Paper Web Manufacturing Apparatus Having a Touch Roller Pressing Structure for Improving Drying Efficiency

Abstract

The present invention relates to a papermaking device having a touch roller pressure structure for improving paper quality, wherein, unlike conventional drying methods in which paper passes through a single dryer section without separate pressure, a touch roller capable of applying pressure is placed on the side of the drum of the single dryer section to apply pressure to the paper in a lateral direction, thereby improving paper quality and enhancing the efficiency of the drying process, and thereby maximizing convenience of use or efficiency due to ease of handling, use, maintenance, and repair resulting from a structure differentiated from existing ones. The device comprises: a single dryer section (100) that receives a paper that has undergone natural dehydration and pressure dehydration along a set transport distance and evaporates and discharges moisture contained in the paper through a cylinder capable of heating or suction; and a Yankee dryer unit (200) that provides a transport path for the paper transported from the single dryer section, pressures and fixes the paper, and evaporates moisture contained in the paper through thermal energy and hot air emitted from the outer surface. The papermaking device is based on a double dryer (300) that conveys and dries paper by rotation by bringing both sides of the paper transferred from the Yankee dryer unit into contact with a heated cylinder, and is characterized by including a touch roller (400) that is positioned on the side of the single dryer unit (100) and pressurizes the paper by selectively contacting one side of the drum of the single dryer unit to improve dewatering efficiency and drying efficiency.

Description

Technology Field

[0001] The present invention relates to a papermaking apparatus comprising a single dryer unit, a Yankee dryer unit, and a double dryer for drying paper sheets that have undergone natural dehydration and pressurized dehydration. More specifically, unlike conventional drying methods in which paper sheets proceed without separate pressurization while passing through the single dryer unit, the invention relates to a papermaking apparatus having a touch roller pressurization structure for improving paper quality, wherein a touch roller capable of applying pressure is positioned on the side of the drum of the single dryer unit to apply pressure to the paper sheets in a lateral direction, thereby improving paper quality and enhancing the efficiency of the drying process. This structure is differentiated from existing methods, thereby maximizing convenience of use and efficiency through ease of handling, use, maintenance, and repair. Background Technology

[0003] Typically, the drying step in the papermaking process is a critical process that determines the physical properties, dimensional stability, and surface quality of the final product following paper sheet formation, and it directly affects the strength, density, pliability, and shrinkage characteristics of the paper. In particular, the process of removing moisture from wet paper sheets goes beyond simple moisture evaporation and plays an important role in the formation of inter-fiber bonding structures and the densification of the internal structure of the paper.

[0005] Early paper drying technology primarily involved contacting a wet paper sheet with the surface of a heated cylinder roll without separate pressure to evaporate moisture through heat conduction. While this method had the advantages of a simple structure and easy equipment configuration, free shrinkage of the paper sheet occurred during the drying process, leading to reduced dimensional stability. Furthermore, the insufficient formation of bonding forces between fibers limited the improvement of paper strength. Prior art literature

[0007] Registered Patent Publication No. 10-0744710 "Method for manufacturing high-quality crepe paper" Published Patent Publication No. 10-2020-0117348 "Apparatus for manufacturing toilet paper with reduced tearing" The problem to be solved

[0008] The present invention was created to more actively resolve the aforementioned problems, and the main objective is to provide a papermaking device capable of improving the strength, density, and surface quality of paper by effectively suppressing paper shrinkage and strengthening fiber bonding during the drying stage of the papermaking process, while simultaneously improving drying efficiency and energy utilization efficiency.

[0010] In addition, another problem to be solved is to provide a structure that can maximize the pressure per unit area even under the same linear pressure conditions by providing a touch roller that selectively contacts the side of the drum of a single dryer section through which the paper passes during the initial stage of the drying process to apply pressure to the paper, thereby locally limiting the contact area between the paper and the drum.

[0012] In addition, the present invention addresses another problem by configuring the touch roller to selectively contact one side of the drum of the single dryer unit, thereby allowing high pressure and heat to be applied simultaneously to the paper during the initial drying stage, which suppresses shrinkage of the paper and promotes bonding between fibers, thereby improving the mechanical strength of the paper.

[0014] In addition, the present invention has another objective of providing a papermaking device capable of finely controlling the pressure according to changes in the state of the paper by installing a touch roller so as to be rotatable with respect to a frame, thereby allowing the contact with the drum of the single dryer unit or the degree of pressure to be selectively adjusted.

[0016] In addition, the present invention has another objective of providing a structure that can stably maintain the contact state between the paper and the drum and prevent damage to the paper while ensuring drying efficiency by configuring the pressure position and pressure angle through the rotational structure of the touch roller. means of solving the problem

[0018] To achieve the above-mentioned problem, the configuration of a papermaking device having a touch roller pressure structure for improving paper quality proposed in the present invention is as follows.

[0020] The present invention relates to a paper manufacturing apparatus comprising: a single dryer unit (100) that receives a paper sheet, which has undergone natural dehydration and pressurized dehydration along a set transport distance, and evaporates and discharges moisture contained in the paper sheet through a cylinder capable of heating or suction; a Yankee dryer unit (200) that provides a transport path for the paper sheet transported from the single dryer unit, pressurizes and fixes the paper sheet, and evaporates moisture contained in the paper sheet through thermal energy and hot air emitted from an outer surface; and a double dryer (300) that transports and dries the paper sheet by rotation by ensuring that both sides of the paper sheet transported from the Yankee dryer unit come into contact with a heated cylinder. In particular, the apparatus is characterized by comprising a touch roller (400) that is positioned on the side of the single dryer unit (100) and pressurizes the paper sheet by selectively contacting one side of the drum of the single dryer unit to improve dehydration efficiency and drying efficiency.

[0022] Additionally, the touch roller (400) comprises: a main frame (410) fixedly installed on a frame (10) in which a single dryer unit (100) and a Yankee dryer unit (200) are installed; a housing (420) coupled to the front end of the main frame; and a pressure drum (430) rotatably coupled to the housing and pressurizing the paper while contacting the outer surface of the drum of the single dryer unit.

[0024] Additionally, the touch roller (400) is installed to be rotatable with respect to the frame (10) and configured so that the contact with the drum of the single dryer unit (100) or the degree of pressure is selectively adjusted, thereby including fine adjustment of the pressure force according to the condition of the paper.

[0026] Additionally, the touch roller (400) includes a lower end of the main frame (410) that is hinged to the frame (10), an upper end of the main frame that is coupled to the rod of a driving cylinder (S) coupled to the frame, and the rotation angle and pressure position are controlled by the main frame rotating according to the withdrawal and retraction operation of the cylinder rod.

[0028] Meanwhile, the present invention may further include the following features.

[0029] First, the touch roller (400) comprises: a sensing unit (1) installed on a frame (10) for detecting at least one of the type, thickness, or moisture content of the paper supplied to a single dryer unit (100); an AI analysis unit (2) for analyzing the paper information obtained through the sensing unit; and a control unit (3) for controlling whether the touch roller rotates or the rotation angle according to the analysis result of the AI ​​analysis unit.

[0031] Additionally, the AI ​​analysis unit (2) is configured to calculate a pressure condition optimized for the paper using at least one of the moisture content, conveying speed, drying history, or target paper quality of the paper as an analysis standard or learning data, and to adjust the rotation angle or pressure of the touch roller (400) in real time according to the calculated pressure condition.

[0033] In addition, the control unit (3) is configured to maximize dewatering efficiency while preventing damage to the paper by dynamically correcting the pressure conditions by reflecting the change in the state of the paper in real time even during the pressure operation of the touch roller (400). Effects of the invention

[0035] According to the present invention, which is configured as described above, a touch roller is placed on the side of the drum of a single dryer unit during the drying stage of a paper manufacturing process to selectively press the paper sheet, thereby locally forming a contact area between the paper sheet and the drum. Accordingly, even under the same linear pressure conditions, the pressing force per unit area is effectively increased, thereby promoting the discharge of moisture remaining inside the paper sheet during the initial drying stage and achieving the effect of suppressing shrinkage of the paper sheet.

[0037] Furthermore, the present invention is configured such that high pressure and heat are simultaneously applied to the paper during the shearing phase of the drying process, thereby increasing the frequency of contact and bonding strength between fibers and consequently providing the effect of improving the tensile strength, density, and structural stability of the paper. This enables the achievement of paper strength improvement effects within a relatively short contact time, which were difficult to sufficiently secure in conventional large cylinder-centered drying methods.

[0039] In addition, since the touch roller is installed to rotate relative to the frame, the contact with the drum of the single dryer unit or the degree of pressure can be selectively adjusted according to process conditions. Accordingly, it can flexibly respond to changes in the type, thickness, moisture content, or production speed of the paper, thereby providing another effect of stably producing paper of various specifications in the same equipment.

[0041] In addition, the present invention has another effect of improving overall production stability by reducing breakage, wrinkling, or quality deviations that may occur during the drying process through a structure capable of controlling the rotation angle and pressure position of the touch roller, thereby stably maintaining the contact state between the paper and the drum and effectively preventing damage to the paper caused by excessive local pressure or uneven contact.

[0043] In addition, since the present invention can be implemented by adding a touch roller pressurization structure while maintaining the basic structure of the existing single dryer unit, Yankee dryer unit, and double dryer, it can be applied without large-scale modifications to existing papermaking equipment. Accordingly, not only can equipment investment costs be reduced, but the effect of reducing energy consumption by improving drying efficiency compared to existing processes can also be expected.

[0045] Consequently, the present invention provides the effect of effectively utilizing high pressure and heat in the upstream stage of the drying process and simultaneous improvement of drying efficiency and product quality throughout paper manufacturing through a division of roles with the downstream drying process, and possesses technical value in realizing increased productivity and quality stabilization across the entire paper industry. Brief explanation of the drawing

[0047] FIG. 1 is an exemplary diagram of a papermaking apparatus configured according to a preferred embodiment of the present invention. FIG. 2 is a detailed view of the single dryer unit and touch roller proposed by the present invention. FIG. 3 is an exemplary diagram schematically showing a papermaking device and the arrangement of paper or paper being processed by the papermaking device. FIG. 4 is a usage state diagram showing the rotational form of the touch roller proposed by the present invention. FIG. 5 is an exemplary diagram schematically illustrating the form in which the rotation and angle of a touch roller are controlled based on AI proposed by the present invention. Specific details for implementing the invention

[0048] Hereinafter, the structure of the present invention and the resulting operation and effects will be described collectively with reference to the attached drawings.

[0050] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Furthermore, throughout the entire specification, the same reference numerals refer to the same components.

[0052] The present invention relates to a papermaking apparatus comprising a single dryer unit, a Yankee dryer unit, and a double dryer for drying paper sheets that have undergone natural dehydration and pressurized dehydration.

[0054] Above all, the present invention relates to a papermaking apparatus having a touch roller pressure structure for improving paper quality, wherein convenience of use or efficiency is maximized due to ease of handling, use, maintenance, and repair resulting from a structure differentiated from the existing one, such as by placing a touch roller on the side of the drum of the single dryer section to apply pressure to the paper in a lateral direction, unlike conventional drying methods in which pressure is applied only from the upper or lower direction of the drum as the paper passes through the single dryer section, thereby promoting the discharge of moisture remaining inside the paper and improving the efficiency of the drying process.

[0056] FIG. 1 is an exemplary diagram of a papermaking device configured according to a preferred embodiment of the present invention, FIG. 2 is a detailed diagram of a single dryer unit and a touch roller proposed by the present invention, FIG. 3 is an exemplary diagram schematically showing the arrangement of a paper sheet or paper being processed by the papermaking device, FIG. 4 is a usage state diagram showing the rotational form of a touch roller proposed by the present invention, and FIG. 5 is an exemplary diagram schematically showing the form in which the rotational status and angle of the touch roller are controlled based on AI proposed by the present invention.

[0058] The present invention is based on a paper manufacturing device comprising: a single dryer unit (100) that receives a paper sheet, which has undergone natural dehydration and pressurized dehydration along a set transport distance, and evaporates and discharges moisture contained in the paper sheet through a cylinder capable of heating or suction; a Yankee dryer unit (200) that provides a transport path for the paper sheet transported from the single dryer unit, pressurizes and fixes the paper sheet, and evaporates moisture contained in the paper sheet through thermal energy and hot air emitted from the outer surface; and a double dryer (300) that transports and dries the paper sheet by rotation by ensuring that both sides of the paper sheet transported from the Yankee dryer unit come into contact with a heated cylinder.

[0059] In particular, the present invention is characterized by comprising a touch roller (400) positioned on the side of the single dryer unit (100) and selectively contacting one side of the drum of the single dryer unit to pressurize the paper and improve dewatering efficiency and drying efficiency.

[0061] In other words, the papermaking device according to the present invention is composed of a single dryer unit that suppresses shrinkage of the paper sheet and strengthens bonding between fibers in the front end of the drying process, a Yankee dryer unit that removes residual moisture through long-term drying in the middle and rear ends, and a double dryer unit. By applying a touch roller pressure structure to the single dryer unit, the structural limitations of conventional drying equipment are overcome.

[0063] As shown in FIG. 1 or FIG. 3, the papermaking device according to the present invention comprises a single dryer unit (100), a Yankee dryer unit (200), a double dryer (300), and a touch roller (400).

[0064] The single dryer unit (100) described above is configured to receive paper sheets that have undergone natural dehydration and pressurized dehydration along a set transport distance and perform drying, and includes a hollow cylinder drum (110) inside, wherein the drum is configured to allow heating or intake to evaporate or discharge moisture contained in the paper sheets to the outside. As the paper sheets are transported along the outer surface of the drum, drying proceeds under the influence of heat and pressure.

[0065] The above Yankee dryer unit (200) provides a transport path for the paper sheet being transported from the single dryer unit (100), secures the paper sheet in close contact with the outer surface of the drum, and performs the function of evaporating the moisture remaining on the paper sheet through thermal energy and hot air emitted from the outer surface. In this process, the paper sheet undergoes additional drying under a relatively large contact area and stable transport conditions.

[0066] The above double dryer (300) is configured so that both sides of the paper sheet transferred from the Yankee dryer unit (200) come into contact with a heated cylinder, and drying is performed on both sides as the paper sheet is transferred by the rotation of the cylinder. Through this, final moisture removal is achieved, along with surface smoothness and dimensional stability.

[0068] The core technical feature of the present invention is the pressure structure of the touch roller (400) which is positioned on the side of the single dryer section (100) and applies local high pressure to the paper, thereby dramatically improving dewatering efficiency and initial drying efficiency.

[0069] The touch roller (400) is positioned to selectively contact one side of the drum constituting the single dryer unit (100), more specifically, a lateral area of ​​the outer surface of the drum formed along the direction of transfer of the paper. Due to this arrangement structure, the paper is pressed and forms a local nip between the drum (110) of the single dryer unit (100) and the touch roller (400).

[0070] The nip formed at this time has a significantly reduced contact width compared to the conventional large-diameter dryer cylinder-only contact method, so even if the same line load is applied, the surface pressure per unit area increases significantly. As a result, the movement of free water and bound water within the paper is promoted, increasing the mechanical dewatering effect, and at the same time, the degree of contact with the high-temperature drum is improved, thereby increasing the heat transfer efficiency.

[0072] The touch roller (400) is installed together with the single dryer unit (100) and the Yankee dryer unit (200) on the common frame (10), and is structurally configured to include a main frame (410), a housing (420), and a pressure drum (430).

[0073] The main frame (410) is a structural member that is fixedly or rotatably installed on the frame (10) to support the entire touch roller (400), and performs the role of stably maintaining the pressure position and pressure direction of the touch roller. A housing (420) is coupled to the front end of the main frame (410), and the housing may include a bearing structure that accommodates and simultaneously rotatably supports a pressure drum (430).

[0074] The pressure drum (430), rotatably coupled to the housing (420), is formed in a cylindrical shape and is positioned to make direct contact with the outer surface of the drum of the single dryer unit (100). The pressure drum (430) has a free-rotating structure to minimize frictional resistance during relative movement with the paper and rotates synchronously with the direction of transport of the paper, thereby not impairing the driving stability of the paper.

[0075] Additionally, the pressure drum (430) may be formed of a metal material or a surface-hardened material so as to minimize deformation even in a high-pressure environment, and if necessary, a fine texture or coating layer may be formed on the surface to prevent slipping of the paper and ensure uniform pressure.

[0076] Due to the pressure structure of the touch roller (400) as described above, the paper sheet is subjected to short-term pressure dehydration under high pressure and high temperature conditions during the initial drying stage in the single dryer section (100). This effectively suppresses shrinkage of the paper sheet and increases the bonding strength between fibers, thereby contributing to improving the strength, density, and surface quality of the final paper sheet.

[0077] In addition, since the touch roller (400) is configured to selectively contact the side of the single dryer unit (100), the pressure application and pressure conditions can be flexibly set according to the type, thickness, or initial moisture content of the paper, and the effect of greatly improving the freedom of equipment operation and process responsiveness is provided.

[0079] The touch roller (400) according to the present invention has a structure that is rotatably installed with respect to the frame (10) so as to flexibly control the contact state and pressure conditions with respect to the drum of the single dryer unit (100) according to the operating conditions of the paper.

[0080] To this end, the lower part of the main frame (410) supporting the touch roller (400) is hinge-connected to the frame (10), and the hinge connection is configured around a rotation axis so that the main frame can perform rotational movement within a certain angle range. Due to this hinge structure, the touch roller (400) can rotate in the forward and backward directions relative to the frame (10).

[0081] The upper part of the main frame (410) is connected to the rod of a driving cylinder (S) fixedly installed on the frame (10). The cylinder (S) may be composed of either a hydraulic cylinder or a pneumatic cylinder, and may be selectively applied according to the equipment's required specifications, pressure range, and response characteristics.

[0082] The rod of the cylinder (S) performs an extraction or extraction operation, and in conjunction with this operation, the main frame (410) rotates around the hinge joint. Accordingly, the positions of the housing (420) and the pressure drum (430) supported by the main frame (410) are displaced together, and as a result, the contact status, contact position, and contact angle of the pressure drum with respect to the drum (110) of the single dryer unit (100) are adjusted stepwise or continuously.

[0083] Specifically, when the rod of the cylinder (S) is withdrawn, the pressure drum (430) approaches the outer surface of the drum of the single dryer unit (100) to apply pressure to the paper, and when the rod is retracted, the pressure drum is separated from the drum and the pressure on the paper is released. In addition, by precisely controlling the amount of movement of the rod, the depth to which the pressure drum (430) contacts the outer surface of the drum, that is, the nip pressure and the contact width, can be finely adjusted.

[0084] With such a rotation and pressure control structure, the present invention can actively respond to changes in the thickness, basis weight, initial moisture content, or transfer speed of the paper. For example, in the case of a paper with a high moisture content, the dewatering efficiency can be increased by applying a high pressure by pressing the pressure drum (430) more closely against the drum, and in the case of a paper that is relatively thin or has undergone drying, the pressure can be reduced to prevent damage to the paper.

[0085] In addition, the touch roller (400) according to the present invention can change the pressurization conditions in real time by driving the cylinder (S) even during the drying process, so it can immediately respond to changes in process conditions during operation. This provides the effect of preventing problems such as breakage, wrinkling, or excessive density increase of the paper, while simultaneously continuously maintaining stable drying quality.

[0086] In addition, since it is possible to completely separate the touch roller (400) from the drum, work convenience and equipment safety can be simultaneously ensured during equipment maintenance, paper replacement, or switching to a non-pressurized operation mode.

[0088] The present invention may include an AI-based control structure that intelligently controls the pressure operation of a touch roller (400) in order to stably secure drying efficiency and product quality by actively responding to changes in the physical properties and process conditions of the paper. To this end, the present invention comprises a sensing unit (1), an AI analysis unit (2), and a control unit (3).

[0089] The above-described sensing unit (1) is configured to detect the condition of the paper flowing into the single dryer unit (100) in real time and measures at least one parameter among the type of paper, basis weight or thickness, and initial moisture content. The above-described sensing unit (1) may include at least one non-contact sensor capable of measurement without direct contact with the paper, such as an infrared (IR) moisture sensor, a laser displacement sensor, an optical thickness sensor, or an ultrasonic sensor, and may be configured to collect multivariate data simultaneously by combining a plurality of sensors as needed.

[0090] In this way, the paper condition information obtained through the sensing unit (1) is transmitted to the AI ​​analysis unit (2). The AI ​​analysis unit (2) uses the collected real-time sensing data as input values ​​and analyzes the drying characteristics of the paper based on a pre-established learning model or analysis algorithm. At this time, the AI ​​analysis unit (2) may utilize at least one of the quality indicators, such as the moisture content of the paper, the transfer speed, the drying history in the previous process, the quality deviation according to operating conditions, or the strength, density, and surface smoothness of the paper set as a target, as learning data or analysis criteria.

[0091] The AI ​​analysis unit (2) comprehensively analyzes this data to calculate the optimal pressure conditions for the current paper. Here, the optimal pressure conditions can be defined as a concept including at least one of the rotation angle at which the pressure drum (430) of the touch roller (400) contacts the drum of the single dryer unit (100), the pressure position, the linear pressure, or the pressure duration.

[0092] The above control unit (3) controls the driving cylinder (S) according to the pressurization conditions output from the AI ​​analysis unit (2). Specifically, the control unit (3) controls the rotation angle of the main frame (410) by controlling the load withdrawal or insertion amount of the cylinder (S), and accordingly, precisely controls the contact status, contact depth, and pressurization force of the pressurization drum (430). This control can be performed in a continuous control or stepwise control manner, and can be implemented as a closed-loop control structure as needed.

[0093] In particular, the control unit (3) of the present invention may be configured to continuously receive paper state information updated through the detection unit (1) even while the touch roller (400) is pressing the paper, and to re-input this information into the AI ​​analysis unit (2) to recalculate the pressing conditions in real time. Accordingly, even if changes in the moisture content of the paper, fluctuations in the transfer speed, or process disturbances occur, the pressing conditions are dynamically corrected and applied.

[0094] Through such real-time correction functions, the present invention can effectively prevent problems such as fiber destruction, wrinkling, or breakage of the paper sheet caused by excessive pressure, while simultaneously maximizing dewatering and drying efficiency. Furthermore, by automatically optimizing pressure conditions according to the paper sheet condition, it minimizes manual intervention by the operator and provides the effect of improving the repeatability of process conditions.

[0095] Furthermore, the AI-based touch roller control structure according to the present invention can continuously improve the correlation between process conditions and product quality by accumulating and learning long-term operation data, and thereby can be extended and applied to advanced intelligent drying equipment capable of responding to the production of various types of paper.

[0097] The AI-based touch roller control structure according to the present invention is configured to operate based on the point in time when the paper enters the single dryer section (100) in order to maximize the efficiency of forming physical properties and removing moisture, particularly during the initial drying stage of the paper manufacturing process.

[0098] Below, the timing of the touch roller (400) acting and the control flow in the entire drying process along the paper transfer path are explained step by step.

[0099] First, after undergoing molding and pressing processes, the paper is supplied to the front of the single dryer section (100) along a set transfer path. At this point, the paper still has a high moisture content, and the final paper quality is largely determined by subsequent drying conditions.

[0100] Just before or simultaneously with the entry of the paper into the single dryer unit (100), the detection unit (1) detects status information such as the type, basis weight or thickness, and initial moisture content of the paper in real time. The detected information is transmitted to the AI ​​analysis unit (2) before the paper comes into contact with the drum of the single dryer unit (100) and is analyzed preemptively.

[0101] The AI ​​analysis unit (2) comprehensively analyzes the real-time data input from the detection unit (1), the previously accumulated drying history data, the target quality conditions for each paper, and the current process operation conditions. Through this, it calculates the optimal pressure conditions required while the paper passes through the single dryer unit (100), namely whether the touch roller (400) rotates, the rotation angle, and the pressure level.

[0102] The calculated pressure conditions are transmitted to the control unit (3), and the control unit (3) drives the cylinder (S) accordingly to control the rotation of the main frame (410). As a result, the pressure drum (430) selectively contacts the side area of ​​the outer surface of the drum of the single dryer unit (100) or presses the paper with a set pressure.

[0103] At this stage, the touch roller (400) forms a localized pressure area between the drum of the single dryer section (100) and the paper, thereby applying high pressure per unit area to the paper. As a result, free moisture remaining inside the paper is effectively discharged, fiber bonding is promoted, and the initial shrinkage of the paper is suppressed. This process serves as a key step in determining the strength, density, and dimensional stability of the paper.

[0104] Even while the paper passes through the single dryer unit (100), the detection unit (1) continuously monitors changes in the state of the paper, and if a change in moisture content or transport conditions is detected, the information is provided in real time to the AI ​​analysis unit (2). The AI ​​analysis unit (2) recalculates the pressurization conditions based on this, and the control unit (3) finely adjusts the rotation angle or pressurization force of the touch roller (400) even during pressurization.

[0105] Through such real-time feedback control, the touch roller (400) maintains a state where the dewatering efficiency is optimized while preventing paper damage caused by excessive pressure.

[0106] The paper sheet that has passed through the single dryer unit (100) is then transferred to the Yankee dryer unit (200), where additional drying is performed by thermal energy and hot air while the paper sheet is fixed under pressure. At this stage, since sufficient pre-pressurized dehydration has already been performed in the single dryer unit (100), the heat transfer efficiency of the Yankee dryer unit (200) is improved, and the drying variation is reduced.

[0107] Afterwards, the paper is transferred to a double dryer (300) and contacts a cylinder heated on both sides for a long time to remove final moisture, and the target surface smoothness and uniform quality of the paper are achieved.

[0108] As a result, the AI-based touch roller control structure according to the present invention plays a role in improving the energy efficiency of the entire drying process and significantly improving the stability and reproducibility of paper quality by preemptively and actively controlling the pressure conditions from the initial drying stage of the paper.

[0110] The present invention, configured as described above, selectively applies high pressure to the paper sheet through a rotatable touch roller positioned on the side of the drum of the single dryer unit during the initial drying stage of the paper manufacturing process, thereby maximizing the pressure per unit area to enhance the dehydration and shrinkage inhibition effects, increase fiber bonding strength and paper strength, and flexibly respond to various process conditions, while comprehensively improving drying efficiency, energy efficiency, and product quality without structural changes to existing equipment.

[0112] The present invention described above has been explained with reference to an exemplary embodiment illustrated in the drawings, but this is merely illustrative, and it should be made clear to those skilled in the art that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be interpreted by the appended claims, and all technical ideas within an equivalent scope should be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0114] 1. Detection Unit 2. AI Analysis Unit 3. Control unit 10. Frame 100. Single dryer unit 200. Yankee dryer unit 300. Double Dryer 400. Touch Roller 410. Mainframe 420. Housing 430. Pressurized drum S. Cylinder

Claims

Claim 1 A single dryer unit (100) that receives a paper sheet that has undergone natural dehydration and pressurized dehydration along a set transport distance and evaporates and discharges moisture contained in the paper sheet through a cylinder capable of heating or suction; a Yankee dryer unit (200) that provides a transport path for the paper sheet transported from the single dryer unit, pressurizes and fixes the paper sheet, and evaporates moisture contained in the paper sheet through thermal energy and hot air emitted from the outer surface; and a double dryer (300) that transports and dries the paper sheet by rotation by ensuring that both sides of the paper sheet transported from the Yankee dryer unit come into contact with a heated cylinder. A papermaking device comprising: a touch roller (400) positioned on the side of a single dryer unit and selectively contacting one side of the drum of the single dryer unit to pressurize the paper and improve dewatering efficiency and drying efficiency, wherein the touch roller (400) comprises: a main frame (410) fixedly installed on a frame (10) on which a single dryer unit and a Yankee dryer unit are installed; and a housing (420) coupled to the front end of the main frame. It is formed by a pressure drum (430) that is rotatably coupled to a housing and pressurizes the paper while contacting the outer surface of the drum of the single dryer unit; wherein the pressure force is finely adjusted according to the condition of the paper by selectively adjusting whether there is contact with the drum of the single dryer unit (100) or the degree of pressure applied based on the frame, and the main frame (410) has its lower end hinged to the frame, and its upper end is coupled to the rod of a driving cylinder (S) coupled to the frame, and the rotation angle and pressure position are controlled by the rotation of the main frame according to the withdrawal and retraction operation of the cylinder rod; and the touch roller (400) is installed on the frame (10) and includes a detection unit (1) that detects at least one of the type, thickness, or moisture content of the paper supplied to the single dryer unit (100); an AI analysis unit (2) that analyzes the paper information obtained through the detection unit; and a control of whether the touch roller rotates or the rotation angle according to the analysis result of the AI ​​analysis unit. Control unit (3);A papermaking device having a touch roller pressurizing structure for improving paper quality, characterized by being based on closed-loop control that maintains dewatering efficiency without fiber breakage by learning and correcting in real-time the correlation between changes in initial drying moisture content, paper type, basis weight, feed speed, nip pressure, contact depth, and rotation angle. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete

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