Method for improving flatness of sheepskin surface paper of paper tube

Abstract

The invention discloses a method for improving the flatness of sheepskin surface paper of a paper tube, which comprises an unwinding frame, a gluing device and a tensioning guide rod assembly arranged at the feeding end of the gluing device, an infiltration water tank is arranged between the unwinding frame and the tensioning guide rod assembly, and a leveling assembly is arranged between the tensioning guide rod assembly and a glue tank. A water control assembly is arranged at the discharging end of the infiltrating water tank, sheepskin surface paper on the unwinding frame is infiltrated through the infiltrating water tank, the humidity is controlled through the water control assembly, dust on the surface is scraped off, then the sheepskin surface paper is pulled to the tensioning guide rod assembly, and finally the sheepskin surface paper is flattened through the tension and flattening assembly and then enters the gluing roller to be subjected to single-face gluing. Compared with the prior art, the surface paper has the advantages that the tensile strength and the surface tidiness of the surface paper can be improved, the sheepskin surface paper dust is cleaned, meanwhile, the breakage condition is avoided, the surface smoothness of a formed paper tube is remarkably improved, and the surface paper plays a key role in high-speed winding forming and unwinding processing of superfine chemical fiber spinning cakes below 0.55 dtex.

Description

Technical Field

[0001] This invention relates to the technical field of paper tube manufacturing processes, specifically to a method for improving the flatness of the parchment paper facing of paper tubes. Background Technology

[0002] During the paper tube production process, a layer of colored parchment paper is often wound and adhered to the surface of the paper tube as a facing paper. The feeding system for the colored parchment paper is as follows: Figure 1 As shown, the assembly includes an unwinding frame 1, a tensioning guide rod assembly 3, a pressure block assembly 4, and a gluing device 6. A colored parchment roll 2 is placed on the unwinding frame 1. The colored parchment is first guided and tensioned by the tensioning guide rod assembly 3, then enters the feed end of the gluing device 6. The colored parchment is then flattened by an appropriate amount of pressure blocks 4, and then glued by the gluing roller 62. Finally, it is wound onto the surface of the paper tube 7. During the gluing process, because there is a distance between the unwinding frame 1 and the tensioning guide rod assembly 3, the flatness of the parchment is insufficient during gluing. Furthermore, the surface of the colored parchment itself contains some dust, resulting in the paper tube's surface not achieving optimal smoothness and flatness. To address the issue of flatness, one or more sheet-like metal blocks 4 are typically placed on the surface of the paper at the feed end of the gluing device 6 for flattening. However, this poses a safety hazard when operators handle the blocks. To prevent the metal blocks 4 from breaking easily after direct contact with the paper, a flexible material with a certain degree of flatness, such as a sponge pad 5, is usually added between them for cushioning.

[0003] This results in the surface flatness of the paper tubes produced by the current paper feeding mechanism mainly depending on the weight of the pressure block 4 and the flatness of the pressing surface. While the presence of the pressure block 4 can ensure better flatness, the colored parchment paper itself has relatively low tensile strength, and the stress point is in the glue roller 62 area of ​​the gluing device 6, making it more prone to breakage during transportation. Furthermore, the surface flatness and smoothness of the formed paper tube 7 cannot effectively meet the application requirements of ultra-fine chemical fiber filaments below 0.55 dtex in high-speed winding and spinning equipment. The short paper tubes after slitting not only have a high defect rate, but also tend to increase filament breakage during winding due to surface smoothness and flatness issues. Therefore, the feeding process of colored parchment paper needs to be improved. Summary of the Invention

[0004] To address certain technical problems existing in the prior art, the purpose of this application is to provide a method for improving the flatness of parchment paper on paper tubes. This method can improve the tensile strength and surface cleanliness of the paper itself, remove parchment paper dust while preventing breakage, and significantly improve the surface smoothness of the formed paper tube. It can be effectively applied to the high-speed winding and spinning of ultrafine chemical fiber filaments below 0.55 dtex, playing a key role in the high-speed winding and unwinding of ultrafine chemical fiber filaments.

[0005] To solve the aforementioned technical problems, this application adopts the following technical solution: A method for improving the flatness of parchment paper on paper tubes includes an unwinding frame, a gluing device, and a tensioning guide rod assembly located at the feed end of the gluing device. The gluing device includes a frame, a glue tank on the frame, a gluing roller driven by a motor on the glue tank, a scraper roller on one side of the gluing roller, and a plurality of guide rods located at the discharge end of the frame. A wetting tank is provided between the unwinding frame and the tensioning guide rod assembly. A leveling component is provided between the tensioning guide rod assembly and the glue tank. A water control component is provided at the discharge end of the wetting tank. The parchment paper on the unwinding frame is wetted in the wetting tank, and the humidity is controlled by the water control component and surface dust is scraped off before being pulled to the tensioning guide rod assembly. Finally, the parchment paper is leveled by tension and the leveling component before entering the gluing roller for single-sided gluing.

[0006] Preferably, the water in the immersion tank is warm water, and the temperature of the warm water is 60~75℃.

[0007] Preferably, the leveling component includes 3 to 5 smooth and parallel stainless steel metal rods. The parchment paper between the tensioning guide rod assembly and the gluing roller is pulled in a V-shaped trajectory after being pressed downward by the leveling component.

[0008] Preferably, the leveling component further includes an adjusting bracket disposed on the frame, and the distance between the stainless steel metal rod and the upper surface of the frame can be adjusted by the adjusting bracket.

[0009] Preferably, the adjusting bracket includes L-shaped connecting seats at both ends of the stainless steel metal rod, a plurality of sliding grooves on the L-shaped connecting seats, a slider in the sliding grooves, and an adjusting rod on the L-shaped connecting seats for adjusting the slider up and down.

[0010] Preferably, a pressure sensor is provided between the adjusting rod and the slider, and pressure displays are provided on both sides of the frame to display the pressure values ​​of each pressure sensor on the current side; at least one of the stainless steel metal rods, after being adjusted by the adjusting rod, can form a clamping force with the upper end surface of the frame to clamp the parchment paper.

[0011] Preferably, the leveling component further includes an adjusting bracket disposed on the frame, and the distance between the stainless steel metal rod and the upper surface of the frame can be adjusted by the adjusting bracket.

[0012] Preferably, the adjusting bracket includes L-shaped connecting seats at both ends of the stainless steel metal rod, a plurality of sliding grooves on the L-shaped connecting seats, a slider in the sliding grooves, and an adjusting rod on the L-shaped connecting seats for adjusting the slider up and down.

[0013] Preferably, a pressure sensor is provided between the adjusting rod and the slider, and pressure displays are provided on both sides of the frame to display the pressure values ​​of each pressure sensor on the current side; at least one of the stainless steel metal rods, after being adjusted by the adjusting rod, can form a clamping force with the upper end surface of the frame to clamp the parchment paper.

[0014] Preferably, the water control assembly includes an adjustment frame on both sides of the discharge end of the immersion tank and two pressure rollers between the adjustment frames, so that the parchment paper discharged from the tank has excess water removed by the squeezing of the two pressure rollers.

[0015] Preferably, a sponge collar is fitted on the outer side of the pressure roller, and the two sides of the parchment paper are squeezed and drained by the sponge collar.

[0016] Preferably, the adjusting frame includes a support block with both ends fixed to the side of the immersion tank by bolts, an elongated mounting hole on the support block, and an actuator on the top of the support block. After the two ends of the pressure roller are inserted into the elongated mounting hole, the actuator presses the upper pressure roller downward to form a clamping and squeezing force.

[0017] Preferably, the actuator in the water control assembly is automatically adjusted by a pneumatic or electric actuator, and the discharge end of the immersion tank is also equipped with a humidity sensor to detect the humidity of the sheepskin fabric after water control. The humidity sensor is linked to the actuator for control.

[0018] Preferably, the immersion tank includes a water storage tank, a guide roller disposed at the feed end of the water storage tank, a heating component disposed in the water storage tank, and a temperature controller disposed on the outside of the water storage tank. The water storage tank is also provided with a temperature sensor, and the water temperature in the water tank is controlled by linkage between the temperature sensor and the temperature controller.

[0019] Preferably, a square guide block is provided on the outermost guide rod at the discharge end of the frame. The square guide block can be rotated and its angle adjusted by the guide rod. The parchment paper is guided by the corner of the square guide block and then pulled outward along the upper surface of the square guide block.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: An impregnation tank for wetting colored parchment paper was added between the existing unwinding frame and tension guide rod assembly. A water control component was also installed at the discharge end of the impregnation tank to control the humidity of the impregnated colored parchment paper. This improves the tensile strength of the parchment paper after impregnation, making it less prone to breakage under strong traction, and also removes dust adhering to the surface, ensuring a clean surface. This allows the paper to be smoothly drawn into the gluing roller for single-sided gluing after being leveled by the leveling component. The improved paper tube exhibits significantly enhanced surface smoothness, making it effective for high-speed winding and spinning of ultra-fine chemical fiber filaments below 0.55 dtex. This plays a crucial role in the high-speed winding and unwinding of ultra-fine chemical fiber filaments.

[0021] After moisture control treatment of the colored parchment paper, no problem of it breaking due to excessive tension has occurred during the production and processing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the existing technology, process, and equipment flow. Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the combined structure of the leveling component and the pressure sensor in this invention; Figure 4 This is a schematic diagram of the immersion tank structure with water control components and humidity sensor in this invention. Figure 5 The diagram below, marked A in this invention, shows a guide rod structure with a square guide block installed. Figure 6 This is a flowchart of the temperature and humidity control system in this invention; In the diagram: 1. Unwinding frame; 2. Colored parchment roll; 3. Immersion tank; 31. Heating assembly; 32. Water storage tank; 33. Guide roller; 4. Water control assembly; 41. Adjusting frame; 411. Actuator; 412. Support block; 413. Long strip mounting hole; 42. Sponge collar; 43. Pressure roller; 5. Humidity sensor; 6. Tensioning guide rod assembly; 7. Leveling assembly; 71. Stainless steel metal rod; 72. Adjusting bracket; 721. L-shaped connecting seat; 722. Adjusting rod; 723. Slide groove; 724. Slider; 8. Pressure sensor; 9. Gluing device; 91. Glue scraper roller; 92. Glue roller; 93. Guide rod; 94. Glue tank; 95. Frame; 10. Paper tube; 11. Adding sponge pad; 12. Pressure block; 13. Pressure display; 14. Square guide block; 15. Controller. Detailed Implementation

[0023] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0024] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0025] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0026] like Figure 2As shown, a method for improving the flatness of parchment paper tubes includes an unwinding frame 1, a gluing device 9, and a tensioning guide rod assembly 6 disposed at the feed end of the gluing device 9. The gluing device 9 includes a frame 95, a glue tank 94 disposed on the frame 95, a gluing roller 92 driven by a motor disposed on the glue tank 94, a scraper roller 91 disposed on one side of the gluing roller 92, and a plurality of guide rods 93 disposed at the discharge end of the frame 95. The unwinding frame 1 and the tensioning guide rod assembly 6 are connected together. A wetting tank 3 is provided between the rod assemblies 6, and a leveling component 7 is provided between the tensioning guide rod assembly 6 and the glue tank 94. A water control component 4 is provided at the discharge end of the wetting tank 3. The parchment paper on the unwinding frame 1 is wetting in the wetting tank 3 and the humidity is controlled by the water control component 4 and the surface dust is scraped off before being pulled to the tensioning guide rod assembly 6. Finally, the parchment paper is leveled by the tension and the leveling component 7 and then enters the gluing roller 92 for single-sided gluing.

[0027] During the feeding and conveying process of the colored parchment roll 2, the existing equipment was improved by adding an impregnation tank 3 for wetting the colored parchment paper between the existing unwinding frame 1 and the tensioning guide rod assembly 6. Simultaneously, a water control assembly 4 was added to the discharge end of the impregnation tank 3 to control the humidity of the impregnated colored parchment paper. The existing pressure block 12 structure was removed, and the pressure block 12 area was replaced by a leveling assembly 7. This allows the parchment paper, after entering the impregnation tank 3 for wetting, to have its tensile strength improved through humidity control, making it less prone to breakage when pulled by the gluing roller 92. Furthermore, the combination of water and the water control assembly 4 effectively removes dust adhering to the surface of the colored parchment paper, ensuring a clean surface. After simple leveling by the leveling component 7, the paper can be smoothly drawn into the gluing roller 92 for single-sided gluing. The surface of the colored parchment paper is even smoother when drawn onto the paper tube 10 after gluing. The improved paper tube 10, with parchment paper adhering to its surface, exhibits significantly enhanced surface smoothness. This allows the slit paper tube 10 to effectively meet the requirements for high-speed winding and spinning of ultra-fine chemical fiber filaments below 0.55 dtex, making it less prone to snagging or breakage when the filaments are wound onto the paper tube 10. This plays a crucial role in the high-speed winding and unwinding of ultra-fine chemical fiber filaments. Furthermore, after moisture control treatment of the colored parchment paper, no breakage due to excessive tension has occurred during production.

[0028] A further improvement is that the water in the immersion tank 3 is warm water, and the temperature of the warm water is 60~75℃.

[0029] Because the parchment paper passes through the impregnation tank 3 quickly and for a short time, although room temperature water can achieve an impregnation effect, tearing still occurs during the production process. The tensile strength of the parchment paper itself is not effectively improved, resulting in insufficient tensile strength and hindering further improvement in the smoothness and flatness of the finished paper tube 10. Therefore, it is necessary to control the temperature of the water in the impregnation tank 3. When the water temperature is above 60℃, not only is the impregnation efficiency improved, but the tensile strength of the parchment paper is also effectively improved, allowing for a greater tensile force. By controlling the water temperature, production efficiency and tensile strength are effectively improved, resulting in a wider stretchable range. The finished paper tube 10, after tensile strength control, can be smoother and flatter, effectively meeting the surface smoothness requirements of the paper tube 10 during high-speed winding and spinning of ultra-fine chemical fiber filaments below 0.55 dtex. To prevent water loss from being too rapid, the temperature is generally controlled between 60 and 75°C. At around 60 to 65°C, the production cost is lower and the safety is also higher.

[0030] Further improvements include, for example Figure 3 As shown, the leveling component 7 includes 3 to 5 smooth and parallel stainless steel metal rods 71. The parchment paper between the tensioning guide rod component 6 and the gluing roller 92 is pulled in a V-shaped trajectory after being pressed down by the leveling component 7.

[0031] This invention eliminates the need for manual handling of the metal pressure block 12 in traditional processes, thus preventing safety accidents caused by the pressure block 12 falling or being mishandled, and significantly reducing the safety risks for operators. By controlling the water temperature for impregnation and the humidity of the parchment paper, the tension guide rod assembly 6 and the gluing roller 92 no longer need to be flattened by the pressure block 12. Only 3-5 smooth, parallel stainless steel metal rods 71 ​​are needed to press, guide, and control the flatness of the upper surface, achieving a high degree of flatness and preventing wrinkles. Furthermore, without the strong downward pressure of the pressure block 12, the parchment paper is less prone to breakage during traction. Compared to the current method of using stacked pressure blocks 12 for flattening, this method is safer, preventing accidents caused by the pressure block 12 falling off.

[0032] A further improvement is made in that the leveling component 7 also includes an adjustment bracket 72 provided on the frame 95, and the distance between the stainless steel metal rod 71 and the upper end face of the frame 95 can be adjusted by the adjustment bracket 72.

[0033] The vertical position of each stainless steel metal rod 71 can be adjusted by adjusting the bracket 72, which facilitates the passage of parchment paper through the bottom and allows for adjustment of the parchment paper tension, further optimizing the leveling effect. Through the vertical position adjustment function, the leveling component 7 can flexibly adjust according to changes in the thickness of the parchment paper, ensuring that the leveling effect is always optimal.

[0034] A further improvement is made to the adjusting bracket 72, which includes L-shaped connecting seats 721 at both ends of the stainless steel metal rod 71, a plurality of sliding grooves 723 on the L-shaped connecting seats 721, a slider 724 in the sliding grooves 723, and an adjusting rod 722 on the L-shaped connecting seats 721 for adjusting the slider 724 up and down.

[0035] The L-shaped connecting seat 721 is fixed to the frame 95 by screws or other structures, while the two ends of the stainless steel metal rod 71 are fixed to the slider 724. By controlling the adjusting rod 722, the two ends of the slider 724 can slide up and down along the slide groove 723, thereby realizing the height position adjustment of the two ends of the stainless steel metal rod 71. The adjustment method is simple and convenient.

[0036] A further improvement to the above scheme is that a pressure sensor 8 is provided between the adjusting rod 722 and the slider 724, and pressure displays 13 are provided on both sides of the frame 95 to display the pressure values ​​of each pressure sensor 8 on the current side; at least one of the stainless steel metal rods 71, after being adjusted by the adjusting rod 722, can form a clamping force with the upper end face of the frame 95 to clamp the parchment paper.

[0037] Currently, when using pressure block 4 for clamping, the fixed weight of the pressure block makes it easy to cause insufficient gravity and poor flatness when increasing the weight, or even sudden breakage of the face paper due to a sudden increase in pressure. Adjusting the adjusting rod 722 using the combination of pressure display 13 and pressure sensor 8 allows for control based on specific data, achieving optimal pressure. This precise adjustment of the pressure on the paper tube face paper ensures a smoother surface, higher flatness, and better winding tightness after forming, while preventing breakage due to excessive pressure. During the process of pressing and flattening the parchment paper using the stainless steel metal rod 71, since both ends can be adjusted up and down, slight tilting can easily occur on both sides after adjustment, resulting in a poor flatness. Therefore, a pressure sensor 8 is added between the slider 724 and the adjusting rod 722. After adjustment, the flatness can be judged by observing the pressure values ​​corresponding to the 13 lines on both sides of the pressure display during the production process. At the same time, the tilt of the stainless steel metal rod 71 can also be finely adjusted by displaying the pressure values. After the pressure balance adjustment of both sides of the parchment paper by the stainless steel metal rod 71 is achieved, the flatness is improved.

[0038] In particular, at least one of the multiple stainless steel metal rods 71 ​​can be adjusted via the adjusting rod 722 to allow the bottom of the parchment paper to adhere to the upper surface of the frame 95, thus fulfilling the function of the original pressure block 12. This also solves the problem of parchment paper easily breaking due to uncontrollable pressure in the pressure block 12. Through on-site observation and the intuitive representation of pressure figures, the clamping force between the upper surface of the frame 95 and the stainless steel metal rods 71 ​​on the parchment paper can be gradually increased, thereby achieving a better flattening effect without breaking the parchment paper.

[0039] Further improvements include, for example Figure 4 As shown, the water control component 4 includes an adjustment frame 41 on both sides of the discharge end of the immersion tank 3 and two pressure rollers 43 between the adjustment frame 41. The parchment paper that is discharged from the water is squeezed by the two pressure rollers 43 to remove excess water.

[0040] In terms of technology, this invention achieves precise control of the parchment paper impregnation process by introducing a combined temperature and humidity control system. This system allows for real-time adjustment of the parchment paper's material properties, thickness variations, and production line traction speed, thereby adjusting the water temperature in the impregnation tank 3 and the impregnation time of the parchment paper within the tank. This ensures that the paper achieves optimal tensile strength while maintaining ideal humidity levels, providing optimal process conditions for subsequent leveling and gluing processes. Furthermore, when controlling the water content of the parchment paper, two pressure rollers 43 clamp the paper's two sides to achieve the purpose of scraping off the water. The water control method is simple, convenient, and easy to operate.

[0041] A further improvement is made in that a sponge collar 42 is sleeved on the outer side of the pressure roller 43, and the two sides of the parchment paper are squeezed and drained by the sponge collar 42.

[0042] The standard pressure roller 43 is a metal rod. However, it has been found that while it effectively scrapes away water, it is difficult to control the moisture content of the paper. Insufficient or excessive moisture content can easily occur due to clamping force issues, and it can even break due to excessive clamping force. Therefore, to solve this problem, a sponge collar 42 is fitted over the outside of each pressure roller 43. This allows the parchment paper to be squeezed and drained through the sponge collar 42. This improvement not only solves the problem of difficult moisture control but also prevents the parchment paper from breaking due to rigid clamping. Furthermore, the sponge collar 42 is detachable, facilitating regular replacement and cleaning, effectively preventing dust accumulation from affecting the water control effect and extending the service life of the equipment.

[0043] Further improvements include, for example Figure 4 and Figure 6 The adjusting frame 41 includes a support block 412 with both ends fixed to the side of the immersion tank 3 by bolts, an elongated mounting hole 413 on the support block 412, and an actuator 411 on the top of the support block 412. After the two ends of the pressure roller 43 are inserted into the elongated mounting hole 413, the actuator 411 presses the upper pressure roller 43 downward to form a clamping and squeezing force.

[0044] The tilt angle of the support block 412 can be adjusted by the bolt fixing end, so that the water squeezed out by the pressure roller 43 can flow back into the immersion tank 3. The two ends of the pressure roller 43 are limited by the elongated mounting holes 413. After the pressure roller 43 is limited, the downward squeezing force of the upper pressure roller 43 can be controlled by the upper actuator 411 controlling the top pressure roller 43. It is simple and convenient to control the clamping force of the pressure roller 43.

[0045] The actuator 411 in the water control component 4 is automatically adjusted by a pneumatic or electric actuator. The discharge end of the immersion tank 3 is also equipped with a humidity sensor 5 for detecting the humidity of the sheepskin fabric after water control. The humidity sensor 5 is linked with the actuator 411 for control.

[0046] When controlling the humidity of parchment paper using a combination of water control component 4 and humidity sensor 5, actuator 411 pushes pressure roller 43 to adjust pressure. It typically employs an electric actuator structure such as a cylinder (with a proportional valve) or an electric cylinder. The detection unit uses humidity sensor 5 to detect the humidity of the parchment paper. A controller 15 is installed on one side of the immersion tank 3. The control core of actuator 411 uses a programmable logic controller (PLC). To ensure the stable operation of the entire system and avoid frequent adjustments, the humidity control does not use the "instantaneous value" of humidity to adjust the pressure. Instead, it uses segmented PID control. Adjustment only occurs when the target humidity value set on the PLC's human-machine interface exceeds or falls below a certain range. Specifically, the PLC calculates the difference (deviation) and trend between the current humidity and the target humidity for control. When the humidity deviation is large, the PLC gradually increases the target pressure value; when the humidity approaches the target, the pressure is maintained or fine-tuned.

[0047] The extrusion pressure is automatically adjusted by a pneumatic or electric actuator, avoiding errors from manual adjustment and ensuring the uniformity and stability of the parchment paper's moisture content, further improving production efficiency and product quality. A humidity sensor 5 is fixed to the outside of the immersion tank 3 and is mainly used for online real-time monitoring of the moisture content at the bottom of the parchment paper. The humidity sensor 5 is a non-contact or online sensor. After the parchment paper is squeezed and dehydrated by two pressure rollers 43, it first enters the detection range of the humidity sensor 5 for moisture detection. When the humidity sensor 5 indicates that the surface moisture content is too high, it sends a signal to the actuator 411. The actuator 411 gradually presses the paper to control the moisture content, thus facilitating effective gluing during the gluing process and preventing poor gluing results due to excessive moisture. When the moisture content is too low, the pressure is gradually reduced to ensure uniform and stable moisture content of the parchment paper, avoiding wrinkles or breakage caused by uneven moisture.

[0048] A further improvement is made to the immersion tank 3, which includes a water storage tank 32, a guide roller 33 at the feed end of the water storage tank 32, a heating component 31 inside the water storage tank 32, and a temperature controller outside the water storage tank 32. A temperature sensor is also provided inside the water storage tank 32, and the water temperature inside the tank is controlled by the temperature sensor and the temperature controller.

[0049] The temperature controller is integrated into the controller 15. It controls the water temperature in the water storage tank 32, preventing the water temperature from becoming too low. Especially when combined with a temperature sensor, it allows the water to be reheated after dropping to the set temperature. Furthermore, with the addition of a level sensor and automatic water replenishment device to the immersion tank 3, water can be automatically replenished when the water level falls below the set value, ensuring the continuity and stability of the immersion process and reducing the need for manual intervention.

[0050] Further improvements include, for example Figure 5 As shown, a square guide block 14 is provided on the outermost guide rod 93 at the discharge end of the frame 95. The square guide block 14 can be rotated and its angle adjusted by the guide rod 93. The parchment paper is guided by the corner of the square guide block 14 and then pulled outward along the upper surface of the square guide block 14.

[0051] Currently, the outermost guide rods 93 at the discharge end of the frame 95 are all cylindrical, mainly for scraping off excess glue and guiding. As a result, the contact surface formed by the last guidance of the parchment paper before entering the paper tube 10 is generally an arc-shaped surface. Although they are all smooth surfaces, the arc-shaped surface has the problem of small contact area and limited effective length of flatness, which will affect the flatness of the parchment paper on the surface of the paper tube 10. Although it can meet the surface flatness requirements of the conventional paper tube 10, it will lead to insufficient surface flatness of the paper tube 10 when winding ultra-fine chemical fiber filaments below 0.55dtex. To ensure a smoother and flatter surface for the parchment paper after the paper tube 10 is formed, the outermost cylindrical guide rod 93 was replaced. A new guide rod 93 structure, with cylindrical ends and a rectangular middle section, was created through addition or integral molding. Adjusting the angle of the square guide block 14 allows for better smoothing of the parchment paper during final guidance and glue application. The parchment paper first passes through the right-angle corner of the square guide block 14 for glue application and smoothing, and then undergoes a prolonged, flattened application through the long, flat upper surface. This flat support ensures better flatness of the parchment paper entering the outer surface of the paper tube 10. This allows the formed paper tube 10 to effectively meet the winding requirements of ultra-fine chemical fiber filaments below 0.55 dtex, reducing the defect rate of the paper tube 10 and improving production efficiency while lowering production costs. Furthermore, the right-angle corners of the square guide block 14 provide better smoothing of the parchment paper compared to rounded chamfers.

[0052] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A method for improving the flatness of parchment paper tubes, comprising an unwinding frame (1), a gluing device (9), and a tensioning guide rod assembly (6) disposed at the feed end of the gluing device (9), wherein the gluing device (9) comprises a frame (95), a glue tank (94) disposed on the frame (95), a gluing roller (92) driven by a motor disposed on the glue tank (94), a scraper roller (91) disposed on one side of the gluing roller (92), and a plurality of guide rods (93) disposed at the discharge end of the frame (95), characterized in that: A wetting water tank (3) is provided between the unwinding frame (1) and the tensioning guide rod assembly (6). A leveling component (7) is provided between the tensioning guide rod assembly (6) and the glue tank (94). A water control component (4) is provided at the discharge end of the wetting water tank (3). The parchment paper on the unwinding frame (1) is wetting in the wetting water tank (3) and the humidity is controlled by the water control component (4) and the surface dust is scraped off before being pulled to the tensioning guide rod assembly (6). Finally, the parchment paper is leveled by the tension and the leveling component (7) and then enters the gluing roller (92) for single-sided gluing.

2. The method for improving the flatness of parchment paper on paper tubes according to claim 1, characterized in that: The water in the immersion tank (3) is warm water, and the temperature of the warm water is 60~75℃.

3. The method for improving the flatness of parchment paper on paper tubes according to claim 1, characterized in that: The leveling component (7) includes 3 to 5 smooth and parallel stainless steel metal rods (71). The parchment paper between the tensioning guide rod component (6) and the gluing roller (92) is pressed down by the leveling component (7) and pulled in a V-shaped trajectory.

4. The method for improving the flatness of parchment paper on paper tubes according to claim 2, characterized in that: The water control component (4) includes an adjustment frame (41) on both sides of the discharge end of the immersion tank (3) and two pressure rollers (43) between the adjustment frame (41). The parchment paper that is discharged is squeezed by the two pressure rollers (43) to remove excess water.

5. A method for improving the flatness of parchment paper on paper tubes according to claim 4, characterized in that: The outer side of the pressure roller (43) is fitted with a sponge collar (42), and the two sides of the parchment paper are squeezed and drained by the sponge collar (42).

6. The method for improving the flatness of parchment paper on paper tubes according to claim 4, characterized in that: The adjusting frame (41) includes a support block (412) with both ends fixed to the side of the immersion tank (3) by bolts, an elongated mounting hole (413) on the support block (412), and an actuator (411) on the top of the support block (412). After the two ends of the pressure roller (43) are inserted into the elongated mounting hole (413), the actuator (411) presses the upper end of the pressure roller (43) downward to form a clamping and squeezing force.

7. A method for improving the flatness of parchment paper on paper tubes according to claim 6, characterized in that: The discharge end of the immersion tank (3) is also equipped with a humidity sensor (5) for detecting the humidity of the sheepskin fabric after water control. The humidity sensor (5) is linked and controlled with the actuator (411).

8. The method for improving the flatness of parchment paper on paper tubes according to claim 2, characterized in that: The immersion tank (3) includes a water storage tank (32), a guide roller (33) provided at the feed end of the water storage tank (32), a heating component (31) provided in the water storage tank (32), and a temperature controller provided on the outside of the water storage tank (32). A temperature sensor is also provided in the water storage tank (32), and the water temperature in the tank is controlled by the linkage between the temperature sensor and the temperature controller.

9. A method for improving the flatness of parchment paper on paper tubes according to claim 1, characterized in that: A square guide block (14) is provided on the outermost guide rod (93) at the discharge end of the frame (95). The square guide block (14) can be rotated through the guide rod (93) to adjust the angle. The parchment paper is guided by the corner of the square guide block (14) and then pulled outward along the upper surface of the square guide block (14).

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