A drying and setting equipment for honeycomb paper core adaptive homogenization

Abstract

The application discloses a kind of honeycomb paper core self-adapting homogenization's drying setting equipment, it is related to honeycomb paper core drying setting technical field.The equipment includes drying box, conveying mechanism and flexible fluid damping device;Flexible fluid damping device includes support frame, with the multiple flexible damping units of array arrangement, the connecting channel of communication adjacent chamber and the flexible film layer covered on it;Flexible damping unit is filled with liquid fluid medium inside, and using the self-flow of liquid medium between communication chamber, realize the dynamic pressure compensation and self-adapting support of honeycomb paper core unfolding deviation in drying process, simultaneously using medium heat absorption to paper core edge transmission heat, promote cell uniform unfolding and setting, significantly improve the uniformity of honeycomb cell after drying, flatness and size consistency, to enhance the overall mechanical strength and product quality stability of honeycomb paperboard.

Description

Technical Field

[0001] This invention relates to the field of honeycomb paper core drying and shaping technology, and in particular to a honeycomb paper core adaptive homogenization drying and shaping device. Background Technology

[0002] Honeycomb paperboard is composed of double-sided bonded linerboards bonded to a honeycomb paper core. During the processing of honeycomb paperboard, the raw material of the honeycomb paper core is usually folded and needs to be stretched and unfolded. It is understandable that the uniformity of the stretching of the honeycomb paper core directly affects the mechanical properties and dimensional stability of the final product, making it a key process in the production of honeycomb paperboard.

[0003] To achieve effective stretching of honeycomb paper cores, various stretching devices have been developed. For example, Chinese Patent No. CN108437563A discloses a honeycomb paper core stretching machine, which monitors and controls the stretching process by setting two sets of stretching rollers with different speeds and using a damping plate with a pressure sensor. Another example is a honeycomb paper core multiple stretching and shaping mechanism disclosed in CN114311854A, which increases the contact area and friction by having multiple stretching rollers wrap around the paper core.

[0004] However, due to thickness fluctuations in the width and travel directions of the honeycomb paper core, these stretching devices are still prone to uneven unfolding during the stretching process. Furthermore, since the paper core must pass through a free conveying zone after stretching before entering the drying chamber, the stretched and unfolded honeycomb cells are highly susceptible to elastic shrinkage, gravitational collapse, or edge warping after losing effective support and before entering the drying and shaping process. This results in a deviation in geometric state upon entering the drying process compared to when stretching was complete. Uneven initial unfolding or differences in the degree of softening due to heat further increase the deviation of the honeycomb cells, making it difficult to guarantee the uniformity of the honeycomb cells, the flatness of the board surface, and the dimensional consistency of the final product.

[0005] In summary, existing honeycomb paperboard processing equipment suffers from uneven honeycomb paper core unfolding and lacks a solution for dynamic compensation of paper cores with cell deviations, making it difficult to further improve the mechanical properties of the final dried and shaped paper cores. Summary of the Invention

[0006] To address the problems existing in the prior art, the main objective of this invention is to provide a drying and shaping device for adaptive homogenization of honeycomb paper cores. This device can compensate for deviations in the initially unfolded honeycomb paper cores during the drying stage using flexible fluid damping, thereby improving the uniformity of the paper core cells after drying and shaping, and ultimately enhancing the mechanical strength of the honeycomb paperboard.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a drying and shaping device for adaptive homogenization of honeycomb paper cores, comprising: The drying chamber has an internal baking channel; A conveying mechanism, located in the drying chamber, is used to guide the honeycomb paper core to move along the travel direction of the baking channel; and, A flexible fluid damping device is installed inside the drying chamber to provide support and adaptive damping compensation for the moving honeycomb paper core; The flexible fluid damping device includes: The supporting frame has a supporting surface; Multiple flexible damping units are mounted on the support frame in an array and protrude from the support surface. Each flexible damping unit has a sealed chamber inside, which is filled with a liquid fluid medium. A connecting channel connects the chambers of adjacent flexible damping units; A flexible membrane layer is fixed to the support frame and covers the support surface and the upper surface of all flexible damping units.

[0008] As a preferred embodiment, the plurality of flexible damping units are arranged in a two-dimensional array, comprising a plurality of flexible damping units arranged in rows along the width direction of the honeycomb paper core and a plurality of rows of flexible damping units arranged along the direction of travel. The support frame is provided with a first driving mechanism, which drives the entire row of flexible damping units to switch synchronously between a working position in contact with the honeycomb paper core and a non-working position detached from the honeycomb paper core.

[0009] The above scheme arranges multiple flexible damping units into a two-dimensional array comprising rows arranged along the width direction of the honeycomb paper core and rows arranged along the direction of travel. A first driving mechanism is set on the support frame. The entire row of flexible damping units can be driven to switch synchronously between working and non-working positions according to the support requirements of different areas within the honeycomb paper core. This enables the on-demand activation or deactivation of local damping effects, avoids unnecessary interference with the uniformly unfolded area, and adapts to paper core processing with different widths or grid specifications.

[0010] As a preferred embodiment, the flexible fluid damping device further includes a base plate and a base belt; all the flexible damping units are fixedly mounted on the base belt, which is located on the base plate of the support frame; the first driving mechanism drives the base belt to move, so as to realize the switching of the entire row of flexible damping units between the working position and the non-working position.

[0011] The above scheme, by fixing all flexible damping units onto the baseband and setting the baseband on the bottom plate of the support frame, and using the first drive mechanism to drive the baseband to move, achieves synchronous switching of the entire row of flexible damping units between working and non-working positions. This simplifies the drive structure and improves the consistency and reliability of the entire row of units switching, while also facilitating the modular installation and maintenance of the flexible damping units.

[0012] As a preferred embodiment, the flexible fluid damping device further includes at least one pressure roller; the pressure roller is disposed above the flexible membrane layer, and the gap between the pressure roller and the surface of the flexible membrane layer is adjustable; the outer layer of the pressure roller is provided with an elastic support.

[0013] The above scheme involves setting at least one pressure roller above the flexible film layer, making the gap between the pressure roller and the surface of the flexible film layer adjustable, and setting an elastic support body on the outer layer of the pressure roller. During the movement of the honeycomb paper core, an adjustable elastic clamping force is applied to the upper surface of the paper core. This clamping force and the supporting force provided by the flexible damping unit below form a balanced contact stress in the thickness direction of the paper core, enhancing the damping effect of the flexible damping unit on the paper core. At the same time, the compressible deformation characteristics of the elastic support body are used to adapt to the pore profile of the paper core surface, avoiding local overpressure or scratching of the paper core.

[0014] As a preferred embodiment, the flexible fluid damping device further includes a second drive mechanism, wherein the pressure roller is rotatably mounted on the support frame; the second drive mechanism drives the pressure roller to rotate at a rotational speed matching the feed speed of the honeycomb paper core; The elastic support is configured to be made of silicone rubber or fluororubber foam, or to be made of ceramic fiber felt woven into a porous structure.

[0015] The above scheme achieves this by configuring the pressure roller to rotate at a speed matching the feed speed of the honeycomb paper core, keeping the surface of the pressure roller relatively stationary with the surface of the paper core, thus reducing frictional resistance and wear. The elastic support is configured to be made of silicone rubber or fluororubber foam, or to be woven from ceramic fiber felt into a porous structure, enabling the pressure roller to maintain stable elasticity and heat resistance in high-temperature environments, and enhancing air permeability and heat exchange efficiency through the porous structure. The base belt is driven by the second drive mechanism to achieve the switching of the entire row of flexible damping units between working and non-working positions, further optimizing the area-selective control of the damping effect.

[0016] As a preferred embodiment, the flexible damping unit is a strip structure extending along the width direction of the honeycomb paperboard, and the cross-section of the flexible damping unit is trapezoidal, with the upper base of the trapezoid facing upwards.

[0017] By constructing the flexible damping unit as a strip structure extending along the width direction of the honeycomb paperboard, and setting its cross-section in a trapezoidal shape with the top base of the trapezoid facing upwards, the flexible damping unit forms a continuous support band in the width direction of the honeycomb paper core. When uneven expansion of local cells in the paper core causes pressure changes, this strip structure can balance the local pressure difference of a single row of cells along the direction of travel, and at the same time balance the non-uniformity between adjacent rows of cells, thereby improving the uniformity of the cells across the entire width of the paper core after shaping.

[0018] As a preferred embodiment, the size of the trapezoidal upper base of the flexible damping unit is greater than four times the side length of the honeycomb paper core to be processed, and the size of the flexible damping unit in the width direction of the honeycomb paperboard is greater than four times the size of its trapezoidal upper base; the upper base edge of the cross-section of the flexible damping unit is provided with rounded corners.

[0019] By using the above scheme, the size of the trapezoidal upper base of the flexible damping unit is set to be greater than four times the side length of the honeycomb paper core to be processed, and the size of the flexible damping unit in the width direction of the honeycomb paperboard is set to be greater than four times its trapezoidal upper base size. This ensures that the support area of ​​the flexible damping unit covers a sufficient number of cells, so that a single pressure response can act on a local area composed of multiple cells, thereby improving the stability and uniformity of damping compensation. At the same time, rounded corners are set at the upper edge of the cross-section to reduce stress concentration of the flexible film layer at the edge of the unit, extend the service life of the flexible film layer, and avoid causing local indentations to the paper core.

[0020] As a preferred embodiment, the cross-sectional area A and length L of the connecting channel satisfy the following relationship: ; in, This is the preset minimum working pressure difference used to effectively adjust the stretching uniformity of the honeycomb paper core; ν is the dynamic viscosity of the liquid fluid medium; v is the passing speed of the honeycomb paper core; The width of the flexible damping unit; It is a constant greater than 1.

[0021] By imposing quantitative constraints on the flow cross-sectional area A and length L of the connecting channel, the flow characteristics of the liquid fluid medium transferred between the flexible damping unit chambers satisfy the preset relationship. When the local pressure of the honeycomb paper core changes abruptly, the liquid fluid medium can quickly complete the pressure redistribution through the connecting channel with sufficient flow rate, and the pressure drop rate is faster than the pressure accumulation rate when the paper core moves across the surface of a single flexible damping unit. This allows the flexible damping unit to provide an adaptive damping response to the non-uniformity of the pores within and between rows of the honeycomb paper core, thereby achieving dynamic adjustment of the pore uniformity.

[0022] As a preferred embodiment, each of the flexible damping units includes a bladder made of fluororubber, silicone rubber, or polyimide, and the liquid fluid medium is silicone oil, perfluoropolyether oil, or synthetic hydrocarbon oil.

[0023] The above scheme enables the flexible damping unit to maintain stable elasticity, heat resistance, and chemical inertness in the high-temperature environment of the drying chamber by configuring the flexible damping unit as a bag made of fluororubber, silicone rubber, or polyimide, and configuring the liquid fluid medium as silicone oil, perfluoropolyether oil, or synthetic hydrocarbon oil. At the same time, the liquid fluid medium maintains stable dynamic viscosity over a wide temperature range, ensuring that the damping response characteristics remain reliable throughout the drying process.

[0024] As a preferred embodiment, the flexible membrane layer is configured as polytetrafluoroethylene-coated glass fiber fabric polyurethane, and the connecting channel is configured as a stainless steel tube, a polytetrafluoroethylene tube, or a fluororubber hose.

[0025] The above scheme, by configuring the flexible membrane layer as polytetrafluoroethylene-coated glass fiber fabric polyurethane, enables the flexible membrane layer to have good high temperature resistance, wear resistance and low coefficient of friction, reducing frictional resistance when in contact with the honeycomb paper core and extending service life; the connection channel is configured as stainless steel tube, polytetrafluoroethylene tube or fluororubber hose, ensuring that the connection channel maintains structural stability and corrosion resistance in high temperature environment and that the flow cross section does not shrink due to thermal deformation, maintaining the flow capacity and response speed of liquid fluid medium transfer between chambers.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, a flexible fluid damping device is provided in the baking channel of the drying and shaping equipment. The flexible fluid damping device includes a flexible damping unit filled with a liquid fluid medium and a flexible film layer covering the flexible damping units arranged in an array. Adjacent flexible damping units are connected through a connecting channel. When the initially unfolded honeycomb paper core travels along the baking channel and comes into contact with the flexible film layer, the difference in resistance caused by the local pore unfolding deviation forces the corresponding flexible damping unit to bear different pressures. This pressure drives the liquid fluid medium to flow autonomously between adjacent chambers, realizing the real-time redistribution and dynamic balance of the supporting pressure, thereby effectively compensating for the pore unfolding deviation left by the paper core before entering the drying process due to thickness fluctuations, insufficient initial unfolding, shrinkage of the free transport area, or uneven softening by heat. Meanwhile, the flexible damping unit absorbs ambient heat energy in the baking channel and transfers heat to the edge area of ​​the paper core, promoting the rapid softening and shaping of the edge holes; Ultimately, dynamic compensation and geometric shaping of the honeycomb paper core unfolding deviation are achieved, so that the paper core is shaped in a state of full unfolding of the cells and flatness of the entire surface. This improves the uniformity of the honeycomb cells, the flatness of the board surface and the dimensional consistency after drying, thereby enhancing the overall mechanical strength and product quality stability of the honeycomb paperboard. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of a drying and shaping device according to an embodiment of the present invention; Figure 2 This is a front perspective three-dimensional structural diagram of a drying and shaping device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the main cross-sectional structure of a drying and shaping device according to an embodiment of the present invention; Figure 4 This is a front cross-sectional view of the drying and shaping equipment according to an embodiment of the present invention in the state of installing the honeycomb paper core; Figure 5 This is a schematic front view cross-sectional view of the flexible fluid damping device of the drying and shaping equipment according to an embodiment of the present invention; Figure 6 It is based on the present invention Figure 5 A partially enlarged structural diagram; Figure 7 This is a top view cross-sectional structural diagram of the flexible fluid damping device of the drying and shaping equipment according to an embodiment of the present invention.

[0028] Reference numerals: 10. Drying chamber; 11. Electric heating radiant plate; 12. Hot air circulation device; 20. Conveying mechanism; 21. Input traction roller; 22. Output traction roller; 23. First conveying platform; 24. Second conveying platform; 30. Flexible damping unit; 41. Support frame; 42. Connecting channel; 43. Flexible film layer; 44. First driving mechanism; 45. Base plate; 46. Base belt; 50. Pressure roller; 90. Honeycomb paper core. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] like Figures 1 to 7 The image shows a drying and shaping device for adaptive homogenization of honeycomb paper cores according to an embodiment of the present invention. The drying and shaping device includes a drying chamber 10, a conveying mechanism 20, and a flexible fluid damping device.

[0031] The drying chamber 10 has an internally sealed baking channel, which is a horizontally penetrating chamber structure. An electric heating radiant plate 11 is installed on the top of the inner wall of the baking channel to heat the temperature inside the channel to a preset temperature, typically within the range of 70~100℃. A hot air circulation device 12 is installed outside the baking channel to achieve temperature uniformity within the channel. The baking channel is used to heat and shape the honeycomb paper core 90 passing through it.

[0032] A conveying mechanism 20 is located within the drying chamber 10. The conveying mechanism 20 includes an input traction roller 21 and an output traction roller 22, respectively located at the inlet and outlet of the baking channel. The input traction roller pulls the honeycomb paper core 90 into the baking channel, and the output traction roller pulls the baked and shaped honeycomb paper core 90 out of the baking channel. The conveying mechanism 20 also includes a first conveying platform 23 and a second conveying platform 24, arranged within the baking channel and along the travel direction, for guiding the paper core through the baking channel. The first conveying platform 23 is located near the input traction roller 21, and the second conveying platform 24 is located near the output traction roller 22. The length of the second conveying platform 24 is greater than the length of the first conveying platform 23. A flexible fluid damping device is located between the first conveying platform 23 and the second conveying platform 24. The first conveying platform 23 and the second conveying platform 24 each have flush bearing surfaces for guiding the honeycomb paper core 90 to move stably along the travel direction.

[0033] The flexible fluid damping device is installed inside the drying chamber 10 and located in the baking channel, between the first and second conveying platforms, to provide adaptive support and damping compensation for the moving honeycomb paper core 90. The flexible fluid damping device includes a support frame 41, a flexible damping unit 30, a connecting channel 42, and a flexible membrane layer 43.

[0034] In detail, the support frame 41 is welded from steel and fixed to the bottom of the drying chamber 10. The upper surface of the support frame 41 has a flat support surface. Multiple flexible damping units 30 are arranged in an array on the support frame 41. Each flexible damping unit 30 protrudes from the support surface. Each flexible damping unit 30 is a closed, flexible bladder made of polyimide film, with an internal chamber filled with dimethyl silicone oil as the liquid fluid medium. The filling volume is 80% to 90% of the total chamber volume, leaving some empty space to provide necessary compressibility and flexibility. In the array of flexible damping units 30, the chambers of adjacent flexible damping units 30 are interconnected through connecting channels 42, forming a closed network where internal fluid pressure can be dynamically transmitted and balanced. The connecting channels 42 are polytetrafluoroethylene hoses with an inner diameter of 3-5 mm. The periphery of the flexible membrane layer 43 is tensioned and fixed to the support frame 41 by pressure strips, completely covering the support surface and the upper surface of all flexible damping units 30. The flexible membrane layer 43, covering the support surface of the support frame 41, is flush with the bearing surfaces of the first and second conveying platforms, and provides continuous and smooth support for the honeycomb paper core 90. The flexible membrane layer 43 is a composite film of polytetrafluoroethylene-coated glass fiber fabric and polyurethane.

[0035] For ease of understanding, the working principle of this embodiment is as follows: The honeycomb paper core 90 is introduced into the baking channel by the input traction roller, passes sequentially through the bearing surface of the first conveying platform, the flexible film layer 43 above the flexible fluid damping device, and the bearing surface of the second conveying platform, and is pulled out by the output traction roller. The baking channel maintains a baking environment of 70 to 100 degrees Celsius by an electric heating radiation plate and a hot air circulation device. During its movement, the honeycomb paper core 90 softens due to heat, and its lattice geometry becomes more sensitive to external support forces. When the bottom of the honeycomb paper core 90 contacts the flexible film layer 43, if a certain area of ​​the paper core is insufficiently stretched due to initial stretching, the insufficiently stretched area experiences higher resistance and a lower traveling speed; while the stretched area experiences lower resistance and a higher traveling speed. At this time, the insufficiently stretched paper core further unfolds under the resistance, and this reaction increases the local pressure on the corresponding flexible damping unit 30 chamber below, creating a pressure difference between the chamber and the adjacent flexible damping unit 30 chamber. This pressure difference drives the liquid fluid medium to flow from the high-pressure chamber to the low-pressure chamber through the connecting channel 42. As the fluid medium transfers, the flexible damping unit 30 in the high-pressure zone slightly sinks due to the decrease in fluid within the cavity, while the flexible damping unit 30 in the low-pressure zone slightly bulges due to the inflow of fluid. This increases the resistance of these flexible damping units 30 to the unfolded areas and slows their travel speed, ultimately achieving a flush alignment between the under-unfolded and unfolded areas. Simultaneously, the heat from the baking channel also accumulates in the flexible damping unit 30, raising its temperature slightly above the ambient temperature. This ensures that the edges of the paper core in contact with the corresponding position of the flexible film layer 43 are preferentially dried and cured, thus maintaining a uniform unfolded state during subsequent movements.

[0036] Therefore, this embodiment achieves real-time dynamic compensation for local resistance of the paper core and balanced distribution of support pressure, allowing the paper core to pass through the baking channel into the subsequent shaping zone in a uniform contact state across the entire width. Furthermore, this process is entirely driven by the fluid pressure difference, requiring no external sensors or control commands.

[0037] In some embodiments, the arrangement and driving method of the flexible damping units 30 can be further optimized. Specifically, multiple flexible damping units 30 are arranged in a two-dimensional array. Schematic, six flexible damping units 30 are arranged in rows along the width direction of the honeycomb paper core 90, and thirteen flexible damping units 30 are arranged in columns along the direction of travel. In other words, there are 13 rows of flexible damping units 30, with six flexible damping units 30 in each row. All flexible damping units 30 are fixedly mounted on a base strip 46, which is a flexible load-bearing strip made of high-strength fiber-reinforced composite material. The base strip 46 is disposed on the base plate 45 of the support frame 41, and each flexible damping unit 30 is in close contact with the base plate 45 to maintain its position. A second driving mechanism is provided on the support frame 41 for driving the base strip 46 to move in the horizontal direction.

[0038] Schematic, the second drive mechanism includes two rollers, a transmission assembly, and a drive motor. One roller is located below the front side of the support frame 41, and the other roller is located below the rear side. Both ends of the base belt 46 are fixed to the two rollers respectively. The two rollers are interconnected via the transmission assembly for synchronous forward and reverse rotation. The drive motor is connected to one of the rollers via the transmission assembly, causing the base belt 46 to reciprocate relative to the base plate 45, thereby switching the entire row of flexible damping units 30 on the base belt 46 between working and non-working positions. When it is necessary to add flexible damping units 30, the second drive mechanism moves the base belt 46 forward, causing the array of flexible damping units 30 to move, thus moving several rows of flexible damping units 30 located outside the base plate 45 onto the base plate 45. Similarly, when it is necessary to reduce the number of flexible damping units 30, the base belt 46 moves backward, causing several rows of flexible damping units 30 located above the base plate 45 to move out of the base plate 45. (Reference) Figure 5 The 13 individual damping units 30 are arranged in a row along the direction of travel, with 6 located on the base plate and 7 located outside the base plate.

[0039] As can be seen, this embodiment achieves modular and rapid switching of the entire row of flexible damping units 30 through the baseband 46 bearing and quick self-sealing fluid joint technology. This allows for the determination of the balanced resistance required to adapt to the honeycomb paper core 90 to be processed, and can be adapted to different specifications of honeycomb paperboard, thereby improving continuous operation and automation capabilities.

[0040] In some embodiments, the damping compensation effect can be enhanced by adding a pressure roller 50. Specifically, the pressure roller 50 is disposed directly above the flexible film layer 43, and the vertical gap between the pressure roller 50 and the surface of the flexible film layer 43 is adjustable. The outer layer of the pressure roller 50 is covered with an elastic support. The flexible fluid damping device also includes a second drive mechanism, on which the pressure roller 50 is rotatably mounted on the support frame 41 and driven to rotate, the rotation speed of which is configured to match the feed speed of the honeycomb paper core 90. The elastic support is configured to be made of silicone rubber or fluororubber foam, or to be made of ceramic fiber felt woven into a porous structure.

[0041] The number of pressure rollers 50 is determined based on the length of the baking channel and the width of the paper core. In this embodiment, specifically, the pressure rollers 50 are arranged horizontally along the width direction of the honeycomb paper core 90, and their axial length is greater than the maximum width of the honeycomb paper core 90. The two ends of the metal roller core of the pressure roller 50 are mounted on the columns on both sides of the support frame 41 via adjusting seats. The adjusting seats can adopt a screw lifting mechanism, including a nut seat fixed to the column and a screw connected to the roller core bearing seat. By rotating the screw handle or by driving the screw to rotate by a servo motor, the pressure roller 50 can be lifted and lowered as a whole, thereby precisely adjusting the gap between the roller surface and the surface of the flexible film layer 43. The pressure roller 50 is driven to rotate by a second drive mechanism. The second drive mechanism includes a servo motor, a reducer, and a synchronous belt assembly. The servo motor is fixed to the side of the support frame 41, and its output shaft is connected to the driving synchronous pulley through the reducer. The driven synchronous pulley is installed at the end of the roller core of the pressure roller 50, and the synchronous belt transmits power to the pressure roller 50. The speed control signal of the servo motor and the speed control signal of the drive motor of the conveying mechanism 20 are output synchronously by the same control system to ensure that the linear speed of the pressure roller 50 is equal to and in the same direction as the feeding speed of the honeycomb paper core 90. The outer layer of the pressure roller 50 is provided with an elastic support body, which is a sponge-like elastic layer made of foamed silicone rubber or foamed fluororubber, with a thickness of 10 mm to 15 mm and a Shore A hardness of 20 to 40 degrees; or a porous structure layer made of ceramic fiber felt wound and glued together.

[0042] During use, the pressure roller 50 rotates actively at a linear speed equal to the paper core feed speed under the drive of the second drive mechanism, and there is no relative sliding between its roller surface and the upper surface of the paper core. The elastic support undergoes elastic compression deformation under the pressure of the paper core, and the foamed rubber achieves large deformation and adhesion by bending of the bubble walls and gas compression, transforming line contact into surface contact, and achieving uniform pressing on the upper surface of the paper core.

[0043] The clamping force and the adaptive support force applied by the lower flexible damping unit 30 through the flexible film layer 43 form a balanced composite pressure field in the thickness direction of the paper core. When the resistance changes in a local area of ​​the paper core due to thickness fluctuations, uneven unfolding, or differences in heating, the lower flexible damping unit 30 dynamically adjusts the support force through a fluid pressure self-balancing mechanism, while the upper pressure roller 50 maintains continuous contact with the upper surface of the paper core through the follow-up compression deformation of the elastic support body, and the local contact pressure is adaptively fine-tuned with the amount of compression.

[0044] As can be seen, this embodiment applies pressure to the paper core using the elastic pressure roller 50, thereby improving the uniformity of the damping effect formed by the array-type flexible damping unit 30 while avoiding scratches on the paper core surface and fluctuations in traction resistance.

[0045] The flexible damping unit 30 can be configured in various shapes and structures. In some embodiments, the flexible damping unit 30 is a strip-shaped structure extending along the width direction of the honeycomb paperboard, with a trapezoidal cross-section, and is disposed on the support frame 41 with the upper base of the trapezoid facing upwards. The upper base and lower base of the trapezoidal cross-section are parallel, the width of the upper base is smaller than the width of the lower base, and the sidewalls are inwardly inclined slopes. The trapezoidal cross-section of the flexible damping unit 30 is formed by high-frequency heat sealing of a polyurethane film, and the shape of the internal cavity is consistent with the external shape. The upper base edge is provided with a rounded corner with a radius of 2 mm to 5 mm to reduce stress concentration.

[0046] In use, the strip structure extends continuously along the width of the paper core, and a single flexible damping unit 30 can support an entire row of honeycomb cells, enhancing the continuity of lateral support. The trapezoidal cross-section design gives the flexible damping unit 30 a large bottom support area and lateral stability. Under pressure, the outward expansion tendency of the sidewalls is limited, and the main deformation is concentrated in the upper bottom area, which is conducive to the uniform transmission of pressure. The rounded corners of the upper bottom edge eliminate sharp corners, and the flexible membrane layer 43 transitions smoothly at the edge of the unit, making it less prone to fatigue tearing.

[0047] As can be seen, this embodiment enhances the continuity of lateral support and the uniformity of pressure transmission through the strip trapezoidal structure design, improves the structural stiffness and fatigue life of the flexible damping unit 30, and provides a more reliable mechanical basis for the full-width uniformity of the honeycomb paper core 90.

[0048] In a preferred embodiment, adapted to the specifications of the honeycomb paper core 90 raw material, the trapezoidal upper base dimension of the flexible damping unit 30 is greater than four times the side length of the honeycomb paper core 90 to be processed; the dimension of the flexible damping unit 30 in the width direction of the honeycomb paperboard is greater than four times its trapezoidal upper base dimension; the upper base edge of the cross-section of the flexible damping unit 30 is provided with rounded corners. Adaptively, when the side length of the honeycomb paper core 90 is 8 mm, the trapezoidal upper base dimension is designed to be greater than 32 mm, for example, 40 mm; the total dimension of the unit in the width direction is designed to be greater than 160 mm, for example, 200 mm. The rounded corner radius is 3 mm.

[0049] Therefore, the upper surface of a single flexible damping unit 30 can simultaneously support multiple continuously arranged honeycomb cells. When a cell experiences abnormal pressure due to a local defect, the overall pressure change of the flexible damping unit 30 is diluted by the average state of the surrounding cells, preventing drastic disturbances to the local support force caused by a single cell defect. The sufficiently large width of the flexible damping unit 30 ensures that the chamber has sufficient fluid volume, providing adequate pressure buffering and dynamic adjustment margin. The rounded corners of the upper bottom edge are as before to prevent fatigue damage to the membrane layer.

[0050] In a preferred embodiment, the flow cross-sectional area A and length L of the connecting channel 42 satisfy the following relationship: ; in, This is the preset minimum working pressure difference used to effectively adjust the stretching uniformity of the honeycomb paper core at 90°. The dynamic viscosity of the liquid fluid medium; The throughput speed of the honeycomb paper core is 90. The width of the flexible damping unit; For a constant greater than 1, a value of 10 is preferred. Specifically, taking a production speed v = 0.1 m / s, a flexible damping unit width W_bag = 0.15 m, a fluid viscosity η = 0.05 Pa·s, and a preset effective regulating pressure difference ΔP = 1000 Pa as an example, and designing a connection channel length L = 0.05 m, the required flow cross-sectional area A must satisfy A > (C·v·W bag ·L·η) / ΔP = 10×0.1×0.15×0.05×0.05 / 1000 = 3.75×10⁻ 7 The area is approximately 1 square meter, corresponding to a diameter of approximately 0.7 millimeters. In practical engineering, to avoid blockages, a larger cross-sectional area channel can be selected, and the inequality can be satisfied by appropriately increasing the fluid viscosity or adjusting ΔP.

[0051] Therefore, when the paper core sweeps across the surface of the flexible damping unit 30 at high speed, if a pressure difference ΔP is generated between the flexible damping units 30, the fluid needs to pass through the connecting channel 42 with sufficient flow to achieve pressure redistribution. ΔP can be obtained experimentally from honeycomb paper cores 90 with different unfolding states. This relationship ensures that the fluid flow capacity is significantly greater than the rate of local pressure change caused by the paper core movement, making the pressure balancing process always faster than the disturbance accumulation process. Therefore, adaptive damping compensation can operate effectively and promptly at various production speeds, maintaining the uniformity of the paper core.

[0052] In other embodiments, the bladder of each flexible damping unit 30 may also be made of fluororubber or silicone rubber. The liquid fluid medium may also be perfluoropolyether oil or synthetic hydrocarbon oil. The viscosity of the selected dimethyl silicone oil may be between 50 and 1000 centistokes. Under the high-temperature environment of the drying chamber 10, the bladder material must simultaneously withstand thermal aging, dynamic bending fatigue, and compatibility with the fluid medium. Fluororubber, silicone rubber, and polyimide all possess the above-mentioned characteristics, ensuring that the flexible damping unit 30 does not undergo significant swelling, hardening, or leakage during long-term cyclic use. Silicone oil, perfluoropolyether oil, and synthetic hydrocarbon oil have low volatility, high flash point, and suitable viscosity characteristics, ensuring smooth fluid flow and accurate pressure transmission in the channel.

[0053] Therefore, this embodiment ensures the long-term reliable operation of the adaptive damping system under drying conditions and extends the equipment maintenance cycle by selecting high-temperature resistant and fatigue-resistant bag materials and low-volatility and thermally stable fluid media.

[0054] In other embodiments, the flexible membrane layer 43 can also be made of other high-temperature and abrasion-resistant materials. The connecting channel 42 is configured as a stainless steel tube, a polytetrafluoroethylene tube, or a fluororubber hose. Specifically, in this embodiment, the flexible membrane layer 43 uses glass fiber fabric as a reinforcing skeleton, is coated with polytetrafluoroethylene resin on both sides, and then composited with a polyurethane wear-resistant layer, with a total thickness of approximately 1.5 mm. The tensile strength of this composite membrane is greater than 2000 N / mm, the coefficient of friction is less than 0.15, and it can be used for a long time at 180~220℃. The connecting channel 42 is made of different materials depending on the location: the fixed section uses 316L stainless steel tube to ensure rigidity and pressure resistance; the moving section uses polytetrafluoroethylene tube with a smooth inner wall and low flow resistance; the moving part of the base belt 46 uses a fluororubber hose with good flexibility and high temperature resistance. Thus, the flexible membrane layer 43 can withstand the continuous sliding friction and high-frequency elastic deformation of the paper core, the low coefficient of friction reduces the traction resistance of the paper core, the high tensile strength prevents the membrane layer from loosening or tearing, and the non-stick surface properties prevent adhesives or paper scraps from sticking together. The material of the connecting channel 42 is compatible with the fluid medium and can adapt to thermal expansion and contraction and mechanical vibration, ensuring long-term sealing without leakage.

[0055] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0056] In this application, "multiple" refers to two or more. The terms "first," "second," "third," "fourth," etc. (if present), are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The term "and / or" in this application merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this application generally indicates that the preceding and following related objects have an "or" relationship.

[0057] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A drying and shaping device for adaptive homogenization of honeycomb paper cores, characterized in that, include: The drying chamber (10) has a baking channel inside; A conveying mechanism (20), disposed in the drying chamber (10), is used to guide the honeycomb paper core to move along the travel direction of the baking channel; and, A flexible fluid damping device is installed inside the drying chamber (10) to provide support and adaptive damping compensation for the moving honeycomb paper core; The flexible fluid damping device includes: The supporting frame (41) has a supporting surface; Multiple flexible damping units (30) are mounted on the support frame (41) in an array and protrude from the support surface. Each flexible damping unit (30) has a sealed chamber inside, which is filled with a liquid fluid medium. Connecting channel (42) to connect the chambers of adjacent flexible damping units (30); A flexible membrane layer (43) is fixed to the support frame (41) and covers the support surface and the upper surface of all flexible damping units (30).

2. The drying and shaping equipment for adaptive homogenization of honeycomb paper cores according to claim 1, characterized in that, Multiple flexible damping units (30) are arranged in a two-dimensional array, including multiple flexible damping units (30) arranged in rows along the width direction of the honeycomb paper core and multiple rows of flexible damping units (30) arranged along the travel direction; The support frame (41) is provided with a first driving mechanism (44) for driving the entire row of flexible damping units (30) to switch synchronously between a working position in contact with the honeycomb paper core and a non-working position detached from the honeycomb paper core.

3. The drying and shaping equipment for adaptive homogenization of honeycomb paper cores according to claim 2, characterized in that, The flexible fluid damping device also includes a base plate (45) and a base belt (46); all the flexible damping units (30) are fixedly mounted on the base belt (46), which is located on the base plate (45) of the support frame (41); the first drive mechanism (44) drives the base belt (46) to move, so as to realize the switching of the entire row of flexible damping units (30) between the working position and the non-working position.

4. The drying and shaping equipment for adaptive homogenization of honeycomb paper cores according to claim 1, characterized in that, The flexible fluid damping device further includes at least one pressure roller (50); the pressure roller (50) is disposed above the flexible membrane layer (43), and the gap between the pressure roller (50) and the surface of the flexible membrane layer (43) is adjustable; the outer layer of the pressure roller (50) is provided with an elastic support.

5. The drying and shaping equipment for adaptive homogenization of honeycomb paper cores according to claim 4, characterized in that, The flexible fluid damping device further includes a second drive mechanism, wherein the pressure roller (50) is rotatably mounted on the support frame (41); the second drive mechanism drives the pressure roller (50) and is driven to rotate at a rotational speed matching the feed speed of the honeycomb paper core; The elastic support is configured to be made of silicone rubber or fluororubber foam, or to be made of ceramic fiber felt woven into a porous structure.

6. The drying and shaping equipment for adaptive homogenization of honeycomb paper cores according to claim 1, characterized in that, The flexible damping unit (30) is a strip structure extending along the width direction of the honeycomb paperboard. The cross-section of the flexible damping unit (30) is trapezoidal, and the upper base of the trapezoid is facing upward.

7. The drying and shaping equipment for adaptive homogenization of honeycomb paper cores according to claim 6, characterized in that, The size of the trapezoidal upper base of the flexible damping unit (30) is greater than four times the side length of the honeycomb paper core to be processed, and the size of the flexible damping unit (30) in the width direction of the honeycomb paperboard is greater than four times the size of its trapezoidal upper base; the upper base edge of the cross section of the flexible damping unit (30) is provided with rounded corners.

8. The drying and shaping equipment for adaptive homogenization of honeycomb paper cores according to claim 1, characterized in that, The cross-sectional area A and length L of the connecting channel (42) satisfy the following relationship: ； in, This is the preset minimum working pressure difference used to effectively adjust the stretching uniformity of the honeycomb paper core; ν is the dynamic viscosity of the liquid fluid medium; v is the passing speed of the honeycomb paper core; The width of the flexible damping unit; It is a constant greater than 1.

9. A drying and shaping device for adaptive homogenization of honeycomb paper cores according to any one of claims 1 to 8, characterized in that, Each of the flexible damping units (30) includes a bladder made of fluororubber, silicone rubber or polyimide, wherein the liquid fluid medium is silicone oil, perfluoropolyether oil or synthetic hydrocarbon oil.

10. A drying and shaping device for adaptive homogenization of honeycomb paper cores according to any one of claims 1 to 8, characterized in that, The flexible membrane layer (43) is configured as polytetrafluoroethylene coated glass fiber fabric polyurethane, and the connecting channel (42) is configured as a stainless steel tube, a polytetrafluoroethylene tube, or a fluororubber hose.

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