A laser heat melting-based edge band color adjusting device

Abstract

The application is suitable for the technical field of edge band processing, and provides an edge band color adjusting equipment based on laser heat melting, which comprises a laser heat melting head fixedly connected to the top of a shell, the shell being fixedly connected to the upper side of a control cabinet; a semicylindrical limiting block, temperature sensors and pressure sensors being arrayed in the semicylindrical limiting block; a tensioning assembly arranged on one side of the plane of the semicylindrical limiting block, used for clamping the end of the edge band and exerting a dynamic tensioning force along the length direction of the edge band; and a heat dissipation system fixedly connected with the shell, used for discharging hot air in the equipment to the outside, active carbon filter plates being arranged at the air inlet and air outlet of the heat dissipation system. Through arraying temperature sensors and pressure sensors in the semicylindrical limiting block and combining the space integral algorithm executed by the interface heat conductivity rate determination module, the effective interface heat conductivity rate between the edge band and the limiting block can be calculated in real time and with high precision.

Description

Technical Field

[0001] This invention belongs to the field of edge banding processing technology, and particularly relates to an edge banding color matching device based on laser hot melting. Background Technology

[0002] In the edge banding manufacturing industry, laser hot-melt color matching technology, with its concentrated energy, rapid temperature response, and non-contact operation, is gradually replacing traditional hot air or infrared heating processes to achieve precise control of the surface color of edge banding strips. This technology presses the edge banding strip tightly onto the surface of a rotating limiting block and uses a laser beam for rapid scanning and heating, bringing the material to a molten state. It then influences the color diffusion and curing process through temperature field distribution management.

[0003] However, edge banding strips are generally made of high molecular weight polymers such as polyvinyl chloride or acrylonitrile-butadiene-styrene, whose thermodynamic behavior exhibits highly nonlinear characteristics and is extremely sensitive to the coupling effect of temperature and pressure. Current mainstream color matching equipment relies on manually preset fixed laser power and static mechanical tension for operation; this open-loop control mode has significant drawbacks.

[0004] First, the actual thermal conductivity of the interface between the edge banding strip and the limiting block will dynamically evolve with local pressure fluctuations, temperature changes, and the degree of material softening. When constant power heating is used, if the interface thermal conductivity increases due to material softening, a large amount of heat will be conducted to the limiting block instead of being used to increase the temperature of the edge banding strip itself, causing the melting temperature to deviate from the process setting range and seriously damaging the color reproduction accuracy.

[0005] Secondly, during the hot-melt process, the edge sealing strip expands due to heat, and the fixing tension cannot dynamically compensate for the thermal strain, easily causing material wrinkling, loosening, or excessive stretching, further damaging the interfacial contact stability and forming a vicious cycle of thermal-mechanical interaction. Furthermore, the accumulated heat generated by laser radiation, mechanical friction, and heat conduction during equipment operation, if the heat dissipation capacity is insufficient, will cause the temperature of the limiting block substrate to continuously rise, leading to a drift in the reference temperature and making it difficult to maintain consistent color matching effects during long-term continuous production.

[0006] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0007] The purpose of this invention is to provide a color matching device for edge banding strips based on laser hot melting, in order to solve the above-mentioned problems.

[0008] This invention is implemented as follows: a color-matching device for edge sealing strips based on laser hot melting, comprising: A laser hot melt head is fixedly connected to the top of the housing, which is fixedly connected to the upper side of the control cabinet; A semi-cylindrical limiting block is used to limit the edge sealing strip. Temperature sensors and pressure sensors are arrayed in the semi-cylindrical limiting block. A tensioning component is disposed on one side of the plane of the semi-cylindrical limiting block, used to clamp the end of the edge banding strip and apply a dynamic tensioning force along the length direction of the edge banding strip; The drive mechanism is fixedly connected to the control cabinet and is used to drive the semi-cylindrical limit block and the tensioning assembly to reciprocate synchronously. A heat dissipation system is fixedly connected to the outer casing and is used to exhaust hot air from the equipment. Activated carbon filter plates are provided at the air inlet and air outlet of the heat dissipation system. A control system, housed in a control cabinet, is communicatively connected to the temperature sensor, pressure sensor, tensioning assembly, laser hot melt head, and heat dissipation system. The control system includes: The interface thermal conductivity determination module is used to calculate the effective interface thermal conductivity between the edge sealing strip and the semi-cylindrical limiting block based on the local temperature distribution data and local pressure distribution data of the interface collected by the temperature sensor and pressure sensor, combined with the inherent physical properties of the edge sealing strip; wherein, the effective interface thermal conductivity is defined as the equivalent thermal conductivity averaged based on the nominal contact area (i.e. macroscopic coverage area) between the edge sealing strip and the semi-cylindrical limiting block. The tension force determination module is used to calculate the target dynamic tension force to compensate for thermal strain and reduce the deviation between the actual interface thermal conductivity and the target interface thermal conductivity based on the effective thermal conductivity of the interface and the preset process target interface thermal conductivity, and drive the tensioning component to perform the operation. The laser power determination module is used to calculate and adaptively adjust the target control power of the laser hot melt head based on the effective thermal conductivity of the interface and the target dynamic tension force, and on the basis of global energy conservation, to compensate for the loss of heat conducted through interface conduction and to offset the heat generated by mechanical friction. The heat dissipation control module is used to calculate and control the target static pressure required by the exhaust fan of the heat dissipation system based on the target dynamic tension force and the target regulating power, and based on the principles of fluid mechanics and the upper limit of the allowable thermodynamic waste heat inside the equipment.

[0009] A further technical solution is that the calculation method performed by the interface thermal conductivity determination module is as follows: The nominal contact area between the edge banding strip and the semi-cylindrical limiting block is integraled by the area integral. The integrand is the ratio of the intrinsic thermal conductivity of the edge banding material to the characteristic roughness gap. The quotient is then multiplied by the difference between 1 and the exponential function with the natural constant e as the base. The product is then multiplied by the ratio of the local temperature value to the ambient reference temperature. Finally, the area integral result is divided by the nominal contact area to obtain the effective thermal conductivity of the interface. The exponent of this exponential function is the local pressure value divided by the negative value of the Brinell hardness of the edge banding material.

[0010] In a further technical solution, the target dynamic tension force calculated by the tension force determination module consists of a first force component and a second force component; First, calculate the first force component by multiplying the elastic modulus of the edge banding material by the cross-sectional area of ​​the edge banding and then by a difference. The difference is: the ratio of the total elongation of the edge banding to the initial length, minus the product of the linear thermal expansion coefficient and the difference between the global average temperature and the initial entry temperature. The second force component is the radius of the semi-cylindrical limiting block multiplied by the working width and then by the Brinell hardness of the sealing strip material. The result is then multiplied by 1 minus the difference of an exponential function with the natural constant e as the base. The exponent of this exponential function is the difference between the process target interface thermal conductivity and the effective interface thermal conductivity, divided by the process target interface thermal conductivity. The quotient is negative. The first force component and the second force component are added together to obtain the target dynamic tension force.

[0011] A further technical solution is that the laser power determination module calculates the target control power in the following way: First, multiply the reciprocal of the effective absorption rate of the edge banding strip to the laser by the combination of the three terms in square brackets. The first term in square brackets is the difference between the optimal hot-melt temperature required by the process and the global average temperature, multiplied by the density of the edge banding strip material, multiplied by the cross-sectional area, multiplied by the real-time angular velocity of the reciprocating rotation of the semi-cylindrical limiting block, multiplied by the radius, and multiplied by the specific heat capacity. The result represents the energy required to heat the edge banding strip to the hot-melt temperature. The second term is the difference between the global average temperature and the temperature of the solid substrate inside the semi-cylindrical limiting block, multiplied by the effective thermal conductivity of the interface and the nominal contact area. The result represents the heat lost through the contact surface to the limiting block. The third term is the amplification factor of the normal force generated by the contact angle between the edge banding strip and the semi-cylindrical limiting block, multiplied by the dynamic friction coefficient between the surface of the edge banding strip and the semi-cylindrical limiting block, multiplied by the target dynamic tension force, multiplied by the real-time angular velocity, and multiplied by the radius. This term represents the frictional heat generation term. The negative sign is taken before this term to cancel the mechanical frictional heat generation. Add the first term to the second term and subtract the third term, then multiply the result by the reciprocal of the effective absorption rate to obtain the target regulation power.

[0012] In a further technical solution, when the heat dissipation control module calculates the target static pressure, it first calculates the volumetric flow rate of heat to be dissipated, in the following manner: First, subtract the effective absorption rate of the laser by the edge sealing strip from 1, multiply by the target control power, add the normal force amplification factor, multiply by the dynamic friction coefficient between the edge sealing strip and the semi-cylindrical limiting block surface, multiply by the target dynamic tension force, multiply by the real-time angular velocity, and multiply by the radius to obtain the total heat generation power; then divide the total heat generation power by the following product: the difference between the maximum allowable safe ambient temperature inside the equipment and the initial ambient temperature outside the air inlet, multiply by the air density of the exhaust airflow, and multiply by the specific heat capacity of air at constant pressure. The resulting quotient is the volumetric flow rate of the heat to be discharged. Then, the target static pressure is calculated as follows: The first pressure term is the ratio obtained by multiplying the dynamic viscosity of the exhaust airflow by the physical thickness of the activated carbon filter plate and dividing it by the permeability of the porous medium of the activated carbon filter plate, and then multiplying it by the ratio of the volumetric flow rate of the heat to be discharged to the effective flow area of ​​the exhaust vent; the second pressure term is the square of the quotient obtained by dividing the volumetric flow rate of the heat to be discharged by the effective flow area of ​​the exhaust vent, multiplied by the air density of the exhaust airflow, and then multiplied by 1 / 2; the first pressure term and the second pressure term are added together to obtain the target static pressure.

[0013] A further technical solution includes a tensioning assembly comprising a bidirectional electric telescopic rod for tensioning, wherein the bidirectional electric telescopic rod is fixedly connected to the plane of the semi-cylindrical limiting block, and each telescopic part of the bidirectional electric telescopic rod is fixedly connected to an electric pressure plate. The plane of the semi-cylindrical limiting block is slidably connected to two clamping plates, and each clamping plate is connected to the semi-cylindrical limiting block by a spring, with each clamping plate facing an electric pressure plate.

[0014] In a further technical solution, the drive mechanism includes a motor, which is fixedly connected to the control cabinet via a fixed base, and the motor is connected to the semi-cylindrical limit block via a gear transmission pair.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. By arraying temperature and pressure sensors within the semi-cylindrical limiting block, and combining this with the spatial integration algorithm executed by the interface thermal conductivity determination module, the effective thermal conductivity of the interface between the sealing strip and the limiting block can be calculated in real time with high precision. This calculation comprehensively considers multiple physical field parameters such as local pressure, temperature, intrinsic thermal conductivity of the material, roughness gap, and Brinell hardness, breaking through the limitations of traditional fixed-value estimation. This enables the system to accurately sense the dynamic changes in thermal resistance at the contact interface, providing a reliable data foundation for the subsequent adaptive control of tension force and laser power.

[0017] 2. The tension force determination module decomposes the target dynamic tension force into a thermal strain compensation component and an interface thermal conductivity control component. The former, based on Hooke's Law and the theory of thermal expansion, compensates for dimensional changes in the edge banding strip caused by temperature variations in real time; the latter, based on the deviation between the actual interface thermal conductivity and the process target value, adjusts the contact pressure through a nonlinear exponential function to actively optimize the interface thermal conductivity. The combination of the two components prevents material wrinkling or excessive stretching and allows the interface thermal conductivity to quickly approach the target value, significantly improving the thermal-mechanical coupling stability.

[0018] 3. The laser power determination module, based on global energy conservation, incorporates the energy required for heating the edge banding strip, heat loss through interface conduction, and heat generated by mechanical friction into its calculations. This is then divided by the material's effective absorption rate of the laser, resulting in a real-time output of the target adjustable power. This module dynamically compensates for heat loss and counteracts frictional heat interference based on changes in interface thermal conductivity and fluctuations in tension force. This ensures that the laser output energy is always precisely matched to process requirements, effectively avoiding overheating or underheating, and significantly improving color reproduction accuracy and batch consistency.

[0019] 4. The heat dissipation control module calculates the required heat volume flow rate in real time based on the target regulating power and target dynamic tension force, combined with frictional heat generation and unabsorbed laser energy. Then, based on the principle of Darcy flow resistance and fluid dynamic pressure superposition, it accurately determines the target static pressure required by the exhaust fan. This control strategy fully considers the flow resistance characteristics of the activated carbon filter plate and the allowable temperature rise inside the equipment. It can dynamically match the heat generation intensity, promptly dissipate accumulated heat, effectively suppress the temperature rise of the limiting block substrate, avoid temperature reference drift during long-term operation, and ensure the long-term stability of the color matching effect and equipment safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram showing the connection between the drive mechanism and the semi-cylindrical limit block; Figure 3 This is a schematic diagram showing the connection between the semi-cylindrical limiting block and the tensioning assembly; Figure 4 This is a schematic diagram of the drive mechanism; Figure 5 This is a content framework diagram of the overall solution; Figure 6 Mechanical structure diagram of the core execution components of the equipment; Figure 7 Logic diagram for calculating the target dynamic tension force; In the attached diagram: 1. Outer shell; 2. Laser hot melt head; 3. Semi-cylindrical limit block; 4. Tensioning assembly; 41. Two-way electric telescopic rod; 42. Electric pressure plate; 43. Clamping plate; 44. Spring; 5. Drive mechanism; 51. Motor; 52. Gear transmission pair; 6. Control cabinet; 7. Cooling system; 8. Fixing base. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0023] like Figures 1-7 As shown, an edge banding color matching device based on laser hot melting is provided in one embodiment of the present invention, comprising: The laser hot melt head 2 is fixedly connected to the top of the outer shell 1, and the outer shell 1 is fixedly connected to the upper side of the control cabinet 6; The semi-cylindrical limiting block 3 is used to limit the edge sealing strip. Temperature sensors and pressure sensors are arrayed in the semi-cylindrical limiting block 3. The tensioning component 4 is disposed on one side of the plane of the semi-cylindrical limiting block 3, and is used to clamp the end of the edge banding strip and apply a dynamic tensioning force along the length direction of the edge banding strip; The drive mechanism 5 is fixedly connected to the control cabinet 6 and is used to drive the semi-cylindrical limit block 3 and the tensioning assembly 4 to reciprocate synchronously. The heat dissipation system 7 is fixedly connected to the outer casing 1 and is used to exhaust hot air from the equipment. Activated carbon filter plates are provided at the air inlet and air outlet of the heat dissipation system. The control system, housed in control cabinet 6, is communicatively connected to the temperature sensor, pressure sensor, tensioning assembly 4, laser hot melt head 2, and heat dissipation system 7. The control system includes: The interface thermal conductivity determination module is used to calculate the effective interface thermal conductivity between the sealing strip and the semi-cylindrical limiting block 3 based on the local temperature distribution data and local pressure distribution data of the interface collected by the temperature sensor and pressure sensor, combined with the inherent physical properties of the sealing strip. The tension force determination module is used to calculate the target dynamic tension force to compensate for thermal strain and reduce the deviation between the actual interface thermal conductivity and the target interface thermal conductivity based on the effective thermal conductivity of the interface and the preset process target interface thermal conductivity, and drive the tensioning component 4 to perform the operation. The laser power determination module is used to calculate and adaptively adjust the target control power of the laser hot melt head 2 based on the effective thermal conductivity of the interface and the target dynamic tension force, and on the basis of global energy conservation, to compensate for the loss of heat conducted through interface conduction and to offset the heat generated by mechanical friction. The heat dissipation control module is used to calculate and control the target static pressure required by the exhaust fan of the heat dissipation system 7 based on the target dynamic tension force and the target regulating power, and based on the principles of fluid mechanics and the upper limit of the allowable thermodynamic waste heat inside the equipment.

[0024] The laser hot-melt head 2 is a device capable of emitting a high-energy laser beam. Its function is to locally heat the surface of the edge banding strip, causing it to melt and thus achieving color matching. The outer casing 1 is the external structure of the equipment, used to house and protect the internal components, while also providing installation interfaces. The control cabinet 6 is the control center of the equipment, housing a control system for integrating and managing the various functions of the equipment. The semi-cylindrical limiting block 3 is a component with a semi-cylindrical working surface, used to physically position and support the edge banding strip during the laser hot-melt process, ensuring the stable operation of the edge banding strip within the processing area.

[0025] The temperature sensor is a device used to monitor local temperature in real time, and the data it collects is used to assess the heat exchange state between the edge sealing strip and the semi-cylindrical limiting block 3. The pressure sensor is a device used to monitor local pressure in real time, and the data it collects is used to assess the contact state between the edge sealing strip and the semi-cylindrical limiting block 3.

[0026] The tensioning assembly 4 is a mechanical device used to apply tension along the length of the edge banding strip to control its tension during processing. The drive mechanism 5 is a power transmission device used to generate mechanical motion, driving the semi-cylindrical limit block 3 and the tensioning assembly 4 to perform preset reciprocating rotations. The heat dissipation system 7 is a thermal management device used to dissipate heat generated inside the equipment, maintaining it within a safe operating temperature range. The activated carbon filter plate is a filter material with adsorption function, installed at the air inlet and outlet of the heat dissipation system 7 to filter harmful substances or odors from the air. The control system is the intelligent core of the equipment, composed of hardware and software, responsible for receiving sensor data, performing calculations, and sending control commands to the actuators.

[0027] In this embodiment, firstly, after the edge banding strip is fed into the device and clamped by the tensioning component 4, the drive mechanism 5 drives the semi-cylindrical limiting block 3 and the tensioning component 4 to rotate synchronously, so that the edge banding strip moves stably below the laser hot melt head 2. During this process, the temperature sensors and pressure sensors arrayed in the semi-cylindrical limiting block 3 continuously collect local temperature distribution data and local pressure distribution data at the contact interface between the edge banding strip and the limiting block. This real-time data is transmitted to the interface thermal conductivity determination module in the control system. This module, combined with the preset inherent physical properties of the edge banding strip, such as the thermal conductivity and Brinell hardness of the material, calculates the current effective interface thermal conductivity. For example, when the edge banding strip softens due to heat, the contact area increases, and the interface thermal conductivity may increase accordingly.

[0028] Next, the effective thermal conductivity of the interface calculated by the interface thermal conductivity determination module is transmitted to the tension force determination module. This module compares the real-time effective thermal conductivity of the interface with the target interface thermal conductivity preset by user A. If the actual interface thermal conductivity deviates from the target value, for example, due to poor contact caused by thermal expansion, the module calculates a target dynamic tension force. This tension force is used not only to compensate for the thermal strain of the edge banding strip caused by heating, such as preventing wrinkles or excessive stretching, but also to adjust the interface contact state, thereby reducing the deviation between the actual interface thermal conductivity and the target interface thermal conductivity. Subsequently, the tension force determination module drives the tensioning assembly 4 to execute the target dynamic tension force, for example, by adjusting the extension and retraction of the clamping mechanism to precisely control the tension. This solves the problem of unstable thermo-mechanical coupling caused by the thermal expansion of the edge banding strip.

[0029] Simultaneously, the laser power determination module receives data on the effective thermal conductivity of the interface and the target dynamic tension force. Based on the principle of global energy conservation, this module comprehensively considers the input energy of the laser hot-melt head 2, the heat absorbed by the edge sealing strip, the heat loss conducted from the interface to the semi-cylindrical limiting block 3, and the heat generated by mechanical friction between the edge sealing strip and the limiting block. Through precise calculations, this module adaptively adjusts the target control power of the laser hot-melt head 2. For example, when the interface thermal conductivity increases, leading to increased heat loss, the laser power will be correspondingly increased to ensure that the surface of the edge sealing strip can reach and maintain the optimal hot-melt temperature, thereby ensuring the stability and color reproducibility of the color matching effect.

[0030] In addition, the heat dissipation control module receives data on the target dynamic tension force and the target regulating power. This data reflects the total heat load inside the equipment, including heat generated by laser radiation, frictional heat, and conductive heat. Based on fluid mechanics principles and combined with the maximum permissible safe ambient temperature inside the equipment, this module calculates the target static pressure required by the exhaust fan of the heat dissipation system 7. For example, when the laser power and tension force increase, leading to a rise in heat load, the heat dissipation control module instructs the fan of the heat dissipation system 7 to increase its speed, thereby increasing the exhaust volume and ensuring that hot air inside the equipment is effectively discharged. This prevents the temperature of key components such as the semi-cylindrical limit block 3 from continuously rising, avoids reference temperature drift, and ensures color consistency during long-term operation. Activated carbon filter plates installed at the air inlet and outlet of the heat dissipation system 7 purify the air while exhausting hot air.

[0031] Through the aforementioned collaborative operation, the device can sense, dynamically adjust, and coordinately control laser heating, mechanical tensioning, and heat dissipation in real time, forming a closed-loop intelligent control system. This allows the color matching process of the edge banding strip to no longer be limited to open-loop control with constant parameters, but to adaptively optimize according to actual working conditions. This effectively solves the problems of dynamic changes in interface thermal conductivity, insufficient thermal strain compensation, and poor color matching consistency caused by heat accumulation in traditional equipment.

[0032] In a preferred embodiment of the present invention, the integral operation performed by the interface thermal conductivity determination module satisfies the following formula: in, For the effective thermal conductivity of the interface, This is the nominal contact area (macro coverage area, in m²) between the edge banding strip and the semi-cylindrical limiting block. The intrinsic thermal conductivity of the edge banding material is... For characteristic roughness gap, This represents the real-time local pressure value. The Brinell hardness of the edge banding material. This is the real-time local temperature value. For ambient reference temperature, , These are the coordinates of the contact surface. All temperature values ​​mentioned above are in Kelvin (K).

[0033] In this embodiment, the integral formula is the core of this application for accurately calculating the effective thermal conductivity of the interface. Among them, It represents the heat transfer capacity per unit area between the edge banding strip and the semi-cylindrical limiting block 3, and is a key parameter for evaluating the thermal contact state of the interface. This refers to the contact area where heat exchange actually occurs between the edge banding strip and the semi-cylindrical limiting block 3, and its size is affected by pressure and surface morphology. It is the inherent thermal conductivity of the edge banding material, reflecting the material's ability to conduct heat. It describes the degree of microscopic unevenness at the contact interface, that is, the tiny gaps caused by surface roughness, which can hinder heat transfer. and These are the real-time local pressure and temperature at any point on the contact surface, which are acquired in real time by pressure sensors and temperature sensors distributed in an array in the semi-cylindrical limiting block 3. It refers to the Brinell hardness of the edge banding material, which affects the material's deformation behavior under pressure, and thus affects the actual contact area. This is a reference temperature used to normalize the local temperature. By comprehensively considering these physical parameters, the integral formula can accurately quantify the interfacial thermal resistance, thus obtaining the precise effective interfacial thermal conductivity. This integral operation can be implemented numerically, for example, by discretizing the nominal contact area into multiple small cells, calculating the function value for each cell, and then summing the results; alternatively, under specific conditions, it can be quickly estimated using a pre-established lookup table or approximate model, but its foundation still lies in this physical model.

[0034] It should be clarified that the integration domain in the above integration operations... This specifically refers to the macroscopic nominal contact area between the edge banding strip and the semi-cylindrical limiting block, not the microscopic actual contact area. Temperature and pressure sensors are arrayed on this macroscopic area, and the measured local values... and This represents the average state within each macroscopic infinitesimal element. The exponential term in the integrand. This describes the actual heat transfer efficiency within the macroscopic element due to microscopic roughness in the contact. Therefore, the integral result is divided by the macroscopic nominal area. After that, what was obtained It can be directly applied to macroscopic heat flow equations (i.e. The equivalent interfacial thermal conductivity ensures strict physical and mathematical consistency in the calculation of interfacial heat conduction.

[0035] The temperature and pressure sensors are arranged at equal intervals along the circumferential and axial directions on the contact arc surface of the semi-cylindrical limiting block, forming an m×n two-dimensional grid array. 12–16 sensors are arranged in the circumferential direction (i.e., the rotation direction of the limiting block), and 6–10 sensors are arranged in the axial direction (i.e., the width direction of the sealing strip). The interval between adjacent sensors does not exceed 5 mm. The spatial coordinates of each sensor are pre-stored in the control system for spatial interpolation and reconstruction of the temperature and pressure fields of the contact surface, thereby enabling area integral calculation.

[0036] As a crucial component of the control system, the interface thermal conductivity determination module, by executing the aforementioned integral formula, can accurately and in real-time quantify the effective thermal conductivity of the interface between the sealing strip and the semi-cylindrical limiting block 3. This formula incorporates real-time local temperature distribution data collected by temperature and pressure sensors within the semi-cylindrical limiting block 3. and local pressure distribution data As input, and combined with the intrinsic thermal conductivity of the edge banding material Characteristic roughness gap Brinell hardness and ambient reference temperature These parameters possess inherent physical properties. By spatially integrating these parameters, the module can accurately reflect the influence of the interface micro-contact state on heat transfer efficiency, such as the pressure term. This describes the physical process by which increasing local pressure leads to an increase in the number of microscopic contact points, a decrease in thermal resistance, and consequently, an increase in thermal conductivity. (Temperature term) This approach considers the variation of material thermal properties with temperature. This comprehensive, physics-driven calculation method, based on multiple physics parameters, significantly improves the accuracy and dynamic response capability of assessing effective interfacial thermal conductivity. Accurate effective interfacial thermal conductivity... This information is then passed to the tension determination module and the laser power determination module, serving as crucial data for their precise control decisions. For example, the laser power determination module can determine the tension force based on precise... This value more accurately compensates for heat loss through interfacial conduction, ensuring that the energy output by the laser heat-fusion head 2 can be precisely applied to the sealing strip, thereby avoiding overheating or underheating caused by inaccurate assessment of interfacial heat conduction. It effectively solves the problem of inaccurate heat control caused by inaccurate estimation of interfacial thermal resistance in traditional methods.

[0037] The following is a specific example illustrating this: the interface thermal conductivity determination module can employ an embedded high-performance processor, such as an ARM-based microcontroller or digital signal processor, to perform the integration calculation. This processor receives data from temperature and pressure sensors arranged in an array inside the semi-cylindrical limiting block 3 via a high-speed data bus. For example, the sensor array can acquire local temperature and pressure data hundreds of times per second and digitize it. The processor then calculates the nominal contact area... The system is divided into a fine grid, such as 10x10 or 20x20 cells. For each grid cell, the processor uses sensor data for interpolation or directly uses the nearest sensor reading to obtain the local temperature. and local pressure Meanwhile, the intrinsic thermal conductivity of the edge banding material... Characteristic roughness gap Brinell hardness and ambient reference temperature These parameters can be pre-stored in the processor's non-volatile memory. The processor then applies the integrand from the integral formula to each grid cell and uses numerical integration methods (such as the Riemann summation or trapezoidal rule) to sum the calculation results for all cells, thereby obtaining the effective thermal conductivity of the interface in real time. This implementation method ensures that the calculation of interfacial thermal conductivity is both fast and accurate, providing a solid data foundation for the precise control of the entire color matching equipment.

[0038] The The average gap height between the surface of the edge banding strip and the surface of the semi-cylindrical limiting block is obtained by offline measurement of the static contact interface using a white light interferometer or a laser confocal microscope. In engineering, it can also be approximated as 0.5 times the sum of the root mean square value of the surface roughness of the edge banding strip and the root mean square value of the surface roughness of the semi-cylindrical limiting block. The specific value is calibrated and corrected during the equipment commissioning stage by comparing the measured temperature of the thermocouple with the predicted temperature of the model.

[0039] In a preferred embodiment of the present invention, the target dynamic tension force calculated by the tension force determination module consists of a first force component and a second force component; the first force component is determined based on the elastic modulus, cross-sectional area, total elongation, initial length, linear thermal expansion coefficient, and temperature change of the edge sealing strip material, according to Hooke's law and the theory of thermal expansion; the second force component is determined based on the radius, working width, Brinell hardness of the edge sealing strip material, and the difference between the preset process target interface thermal conductivity and the effective interface thermal conductivity.

[0040] In this embodiment, the solution of this application calculates the target dynamic tension force by comprehensively considering the thermomechanical behavior and interfacial thermal conductivity of the edge banding strip during the hot-melt process.

[0041] Specifically, this module decomposes the target dynamic tension force into two key components. The first force component focuses on compensating for the strain of the edge banding strip caused by temperature changes and mechanical stretching. Utilizing the inherent physical properties of the edge banding strip material, such as its elastic modulus and linear thermal expansion coefficient, combined with real-time monitoring of cross-sectional area, total elongation of the edge banding strip, initial length, and temperature change data, it accurately calculates the force required to maintain the edge banding strip under stable stress based on Hooke's Law and the theory of thermal expansion. This effectively counteracts the dimensional changes caused by thermal stress and the deformation caused by mechanical stretching, ensuring that the edge banding strip maintains the expected geometric and mechanical state during processing.

[0042] Building upon this, the second force component focuses on optimizing the interfacial thermal conductivity between the edge banding strip and the semi-cylindrical limiting block 3. This component utilizes the geometric parameters of the semi-cylindrical limiting block 3 and the Brinell hardness of the edge banding strip material, with the deviation between the preset process target interfacial thermal conductivity and the effective interfacial thermal conductivity as the core input. By dynamically adjusting the second force component, the tension force determination module can actively adjust the contact pressure and actual contact area between the edge banding strip and the limiting block 3, thereby reducing the deviation between the actual interfacial thermal conductivity and the target value.

[0043] This dual-component synergistic tensioning force determination mechanism enables the tensioning component 4 to apply a dynamic tensioning force that can both compensate for thermal strain and precisely control the interfacial thermal conductivity. In this way, the equipment can not only maintain the mechanical stability of the edge sealing strip, but also ensure that heat is efficiently and stably transferred from the laser hot melt head 2 to the edge sealing strip, thereby achieving a more uniform and controllable hot melt effect.

[0044] In a preferred embodiment of the present invention, the target dynamic tension force satisfies the following formula: in, The target dynamic tension force, The elastic modulus of the edge banding material. This refers to the cross-sectional area of ​​the edge banding strip. The total elongation of the sealing strip within the limiting range is measured in real time by a high-precision displacement sensor; after subtracting the free thermal expansion strain, the remaining part is the pure mechanical strain, which is multiplied by the elastic modulus to obtain the true thermal stress; This is the initial length of the edge banding strip within the limiting range. The coefficient of linear thermal expansion of the edge banding material. The global average temperature of the surface of the semi-cylindrical limiting block 3. The initial temperature at which the edge banding strip enters. The radius of the semi-cylindrical limiting block 3 is... The working width of the semi-cylindrical limiting block 3. The Brinell hardness of the edge banding material. The preset process target interface thermal conductivity, The effective thermal conductivity of the interface is given.

[0045] In this embodiment, the target dynamic tension force $F_T$ in the above formula is the precise force value that the tensioning component (4) needs to apply, aiming to maintain the stability of the edge banding strip during the hot-melt process and optimize the heat transfer efficiency. Its function is to comprehensively balance the needs of thermal strain compensation and interface thermal conductivity control. The first part of the formula, It precisely quantifies the strain caused by the mechanical elongation and thermal expansion of the edge banding strip and converts it into the required compensating force.

[0046] in, The ability of a material to resist elastic deformation can be measured by data provided by the material supplier, standard mechanical tests, or non-contact methods such as acoustic measurements. It is the cross-sectional area of ​​the edge banding strip perpendicular to its length direction, which can be calculated through geometric measurement or computer vision system; It is the length change of the sealing strip due to force within the limit range. It can be indirectly obtained by real-time monitoring of the displacement of the tensioning component (4) by a high-precision displacement sensor (such as a laser displacement sensor or encoder), or by analyzing the deformation of the sealing strip through a vision system. It is the length of the limiting area of ​​the edge banding strip when it is not under stress and at its initial temperature, which can be preset during equipment design or measured by a sensor; The proportion of a material’s length change with temperature is measured, and is usually provided by the material manufacturer or determined by a thermomechanical analyzer. The average temperature of the contact area between the semi-cylindrical limiting block (3) and the sealing strip can be obtained by weighted averaging or regional integration of the local temperature data collected by the array of temperature sensors. It is the ambient temperature or its own temperature before the edge banding strip enters the hot-melt zone, which can be measured by an infrared temperature sensor or a contact temperature sensor installed at the entrance of the edge banding strip.

[0047] The second part of the formula, This represents the additional force required to adjust the interface thermal conductivity to the target value. It is the radius of curvature of the semi-cylindrical limit block (3), which is a device design parameter; It is the effective width of the contact between the semi-cylindrical limiting block (3) and the sealing strip, and it is also a design parameter of the equipment; The ability of a material to resist localized plastic deformation is usually measured by the material supplier or by testing with a Brinell hardness tester; It is the ideal interface thermal conductivity that is pre-set according to the specific edge sealing process requirements, and can be determined through experimental optimization, empirical data or simulation models; It is the actual effective thermal conductivity between the edge banding strip and the semi-cylindrical limiting block (3), which is calculated by the interface thermal conductivity determination module based on sensor data.

[0048] This formula integrates the elastic deformation, thermal expansion effect, and interfacial thermal conductivity control requirements of the edge banding strip into a unified framework. Specifically, the first part of the formula precisely quantifies the strain caused by the mechanical elongation and thermal expansion of the edge banding strip and converts it into the required compensating force. By taking these factors into account, it ensures that the tension force can effectively counteract the deformation trend of the edge banding strip under heated and stressed conditions, thereby maintaining its stable position on the semi-cylindrical limiting block (3). The second part of the formula cleverly introduces a feedback adjustment mechanism for the interfacial thermal conductivity. This part calculates the additional tension force by combining the geometric parameters of the semi-cylindrical limiting block (3) and the hardness of the edge banding strip material with the deviation between the actual effective interfacial thermal conductivity and the preset process target interfacial thermal conductivity. Below When this occurs, a positive tension force will be generated, causing a tighter contact between the sealing strip and the semi-cylindrical limiting block (3), thereby improving the interfacial thermal conductivity; conversely, when Close to or higher When the tension force decreases, its contribution diminishes, preventing over-tensioning. This non-linear exponential function makes the tension force more sensitive and precise in responding to thermal conductivity deviations, especially allowing for fine adjustments when approaching the target value.

[0049] Using the above formula, the tension force determination module can calculate the precise target dynamic tension force in real time and dynamically. This force can not only effectively compensate for the thermal strain of the sealing strip during the hot-melting process, preventing it from deforming or falling out of the limit due to thermal expansion and contraction, but also adaptively adjust according to the difference between the actual thermal conductivity of the interface and the target thermal conductivity. This comprehensive mechanical model enables the tensioning component (4) to apply a dynamic force that can both maintain the stability of the sealing strip and optimize the heat transfer efficiency, thereby providing stable thermodynamic boundary conditions for the precise power control of the subsequent laser hot-melt head (2).

[0050] In a preferred embodiment of the present invention, the laser power determination module calculates the target control power in accordance with the following formula: in, To control the target power, To determine the effective absorption rate of the edge banding strip to the laser, The density of the edge banding material, This refers to the cross-sectional area of ​​the edge banding strip. The real-time angular velocity of the reciprocating rotation of the semi-cylindrical limit block 3. The radius of the semi-cylindrical limiting block 3 is... The specific heat capacity of the edge banding material, To achieve the optimal hot-melt temperature required for the edge banding process, The global average temperature of the surface of the semi-cylindrical limiting block 3. The effective thermal conductivity of the interface is... This is the nominal contact area between the semi-cylindrical limiting block 3 and the edge banding strip. The temperature of the solid base inside the semi-cylindrical limiting block 3. The coefficient of kinetic friction between the edge banding strip and the surface of the semi-cylindrical limiting block 3. The target dynamic tension force. The target adjustable power. Take max(0, calculated value), that is, when the energy balance calculation result is negative, the laser thermal fusion head does not output power.

[0051] λ is the amplification factor of the normal force generated by the contact angle between the edge banding strip and the semi-cylindrical limiting block 3. , The contact angle (in radians) is the central angle of the semi-cylindrical limiting block actually covered by the edge banding strip. When the semi-cylindrical limiting block is a standard semicircle, θ=π, λ=2; as the contact angle increases, λ decreases accordingly. This coefficient is obtained by measuring the geometric angle of the limiting block or calculating the rotation range read by the encoder.

[0052] In this embodiment, the target control power This refers to the laser energy that the laser hot-melt head 2 needs to output to ensure that the edge banding strip reaches the expected hot-melt state during processing. The effective absorption rate of the edge banding strip to the laser. This indicates the efficiency of the edge banding material in absorbing laser energy. Its value depends on factors such as the material composition, color, and wavelength of the laser. It can be estimated through experimental measurement or based on the material's optical properties. The density of the edge banding material... and the cross-sectional area of ​​the edge banding strip These are the basic physical dimensions and mass characteristics of the edge banding strip, which together determine the mass of the edge banding strip per unit length. The real-time angular velocity of the reciprocating rotation of the semi-cylindrical limit block 3. The radius R of the semi-cylindrical limiting block 3 together determines the linear velocity of the edge banding strip in the processing area, which in turn affects the amount of edge banding strip material passing through per unit time.

[0053] Specific heat capacity of edge banding material It is a physical quantity that measures the heat absorption capacity of a material, representing the amount of heat required to raise the temperature of a unit mass of material by one degree Celsius. The optimal hot-melt temperature required for edge banding processing. The ideal processing temperature is preset based on the material properties and bonding requirements of the edge banding strip. The global average temperature of the surface of the semi-cylindrical limiting block 3. This reflects the overall thermal state of the contact area between the edge banding strip and the limiting block, and can be calculated by averaging multiple temperature sensors. Effective thermal conductivity of the interface. This is a comprehensive indicator of the heat transfer efficiency between the edge banding strip and the semi-cylindrical limiting block 3, and its value is affected by various factors such as contact pressure and surface roughness. The nominal contact area between the semi-cylindrical limiting block 3 and the edge banding strip... This refers to the actual size of the area where heat exchange occurs. The temperature of the solid substrate inside the semi-cylindrical limiting block 3. This represents the temperature of the limiting block as a heat sink, and is one of the driving forces for heat conduction from the edge banding strip to the limiting block. The coefficient of kinetic friction between the edge banding strip and the surface of the semi-cylindrical limiting block 3. This characterizes the frictional resistance between the contact surfaces of the two objects; friction generates heat. Target dynamic tension force. It is the force applied to the edge banding strip by the tensioning component 4. It not only affects the contact pressure, but also directly participates in the calculation of frictional heat generation.

[0054] The solution in this application achieves precise calculation and adaptive adjustment of the target control power of the laser hot melt head 2 through the above formula. This formula is based on the principle of global energy conservation, comprehensively considering four key energy terms: laser energy input, energy required for heating the sealing strip material, heat loss through interface conduction, and heat generated by mechanical friction. Specifically, the first term in the formula... This represents the temperature of the edge banding material passing through the processing area per unit time, from the current average temperature $T_{avg}$ to the optimal heat melt temperature. The required energy. Second item. This quantifies the heat conduction loss between the edge banding strip and the semi-cylindrical limiting block 3 due to the temperature difference; this portion of heat requires additional laser compensation. (Third item) This represents the heat generated by mechanical friction. This heat can help raise the temperature of the edge banding strip, so it should be deducted when calculating the required laser power.

[0055] Finally, the sum of all these energy terms is divided by the effective absorption rate of the laser by the edge banding strip. This allows us to obtain the target adjustable power that the laser hot melt head 2 actually needs to output. In this way, the system can dynamically balance various thermodynamic and mechanical factors in real time, ensuring that the edge banding strip is always in the optimal heat-melting state, thereby achieving precise temperature control in complex processing environments.

[0056] The inclusion of all frictional heat generation as a heat source in the edge banding energy balance is based on the simplified engineering assumption that frictional heat is generated within the extremely thin surface layer of the contact interface, and that the thermal conductivity of the edge banding polymer material is much lower than that of the metal limiting block, and the thermal action time is extremely short, so the heat preferentially accumulates on the surface of the edge banding and is absorbed by it; the systematic deviation caused by this assumption can be compensated in real time through the laser power closed-loop adjustment function.

[0057] In a preferred embodiment of the present invention, the heat dissipation control module calculates the target static pressure by at least a first pressure term based on Darcy flow resistance, the first pressure term being determined based on the dynamic viscosity of the exhaust airflow, the thickness of the activated carbon filter plate and the permeability of the porous medium, and the volumetric flow rate of the heat to be dissipated, and a second pressure term based on fluid dynamic pressure, wherein the target static pressure satisfies: in For the target static pressure, The dynamic viscosity of the exhaust airflow. The physical thickness of the activated carbon filter plate. The permeability of the porous media in the activated carbon filter plate. To determine the effective absorption rate of the edge banding strip to the laser, To control the target power, The coefficient of kinetic friction between the edge banding strip and the surface of the semi-cylindrical limiting block 3. The target dynamic tension force, The real-time angular velocity of the reciprocating rotation of the semi-cylindrical limit block 3. The radius of the semi-cylindrical limiting block 3 is... The air density of the exhaust airflow. The specific heat capacity of air at constant pressure. The effective flow area of ​​the 7 exhaust vents of the heat dissipation system is the windward area of ​​the activated carbon filter plate. This refers to the highest permissible safe ambient temperature inside the equipment. The initial temperature of the external environment at the air inlet. The volumetric flow rate of the heat to be removed is expressed in m³. 3 / s.

[0058] The The initial values ​​are obtained through flow resistance testing and calibration of the activated carbon filter plates before shipment; during operation, the control system monitors the actual drive current or torque of the exhaust fan in real time, and adjusts it according to the current... The calculated target static pressure is compared with the theoretical power consumption of the fan. If the measured power consumption is consistently higher than the theoretical value, the filter plate is determined to be clogged, and the pressure is gradually reduced according to a preset step size. The equivalent value is calculated until the deviation between the two returns to the allowable range. Meanwhile, when... When the filter drops to below 60% of its initial value, the system issues a warning to replace the filter.

[0059] In this embodiment, the first pressure term based on Darcy flow resistance is used to quantify the pressure required for the exhaust airflow to overcome the resistance of the activated carbon filter plate, ensuring sufficient airflow through the filter plate. This first pressure term can be determined based on preset parameters such as dynamic viscosity, activated carbon filter plate thickness, and porous media permeability, combined with the real-time calculated volumetric flow rate of the heat to be discharged. Alternatively, it can be achieved by testing the flow resistance characteristics of activated carbon filter plates of different specifications and lifespans, establishing a database for the heat dissipation control module to query. The second pressure term based on fluid dynamic pressure is used to quantify the pressure loss caused by velocity changes in the exhaust airflow at the exhaust port, ensuring smooth exhaust airflow. This second pressure term can be determined by installing a wind speed sensor at the exhaust port to measure the exhaust velocity in real time and then calculating the dynamic pressure; alternatively, the average exhaust velocity can be estimated based on the exhaust port's geometry and volumetric flow rate, thereby calculating the dynamic pressure. (Volumetric flow rate of the heat to be discharged) The calculation formula takes into account the energy of the laser that is not absorbed by the edge banding strip, the heat generated by mechanical friction, and the allowable temperature rise inside the equipment, thus accurately quantifying the heat dissipation requirements.

[0060] The solution in this application precisely manages the operation of the heat dissipation system 7 through a heat dissipation control module in the control system, thereby maintaining the internal temperature of the equipment within a safe and optimal range. The heat dissipation control module receives the target dynamic tension force from the tension force determination module. and target control power from the laser power determination module These two parameters are crucial because they directly determine the heat generated inside the device: Represents laser energy input, while (Combining the coefficient of friction and angular velocity) represents the heat generated by mechanical friction.

[0061] Based on these inputs, the heat dissipation control module first utilizes The formula calculates the total heat that needs to be removed from the system and converts it into the required air volume flow rate. This calculation takes into account the energy of the laser that is not absorbed by the sealing strip and the heat generated by mechanical friction, as well as the density, specific heat capacity, and allowable temperature rise of air. Once Once confirmed, the module will calculate the target static pressure that the exhaust fan of the cooling system 7 must provide. This calculation is crucial because the cooling system 7 contains an activated carbon filter plate, which introduces significant flow resistance. The formula explicitly includes two main pressure components: the Darcy resistance term required to overcome the resistance of the activated carbon filter, and the hydrodynamic pressure term required to overcome the air acceleration at the exhaust vent. By adding these two pressure terms, the cooling control module can accurately determine the total static pressure required by the fan. Subsequently, the The value is used to control the exhaust fan of the cooling system 7, ensuring that the fan operates at a precise power level to expel the calculated volume of hot air, thereby maintaining the internal temperature within the desired range. This dynamic and precise control effectively prevents equipment overheating, ensures process stability, and extends the equipment's lifespan.

[0062] In one specific implementation, the heat dissipation control module can be implemented by a dedicated microcontroller unit (MCU) in control cabinet 6. This MCU continuously monitors the target controlled power output by the laser power determination module. and the target dynamic tension force output by the tension force determination module For example, when the target modulates power... Increase, or target dynamic tension As the size increases, the heat generated inside the system will also increase. The MCU will monitor these parameters in real time, along with the preset effective absorption rate of the laser by the sealing strip. The coefficient of dynamic friction between the edge banding strip and the surface of the semi-cylindrical limiting block 3 Real-time angular velocity of the reciprocating rotation of the semi-cylindrical limit block 3 The radius R of the semi-cylindrical limiting block 3, and the air density of the exhaust airflow. Specific heat capacity of air at constant pressure Maximum permissible safe ambient temperature inside the equipment and the initial temperature of the external environment at the air inlet Substitution The formula is used to calculate the volumetric heat flow rate that needs to be discharged under the current operating conditions. Then, the MCU will calculate... Value, and the dynamic viscosity of the exhaust airflow. Physical thickness of activated carbon filter plate The permeability of porous media in activated carbon filter plates The effective airflow area of ​​the 7 exhaust vents of the heat dissipation system Substitute parameters The formula is used to calculate the target static pressure required by the fan. The MCU outputs corresponding control signals through a digital-to-analog converter (DAC) to drive the exhaust fan in the cooling system 7, adjusting its speed and power to a level that can provide the target static pressure, thereby precisely controlling the exhaust volume and ensuring stable internal temperature of the equipment.

[0063] In a preferred embodiment of the present invention, the tensioning assembly 4 includes a bidirectional electric telescopic rod 41 for tensioning. The bidirectional electric telescopic rod 41 is fixedly connected to the plane of the semi-cylindrical limiting block 3. The telescopic part of the bidirectional electric telescopic rod 41 is fixedly connected to an electric pressure plate 42. The plane of the semi-cylindrical limiting block 3 is slidably connected to two clamping plates 43. A spring 44 is connected between the clamping plates 43 and the semi-cylindrical limiting block 3. Each clamping plate 43 is directly opposite an electric pressure plate 42.

[0064] In this embodiment, the solution of this application achieves precise dynamic tensioning of the edge banding strip through the coordinated action of the bidirectional electric telescopic rod 41, electric pressure plate 42, clamping plate 43, and spring 44 inside the tensioning assembly 4. Specifically, after the control system calculates the target dynamic tensioning force based on the effective thermal conductivity of the interface and the preset process target interface thermal conductivity, it drives the bidirectional electric telescopic rod 41 to extend and retract. The extension and retraction of the bidirectional electric telescopic rod 41 drives the electric pressure plate 42, which in turn acts on the clamping plate 43. The clamping plate 43 slides on the plane of the semi-cylindrical limiting block 3 and, together with the spring 44 connected between the semi-cylindrical limiting block 3, applies a clamping force to the edge banding strip. The presence of the spring 44 not only provides the initial preload, ensuring that the edge banding strip can be stably clamped even when not actively tensioned, but also provides a certain degree of buffering and flexibility during dynamic tensioning, allowing the tensioning force to be transmitted to the edge banding strip more smoothly and avoiding instantaneous impact.

[0065] By precisely controlling the extension and speed of the bidirectional electric telescopic rod 41, the tension force applied to the edge sealing strip can be adjusted in real time and dynamically. This combination of a precise mechanical structure and control system enables the tensioning component 4 to accurately compensate for the thermal strain of the edge sealing strip during the hot-melt process according to process requirements, and effectively reduce the deviation between the actual interface thermal conductivity and the target interface thermal conductivity, thereby ensuring the stability and consistency of the laser hot-melt color matching process.

[0066] The drive mechanism 5 includes a motor 51, which is fixedly connected to the control cabinet 6 via a fixed base 8. The motor 51 is also connected to the semi-cylindrical limit block 3 via a gear transmission pair 52.

[0067] In this embodiment, the present application constructs a drive mechanism 5 by organically combining a motor 51, a fixed base 8, and a gear transmission pair 52 to achieve synchronous reciprocating rotation of the semi-cylindrical limiting block 3 and the tensioning assembly 4. Specifically, the motor 51 serves as the power source, and its rotational motion is the starting point of the entire drive process. The motor 51 is securely mounted on the control cabinet 6 via the fixed base 8. This mounting method ensures the stability and precise alignment of the motor 51 during operation, avoiding transmission instability caused by vibration or installation deviation. The output shaft of the motor 51 is connected to the axis of the semi-cylindrical limiting block 3 via the gear transmission pair 52. The gear transmission pair 52 can convert the rotational motion of the motor 51 into a specific reciprocating rotation mode required by the semi-cylindrical limiting block 3 according to process requirements, including precise rotation angle, speed, and frequency. This transmission method can not only effectively transmit torque but also increase or decrease speed and amplify torque by adjusting the gear ratio, thereby ensuring that the semi-cylindrical limiting block 3 can stably and accurately limit and heat the edge banding strip during reciprocating rotation.

[0068] Through this structured driving method, the equipment can precisely control the position and movement of the edge sealing strip during the laser hot melting process, providing a stable mechanical foundation for subsequent determination of interface thermal conductivity, tension control and laser power adjustment, thereby effectively solving the problems of stable installation, efficient transmission and effective integration with control cabinet 6 of the drive mechanism.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A color matching device for edge sealing strips based on laser hot melting, characterized in that, include: The laser hot melt head (2) is fixedly connected to the top of the outer shell (1), which is fixedly connected to the upper side of the control cabinet (6); A semi-cylindrical limiting block (3) is used to limit the edge sealing strip. Temperature sensors and pressure sensors are arrayed in the semi-cylindrical limiting block (3). The tensioning component (4) is disposed on one side of the plane of the semi-cylindrical limiting block (3) and is used to clamp the end of the sealing strip and apply a dynamic tensioning force along the length of the sealing strip; The drive mechanism (5) is fixedly connected to the control cabinet (6) and is used to drive the semi-cylindrical limit block (3) and the tensioning assembly (4) to rotate synchronously. The heat dissipation system (7) is fixedly connected to the outer shell (1) and is used to exhaust hot air in the equipment to the outside. The air inlet and outlet of the heat dissipation system are provided with activated carbon filter plates. The control system is located in the control cabinet (6) and is communicatively connected to the temperature sensor, pressure sensor, tensioning assembly (4), laser hot melt head (2), and heat dissipation system (7). The control system includes: The interface thermal conductivity determination module is used to calculate the effective interface thermal conductivity between the sealing strip and the semi-cylindrical limiting block (3) based on the local temperature distribution data and local pressure distribution data of the interface collected by the temperature sensor and pressure sensor, combined with the inherent physical properties of the sealing strip. The tension force determination module is used to calculate the target dynamic tension force to compensate for thermal strain and reduce the deviation between the actual interface thermal conductivity and the target interface thermal conductivity based on the effective thermal conductivity of the interface and the preset process target interface thermal conductivity, and drive the tension component (4) to perform the operation. The laser power determination module is used to calculate and adaptively adjust the target control power of the laser hot melt head (2) based on the effective thermal conductivity of the interface and the target dynamic tension force, and on the basis of global energy conservation, to compensate for the loss of heat conducted through interface conduction and to offset the heat generated by mechanical friction. The heat dissipation control module is used to calculate and control the target static pressure required by the exhaust fan of the heat dissipation system (7) based on the target dynamic tension force and the target regulating power, and based on the principles of fluid mechanics and the upper limit of the allowable thermodynamic residual heat inside the equipment.

2. The device according to claim 1, characterized in that, The calculation method performed by the interface thermal conductivity determination module is as follows: The nominal contact area between the edge banding strip and the semi-cylindrical limiting block is integraled by the area integral. The integrand is the ratio of the intrinsic thermal conductivity of the edge banding material to the characteristic roughness gap. The quotient is then multiplied by the difference between 1 and the exponential function with the natural constant e as the base. The product is then multiplied by the ratio of the local temperature value to the ambient reference temperature. Finally, the area integral result is divided by the nominal contact area to obtain the effective thermal conductivity of the interface. The exponent of this exponential function is the local pressure value divided by the negative value of the Brinell hardness of the edge banding material.

3. The device according to claim 2, characterized in that, The target dynamic tension force calculated by the tension force determination module consists of a first force component and a second force component; First, calculate the first force component by multiplying the elastic modulus of the edge banding material by the cross-sectional area of ​​the edge banding and then by a difference. The difference is: the ratio of the total elongation of the edge banding to the initial length, minus the product of the linear thermal expansion coefficient and the difference between the global average temperature and the initial entry temperature. The second force component is the radius of the semi-cylindrical limiting block multiplied by the working width and then by the Brinell hardness of the sealing strip material. The result is then multiplied by 1 minus the difference of an exponential function with the natural constant e as the base. The exponent of this exponential function is the difference between the process target interface thermal conductivity and the effective interface thermal conductivity, divided by the process target interface thermal conductivity. The quotient is negative. The first force component and the second force component are added together to obtain the target dynamic tension force.

4. The device according to claim 3, characterized in that, The laser power determination module calculates the target control power in the following way: First, multiply the reciprocal of the effective absorption rate of the edge banding strip to the laser by the combination of the three terms in square brackets. The first term in square brackets is the difference between the optimal hot-melt temperature required by the process and the global average temperature, multiplied by the density of the edge banding strip material, multiplied by the cross-sectional area, multiplied by the real-time angular velocity of the reciprocating rotation of the semi-cylindrical limiting block, multiplied by the radius, and multiplied by the specific heat capacity. The result represents the energy required to heat the edge banding strip to the hot-melt temperature. The second term is the difference between the global average temperature and the temperature of the solid substrate inside the semi-cylindrical limiting block, multiplied by the effective thermal conductivity of the interface and the nominal contact area. The result represents the heat lost through the contact surface to the limiting block. The third term is the amplification factor of the normal force generated by the contact angle between the edge banding strip and the semi-cylindrical limiting block, multiplied by the dynamic friction coefficient between the surface of the edge banding strip and the semi-cylindrical limiting block, multiplied by the target dynamic tension force, multiplied by the real-time angular velocity, and multiplied by the radius. This term represents the frictional heat generation term. The negative sign is taken before this term to cancel the mechanical frictional heat generation. Add the first term to the second term and subtract the third term, then multiply the result by the reciprocal of the effective absorption rate to obtain the target regulation power.

5. The device according to claim 4, characterized in that, When calculating the target static pressure, the heat dissipation control module first calculates the volumetric flow rate of heat to be dissipated, in the following manner: First, subtract the effective absorption rate of the laser by the sealing strip from 1, multiply the difference by the target control power, add the normal force amplification factor, multiply the dynamic friction coefficient between the sealing strip and the semi-cylindrical limiting block surface, multiply the target dynamic tension force, multiply the real-time angular velocity, and multiply the radius to obtain the total heat generation power. Then divide the total heat production power by the following product: the difference between the maximum allowable safe ambient temperature inside the equipment and the initial ambient temperature outside the air inlet, multiplied by the air density of the exhaust airflow, multiplied by the specific heat capacity of the air at constant pressure, and the resulting quotient is the volumetric flow rate of the heat to be discharged.

6. The device according to claim 5, characterized in that, The heat dissipation control module calculates the target static pressure in the following way: The first pressure term is the ratio obtained by multiplying the dynamic viscosity of the exhaust airflow by the physical thickness of the activated carbon filter plate and dividing it by the permeability of the porous media of the activated carbon filter plate, and then multiplying it by the volumetric flow rate of the heat to be discharged and dividing it by the effective flow area of ​​the exhaust vent. The second pressure term is the square of the quotient obtained by dividing the volumetric flow rate of the heat to be discharged by the effective flow area of ​​the exhaust vent, multiplied by the air density of the exhaust airflow, and then multiplied by 1 / 2. Add the first pressure term to the second pressure term to obtain the target static pressure.

7. The device according to claim 1, characterized in that, The tensioning assembly (4) includes a bidirectional electric telescopic rod (41) for tensioning. The telescopic parts of the bidirectional electric telescopic rod (41) are fixedly connected to electric pressure plates (42). The semi-cylindrical limiting block (3) is slidably connected to two clamping plates (43).

8. The device according to claim 7, characterized in that, The bidirectional electric telescopic rod (41) is fixedly connected to the plane of the semi-cylindrical limiting block (3), and each clamping plate (43) is directly opposite an electric pressure plate (42).

9. The device according to claim 7, characterized in that, Springs (44) are connected between the clamping plate (43) and the semi-cylindrical limiting block (3).

10. The device according to claim 1, characterized in that, The drive mechanism (5) includes a motor (51), which is fixedly connected to the control cabinet (6) via a fixed base (8) and is connected to the semi-cylindrical limit block (3) via a gear transmission pair (52).

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