Automatic production device for layered paper

Abstract

An automatic production device for layered paper, sequentially comprising, in a layered paper making process, a paper pulp tank (1), two paper making mechanisms, a glue applying roller (3), a composite pressing roller (4), a hot drying box (5), a traction mechanism and a winding roller (7), wherein the two paper making mechanisms are each provided with a paper pulp groove (21), a high-frequency vibration mechanism (22), a wire mesh (23), a pre-drying box (24) and a scraper (25); paper pulp flowing out of the paper pulp tank (1) is separately conveyed into the two paper pulp grooves (21), the high-frequency vibration mechanisms (22) drive the paper pulp in the paper pulp grooves (21) to generate high-frequency vibration, and part of the paper pulp that has vibrated through the paper pulp grooves (21) is attached to the surfaces of the wire meshes (23); the paper pulp on the wire meshes (23) is preliminarily dried to form paper pulp layers, and the paper pulp layers are conveyed to the scrapers (25) by means of guide rollers for separation; a paper pulp layer coated with an adhesive and an uncoated paper pulp layer are rolled into the composite pressing roller (4) to be compounded and fed into the hot drying box (5) for drying, and dried layered paper is fed into the winding roller (7) by means of the traction mechanism; and the vibration frequencies of the two high-frequency vibration mechanisms (22) are different. The production process parameters of the device can be intelligently controlled, so as to ensure that the product quality is stable and uniform.

Description

Automated layered paper production device Technical Field

[0001] The invention belongs to the technical field of layered paper production, and in particular relates to an automatic layered paper production device. Background Art

[0002] The current production process for stratified paper consists of pulping, papermaking, calendering, and rewinding. This traditional, multi-step process involves a high proportion of manual labor and requires increased automation. A truly automated, integrated production line from pulp to finished stratified paper is lacking. This presents challenges for mass production of stratified paper. While the workload is high, production efficiency remains low. A lack of quality inspection and control measures between processes leads to inconsistent final product quality and frequent product returns. Pulp and semi-finished products require repeated loading, unloading, and transportation between processes, increasing production costs. Expanding production capacity solely by increasing the number of equipment is not ideal. To achieve integrated, continuous, and automated production from pulp to finished product, the development and design of an advanced automated production line is urgently needed. This would significantly improve the yield and quality of stratified paper and enable intelligent, energy-efficient, and emission-reducing production. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of this application is to provide an automated layered paper production device to solve the existing problems of repeated loading and unloading, transportation and production costs.

[0004] To achieve the above-mentioned purpose or other related purposes, the present application discloses an automated layered paper production device, which includes a pulp tank, two papermaking mechanisms, a glue roller, a composite pressure roller, a hot drying box, a traction mechanism and a winding roller in sequence along the layered paper production process; the two papermaking mechanisms are respectively equipped with a pulp tank, a high-frequency vibration mechanism, a wire mesh, a pre-drying box and a scraper; the pulp flowing out of the pulp tank is respectively fed into two pulp tanks, the pulp tanks are arranged on the high-frequency vibration mechanism, and the high-frequency vibration mechanism drives the pulp in the pulp tank to vibrate at a high frequency, and part of the paper vibrated by the pulp tank is The pulp adheres to the surface of the wire mesh; the pulp on the wire mesh is initially dried in the pre-drying box to form a pulp layer and is sent to a scraper through a guide roller. The scraper is used to separate the pulp layer from the wire mesh; one of the separated pulp layers is sent to a glue roller to be coated with an adhesive, and the adhesive-coated pulp layer and the uncoated pulp layer are rolled together into the composite pressing roller for composite, and after being composited into layered paper, they are sent to a hot drying box for drying, and the dried layered paper is sent to the winding roller through a traction mechanism; wherein the vibration frequencies of the two high-frequency vibration mechanisms are different.

[0005] In certain embodiments provided in the present application, the high-frequency vibration mechanism includes an ultrasonic transducer and a power supply assembly, the ultrasonic transducer is connected to the bottom of the pulp tank, and the power supply assembly is electrically connected to the ultrasonic transducer; the high-frequency vibration mechanism is used to generate high-frequency vibrations of 20kHz-40kHz and transmit them to the pulp tank.

[0006] In certain embodiments provided herein, the papermaking mechanism further comprises a guide roller set, and the wire web is dipped obliquely into the pulp tank via the guide roller mechanism.

[0007] In certain embodiments provided in the present application, the guide roller group includes a first guide roller, a second guide roller, a third guide roller and a fourth guide roller, the first guide roller is immersed in the pulp of the pulp trough, the second guide roller and the third guide roller are respectively arranged at both ends of the pre-drying box, the second guide roller is located obliquely above the first guide roller, the scraper is provided at the third guide roller, and the fourth guide roller is arranged between the first guide roller and the third guide roller.

[0008] In certain embodiments provided herein, the scraper is arranged parallel to the third guide roller.

[0009] In certain embodiments provided herein, a pre-pressing roller is further provided above the second guide roller, and the pre-pressing roller and the second guide roller are pressed together to control the thickness and moisture content of the pulp on the wire mesh.

[0010] In certain embodiments provided in the present application, the traction mechanism includes: the traction mechanism includes a first guide roller, a second guide roller, a third guide roller and a tension roller, the hot drying box is arranged between the first guide roller and the second guide roller, the tension roller is arranged between the second guide roller and the third guide roller, and the third guide roller feeds the layered paper into the winding roller.

[0011] Beneficial effects of the present invention:

[0012] This application achieves automated, integrated production from pulp to finished product, eliminating the need for repetitive manual loading, unloading, and transportation, thus reducing production costs. This application utilizes a modular design, facilitating equipment commissioning and capacity expansion, and enabling flexible production of different types of layered paper. The application's production process parameters can be intelligently controlled to ensure stable and uniform product quality. Continuous, closed-loop production significantly improves production efficiency, reduces labor intensity, and achieves intelligent, energy-saving, and environmentally friendly production. This application facilitates expanded production capacity and improves the output and quality of layered paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] FIG1 is a schematic diagram of an automated layered paper production apparatus according to the present invention.

[0015] Description of Figure Numbers:

[0016] 1- pulp tank, 21- pulp tank, 22- high-frequency vibration mechanism, 23- wire mesh, 24- pre-drying box, 25- scraper, 26- first guide roller, 27- second guide roller, 28- third guide roller, 29- fourth guide roller, 3- glue roller, 4- composite pressure roller, 5- hot drying box, 61- first guide roller, 62- second guide roller, 63- tension roller, 64- third guide roller, 7- winding roller. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "installed," "connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0020] Exemplary embodiments

[0021] To achieve the above-mentioned purpose or other related purposes, the present application discloses an automated layered paper production device, which includes a pulp tank 1, two papermaking mechanisms, a glue roller 3, a composite pressing roller 4, a hot drying box 524, a traction mechanism and a winding roller 7 along the layered paper production process; the two papermaking mechanisms respectively have a pulp tank 21, a high-frequency vibration mechanism 22, a wire mesh 23, a pre-drying box and a scraper 25; the pulp flowing out of the pulp tank 1 is respectively fed into two pulp tanks 21, and the pulp tanks 21 are arranged on the high-frequency vibration mechanism 22. The high-frequency vibration mechanism 22 drives the pulp in the pulp tank 21 to vibrate at a high frequency, and the pulp is vibrated by the pulp tank 21. The moving part of the pulp adheres to the surface of the wire mesh 23; the pulp on the wire mesh 23 is initially dried in the pre-drying box to form a pulp layer and is sent to the scraper 25 through the guide roller. The scraper 25 is used to separate the pulp layer from the wire mesh 23; one of the separated pulp layers is sent to the glue roller 3 to be coated with an adhesive, and the pulp layer coated with the adhesive and the uncoated pulp layer are rolled into the composite pressing roller 4 for composite, and after being composited into layered paper, they are sent to the hot drying box 524 for drying. The dried layered paper is sent to the winding roller 7 through the traction mechanism; the vibration frequencies of the two high-frequency vibration mechanisms 22 are different.

[0022] In any of the embodiments provided herein, pulp tank 1 serves as the source of pulp for the entire production line, storing pulp of varying types and concentrations. The tank is constructed of stainless steel with a polished surface for easy cleaning. An internal stirring device homogenizes the pulp. A discharge port and transfer pump are located at the bottom, precisely supplying pulp to subsequent processes at a set flow rate.

[0023] In any embodiment provided in this application, the two papermaking mechanisms are the core papermaking system of the device, which is used to produce wet pulp layers of different thicknesses. Each pulp tank 21 can be filled with a certain volume of pulp, and the tank body is made of engineering plastic with good corrosion resistance.

[0024] In any embodiment provided in the present application, the high-frequency vibration mechanism 22 includes an ultrasonic transducer and a power supply assembly, the ultrasonic transducer is connected to the bottom of the pulp tank 21, and the power supply assembly is electrically connected to the ultrasonic transducer; the high-frequency vibration mechanism 22 is used to generate high-frequency vibrations of 20kHz-40kHz and transmit them to the pulp tank 21. The high-frequency vibration mechanism 22 includes a vibration transducer and a power supply device, which can generate high-frequency mechanical vibrations of 20-40KHz, thereby causing the pulp to vibrate continuously and regularly at high frequencies. The wire mesh 23 is arranged obliquely in the pulp tank 21. Under the action of vibration, the fibers in the pulp are broken and corrugated, and gradually adhere to the wire mesh 23 to form a wet pulp layer. The two sets of papermaking mechanisms have different vibration frequencies, and wet pulp layers with different microscopic fiber structures can be prepared.

[0025] In any embodiment provided herein, the papermaking mechanism further includes a guide roller group, through which the wire web 23 is obliquely immersed in the pulp tank 21. In certain embodiments provided herein, the guide roller group includes a first guide roller 26, a second guide roller 27, a third guide roller 28, and a fourth guide roller 29. The first guide roller 26 is immersed in the pulp in the pulp tank 21. The second guide roller 27 and the third guide roller 28 are respectively provided at both ends of the pre-drying box. The second guide roller 27 is located obliquely above the first guide roller 26. The third guide roller 28 is provided with the scraper 25. The fourth guide roller 29 is provided between the first guide roller 26 and the third guide roller 28.

[0026] In any of the embodiments provided herein, the wet pulp layer passes through a pre-drying oven along with the wire mesh 23 for preliminary drying to enhance formability and mechanical strength. The drying oven utilizes a hot air circulation design, which rapidly increases the drying rate of the pulp layer and reduces its moisture content. The dried wet pulp layer is then separated from the wire mesh 23 by a scraper 25 and proceeds to subsequent processes.

[0027] In any embodiment provided in this application, the scraper 25 is arranged parallel to the third guide roller 28. The scraper 25 is made of a precision-ground high-hardness alloy material, which can effectively control the scraping force and ensure the surface quality of the wet pulp layer.

[0028] In any embodiment provided herein, the glue roller 3 applies glue to one wet pulp layer to bond it to another wet pulp layer. The roller surface is precisely double-sided ground to ensure the thickness and uniformity of the glue coating.

[0029] In any of the embodiments provided herein, a pre-pressing roller is further positioned above the second guide roller 27. This pre-pressing roller and the second guide roller 27 are pressed together to control the thickness and moisture content of the pulp on the wire mesh 23. The composite press roller 4 presses the two wet pulp layers into a layer, forming wet-laminated paper. A hot drying oven 524 dries the wet-laminated paper. The oven is divided into multiple zones, allowing precise control of hot air parameters to uniformly reduce the moisture content of each layer of the laminated paper, meeting the standard for delivery.

[0030] In any embodiment provided herein, the traction mechanism includes a first guide roller 61, a second guide roller 62, a third guide roller 64, and a tension roller 63. The heat drying box 524 is disposed between the first guide roller 61 and the second guide roller 62. The tension roller 63 is disposed between the second guide roller 62 and the third guide roller 64. The third guide roller 64 feeds the layered paper into the winding roller 7. The traction mechanism drives the layered paper forward stably, ensuring the straightness of the paper during transportation. The winding roller 7 achieves precise rewinding at a fixed diameter to ensure the quality of the finished packaging.

[0031] Specific embodiment 1

[0032] Before the production process begins, the entire automated layered paper production line must be thoroughly inspected to ensure that every component and module is in proper working order. Operators must clean the pulp tank 1 and pulp trough 21 to ensure there are no residues inside. The transmission system connections of the high-frequency vibration mechanism 22, the glue roller 3, and the composite pressure roller 4 must be checked for proper operation. The hot air system piping must be unobstructed. The traction mechanism and winder roller 7 must be inspected for any equipment issues. Once any equipment problems have been resolved, the production preparation phase begins. Equipment inspection is crucial to ensuring normal production. Any component failure could lead to product quality issues or accidents. Operators are responsible for thoroughly flushing the equipment with clean water to remove production residues and prevent contamination. The couplings, bearings, and other components of the mechanical transmission system must also be checked for proper operation to prevent malfunctions. The hot air system is directly related to the drying quality of the paper, and the piping must be free of dust and blockage. The completion of the equipment inspection signifies that all production preparations are complete.

[0033] According to the production plan, the first step is to prepare the various required paper pulp slurries. Operators calculate and prepare the corresponding natural fiber slurries such as wood pulp and bamboo pulp, as well as fillers and functional chemical additives based on the variety and specifications of the layered paper. Slurries of different formulations need to be mixed and stirred in advance in the reserve mixing system to prepare a composite slurry with uniform concentration and composition that meets the requirements. The mixing process is controlled at low shear to ensure the integrity of the long fibers. The preparation of the slurry is directly related to the quality of the finished product and must be operated according to standard procedures. The raw material ratio must be accurately calculated, the addition order must be correct, the mixing time and speed must be appropriate, and no quality risks must be left. The optimized slurry formula obtained after repeated testing and verification can be put into mass production.

[0034] The evenly stirred composite slurry is quantitatively pumped into the two pulp tanks 21, and the slurry volume is strictly controlled to ensure that the difference in the gram weight of the two layers of wet pulp is controlled within the specified range. The slurry needs to be mixed again in the tank to ensure that the concentration of each part of the slurry is consistent. The slurry concentration in the two pulp tanks 21 can be slightly different according to product requirements. The configuration of the slurry directly affects the difference in the floor volume of the two layers of wet pulp, which is related to the stratification effect. Therefore, the quantitative supply of the slurry must be accurate and stable, and real-time monitoring must be performed during operation to ensure that the slurry configuration is compliant. The slurry mixing must not produce local concentration differences and must be fully uniform.

[0035] After the slurry is ready, the vibration mechanism is started to ultrasonically vibrate the slurry in the two pulp tanks 21. Under the action of high-frequency vibration of 20-40 kHz, the fibers in the slurry gradually disperse and settle and adhere to the two papermaking wires 23. At the same time, the vibration also accelerates the shedding of moisture. The two wires 23 form two layers of wet pulp with different thicknesses. The wires 23 need to maintain a certain inclination angle to allow the slurry to flow from top to bottom to ensure that the thickness of the wet pulp layer is uniform. High-frequency vibration is a key process in papermaking. Through frequency control, a wet pulp layer of set specifications can be accurately obtained. Therefore, the stability of the vibration frequency must be monitored in real time. The inclination angle of the wire 23 will also affect the thickness distribution of the wet pulp layer and must be regularly tested and adjusted.

[0036] As the wire mesh 23 moves, the two layers of wet pulp enter their respective pre-drying boxes for preliminary drying. The hot air system blows in hot air at 120-150°C to quickly increase the dryness of the wet pulp layer and dehydrate it to the set range. A higher initial drying temperature is conducive to the bonding of long fibers, but over-drying will make the paper too hard, and it will appear jagged when it comes out of the pre-drying box. This is an unqualified product that must be removed. The wet pulp layer needs to be completely separated from the wire mesh 23 by a scraper 25 to enter the next process. The hot air temperature and residence time of the pre-drying process have a direct impact on the moisture content of the wet pulp layer. To control the optimal initial dryness of the paper, it is necessary to repeatedly test and establish data, and to monitor and adjust parameters in real time to prevent quality problems.

[0037] The thinner wet pulp layer after separation enters the glue roller 3, which applies the adhesive to one side of the layer at a precise speed. The amount of adhesive applied directly affects the bonding strength of the two layers of wet pulp. After the glue coating is evaporated and dehumidified by a small amount of hot air, it enters the pressing area together with another thicker wet pulp layer. The two wet pulp layers are tightly bonded together under the pressure of the composite pressing roller 4 and calendered, and a two-layer wet composite layered paper is formed. The amount of glue directly determines the bonding strength of the two layers of pulp and must be precisely controlled by adjusting the speed of the glue roller 3. After the roller is glued, it needs to be further air-dried to make the glue film semi-dry, which is very critical to enhancing the bonding between the layers.

[0038] Newly produced wet-laminated paper passes through guide rollers and enters the hot air drying system. As the paper slowly advances within the drying oven, it is subjected to hot air from multiple temperature zones. Moisture evaporates from the interior of the paper and further bonds the two pulp layers. A high-temperature-resistant wire mesh conveyor belt helps accelerate surface moisture evaporation. The moisture content of the finished laminated paper after exiting the oven can be controlled at around 8-10%. Hot air drying is a critical step in finalizing the finished paper's shape. Zoned temperature control ensures an optimal drying curve, preventing quality issues such as curling and wrinkling. Online moisture content monitoring enables closed-loop control of hot air parameters to ensure product quality.

[0039] The dried, finished layered paper is conveyed by a traction mechanism to wind-up roller 7. This system precisely rewinds the paper into a full roll according to the set diameter and automatically cuts it. The system's output can be adjusted by adjusting the line speed. The finished layered paper is then cut to length and flow-wrapped in the packaging system, becoming the final product. Accurate diameter control and smooth, neat trimming in the winding system are crucial for convenient downstream packaging and transportation. Parameters in the automated packaging system require adjustment to ensure high-quality packaging.

[0040] Specific embodiment 2

[0041] During the production preparation phase, the operator first conducts a comprehensive inspection of the equipment to ensure that all modules are functioning properly, especially the connection of the high-frequency vibration mechanism 22. The slurry is then prepared, using a ratio of 80% wood pulp to 20% bamboo pulp, based on the specifications for the layered paper being produced. After low-speed stirring, the slurry is pumped into two pulp tanks 21, with the weight difference between the two layers controlled to be 10 g / m². 2 .

[0042] In this embodiment, a high-frequency vibration frequency of 35 kHz is used to continuously and stably excite the slurry in the two pulp vats 21 with ultrasonic vibrations. This frequency facilitates the formation of a looser fiber structure. After the two wet pulp layers are formed on the papermaking wire 23, they enter a 120°C hot air pre-drying oven for dehydration. The moisture content of the two wet pulp layers is monitored and maintained within a set range. The layers are then separated from the wire using a precision scraper 25.

[0043] A thin layer of wet pulp passes through the gluing roller 3 for single-sided gluing. The glue application rate is controlled to achieve optimal bonding. The two layers of wet pulp are then laminated and formed on the pressing rollers, forming a two-layer wet-laminated paper. After drying in a multi-zone hot air oven, the moisture content can be controlled to around 8%.

[0044] The layered paper prepared in this example has a relatively similar visual appearance in the finished product due to the small difference in slurry weight between the two layers. However, the difference between the two layers is clearly noticeable through touch. The final product has a soft and smooth feel overall, with no noticeable hardness difference between the layers, enhancing the product's softness and foaming effect. This layered paper combines a light, thin, and soft feel with distinct layers, making the product more comfortable to use.

[0045] Specific embodiment 3

[0046] In this embodiment, a high-frequency vibration frequency of 32 kHz and an initial drying temperature of 130°C are used to control the weight difference of the two layers of wet pulp to be 15 g / m 2This frequency is conducive to forming a denser fiber structure, and the pre-drying temperature of 130°C gives the paper a certain degree of rigidity. The two layers of wet pulp have a gram weight of 15g / m 2 There is a clear contrast between soft and hard layers.

[0047] The resulting layered paper exhibits distinct hardness and soft / hard characteristics. Specifically, the hard layer feels smooth and delicate, while the soft layer is fluffy and smooth. The distinct transitions between layers create a rich, textured feel. This layered paper combines visual layering with a distinct tactile experience, resulting in a rich, textured feel.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, improvements, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automated layered paper production device, characterized in that: The production process of layered paper includes a pulp tank, two papermaking mechanisms, a glue roller, a composite pressing roller, a hot drying box, a traction mechanism and a winding roller; the two papermaking mechanisms respectively have a pulp tank, a high-frequency vibration mechanism, a wire net, a pre-drying box and a scraper; the pulp flowing out of the pulp tank is respectively sent to two pulp tanks, the pulp tanks are arranged on the high-frequency vibration mechanism, the high-frequency vibration mechanism drives the pulp in the pulp tank to vibrate at a high frequency, and part of the pulp vibrated by the pulp tank is attached to the surface of the wire net; the paper on the wire net After the pulp is preliminarily dried in the pre-drying box, a pulp layer is formed and sent to a scraper through a guide roller. The scraper is used to separate the pulp layer from the wire mesh. After separation, one of the pulp layers is sent to a glue roller to be coated with an adhesive. The pulp layer coated with the adhesive and the uncoated pulp layer are rolled into the composite pressing roller for composite. After composited into layered paper, they are sent to a hot drying box for drying. The dried layered paper is sent to the winding roller through a traction mechanism. The vibration frequencies of the two high-frequency vibration mechanisms are different.

2. The automated layered paper production device according to claim 1, characterized in that: The high-frequency vibration mechanism includes an ultrasonic transducer and a power supply assembly, the ultrasonic transducer is connected to the bottom of the pulp tank, and the power supply assembly is electrically connected to the ultrasonic transducer; the high-frequency vibration mechanism is used to generate high-frequency vibrations of 20kHz-40kHz and transmit them to the pulp tank.

3. The automated layered paper production device according to claim 1, characterized in that: The papermaking mechanism further comprises a guide roller group, and the wire web is obliquely immersed in the pulp tank via the guide roller group.

4. The automated layered paper production device according to claim 3, characterized in that: The guide roller group includes a first guide roller, a second guide roller, a third guide roller and a fourth guide roller, the first guide roller is immersed in the pulp of the pulp trough, the second guide roller and the third guide roller are respectively arranged at two ends of the pre-drying box, the second guide roller is located obliquely above the first guide roller, the scraper is provided at the third guide roller, and the fourth guide roller is arranged between the first guide roller and the third guide roller.

5. The automated layered paper production device according to claim 4, characterized in that: The scraper is arranged in parallel with the third guide roller.

6. The automated layered paper production device according to claim 4, characterized in that: A pre-pressing roller is further provided above the second guide roller, and the pre-pressing roller and the second guide roller are pressed together to control the thickness and moisture of the pulp on the wire mesh.

7. The automated layered paper production device according to claim 1, characterized in that: The traction mechanism includes: the traction mechanism includes a first guide roller, a second guide roller, a third guide roller and a tension roller, the heat drying box is arranged between the first guide roller and the second guide roller, the tension roller is arranged between the second guide roller and the third guide roller, and the third guide roller feeds the layered paper into the winding roller.

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