Automatic blending and recycling system for coating liquid and use method

Abstract

The invention relates to the field of coating liquid blending, in particular to a coating liquid automatic blending and recycling system and a using method.The coating liquid automatic blending and recycling system comprises a supply module, an automatic blending module, a recycling module and a real-time monitoring and control module, and the supply module comprises a raw material storage system, a conveying system and a pre-filtering system; the automatic blending module comprises a proportion adjusting system, a viscosity adjusting system and a stirring system, the recycling module comprises a backflow system, a filtering system and a liquid level monitoring system, the real-time monitoring and control module comprises a sensor set, a PLC control system, a human-computer interface and coating equipment, and the PLC control system controls the proportion adjusting system and the viscosity adjusting system or controls the stirring system and the liquid level monitoring system. The PLC control system controls the viscosity adjusting system, and the viscosity adjusting system controls the stirring system to evenly coat the coating liquid on the surface of a base material plate. The device has the advantages that the utilization rate of the coating liquid can be increased, the quality of the coating liquid is improved, and the production cost is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of coating liquid preparation, and particularly to an automatic preparation and recycling system for coating liquid and a usage method thereof.

Background Art

[0002] Coating technology is widely used in the fields of optical materials, electronic components, printing, and coatings. The core is to evenly and precisely coat the coating liquid on the surface of the substrate through equipment. However, there are many deficiencies in current coating equipment. At present, some high-end coating machines on the market integrate basic coating liquid recycling systems, but mostly adopt simple pump transportation and reflux designs, and cannot adjust the parameters of the coating liquid in real time, such as concentration and viscosity. Sensors can be used to monitor the state of the coating liquid, but the adjustment process still requires manual participation, and closed-loop control cannot be achieved, making it difficult to meet the requirements of modern production for high precision and high efficiency.

[0003] In the coating process, the preparation and recycling of the coating liquid are key links, directly affecting the coating quality and production cost. The present invention aims at the technical problems existing in the existing coating equipment, such as serious waste of coating liquid, large manual operation errors, unstable coating effects, and high waste liquid treatment costs. The existing coating machines lack effective coating liquid recycling and reuse devices, resulting in the direct discard of the remaining coating liquid, wasting resources and increasing costs. Moreover, it is easy to have deviations when manually adjusting the ratio and viscosity of the coating liquid, affecting the coating quality. At the same time, the amount of waste liquid to be treated is large, and improper treatment will cause environmental pollution.

[0004] Therefore, an automatic preparation and recycling system for coating liquid and a usage method thereof are provided, which can improve the utilization rate of the coating liquid, improve the quality of the coating liquid, and effectively reduce the production cost.

Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an automatic preparation and recycling system for coating liquid and a usage method thereof, which can improve the utilization rate of the coating liquid, improve the quality of the coating liquid, and effectively reduce the production cost.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An automatic dispensing and recycling system for coating liquid, comprising a supply module, an automatic dispensing module, a recycling module, and a real-time monitoring and control module. The supply module includes a raw material storage system, a conveying system, and a pre-filtering system. The automatic dispensing module includes a proportion adjustment system, a viscosity adjustment system, and a stirring system. The recycling module includes a reflux system, a filtering system, and a liquid level monitoring system. The real-time monitoring and control module includes a sensor group, a PLC control system, and a human-machine interface. There is also a coating device. The PLC control system controls the proportion adjustment system and the viscosity adjustment system, or the PLC control system controls the viscosity adjustment system, and the viscosity adjustment system controls the stirring system to evenly coat the coating liquid on the substrate surface. Then the remaining coating liquid is sequentially recycled to the reflux system, the filtering system, and the liquid level monitoring system. The coating liquid is then sequentially conveyed to the raw material storage system, the conveying system, and the pre-filtering system. The filtered coating liquid finally enters the proportion adjustment system. The supply module, the automatic dispensing module, the recycling module, and the real-time monitoring and control module operate cyclically to adjust the coating liquid.

[0008] Preferably, the PLC control system simultaneously controls the proportion adjustment system, the viscosity adjustment system, the conveying system, the coating device, the reflux system, and the human-machine interface.

[0009] Preferably, there is also an execution module. The PLC control system realizes the control of the execution module through data acquisition, real-time analysis, parameter comparison, and generation of control instructions. The sensor group includes a concentration sensor, a viscosity sensor, a humidity sensor, a flow rate sensor, and a pressure sensor. The execution module includes a proportional valve, a heating and cooling device, and a delivery pump.

[0010] Preferably, the raw material storage system stores the basic raw materials of the coating liquid, including solvents and coating materials. The conveying system transports the coating liquid raw materials to the automatic dispensing module. The pre-filtering system preliminarily removes large particle impurities during the raw material transportation process to avoid damage to the subsequent dispensing system. The proportion adjustment system adjusts the proportion of the solvent and the coating material in real time according to the formula. The viscosity adjustment system adjusts the viscosity of the coating liquid. The stirring system ensures that the concentration of the mixed coating liquid is the same. The reflux system recovers the unconsumed coating liquid from the coating machine. The filtering system removes impurities in the reflux liquid to ensure the quality of the coating liquid for reuse. The liquid level monitoring system monitors the liquid level state in the reflux system in real time. The sensor group collects the concentration, viscosity, temperature, flow rate, and pressure parameters of the coating liquid in real time.

[0011] A method for automatically dispensing, recycling, and reusing coating liquid, comprising:

[0012] S1. The coating liquid raw materials enter the automatic dispensing module through the supply module. The sensor group monitors the initial parameters of the coating liquid and makes precise adjustments by controlling the proportional valve and the stirring system;

[0013] S2. The formulated coating solution enters the coater for coating. During the coating process, the real-time monitoring and control module collects data in real time and adjusts the liquid supply flow rate and pressure parameters;

[0014] S3. The unused coating solution enters the recovery module through the reflux pipeline, and after filtration and detection, it returns to the raw material storage system;

[0015] S4. Closed-loop operation is achieved under the coordination of the real-time monitoring and control module.

[0016] Preferably, according to the total mass of the coating solution and the current solid content collected in real time, the calculation formula for the addition amount is In the formula, M 1 is the mass of pure solid matter to be added, M 2 is the total mass of the current coating solution, C 1 is the target solid content, C 2 is the current fixed content.

[0017] Preferably, according to the existing viscosity of the coating solution collected in real time, the mass of the solvent to be added is calculated, and the formula is In the formula, M 3 is the mass of the solvent to be added, M 4 is the total mass of the current coating solution, U 1 is the viscosity of the current coating solution, U 2 is the viscosity of the target coating solution.

[0018] Preferably, the sensor group sends real-time data to the PLC control system. The PLC control system adjusts key parameters such as proportional valves and pump speeds according to preset logic, and the human-machine interface displays the system status and provides manual operation options.

[0019] A computer-readable storage medium stores a computer program thereon, and when the program is executed by a processor, it implements the steps of the above method.

[0020] Beneficial effects of adopting the present invention:

[0021] 1. According to the total mass of the coating solution and the current solid content collected in real time, the calculation formula for the addition amount is In the formula, M 1 is the mass of pure solid matter to be added, M 2 is the total mass of the current coating solution, C 1 is the target solid content, C 2 is the current fixed content. It improves the calculation accuracy, and can ensure the standard rate of the coating solution content by detecting and calculating the coating solution in real time.

[0022] Examples are:

[0023] M 2 = 1000g, C2 = 40%, C 1 = 50%.

[0024] Sensor feedback: After the PLC collects the initial parameters, calculate M 1 = 200 g.

[0025] Execution action: The supply module provides pure solid substances. After being mixed by the automatic dispensing module through the stirring system, the real-time monitoring and control module verifies the final result.

[0026] 2. Calculate the mass of the solvent to be added based on the current viscosity of the coating solution collected in real time. The formula is In the formula, M 3 is the mass of the solvent to be added, M 4 is the total mass of the current coating solution, U 1 is the viscosity of the current coating solution, U 2 is the viscosity of the target coating solution. Improving the calculation accuracy and detecting and calculating the coating solution in real time can ensure the viscosity standard rate of the coating solution.

[0027] Examples are:

[0028] (1) M 4 = 600 g, U 1 = 1500 mPa·s, U 2 = 1000 mPa·s.

[0029] (2) Sensor feedback: After the PLC collects the parameters, calculate M 3 = 300 g.

[0030] (3) Execution action: The supply module provides a diluting solvent. After being mixed by stirring through the automatic dispensing module, the real-time monitoring and control module verifies the viscosity adjustment result.

[0031] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Description of the Drawings

[0032] The present invention will be further described below with reference to the drawings:

[0033] Figure 1 is a schematic diagram of the automatic dispensing and recycling module of the present invention;

[0034] Figure 2 is a schematic diagram of parameter monitoring;

[0035] Figure 3 is a system flow chart.

Specific Embodiments

[0036] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0037] First, the concepts involved in the present application will be described in conjunction with the accompanying drawings. It should be noted here that the following descriptions of each concept are only for making the content of the present application easier to understand and do not represent a limitation on the protection scope of the present application.

[0038] Embodiment 1:

[0039] In the current market's coating equipment 5, there are usually the following several technical drawbacks in the preparation and recovery of the coating liquid:

[0040] 1. Unstable coating liquid ratio and quality: Traditional coating liquid preparation usually relies on manual operation or fixed ratio, which ignores the real-time changes in the properties of the coating liquid such as concentration and viscosity during the production process. Due to the changes in factors such as the type of substrate, coating speed, and the distance between the coating head and the substrate, the fixed ratio cannot meet the requirements of different production stages, resulting in fluctuations in coating quality. This instability not only affects the coating effect but may also lead to material waste and cost increase.

[0041] 2. Serious waste of coating liquid: The recovery system of the coating liquid in the existing technology has low efficiency, and the waste liquid during the coating process is often directly discharged or stored without effective recycling. Especially during the coating process, due to the changes in the gap between the coating head and the substrate and the uneven spraying of the nozzle, a large amount of coating liquid is often wasted. The discharge of a large amount of waste liquid not only causes economic losses but also increases the cost of waste liquid treatment and burdens the environment.

[0042] 3. High manual operation error: In the traditional coating liquid preparation process, manual operation often brings human errors. Since the ratio, adjustment, and monitoring of the coating liquid mostly rely on manual work, especially during the process of preparing and adjusting the viscosity and concentration of the liquid, non-standard operation or inaccurate control will lead to unstable performance of the coating liquid, thereby affecting the coating quality. This instability is particularly prominent under high-precision production requirements, especially when preparing high-quality coatings.

[0043] 4. Inability to adjust the coating liquid ratio in real time: Most of the dispensing systems of traditional coating equipment 5 lack a real-time feedback mechanism and cannot automatically adjust the ratio according to the usage status of the coating liquid during the production process. For example, changes in factors such as solvent volatilization, temperature, and substrate surface characteristics will affect the performance of the coating liquid. If the concentration and viscosity of the coating liquid cannot be monitored and adjusted in real time, the coating quality will inevitably be affected, and the coating efficiency cannot be maximized.

[0044] 5. Low efficiency of coating liquid recovery and reuse: Existing recovery systems usually use simple recovery tanks or crude filtration systems 302, which cannot effectively remove solid particles or impurities in the waste liquid, nor can they adjust the concentration and viscosity of the coating liquid, resulting in unqualified quality of the recovered liquid. The performance of the recovered liquid may not meet the coating requirements and needs to be re-prepared or discarded, which not only increases resource waste but also raises production costs.

[0045] Therefore, an automatic dispensing and circulating recovery system for coating liquid is proposed. As Figures 1 to 3 shown, it includes a supply module 1, an automatic dispensing module 2, a recovery module 3, and a real-time monitoring and control module 4. The supply module 1 includes a raw material storage system 101, a conveying system 102, and a pre-filtering system 103. The automatic dispensing module 2 includes a proportion adjustment system 201, a viscosity adjustment system 202, and a stirring system 203. The recovery module 3 includes a reflux system 301, a filtering system 302, and a liquid level monitoring system 303. The real-time monitoring and control module 4 includes a sensor group 401, a PLC control system 402, and a human-machine interface 403. It also includes a coating equipment 5. The PLC control system 402 controls the proportion adjustment system 201 and the viscosity adjustment system 202, or the PLC control system 402 controls the viscosity adjustment system 202, and the viscosity adjustment system 202 controls the stirring system 203 to evenly coat the coating liquid on the substrate surface, and then the remaining coating liquid is sequentially recovered into the reflux system 301, the filtering system 302, and the liquid level monitoring system 303. The coating liquid is then sequentially conveyed to the raw material storage system 101, the conveying system 102, and the pre-filtering system 103. The filtered coating liquid finally enters the proportion adjustment system 201. The supply module 1, the automatic dispensing module 2, the recovery module 3, and the real-time monitoring and control module 4 operate in a cycle to adjust the coating liquid.

[0046] Function of the raw material storage system 101: Store the basic raw materials of the coating liquid, including solvents and coating materials. Implementation method: Use corrosion-resistant and highly sealed storage tanks and be equipped with liquid level sensors to monitor the storage volume in real time.

[0047] Function of the conveying system 102: Convey the coating liquid raw materials to the dispensing module through pipelines and pumps. Implementation method: Use variable-speed pumps and flow control valves to ensure stable conveying speed and pressure, and avoid uneven mixing caused by being too fast or too slow.

[0048] Function of the pre-filtering system 103: Remove large-particle impurities preliminarily during the raw material transportation process to avoid damage to the subsequent dispensing system. Implementation method: Install a mesh or membrane filter, which is equipped with an automatic cleaning function to reduce the maintenance workload.

[0049] Automatically supplement raw materials according to the signal of the liquid level sensor; The conveying system 102 adjusts the flow rate according to the demand signal of the dispensing module; The filter can be automatically cleaned after each conveying to ensure the smoothness of the pipeline.

[0050] The PLC control system 402 controls the proportional regulation system 201, the viscosity regulation system 202, the conveying system 102, the coating equipment 5, the reflux system 301, and the human-machine interface 403 simultaneously.

[0051] Function of the proportional regulation system 201: Adjust the ratio of the solvent to the coating material in real time according to the formula. Implementation method: Adopt an electronic proportional valve and a mixing pipeline, and achieve precise dispensing by controlling the opening degree of the proportional valve through the PLC.

[0052] Function of the viscosity regulation system 202: Adjust the viscosity of the coating liquid according to the requirements of the coating process. Implementation method: Control the liquid temperature through a heating or cooling device, and combine with the real-time feedback of the viscosity sensor to dynamically adjust the parameters.

[0053] Function of the stirring system 203: Ensure that the concentration of the mixed coating liquid is the same. Implementation method: Adopt a multi-directional rotating stirrer and an ultrasonic homogenization device to avoid bubble and stratification phenomena.

[0054] The conveying system 102 transports the raw materials to the proportional regulation system 201; The proportional regulation system 201 adjusts the ratio of each raw material according to the PLC instruction; The viscosity regulation system 202 cooperates with the sensor to adjust the viscosity parameter of the mixture; The stirring system 203 performs homogenization treatment on the dispensed liquid to ensure the stability of the coating liquid.

[0055] Function of the reflux system 301: Recover the unconsumed coating liquid from the coating machine to the storage tank. Implementation method: Design with a reflux pump and a one-way valve to ensure the smooth reflux of the coating liquid without backflow.

[0056] Function of the filtering system 302: Remove impurities in the reflux liquid to ensure the quality of the coating liquid for reuse. Implementation method: Adopt multi-stage filtration, including coarse filtration, microfiltration, and fine filtration, and combine with an automatic drain valve to complete the discharge of impurities.

[0057] Function of the liquid level monitoring system 303: Monitor the liquid level status in the reflux system 301 in real time to optimize the recovery process. Implementation method: The liquid level sensor is linked with the PLC, and when the liquid level is lower than the threshold, an alarm or an automatic liquid supplement program is triggered.

[0058] The recycling system receives the remaining coating liquid from the coater; the filtration system 302 removes impurities and then transports the clean coating liquid to the storage tank; the liquid level monitoring system 303 ensures the continuity of the recycling process and prevents overflow.

[0059] Function of the sensor group 401: Collect the concentration, viscosity, temperature, flow rate and pressure parameters of the coating liquid in real time. Implementation method: Install multi-point acquisition sensors, and transmit the data to the control system in real time.

[0060] Function of the PLC control system 402: As the core of the whole system, it coordinates the work among various modules. Implementation method: By writing logic programs, the PLC receives sensor data and outputs control instructions to actuators such as pumps and valves.

[0061] Function of the human-machine interface 403 (HMI): Provide an interaction platform between the operator and the system, display real-time data and allow parameter adjustment. Implementation method: Use a touch screen or an embedded interface, and the operator can intuitively view and modify the working status.

[0062] The sensor group 401 sends real-time data to the PLC; the PLC adjusts key parameters such as the proportional valve and pump speed according to the preset logic; the HMI displays the system status and provides manual operation options.

[0063] The collaborative working methods among the modules are as follows: 1. Startup stage: The operator selects coating process parameters such as formulation concentration and viscosity range through the HMI. After the system starts, the supply module 1 transports raw materials to the blending module;

[0064] 2. Blending stage: The blending module completes the proportion adjustment, viscosity control and homogenization treatment of the coating liquid according to the PLC instructions, and outputs high-quality coating liquid to the coater;

[0065] 3. Coating stage: The coater completes coating under the supervision of the real-time monitoring and control module 4. The PLC adjusts the liquid supply flow rate and pressure in real time to ensure uniform coating;

[0066] 4. Recycling stage: The unused coating liquid flows back to the storage tank through the recycling module 3, and the filtration system 302 removes impurities and then realizes recycling;

[0067] 5. Closed-loop control: The real-time data collected by the real-time monitoring and control module 4 is transmitted to the PLC for analysis. If a deviation is found, the system operating status is automatically adjusted.

[0068] It also includes an execution module. The PLC control system 402 realizes the control of the execution module through data acquisition, real-time analysis, parameter comparison and generation of control instructions. The sensor group 401 includes a concentration sensor, a viscosity sensor, a humidity sensor, a flow rate sensor and a pressure sensor. The execution module includes a proportional valve, a heating and cooling device and a transfer pump.

[0069] The raw material storage system 101 stores the basic raw materials of the coating liquid, including the solvent and the coating material. The conveying system 102 conveys the coating liquid raw materials to the automatic dispensing module 2. The pre-filtering system 103 initially removes large particle impurities during the raw material conveying process to avoid damaging the subsequent dispensing system. The ratio adjustment system 201 adjusts the ratio of the solvent to the coating material in real time according to the formula. The viscosity adjustment system 202 adjusts the viscosity of the coating liquid. The stirring system 203 ensures that the concentration of the mixed coating liquid is the same. The reflux system 301 recovers the unconsumed coating liquid from the coating machine. The filtering system 302 removes impurities in the reflux liquid to ensure the quality of the coating liquid for reuse. The liquid level monitoring system 303 monitors the liquid level state in the reflux system 301 in real time. The sensor group 401 collects the concentration, viscosity, temperature, flow rate, and pressure parameters of the coating liquid in real time.

[0070] An automatic dispensing and recycling method for coating liquid includes:

[0071] S1. The coating liquid raw materials enter the automatic dispensing module 2 through the supply module 1. The sensor group 401 monitors the initial parameters of the coating liquid and makes precise adjustments through controlling the proportional valve and the stirring system 203;

[0072] S2. The dispensed coating liquid enters the coating machine for coating. During the coating process, the real-time monitoring and control module 4 collects data in real time and adjusts the liquid supply flow rate and pressure parameters;

[0073] S3. The unused coating liquid enters the recycling module 3 through the reflux pipeline, and after filtration and detection, it returns to the raw material storage system 101;

[0074] S4. A closed-loop operation is achieved under the coordination of the real-time monitoring and control module 4.

[0075] According to the total mass of the coating liquid and the current solid content collected in real time, the calculation formula for the addition amount is In the formula, M 1 is the mass of the pure solid substance to be added, M 2 is the total mass of the current coating liquid, C 1 is the target solid content, C 2 is the current fixed content. Improving the calculation accuracy and detecting and calculating the coating liquid in real time can ensure the standard rate of the coating liquid content.

[0076] Examples are:

[0077] M 2 = 1000g, C 2 = 40%, C 1 = 50%.

[0078] Sensor feedback: After the PLC collects the initial parameters, calculate M 1= 200 g.

[0079] Execution action: The supply module 1 provides pure solid substances. After being mixed by the automatic dispensing module 2 through the stirring system 203, the real-time monitoring and control module 4 verifies the final result.

[0080] Based on the current viscosity of the coating liquid collected in real time, calculate the mass of the solvent to be added. The formula is In the formula, M 3 is the mass of the solvent to be added, M 4 is the total mass of the current coating liquid, U 1 is the viscosity of the current coating liquid, U 2 is the viscosity of the target coating liquid. Improving the calculation accuracy and detecting and calculating the coating liquid in real time can ensure the viscosity standard rate of the coating liquid.

[0081] Examples are:

[0082] (1) M 4 = 600 g, U 1 = 1500 mPa·s, U 2 = 1000 mPa·s.

[0083] (2) Sensor feedback: After the PLC collects the parameters, calculate M 3 = 300 g.

[0084] (3) Execution action: The supply module 1 provides a diluting solvent. The automatic dispensing module 2 mixes through stirring, and the real-time monitoring and control module 4 verifies the viscosity adjustment result.

[0085] The sensor group 401 sends real-time data to the PLC control system 402. The PLC control system 402 adjusts key parameters such as the proportional valve and pump speed according to the preset logic. The human-machine interface 403 displays the system status and provides manual operation options.

[0086] The closed-loop control method is as follows: 1. Sensor data collection: The real-time monitoring and control module 4 continuously collects parameters of the coating liquid through sensors, such as solid content, viscosity, and flow rate;

[0087] 2. PLC calculates the adjustment amount: Calculate the addition amount of solid substances or solvents according to the formula and generate an execution instruction;

[0088] 3. Execute the adjustment: The automatic dispensing module 2 adjusts the proportional valve and pump speed and accurately adds the calculated substances into the system;

[0089] 4. Feedback correction: After the adjustment is completed, the real-time monitoring and control module 4 collects data again to verify whether the parameters reach the target value. If there is a deviation, the system recalculates and fine-tunes until the requirements are met.

[0090] A computer-readable storage medium stores a computer program thereon, and when the program is executed by a processor, the steps of the above method are implemented.

[0091] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

[0092] Those of ordinary skill in the art can realize that the units (or modules, steps, the same below) of each example described in combination with the embodiments disclosed in this article can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the components of each example have been generally described according to their functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0093] In the embodiments provided by the present invention, it should be understood that the division of units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units can be combined into one unit, one unit can be split into multiple units, or some features can be ignored.

[0094] In addition, the functional units in each embodiment of the present invention can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0095] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device) to execute all or part of the steps of the methods in each embodiment of the present invention. The foregoing storage medium includes: USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs, and various media that can store program codes.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A coating liquid automatic mixing and recycling system, characterized in that: It includes a supply module, an automatic mixing module, a recycling module, and a real-time monitoring and control module. The supply module includes a raw material storage system, a conveying system, and a pre-filtration system. The automatic mixing module includes a ratio adjustment system, a viscosity adjustment system, and a stirring system. The recycling module includes a reflux system, a filtration system, and a liquid level monitoring system. The real-time monitoring and control module includes a sensor group, a PLC control system, and a human-machine interface. It also includes a coating device. The PLC control system controls the ratio adjustment system and the viscosity adjustment system, or the PLC control system controls the viscosity adjustment system. The viscosity adjustment system controls the stirring system to evenly coat the coating liquid on the substrate surface, and then the remaining coating liquid is recycled to the reflux system, the filtration system, and the liquid level monitoring system in turn. The coating liquid is then transported to the raw material storage system, the conveying system, and the pre-filtration system in turn. The filtered coating liquid enters the ratio adjustment system. The supply module, the automatic mixing module, the recycling module, and the real-time monitoring and control module operate in a cycle to adjust the coating liquid.

2. The coating liquid automatic mixing and recycling system and use method as claimed in claim 1, characterized in that: The PLC control system simultaneously controls the ratio adjustment system, the viscosity adjustment system, the conveying system, the coating equipment, the reflux system, and the human-machine interface.

3. The coating liquid automatic mixing and recycling system and method of use as claimed in claim 1, characterized in that: It also includes an execution module. The PLC control system controls the execution module through data acquisition, real-time analysis, parameter comparison, and generation of control instructions. The sensor group includes a concentration sensor, a viscosity sensor, a humidity sensor, a flow rate sensor, and a pressure sensor. The execution module includes a proportional valve, a heating and cooling device, and a delivery pump.

4. The coating liquid automatic mixing and recycling system and use method as claimed in claim 1, characterized in that: The raw material storage system stores the basic raw materials of the coating liquid, including solvents and coating materials. The conveying system conveys the coating liquid raw materials to the automatic mixing module. The pre-filtration system preliminarily removes impurities during the raw material conveying process to avoid damage to the subsequent mixing system. The proportion adjustment system adjusts the ratio of the solvent to the coating material in real time according to the formula. The viscosity adjustment system adjusts the viscosity of the coating liquid. The stirring system ensures that the concentration of the mixed coating liquid is the same. The reflux system recovers the unconsumed coating liquid from the coating machine. The filtration system removes impurities in the reflux liquid to ensure the quality of the coating liquid used again. The liquid level monitoring system monitors the liquid level status in the reflux system in real time. The sensor group collects the parameters of the coating liquid in real time.

5. A method for automatically preparing and recycling a coating liquid, characterized in that: include: S1. The coating liquid raw material enters the automatic mixing module through the supply module, and the sensor group monitors the initial parameters of the coating liquid and makes precise adjustments by controlling the proportional valve and the stirring system; S2. The prepared coating liquid enters the coating machine for coating. During the coating process, the real-time monitoring and control module collects data in real time and adjusts the liquid supply flow rate and pressure parameters; S3. The unused coating liquid enters the recovery module through the reflux pipe and returns to the raw material storage system after filtration and testing; S4. Achieve closed-loop operation under the coordination of real-time monitoring and control modules.

6. The method for automatically dispensing and recycling a coating liquid as claimed in claim 5, characterized in that: According to the total mass of the coating liquid and the current solid content collected in real time, the formula for calculating the addition amount is: Wherein, M1 is the amount of pure solid matter to be added, M2 is the total mass of the current coating liquid, C1 is the target solid content, and C2 is the current fixed content.

7. The method for automatically dispensing and recycling a coating liquid as claimed in claim 5, characterized in that: According to the current viscosity of the coating liquid collected in real time, the mass of solvent to be added is calculated. The formula is: Wherein, M3 is the mass of solvent to be added, M4 is the total mass of the current coating liquid, U1 is the current coating liquid viscosity, and U2 is the target coating liquid viscosity.

8. The coating liquid automatic mixing and recycling system and use method as claimed in claim 5, characterized in that: The sensor group sends real-time data to the PLC control system, and the PLC control system adjusts the key parameters of the proportional valve and pump speed according to the preset logic. The human-machine interface displays the system status and provides manual operation options.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 5 to 8 are implemented.

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