Working method for adding and discharging micro-etching cylinder

Abstract

The invention relates to the technical field of circuit board production, in particular to a micro-etching cylinder adding and discharging working method. The liquid level height and the concentration of the micro-etching liquid in the micro-etching cylinder are detected, the concentration of the micro-etching liquid is adjusted according to the concentration detection result of the micro-etching liquid in the micro-etching cylinder, and the liquid level height of the micro-etching liquid is adjusted according to the liquid level height detection result of the micro-etching liquid in the micro-etching cylinder. Then the used waste micro-etching liquid is discharged and collected into a micro-etching transfer cylinder, the waste micro-etching liquid is pumped into an electrolytic copper extraction cylinder for electrolytic copper recovery, the waste micro-etching liquid after copper recovery is pumped into a regeneration cylinder, and after detection and adjustment, the waste micro-etching liquid is pumped into a micro-etching cylinder or a collection cylinder again; according to the system, manual adding is reduced, the time for replacing the inverted cylinder is shortened, the discharged waste micro-etching liquid can be recycled, the cost is reduced, meanwhile, the adding and discharging time is short, the efficiency is high, in addition, energy recycling and reusing can be achieved, and the energy utilization efficiency of the whole system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board production, in particular to a working method for adding and discharging a micro-etching cylinder. Background Art

[0002] Micro-etching of circuit boards is an important part of the production process of circuit boards. The main purpose of micro-etching is to roughen the copper layer on the surface of the circuit board, increase the bonding strength between the copper layer and other materials, and remove oxides and pollutants on the surface of the copper layer to improve the quality and reliability of the circuit board. The micro-etching cylinder mainly uses the principle of chemical corrosion to slightly corrode the surface of the workpiece through a specific chemical solution, remove the oxide layer and impurities on the surface, and perform micro-level roughening treatment, thereby improving the bonding strength and quality of subsequent processing technology.

[0003] There are basically two types of traditional micro-etching tanks: one is to drain all of it and start a new tank; the other is to drain a portion of it and then make a new tank. The drained liquid is directly discharged into the wastewater treatment station. In the entire process of dumping and replacing the tank, labor costs are wasted, and the copper ions are not fully recovered, resulting in waste.

[0004] Based on this, the present invention provides a working method for adding and discharging in a micro-etching cylinder to solve the above-mentioned technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a working method for adding and discharging a micro-etching cylinder. The provided method reduces manual addition and shortens the time for replacing the inverted cylinder. The discharged waste micro-etching liquid can be recycled and reused, which reduces the cost. At the same time, the time for adding and discharging is short and the efficiency is high. In addition, energy recovery and reuse can be achieved, which not only reduces energy waste, but also improves the energy utilization efficiency of the entire system.

[0006] To achieve the above object, the present invention provides the following technical solutions: The present invention provides a working method for adding and discharging a micro-etching cylinder, comprising the following steps: S1. Detect the liquid level and concentration of the micro-etching liquid in the micro-etching cylinder; S2. According to the concentration test result of the micro-etching liquid in the micro-etching cylinder, the concentration of the micro-etching liquid is adjusted; S3, adjusting the liquid level of the micro-etching liquid in the micro-etching cylinder according to the liquid level detection result of the micro-etching liquid in the micro-etching cylinder; S4, discharge and collect the used waste micro-etching liquid into the micro-etching transfer cylinder, and pump the waste micro-etching liquid into the electrolytic copper extraction cylinder to electrolyze and recover copper; S5. The waste micro-etching liquid after copper recovery is pumped into the regeneration tank, and after detection and adjustment, it is pumped back into the micro-etching tank or the collection tank.

[0007] The present invention is further configured as follows: in the step S1, the liquid level height is detected by using a liquid level sensor, and the liquid level sensor is arranged in the micro-etching cylinder.

[0008] The present invention is further configured as follows: in the step S1, the concentration is detected by using a specific gravity tester, and the specific gravity tester is connected to the micro-etching cylinder through a conduit.

[0009] The present invention is further configured as follows: in step S2, the process of adjusting the concentration of the micro-etching solution is as follows: When it is detected that the concentration of the micro-etching liquid in the micro-etching tank is greater than a preset first threshold, tap water is added into the micro-etching tank to reduce the concentration of the micro-etching liquid; When it is detected that the concentration of the micro-etching liquid in the micro-etching tank is less than a second threshold, a mixed reagent is added into the micro-etching tank to increase the concentration of the micro-etching liquid; When it is detected that the concentration of the micro-etching liquid in the micro-etching tank is within the standard range between the first threshold value and the second threshold value, the addition of tap water or the addition of the mixed reagent is stopped.

[0010] The present invention is further configured as follows: in step S3, the process of adjusting the liquid level of the micro-etching liquid is as follows: When the liquid level of the micro-etching liquid is lower than the minimum liquid level threshold, add the micro-etching liquid into the micro-etching cylinder; When the liquid level of the micro-etching liquid is greater than the maximum liquid level threshold, the excess micro-etching liquid is discharged from the overflow port arranged on the micro-etching cylinder.

[0011] The present invention is further configured as follows: in the step S4, the micro-etching transfer cylinder is connected to the specific gravity tester through a pipeline.

[0012] The present invention is further configured as follows: in the step S4, it also includes using a heat exchanger to recover and reuse and store heat from the electrolytic recovered copper.

[0013] The present invention is further configured as follows: in step S5, the regeneration cylinder is connected to the micro-etching cylinder through a pipeline, and the regeneration cylinder is also connected to the collecting cylinder through a pipeline.

[0014] The present invention is further configured as follows: in the step S5, the adjustment is performed by adding an adjustment liquid into the waste micro-etching liquid in the regeneration tank to adjust the waste micro-etching liquid to form a reusable micro-etching liquid.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention detects the liquid level and concentration of the micro-etching liquid in the micro-etching cylinder, and then adjusts the concentration of the micro-etching liquid according to the concentration detection result of the micro-etching liquid in the micro-etching cylinder, and adjusts the liquid level of the micro-etching liquid according to the liquid level detection result of the micro-etching liquid in the micro-etching cylinder, and then discharges and collects the used waste micro-etching liquid into the micro-etching transfer cylinder, and pumps the waste micro-etching liquid into the electrolytic copper extraction cylinder for electrolytic copper recovery. The waste micro-etching liquid after copper recovery is pumped into the regeneration cylinder, and after detection and adjustment, it is pumped into the micro-etching cylinder or the collection cylinder again; the method provided by the present invention reduces manual addition, shortens the time for replacing the inverted cylinder, and the discharged waste micro-etching liquid can be recycled and reused, thereby reducing the cost. At the same time, the time for addition and discharge is short and the efficiency is high. In addition, waste heat recovery can be realized through a heat exchanger, and preheated tap water is used to add to the micro-etching cylinder, or to heat the adjustment liquid in the regeneration cylinder, thereby improving its reaction efficiency, thereby reducing energy waste and improving the energy utilization efficiency of the entire system, and the recovered heat energy can also be stored for powering other low-power devices, thereby reducing the overall energy consumption of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a system diagram of the working system of adding and discharging the micro-etching cylinder of the present invention.

[0017] Description of Figure Numbers: Micro-etching cylinder; 2. Tap water pipe; 3. Mixing agent pipe; 4. Micro-etching transfer cylinder; 5. Electrolytic copper extraction cylinder; 6. Regeneration cylinder; 7. Specific gravity tester; 8. Adjustment liquid pipe; 9. Detection tube; 10. Collection cylinder; 11. Liquid level sensor; 12. Heat exchanger; 13. Thermal energy storage device. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0019] This embodiment provides a working method for adding and discharging a micro-etching cylinder, comprising the following steps: S1. Detect the liquid level and concentration of the micro-etching liquid in the micro-etching cylinder 1.

[0020] The liquid level height is detected by a liquid level sensor 11 , which is disposed in the micro-etching cylinder 1 .

[0021] The concentration is detected by using a specific gravity tester 7, which is connected to the micro-etching cylinder 1 through a conduit.

[0022] In this embodiment, it should be noted that the liquid level sensor 11 is an important device for detecting the change in the liquid level height of the liquid in the container, which is widely used in many industries, and the specific gravity tester 7 is also widely used in many fields, which will not be repeated again. In this embodiment, the liquid level sensor 11 disposed in the micro-etching cylinder 1 is used to measure the liquid level height of the micro-etching liquid in the micro-etching cylinder 1, and the liquid level height is compared with the preset threshold value to determine whether the amount of micro-etching liquid added is within the preset range to ensure that it can meet the use requirements. At the same time, the data obtained by the specific gravity tester 7 is compared with the preset corresponding threshold value to adjust the concentration of the micro-etching liquid.

[0023] S2. According to the concentration detection result of the micro-etching liquid in the micro-etching cylinder 1, the concentration of the micro-etching liquid is adjusted.

[0024] The process of adjusting the concentration of the micro-etching solution is as follows: When it is detected that the concentration of the micro-etching liquid in the micro-etching tank 1 is greater than a preset first threshold, tap water is added into the micro-etching tank 1 to reduce the concentration of the micro-etching liquid; When it is detected that the concentration of the micro-etching liquid in the micro-etching tank 1 is less than the second threshold, a mixed reagent is added into the micro-etching tank 1 to increase the concentration of the micro-etching liquid; When it is detected that the concentration of the micro-etching liquid in the micro-etching tank 1 is within the standard range between the first threshold value and the second threshold value, the addition of tap water or the addition of the mixed reagent is stopped.

[0025] In this embodiment, it should be noted that the mixed reagent includes but is not limited to sulfuric acid and sodium persulfate.

[0026] S3. According to the detection result of the liquid level of the micro-etching liquid in the micro-etching cylinder 1, the liquid level of the micro-etching liquid is adjusted.

[0027] The process of adjusting the liquid level of the micro-etching liquid is as follows: When the liquid level of the micro-etching liquid is less than the minimum liquid level threshold, add the micro-etching liquid into the micro-etching cylinder 1; When the liquid level of the micro-etching liquid is greater than the maximum liquid level threshold, the excess micro-etching liquid is discharged from the overflow port provided on the micro-etching cylinder 1 .

[0028] In this embodiment, it should be noted that a control valve may be provided at the overflow port. By opening the control valve, the excess micro-etching liquid can flow into the micro-etching transfer cylinder 4 through the overflow port, thereby realizing the recycling of the excess micro-etching liquid.

[0029] S4, discharge and collect the used waste micro-etching liquid into the micro-etching transfer cylinder 4, and pump the waste micro-etching liquid into the electrolytic copper extraction cylinder 5 to electrolyze and recover copper.

[0030] The micro-etching transfer cylinder 4 is connected to the specific gravity tester 7 through a pipeline.

[0031] It also includes using a heat exchanger 12 to recover, reuse and store heat from electrolytically recovered copper.

[0032] In this embodiment, it should be noted that the specific gravity tester 7 can monitor the liquid concentration of the micro-etching cylinder 1 in real time. The specific gravity tester 7 can use a pipeline to send the detected micro-etching liquid into the micro-etching transfer cylinder 4 to achieve the recycling of the micro-etching liquid.

[0033] At the same time, the heat of copper recovered by electrolysis is recovered through the heat exchanger 12, and tap water is preheated for adding to the micro-etching cylinder 1, or for heating the adjustment liquid in the regeneration cylinder 6, so as to improve its reaction efficiency, which not only reduces energy waste but also improves the energy utilization efficiency of the entire system. In addition, the thermal energy storage device 13 can be used to store the recovered thermal energy for powering other low-power equipment, thereby reducing the overall energy consumption of the system.

[0034] S5. The waste micro-etching liquid after copper recovery is pumped into the regeneration tank 6. After detection and adjustment, it is pumped into the micro-etching tank 1 or the collection tank 10 again.

[0035] The regeneration cylinder 6 is connected to the micro-etching cylinder 1 through a pipeline, and the regeneration cylinder 6 is also connected to the collecting cylinder 10 through a pipeline.

[0036] Furthermore, the adjustment is performed by adding an adjustment liquid into the waste micro-etching liquid in the regeneration tank 6 to adjust the waste micro-etching liquid to form a reusable micro-etching liquid.

[0037] In this embodiment, it should be noted that the waste micro-etching liquid can be converted into a reusable micro-etching liquid for production. The adjustment liquid includes but is not limited to sulfuric acid, hydrogen peroxide, etc., which can be selected according to the needs. Example

[0038] like Figure 1 As shown, this embodiment provides a micro-etching cylinder adding and discharging working system, which is used to implement the working method provided in Example 1. The system is specifically as follows: The micro-etching cylinder 1 includes a water pipe 2 and a mixed reagent pipe 3 installed at the inlet end thereof, wherein when it is detected that the concentration of the micro-etching liquid in the micro-etching cylinder 1 is greater than a preset first threshold value, tap water is added into the micro-etching cylinder 1 through the water pipe 2 to reduce the concentration of the micro-etching liquid; when it is detected that the concentration of the micro-etching liquid in the micro-etching cylinder 1 is less than a second threshold value, a mixed reagent is added into the micro-etching cylinder 1 through the mixed reagent pipe 3 to increase the concentration of the micro-etching liquid. As an implementation method of this embodiment, the mixed reagent is composed of sulfuric acid and sodium persulfate, and it should be noted that control valves can be installed on both the water pipe 2 and the mixed reagent pipe 3 to control the pumping of tap water or mixed reagent.

[0039] A liquid level sensor 11 is arranged on the inner wall of the micro-etching cylinder 1 for detecting the liquid level of the micro-etching liquid in real time, and an overflow port is opened on the micro-etching cylinder 1, and the overflow port pipeline is connected with the micro-etching transfer cylinder 4. When the liquid level sensor 11 detects that the liquid level of the micro-etching liquid is less than the minimum liquid level threshold, the micro-etching liquid can be added to the micro-etching cylinder 1. When the liquid level sensor 11 detects that the liquid level of the micro-etching liquid is greater than the maximum liquid level threshold, the overflow port can be opened to pump the excess micro-etching liquid into the micro-etching transfer cylinder 4 to ensure that the liquid level of the micro-etching liquid meets the use requirements.

[0040] The micro-etching cylinder 1 is connected to the micro-etching transfer cylinder 4 through a pipeline, and the used waste micro-etching liquid will be pumped into the micro-etching transfer cylinder 4 through the pipeline. The micro-etching transfer cylinder 4 is connected to the electrolytic copper extraction cylinder 5 through a pipeline, and the electrolytic copper extraction cylinder 5 is connected to the regeneration cylinder 6 through a pipeline. The waste micro-etching liquid will be pumped into the electrolytic copper extraction cylinder 5, and electrolytic copper recovery will be carried out in the electrolytic copper extraction cylinder 5. The waste micro-etching liquid after electrolysis will be pumped into the regeneration cylinder 6. The regeneration cylinder 6 is provided with an adjustment liquid pipe 8, a detection tube 9 and a collection cylinder 10. The regeneration cylinder 6 is also connected to the micro-etching cylinder 1 through a pipeline. The waste micro-etching liquid in the regeneration cylinder 6 is obtained through the detection tube 9. After detection, the adjustment liquid pipe 8 is used to add the adjustment liquid to the regeneration cylinder 6, so that the waste micro-etching liquid forms a usable The micro-etching liquid can be recycled and reused and then pumped back into the micro-etching cylinder 1, realizing the recycling of the micro-etching liquid. At the same time, the micro-etching liquid can also be pumped into the collection cylinder 10 for storage. The electrolytic copper extraction cylinder 5 is connected to the heat exchanger 12 through a pipeline, and the heat exchanger 12 is respectively connected to the micro-etching cylinder 1 and the regeneration cylinder 6 through a water pipe. It can preheat tap water for adding to the micro-etching cylinder 1, or heat the adjustment liquid in the regeneration cylinder 6 to improve its reaction efficiency, which not only reduces energy waste, but also improves the energy utilization efficiency of the entire system. The heat exchanger is also connected to a thermal energy storage device 13 to store the recovered heat energy for powering other low-power equipment, thereby reducing the overall energy consumption of the system. In addition, it should be noted that corresponding valves can also be set on each pipeline, which will not be repeated here.

[0041] The present invention detects the liquid level and concentration of the micro-etching liquid in the micro-etching cylinder, and then adjusts the concentration of the micro-etching liquid according to the concentration detection result of the micro-etching liquid in the micro-etching cylinder, and adjusts the liquid level of the micro-etching liquid according to the liquid level detection result of the micro-etching liquid in the micro-etching cylinder, and then discharges and collects the used waste micro-etching liquid into the micro-etching transfer cylinder, and pumps the waste micro-etching liquid into the electrolytic copper extraction cylinder for electrolytic copper recovery. The waste micro-etching liquid after copper recovery is pumped into the regeneration cylinder, and after detection and adjustment, it is pumped into the micro-etching cylinder or the collection cylinder again; the method provided by the present invention reduces manual addition, shortens the time for replacing the inverted cylinder, and the discharged waste micro-etching liquid can be recycled and reused, thereby reducing the cost. At the same time, the time for addition and discharge is short and the efficiency is high. In addition, waste heat recovery can be realized through a heat exchanger, and preheated tap water is used to add to the micro-etching cylinder, or to heat the adjustment liquid in the regeneration cylinder, thereby improving its reaction efficiency, thereby reducing energy waste and improving the energy utilization efficiency of the entire system, and the recovered heat energy can also be stored for powering other low-power devices, thereby reducing the overall energy consumption of the system.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A working method for adding and discharging a micro-etching cylinder, characterized in that: The following steps are involved: S1. Detect the liquid level and concentration of the micro-etching liquid in the micro-etching cylinder; S2. According to the concentration test result of the micro-etching liquid in the micro-etching cylinder, the concentration of the micro-etching liquid is adjusted; S3, adjusting the liquid level of the micro-etching liquid in the micro-etching cylinder according to the liquid level detection result of the micro-etching liquid in the micro-etching cylinder; S4, discharge and collect the used waste micro-etching liquid into the micro-etching transfer cylinder, and pump the waste micro-etching liquid into the electrolytic copper extraction cylinder to electrolyze and recover copper; S5. The waste micro-etching liquid after copper recovery is pumped into the regeneration tank, and after detection and adjustment, it is pumped back into the micro-etching tank or the collection tank.

2. A method for adding and discharging a micro-etching cylinder according to claim 1, characterized in that: In the step S1, the liquid level height is detected by a liquid level sensor, and the liquid level sensor is arranged in the micro-etching cylinder.

3. A working method for adding and discharging a micro-etching cylinder according to claim 1, characterized in that: In the step S1, the concentration is detected by using a specific gravity tester, and the specific gravity tester is connected to the micro-etching cylinder through a conduit.

4. A working method for adding and discharging a micro-etching cylinder according to claim 1, characterized in that: In step S2, the process of adjusting the concentration of the micro-etching solution is as follows: When it is detected that the concentration of the micro-etching liquid in the micro-etching tank is greater than a preset first threshold, tap water is added into the micro-etching tank to reduce the concentration of the micro-etching liquid; When it is detected that the concentration of the micro-etching liquid in the micro-etching tank is less than a second threshold, a mixed reagent is added into the micro-etching tank to increase the concentration of the micro-etching liquid; When it is detected that the concentration of the micro-etching liquid in the micro-etching tank is within the standard range between the first threshold value and the second threshold value, the addition of tap water or the addition of the mixed reagent is stopped.

5. A working method for adding and discharging a micro-etching cylinder according to claim 1, characterized in that: In step S3, the process of adjusting the liquid level of the micro-etching liquid is as follows: When the liquid level of the micro-etching liquid is lower than the minimum liquid level threshold, add the micro-etching liquid into the micro-etching cylinder; When the liquid level of the micro-etching liquid is greater than the maximum liquid level threshold, the excess micro-etching liquid is discharged from the overflow port arranged on the micro-etching cylinder.

6. A working method for adding and discharging a micro-etching cylinder according to claim 1, characterized in that: In the step S4, the micro-etching transfer cylinder is connected to a specific gravity tester through a pipeline.

7. A working method for adding and discharging a micro-etching cylinder according to claim 1, characterized in that: In the step S4, a heat exchanger is also used to recover and store heat from the electrolytically recovered copper.

8. A working method for adding and discharging a micro-etching cylinder according to claim 1, characterized in that: In the step S5, the regeneration cylinder is connected to the micro-etching cylinder through a pipeline, and the regeneration cylinder is also connected to the collection cylinder through a pipeline.

9. A working method for adding and discharging a micro-etching cylinder according to claim 1, characterized in that: In the step S5, the adjustment is performed by adding an adjustment liquid into the waste micro-etching liquid in the regeneration tank to adjust the waste micro-etching liquid to form a reusable micro-etching liquid.

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