environmental friendliness, non-toxicity, and linting resistance. It can replace existing rags, maintaining the safety of the production environment, products, and personnel. Furthermore, due to its excellent water absorption, chemical resistance, tensile strength, anti-static properties, resistance to breakage, lint-free properties, and reusability, wood pulp grid paper is a key cleaning material in industrial applications, significantly improving cleaning efficiency and quality.

[0006] Conventional wood pulp grid paper is produced using a two-step process, which separates the preparation of the scrim from its lamination with the raw paper. The first step involves producing the scrim using a dedicated scrim production line (or directly purchasing the scrim from outside), and the second step involves laminating the scrim with the raw paper using a dedicated lamination line. However, due to the limited availability of high-quality scrim manufacturers in China, high-end applications (such as surgical paper) require expensive importation of finished scrims that meet stringent quality requirements. This results in high production costs for high-end wood pulp grid paper. Therefore, our company has developed a wood pulp grid paper production machine that eliminates the need for finished scrims. The equipment adopts the online laying forming technology of the sparse grid material layer, and forms the sparse grid material layer as the sparse grid cloth by online laying of the yarn weft and warp. It also uses a specially designed counter-pressing composite roller to press and composite the upper and lower layers of raw paper and the sparse grid material layer coated with glue in the middle layer, and forms wood pulp grid paper after drying.

[0007] The above-mentioned wood pulp grid paper production process involves a process of gluing the online laid scrim. In this gluing process, water-based glue needs to be applied to the online laid scrim, and then overlapped with the upper and lower layers of raw paper after gluing. After pressing, laminating and drying, the wood pulp grid paper is made.

[0008] However, due to the large spacing between the warp and weft of the scrim, and the poor moisture absorption of the hot-melt yarn material itself, if traditional gluing equipment is used for gluing, it is easy for uneven excess glue to accumulate on the scrim, resulting in unstable film thickness control and uneven gluing, which in turn leads to the phenomenon of excessive thickness uniformity of the produced wood pulp grid paper.

[0009] In the gluing process of the above-mentioned scrim, a gluing device with a transfer roller, a gluing roller and a glue pressing roller is used to gluing the scrim. The specific gluing process is to arrange the scrim laid online between the glue pressing roller and the glue coating roller arranged above and below, and transfer the aqueous glue to the glue coating roller through the transfer roller partially immersed in the glue pool, and use the pressure between the glue pressing roller and the glue coating roller to evenly coat the glue on the scrim.

[0010] However, since the moisture in the water-based glue will evaporate rapidly in a short period of time after being exposed to the air, if the wood pulp grid paper production equipment is temporarily shut down due to various reasons, when the equipment is restarted, the moisture in the glue on the surface of the transfer roller, glue coating roller and glue pressing roller exposed to the air in the gluing device will evaporate rapidly within tens of seconds or even seconds, causing the glue to solidify on the roller surface. The operator needs to perform special cleaning and maintenance before production can continue, thereby increasing the maintenance workload of the equipment and reducing the efficiency of wood pulp grid paper production. In addition, due to the difference in skills of the operators, there is a possibility that the solidified glue will not be cleaned thoroughly when manual cleaning is used, which will affect the quality of subsequent gluing.

[0011] The production process for this wood pulp grid paper involves pressing and laminating two layers of raw paper and a middle layer of glue-coated loose mesh material, followed by drying. Traditional ovens for drying wood pulp grid paper suffer from long drying times and high energy consumption. Furthermore, these long drying times can lead to reduced quality in the resulting wood pulp grid paper.

[0012] The above-mentioned wood pulp grid paper production process also involves an online laying process for a sparse grid cloth. The online laying process divides the yarn into three layers: upper, middle and lower. The upper yarn and the lower yarn are respectively an upper warp group and a lower warp group composed of a number of parallel and spaced warps, and the middle yarn is a middle weft group composed of a number of parallel and spaced wefts. After the three layers of yarn are laid separately, they enter the gluing device between the gluing roller and the gluing roller for gluing and overlapping. The sparse grid cloth formed after gluing and overlapping is then compounded with the upper and lower layers of raw paper, and made into wood pulp grid paper after drying.

[0013] When laying scrim, the yarns must be kept under a certain tension during the laying process. However, due to the long and thin warp yarns, the tension applied to the warps cannot be too high, which can lead to some disturbance in the warps. Furthermore, high-speed yarn movement can easily generate static electricity, which can easily cause these disturbed warp yarns to stick together during high-speed movement. Furthermore, although the weft yarns are relatively short, the air in front of them can impact them during high-speed movement, causing them to bend, which can also affect the quality of the laid mesh. Summary of the Invention

[0014] To solve the above problems, the present invention proposes an online web-laying and gluing composite 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 laying and gluing laminating process system for wood pulp grid paper, comprising an online laying area, a gluing area and a laminating area arranged in sequence on a wood pulp grid paper production line according to the process flow of wood pulp grid paper production; Wherein, the online laying area is provided with an online laying anti-yarn disorder device for preventing yarn disorder when the scrim cloth for wood pulp grid paper is laid online, and the online laying anti-yarn disorder device includes an upper warp group, a middle weft group and a lower warp group for laying online to form the scrim cloth, and warp separation rollers respectively arranged on the moving paths of the upper warp group and the lower warp group; the warp separation rollers include an upper warp separation roller abutting against the warps in the upper warp group and a lower warp separation roller abutting against the warps in the lower warp group, and a number of annular separation grooves are spaced apart on the outer circumference of the warp separation rollers; The gluing area is provided with a scrim gluing device for gluing the yarns in the upper warp group, the middle weft group and the lower warp group constituting the scrim, the scrim gluing device comprising a gluing roller, a gluing roller arranged above the gluing roller, a gluing pool arranged below the gluing roller, a first transfer roller whose lower side of the roller surface is immersed in the gluing pool, and a second transfer roller arranged between the gluing roller and the first transfer roller and in contact with the gluing roller and the first transfer roller respectively; wherein the outer circumference of the gluing roller is covered with a cylindrical moisture-absorbing film; Among them, the composite area is provided with a hot pressing composite drying device for hot pressing and compounding the upper and lower layers of raw paper and the middle layer of loose mesh cloth together and drying them. The hot pressing composite drying device includes a pair of composite pressing rollers and a closed steam heating device arranged on the side of the wood pulp grid paper discharge end of the pair of composite pressing rollers. The closed steam heating device includes a closed steam box, a wood pulp grid paper inlet slit and a wood pulp grid paper outlet slit on the closed steam box along the moving path of the wood pulp grid paper. The wood pulp grid 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. The closed steam box is respectively provided with steam supply pipes corresponding to the upper steam chamber and the lower steam chamber of the closed steam box.

[0015] In the present invention, the upper warp thread separation roller is arranged on a section of the path before the upper warp thread group enters the loose mesh cloth gluing device, and the lower warp thread separation roller is arranged on a section of the path before the lower warp thread group enters the loose mesh cloth gluing device.

[0016] In the online laying yarn disorder prevention device of the present invention, a synchronous airflow generator is provided on the path where the middle layer weft thread group enters the loose mesh cloth gluing device, which is used to form a moving airflow around the middle layer weft thread group, and the moving speed of the moving airflow is the same as or close to the moving speed of the middle layer weft thread group; the synchronous airflow generator includes an upper air supply box and a lower air supply box arranged in upper and lower positions, the upper air supply box is located above the middle layer weft thread group, and the lower air supply box is located below the middle layer weft thread group, and upper air supply holes are densely distributed on the bottom end surface of the upper air supply box, which blow obliquely toward the middle layer weft thread group in the moving direction of the middle layer weft thread group, and lower air supply holes are densely distributed on the top end surface of the lower air supply box, which blow obliquely toward the middle layer weft thread group in the moving direction of the middle layer weft thread group; the upper air supply box and the lower air supply box are respectively connected to the air supply system.

[0017] Preferably, an anemometer is provided on the synchronous airflow generator near one end of the scrim gluing device; the air supply system and the anemometer are respectively connected to the control system of the wood pulp grid paper production line.

[0018] In the present invention, the surfaces of the glue coating roller and the glue pressing roller of the loose mesh cloth gluing device are both provided with a layer of conductive coating, and the conductive coatings of the glue coating roller and the glue pressing roller are externally connected to a low-voltage power supply; a pair of conductive rods are inserted into the glue 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 of the roller surface is immersed in the glue coating pool, a second transfer roller arranged between the glue coating roller and the first transfer roller and respectively in contact with the glue coating roller and the first transfer roller, the surface of the second transfer roller is provided with a layer of conductive coating, and the conductive coating of the second transfer roller is externally connected to a low-voltage power supply.

[0019] Preferably, in the scrim gluing device, the gluing pool is further provided with a liquid level monitor for monitoring the glue liquid level in the gluing pool, the liquid level monitor comprising a bridge plate provided on one side of the upper end of the gluing pool, and a liquid level meter provided on the bridge plate, the liquid level monitoring probe of the liquid level meter pointing downwardly to the gluing pool, and the liquid level meter is connected to the control system of the wood pulp grid paper production line; As a further improvement, the sparse mesh cloth gluing device of the present invention is also provided with a liquid level dynamic stabilizer for reducing the liquid level of the glue in the gluing pool. The liquid level dynamic stabilizer includes a servo electric push rod fixed on the bridge plate, and a fully enclosed volume buoyancy box arranged at the lower end of the telescopic rod of the servo electric push rod and whose outer shape occupies a certain volume. The fully enclosed volume buoyancy box is partially immersed in the gluing pool, and the servo electric push rod is connected to the control system of the wood pulp grid paper production line.

[0020] Preferably, in the hot pressing composite drying device, a pair of outlet guide rollers arranged in the up-down direction for guiding the moving direction of the wood pulp grid paper are further provided on the closed steam box near the wood pulp grid paper outlet slit, and the wood pulp grid paper is led out from between the pair of outlet guide rollers after coming out of the wood pulp grid paper outlet slit; a rubber plate is provided on the outer box wall of the closed steam box near the wood pulp grid paper outlet slit, and the pair of outlet guide rollers are respectively abutted against the rubber plate; an open steam heating device is also provided on the wood pulp grid paper discharge end side of the pair of outlet guide rollers, and the open steam heating device includes a pair of steam heating boxes arranged in the up-down direction, and the wood pulp grid paper enters between the pair of steam heating boxes after being led out from between the pair of outlet guide rollers, and the pair of steam heating boxes are densely provided with steam spray holes on the side facing the wood pulp grid paper, and the internal steam chambers of the pair of steam heating boxes are respectively connected to the steam supply pipes.

[0021] As a further improvement, the sparse mesh cloth gluing device of the present invention is also provided with a temporary shutdown maintenance structure, which includes a glue roller arranged above the glue coating roller through a lifting mechanism, a driving wheel arranged on one side above the glue roller for abutting against the glue roller after the glue roller moves up, a wind knife arranged parallel to the glue roller for approaching the glue roller after the glue roller moves up, an ultrasonic water mist nozzle arranged inside the wind knife, and an ultrasonic water mist generator connected to the ultrasonic water mist nozzle, and the air outlet of the wind knife faces the roller surface of the glue roller.

[0022] In the present invention, an upper warp unwinding device and a lower warp unwinding device are respectively arranged behind the upper warp group and the lower warp group. After the warps unwound from the upper warp unwinding device and the lower warp unwinding device reach the online laying area, they are guided and separated by the warp separation rollers in the online laying area to form the upper warp group and the lower warp group respectively.

[0023] In the present invention, a weft laying device is also provided, and the weft laying device includes a pair of synchronous transmission belt mechanisms arranged separately according to front and rear positions, each of the synchronous transmission belt mechanisms includes a pair of synchronous transmission wheels arranged along the left and right directions, and a synchronous transmission narrow belt connected between the pair of synchronous transmission wheels, and elastic hooks for fixing the wefts are evenly arranged on the synchronous transmission narrow belt according to the spacing of the wefts; a weft laying shuttle robot is also provided above the pair of synchronous transmission belt mechanisms, and the weft laying shuttle robot is connected to the middle-layer weft unwinding device, and a group of wefts released from the middle-layer weft unwinding device are fixed between the elastic hooks on the front and rear synchronous transmission narrow belts through the weft laying shuttle robot, thereby forming the middle-layer weft group.

[0024] In order to achieve continuous online laying of the scrim and continuous compounding of the scrim after online laying with the upper layer of raw paper and the lower layer of raw paper after gluing, the scrim gluing device and the hot pressing compound drying device are arranged between the pair of synchronous transmission belt mechanisms arranged front and back in the front-to-back direction, and are located between the pair of synchronous transmission wheels in the left-to-right direction, and a weft separation cutting knife is provided at the synchronous wheel located in the front of the pair of synchronous transmission wheels. The online laid scrim enters the scrim gluing device for gluing. The glued scrim is meshed with the upper and lower layers of raw paper and then enters the hot pressing composite drying device for hot pressing composite drying to form wood pulp grid paper. When the wood pulp grid paper coming out of the hot pressing composite drying device moves forward to the synchronous transmission wheel, the terminals at both ends of the weft connected to the elastic hook are respectively disconnected by the weft separation cutting knife located at the synchronous transmission wheel, so that the weft is separated from the synchronous transmission narrow belt, so that the middle weft group that has been composited between the upper and lower layers of raw paper can continue to move forward, which is convenient for the subsequent continuous winding of the wood pulp grid paper.

[0025] The present invention provides a certain tension to the weft by providing an elastic hook on the synchronous transmission narrow belt. However, to prevent thinner wefts from being broken, the weft tension should be set relatively low. Taking into account the impact of airflow, the high-speed moving weft with low tension may bend slightly before entering the synchronous airflow generator. However, after entering the synchronous airflow generator, the weft will return to a straightened state under the elastic tension of the elastic hook due to the reduction or elimination of airflow impact, thus ensuring that the yarn mesh of the online laid scrim has a relatively regular rectangular grid when it is laminated.

[0026] An online web gluing and laminating method of an online web gluing and laminating process system for wood pulp grid paper comprises the following steps: (1) Online laying: The yarns in the upper warp group, middle weft group and lower warp group in the online laying area move forward respectively and enter between the glue roller and the glue pressing roller of the scrim glue coating device in the glue coating area, so that the upper warp group, middle weft group and lower warp group are laid in the upper, middle and lower positions, completing the online laying operation; (2) Gluing: The scrim gluing device located in the gluing area transfers the water-based glue in the glue pool to the glue roller through the transfer roller. The water-based glue transferred to the glue roller comes into contact with the yarns of the scrim that enter between the glue roller and the pressure glue roller, thereby coating the water-based glue on the yarns in the upper warp group, the middle weft group and the lower warp group, completing the gluing operation. The yarns after gluing are subjected to mutual pressure and heating by the hot pressure glue roller and the gluing roller, and the yarns in the upper warp group, the middle weft group and the lower warp group are hot-melt-bonded at the vertical and horizontal intersections to form an online-laid scrim with water-based glue on the surface. (3) Compounding: The scrim that comes out of the scrim gluing device continues to move forward and enters a pair of hot compounding rollers in the hot pressing compounding drying device together with the upper raw paper above it and the lower raw paper below it, and is hot-melt bonded to form wood pulp grid paper; (4) Drying: The wood pulp grid paper coming out from between a pair of hot composite pressing rollers enters a closed steam heating device for high-temperature steam heating. After the wood pulp grid paper heated by high-temperature steam comes out of the closed steam heating device, its moisture evaporates rapidly at high temperature, thereby achieving the primary drying of the wood pulp grid paper; then the wood pulp grid paper enters an open steam heating device for high-temperature steam heating, achieving the secondary drying of the wood pulp grid paper; then it is rolled up after ventilation drying at normal temperature.

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

[0028] Preferably, the wood pulp grid paper is dried by ventilation at room temperature in an open paper storage area, and the ventilation speed is accelerated by transverse cross-flow wind generators arranged in front and behind the open paper storage area, thereby further improving the drying effect of the wood pulp grid paper.

[0029] As a further improvement of the online web gluing and compounding method of the online web gluing and compounding process system of the wood pulp grid paper of the present invention, during the online web gluing and compounding process, a low-voltage power supply is turned on for anti-static treatment to prevent the adhesion of the sand lines; the synchronous airflow generator is also turned on to make the airflow movement speed around the middle-layer weft thread group consistent with or close to the movement speed of the middle-layer weft thread group, thereby eliminating or reducing the airflow impact on the weft threads in the middle-layer weft thread group during high-speed movement, and further eliminating or reducing the bending deformation of the weft threads; when the wood pulp grid paper production line is temporarily shut down, the pressure roller is moved up by the lifting mechanism to be disengaged from the gluing roller, keeping the transfer roller and the gluing roller of the scrim gluing device continuing to rotate, and at the same time, the temporary shutdown maintenance structure on the scrim gluing device is activated, and the upward-moved pressure roller is subjected to ultrasonic water mist humidification, thereby ensuring that the glue on the surface of the transfer roller and the gluing roller in the temporary shutdown state is moistened, and at the same time, the surface of the pressure roller can maintain a certain humidity, thereby ensuring that the transfer roller, the gluing roller and the pressure roller do not need to be specially cleaned and maintained after the shutdown, so that production can be carried out immediately after the shutdown.

[0030] The beneficial effects of the present invention are: First, the present invention provides an online laying and gluing composite process system and method for wood pulp grid paper. The outer circle of the gluing roller of the specially designed loose grid cloth gluing device is wrapped with a layer of cylindrical moisture-absorbing film, so that the gluing roller has better glue absorption and release capabilities, so that when the gluing of the loose grid cloth is uneven, the glue thickness of the thinner and thicker glue coating areas at local points can be compensated, thereby improving the uniformity of the glue thickness on the loose grid cloth, which is conducive to achieving stable control of the glue thickness of the online laid loose grid cloth, thereby improving the production quality of wood pulp grid paper.

[0031] Second, the present invention provides an online laying and gluing composite process system and method for wood pulp grid paper. A specially designed loose grid cloth gluing device is provided with a liquid level dynamic stabilizer, which can dynamically maintain the constant liquid level height in the gluing pool during the gluing process, thereby effectively reducing the fluctuation of the amount of glue on the roller surface caused by the change of liquid level when the first transfer roller rotates, thereby further improving the stability and reliability of the entire gluing system, thereby further improving the uniformity of the loose grid cloth gluing and the production quality of wood pulp grid paper.

[0032] Third, the present invention provides an online laying and gluing composite process system and method for wood pulp grid paper. By arranging the glue pressing roller in the sparse grid cloth gluing device on a lifting mechanism and arranging an ultrasonic water mist humidifying device next to the glue pressing roller, the sparse grid cloth gluing device can still ensure the humidity of the glue pressing roller surface when the glue pressing roller and the gluing roller are disengaged in a temporary shutdown state, thereby facilitating the immediate activation of the sparse grid cloth gluing device after a temporary shutdown, greatly reducing the maintenance workload of the sparse grid cloth gluing device, improving the efficiency of wood pulp grid paper production, and ensuring the production quality of wood pulp grid paper.

[0033] Fourthly, the online web-laying and gluing composite process system and method of the wood pulp grid paper of the present invention adopts a humidification method with a phase structure of an air knife and an ultrasonic water mist nozzle, thereby improving the humidification effect.

[0034] Fifth, the present invention provides an online web-laying and gluing laminating process system and method for wood pulp grid paper. The system comprises a closed steam heating device and an open steam heating device. These devices achieve high-temperature heating of the wood pulp grid paper after lamination. Upon exposure to air, the heated wood pulp grid paper rapidly evaporates its internal moisture, achieving rapid drying. The centralized heating using high-temperature steam offers high energy efficiency, effectively reducing energy consumption. Furthermore, the high-temperature steam heating time is short and does not damage the wood pulp grid paper, thereby improving its manufacturing quality. Furthermore, the closed steam heating device, because it abuts the laminating roller, also heats the laminating roller, thereby enhancing the laminating effect of the wood pulp grid paper.

[0035] Fifth, the online laying and gluing composite process system and method of the 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 increase the internal moisture dissipation rate of the wood pulp grid paper, thereby improving the drying effect of the wood pulp grid paper; on the other hand, it can enhance the wrinkle 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 laying and gluing composite process system and method for wood pulp grid paper. An online laying yarn disorder prevention device is provided on the online laying area. The yarns in the upper warp group and the lower warp group in the sparse grid cloth are guided by the upper warp separation roller and the lower warp separation roller respectively before entering the sparse grid cloth gluing device to separate the adjacent warps, thereby eliminating or greatly reducing the warp adhesion phenomenon caused by static electricity, thereby improving the online laying quality of the wood pulp grid paper sparse grid cloth, and further improving the manufacturing quality of the wood pulp grid paper.

[0037] Seventh, the present invention provides an online laying and gluing composite process system and method for wood pulp grid paper. The surfaces of the gluing roller, glue pressing roller, second transfer roller and warp wire separation roller of the online laying and yarn disorder prevention device are all provided with a conductive coating, and a conductive rod is provided in the gluing pool. Each of the conductive coatings and conductive rods is respectively connected to electricity, thereby eliminating or greatly reducing the static electricity when the yarn moves at high speed, thereby effectively avoiding the mutual adhesion of the yarns, thereby further improving the online laying quality of the wood pulp grid paper sparse mesh cloth.

[0038] Eighth, the present invention provides an online laying and gluing composite process system and method for wood pulp grid paper. In the online laying and yarn disorder prevention device, a synchronous airflow generator is arranged around the middle layer weft group. The combined force of the oblique airflows blown out by the upper air supply box and the lower air supply box can form a moving airflow around the middle layer weft group that is consistent with (same direction, equal size) or close to (consistent direction, close size) the moving speed of the middle layer weft group, thereby effectively avoiding the wefts in the middle layer weft group from being impacted by the air flow during high-speed movement, thereby greatly reducing the bending deformation of the wefts, thereby further improving the online laying quality of the wood pulp grid paper sparse mesh cloth.

[0039] Ninth, the present invention provides an online laying and gluing composite process system and method for wood pulp grid paper. The warp wire separation roller, anti-static power connection setting and synchronous airflow generator in the online laying and yarn disorder prevention device work together to make the grid formed by the warp and weft laying a rectangular grid with a relatively regular shape and uniform size, overcoming the disadvantages of easy grid deformation and inconsistent shape and size of each grid when traditionally using sparse grid finished cloth to make wood pulp grid paper.

[0040] Tenth, the present invention provides an online laying and gluing composite process system and method for wood pulp grid paper. The weft laying device utilizes the circulating motion of the synchronous transmission narrow belt on the synchronous transmission belt mechanism and the mutual coordination of the weft laying shuttle robot and the weft separation cutting knife to realize the continuous laying of the weft and improve the efficiency of online laying. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic flow chart of an online web-laying and gluing composite process system and method for wood pulp grid paper according to the present invention; Figure 2 This is a flow chart of the online web laying and gluing laminating process of the wood pulp grid paper production line; Figure 3 yes Figure 1 Schematic diagram of the structure of the weft laying shuttle robot; Figure 4 yes Figure 1 A schematic structural diagram of a scrim gluing device; Figure 5is Figure 1 Schematic diagram of the temporary shutdown maintenance structure set up on the scrim gluing device (the wood pulp grid paper production line is in operation); Figure 6 is Figure 1 Schematic diagram of the temporary shutdown maintenance structure set on the loose mesh gluing device (the wood pulp grid paper production line is in a temporary shutdown state); Figure 7 yes Figure 1 A schematic structural diagram of a paper hot pressing composite drying device; Figure 8 yes Figure 7 A partial enlarged view of Figure 9 yes Figure 7 A top view of the portion involving the paper storage area; Figure 10 yes Figure 1 A schematic structural diagram of an online web laying and yarn disorder prevention device; Figure 11 yes Figure 10 A partial enlarged view of Figure 12 yes Figure 10 Schematic diagram of the structure of the warp wire separation rollers (upper warp wire separation roller, lower warp wire separation roller).

[0042] In the figure: 100, online laying area, 110, online laying yarn disorder prevention device, 120, weft laying device, 121, synchronous transmission belt mechanism, 122, synchronous transmission wheel, 123, synchronous transmission narrow belt, 124, elastic draw hook, 125, weft laying shuttle robot, 126, weft separation cutting knife, 200, gluing area, 210, scrim gluing device, 300, laminating area, 310, hot pressing laminating drying device, 311, upper layer raw paper, 312, lower layer raw paper, 313, raw paper guide roller; In the figure: 1. Gluing roller, 2. Gluing roller, 3. Gluing tank, 4. First transfer roller, 5. Second transfer roller, 6. Cylindrical hygroscopic film, 7. First servo variable frequency motor, 8. Second servo variable frequency motor, 9. Film thickness gauge, 10. Control system, 11. Rigid roller, 12. Elastic rubber layer, 13. Lifting mechanism, 14. Frame, 15. Feeding pipe, 16. Online paving scrim, 17. Liquid level monitor, 18. Bridge plate, 19. Liquid level meter, 20. Liquid level dynamic stabilizer, 21. Servo electric push rod, 22. Fully enclosed volume sinking and floating tank; In the figure: 31, driving 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, driving wheel bracket, 40, reduction transmission 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 reduction motor, 48, driving gear, 49, passive gear.

[0043] In the figure: 51, composite pressing roller, 52, closed steam heating device, 53, closed 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 pressing roller, 59, lower composite pressing roller, 60, outlet guide roller, 61, rubber plate, 62, pressing roller tongue, 63, guide roller tongue, 64, strip sealing block, 65, open steam heating device, 66, steam heating box, 67, steam nozzle, 68, internal steam chamber, 69, paper storage area, 70, winding device, 71, front ventilation hood, 72, rear ventilation hood, 73, blower, 74, exhaust fan, 75, transverse cross flow wind generator, 76, wood pulp grid paper.

[0044] In the figure: 81, upper warp group, 82, middle weft group, 83, lower warp group, 84, upper warp wire separation roller, 85, lower warp wire separation roller, 86, annular wire separation groove, 87, V-shaped shape, 88, conductive rod, 89, synchronous air flow 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 DESCRIPTION

[0045] The following embodiments are further described in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0046] Example 1: Figures 1 to 12 The figure shows an embodiment of an online laying, gluing and laminating process system and method for wood pulp grid paper of this embodiment, which includes an online laying area 100, a gluing area 200 and a laminating area 300 arranged in sequence on a wood pulp grid paper production line according to the process flow of wood pulp grid paper production; The online laying area 100 is provided with an online laying yarn disorder prevention device 110 for preventing yarn disorder when the scrim of the wood pulp grid paper 76 is laid online. The online laying yarn disorder prevention device 110 includes an upper warp group 81, a middle weft group 82 and a lower warp group 83 for online laying to form the scrim 16 for online laying, and warp separation rollers (warp separation roller 84, warp separation roller 85) respectively arranged on the moving paths of the upper warp group 81 and the lower warp group 83; the warp separation rollers (warp separation roller 84, warp separation roller 85) It includes an upper warp dividing roller 84 that is in contact with the warps in the upper warp group 81, and a lower warp dividing roller 85 that is in contact with the warps in the lower warp group 83. The upper warp dividing roller 84 is arranged on a section of the path before the upper warp group 81 enters the loose mesh cloth gluing device 210, and the lower warp dividing roller 85 is arranged on a section of the path before the lower warp group 83 enters the loose mesh cloth gluing device 210; a number of annular dividing grooves 86 are spaced apart on the outer circle of the warp dividing rollers (warp dividing roller 84, warp dividing roller 85).

[0047] The upper warp thread group 81 is composed of a number of upper warp threads arranged at intervals, the middle weft thread group 82 is composed of a number of middle weft threads arranged at intervals, and the lower warp thread group 83 is composed of a number of lower warp threads arranged at intervals.

[0048] In the online laid scrim 16 of this embodiment, both the warp and weft threads are laid under a certain tension.

[0049] During operation, the warps in the upper warp group 81 and the lower warp group 83 are correspondingly abutted against the annular wire separation grooves 86 of the corresponding warp wire separation rollers (warp wire separation roller 84, warp wire separation roller 85), thereby preventing the warp from being disordered and achieving the effect of warp separation.

[0050] Preferably, the axial cross-section of the annular wire dividing groove 86 is V-shaped 87 .

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

[0052] In which, the gluing area 200 is provided with a loose mesh cloth gluing device 210 for gluing the yarns in the upper warp group 81, the middle weft group 82 and the lower warp group 83 that constitute the loose mesh cloth, and the loose mesh cloth gluing device 210 includes a gluing roller 1, a glue pressing roller 2 arranged above the gluing roller 1, a glue pool 3 arranged below the gluing roller 1, a first transfer roller 4 whose lower side of the roller surface is immersed in the glue pool 3, and a second transfer roller 5 arranged between the gluing roller 1 and the first transfer roller 4 and in contact with the gluing roller 1 and the first transfer roller 4 respectively; wherein, a layer of cylindrical hygroscopic film 6 is coated on the outer circle of the gluing roller 1; preferably, the cylindrical hygroscopic film 6 is a seamless cylindrical knitted fabric or a cylindrical non-woven fabric.

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

[0054] Preferably, the second transfer roller 5 is a rigid roller, and the second transfer roller 5 is driven to rotate by a second servo frequency conversion motor 8. A film thickness gauge 9 is provided on one side of the second transfer roller 5 for measuring the thickness of the film on the surface of the second transfer roller 5. The first servo frequency conversion motor 7, the second servo frequency conversion 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 means of the transfer rollers (the first transfer roller 4 and the second transfer roller 5) and the matching film thickness gauge 9, the glue coating thickness of the scrim can be precisely controlled, thereby further improving the glue coating uniformity of the scrim and the production quality of the wood pulp grid paper 76.

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

[0057] In this embodiment, a lifting mechanism 13 is provided above the pressing roller 2 , and the pressing roller 2 is arranged on the lifting mechanism 13 so as to achieve the up and down movement of the pressing 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 the improved structure of the sparse mesh gluing device for a wood pulp mesh paper production line of this embodiment, a frame 14 is further provided, 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 arranged on the frame 14.

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

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

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

[0063] When applying glue, the control system 10 controls the glue pressing roller 2 to move downward through the lifting mechanism 13 to press the online paving sparse mesh cloth 16 against the glue coating roller 1, and then starts the first servo frequency conversion motor 7 and the second servo frequency conversion motor 8, so that the glue coating roller 1 and the second transfer roller 5 rotate respectively. When the glue coating roller 1 rotates, it drives the online paving sparse mesh cloth 16 to move forward, and 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 aqueous liquid glue in the glue coating pool 3 onto the outer circle of its own roller body, and then transfers the aqueous liquid glue to the outer circle of the second transfer roller 5 through rotational contact with the second transfer roller 5. The second transfer roller 5 then transfers the aqueous liquid glue on its outer circle to the glue coating roller 1. Under the counterpressure of the glue pressing roller 2 and the glue coating roller 1, the glue is coated on the online paving sparse mesh cloth 16; as the online paving sparse mesh cloth 16 moves forward, continuous coating of the glue on the paving sparse mesh cloth is achieved.

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

[0065] Among them, the composite area 300 is provided with a hot pressing composite drying device 310 for hot pressing and laminating the upper and lower layers of raw paper and the middle layer of loose mesh cloth together and drying them. The hot pressing and laminating drying device 310 includes a pair of composite pressing rollers 51 for hot pressing and laminating the upper and lower layers of raw paper and the middle layer of loose mesh cloth together, and a closed steam heating device 52 arranged on the side of the wood pulp mesh paper discharge end of the pair of composite pressing 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 on the closed steam box 53 along the moving 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. The closed steam box 53 is respectively provided with steam supply pipes (not shown in the figure) corresponding to 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 pressing rollers 51 include an upper composite pressing roller 58 and a lower composite pressing roller 59; the outer box wall on the side of the wood pulp grid paper discharge end of the pair of composite pressing rollers 51 on the closed steam box 53 includes an upper outer box wall at the entrance above the wood pulp grid paper inlet slit 54 and a lower outer box wall at the entrance 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 pressing 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 pressing roller 59.

[0067] In this embodiment, the upper warp thread separation roller 84 is arranged on a section of the path before the upper warp thread group 81 enters the loose mesh cloth gluing device 210, and the lower warp thread separation roller 85 is arranged on a section of the path before the lower warp thread group 83 enters the loose mesh cloth gluing device 210.

[0068] In the online laying yarn disorder prevention device 110 of this embodiment, a synchronous airflow generator 89 is provided on the path where the middle layer weft group 82 enters the loose mesh cloth gluing device 210, which is used to form a moving airflow around the middle layer weft 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 group 82; the synchronous airflow generator 89 includes an upper air supply box 90 and a lower air supply box 91 arranged in an upper and lower position, and the upper air supply box 90 is located in the middle layer. The lower air supply box 91 is located above the latitude group 82, and the lower air supply box 91 is located below the middle-layer latitude group 82. Upper air supply holes 92 that blow obliquely toward the middle-layer latitude group 82 in the direction of movement of the middle-layer latitude group 82 are densely arranged on the bottom end surface of the upper air supply box 90, and lower air supply holes 93 that blow obliquely toward the middle-layer latitude group 82 in the direction of movement of the middle-layer latitude group 82 are densely arranged on the top end surface of the lower air supply box 91; 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 distributed air supply holes (upper air supply holes 92, lower air supply holes 93) can also be replaced by spaced air supply slits, and the air supply slits are parallel to or basically consistent with the wefts in the middle layer weft group 82, and the direction of the air flow blown out by the air supply slits is still oblique.

[0070] Preferably, the synchronous airflow generator 89 is arranged at a position close to the loose mesh gluing device 210.

[0071] Preferably, an anemometer 95 is provided on the synchronous airflow generator 89 near one end of the scrim gluing device 210 ; the air supply system 94 and the anemometer 95 are respectively connected to the control system 10 of the wood pulp grid paper production line.

[0072] Preferably, the anemometer 95 includes a constant current wire that is electrically heated and a detection 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 above-mentioned anemometer 95 is: the air flow rate will change the heat dissipation rate of the constant current wire, and then change the temperature of the constant current wire. The change in temperature 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 air flow velocity around the middle-layer weft group 82 through the anemometer 95, and determines whether the air flow velocity is the same as or close to the moving speed of the middle-layer weft group 82; when there is a deviation, the air supply speed of the air supply system 94 is adjusted so that the air flow velocity is consistent with or close to the moving speed of the middle-layer weft group 82, thereby eliminating or greatly reducing the airflow impact on the middle-layer weft group 82 when it moves at high speed, and thereby eliminating or slowing down the bending deformation of the weft.

[0075] Preferably, the wood pulp grid paper production line is further provided with an ambient temperature sensor 96, which is mounted 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 sensor 96 measures the ambient temperature around the middle weft thread group 82, enabling ambient temperature compensation during measurement by the anemometer 95, thereby increasing the accuracy of the air velocity data measured by the anemometer 95.

[0076] In this embodiment, the surfaces of the glue coating roller 1 and the glue pressing roller 2 of the loose mesh cloth glue coating device 210 are both provided with a layer of conductive coating, and the conductive coatings of the glue coating roller 1 and the glue pressing roller 2 are externally connected to a low-voltage power supply; a pair of conductive rods 88 are inserted into the glue coating pool 3, and a low-voltage power supply is externally connected between the pair of conductive rods 88; the transfer rollers (first transfer roller 4, second transfer roller 5) include a first transfer roller 4 whose lower side is immersed in the glue coating pool 3, and a second transfer roller 5 arranged between the glue coating roller 1 and the first transfer roller 4 and in contact with the glue coating roller 1 and the first transfer roller 4 respectively, the surface of the second transfer roller 5 is provided with a layer of conductive coating, 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 cloth gluing device 210, a liquid level monitor 17 for monitoring the liquid level of the glue in the glue pool 3 is also provided on the glue pool 3. The liquid level monitor 17 includes a bridge plate 18 arranged on one side of the upper end of the glue pool 3 and a liquid level meter 19 arranged on the bridge plate 18. The liquid level monitoring probe of the liquid level meter 19 points downward to the glue pool 3. The liquid level meter 19 is connected to the control system 10 of the wood pulp grid paper production line.

[0078] As a further improvement, the sparse mesh cloth gluing device 210 of this embodiment is also provided with a liquid level dynamic stabilizer 20 for reducing the glue liquid level in the gluing pool 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 buoyancy box 22 arranged at the lower end of the telescopic rod of the servo electric push rod 21 and whose outer shape occupies a certain volume. The fully enclosed volume buoyancy box 22 is partially immersed in the gluing pool 3, and the servo electric push rod 21 is connected to the control system 10 of the wood pulp grid paper production line.

[0079] Preferably, the volume of the fully enclosed volume sinking and floating box 22 is 1 / 10 to 1 / 5 of the volume of the glue liquid in the glue coating pool 3 .

[0080] The working principle of the above-mentioned liquid level dynamic stabilizer 20 is as follows: the control system 10 monitors whether the liquid level of the glue liquid in the glue coating tank 3 fluctuates through the liquid level monitor 17. When the liquid level fluctuates and exceeds a predetermined threshold, the control system drives the telescopic rod of the servo electric push rod 21 to move, so that the fully enclosed volume sinking and floating box 22 rises or falls, thereby achieving the purpose of maintaining and stabilizing the constant liquid level in the glue coating tank 3. For example, when the liquid level of the glue liquid in the glue coating tank 3 is lower than the set value, the fully enclosed volume sinking and floating box 22 moves downward, so that the fully enclosed volume sinking and floating box 22 occupies more space of the glue liquid in the glue coating tank 3, thereby raising the liquid level of the glue liquid in the glue coating tank 3 to the set value; when the liquid level of the glue liquid in the glue coating tank 3 is higher than the set value, the fully enclosed volume sinking and floating box 22 rises, so that the fully enclosed volume sinking and floating box 22 occupies less space of the glue liquid in the glue coating tank 3, thereby lowering the liquid level of the glue liquid in the glue coating tank 3 to the set value.

[0081] Preferably, a pair of outlet guide rollers 60 arranged in the up and down directions for guiding the moving direction of the wood pulp grid paper 76 are provided on the closed steam box 53 near the wood pulp grid paper outlet slit 55. After the wood pulp grid paper 76 comes out of the wood pulp grid paper outlet slit 55, it is led out from between the pair of outlet guide rollers 60; a rubber plate 61 is provided on the outer box wall of the closed steam box 53 near the side of the wood pulp grid paper outlet slit 55, and the pair of outlet guide rollers 60 are respectively abutted against the rubber plate 61.

[0082] Preferably, pressure roller tongues 62 extending toward the pressing part of the pair of composite pressure rollers 51 are respectively provided on the outer box walls on the front and rear sides of the closed steam box 53 near the wood pulp grid paper inlet slit 54, and the shapes of the extending ends of the pressure roller tongues 62 are respectively adapted to the outer circular shapes of the pair of composite pressure rollers 51.

[0083] Preferably, guide roller tongues 63 extending toward the pressing part of the pair of outlet guide rollers 60 are respectively provided on the outer box walls on the front and rear sides of the closed steam box 53 near the wood pulp grid paper outlet slit 55, and the shapes of the extending ends of the guide roller tongues 63 are respectively adapted to the outer circular shapes of the pair of outlet guide rollers 63.

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

[0085] Preferably, a pair of strip sealing blocks 64 with an L-shaped cross-section are fixed to the outer box walls on 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 roller 51.

[0086] Preferably, an open steam heating device 65 is further provided on the side of the wood pulp grid paper discharge end of the pair of outlet guide rollers 60, and the open steam heating device 65 includes a pair of steam heating boxes 66 arranged in the up and down directions. The wood pulp grid paper 76 is led out from between the pair of outlet guide rollers 60 and enters between the pair of steam heating boxes 66. The pair of steam heating boxes 66 are densely covered with steam spray holes 67 on one side facing the wood pulp grid paper 76, and the internal steam chambers 68 of the pair of steam heating boxes 66 are respectively connected to the steam supply pipe (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 is rolled up by the rolling device 70 .

[0088] As a further improvement of this embodiment, the paper storage area 69 is an open paper storage area, and a transverse cross-flow wind generator 75 for enhancing the drying effect of the wood pulp grid paper 76 is arranged on the open paper storage area 69. The transverse cross-flow wind generator 75 includes a front ventilation hood 71 and a rear ventilation hood 72 respectively arranged at the front and rear sides of the open paper storage area 69 for accelerating the ventilation of the wood pulp grid paper 76 along the front and rear directions, and a number of blowers 73 for supplying air to 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 exhausting air from the paper storage area 69 are arranged in an array on the cover of the rear ventilation hood 72.

[0089] The above-mentioned transverse cross-flow wind generator 75 makes full use of the space of the open paper storage area 69. While meeting the winding buffer requirements of the wood pulp grid paper 76, relying on the serpentine arrangement and zigzag advance characteristics of the wood pulp grid paper 76 on the paper storage area 69, the generated high-speed transverse cross-flow wind can fully contact the wood pulp grid paper 76 and take away its internal moisture, thereby further improving the drying effect.

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

[0091] As a further improvement, the sparse mesh cloth gluing device 210 of this embodiment is also provided with a temporary shutdown maintenance structure, which includes a glue pressing roller 2 arranged above the glue coating roller 1 through a lifting mechanism 13, a driving wheel 31 arranged on one side above the glue pressing roller 2 for abutting against the glue pressing roller 2 after the glue pressing roller 2 moves up, a wind knife 32 arranged parallel to the glue pressing roller 2 for approaching the glue pressing roller 2 after the glue pressing roller 2 moves up, an ultrasonic water mist nozzle 33 arranged inside the wind knife 32, and an ultrasonic water mist generator 34 connected to the ultrasonic water mist nozzle 33, and the air outlet of the wind knife 32 faces the roller surface of the glue pressing roller 2.

[0092] In this embodiment, a frame 14 is provided on the scrim gluing 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 downwardly on the top of the frame 14, a lifting plate 36 arranged on the guide columns 35 and moving in the up and down directions, a lifting cylinder 37 connected between the top of the frame 14 and the lifting plate 36, and a pair of supports 38 arranged on the front and rear sides of the lifting plate 36. The two ends of the rubber pressing roller 2 are rotatably arranged on the pair of supports 38 through rolling bearings.

[0094] Preferably, a driving wheel bracket 39 is connected to the frame 14 , and the driving wheel 31 is rotatably arranged on the driving wheel bracket 39 and realizes the rotation of the driving wheel 31 through a transmission connection with a 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 inside the air knife 32 along the axial direction parallel to the rubber pressing roller 2 .

[0096] Preferably, a wind knife bracket 41 is further provided on the frame 14 , and the wind knife 32 is fixed on the wind knife bracket 41 .

[0097] In order to improve the effect of spray humidification, a V-shaped diffusion port 42 is provided on the air outlet of the air knife 32 .

[0098] As a further improvement, a temporary shutdown maintenance structure of a gluing device in this embodiment is also provided with a water drop collector 43 to prevent water droplets from falling directly onto the lower gluing roller 1. The water drop collector 43 includes a pair of rotating arms 44 arranged along the front and rear sides and an arc-shaped water drop 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 arranged on the front and rear end shaft heads of the glue pressing roller 2. The bottom of the arc-shaped water drop collection box 45 is respectively provided with a drainage port 46 at the end along the front and rear directions. The drainage port 46 is connected to a drainage pipe (not shown in the figure) extending toward the outside of the front and rear ends; a servo reduction motor 47 for driving the rotating arm 44 to rotate around the two end shaft heads of the glue pressing roller 2 is also provided on the support 38, and a driving gear 48 is provided on the output shaft of the servo reduction motor 47. A driven gear 49 is provided on the end of the rotating arm 44 close to the shaft head of the glue pressing roller 2, and the driving gear 48 is meshed with the driven gear 49.

[0099] By setting a water drop collector 43 in the temporary shutdown maintenance structure of the loose mesh cloth gluing device 210, the water droplets generated by humidification for a longer period of time can be collected by the water drop collector 43 and directly fall into the gluing pool 3 or be discharged to the outside of the gluing pool 3, so as not to have an adverse effect on the gluing 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 sparse mesh gluing device 210 is first actuated, thereby driving the glue roller 2 to rise and disengage from the glue coating roller 1, and at the same time abut against the driving wheel 31 on the upper side of the glue roller 2; after the glue roller 2 abuts against the driving wheel 31, it realizes synchronous rotation driven by the rotation of the driving 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 shaft head at both ends of the glue roller 2 through gear transmission, thereby The arc-shaped water droplet collecting box 45 rotates to the position below the glue pressing roller 2. After reaching the position, the wind knife 32 and the ultrasonic water mist nozzle 33 are turned on, and the ultrasonic water mist coming out of the wind knife 32 is sprayed onto the roller surface of the glue pressing roller 2, thereby achieving a moisturizing effect on the surface of the glue pressing roller 2. During the moisturizing process, excess water droplets on the surface of the glue pressing roller 2 are discharged from the drain pipe of the arc-shaped water droplet collecting box 45. The water droplets discharged from the pipe mouth of the drain pipe avoid the glue coating roller 1 below and the sparse mesh cloth 16 laid online and directly fall into the glue coating pool 3 or are discharged to the outside of the glue coating pool 3.

[0101] In this embodiment, a transfer roller is provided on the glue pool 3, and the aqueous glue in the glue pool 3 is transferred to the glue roller 1 through the transfer roller. During a temporary shutdown, the transfer roller on the lower glue pool 3 and the glue roller 1 continue to rotate, thereby ensuring that the surfaces of the transfer roller and the glue roller 1 are kept moist with glue even during a temporary shutdown, without the need for special cleaning and maintenance, thereby ensuring that production can continue after the shutdown.

[0102] When the sparse mesh cloth gluing device 210 works again after being temporarily stopped, first, the servo reduction motor 47 drives the rotating arm 44 to rotate upward around the central axis of the shaft heads at both ends of the glue pressing roller 2 through gear transmission, thereby rotating the arc-shaped water droplet collection box 45 to one side of the glue pressing roller 2; then the lifting mechanism 13 is actuated, thereby driving the glue pressing roller 2 to descend and press relative to the glue coating roller 1, pressing the online paved sparse mesh cloth 16 between the glue pressing roller 2 and the glue coating roller 1, and after it is in place, the sparse mesh cloth gluing device 210 is turned on to perform the gluing 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 movement 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 warps unwound from the upper warp unwinding device and the lower warp unwinding device reach the online laying area 100, they are guided and separated by the warp separation rollers to form the upper warp group 81 and the lower warp group 83 in the online laying area 100.

[0105] In this embodiment, a weft laying device 120 is also provided, and the weft laying device 120 includes a pair of synchronous transmission belt mechanisms 121 arranged separately according to front and rear positions, and each of the synchronous transmission belt mechanisms 121 includes a pair of synchronous transmission wheels 122 arranged along the left and right directions, and a synchronous transmission narrow belt 123 connected between the pair of synchronous transmission wheels 122, and elastic hooks 124 for fixing the wefts are evenly arranged on the synchronous transmission narrow belt 123 according to the spacing of the wefts; a weft laying shuttle robot 125 is also provided above the pair of synchronous transmission belt mechanisms 121, and the weft laying shuttle robot 125 is connected to the middle-layer weft unwinding device (not shown in the figure), and a group of wefts released from the middle-layer weft unwinding device are fixed between the elastic hooks 124 on the front and rear sides of the synchronous transmission narrow belts 123 through the weft laying shuttle robot 125, thereby forming the middle-layer weft group 82.

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

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

[0108] In order to achieve continuous online laying of the online laid scrim 16 and continuous compounding of the online laid scrim 16 with the upper and lower layers of raw paper (upper layer raw paper 311, lower layer raw paper 312) after gluing, the scrim gluing device 210 and the hot pressing compound drying device 310 are arranged in the front-to-back direction between the pair of synchronous transmission belt mechanisms 121 arranged in the front-to-back direction, and are located between the pair of synchronous transmission wheels 122 in the left-to-right direction, and a weft separation cutting knife 126 is provided at the synchronous wheel located in the front of the pair of synchronous transmission wheels 122. The online laid scrim 16 enters the scrim gluing device 210 for gluing. The glued online laid scrim 16 is meshed with the upper and lower layers of raw paper (upper layer raw paper 311, lower layer raw paper 312) and then enters the hot pressing composite drying device 310 for hot pressing composite drying to form wood pulp grid paper 76. When the wood pulp grid paper 76 coming out of the hot pressing composite drying device 310 moves forward to the synchronous transmission wheel 122, the terminals at both ends of the weft connected to the elastic hook 124 are respectively disconnected by the weft separation cutting knife 126 located at the synchronous transmission wheel 122, so that the weft is separated from the synchronous transmission narrow belt 123, so that the middle layer weft group 82 that has been composited between the upper and lower layers of raw paper (upper layer raw paper 311, lower layer raw paper 312) can continue to move forward, which is convenient for the subsequent continuous winding of the wood pulp grid paper 76.

[0109] In this embodiment, elastic hooks 124 are provided on the synchronous transmission narrow belt 123 to provide a certain tension on the weft. However, to prevent thinner wefts from being broken, the weft tension should be set relatively low. Considering the impact of airflow, the high-speed moving weft with low tension may bend slightly before entering the synchronous airflow generator 89. However, after entering the synchronous airflow generator 89, the weft will return to a straightened state under the elastic tension of the elastic hooks 124 due to the reduction or elimination of airflow impact, thereby ensuring that the yarn mesh of the online-laid scrim 16 has a relatively regular rectangular mesh when it is laminated.

[0110] Example 2: An online web gluing and laminating method of an online web gluing and laminating process system for wood pulp grid paper, comprising the following steps: (1) Online laying: The yarns in the upper warp group 81, the middle weft group 82 and the lower warp group 83 in the online laying area 100 are moved forward respectively and enter between the glue coating roller 1 and the glue pressing roller 2 of the scrim glue coating device 210 in the glue coating area 200, so that the upper warp group 81, the middle weft group 82 and the lower warp group 83 are laid in the upper, middle and lower positions, completing the online laying operation; (2) Gluing: The scrim gluing device 210 located in the gluing area 200 transfers the water-based glue in the glue pool 3 to the glue roller 1 through the transfer rollers (the first transfer roller 4 and the second transfer roller 5). The water-based glue transferred to the glue roller 1 comes into contact with the yarns of the online-laid scrim 16 that enters between the glue roller 1 and the glue pressing roller 2, thereby coating the water-based glue on the yarns in the upper warp group 81, the middle weft group 82 and the lower warp group 83, completing the gluing operation. Under the action of the mutual pressure and heating of the hot glue pressing roller 2 and the glue roller 1, the yarns in the upper warp group 81, the middle weft group 82 and the lower warp group 83 after gluing are hot-melt-bonded at the vertical and horizontal intersections to form the online-laid scrim 16 with water-based glue on the surface. (3) Compounding: The online laid scrim 16 coming out of the scrim gluing device 210 continues to move forward and enters between a pair of hot compounding rollers (upper compounding roller 58 and lower compounding roller 59) in the hot pressing compounding drying device 310 together with the upper raw paper 311 above it and the lower raw paper 312 below it, and is hot-melt bonded to form a wood pulp grid paper 76; (4) Drying: The wood pulp grid paper 76 coming out from between a pair of hot composite pressing rollers (upper composite pressing roller 58 and lower composite pressing roller 59) enters the closed steam heating device 52 for high-temperature steam heating. After the wood pulp grid paper 76 heated by high-temperature steam comes out of the closed steam heating device 52, its moisture evaporates rapidly at high temperature, thereby achieving the primary 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, achieving the secondary drying of the wood pulp grid paper 76; then it is rolled up after ventilation drying at normal temperature.

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

[0112] Preferably, the room temperature ventilation drying of the wood pulp grid paper 76 is carried out in the open paper storage area 69 , and the ventilation speed is accelerated by the transverse cross-flow wind generator 75 provided in front and behind the open paper storage area 69 , thereby further improving the drying effect of the wood pulp grid paper 76 .

[0113] As a further improvement of the online web gluing and compounding method of the online web gluing and compounding process system of a wood pulp grid paper of the present embodiment, during the online web gluing and compounding process, the low-voltage power supply is turned on for anti-static treatment to prevent the adhesion of the sand line; the synchronous airflow generator 89 is also turned on to make the airflow movement speed around the middle layer weft group 82 consistent with or close to the movement speed of the middle layer weft group 82, thereby eliminating or reducing the airflow impact on the wefts in the middle layer weft group 82 during high-speed movement, and further eliminating or reducing the bending deformation of the wefts; when the wood pulp grid paper production line is temporarily shut down, the glue roller 2 is moved up by the lifting mechanism 13 to disengage from the glue roller 1 , keep the transfer rollers (first transfer roller 4, second transfer roller 5) and the glue coating roller 1 of the loose mesh cloth gluing device 210 continuing to rotate, and at the same time activate the temporary shutdown maintenance structure on the loose mesh cloth gluing device 210, and perform ultrasonic water mist humidification on the glue pressing roller 2 after it moves up, so as to ensure that the transfer rollers (first transfer roller 4, second transfer roller 5) and the glue coating roller 1 in the temporary shutdown state are wetted by the glue liquid on the surface, and at the same time, the surface of the glue pressing roller 2 can maintain a certain humidity, thereby ensuring that there is no need to perform special cleaning and maintenance on the transfer rollers (first transfer roller 4, second transfer roller 5), the glue coating roller 1 and the glue pressing roller 2 after the shutdown, so that production can be carried out immediately after the shutdown.

[0114] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for gluing wood pulp grid paper on-line, characterized in that: It comprises an online laying yarn disorder prevention device which is arranged before the loose mesh cloth gluing device according to the process of online laying and gluing of wood pulp mesh paper; the online laying yarn disorder prevention device comprises an upper warp group, a middle weft group and a lower warp group for online laying to form a loose mesh cloth, and warp wire separation rollers which are respectively arranged on the moving paths of the upper warp group and the lower warp group; the warp wire separation rollers comprise an upper warp wire separation roller which is in contact with the warps in the upper warp group and a lower warp wire separation roller which is in contact with the warps in the lower warp group, and a number of annular wire separation grooves are spaced apart on the outer circle of the warp wire separation rollers; a synchronous airflow generator which is used to form a moving airflow around the middle weft group and the moving speed of the moving airflow is the same as or close to the moving speed of the middle weft group is arranged on the path where the middle weft group enters the loose mesh cloth gluing device.

2. The device for gluing wood pulp grid paper online according to claim 1, characterized in that: The synchronous airflow generator includes an upper air supply box and a lower air supply box arranged in an upper and lower position, the upper air supply box is located above the middle-layer latitude line group, and the lower air supply box is located below the middle-layer latitude line group. Upper air supply holes that blow obliquely toward the middle-layer latitude line group in the moving direction of the middle-layer latitude line group are densely arranged on the bottom end surface of the upper air supply box, and lower air supply holes that blow obliquely toward the middle-layer latitude line group in the moving direction of the middle-layer latitude line group are densely arranged on the top end surface of the lower air supply box.

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

4. The device for gluing wood pulp grid paper online according to claim 3, characterized in that: An anemometer is arranged on the synchronous airflow generator near one end of the scrim gluing device.

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

6. The device for gluing wood pulp grid paper online according to claim 1, characterized in that: The loose mesh cloth gluing device includes a gluing roller, a gluing roller arranged above the gluing roller, a gluing pool arranged below the gluing roller, a first transfer roller whose lower side of the roller surface is immersed in the gluing pool, and a second transfer roller arranged between the gluing roller and the first transfer roller and in contact with the gluing roller and the first transfer roller respectively; wherein a cylindrical hygroscopic film is coated on the outer circle of the gluing roller.

7. The device for gluing wood pulp grid paper online according to claim 6, characterized in that: The loose mesh cloth gluing device is provided with a temporary shutdown maintenance structure, which includes a glue pressing roller arranged above the glue coating roller through a lifting mechanism, a driving wheel arranged on one side above the glue pressing roller for abutting against the glue pressing roller after the glue pressing roller moves up, a wind knife arranged parallel to the glue pressing roller for approaching the glue pressing roller after the glue pressing roller moves up, an ultrasonic water mist nozzle arranged inside the wind knife, and an ultrasonic water mist generator connected to the ultrasonic water mist nozzle, and the air outlet of the wind knife faces the roller surface of the glue pressing roller.

8. The device for gluing wood pulp grid paper online according to claim 7, characterized in that: When the wood pulp grid paper production line is temporarily shut down, the glue pressing roller is moved up by the lifting mechanism to disengage from the glue coating roller, so that the transfer roller and the glue coating roller of the loose mesh cloth gluing device continue to rotate, and the temporary shutdown maintenance structure on the loose mesh cloth gluing device is activated, and the glue pressing roller after moving up is humidified with ultrasonic water mist, so as to ensure that the glue on the surface of the transfer roller and the glue coating roller in the temporary shutdown state is moistened, and at the same time, the surface of the glue pressing roller can maintain a certain humidity, so as to ensure that there is no need for special cleaning and maintenance of the transfer roller, the glue coating roller and the glue pressing roller after the shutdown, so that production can be carried out immediately after the shutdown.

9. A device for gluing wood pulp grid paper on-line, characterized in that: The invention comprises a sparse mesh cloth gluing device which is arranged after the online web laying anti-yarn tangle device according to the process of online web gluing of wood pulp mesh paper; the sparse mesh cloth gluing device comprises a gluing roller, a glue pressing roller arranged above the gluing roller, a glue pool arranged below the gluing roller, a first transfer roller whose lower side of the roller surface is immersed in the glue pool, and a second transfer roller arranged between the gluing roller and the first transfer roller and respectively in contact with the gluing roller and the first transfer roller; a temporary shutdown maintenance structure is arranged on the sparse mesh cloth gluing device, and the temporary shutdown maintenance structure comprises a glue pressing roller arranged above the gluing roller through a lifting mechanism, a driving wheel arranged on one side above the glue pressing roller for abutting against the glue pressing roller after the glue pressing roller moves up, a wind knife arranged parallel to the glue pressing roller for being close to the glue pressing roller after the glue pressing roller moves up, an ultrasonic water mist nozzle arranged inside the wind knife, and an ultrasonic water mist generator connected to the ultrasonic water mist nozzle, and the air outlet of the wind knife faces the roller surface of the glue pressing roller.

10. The device for gluing wood pulp grid paper online according to claim 9, characterized in that: When the wood pulp grid paper production line is temporarily shut down, the glue pressing roller is moved up by the lifting mechanism to disengage from the glue coating roller, so that the transfer roller and the glue coating roller of the loose mesh cloth gluing device continue to rotate, and the temporary shutdown maintenance structure on the loose mesh cloth gluing device is activated, and the glue pressing roller after moving up is humidified with ultrasonic water mist, so as to ensure that the glue on the surface of the transfer roller and the glue coating roller in the temporary shutdown state is moistened, and at the same time, the surface of the glue pressing roller can maintain a certain humidity, so as to ensure that there is no need for special cleaning and maintenance of the transfer roller, the glue coating roller and the glue pressing roller after the shutdown, so that production can be carried out immediately after the shutdown.

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