A coupling agent automatic control device and control method for copper foil production

Abstract

The invention discloses an automatic control device for a coupling agent for copper foil production, which comprises two sets of coupling agent supply systems arranged in parallel; the two sets of coupling agent supply systems both comprise a material tank, a material tank feed port is connected to a silane coupling agent preparation device, a material discharge port is connected in series with a filter, and a terminal of the filter is connected to a surface treatment machine through a first branch; and a second branch is connected to an X-ray fluorescence analyzer and an aqueous solution copper ion sensor as an analysis element; when the two sets of coupling agent supply systems are working, when one set of coupling agent supply systems is in a working mode, the other set of coupling agent supply systems is in a maintenance and cleaning mode; an automatic control method for a coupling agent for copper foil production based on the device uses an X-ray fluorescence analyzer to control the concentration of a silane coupling agent diluent in a material tank, and uses a combination of an aqueous solution copper ion sensor and a time controller to switch the working modes of the two sets of coupling agent supply systems, so as to realize automatic supply of coupling agent for copper foil production.

Description

Technical Field

[0001] The invention relates to the technical field of copper foil production, and in particular to an automatic control device and a control method for a coupling agent used in copper foil production. Background Art

[0002] Copper foil for electronic circuits is an indispensable and important basic material in the manufacturing process of copper clad laminates and printed circuit boards. Its terminal applications involve consumer electronics, 5G communications, automotive electronics, the Internet of Things, national defense science and technology, aerospace and other fields.

[0003] With the rapid development of the electronic information industry, higher requirements have been placed on the performance of copper foil: the prepreg used in conjunction with copper foil in the field is made of a variety of materials such as resin, reinforcing materials, fillers, etc., and is mostly used after being pressed with copper foil. When pressed with copper foil, the interface compatibility of organic and inorganic substances is poor. Generally, silane coupling agent needs to be sprayed on the pressed surface of copper foil and prepreg to build a "molecular bridge" between the interfaces to connect the two materials with different properties to improve the bonding strength; and the anti-peeling performance, one of the basic properties of copper foil, directly affects the level and stability of the anti-peeling strength after the copper foil and the prepreg are pressed together, thereby directly affecting the quality of copper clad laminate related products. In order to achieve good bonding performance, the spraying amount of silane coupling agent needs to be accurately and stably controlled. Too high a concentration will increase the cost, and white crystals will also be produced, causing defects in the appearance quality of the copper foil; while too low a concentration will cause the anti-peeling strength to fail to meet the standard.

[0004] The existing spraying process of silane coupling agent is mostly based on experience, and the spraying amount cannot be controlled. It usually takes half an hour to add the original solution and water to the silane coupling agent. Not only is the concentration control inaccurate, causing fluctuations in product performance, but the labor intensity of the operators is also high.

[0005] In order to solve the above problems, the prior art also has some optimization processes to control the use of silane coupling agents in the copper foil processing process, such as the patented constant concentration control device and method for surface silanization treatment of electronic circuit copper foil (CN202111669616.4), which mainly solves the problem of precise control of the spraying concentration of the silane coupling agent, but the defect of its technical solution is that it does not involve a solution for cleaning the supply tank, filter and pipeline without stopping the surface treatment machine; and in the actual operation process, the silane coupling agent solution is prone to produce white crystals during use. If the supply tank, filter and pipeline are not cleaned in time, the white crystals will adhere to the rough surface of the copper foil during the spraying process, causing appearance defects, resulting in an unfavorable situation of increased scrap rate. Summary of the invention

[0006] The technical problem solved by the present invention is to provide an automatic control device and control method for a coupling agent for copper foil production. The technical solution can realize automatic control of the concentration of the silane coupling agent and continuous liquid supply operation, and can thoroughly clean the supply tank, filter and pipeline without stopping the surface treatment machine, so as to solve the defects in the above technical background.

[0007] The technical problem solved by the present invention is achieved by adopting the following technical solutions:

[0008] A coupling agent automatic control device for copper foil production, comprising two sets of coupling agent supply systems arranged in parallel; the system composition of the two sets of coupling agent supply systems is consistent, both comprising a material tank, the material tank is provided with a pure water inlet, a sewage outlet, a feed port and a discharge port, the feed port is connected to a silane coupling agent preparation device through a pipeline with a pumping device, the discharge port is connected in series with a filter through a pipeline with a pumping device, the end of the filter is provided with a double branch outlet, the first branch of the double branch outlet is connected to the surface treatment machine as a discharge end, the end of the surface treatment machine is connected to the material tank through a circulation pipeline to form a coupling agent circulation loop; and the second branch is connected to the material tank as a reflux pipeline, and an X-ray fluorescence analyzer and an aqueous solution copper ion sensor are connected to the second branch as analysis elements;

[0009] The X-ray fluorescence analyzer and the pumping device are connected to the DCS system in communication, and are connected to the control end through the DCS system; the aqueous solution copper ion sensor is directly connected to the control end in communication;

[0010] The two coupling agent supply systems are operated selectively during operation. When one coupling agent supply system is in the working mode, the other coupling agent supply system is in the maintenance and cleaning mode. A system switching switch is built into the control end. The switching switch is controlled by a time controller. The working modes of the two coupling agent supply systems are switched by setting a preset value on the time controller.

[0011] As a further limitation, the material tank and the silane coupling agent preparation device are both provided with a continuously operating stirring device, and the material tank is also provided with a liquid level meter for displaying the amount of silane coupling agent in the material tank.

[0012] As a further limitation, the two sets of coupling agent supply systems can be connected to the same X-ray fluorescence analyzer on their respective second branches, or can be provided with separate X-ray fluorescence analyzers.

[0013] As a further limitation, a pressure gauge is provided on the second branch, and a pressure dividing branch is also provided thereon to match it. The pressure dividing branch is connected to the material tank through a reflux pipeline to return the coupling agent liquid under the control of excess feeding pressure back to the material tank.

[0014] As a further limitation, a valve body is provided on the pipeline in the device, and the valve body is a ball valve or a solenoid valve; and when the valve body adopts a solenoid valve, the corresponding solenoid valve is communicatively connected with the DCS system and connected to the control end through the DCS system.

[0015] As a further limitation, the control terminal is a PLC, a PAC, a DCS, a FCS, and a handheld device capable of remote communication.

[0016] As a further limitation, the preset value set on the time controller is 72~168h.

[0017] The present invention also discloses a method for automatically controlling the amount of coupling agent used in copper foil production. The method uses the above-mentioned automatic control device for coupling agent used in copper foil production as an auxiliary device, and specifically includes the following operating steps:

[0018] S1 selects a group of coupling agent supply systems that enter the working mode, adds water and silane coupling agent into the material tank to prepare a silane coupling agent dilution liquid that can be used by the surface treatment machine, and sets the upper and lower limits of the concentration of the silane coupling agent dilution liquid on the control end;

[0019] S2: adding water and silane coupling agent to the silane coupling agent preparation device to prepare a standby silane coupling agent dilution liquid having a concentration greater than that of the available silane coupling agent dilution liquid;

[0020] S3 starts the coupling agent supply system selected in S1, so that the silane coupling agent dilution liquid in the material tank is pumped to the filter for filtration, and the filtered silane coupling agent dilution liquid is sent out through the double branch outlet, one of which is sent to the surface treatment machine for spraying on the rough surface of the copper foil, and the other is sent to the X-ray fluorescence analyzer and the aqueous solution copper ion sensor to monitor the silicon ion concentration and the copper ion concentration in real time. The two silane coupling agent dilution liquids that are treated respectively through the double branch outlets flow back to the material tank through the pipeline to complete the cycle;

[0021] During this process, the device controls the silane coupling agent diluent in the material tank through an X-ray fluorescence analyzer. During this process, the X-ray fluorescence analyzer detects the silicon ion concentration and outputs an electrical signal to the DCS system. The DCS system performs concentration analysis on the silane coupling agent diluent entering the circulation through the control end, and after the silane coupling agent diluent is diluted to the lower limit of the concentration of the silane coupling agent diluent, the silane coupling agent preparation device is used to add the spare silane coupling agent diluent to the material tank, and the concentration of the silane coupling agent diluent is kept within the set range value;

[0022] The working modes of the two coupling agent supply systems are switched by combining the aqueous solution copper ion sensor and the time controller. The switching method in this process is:

[0023] The control terminal reads the values ​​of the aqueous solution copper ion sensor and the time controller respectively, and the built-in comparator of the control terminal compares the values ​​of the two with the preset values ​​of the two in the system:

[0024] A. If the values ​​of the aqueous solution copper ion sensor and the time controller are both less than the system preset values, it is determined that the properties of the silane coupling agent dilution liquid in the coupling agent supply system are normal, and the working mode of the coupling agent supply system is maintained;

[0025] B. If the value of the aqueous solution copper ion sensor is greater than the system preset value but the value of the time controller is less than the system preset value, then further determine the difference between the value of the time controller and the system preset value:

[0026] If the difference is less than 30% of the preset value, it is determined that the properties of the silane coupling agent diluent in the coupling agent supply system have changed, and the coupling agent supply system in the coupling agent supply system enters the maintenance and cleaning mode, while the other coupling agent supply system enters the working mode;

[0027] If the difference is greater than or equal to 30% of the preset value, the system is judged to be faulty and a fault signal is sent to the control terminal;

[0028] C. If the value of the time controller is greater than the system preset value but the value of the aqueous solution copper ion sensor is less than the system preset value, it is determined that the properties of the silane coupling agent diluent in the coupling agent supply system are in a usable state. At this time, the sewage outlet of the material tank in the coupling agent supply system in the working mode is opened to discharge 1 / 3~1 / 2 of the silane coupling agent diluent, and the material tank is supplemented with an equal amount of new coupling agent through the pure water inlet and the silane coupling agent preparation device;

[0029] D. If the values ​​of the aqueous solution copper ion sensor and the time controller are both greater than the system preset values, it is determined that the properties of the silane coupling agent diluent in the coupling agent supply system have changed, and the coupling agent supply system enters the maintenance and cleaning mode, while the other coupling agent supply system enters the working mode;

[0030] S4 Before the two coupling agent supply systems switch the working mode, the silane coupling agent diluent is prepared for the other coupling agent supply system according to the method in step S1, and the working mode is performed after the working mode is switched, and the previous coupling agent supply system enters the maintenance and cleaning mode at the same time; in this mode, the material tank stops supplying liquid, opens the drain valve, drains the solution in the tank, and then adds pure water to flush the material tank, pipeline and filter, completing a working cycle.

[0031] Beneficial effects: The automatic control device and control method of the coupling agent for copper foil production of the present invention obtains the best control mode by collecting the silicon ion concentration and applying the fuzzy control method, and can realize the detection and automatic adjustment of the silane coupling agent solution with the silicon ion concentration required for the production of copper foil. The automatic adjustment has high precision and high reliability. Two sets of liquid supply and liquid return pipelines are configured, and the liquid supply pipeline can be switched without stopping the surface treatment machine, which is convenient for cleaning the supply tank, filter and pipeline, etc., and avoids the appearance defects of the copper foil caused by crystallization.

[0032] By combining the aqueous solution copper ion sensor with the time controller to switch the working modes of the two coupling agent supply systems, automated continuous production can be achieved. On the basis of ensuring the spraying concentration and dosage of the coupling agent, the dosage of the coupling agent can be reduced through automatic control, saving labor and improving the quality stability and production efficiency of copper foil products. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural system diagram of a preferred embodiment of the present invention.

[0034] Among them: 1. Silane coupling agent preparation device; 2. Material tank 1; 3. Material tank 2; 4. Filter 1; 5. Filter 2; 6. X-ray fluorescence analyzer; 7. Surface treatment machine; 8. Metering pump; 9. Centrifugal pump 1; 10. Centrifugal pump 2; 11. Agitator 1; 12. Agitator 2; 13. Agitator 3; 14. Pressure gauge 1; 15. Pressure gauge 2; 16. Pressure gauge 3; 17. Pressure gauge 4; 18. Liquid level gauge 1; 19. Liquid level gauge 2; 20. Ball valve 1; 21. Ball valve 2; 22. Ball valve 16; 23. Ball valve 17; 24. Drain valve 4; 25. Ball valve 4; 26. Ball valve 10; 2 7. Ball valve 14; 28. Ball valve 5; 29. ​​Ball valve 6; 30. Ball valve 3; 31. Ball valve 18; 32. Ball valve 19; 33. Drain valve 5; 34. Ball valve 7; 35. Ball valve 11; 36. Ball valve 15; 37. Ball valve 8; 38. Ball valve 9; 39. Ball valve 12; 40. Ball valve 13; 41. Drain valve 1; 42. Drain valve 2; 43. Drain valve 3; 44. Pipeline 1; 45. Pipeline 2; 46. Pure water pipeline 1; 47. Pure water pipeline 2; 48. Ball valve 20; 49. Solenoid valve 1; 50. Ball valve 21; 51. Solenoid valve 2; 52. Copper ion sensor for aqueous solution. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0036] Unless otherwise defined, the terms used herein have the same meanings as those generally understood by technicians in the technical field to which the present invention belongs. The terms used in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0037] The embodiment of the present invention first provides an automatic control device for silane coupling agent in copper foil production, the device comprising a silane coupling agent preparation device 1 and two sets of coupling agent supply systems, the silane coupling agent replenishing liquid preparation tank 1 is connected to the material tank 1 2 and the material tank 2 3 in the two sets of coupling agent supply systems through respective pipelines, the material tank 1 2 and the material tank 2 3 are connected in parallel, the silane coupling agent preparation device 1 is provided with an agitator 11, the material tank 1 2 is provided with a liquid level gauge 18, the agitator 2 12 and is connected to a pure water pipeline 1 46, the pure water pipeline 1 46 is provided with a ball valve 20 48 and a solenoid valve 1 49, and the material tank 2 3 is provided with a liquid level gauge 2 19, the agitator 3 13 and is connected to a pure water pipeline 2 47, the pure water pipeline 2 47 is provided with a ball valve 21 50 and a solenoid valve 2 51. In addition, a drain valve 1 41 is provided at the bottom of the silane coupling agent preparation device 1 , a drain valve 2 42 is provided at the bottom of the material tank 1 2 , and a drain valve 3 43 is provided at the bottom of the material tank 2 3 .

[0038] The material tank 12 is connected to the inlet of the filter 14 through a pipeline 144, on which a centrifugal pump 19 is provided. The silane material tank 23 is connected to the inlet of the filter 23 through a pipeline 245, on which a centrifugal pump 210 is provided. Ball valves 16 22 and 17 23 are provided at both ends of the centrifugal pump 19 to control the opening and closing of the pipeline at the feed side and the discharge side of the centrifugal pump 19, respectively. Ball valves 18 31 and 19 32 are provided at both ends of the centrifugal pump 210 to control the opening and closing of the pipeline at the feed side and the discharge side of the centrifugal pump 210, respectively. A drain valve 4 24 is provided at the bottom of the filter 14, and a drain valve 5 33 is provided at the bottom of the filter 25.

[0039] The outlet of filter 1 4 and the outlet of filter 2 5 are both double-branch outlets. The connection method of the double-branch outlets of filter 1 4 and filter 2 5 is the same. One branch is connected to the inlet of the surface treatment machine 7 through a pipeline, and the other branch is connected to the X-ray fluorescence analyzer 6 and the aqueous solution copper ion sensor 52 through a pipeline. At the same time, the outlet of the corresponding surface treatment machine 7 on the two branches, and the outlet of the X-ray fluorescence analyzer 6 or the aqueous solution copper ion sensor 52 are respectively connected to the corresponding material tank 1 2 or material tank 2 3 through pipelines.

[0040] A ball valve 20 is provided on the pipeline connecting the silane coupling agent preparation device 1 and the metering pump 8, a ball valve 21 is provided on the pipeline connecting the metering pump 8 and the material tank 2, and a ball valve 30 is provided on the pipeline between the metering pump 8 and the material tank 2 3.

[0041] A pressure gauge 14 is provided on the pipe 1 44 at the inlet of the filter 1 4 , and a pressure gauge 2 15 is provided on the pipe 2 45 at the inlet of the filter 2 5 .

[0042] A ball valve four 25, a ball valve five 28, a ball valve six 29 and a pressure gauge three 16 are provided on the pipeline located at the inlet end of the filter 14 connecting to the surface treatment machine 7; a ball valve seven 34, a ball valve eight 37, a ball valve nine 38 and a pressure gauge four 17 are provided on the pipeline located at the inlet end of the filter 25 connecting to the surface treatment machine 7; a ball valve ten 26 is provided on the pipeline located at the inlet end of the filter 14 connecting to the X-ray fluorescence analyzer; and a ball valve eleven 35 is provided on the pipeline located at the inlet end of the filter 25 connecting to the X-ray fluorescence analyzer.

[0043] A ball valve 12 39 is provided on the pipeline connecting the outlet of the surface treatment machine 7 to the material tank 1 2, a ball valve 13 40 is provided on the pipeline connecting the outlet of the surface treatment machine 7 to the material tank 2 3, a ball valve 14 27 is provided on the pipeline connecting the outlet of the X-ray fluorescence analyzer to the material tank 1 2, and a ball valve 15 36 is provided on the pipeline connecting the outlet of the X-ray fluorescence analyzer to the material tank 2 3.

[0044] X-ray fluorescence analyzer 6, metering pump 8, centrifugal pump 1 9, centrifugal pump 2 10, pressure gauge 3 16, pressure gauge 4 17, level gauge 1 18, pressure gauge 2 19, solenoid valve 1 49 and solenoid valve 2 51 are all connected to the DCS system for communication, and the DCS communication system is connected to the PLC controller; and the aqueous solution copper ion sensor 52 is directly connected to the PLC controller; the PLC controller is used as a control end to automatically control the equipment.

[0045] In this embodiment, the device is used to output silane coupling agent to the surface treatment machine, and the silicon ion concentration in the output silane coupling agent can fall within the range of 300-600ppm. When the device is designed to control the silane coupling agent, it is carried out according to the following steps:

[0046] S1: Open the upper ball valve 20 48 and the solenoid valve 49 of the pure water pipeline 47, add pure water to the material tank 2, and then add the silane coupling agent to prepare a dilute silane coupling agent solution with a silicon ion concentration of 300-600 ppm required for production, and stir for 1 hour using the stirrer 12;

[0047] S2: add pure water to the silane coupling agent preparation device 1, and then add the silane coupling agent, the weight ratio of the silane coupling agent to the pure water is 1:5-1:10, turn on the stirrer 11 and stir for 1 hour to obtain a standby silane coupling agent dilution solution with a silicon ion concentration greater than that of the silane coupling agent dilute solution, after stirring evenly, turn on the metering pump 8 switch, set the DCS system metering pump pulse setting to automatic, and set the silicon ion concentration to a lower limit of 300ppm and an upper limit of 600ppm;

[0048] S3 The silane coupling agent dilution in the material tank 2 is sent to the filter 4 through the centrifugal pump 9 for filtration. The filtered silane coupling agent dilution is divided into two paths. One path is sent to the surface treatment machine 7 for spraying on the rough surface of the copper foil. The other path is connected to the X-ray fluorescence analyzer 6 and the aqueous solution copper ion sensor 52 through the reflux pipeline to monitor the silicon ion concentration and the copper ion concentration in the silane coupling agent solution respectively. The two paths of silane coupling agent dilution are returned to the material tank 2 for recycling.

[0049] During this process, the device controls the silane coupling agent dilution in the material tank 2 through the X-ray fluorescence analyzer 6. During this process, the X-ray fluorescence analyzer 6 detects the silicon ion concentration and outputs an electrical signal to the DCS system. The DCS system performs concentration analysis on the silane coupling agent dilution entering the circulation through the PLC controller, and after the silane coupling agent dilution is diluted to the lower limit of the concentration of the silane coupling agent dilution, the silane coupling agent preparation device 1 is used to add the spare silane coupling agent dilution into the material tank 2, and the concentration of the silane coupling agent dilution is maintained within the set range of 300-600ppm;

[0050] The device simultaneously switches the working modes of the two coupling agent supply systems through the combination of the aqueous solution copper ion sensor 52 and the time controller built into the PLC controller. The switching method in this process is:

[0051] The PLC controller reads the values ​​of the aqueous solution copper ion sensor 52 and the time controller respectively, and the built-in comparator of the PLC controller compares the values ​​of the two with the preset values ​​of the two in the system:

[0052] A. If the values ​​of the aqueous solution copper ion sensor 52 and the time controller are both less than the system preset values, it is determined that the properties of the silane coupling agent dilution solution in the material tank 2 are normal, and the working mode of the coupling agent supply system is maintained;

[0053] B. If the value of the aqueous solution copper ion sensor 52 is greater than the system preset value but the value of the time controller is less than the system preset value, the difference between the value of the time controller and the system preset value is further determined (in this embodiment, the system preset value of the time controller is 100h, that is, after 100h, it is determined that the two sets of coupling agent supply systems should switch the working mode):

[0054] If the difference is less than 30h, it is determined that the properties of the silane coupling agent dilution liquid in tank 2 have changed, and this group of coupling agent supply systems enters the maintenance and cleaning mode, while the other group of coupling agent supply systems enters the working mode;

[0055] If the difference is ≥30h, the system is judged to be faulty and a fault signal is sent to the PLC controller;

[0056] C. If the value of the time controller is greater than the system preset value but the value of the aqueous solution copper ion sensor 52 is less than the system preset value, it is determined that the properties of the silane coupling agent dilution in the material tank 2 are in a usable state. At this time, the drain valve 242 of the material tank 2 in the working mode is opened to discharge 1 / 3 to 1 / 2 of the silane coupling agent dilution, and the material tank 2 is supplemented with an equal amount of new coupling agent through the pure water pipeline 46 and the silane coupling agent preparation device 1;

[0057] D. If the values ​​of the aqueous solution copper ion sensor 52 and the time controller are both greater than the system preset values, it is determined that the properties of the silane coupling agent dilution solution in the material tank 2 have changed, and this group of coupling agent supply systems enters the maintenance and cleaning mode, while the other group of coupling agent supply systems enters the working mode.

[0058] S4 After the properties of the silane coupling agent dilution in the material tank 2 are changed under the conditions of step S3, the same steps as S1 are used to prepare the dilute silane coupling agent solution required for production in the material tank 2 3 of another coupling agent supply system. After the solution is prepared, the liquid supply pipeline is switched, and the material tank 2 3 supplies liquid to the surface treatment machine 7, while the coupling agent supply system corresponding to the material tank 2 stops supplying liquid and enters the maintenance and cleaning mode; in the coupling agent supply system entering the maintenance and cleaning mode, the material tank 2 opens the drain valve 2 42 to drain all the solution in the material tank 2, and then pure water is added through the pure water pipeline 46, and the ball valve 6 29 and the centrifugal pump 9 are opened to circulate and clean the material tank 2, the liquid supply, the liquid return pipeline and the filter 4. After the cleaning is completed, a working cycle is completed and the same is true to realize the automatic silane coupling agent liquid supply.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for automatically controlling the amount of a coupling agent used in copper foil production, the method using an automatic control device for a coupling agent used in copper foil production as an auxiliary device, the automatic control device for a coupling agent used in copper foil production comprising two sets of coupling agent supply systems arranged in parallel; the system composition of the two sets of coupling agent supply systems is consistent, both comprising a material tank, the material tank is provided with a pure water inlet, a sewage outlet, a feed port and a discharge port, the feed port is connected to a silane coupling agent preparation device through a pipeline with a pumping device, the discharge port is connected in series with a filter through a pipeline with a pumping device, the filter end is provided with a double branch outlet, the first branch of the double branch outlet is connected to a surface treatment machine as a discharge end, the end of the surface treatment machine is connected to the material tank through a circulation pipeline to form a coupling agent circulation loop; the second branch is connected to the material tank as a reflux pipeline, and an X-ray fluorescence analyzer and an aqueous solution copper ion sensor are connected to the second branch as analysis elements; The X-ray fluorescence analyzer and the pumping device are connected to the DCS system in communication, and are connected to the control end through the DCS system; the aqueous solution copper ion sensor is directly connected to the control end in communication; The two coupling agent supply systems are operated selectively during operation. When one coupling agent supply system is in the working mode, the other coupling agent supply system is in the maintenance and cleaning mode. The control end is provided with a system switching switch, which is controlled by a time controller. The working modes of the two coupling agent supply systems are switched by setting a preset value on the time controller. It is characterized in that The method specifically includes the following steps: S1 selects a group of coupling agent supply systems that enter the working mode, adds water and silane coupling agent into the material tank to prepare a silane coupling agent dilution liquid that can be used by the surface treatment machine, and sets the upper and lower limits of the concentration of the silane coupling agent dilution liquid on the control end; S2: adding water and silane coupling agent to the silane coupling agent preparation device to prepare a standby silane coupling agent dilution liquid having a concentration greater than that of the available silane coupling agent dilution liquid; S3 starts the coupling agent supply system selected in S1, so that the silane coupling agent dilution liquid in the material tank is pumped to the filter for filtration, and the filtered silane coupling agent dilution liquid is sent out through the double branch outlet, one of which is sent to the surface treatment machine for spraying on the rough surface of the copper foil, and the other is sent to the X-ray fluorescence analyzer and the aqueous solution copper ion sensor to monitor the silicon ion concentration and the copper ion concentration in real time. The two silane coupling agent dilution liquids that are treated respectively through the double branch outlets flow back to the material tank through the pipeline to complete the cycle; During this process, the device controls the silane coupling agent diluent in the material tank through an X-ray fluorescence analyzer. During this process, the X-ray fluorescence analyzer detects the silicon ion concentration and outputs an electrical signal to the DCS system. The DCS system performs concentration analysis on the silane coupling agent diluent entering the circulation through the control end, and after the silane coupling agent diluent is diluted to the lower limit of the concentration of the silane coupling agent diluent, the silane coupling agent preparation device is used to add the spare silane coupling agent diluent to the material tank, and the concentration of the silane coupling agent diluent is kept within the set range value; The working modes of the two coupling agent supply systems are switched by combining the aqueous solution copper ion sensor and the time controller. The switching method in this process is: The control terminal reads the values ​​of the aqueous solution copper ion sensor and the time controller respectively, and the built-in comparator of the control terminal compares the values ​​of the two with the preset values ​​of the two in the system: A. If the values ​​of the aqueous solution copper ion sensor and the time controller are both less than the system preset values, it is determined that the properties of the silane coupling agent dilution liquid in the coupling agent supply system are normal, and the working mode of the coupling agent supply system is maintained; B. If the value of the aqueous solution copper ion sensor is greater than the system preset value but the value of the time controller is less than the system preset value, then further determine the difference between the value of the time controller and the system preset value: If the difference is less than 30% of the preset value, it is determined that the properties of the silane coupling agent diluent in the coupling agent supply system have changed, and the coupling agent supply system in the coupling agent supply system enters a maintenance and cleaning mode, while the other coupling agent supply system enters a working mode; If the difference is greater than or equal to 30% of the preset value, the system is judged to be faulty and a fault signal is sent to the control terminal; C. If the value of the time controller is greater than the system preset value but the value of the aqueous solution copper ion sensor is less than the system preset value, it is determined that the properties of the silane coupling agent diluent in the coupling agent supply system are in a usable state. At this time, the sewage outlet of the material tank in the coupling agent supply system in the working mode is opened to discharge 1 / 3 to 1 / 2 of the silane coupling agent diluent, and the material tank is supplemented with an equal amount of new coupling agent through the pure water inlet and the silane coupling agent preparation device; D. If the values ​​of the aqueous solution copper ion sensor and the time controller are both greater than the system preset values, it is determined that the properties of the silane coupling agent diluent in the coupling agent supply system have changed, and the coupling agent supply system enters the maintenance and cleaning mode, while the other coupling agent supply system enters the working mode; S4 Before the two coupling agent supply systems switch the working mode, the silane coupling agent diluent is prepared for the other coupling agent supply system according to the method in step S1, and the working mode is performed after the working mode is switched, and the previous coupling agent supply system enters the maintenance and cleaning mode at the same time; in this mode, the material tank stops supplying liquid, opens the drain valve, drains the solution in the tank, and then adds pure water to flush the material tank, pipeline and filter, completing a working cycle.

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