Circuit board etching device with waste liquid grading recovery function

Abstract

A circuit board etching device with a waste liquid grading recycling function comprises an etching device, a filtering device, an electrolysis device, an exchange device and a control panel, the electrolysis device comprises an electrolytic bath, an electrolysis plate and an ionic membrane partition plate, and a driving device is arranged on the electrolysis plate and can drive the electrolysis plate to rotate; the exchange device comprises a tank body and an exchange resin layer arranged in the tank body, a feeding area is arranged at the top of the tank body, a discharging area is arranged at the bottom of the tank body, detectors are arranged on the feeding area and the discharging area, a water inlet is formed in the feeding area, and a water outlet is formed in the discharging area; the control panel is connected to the detector, and a display screen and an alarm device are arranged on the control panel. The etching device provided by the utility model has an on-line recovery function, is high in recovery quality and low in cost, has certain intellectualization and strong practicability, and has strong popularization significance.

Description

Technical Field

[0001] This utility model relates to the field of circuit board etching technology; and in particular to a circuit board etching device with waste liquid graded recycling function. Background Technology

[0002] Circuit boards, also known as printed circuit boards, are important electronic components. As the support structure for electronic components, they serve as the carrier for electrical connections. Circuit boards miniaturize and visualize circuits, playing a crucial role in the mass production of fixed circuits and the optimization of electrical appliance layout. Etching is a method that uses an etching solution to remove copper foil outside the conductive lines. As the etching process progresses, the concentration of copper chloride in the etching solution continuously decreases, while the concentration of cuprous ions continuously increases. The reaction rate between copper chloride and copper gradually slows down, resulting in a decrease in the etching rate. Furthermore, the waste liquid after etching contains a large amount of cuprous ions and acid radicals.

[0003] Therefore, etching solutions need to be regenerated and recycled. Currently, there are various etching solution recycling devices, including dedicated large-scale recycling equipment that collects the etching waste solution for centralized treatment. However, this method involves high equipment, operating costs, and maintenance costs, making it unsuitable for small factories. Some online recycling devices only perform simple filtration, resulting in suboptimal recycling quality and a lack of automation. Utility Model Content

[0004] Therefore, it is necessary to provide a circuit board etching device with waste liquid classification and recycling function to address the shortcomings of the existing technology.

[0005] A circuit board etching device with waste liquid graded recycling function includes an etching device, a filtering device, an electrolysis device, an exchange device, and a control panel. The etching device includes an etching tank, and the etching tank, filtering device, electrolysis device, exchange device, and etching tank are connected sequentially by pipes. The electrolysis device includes an electrolysis tank, an electrolysis plate, and an ion-exchange membrane separator. The electrolysis plate divides the electrolysis tank into a cathode area and an anode area, and the electrolysis plate is disposed in the cathode area. A mounting frame is disposed on the cathode area, and a driving device is disposed on the mounting frame. The electrolysis plate is mounted at the bottom of the driving device, and the driving device drives the electrolysis plate to rotate. The exchange device includes a tank body and an exchange resin layer disposed in the tank body. A feeding area is disposed at the top of the tank body, and a discharging area is disposed at the bottom of the tank body. Detectors are disposed on both the feeding area and the discharging area. The feeding area has a water inlet, and the discharging area has a water outlet. The control panel is connected to the detectors and is equipped with a display screen and an alarm device.

[0006] Furthermore, the filtration device includes a filter box and a filter screen disposed inside the filter box. The filter box has an inlet above the filter screen and an outlet below it. The inlet is connected to the etching tank via a pipe, and the outlet is connected to the electrolysis device via a pipe.

[0007] Furthermore, an installation groove is provided in the middle of the electrolytic cell, the cross-section of the installation groove is U-shaped, and the electrolytic plate is inserted into the installation groove from top to bottom.

[0008] Furthermore, a return pipe is provided outside the anode area, which is connected to the cathode area. The return pipe uses a pump to transport the liquid from the anode area back to the cathode area.

[0009] Furthermore, there are two or more exchange devices. The first exchange device is connected to the electrolysis device, the second exchange device is connected to the first exchange device, and the other exchange devices are connected in sequence.

[0010] Furthermore, the electrolysis device is connected to the first and second exchange devices via pipes, and each pipe is equipped with an electronic valve, which is connected to the control device on the control panel via a signal.

[0011] Furthermore, the second exchange device is also equipped with a second reflux pipe, and the top of the tank of the second exchange device is provided with a liquid inlet. The second reflux pipe is connected to the discharge area and the liquid inlet.

[0012] Furthermore, the etching tank is located on the left side, while the filtration device, electrolysis device, exchange device, and control panel are all located on the right side of the etching tank, and the filtration device, electrolysis device, exchange device, and control panel are arranged sequentially from back to front.

[0013] In summary, this invention achieves online, multi-stage recovery of the etching tank by adding a small online recovery structure around the etching tank, ensuring recovery quality and reducing costs. The layout of each component is reasonable, and the control panel allows for real-time monitoring of liquid information, electrolysis, and exchange efficiency during the recovery process, enabling real-time equipment maintenance and troubleshooting of recovery anomalies. It also allows for intelligent switching of the reflux pipeline to improve the quality of the recovered liquid. Furthermore, the etching device of this invention has a reasonable layout, strong practicality, and significant potential for widespread application. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the first embodiment of the circuit board etching device with waste liquid graded recycling function of this utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the electrolysis unit;

[0016] Figure 3 for Figure 2 Schematic diagram of the middle tank;

[0017] Figure 4 for Figure 1 A flowchart illustrating the process for each part of the process;

[0018] Figure 5 This is a flowchart illustrating the second embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] like Figures 1 to 4 As shown, this utility model provides a circuit board etching device with waste liquid graded recycling function. The circuit board etching device with waste liquid graded recycling function includes an etching device 10, a filtering device 20, an electrolysis device 30, an exchange device 40 and a control panel 50. The etching device includes an etching tank 11. The etching tank 11, the filtering device 20, the electrolysis device 30, the exchange device 40 and the etching tank 11 are connected in sequence through pipes.

[0021] In this embodiment, the etching tank 11 is located on the left side, and the filtration device 20, electrolysis device 30, exchange device 40, and control panel 50 are all located on the right side of the etching tank 11, arranged sequentially from back to front. The filtration device 20 includes a filter box 21 and a filter screen 22 disposed within the filter box 21. The filter box 22 has a liquid inlet area above the filter screen 21 and a filtration area below the filter screen 21. The liquid inlet area has a liquid inlet connected to the etching tank 11 via a pipe and a pump to draw the etching solution from the etching tank 11 into the filter box 21 for preliminary filtration of impurities. An outlet is located on the outer bottom of the filtration area, connected to the electrolysis device 30 via a pipe.

[0022] The electrolysis device 30 includes an electrolytic cell 31, an electrolytic plate 32, and an ion-exchange membrane diaphragm 33. An installation groove (not shown) is provided in the middle of the electrolytic cell 31. The installation groove has a U-shaped cross-section. The electrolytic plate 32 is inserted into the installation groove from top to bottom to divide the electrolytic cell 31 into a cathode region and an anode region. The electrolytic plate 32 is disposed in the cathode region. A mounting frame 311 is provided on the cathode region, and a driving device 312 is provided on the mounting frame 311. The electrolytic plate 32 is mounted at the bottom of the driving device 312, which can drive the electrolytic plate 32 to rotate. In this embodiment, the driving device 312 is a motor. Furthermore, a return pipe 313 is provided outside the anode region and is connected to the cathode region. The return pipe 313 uses a pump to transport the liquid from the anode region back to the cathode region for secondary filtration. During operation, the filtered liquid enters the cathode region of the electrolytic cell 31 from the filter box 21. The liquid then enters the anode region through the ion membrane 33, where the ion membrane 33 filters the copper ions. After conventional electrolysis in the cathode region, the copper ions form metallic copper that is deposited on the electrolytic plate 32.

[0023] The exchange device 40 includes a tank 41, an upper partition, a lower partition, and an exchange resin layer 42 disposed between the upper and lower partitions within the tank 41. The top of the tank 41 has an inlet area 411, and the bottom has an outlet area 412. Detectors 413 are installed on both the inlet and outlet areas 411 and 412. In this embodiment, the detector 413 is an ion concentration detector used for ion concentration detection. During operation, the electrolyzed liquid enters the inlet area 411 from the anode area through a pipe. After ion concentration detection in the inlet area 411, it enters the tank 41. The exchange resin layer 42 adsorbs copper ions from the liquid. The liquid after copper ion adsorption enters the outlet area 412 for secondary detection. The upper and lower detectors 413 can promptly detect changes in ion concentration.

[0024] The control panel 50 is connected to the detector 413. The control panel 50 is equipped with a control device, a display screen, and an alarm device. The detector 413 transmits detected information to the control panel 50. When the changes detected by the upper and lower detectors 413 are small, it indicates a decrease in filtration efficiency. When the efficiency drops below the allowable range, the alarm device sounds an alarm, allowing staff to replace the exchange resin packing in a timely manner to ensure effective adsorption.

[0025] like Figure 5As shown, this is the second embodiment of the present invention. The structure of this embodiment is basically the same as that of the first embodiment, except that there are two or more exchange devices 40. The electrolysis device 30 is connected to both exchange devices 40 through pipes, and each pipe is equipped with an electronic valve. Thus, when the first exchange device 40 needs to replace the exchange resin packing, it can be switched to connect directly to the second exchange device 40. After the replacement is completed, it can be switched back to the first exchange device 40.

[0026] In this embodiment, the second exchange device 40 is also provided with a second reflux pipe 414. The top of the tank 41 of the second exchange device 40 is provided with a liquid inlet, and the second reflux pipe 414 is connected to the discharge area and the liquid inlet. When the detector below the second exchange device 40 detects that the ion concentration still does not reach the required value, the second reflux pipe 414 transports the liquid to the liquid inlet for secondary processing.

[0027] In summary, this invention achieves online, multi-stage recovery of the etching tank by adding a small online recovery structure around the etching tank, ensuring recovery quality and reducing costs. The layout of each component is reasonable, and the control panel allows for real-time monitoring of liquid information, electrolysis and exchange efficiency during the recovery process, enabling real-time equipment maintenance and troubleshooting of recovery anomalies. It also allows for intelligent switching of the reflux pipeline to improve the quality of the recovered liquid. Furthermore, the etching device of this invention has a reasonable layout, strong practicality, and significant potential for widespread application.

[0028] The above-described embodiments only illustrate two implementation methods of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A circuit board etching device with waste liquid classification and recycling function, characterized in that: The device includes an etching apparatus, a filtration apparatus, an electrolysis apparatus, an exchange apparatus, and a control panel. The etching apparatus includes an etching tank, and the etching tank, filtration apparatus, electrolysis apparatus, exchange apparatus, and etching tank are sequentially connected by pipes. The electrolysis apparatus includes an electrolytic cell, an electrolytic plate, and an ion-exchange membrane separator. The electrolytic plate divides the electrolytic cell into a cathode region and an anode region, and the electrolytic plate is disposed in the cathode region. A mounting frame is disposed on the cathode region, and a driving device is disposed on the mounting frame. The electrolytic plate is mounted at the bottom of the driving device, and the driving device drives the electrolytic plate to rotate. The exchange apparatus includes a tank body and an exchange resin layer disposed within the tank body. A feed area is disposed at the top of the tank body, and a discharge area is disposed at the bottom of the tank body. Detectors are disposed on both the feed area and the discharge area. The feed area has a water inlet, and the discharge area has a water outlet. The control panel is connected to the detectors and is equipped with a display screen and an alarm device.

2. The circuit board etching device with waste liquid graded recycling function as described in claim 1, characterized in that: The filtration device includes a filter box and a filter screen disposed inside the filter box. The filter box has an inlet above the filter screen and an outlet below it. The inlet is connected to the etching tank through a pipe, and the outlet is connected to the electrolysis device through a pipe.

3. The circuit board etching device with waste liquid graded recycling function as described in claim 1, characterized in that: An installation groove is provided in the middle of the electrolytic cell. The cross-section of the installation groove is U-shaped, and the electrolytic plate is inserted into the installation groove from top to bottom.

4. The circuit board etching device with waste liquid graded recycling function as described in claim 1, characterized in that: A return pipe is also provided outside the anode area. The return pipe is connected to the cathode area, and the return pipe uses a pump to transport the liquid from the anode area back to the cathode area.

5. The circuit board etching device with waste liquid graded recycling function as described in claim 1, characterized in that: There are two or more exchange devices. The first exchange device is connected to the electrolysis device, the second exchange device is connected to the first exchange device, and the other exchange devices are connected in sequence.

6. The circuit board etching device with waste liquid graded recycling function as described in claim 5, characterized in that: The electrolysis device is connected to the first and second exchange devices via pipelines, and each pipeline is equipped with an electronic valve, which is connected to the control device on the control panel.

7. The circuit board etching device with waste liquid graded recycling function as described in claim 6, characterized in that: The second exchange device is also equipped with a second reflux pipe. The top of the tank of the second exchange device is provided with a liquid inlet. The second reflux pipe is connected to the discharge area and the liquid inlet.

8. The circuit board etching device with waste liquid classification and recycling function as described in claim 1, characterized in that: The etching tank is located on the left side, while the filtration device, electrolysis device, exchange device, and control panel are all located on the right side of the etching tank, and the filtration device, electrolysis device, exchange device, and control panel are arranged in sequence from back to front.

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