Processing method and device for heating and rolling of composite board

Abstract

This invention discloses a processing method and apparatus for heated roll pressing of composite panels, relating to the field of panel processing technology. The method includes: simultaneously feeding raw material panels and modified POE adhesive to obtain a composite blank to be processed; feeding the composite blank to an electric heating assembly, using a temperature sensor to detect and calculate the real-time temperature rise rate of the composite blank, and adjusting the temperature to achieve initial bonding of the adhesive with the raw material panel, obtaining a preliminary composite panel; using a thermal imaging detection device to obtain the uneven heating distribution area of ​​the adhesive layer in the preliminary composite panel, adjusting the insulation temperature of the heat-insulating hot pressing assembly based on the temperature difference in the uneven heating area, and uniformly hot pressing the preliminary composite panel; and obtaining a finished composite panel after cooling in a finished product cooling zone. By setting a stepped heating fusion and combining it with a thermal imaging detection device, the accuracy of temperature control during composite panel processing is improved, thereby improving the quality of the rolled processing of composite panels.

Description

Technical Field

[0001] This invention relates to the field of composite board processing technology, and specifically to a processing method and apparatus for heating and rolling composite boards. Background Technology

[0002] In the manufacturing process of composite panels, especially in the production of metal-based composite panels, the uniform melting and bonding of the adhesive layer plays a decisive role in product quality. Current processing technologies generally employ fixed-temperature heating methods, which are difficult to adapt to the dynamic temperature changes of the panels during transport. When the raw material panels and adhesive enter the heating zone simultaneously, due to differences in thermal conductivity and external environmental interference, localized overheating or underheating of the adhesive layer surface is prone to occur. This uneven heating directly leads to unstable molten state of the adhesive, significantly reducing the bonding strength in some areas, while other areas may degrade due to high temperatures. Ultimately, composite panels are highly susceptible to structural defects such as interface delamination and microcrack propagation during subsequent use, weakening the product's mechanical properties and significantly reducing its overall durability and reliability. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a processing method and apparatus for hot rolling of composite plates. By using modified POE adhesive material in combination with stepped heating and using thermal imaging recognition processing for temperature regulation, uniform hot pressing of the adhesive material is achieved, thereby improving the processing stability and reliability of composite metal plates.

[0004] This invention provides a processing method for heating and rolling composite boards, comprising the following specific steps:

[0005] S1. Pre-treat the raw material sheet by simultaneously feeding the raw material sheet and modified POE adhesive into the pre-pressing assembly to obtain the composite blank to be processed.

[0006] S2. The composite blank to be processed is conveyed to the electric heating assembly, and the composite blank to be processed is driven to pass through several heating units in the electric heating assembly in sequence.

[0007] S3. Real-time temperature of several temperature measuring points of the composite blank to be processed is detected by temperature sensor. The real-time temperature rise rate of the composite blank to be processed is calculated based on the real-time temperature of several temperature measuring points. The temperature is adjusted according to the real-time temperature rise rate and the preset temperature rise rate to complete the melting of adhesive material and the initial bonding of raw material board to obtain preliminary composite board.

[0008] S4. Use a thermal imaging detection device to detect the heat distribution map of the preliminary composite board, obtain the distribution area of ​​uneven heating of the adhesive layer of the preliminary composite board, and adjust the insulation temperature of the heat insulation hot pressing component according to the temperature difference of the uneven heating area to uniformly heat press the preliminary composite board.

[0009] S5. The composite board that has undergone heat insulation and hot pressing uniform treatment is sent into the finished product cooling zone. After cooling in the finished product cooling zone, the finished composite board is obtained, and the winding operation of the finished composite board is completed based on the winding assembly.

[0010] Furthermore, step S1 includes:

[0011] Set up a first unwinding group, a second unwinding group, and a tape unwinding group arranged in a staggered manner. The first raw material sheet is unwound based on the first unwinding group, the second raw material sheet is unwound based on the second unwinding group, and the modified POE adhesive is unwound based on the tape unwinding group.

[0012] The adjustment mechanism adjusts the unwinding positions of the first unwinding group, the second unwinding group, and the tape unwinding group, and the modified POE adhesive is then bonded between the first raw material plate and the second raw material plate.

[0013] Furthermore, step S3 includes:

[0014] Several temperature sensors are set within the arrangement spacing of several pairs of heating rollers in the electric heating assembly, and the real-time temperature of the composite blank to be processed is obtained based on the several temperature sensors.

[0015] Based on the real-time temperature and the real-time conveying rate of the composite blank to be processed, the temperature rise rate of the composite blank to be processed is calculated.

[0016] Temperature is adjusted according to the real-time temperature rise rate and the preset temperature rise rate to complete the melting of the adhesive material and the initial bonding with the raw material board, thereby obtaining a preliminary composite board.

[0017] Furthermore, when the difference between the real-time temperature rise rate and the preset temperature rise rate is ≤1℃ / s, the proportion of adjusting the heating roller temperature is 5%-10%;

[0018] When the difference between the real-time temperature rise rate and the preset temperature rise rate is between 1℃ / s and 2℃ / s, the ratio of adjusting the heating roller temperature should be 10%-20%.

[0019] When the difference between the real-time temperature rise rate and the preset temperature rise rate is between 1℃ / s and 2℃ / s, the ratio of adjusting the heating roller temperature is 20%.

[0020] Furthermore, step S4 includes:

[0021] The thermal imaging detection device is activated to perform a comprehensive scan and acquisition of the surface of the preliminary composite board. At the same time, the insulation equipment is activated and the preset initial insulation temperature is maintained.

[0022] The collected thermal imaging data is preprocessed to reduce noise and generate a heat distribution map of the board surface. The heating temperature of the insulation equipment is then adjusted according to the heat distribution map of the board surface.

[0023] Furthermore, the step of performing noise reduction preprocessing on the collected thermal imaging data to generate a heat distribution map of the board surface, and adjusting the heating temperature of the insulation equipment according to the heat distribution map of the board surface, includes:

[0024] Based on the heat distribution map of the board surface, the average heating temperature of the preliminary composite board is calculated. Based on the average heating temperature, the temperature unevenness region with a marked temperature difference of 1℃~1.5℃ is obtained, and the distribution of the temperature unevenness region is obtained.

[0025] Based on the distribution of uneven temperature areas and the conveying rate of the initial composite board, the temperature change curve of the corresponding area of ​​the heating unit in the insulation section is finely adjusted and output.

[0026] Furthermore, step S5 includes:

[0027] A cooling fan is installed between the heat-insulating hot-pressing assembly and the winding assembly, and the airflow direction of the cooling fan is adjusted to be towards the heat-insulating hot-pressing assembly.

[0028] The composite board, after undergoing uniform heat insulation and hot pressing, is cooled by a cooling fan to obtain the finished composite board.

[0029] The present invention also provides a processing apparatus for heating and rolling composite panels, the processing apparatus being used to perform the processing method;

[0030] The processing device includes an unwinding assembly, a preliminary pressing assembly, an electric heating assembly, a heat-insulating hot pressing assembly, and a winding assembly connected in sequence.

[0031] The electric heating assembly includes several heating units, and a cooling assembly is provided between any two adjacent heating units. The several heating units form a stepped heating module.

[0032] Furthermore, the preliminary pressing assembly includes an adjustment mechanism for centering and bonding the modified POE adhesive between the two raw material sheets.

[0033] Furthermore, the heat-insulating hot-pressing assembly includes a heat-insulating hot-pressing section and a thermal imaging detection device. The thermal imaging detection device is installed at the entrance of the heat-insulating hot-pressing section and is used to detect the heat distribution map of the adhesive layer and identify the distribution area of ​​uneven heating of the adhesive layer.

[0034] The heat-insulating hot-pressing section is equipped with a temperature adjustment component, which can adjust the heat-insulating temperature of the heat-insulating hot-pressing section according to the temperature difference of the unevenly heated area and with reference to the temperature adjustment ratio corresponding to the temperature sensor.

[0035] This invention provides a processing method and apparatus for hot rolling of composite plates. By using modified POE adhesive material in combination with stepped heating and using thermal imaging recognition processing for temperature regulation, uniform hot pressing of the adhesive material is achieved, thereby improving the processing stability and reliability of composite metal plates. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a flowchart of the processing method for heating and rolling composite panels in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the processing device for heating and rolling composite panels in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the structural layout of the processing device for heating and rolling composite boards in an embodiment of the present invention. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please refer to Figures 1 to 3 This invention provides a processing method for heating and rolling composite panels, comprising the following specific steps:

[0042] S1. Pre-treat the raw material sheet by simultaneously feeding the raw material sheet and modified POE adhesive into the pre-pressing assembly 2 to preheat the raw material sheet and modified POE adhesive to obtain the composite blank to be processed.

[0043] Raw material sheets and modified POE adhesive are fed simultaneously and preheated within the preliminary pressing assembly 2 to obtain the composite blank to be processed. Specifically, the raw material sheets and modified POE adhesive can be fed in separately via independent conveying mechanisms, and then aligned and bonded by a simple guiding device. Preheating can be performed before or during the preliminary pressing assembly 2, for example, by contact heating plates or infrared lamps. The preliminary pressing assembly 2 can consist of a pair of simple pressure rollers that apply constant pressure to the material. Alternatively, the raw material sheets and adhesive can be pre-cut to specific dimensions, then stacked manually or by a robotic arm before being fed into the preliminary pressing assembly 2. Preheating can be performed by placing the material in a preheating furnace before feeding it into the pressing assembly.

[0044] S2. The composite blank to be processed is conveyed to the electric heating assembly 3, driving it sequentially through several heating units 31 within the electric heating assembly 3. In this step, the composite blank to be processed is driven sequentially through several heating units 31 within the electric heating assembly 3. Specifically, the composite blank to be processed can be conveyed to the electric heating assembly 3 via a conveyor belt or roller conveyor system. The electric heating assembly 3 can consist of multiple independent heating units 31, such as resistance wire heaters or induction heaters, which can heat at a preset fixed temperature. The blank can pass through these heating units 31 at a constant speed. As another implementation, the blank can be intermittently fed into each heating unit 31, staying in each unit for a period of time to reach the desired temperature, and then moved to the next unit. The temperature of the heating unit 31 can be preset to a fixed value and is not adjusted in real time.

[0045] S3. Real-time temperature of several temperature measuring points of the composite blank to be processed is detected by temperature sensor. The real-time temperature rise rate of the composite blank to be processed is calculated based on the real-time temperature of several temperature measuring points. The temperature is adjusted according to the real-time temperature rise rate and the preset temperature rise rate to complete the melting of adhesive material and the initial bonding of raw material board to obtain preliminary composite board.

[0046] Based on the real-time temperatures of several temperature measurement points, the real-time temperature rise rate of the composite blank to be processed is calculated. Temperature adjustment is then performed based on this real-time temperature rise rate and a preset temperature rise rate to complete the initial bonding of the adhesive material with the raw material sheet, obtaining a preliminary composite sheet. Specifically, the temperature sensor can be a non-contact infrared sensor, positioned at a fixed location on the heating assembly to detect the surface temperature of the blank. The real-time temperature rise rate can be obtained by simply calculating the ratio of the temperature difference between two adjacent temperature measurement points to the time interval. Temperature adjustment can be based on a simple PID controller, linearly adjusting the overall power of the electric heating assembly 3 according to the deviation between the real-time temperature rise rate and the preset temperature rise rate. Alternatively, the temperature sensor can be a contact thermocouple, periodically contacting the blank surface for measurement. The temperature rise rate can be obtained by averaging temperature data over a period of time. Temperature adjustment can employ a segmented control strategy; for example, increasing the heating power when the temperature rise rate is lower than the preset value, and decreasing the heating power when it is higher than the preset value.

[0047] S4. Use thermal imaging detection device 41 to detect the heat distribution map of the preliminary composite board, obtain the distribution area of ​​uneven heating of the adhesive layer of the preliminary composite board, adjust the heat preservation temperature of the heat preservation hot pressing component 4 according to the temperature difference of the uneven heating area, and perform uniform hot pressing on the preliminary composite board.

[0048] In this step, the uneven heating distribution area of ​​the adhesive layer of the preliminary composite board is obtained, and the insulation temperature of the heat-insulating hot-pressing component 4 is adjusted according to the temperature difference of the uneven heating area to uniformly heat-press the preliminary composite board. Specifically, the thermal imaging detection device 41 can perform a one-time scan after the preliminary composite board leaves the electric heating component 3 and before entering the heat-insulating hot-pressing component 4. The heat distribution map can be analyzed by a simple image processing algorithm to identify areas where the temperature deviates significantly from the average value. The insulation temperature of the heat-insulating hot-pressing component 4 can be adjusted as a whole according to the maximum detected temperature difference. For example, if there is a large temperature difference, the overall insulation temperature is increased to promote heat diffusion. As another implementation, the thermal imaging detection device 41 can periodically sample and detect the preliminary composite board. The identification of uneven heating areas can be accomplished by setting a fixed temperature threshold. The temperature adjustment of the heat-insulating hot-pressing component 4 can be based on a preset lookup table, selecting the corresponding insulation temperature according to different temperature difference ranges.

[0049] S5. The composite board that has undergone heat preservation and hot pressing uniform treatment is sent into the finished product cooling zone. After cooling in the finished product cooling zone, the finished composite board is obtained, and the winding operation of the finished composite board is completed based on the winding assembly 5.

[0050] In this step, the finished composite board is obtained after cooling in the finished product cooling zone, and the winding operation of the finished composite board is completed based on the winding assembly 5. Specifically, the finished product cooling zone can be a natural cooling area, in which the composite board is cooled by heat exchange with the ambient air. The cooling time can be fixed according to the production line speed. The winding assembly 5 can be a simple reel driven by a constant torque motor to wind the cooled composite board. As another implementation, the finished product cooling zone can include a water cooling or air cooling device, but its cooling intensity is constant. The winding operation can be completed manually or with the assistance of a simple robotic arm after the composite board has been completely cooled.

[0051] Furthermore, modified POE adhesives refer to polyolefin elastomers grafted with maleic anhydride. These adhesives possess excellent flexibility and bonding properties, effectively meeting the bonding requirements of aluminum materials and playing a crucial connecting role in the preparation of composite panels.

[0052] Multiple heating units 31 and cooling rollers 32 work together to form a multi-stage stepped heating and rolling process, which heats and cools the composite blank in stages and gradually. The purpose is to achieve the gradual melting of the adhesive and the initial bonding of the aluminum material, while controlling the temperature gradient to avoid defects caused by rapid temperature changes.

[0053] This embodiment provides a multi-stage stepped heating and rolling processing method for composite boards, aiming to solve the problems of uneven heating of adhesive materials, high processing costs, low efficiency, and insufficient quality in existing technologies during hot pressing. This method achieves refined control of the composite board processing process through a series of synergistic steps.

[0054] Specifically, in the pretreatment step, the two aluminum materials to be laminated undergo degreasing, oxide layer removal, and drying. Degreasing removes oil and impurities from the aluminum surface to ensure cleanliness for subsequent bonding. Oxide layer removal removes the oxide film from the aluminum surface to improve its surface activity and adhesion strength to the adhesive. Drying removes moisture from the aluminum surface to prevent air bubbles from forming during heating or affecting the bonding effect. Simultaneously, the modified POE adhesive is cut and preheated. Cutting ensures the adhesive dimensions match the aluminum, while preheating provides the adhesive with suitable flexibility for subsequent lamination.

[0055] In the material bonding step, the pretreated modified POE adhesive is centered and bonded between the two aluminum pieces. Centering ensures the adhesive layer is accurately positioned within the composite material, preventing localized poor adhesion or uneven material structure due to misalignment. Controlling bonding precision to avoid offset and wrinkles ensures a uniform initial state of the composite blank, providing a good foundation for subsequent heated rolling and reducing processing problems caused by initial defects.

[0056] In the multi-stage stepped heating and rolling process, the composite blank is fed into a continuous rolling production line equipped with heating units 31, cooling rollers 32, and temperature sensors. Each heating unit 31 consists of multiple pairs of heating rollers, which heat the composite blank through conduction or radiation. A cooling roller 32 is positioned between every two heating units 31 to provide a cooling transition between different heating stages, thereby controlling the rate of temperature change of the composite blank. The temperatures of the heating rollers, cooling rollers 32, and composite blank are monitored in real time by temperature sensors, which can be placed at key locations on the rolling production line to continuously collect temperature data. The real-time temperature is compared with a preset temperature threshold to calculate the temperature difference, and the heating temperature is adjusted according to a preset ratio. For example, when a temperature deviation from the preset value is detected, the system will adjust the power output of the heating unit 31 by a certain ratio based on the magnitude of the temperature difference, thereby achieving multi-stage stepped heating and cooling transition between units. This completes the melting of the adhesive material and the initial bonding with the aluminum material, ensuring that the adhesive material softens uniformly under a controlled temperature environment and initially bonds with the aluminum surface.

[0057] In the heat preservation and hot pressing detection and adjustment steps, after the composite blank is initially bonded, it is sent to the heat preservation and hot pressing section 42 at the end of the production line. Before entering the heat preservation and hot pressing section 42, a thermal imaging detection device 41 is used to detect the heat distribution map of the adhesive layer. This device can acquire the temperature distribution image of the adhesive layer surface non-contactly, thereby identifying areas of uneven heating of the adhesive layer. According to the temperature difference of the uneven heating areas, the heat preservation temperature of the heat preservation and hot pressing section 42 is adjusted accordingly with reference to the temperature adjustment ratio in step S3. For example, if the thermal imaging detection shows that the temperature of a certain area is too low, the heat preservation and hot pressing section 42 will perform local heating adjustment on that area to uniformly heat and press the composite blank, ensuring that the adhesive layer achieves uniform curing and bonding effect throughout the entire board area.

[0058] In the finished product cooling and winding process, the composite board, after undergoing uniform heat insulation and hot pressing treatment, is fed into the finished product cooling zone. A cooling method adapted to the curing requirements of the composite board, such as natural cooling, air cooling, or water cooling, is used to cool the composite board to a stable temperature. Controlling the cooling process is crucial to preventing excessive stress within the composite board. After cooling, the board is wound and cut at a speed matched to the roller speed to obtain the finished composite board. Matching the winding speed with the roller pressing speed prevents tensile or compressive deformation of the board during the winding process.

[0059] Furthermore, after the composite board is processed and prepared, the finished composite board is subjected to quality inspection. This quality inspection process includes first-piece inspection, in-process sampling inspection, finished product full inspection, and sampling weather resistance testing to verify whether the bonding strength, appearance quality, and flatness of the finished product meet the preset processing requirements. First-piece inspection verifies the correctness of the production line setup; in-process sampling inspection monitors the stability of the production process; finished product full inspection ensures that all products leaving the factory meet standards; and sampling weather resistance testing evaluates the product's performance under long-term use conditions.

[0060] Specifically, step S1 includes:

[0061] The first unwinding group 11, the second unwinding group 12, and the tape unwinding group 13 are arranged in a staggered manner. The first raw material sheet is unwound based on the first unwinding group 11, the second raw material sheet is unwound based on the second unwinding group 12, and the modified POE adhesive is unwound based on the tape unwinding group 13.

[0062] Based on the adjustment mechanism, the unwinding positions of the first unwinding group 11, the second unwinding group 12, and the tape unwinding group 13 are adjusted, and the modified POE adhesive material is correspondingly bonded between the first raw material plate and the second raw material plate.

[0063] The staggered arrangement of the first unwinding group 11, the second unwinding group 12, and the tape unwinding group 13 is used to store and release different types of roll materials, namely the first raw material sheet, the second raw material sheet, and the modified POE adhesive. This staggered arrangement design allows each roll material to operate independently during the unwinding process without interfering with each other, and provides physical space for subsequent precise alignment. It also ensures that the first raw material sheet, the second raw material sheet, and the modified POE adhesive can be arranged more compactly in space, thereby improving the overall size and compactness of the equipment.

[0064] Furthermore, both the output ends of the first unwinding group 11 and the second unwinding assembly 12 are provided with a grinding mechanism. Based on the grinding mechanism, the metal sheets conveyed by the first unwinding group 11 and the second unwinding group 12 are initially ground, so that the surfaces of the first raw material sheet and the second raw material sheet are clean and tidy, which can improve the bonding effect of the modified POE adhesive between the first raw material sheet and the second raw material sheet.

[0065] Furthermore, the unwinding unit ensures that various rolls of material are fed out smoothly and continuously, providing stable input for subsequent processing steps. It drives the roll shaft to rotate via a drive motor, and, in conjunction with a tension sensor and brake, precisely controls the unwinding speed and material tension to prevent material slack or overstretching. The adjustment mechanism is a key component for precisely adjusting the position of the unwinding unit. Its purpose is to ensure that different layers of material are accurately aligned before entering the preliminary pressing assembly 2, allowing the modified POE adhesive to be precisely sandwiched between the two layers of raw material sheets. The adjustment mechanism can use an electric lead screw or hydraulic / pneumatic cylinder as an actuator, driving the unwinding unit to move laterally or longitudinally via the control system, or using a manual adjustment handwheel in conjunction with a worm gear mechanism for fine position adjustment. Adjusting the unwinding position, by changing the relative positions of each unwinding unit, achieves precise control of the multi-layer material feeding path, ensuring that the adhesive is accurately positioned between the two layers of raw material sheets.

[0066] Precise alignment ensures that the adhesive is evenly distributed between the two layers of raw material boards, laying the foundation for subsequent heating and pressing, and avoiding poor adhesion or product defects caused by misalignment.

[0067] The solution in this application achieves independent and controllable unwinding of different types of roll materials by setting up a staggered arrangement of a first unwinding group 11, a second unwinding group 12, and a tape unwinding group 13. The first unwinding group 11 and the second unwinding group 12 are responsible for conveying the first raw material sheet and the second raw material sheet, respectively, while the tape unwinding group 13 is responsible for conveying the modified POE adhesive. This staggered arrangement design ensures that the roll materials do not interfere with each other during the unwinding process and provides a spatial basis for subsequent precise alignment. Based on this, the relative feeding paths of each layer of material can be dynamically changed by precisely adjusting the unwinding positions of these unwinding groups through an adjustment mechanism. When it is necessary to precisely bond the modified POE adhesive between the first raw material sheet and the second raw material sheet, the adjustment mechanism will fine-tune the lateral or longitudinal positions of each unwinding group according to preset or real-time feedback position information to ensure that the adhesive can be accurately centered and clamped between the two layers of raw material sheets before entering the preliminary pressing component 2. This collaborative working mechanism ensures precise alignment and stable delivery of multi-layer materials from the source, providing high-quality composite blanks for subsequent preliminary pressing and heating processes.

[0068] Specifically, the embodiments of the present invention enable precise alignment and stable conveying of multi-layer raw material sheets and modified POE adhesive. The staggered unwinding group design allows each layer of material to be unwound independently, avoiding mutual interference. The introduction of an adjustment mechanism provides the ability to finely adjust the position of each unwinding group, ensuring that the modified POE adhesive is accurately clamped between the first and second raw material sheets. This significantly improves the interlayer alignment accuracy and adhesive layer uniformity of the composite preform to be processed, effectively avoiding quality defects in the composite sheet caused by material misalignment, wrinkles, or adhesive layer deviation. This provides high-quality semi-finished products for subsequent heat pressing processing, improving overall production efficiency and product qualification rate.

[0069] Specifically, step S3 includes:

[0070] Several temperature sensors are arranged within the spacing of several pairs of heating rollers in the electric heating assembly 3. These sensors acquire the real-time temperature of the composite billet to be processed. The purpose of this arrangement is to optimize the sensor placement, enabling more direct and accurate monitoring of the temperature changes of the composite billet during the heating process. This ensures that the acquired real-time temperature data is more representative, thus providing a reliable basis for subsequent temperature rise rate calculations and temperature regulation. As one implementation method, the temperature sensors can be non-contact infrared sensors that directly measure the surface temperature of the passing composite billet; or, the temperature sensors can be contact thermocouples that indirectly reflect the billet temperature through contact with the surface of the heating rollers.

[0071] Based on the real-time temperature and the real-time conveying rate of the composite billet to be processed, the temperature rise rate of the composite billet is calculated. The temperature rise rate is not only related to the heat input, but also closely related to the residence time of the billet in the heating zone (i.e., the conveying rate). By incorporating the conveying rate into the temperature rise rate calculation, the temperature change of the billet per unit time can be more accurately reflected, thereby improving the accuracy of temperature control. Specifically, the temperature rise rate can be calculated by measuring the temperature difference between two adjacent temperature sensors and combining it with the time required for the billet to pass through these two sensors (determined by the conveying rate and the sensor spacing); alternatively, the temperature rise rate can be calculated by using temperature data collected by a single sensor at continuous time points, combined with the conveying rate, through differential or regression analysis methods.

[0072] Temperature is adjusted based on the real-time temperature rise rate and the preset temperature rise rate to complete the initial bonding of the adhesive material with the raw material board, obtaining a preliminary composite board. The accurately calculated real-time temperature rise rate is compared with the preset ideal temperature rise rate, and the heating power of the electric heating component 3 is adjusted based on the deviation between the two. This closed-loop control based on the temperature rise rate ensures that the adhesive material melts uniformly at a controlled speed throughout the heating process and achieves stable initial bonding with the raw material board. For example, a proportional-integral-derivative (PID) control algorithm can be used, with the difference between the real-time temperature rise rate and the preset temperature rise rate as the controller input, outputting a corresponding heating power adjustment command; alternatively, a segmented adjustment strategy can be adopted based on the magnitude of the temperature rise rate deviation to adjust the temperature of the heating roller by different proportions.

[0073] Furthermore, by precisely setting temperature sensors within the spacing of the heating rollers in the electric heating assembly 3, real-time and localized temperature data of the composite blank to be processed can be obtained at different heating stages. Based on this, combined with the real-time conveying rate of the composite blank, its temperature rise rate is dynamically calculated. This calculation method fully considers the dynamic thermal history of the material in the heating zone, making the assessment of the temperature rise rate more accurate. Subsequently, the system compares this precise real-time temperature rise rate with the preset temperature rise rate and finely adjusts the heating temperature of the electric heating assembly 3. Compared with schemes that rely solely on a few temperature measuring points for coarse temperature rise rate calculations, the solution of this application provides more refined and real-time temperature control, ensuring that the adhesive material melts uniformly at an ideal rate throughout the heating process, thereby achieving stable and high-quality initial bonding of the raw material sheet.

[0074] Specifically, in the electric heating assembly 3, multiple pairs of heating rollers can be arranged in series, with a non-contact infrared temperature sensor between each pair of heating rollers. These sensors continuously monitor the surface temperature of the composite blank as it passes through. Simultaneously, the system acquires the real-time conveying rate of the composite blank. The control unit receives real-time temperature data and conveying rate data from each infrared temperature sensor. For example, when the composite blank moves from the first sensor position to the second sensor position, the control unit records the temperature values ​​at these two positions and calculates the time required for the blank to traverse this distance based on the conveying rate and the sensor spacing. Then, by dividing the temperature difference by the time, the temperature rise rate of that region is accurately calculated. This real-time temperature rise rate is then compared with a preset temperature rise rate curve. If the real-time temperature rise rate is lower than the preset value, the control unit increases the heating power of subsequent heating rollers accordingly; if it is higher than the preset value, it decreases the heating power. In this way, it is ensured that the composite blank remains on the optimal temperature rise path throughout the entire electric heating assembly 3, thereby guaranteeing the uniform melting of the adhesive and the initial bonding quality of the raw material sheet.

[0075] Through the above technical solution, because the temperature sensors are precisely arranged within the spacing of the heating rollers, more representative real-time temperature data can be obtained. Simultaneously, the calculation of the temperature rise rate fully considers the real-time conveying rate of the composite blank to be processed, making the assessment of the temperature rise rate more accurate and dynamic. Temperature adjustment based on this precise temperature rise rate enables refined control of the adhesive melting process, ensuring uniform melting of the adhesive and achieving high-quality initial bonding with the raw material sheet. This significantly improves the quality and consistency of the initial composite sheet, providing a good foundation for subsequent processing steps, thereby effectively avoiding defects in the composite sheet caused by uneven heating or improper temperature rise rate.

[0076] Specifically, the difference between the real-time temperature rise rate and the preset temperature rise rate is a key indicator for measuring the deviation between the actual heating effect and the target heating effect of the composite blank to be processed. This difference can be obtained by subtracting the preset temperature rise rate from the real-time temperature rise rate. The real-time temperature rise rate is usually determined by calculating the temperature change per unit time based on the real-time temperature data collected by several temperature sensors in the electric heating component 3, combined with the real-time conveying rate of the composite blank to be processed. The preset temperature rise rate is an ideal heating curve preset based on factors such as the material properties of the composite board, the melting temperature curve of the adhesive, and the desired processing efficiency.

[0077] In this embodiment, the heating adjustment scheme of the electric heating component 3 is as follows:

[0078] When the difference between the real-time temperature rise rate and the preset temperature rise rate is ≤1℃ / s, the temperature of the heating roller should be adjusted by 5%-10%.

[0079] When the difference between the real-time temperature rise rate and the preset temperature rise rate is between 1℃ / s and 2℃ / s, the ratio of adjusting the heating roller temperature should be 10%-20%.

[0080] When the difference between the real-time temperature rise rate and the preset temperature rise rate is between 1℃ / s and 2℃ / s, the ratio of adjusting the heating roller temperature is 20%.

[0081] The ratio for adjusting the heating roller temperature refers to the magnitude by which the set temperature of the heating roller in the electric heating assembly 3 is adjusted when a deviation between the real-time temperature rise rate and the preset temperature rise rate is detected. This ratio can be expressed as a percentage relative to the current set temperature of the heating roller. For example, when it is necessary to increase the heating temperature, the set temperature of the heating roller is increased by a percentage value; when it is necessary to decrease the heating temperature, it is decreased by a percentage value. Furthermore, this ratio can also be converted into a specific temperature increment or decrement, for example, increasing or decreasing the set temperature of the heating roller by X degrees Celsius, where X is a specific value calculated based on this ratio.

[0082] Furthermore, the above-mentioned temperature regulation scheme based on the real-time temperature rise rate and the preset temperature rise rate was optimized by introducing a segmented and differentiated temperature regulation strategy. Specifically, when the difference between the real-time temperature rise rate and the preset temperature rise rate is small (e.g., ≤1℃ / s), the system uses a small adjustment ratio (5%-10%) to fine-tune the temperature of the heating roller to achieve precise control and avoid temperature fluctuations caused by over-adjustment. When the difference is in a medium range (e.g., 1℃ / s~2℃ / s), depending on the specific process requirements and response speed requirements, a moderate adjustment ratio of 10%-20% can be selected, or a 20% adjustment ratio can be used for faster compensation. This mechanism of dynamically adjusting the adjustment ratio according to the magnitude of the deviation allows the heating process to respond more accurately to the actual temperature rise, ensuring that the composite blank to be processed is always in the optimal heating state, thereby effectively solving the limitations of a single adjustment strategy when facing different degrees of deviation.

[0083] Based on the difference between the real-time temperature rise rate and the preset temperature rise rate, a graded and differentiated temperature adjustment ratio for the heating rollers is adopted. This refined control strategy avoids temperature oscillations caused by over-adjustment at small deviations and ensures rapid and effective compensation at large deviations, thereby significantly improving the stability and accuracy of the heating process. This helps ensure the full and uniform melting of the adhesive material, promotes the initial bonding quality of the raw material boards, effectively reduces the defect rate of composite boards caused by improper temperature control, and thus improves the overall product quality and production efficiency.

[0084] Specifically, step S4 includes:

[0085] The thermal imaging detection device 41 is activated to perform a comprehensive scan and acquisition of the surface of the preliminary composite board. At the same time, the insulation equipment is activated and the preset initial insulation temperature is maintained.

[0086] The collected thermal imaging data is preprocessed to reduce noise and generate a heat distribution map of the board surface. The heating temperature of the insulation equipment is then adjusted according to the heat distribution map of the board surface.

[0087] The thermal imaging detection device 41 is a non-contact measuring device that generates a thermal image by detecting the infrared radiation emitted from the surface of an object, thereby reflecting the temperature distribution on the surface of the object. Its function is to obtain preliminary temperature information of the surface of the composite board in order to identify areas of uneven heating.

[0088] The thermal imaging detection device 41 can employ an infrared thermal imager to continuously or intermittently acquire images of the surface of the preliminary composite board as it passes through using line scanning or area scanning; or it can employ an array of multiple fixed-position infrared temperature sensors to acquire temperatures at multiple points along the width of the preliminary composite board, and generate an approximate heat distribution map through data interpolation or image reconstruction techniques. The insulation equipment is used to maintain the overall temperature of the preliminary composite board during hot pressing, preventing it from cooling too quickly and providing a basis for subsequent local temperature adjustment. The preset initial insulation temperature is a reference temperature pre-set based on the melting characteristics of the adhesive and the processing requirements of the board. This insulation equipment can be an insulation box or insulation section with independent heating and temperature control functions, equipped with heating elements and temperature sensors, and achieving precise temperature control through a PID controller, etc.; or it can be part of the insulation hot pressing assembly 4, where its heating plate or heating roller is heated to the preset initial insulation temperature when the thermal imaging detection device 41 is activated, preparing for subsequent uniform hot pressing. The purpose of noise reduction preprocessing on the acquired thermal imaging data is to eliminate or reduce these noises, improve the accuracy and reliability of the data, and provide a high-quality data foundation for subsequent heat distribution map generation and temperature regulation.

[0089] Furthermore, preprocessing methods can employ image processing algorithms such as median filtering and Gaussian filtering to smooth the thermal imaging image and remove salt-and-pepper noise or high-frequency noise; alternatively, frequency domain analysis methods such as wavelet transform and Fourier transform can be used to separate and filter out noise components. Generating a heat distribution map of the board surface is a visualization result of the pre-processed thermal imaging data, intuitively showing the temperature values ​​and spatial distribution of various points on the surface of the preliminary composite board. This map is crucial for identifying areas of uneven heating and for precise temperature adjustment. This map can be generated by mapping the processed temperature data onto a color gradient, where different colors represent different temperature ranges; alternatively, it can be presented in more detail as a 3D surface map or isotherm map to show temperature fluctuations and gradients. Adjusting the heating temperature of the insulation equipment based on the heat distribution map of the board surface is the core step in achieving uniform hot pressing. By analyzing the heat distribution map, areas with excessively high or low temperatures are identified, and instructions are sent to the insulation equipment to adjust the heating temperature of the corresponding areas locally or globally to eliminate temperature unevenness and ensure that the entire board reaches a uniform temperature state during the hot pressing process. If the insulation equipment has zoned heating capability, the surface of the board can be divided into several areas according to the heat distribution map, and the heating unit 31 corresponding to each area can be independently adjusted in temperature; if the insulation equipment is a whole heating system, the overall heating temperature can be finely adjusted according to the maximum or average temperature difference in the heat distribution map to approach the target uniform temperature.

[0090] Specifically, before the preliminary composite board enters the insulation and hot-pressing assembly 4, or at the entrance of the assembly 4, the thermal imaging detection device 41 is activated to comprehensively scan and collect data on the surface of the preliminary composite board to obtain real-time and detailed surface temperature distribution information. Simultaneously, the insulation equipment is activated and maintained at a preset initial insulation temperature to provide a stable thermal environment for the preliminary composite board and prevent drastic temperature changes during the detection process. To ensure the accuracy of the temperature data, the collected thermal imaging data undergoes noise reduction preprocessing to eliminate potential environmental interference or sensor noise, thereby obtaining high-quality temperature data. Based on the processed data, a heat distribution map of the board surface is generated, which visually reflects the temperature differences in various areas of the preliminary composite board surface. Finally, based on this heat distribution map, the system can accurately identify areas of uneven heating and their temperature differences, and adjust the heating temperature of the insulation equipment accordingly. For example, for areas with lower temperatures, the heating power of the corresponding area can be appropriately increased; for areas with higher temperatures, the heating power can be appropriately reduced or cooling can be increased. This closed-loop detection and adjustment mechanism ensures that the adhesive layer of the initial composite board can achieve a more uniform temperature distribution when it enters the subsequent uniform hot pressing stage, thereby significantly improving the pressing quality of the composite board and the performance of the final product.

[0091] Specifically, at the entrance of the insulation and hot pressing assembly 4 after the initial composite board outputs from the electric heating component 3, a high-resolution infrared thermal imager can be installed as a thermal imaging detection device 41. For example, a linear array infrared thermal imager can be used, which can continuously scan the surface of the initial composite board at a rate of hundreds of frames per second to obtain accurate temperature data. Simultaneously, the insulation equipment, such as the preheating section of the insulation and hot pressing assembly 4, integrates multiple independently controlled heating units 31. When the thermal imager is activated, these heating units 31 are uniformly heated to a preset initial insulation temperature of, for example, 150°C. The acquired thermal imaging data, i.e., the raw infrared image, is immediately pre-processed by the image processing unit for noise reduction, for example, by using an adaptive median filtering algorithm to effectively remove random noise and interference from the image, ensuring the accuracy of the temperature data. The processed data is used to generate a heat distribution map of the board surface. This map can be displayed in real time on the operating interface in the form of a pseudo-color image, where different colors represent different temperature ranges, thus intuitively showing the temperature uniformity of the initial composite board surface. Based on this heat distribution map, the control system can identify areas where the temperature deviates from the target value (e.g., 160°C). For example, if the heat distribution map shows that the temperature in the central area of ​​the board is generally more than 2°C lower than the target temperature, while the temperature in the edge area is close to the target temperature, the control system will send a command to the heating unit 31 in the corresponding central area of ​​the insulation equipment to appropriately increase its heating power, for example, by increasing the heating output by 5%, to raise the temperature in that area until the temperature distribution on the entire surface of the board becomes more uniform.

[0092] Specifically, the step of performing noise reduction preprocessing on the collected thermal imaging data to generate a heat distribution map of the board surface, and adjusting the heating temperature of the insulation equipment according to the heat distribution map of the board surface, includes:

[0093] Based on the heat distribution map of the board surface, the average heating temperature of the preliminary composite board is calculated. Based on the average heating temperature, the temperature unevenness region with a marked temperature difference of 1℃~1.5℃ is obtained, and the distribution of the temperature unevenness region is obtained.

[0094] Based on the distribution of the uneven temperature area and the conveying rate of the preliminary composite board, the temperature change curve of the corresponding area of ​​the heating unit 31 in the insulation section is finely adjusted and output.

[0095] By refining the analysis of the heat distribution map on the surface of the preliminary composite board, precise control of temperature uniformity during hot pressing is achieved. First, the average heating temperature of the preliminary composite board is calculated, providing a benchmark for subsequent identification of local temperature deviations. Based on this, according to a preset temperature difference range, areas of uneven temperature distribution, such as localized overheating or undercooling, are precisely identified on the board surface, and their specific distribution is obtained. This process transforms macroscopic information about heat distribution into operable microscopic data. Subsequently, combining the identified distribution of uneven temperature areas with the real-time conveying rate of the preliminary composite board, the system can perform regional, dynamic temperature fine-tuning of the heating unit 31 in the insulation section and output corresponding temperature change curves. This dynamic adjustment mechanism ensures that each local area receives precise heat replenishment or reduction matching its current temperature state during board movement, effectively compensating for localized temperature unevenness and achieving a highly uniform heating state for the entire composite board during the insulation and hot pressing process. Compared to coarse adjustments based solely on the overall heat distribution map, this solution can more accurately locate and resolve localized temperature unevenness issues, significantly improving the processing quality and uniformity of the composite board.

[0096] After thermal imaging scanning of the preliminary composite board, the thermal imaging detection device 41 transmits the acquired infrared image data to an industrial control computer. The computer first performs noise reduction processing on the image data, such as using median filtering or Gaussian filtering, to eliminate environmental interference. Then, image processing software calculates the average temperature of all pixels on the board surface, for example, 150°C. Next, the system iterates through all pixels, identifying areas with temperatures below 148.5°C or above 151.5°C (i.e., a temperature difference between the average and the mean temperature of 1°C to 1.5°C), and marks these areas in the board's two-dimensional coordinate system, forming a temperature unevenness distribution map. For example, a long, low-temperature strip is found on the left edge of the board, while a circular, high-temperature area is found in the center. Simultaneously, the conveying system provides a real-time conveying rate for the preliminary composite board, for example, 0.5 m / s. Based on this information, and considering the physical partitioning of the insulation section heating unit 31 (e.g., the insulation section is divided into multiple independent heating zones), the control computer calculates the temperature adjustment strategy that each heating zone should execute over a future period using a preset control algorithm (e.g., model predictive control). For example, for the heating zone corresponding to the low-temperature area on the left, the system will output a temperature change curve indicating that the temperature will increase by 2°C over the next 10 seconds; for the heating zone corresponding to the high-temperature area in the center, it may output a temperature change curve indicating that the temperature will decrease by 1.5°C over the next 5 seconds. These temperature change curves are sent to the controller of each heating unit 31, thereby achieving precise and dynamic compensation for the local temperature of the board material.

[0097] Through the above technical solution, this application overcomes the limitations of traditional methods that rely solely on a coarse temperature adjustment based on an overall heat distribution map. By precisely calculating the average heating temperature of the initial composite board and identifying localized temperature unevenness areas with temperature differences ranging from 1℃ to 1.5℃ and their distribution, the analysis of heat distribution becomes more refined. Furthermore, by combining the distribution of temperature unevenness areas with the conveying rate of the initial composite board, the corresponding area of ​​the heating unit 31 in the insulation section is fine-tuned, and a temperature change curve is output, achieving dynamic and precise compensation for localized temperatures of the board. This ensures that all areas of the composite board receive highly uniform heating throughout the entire insulation and hot-pressing process, effectively avoiding problems such as decreased adhesive performance or board deformation caused by localized overheating or undercooling, and significantly improving the overall quality and performance stability of the composite board.

[0098] Specifically, step S5 includes:

[0099] A cooling fan 6 is provided between the heat-insulating hot-pressing assembly 4 and the winding assembly 5, and the air supply direction of the cooling fan 6 is adjusted to be towards the heat-insulating hot-pressing assembly 4.

[0100] The composite board, after undergoing uniform heat insulation and hot pressing, is cooled by a cooling fan 6 to obtain the finished composite board.

[0101] The cooling fan 6 is a device used to generate airflow for forced convection heat transfer. Its function is to rapidly cool the composite board by accelerating airflow to remove heat. The cooling fan 6 can be an axial flow fan, centrifugal fan, or cross-flow fan, and its selection can be matched according to the size of the composite board, material properties, and the required cooling rate. Positioning the cooling fan 6 between the insulated hot-pressing assembly 4 and the winding assembly 5 ensures that the cooling process follows the hot-pressing process immediately without interfering with the subsequent winding operation. This arrangement allows the composite board to immediately enter a controlled cooling environment after leaving the high-temperature area. Adjusting the airflow direction of the cooling fan 6 towards the insulated hot-pressing assembly 4 optimizes the cooling effect, ensuring that the airflow acts efficiently and concentratedly on the composite board immediately after leaving the insulated hot-pressing assembly 4, achieving immediate cooling and preventing further heat diffusion within the board or disorderly loss in the air. This can be achieved through the fan's rotation mechanism, an adjustable-angle guide shroud, or by using multiple small fans with adjusted airflow angles. Air cooling refers to the process of using air as a cooling medium to reduce the temperature of an object through forced convection. Its purpose is to quickly and efficiently lower the temperature of the composite board to the temperature required for winding, while avoiding overheating that could lead to deformation or a decline in adhesive performance. Ultimately, through these cooling measures, the composite board temperature reaches the preset value, ensuring stable physical properties for subsequent winding and storage, thus obtaining the finished composite board.

[0102] In the aforementioned processing method for hot rolling of composite panels, the composite panel, after undergoing uniform heat preservation and hot pressing, has a high temperature. If it directly enters the winding assembly 5 for winding, the excessive temperature may cause panel deformation or unstable adhesive performance. This application addresses this by installing a cooling fan 6 between the heat preservation and hot pressing assembly 4 and the winding assembly 5, and adjusting its airflow direction towards the heat preservation and hot pressing assembly 4. This ensures that the composite panel is immediately subjected to forced cooling by the cooling fan 6 after leaving the heat preservation and hot pressing assembly 4. This setup ensures that the composite panel can be quickly and effectively cooled before entering the winding assembly 5. The airflow generated by the cooling fan 6 directly acts on the surface of the composite panel after hot pressing, accelerating heat dissipation and avoiding potential quality problems caused by high temperatures. It also provides suitable temperature conditions for subsequent winding operations. In this way, the cooling process of the entire processing flow is strengthened and optimized, ensuring the quality and production efficiency of the finished composite panel.

[0103] One or more industrial cooling fans 6 can be installed between the outlet end of the insulated hot-pressing assembly 4 and the inlet end of the winding assembly 5. For example, a 5kW axial flow fan with an air volume of up to 10,000 m³ / h can be used. These cooling fans 6 are fixed to the production line frame by adjustable brackets, and their outlets are connected by universal joints or baffle structures to ensure that the airflow direction is precisely directed towards the outlet area of ​​the insulated hot-pressing assembly 4, i.e., the position where the composite board just leaves the hot-pressing area. When the composite board is conveyed out of the insulated hot-pressing assembly 4 at a speed of 0.5 m / s, the cooling fan 6 immediately starts, generating a strong airflow to blow on the upper and lower surfaces of the composite board, achieving rapid air cooling.

[0104] By installing a cooling fan 6 between the heat-insulating hot-pressing assembly 4 and the winding assembly 5, and adjusting its airflow direction towards the heat-insulating hot-pressing assembly 4, the present application's solution can provide immediate and effective air cooling for the composite board that has just completed the heat-insulating hot-pressing process. This significantly improves the cooling efficiency of the composite board and avoids problems such as board deformation, increased internal stress, and damage to the adhesive layer performance caused by insufficient or uneven natural cooling. Simultaneously, rapid cooling allows the composite board to reach the suitable winding temperature more quickly, thereby shortening the production cycle and improving the overall production line's operating efficiency and the quality stability of the finished composite board.

[0105] For details, please refer to Figure 2 and Figure 3 The present invention also provides a processing apparatus for heating and rolling composite panels, the processing apparatus being used to perform the processing method;

[0106] The processing device includes an unwinding assembly 1, a preliminary pressing assembly 2, an electric heating assembly 3, a heat-insulating hot pressing assembly 4, and a winding assembly 5 connected in sequence.

[0107] The electric heating component 3 includes several heating units 31, and a cooling component is provided between any two adjacent heating units 31. The several heating units 31 form a stepped heating module.

[0108] By combining the stepped heating units 31 with cooling components positioned between adjacent units, multi-stage precise temperature control is achieved during the composite board processing. Specifically, the stepped heating module allows the temperature to change gradually at different processing stages, while the cooling components effectively block heat transfer between adjacent heating units 31, preventing localized overheating or underheating of the adhesive layer. This structural design directly addresses the problem of uneven heating of the adhesive layer in existing technologies, which leads to insufficient bonding performance and easy cracking. By controlling the heat distribution in stages, it ensures that the modified POE adhesive is heated uniformly during the melting process.

[0109] Furthermore, the interconnected components of this processing device form a complete temperature control chain: the unwinding assembly 1 provides a foundation for the synchronous transport of the raw material sheet and the modified POE adhesive; the preliminary pressing assembly 2 completes preheating and preliminary bonding; the electric heating assembly 3 achieves precise melting of the adhesive through a stepped heating module; the heat-insulating hot-pressing assembly 4 performs uniform hot pressing based on thermal imaging detection results; and finally, the winding assembly 5 completes the finished product processing. Compared to traditional single heating methods, the stepped heating module combined with the cooling assembly in this application can dynamically adapt to the temperature requirements of different areas, significantly improving the adhesion uniformity between the adhesive layer and the raw material sheet.

[0110] Specifically, the preliminary pressing assembly 2 includes an adjustment mechanism for centering and bonding the modified POE adhesive between the two raw material sheets. This application's solution, by incorporating an adjustment mechanism within the preliminary pressing assembly 2, allows for adjustment of the raw material sheets and modified POE adhesive before or during their entry into the assembly. Specifically, when the first and second raw material sheets and the modified POE adhesive are synchronously conveyed through their respective unwinding groups, the adjustment mechanism adjusts the lateral position of the modified POE adhesive in real-time or periodically according to a preset alignment standard, ensuring it is precisely positioned between the first and second raw material sheets. Once the modified POE adhesive is centered, the pressure rollers of the preliminary pressing assembly 2 apply appropriate pressure, causing the modified POE adhesive to initially bond with the upper and lower raw material sheets. This precise centering and initial bonding effectively avoids problems such as adhesive layer misalignment or displacement, providing a structurally stable composite blank for subsequent steps such as electric heating, adhesive melting, and uniform hot pressing. This ensures the smoothness of the entire processing and the quality of the final composite board. By introducing an adjustment mechanism for precise alignment during the initial pressing stage, the alignment accuracy of the materials can be controlled from the source, significantly improving the production efficiency and product qualification rate of the composite board.

[0111] Furthermore, the adjustment mechanism can consist of a set of laterally movable guide wheels and limiting baffles. For example, after the first and second raw material sheets are drawn out from their respective unwinding groups, the modified POE adhesive is drawn out from the tape unwinding group 13, and all three enter the preliminary pressing assembly 2 simultaneously. At this time, the guide wheels and limiting baffles of the adjustment mechanism can be adjusted according to the preset width and centerline position, and by contacting the edge of the modified POE adhesive, it is precisely guided to be above the centerline of the two raw material sheets. Under the constraint of the guide wheels and limiting baffles, the modified POE adhesive remains centered, and then enters the space between the pressure rollers together with the upper and lower raw material sheets, completing the preliminary bonding under the pressure of the pressure rollers. In addition, the adjustment mechanism can also integrate a vision sensor to monitor the actual position of the modified POE adhesive in real time, and automatically fine-tune the guide wheels or limiting baffles through a servo motor to achieve a higher level of positioning accuracy.

[0112] Specifically, the heat-insulating hot-pressing assembly 4 includes a heat-insulating hot-pressing section 42 and a thermal imaging detection device 41. The thermal imaging detection device 41 is installed at the entrance of the heat-insulating hot-pressing section 42 and is used to detect the heat distribution map of the adhesive layer and identify the distribution area of ​​uneven heating of the adhesive layer.

[0113] The heat-insulating hot-pressing section 42 is equipped with a temperature adjustment component. The temperature adjustment component can adjust the heat-insulating temperature of the heat-insulating hot-pressing section 42 according to the temperature difference of the unevenly heated area and with reference to the temperature adjustment ratio corresponding to the temperature sensor.

[0114] The thermal insulation and hot pressing assembly 4 is a mechanism used to insulate and apply pressure to the preliminary composite board to promote full bonding between the adhesive layer and the board and to eliminate internal stress. The thermal insulation and hot pressing section 42 is the area within the thermal insulation and hot pressing assembly 4 that specifically performs the thermal insulation and hot pressing functions. It typically contains a heating unit 31 and pressure rollers for processing the composite board under specific temperature and pressure conditions. The thermal imaging detection device 41 is a device capable of sensing infrared radiation from an object's surface and converting it into a visible image, used for non-contact measurement and display of the object's surface temperature distribution. Its implementation may include, but is not limited to: using an infrared thermal imager to generate a heat distribution map by detecting the radiation energy in the infrared band; or using an infrared array sensor to simultaneously collect temperature data through multiple detection points and then reconstruct the image. The thermal imaging detection device 41 is located at the entrance of the thermal insulation and hot pressing section 42, aiming to perform real-time and comprehensive heat distribution detection on the preliminary composite board about to enter the thermal insulation and hot pressing section 42, so as to promptly detect and correct potential temperature unevenness problems before subsequent processing. The thermal imaging detection device 41 is used to detect the heat distribution map of the adhesive layer and identify areas of uneven heating. Its function is to provide intuitive and visual information on the surface temperature of the initial composite board and to quantify the temperature differences between different areas, thus providing a data basis for subsequent precise temperature adjustment. The temperature regulation component is a system used to control the temperature of the heating unit 31 in the heat-insulating hot-pressing section 42. Its implementation can include, but is not limited to: using a temperature controller based on a PID (proportional-integral-derivative) control algorithm to adjust the temperature by controlling the power of the heating rod, heating plate, or hot air circulation system; or using a multi-zone independent temperature control system to achieve fine-grained local temperature adjustment by separately controlling the heating units 31 in different areas within the heat-insulating hot-pressing section 42. The temperature regulation component can adjust the insulation temperature of the heat-insulating hot-pressing section 42 according to the temperature difference in unevenly heated areas and with reference to the temperature adjustment ratio corresponding to the temperature sensor. Its function is to achieve adaptive, regional temperature control of the heat-insulating hot-pressing section 42. By analyzing the data provided by the thermal imaging detection device 41, areas with low or high temperatures are identified, and the heating power of the corresponding areas is precisely adjusted according to the preset adjustment strategy to eliminate temperature unevenness and ensure that the composite board is heated evenly during the heat preservation and hot pressing process.

[0115] In the aforementioned processing apparatus for heating and rolling composite boards, the preliminary composite board, after being preliminarily bonded to the raw material board by the electric heating component 3 through the melting of the adhesive material, is conveyed to the heat-insulating hot pressing component 4. Before entering the heat-insulating hot pressing section 42, a thermal imaging detection device 41 is strategically positioned at the entrance of the heat-insulating hot pressing section 42. This thermal imaging detection device 41 performs a non-contact scan of the surface of the preliminary composite board, acquiring a real-time heat distribution map of its adhesive layer. By analyzing this heat distribution map, the system can accurately identify the distribution areas of uneven heating of the adhesive layer and their specific temperature differences. This real-time, detailed temperature distribution data is then transmitted to the temperature regulation component. Based on the received temperature differences of the unevenly heated areas and referring to a preset temperature regulation ratio corresponding to the temperature sensor data, the temperature regulation component dynamically adjusts the heat-insulating temperature of the heat-insulating hot pressing section 42. For example, for areas with lower temperatures, the temperature regulation component will correspondingly increase the heating power of that area; for areas with higher temperatures, it may reduce the heating power or maintain the existing power. This adaptive temperature control mechanism, based on real-time thermal imaging data feedback, enables the insulated hot-pressing section 42 to precisely compensate for the actual temperature distribution of the initial composite board. This ensures that the adhesive layer of the composite board receives uniform heat as it enters and passes through the insulated hot-pressing section 42, effectively avoiding composite quality problems caused by localized overheating or underheating. In this way, this solution introduces a refined thermal management element into the overall processing flow, significantly improving the uniform hot-pressing effect of the composite board, thereby guaranteeing the quality and performance of the final product.

[0116] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, etc.

[0117] Furthermore, the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A processing method for heating and rolling of a composite sheet, characterized by, The specific steps include the following: S1. Pre-treat the raw material sheet by simultaneously feeding the raw material sheet and modified POE adhesive into the pre-pressing assembly to obtain the composite blank to be processed. S2. The composite blank to be processed is conveyed to the electric heating assembly, and the composite blank to be processed is driven to pass through multiple heating units in the electric heating assembly in sequence. The multiple heating units form a stepped heating module, and each heating unit consists of multiple pairs of heating rollers. S3. Real-time temperature of several temperature measuring points of the composite blank to be processed is detected by temperature sensor. The real-time temperature rise rate of the composite blank to be processed is calculated based on the real-time temperature of several temperature measuring points. The temperature is adjusted according to the real-time temperature rise rate and the preset temperature rise rate to complete the melting of adhesive material and the initial bonding of raw material board to obtain preliminary composite board. S4. Use a thermal imaging detection device to detect the heat distribution map of the preliminary composite board, obtain the distribution area of ​​uneven heating of the adhesive layer of the preliminary composite board, and adjust the insulation temperature of the heat insulation hot pressing component according to the temperature difference of the uneven heating area to uniformly heat press the preliminary composite board. S5. The composite board that has undergone heat insulation and hot pressing uniform treatment is sent into the finished product cooling zone. After cooling in the finished product cooling zone, the finished composite board is obtained, and the winding operation of the finished composite board is completed based on the winding assembly. Step S3 includes: Several temperature sensors are set within the arrangement spacing of several pairs of heating rollers in the electric heating assembly, and the real-time temperature of the composite blank to be processed is obtained based on the several temperature sensors. Based on the real-time temperature and the real-time conveying rate of the composite blank to be processed, the temperature rise rate of the composite blank to be processed is calculated. Temperature is adjusted according to the real-time temperature rise rate and the preset temperature rise rate to complete the melting of the adhesive material and the initial bonding with the raw material board, thereby obtaining a preliminary composite board. Step S4 includes: The thermal imaging detection device is activated to perform a comprehensive scan and acquisition of the surface of the preliminary composite board. At the same time, the insulation equipment is activated and the preset initial insulation temperature is maintained. The collected thermal imaging data is preprocessed to reduce noise and generate a heat distribution map of the board surface. The heating temperature of the insulation equipment is then adjusted according to the heat distribution map of the board surface. The step of performing noise reduction preprocessing on the collected thermal imaging data to generate a heat distribution map of the board surface, and adjusting the heating temperature of the insulation equipment according to the heat distribution map of the board surface, includes: Based on the heat distribution map of the board surface, the average heating temperature of the preliminary composite board is calculated. Based on the average heating temperature, the temperature unevenness region with a marked temperature difference of 1℃~1.5℃ is obtained, and the distribution of the temperature unevenness region is obtained. Based on the distribution of uneven temperature areas and the conveying rate of the initial composite board, the temperature change curve of the corresponding area of ​​the heating unit in the insulation section is finely adjusted and output.

2. The method for processing of composite board heating rolling according to claim 1, characterized in that, Step S1 includes: Set up a first unwinding group, a second unwinding group, and a tape unwinding group arranged in a staggered manner. The first raw material sheet is unwound based on the first unwinding group, the second raw material sheet is unwound based on the second unwinding group, and the modified POE adhesive is unwound based on the tape unwinding group. The adjustment mechanism adjusts the unwinding positions of the first unwinding group, the second unwinding group, and the tape unwinding group, and the modified POE adhesive is then bonded between the first raw material plate and the second raw material plate.

3. The method for processing of the composite board heating roll pressing according to claim 1, characterized in that, When the difference between the real-time temperature rise rate and the preset temperature rise rate is less than 1℃ / s, the temperature of the heating roller should be adjusted by 5%-10%. When the difference between the real-time temperature rise rate and the preset temperature rise rate is between 1℃ / s and 2℃ / s, the ratio of adjusting the heating roller temperature should be 10%-20%. Alternatively, when the difference between the real-time temperature rise rate and the preset temperature rise rate is between 1℃ / s and 2℃ / s, the heating roller temperature is adjusted by 20%. The ratio for adjusting the temperature of the heating roller is the amount by which the set temperature of the heating roller is adjusted when a deviation is detected between the real-time temperature rise rate and the preset temperature rise rate. The ratio is a percentage relative to the current set temperature of the heating roller.

4. The processing method for heating and rolling composite panels according to claim 1, characterized in that, Step S5 includes: A cooling fan is installed between the heat-insulating hot-pressing assembly and the winding assembly, and the airflow direction of the cooling fan is adjusted to be towards the heat-insulating hot-pressing assembly. The composite board, after undergoing uniform heat insulation and hot pressing, is cooled by a cooling fan to obtain the finished composite board.

Images