A pur hot melt adhesive process for edge sealing

Abstract

This invention discloses a PUR adhesive mixing process for edge banding, comprising: edge banding adhesive preparation, intelligent PUR adhesive dispensing machine system setting, high-precision color recognition sensor calibration, system setting confirmation, multi-system collaborative action construction, implementation of adhesive mixing ratio control, and adhesive application and edge banding detection. This invention integrates an edge banding machine adhesive application unit, a color recognition module, and an intelligent PUR adhesive dispensing machine system to jointly achieve the PUR adhesive mixing processing effect. It solves the problem of traditional single-color adhesive dispensing machines only supporting single adhesive output, and particularly addresses the issue of controlling the color difference between the adhesive line and the color of the edge banding board, meeting the processing requirements of gray and khaki colors, overcoming the problem of color difference control in edge banding of different colored boards, and creatively utilizing color mixing and adhesive mixing technology, greatly enriching the selectivity of edge banding processes.

Description

Technical Field

[0001] This invention relates to the field of edge banding machine technology, specifically to a PUR adhesive mixing process method for edge banding. Background Technology

[0002] In custom panel edge banding, PUR adhesive has traditionally been applied in a single color, resulting in monochromatic edge banding. This often leads to noticeable color differences in the adhesive lines, especially with gray or khaki panels. This restricts the processing of other color options, making the products less competitive and less appealing. However, with increasing market demand for personalization and customization, traditional single-color adhesive edge banding is no longer sufficient for gray, khaki, and gradient color panels. Single-color application results in noticeable color differences in the adhesive lines on gray and khaki panels, negatively impacting the product's appearance. Summary of the Invention

[0003] The purpose of this invention is to provide a PUR mixing process for edge sealing, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a PUR mixing process for edge banding, the method comprising the following steps:

[0005] S1. Preparation of edge sealing adhesive: First, prepare the PUR adhesive by selecting polyurethane raw materials that meet environmental protection requirements. Through precise measurement, mix the raw materials in proportion and add the mixed PUR raw material adhesive to the corresponding PUR adhesive dispenser.

[0006] S2. Intelligent PUR glue dispensing machine system settings, which intelligently adjust the opening degree, glue temperature, and pump speed of two single-color PUR glue dispensing machines, and the intelligent PUR glue dispensing machine system settings include:

[0007] Step 1: Valve opening setting. Intelligent adjustment of the opening of the dispensing valves of the two single-color PUR glue dispensers is performed to ensure that the valve opening of the two glue dispenser units is synchronized in the mixing mode. The glue volume ratio is adjusted by the difference in the speed of the glue pump to form a color similar to the surface of the workpiece.

[0008] Step 2: Glue temperature setting. Adjust the glue temperature of the two single-color PUR glue dispensers. Adjust the glue tube and pressure plate temperature settings according to the glue type and ambient temperature changes to ensure the glue hot melt state is stable in PUR mixing mode based on the effective flow rate of glue under different conditions.

[0009] Step 3: Setting the glue supply frequency. Set the frequency of the two single-color PUR glue supply systems: Set a basic frequency value for the speed of the glue supply machine pressure pump to ensure that the motor speed is too low or too high, which will affect the glue dispensing, and ensure that the output glue flow rate is locked in the intelligent mixing mode.

[0010] S3. High-precision color recognition sensor calibration: First, the pure white edge banding is calibrated with color mark and a digital signal is generated. The white calibration is extended to full color gamut management, supporting khaki color system, gradient mixing and other color systems. The calibration return value is set as the reference value.

[0011] S4. System setting confirmation: Through steps S2 and S3, the glue supply machine pressure is synchronously adjusted, the glue hot melt is stabilized, the flow rate benchmark is locked, the color recognition benchmark is established, and information confirmation is performed.

[0012] S5. Construction of multi-system collaborative action: The above steps are used to construct a three-in-one system of "glue supply-identification-glue application". Through closed-loop control logic, relevant color system data information is extracted and sent to the programmable controller for secondary logic processing. After logic analysis, it is uploaded to the pre-stored formula database of the host computer central control system for matching. The matching result is sent to the execution unit to dynamically adjust the mixing ratio.

[0013] S6. Implement mixing ratio control: When the central control computer issues the formula, it automatically detects whether the glue temperature of the glue supply machine meets the standard. If it does, it adjusts the frequency of the pressure pump of the dual glue supply machine according to the formula, that is, controls the flow rate, and the valve opening time, that is, controls the glue output. At the same time, the glue application unit stirs and mixes the glue to ensure that the glue uniformity meets the standard.

[0014] S7. Glue Application and Edge Sealing Inspection: The color is achieved through glue mixing. PUR adhesive is evenly applied to the edge of the edge banding tape or board. The edge banding tape is then attached to the board, and pressure is applied to ensure a firm bond. After a certain period of heating and cooling, the PUR adhesive undergoes a chemical reaction under the influence of moisture in the air, forming strong chemical bonds and completing the edge sealing process. Color difference is then detected on the edge-sealed product to determine the final glue and color mixing results. The glue mixing ratio that meets the color requirements is recorded.

[0015] Preferably, in step S1, during the mixing of the adhesive, an appropriate amount of catalyst and stabilizer are added to improve the curing speed and stability of the PUR adhesive.

[0016] Preferably, in the valve opening setting of step S2, when closed-loop feedback control is used, it is ensured that the two glue outputs are evenly mixed and the color is adjusted, and the deviation is 0.5%-1.5%.

[0017] Preferably, in step S3, the calibration return value is set as a baseline value, and the color of the processed board surface or the pre-processed edge banding is used to collect the mixing ratio of the two different adhesives, so as to achieve the consistency between the glue color and the board surface color.

[0018] Preferably, in step S6, the adhesive application unit stirs and mixes the adhesive every 2 seconds for 1 minute and then automatically stops to ensure that the adhesive uniformity meets the standard.

[0019] Preferably, in step S7, the edge sealing is heated by hot air blowing through a dryer for 10-15 minutes, and the cooling is achieved by cooling with a heat dissipation fan for 15-20 minutes.

[0020] Preferably, in step S1 of preparing the edge-sealing adhesive, the raw materials are heat-treated according to the mixing process, and the heating temperature is 40-50℃.

[0021] Preferably, in step S3, when color-coding the pure white edge banding, a 16-bit digital signal containing hue, brightness, and saturation is generated.

[0022] Preferably, in step S5, the closed-loop control logic involves a color sensor scanning the edge banding color in real time, extracting color feature data, and analyzing the data through a sensor central system to extract relevant color data information.

[0023] Preferably, in step S5, the closed-loop control logic dynamically adjusts the glue dispensing ratio of the glue feeder based on the edge banding color data fed back by the sensor through the programmable controller, and the glue coating unit simultaneously optimizes the glue line thickness and coating speed to ensure uniform glue mixing.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] This invention integrates an edge banding machine glue application unit, a color recognition module, and an intelligent PUR glue supply system to achieve PUR mixed glue processing. It solves the problem that traditional single-color glue supply machines only support single glue output, and in particular, it solves the problem of controlling the glue line and color difference of the edge banding board, meeting the processing needs of gray and khaki colors, overcoming the problem of color difference control for edge banding of different colored boards, and creatively utilizing color mixing and glue mixing technology to greatly enrich the selectivity of edge banding processes. Attached Figure Description

[0026] Figure 1 This is a process flow diagram of the present invention;

[0027] Figure 2 This is a process diagram illustrating the control of the mixing ratio in this invention. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1-2 ,

[0030] Example 1

[0031] This invention provides a PUR mixing process for edge banding, the method comprising the following steps:

[0032] S1. Preparation of edge sealing adhesive: First, prepare the PUR adhesive by selecting polyurethane raw materials that meet environmental protection requirements. Through precise measurement, mix the raw materials in proportion and add the mixed PUR raw material adhesive to the corresponding PUR adhesive dispenser.

[0033] S2, Intelligent PUR Glue Dispenser System Settings: This system allows for intelligent adjustment of the opening degree, glue temperature, and pump speed of two single-color PUR glue dispensers. The intelligent PUR glue dispenser system settings include:

[0034] Step 1: Valve opening setting. Intelligent adjustment of the opening of the dispensing valves of the two single-color PUR glue dispensers is performed to ensure that the valve opening of the two glue dispenser units is synchronized in the mixing mode. The glue volume ratio is adjusted by the difference in the speed of the glue pump to form a color similar to the surface of the workpiece.

[0035] Step 2: Glue temperature setting. Adjust the glue temperature of the two single-color PUR glue dispensers. Adjust the glue tube and pressure plate temperature settings according to the glue type and ambient temperature changes to ensure the glue hot melt state is stable in PUR mixing mode based on the effective flow rate of glue under different conditions.

[0036] Step 3: Setting the glue supply frequency. Set the frequency of the two single-color PUR glue supply systems: Set a basic frequency value for the speed of the glue supply machine pressure pump to ensure that the motor speed is too low or too high, which will affect the glue dispensing, and ensure that the output glue flow rate is locked in the intelligent mixing mode.

[0037] S3. High-precision color recognition sensor calibration: First, the pure white edge banding is calibrated with color mark and a digital signal is generated. The white calibration is extended to full color gamut management, supporting khaki color system, gradient mixing and other color systems. The calibration return value is set as the reference value.

[0038] S4. System setting confirmation: Through steps S2 and S3, the glue supply machine pressure is synchronously adjusted, the glue hot melt is stabilized, the flow rate benchmark is locked, the color recognition benchmark is established, and information confirmation is performed.

[0039] S5. Construction of multi-system collaborative action: The above steps are used to construct a three-in-one system of "glue supply-identification-glue application". Through closed-loop control logic, relevant color system data information is extracted and sent to the programmable controller for secondary logic processing. After logic analysis, it is uploaded to the pre-stored formula database of the host computer central control system for matching. The matching result is sent to the execution unit to dynamically adjust the mixing ratio.

[0040] S6. Implement mixing ratio control: When the central control computer issues the formula, it automatically detects whether the glue temperature of the glue supply machine meets the standard. If it does, it adjusts the frequency of the pressure pump of the dual glue supply machine according to the formula, that is, controls the flow rate, and the valve opening time, that is, controls the glue output. At the same time, the glue application unit stirs and mixes the glue to ensure that the glue uniformity meets the standard.

[0041] S7. Glue Application and Edge Sealing Inspection: The color is achieved through glue mixing. PUR adhesive is evenly applied to the edge of the edge banding tape or board. The edge banding tape is then attached to the board, and pressure is applied to ensure a firm bond. After a certain period of heating and cooling, the PUR adhesive undergoes a chemical reaction under the influence of moisture in the air, forming strong chemical bonds and completing the edge sealing process. Color difference is then detected on the edge-sealed product to determine the final glue and color mixing results. The glue mixing ratio that meets the color requirements is recorded.

[0042] In step S1, during the mixing of adhesives, an appropriate amount of catalyst and stabilizer are added to improve the curing speed and stability of the PUR adhesive. In step S1, during the preparation of the sealing adhesive, the raw materials are heat-treated during the mixing process, and the heating temperature is 45°C. In step S2, when the valve opening setting is adopted, closed-loop feedback control is used to ensure that the adhesive output from both channels is uniformly mixed and the color is adjusted, and the deviation is 1%.

[0043] In step S3, after the calibration return value is set as the baseline value, the color of the processed board surface or the color of the pre-processed edge banding strip is checked to collect the mixing ratio of two different adhesives, so as to achieve the consistency between the glue color and the board surface color. In step S3, when the pure white edge banding strip is calibrated with a color mark, a 16-bit digital signal containing hue, brightness, and saturation is generated. In step S5, the closed-loop control logic is that the color sensor scans the edge banding strip color in real time, extracts color feature data, and analyzes it through the sensor central system to extract relevant color data information. In step S5, the closed-loop control logic dynamically adjusts the glue dispensing ratio of the glue feeder according to the edge banding strip color data fed back by the sensor through the programmable controller. The glue application unit simultaneously optimizes the glue line thickness and glue application speed to ensure uniform glue mixing.

[0044] In step S6, the adhesive application unit stirs and mixes the adhesive every 2 seconds for 1 minute and then stops automatically to ensure that the adhesive uniformity meets the standard. In step S7, the edge sealing is heated by hot air blowing through a dryer for 12 minutes, and the cooling is achieved by cooling with a heat dissipation fan for 20 minutes.

[0045] Example 2

[0046] This invention provides a PUR mixing process for edge banding, the method comprising the following steps:

[0047] S1. Preparation of edge sealing adhesive: First, prepare the PUR adhesive by selecting polyurethane raw materials that meet environmental protection requirements. Through precise measurement, mix the raw materials in proportion and add the mixed PUR raw material adhesive to the corresponding PUR adhesive dispenser.

[0048] S2, Intelligent PUR Glue Dispenser System Settings: This system allows for intelligent adjustment of the opening degree, glue temperature, and pump speed of two single-color PUR glue dispensers. The intelligent PUR glue dispenser system settings include:

[0049] Step 1: Valve opening setting. Intelligent adjustment of the opening of the dispensing valves of the two single-color PUR glue dispensers is performed to ensure that the valve opening of the two glue dispenser units is synchronized in the mixing mode. The glue volume ratio is adjusted by the difference in the speed of the glue pump to form a color similar to the surface of the workpiece.

[0050] Step 2: Glue temperature setting. Adjust the glue temperature of the two single-color PUR glue dispensers. Adjust the glue tube and pressure plate temperature settings according to the glue type and ambient temperature changes to ensure the glue hot melt state is stable in PUR mixing mode based on the effective flow rate of glue under different conditions.

[0051] Step 3: Setting the glue supply frequency. Set the frequency of the two single-color PUR glue supply systems: Set a basic frequency value for the speed of the glue supply machine pressure pump to ensure that the motor speed is too low or too high, which will affect the glue dispensing, and ensure that the output glue flow rate is locked in the intelligent mixing mode.

[0052] S3. High-precision color recognition sensor calibration: First, the pure white edge banding is calibrated with color mark and a digital signal is generated. The white calibration is extended to full color gamut management, supporting khaki color system, gradient mixing and other color systems. The calibration return value is set as the reference value.

[0053] S4. System setting confirmation: Through steps S2 and S3, the glue supply machine pressure is synchronously adjusted, the glue hot melt is stabilized, the flow rate benchmark is locked, the color recognition benchmark is established, and information confirmation is performed.

[0054] S5. Construction of multi-system collaborative action: The above steps are used to construct a three-in-one system of "glue supply-identification-glue application". Through closed-loop control logic, relevant color system data information is extracted and sent to the programmable controller for secondary logic processing. After logic analysis, it is uploaded to the pre-stored formula database of the host computer central control system for matching. The matching result is sent to the execution unit to dynamically adjust the mixing ratio.

[0055] S6. Implement mixing ratio control: When the central control computer issues the formula, it automatically detects whether the glue temperature of the glue supply machine meets the standard. If it does, it adjusts the frequency of the pressure pump of the dual glue supply machine according to the formula, that is, controls the flow rate, and the valve opening time, that is, controls the glue output. At the same time, the glue application unit stirs and mixes the glue to ensure that the glue uniformity meets the standard.

[0056] S7. Glue Application and Edge Sealing Inspection: The color is achieved through glue mixing. PUR adhesive is evenly applied to the edge of the edge banding tape or board. The edge banding tape is then attached to the board, and pressure is applied to ensure a firm bond. After a certain period of heating and cooling, the PUR adhesive undergoes a chemical reaction under the influence of moisture in the air, forming strong chemical bonds and completing the edge sealing process. Color difference is then detected on the edge-sealed product to determine the final glue and color mixing results. The glue mixing ratio that meets the color requirements is recorded.

[0057] In step S1, during the mixing of adhesives, an appropriate amount of catalyst and stabilizer are added to improve the curing speed and stability of the PUR adhesive. In step S1, during the preparation of the sealing adhesive, the raw materials are heat-treated during the mixing process, and the heating temperature is 48°C. In step S2, when setting the valve opening, closed-loop feedback control is used to ensure that the adhesive output from both channels is uniformly mixed and the color is adjusted, and the deviation is 1.5%.

[0058] In step S3, after the calibration return value is set as the baseline value, the color of the processed board surface or the color of the pre-processed edge banding strip is checked to collect the mixing ratio of two different adhesives, so as to achieve the consistency between the glue color and the board surface color. In step S3, when the pure white edge banding strip is calibrated with a color mark, a 16-bit digital signal containing hue, brightness, and saturation is generated. In step S5, the closed-loop control logic is that the color sensor scans the edge banding strip color in real time, extracts color feature data, and analyzes it through the sensor central system to extract relevant color data information. In step S5, the closed-loop control logic dynamically adjusts the glue dispensing ratio of the glue feeder according to the edge banding strip color data fed back by the sensor through the programmable controller. The glue application unit simultaneously optimizes the glue line thickness and glue application speed to ensure uniform glue mixing.

[0059] In step S6, the adhesive application unit stirs and mixes the adhesive every 2 seconds for 1 minute and then stops automatically to ensure that the adhesive uniformity meets the standard. In step S7, the edge sealing is heated by hot air blowing through a dryer for 15 minutes, and the cooling is achieved by cooling with a heat dissipation fan for 20 minutes.

[0060] Example 3

[0061] This invention provides a PUR mixing process for edge banding, the method comprising the following steps:

[0062] S1. Preparation of edge sealing adhesive: First, prepare the PUR adhesive by selecting polyurethane raw materials that meet environmental protection requirements. Through precise measurement, mix the raw materials in proportion and add the mixed PUR raw material adhesive to the corresponding PUR adhesive dispenser.

[0063] S2, Intelligent PUR Glue Dispenser System Settings: This system allows for intelligent adjustment of the opening degree, glue temperature, and pump speed of two single-color PUR glue dispensers. The intelligent PUR glue dispenser system settings include:

[0064] Step 1: Valve opening setting. Intelligent adjustment of the opening of the dispensing valves of the two single-color PUR glue dispensers is performed to ensure that the valve opening of the two glue dispenser units is synchronized in the mixing mode. The glue volume ratio is adjusted by the difference in the speed of the glue pump to form a color similar to the surface of the workpiece.

[0065] Step 2: Glue temperature setting. Adjust the glue temperature of the two single-color PUR glue dispensers. Adjust the glue tube and pressure plate temperature settings according to the glue type and ambient temperature changes to ensure the glue hot melt state is stable in PUR mixing mode based on the effective flow rate of glue under different conditions.

[0066] Step 3: Setting the glue supply frequency. Set the frequency of the two single-color PUR glue supply systems: Set a basic frequency value for the speed of the glue supply machine pressure pump to ensure that the motor speed is too low or too high, which will affect the glue dispensing, and ensure that the output glue flow rate is locked in the intelligent mixing mode.

[0067] S3. High-precision color recognition sensor calibration: First, the pure white edge banding is calibrated with color mark and a digital signal is generated. The white calibration is extended to full color gamut management, supporting khaki color system, gradient mixing and other color systems. The calibration return value is set as the reference value.

[0068] S4. System setting confirmation: Through steps S2 and S3, the glue supply machine pressure is synchronously adjusted, the glue hot melt is stabilized, the flow rate benchmark is locked, the color recognition benchmark is established, and information confirmation is performed.

[0069] S5. Construction of multi-system collaborative action: The above steps are used to construct a three-in-one system of "glue supply-identification-glue application". Through closed-loop control logic, relevant color system data information is extracted and sent to the programmable controller for secondary logic processing. After logic analysis, it is uploaded to the pre-stored formula database of the host computer central control system for matching. The matching result is sent to the execution unit to dynamically adjust the mixing ratio.

[0070] S6. Implement mixing ratio control: When the central control computer issues the formula, it automatically detects whether the glue temperature of the glue supply machine meets the standard. If it does, it adjusts the frequency of the pressure pump of the dual glue supply machine according to the formula, that is, controls the flow rate, and the valve opening time, that is, controls the glue output. At the same time, the glue application unit stirs and mixes the glue to ensure that the glue uniformity meets the standard.

[0071] S7. Glue Application and Edge Sealing Inspection: The color is achieved through glue mixing. PUR adhesive is evenly applied to the edge of the edge banding tape or board. The edge banding tape is then attached to the board, and pressure is applied to ensure a firm bond. After a certain period of heating and cooling, the PUR adhesive undergoes a chemical reaction under the influence of moisture in the air, forming strong chemical bonds and completing the edge sealing process. Color difference is then detected on the edge-sealed product to determine the final glue and color mixing results. The glue mixing ratio that meets the color requirements is recorded.

[0072] In step S1, during the mixing of adhesives, an appropriate amount of catalyst and stabilizer are added to improve the curing speed and stability of the PUR adhesive. In step S1, during the preparation of the sealing adhesive, the raw materials are heat-treated during the mixing process, and the heating temperature is 40°C. In step S2, when setting the valve opening, closed-loop feedback control is used to ensure that the adhesive output from both channels is uniformly mixed and the color is adjusted, and the deviation is 0.5%.

[0073] In step S3, after the calibration return value is set as the baseline value, the color of the processed board surface or the color of the pre-processed edge banding strip is checked to collect the mixing ratio of two different adhesives, so as to achieve the consistency between the glue color and the board surface color. In step S3, when the pure white edge banding strip is calibrated with a color mark, a 16-bit digital signal containing hue, brightness, and saturation is generated. In step S5, the closed-loop control logic is that the color sensor scans the edge banding strip color in real time, extracts color feature data, and analyzes it through the sensor central system to extract relevant color data information. In step S5, the closed-loop control logic dynamically adjusts the glue dispensing ratio of the glue feeder according to the edge banding strip color data fed back by the sensor through the programmable controller. The glue application unit simultaneously optimizes the glue line thickness and glue application speed to ensure uniform glue mixing.

[0074] In step S6, the adhesive application unit stirs and mixes the adhesive every 2 seconds for 1 minute and then stops automatically to ensure that the adhesive uniformity meets the standard. In step S7, the edge sealing is heated by hot air blowing through a dryer for 10 minutes, and the cooling is achieved by cooling with a heat dissipation fan for 15 minutes.

[0075] Example 4

[0076] This invention provides a PUR mixing process for edge banding, the method comprising the following steps:

[0077] S1. Preparation of edge sealing adhesive: First, prepare the PUR adhesive by selecting polyurethane raw materials that meet environmental protection requirements. Through precise measurement, mix the raw materials in proportion and add the mixed PUR raw material adhesive to the corresponding PUR adhesive dispenser.

[0078] S2, Intelligent PUR Glue Dispenser System Settings: This system allows for intelligent adjustment of the opening degree, glue temperature, and pump speed of two single-color PUR glue dispensers. The intelligent PUR glue dispenser system settings include:

[0079] Step 1: Valve opening setting. Intelligent adjustment of the opening of the dispensing valves of the two single-color PUR glue dispensers is performed to ensure that the valve opening of the two glue dispenser units is synchronized in the mixing mode. The glue volume ratio is adjusted by the difference in the speed of the glue pump to form a color similar to the surface of the workpiece.

[0080] Step 2: Glue temperature setting. Adjust the glue temperature of the two single-color PUR glue dispensers. Adjust the glue tube and pressure plate temperature settings according to the glue type and ambient temperature changes to ensure the glue hot melt state is stable in PUR mixing mode based on the effective flow rate of glue under different conditions.

[0081] Step 3: Setting the glue supply frequency. Set the frequency of the two single-color PUR glue supply systems: Set a basic frequency value for the speed of the glue supply machine pressure pump to ensure that the motor speed is too low or too high, which will affect the glue dispensing, and ensure that the output glue flow rate is locked in the intelligent mixing mode.

[0082] S3. High-precision color recognition sensor calibration: First, the pure white edge banding is calibrated with color mark and a digital signal is generated. The white calibration is extended to full color gamut management, supporting khaki color system, gradient mixing and other color systems. The calibration return value is set as the reference value.

[0083] S4. System setting confirmation: Through steps S2 and S3, the glue supply machine pressure is synchronously adjusted, the glue hot melt is stabilized, the flow rate benchmark is locked, the color recognition benchmark is established, and information confirmation is performed.

[0084] S5. Construction of multi-system collaborative action: The above steps are used to construct a three-in-one system of "glue supply-identification-glue application". Through closed-loop control logic, relevant color system data information is extracted and sent to the programmable controller for secondary logic processing. After logic analysis, it is uploaded to the pre-stored formula database of the host computer central control system for matching. The matching result is sent to the execution unit to dynamically adjust the mixing ratio.

[0085] S6. Implement mixing ratio control: When the central control computer issues the formula, it automatically detects whether the glue temperature of the glue supply machine meets the standard. If it does, it adjusts the frequency of the pressure pump of the dual glue supply machine according to the formula, that is, controls the flow rate, and the valve opening time, that is, controls the glue output. At the same time, the glue application unit stirs and mixes the glue to ensure that the glue uniformity meets the standard.

[0086] S7. Glue Application and Edge Sealing Inspection: The color is achieved through glue mixing. PUR adhesive is evenly applied to the edge of the edge banding tape or board. The edge banding tape is then attached to the board, and pressure is applied to ensure a firm bond. After a certain period of heating and cooling, the PUR adhesive undergoes a chemical reaction under the influence of moisture in the air, forming strong chemical bonds and completing the edge sealing process. Color difference is then detected on the edge-sealed product to determine the final glue and color mixing results. The glue mixing ratio that meets the color requirements is recorded.

[0087] In step S1, during the mixing of adhesives, an appropriate amount of catalyst and stabilizer are added to improve the curing speed and stability of the PUR adhesive. In step S1, during the preparation of the sealing adhesive, the raw materials are heat-treated during the mixing process, and the heating temperature is 45°C. In step S2, when setting the valve opening, closed-loop feedback control is used to ensure that the adhesive output from both channels is uniformly mixed and the color is adjusted, and the deviation is 0.8%.

[0088] In step S3, after the calibration return value is set as the baseline value, the color of the processed board surface or the color of the pre-processed edge banding strip is checked to collect the mixing ratio of two different adhesives, so as to achieve the consistency between the glue color and the board surface color. In step S3, when the pure white edge banding strip is calibrated with a color mark, a 16-bit digital signal containing hue, brightness, and saturation is generated. In step S5, the closed-loop control logic is that the color sensor scans the edge banding strip color in real time, extracts color feature data, and analyzes it through the sensor central system to extract relevant color data information. In step S5, the closed-loop control logic dynamically adjusts the glue dispensing ratio of the glue feeder according to the edge banding strip color data fed back by the sensor through the programmable controller. The glue application unit simultaneously optimizes the glue line thickness and glue application speed to ensure uniform glue mixing.

[0089] In step S6, the adhesive application unit stirs and mixes the adhesive every 2 seconds for 1 minute and then stops automatically to ensure that the adhesive uniformity meets the standard. In step S7, the edge sealing is heated by hot air blowing through a dryer for 12 minutes, and the cooling is achieved by cooling with a heat dissipation fan for 17 minutes.

[0090] In practical use, this invention provides a PUR adhesive mixing process for edge banding. Specifically, this invention upgrades traditional straight-line edge banding machines by introducing the following key improvements: an intelligent PUR adhesive dispenser, working in conjunction with an adhesive dispensing system, supports the mixed output of two types of adhesive. By adjusting the opening of the dispensing valve and the frequency of the pressure pump, the mixing ratio of different colored adhesives is controlled. Furthermore, a high-precision color recognition sensor scans the surface color characteristics of the edge banding tape in real time, converting the color data into hue, brightness, and saturation parameters to generate the corresponding mixing formula. During mixing, a closed-loop control logic is implemented. The programmable controller dynamically adjusts the dispensing ratio of the adhesive dispenser based on the edge banding tape color data fed back by the sensor. The coating unit simultaneously optimizes the adhesive line thickness and coating speed to ensure uniform mixing, thereby meeting the requirements of the PUR adhesive mixing process.

[0091] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A PUR glueing process method for edge banding process, characterized in that, The method includes the following steps: S1. Preparation of edge sealing adhesive: First, prepare the PUR adhesive by selecting polyurethane raw materials that meet environmental protection requirements. Through precise measurement, mix the raw materials in proportion and add the mixed PUR raw material adhesive to the corresponding PUR adhesive dispenser. S2. Intelligent PUR glue dispensing machine system settings, which intelligently adjust the opening degree, glue temperature, and pump speed of two single-color PUR glue dispensing machines, and the intelligent PUR glue dispensing machine system settings include: Step 1: Valve opening setting. Intelligent adjustment of the opening of the dispensing valves of the two single-color PUR glue dispensers is performed to ensure that the valve opening of the two glue dispenser units is synchronized in the mixing mode. The glue volume ratio is adjusted by the difference in the speed of the glue pump to form a color consistent with the workpiece surface. Step 2: Glue temperature setting. Adjust the glue temperature of the two single-color PUR glue dispensers. Adjust the glue hose and pressure plate temperature settings according to the glue type and ambient temperature changes to ensure the glue hot melt state is stable in PUR mixing mode based on the effective flow rate of glue under different conditions. Step 3: Setting the glue supply frequency. Set the frequency of the two single-color PUR glue supply systems: Set a basic frequency value for the speed of the glue supply machine pressure pump to avoid the motor speed being too low or too high and affecting the glue dispensing, so as to ensure that the output glue flow rate is locked in the intelligent mixing mode. S3. High-precision color recognition sensor calibration: First, the pure white edge banding is calibrated with color mark and a digital signal is generated. The white calibration is extended to full color gamut management, supporting khaki and gradient color mixing systems. The generated digital signal value of this calibration is set as the reference value. S4. System setting confirmation: Through steps S2 and S3, the glue supply machine pressure is synchronously adjusted, the glue hot melt is stabilized, the flow rate benchmark is locked, the color recognition benchmark is established, and information confirmation is performed. S5. Construction of Multi-System Collaborative Action: Through the above steps, a three-in-one system of glue supply-identification-glue application is constructed. Through closed-loop control logic: the color sensor scans the color of the sealing tape in real time, extracts color feature data, analyzes it through the sensor central system, extracts relevant color data information and sends it to the programmable controller for secondary logic processing. After logic analysis, it is uploaded to the upper computer central control system, matched through the pre-stored formula database, and the matching result is sent to the execution unit to dynamically control the glue mixing ratio. S6. Implement mixing ratio control: When the central control computer issues the formula, it automatically detects whether the glue temperature of the glue supply machine meets the standard. If it does, it adjusts the frequency of the pressure pump of the dual glue supply machine and the valve opening time according to the formula. At the same time, the glue application unit stirs and mixes the glue to ensure that the glue uniformity meets the standard. S7. Glue Application and Edge Sealing Inspection: The color is achieved through glue mixing. PUR adhesive is evenly applied to the edge of the edge banding tape or board. The edge banding tape is then attached to the board, and pressure is applied to ensure a firm bond. After a certain period of heating and cooling, the PUR adhesive undergoes a chemical reaction under the influence of moisture in the air, forming strong chemical bonds and completing the edge sealing process. Color difference is then detected on the edge-sealed product to determine the final glue and color mixing results. The glue mixing ratio that meets the color requirements is recorded.

2. The PUR adhesive mixing process for edge banding as described in claim 1, characterized in that: In step S1, during the mixing of the adhesive, an appropriate amount of catalyst and stabilizer are added to improve the curing speed and stability of the PUR adhesive.

3. The PUR adhesive mixing process for edge banding as described in claim 1, characterized in that: In the valve opening setting of step S2, when closed-loop feedback control is used, it is ensured that the glue output of the two channels is evenly mixed and the color is adjusted, and the deviation is 0.5%-1.5%.

4. The PUR adhesive mixing process for edge banding as described in claim 1, characterized in that: After setting the benchmark value in step S3, the color of the processed board surface or the color of the pre-processed edge banding strip is checked. The mixing ratio of the two different adhesives is then configured to achieve the same color of the adhesive as the board surface.

5. The PUR adhesive mixing process for edge banding as described in claim 1, characterized in that: In step S6, the adhesive application unit stirs and mixes the adhesive at a frequency of 2 seconds per stirring interval, and then automatically stops after 1 minute to ensure that the adhesive uniformity meets the standard.

6. The PUR mixing process method for edge banding according to claim 1, characterized in that: In step S7, the edge sealing is heated by hot air blowing through a dryer for 10-15 minutes, and the cooling is achieved by cooling with a heat dissipation fan for 15-20 minutes.

7. The PUR adhesive mixing process for edge banding as described in claim 1, characterized in that: In step S1, the edge-sealing adhesive is prepared by heat treatment during the mixing of raw materials, and the heating temperature is 40-50℃.

8. The PUR adhesive mixing process for edge sealing as described in claim 1, characterized in that: In step S3, when color-coding the pure white edge banding, a 16-bit digital signal containing hue, brightness, and saturation is generated.

9. A PUR adhesive mixing process for edge banding according to claim 1, characterized in that: In step S5, the closed-loop control logic dynamically adjusts the glue dispensing ratio of the glue feeder based on the edge banding color data fed back by the sensor through the programmable controller, and the glue coating unit simultaneously optimizes the glue line thickness and coating speed to ensure uniform glue mixing.

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