A stripping tank and a stripping device thereof

Abstract

The utility model provides a kind of stripping tank and its stripping device, belong to diamond wire recycling technical field, the stripping tank includes tank body, power supply, anode assembly and cathode assembly, tank body inside contains stripping solution;Power supply is located the outside of the tank body;Anode assembly is located the both ends of the tank body;Cathode assembly connects the negative pole of power supply, and is immersed in the stripping solution;Wherein, the anode assembly includes main roller and electrically conductive rod, the main roller is located the both ends of the tank body, the main roller connects the positive pole of power supply, the electrically conductive rod is arranged on the main roller surface, diamond wire is wound on the main roller of the both ends of the tank body and contacts with the electrically conductive rod, and the diamond wire is immersed in the stripping solution.The utility model solves the problem that existing stripping device pollutes greatly and is prone to incomplete stripping or overcorrosion diamond wire.

Description

Technical Field

[0001] This utility model relates to the field of diamond wire recycling technology, and in particular to a stripping tank and its stripping device. Background Technology

[0002] With the rapid development of the photovoltaic industry, the raw material for diamond wire has gradually transitioned from carbon steel busbars to tungsten wire busbars. It is projected that by the end of 2025, tungsten wire will completely replace carbon steel wire as the mainstay of the photovoltaic industry. Due to its excellent ductility, tungsten wire busbars can be drawn to approximately 2µm, far thinner than the 36µm maximum drawing diameter of carbon steel busbars. Finer diamond wire allows silicon wafer cutting manufacturers to cut more silicon wafers. Given the high proportion of silicon material procurement costs, this effectively reduces silicon consumption per wafer, lowers the total silicon material demand, and saves on silicon material costs.

[0003] However, the cost of tungsten wire busbars is 5-10 times that of carbon steel busbars, and the cost of busbars accounts for approximately 60-70% of the production cost of diamond wire. During the production process, substandard tungsten wire diamond wire products are generated. Directly discarding these products would result in significant waste of busbars and increase production costs. Therefore, stripping the plating from substandard diamond wires to restore them to unplated busbars and reusing them in production has significant economic value.

[0004] Existing stripping processes typically employ chemical stripping, which involves dissolving the plating layer through a chemical reaction between chemical reagents and the plating. This method suffers from several drawbacks, including difficulty in controlling the reaction rate, incomplete stripping, or excessive corrosion of tungsten wire busbars, polyester busbars, and other diamond wire busbars. Furthermore, the addition of chemical reagents can cause pollution.

[0005] In view of this, the present invention provides a new solution to the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a stripping tank and its stripping device, which solves the problems of existing stripping devices having high pollution levels and being prone to incomplete stripping or excessive corrosion of diamond wire.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution.

[0008] A stripping tank, comprising:

[0009] The tank contains a stripping solution.

[0010] The power supply is located outside the tank.

[0011] Anode components are located at both ends of the tank.

[0012] The cathode assembly is connected to the negative terminal of the power supply and is immersed in the stripping solution;

[0013] The anode assembly includes a main roller and a conductive rod. The main roller is located at both ends of the tank and is connected to the positive terminal of the power supply. The conductive rod is disposed on the surface of the main roller. A diamond wire is wound around the main roller and in contact with the conductive rod. The diamond wire is immersed in the stripping solution.

[0014] A further preferred embodiment includes a driving assembly for driving the main rollers at both ends of the tank to rotate synchronously, so that the diamond wire moves from one end of the tank to the other, and the diamond wire is immersed in the stripping solution during the movement.

[0015] A further preferred embodiment is that the driving component is a motor, and the output shaft of the motor is fixed to the main roller.

[0016] A further preferred embodiment is that the cathode assembly is made of titanium alloy, graphite, or stainless steel.

[0017] A further preferred embodiment is that the cathode assembly is a titanium frame or titanium basket, and the cathode assembly is located below the diamond wire and spaced 50-100cm apart from the diamond wire.

[0018] A further preferred embodiment is that 3-10 conductive rods are evenly distributed on the surface of each main roller, and the length direction of the conductive rods is consistent with the axial direction of the main roller.

[0019] A further preferred embodiment is that the surface of the main roller is provided with a groove for accommodating the conductive rod, the conductive rod being engaged with the groove, or the conductive rod being placed in the groove and fixed with adhesive tape.

[0020] A further preferred embodiment is that the power supply is a 12V / 100A DC power supply, set to constant current mode, with a current value of 50-90A and a running speed of 20-100m / min.

[0021] A further preferred embodiment is that the diamond wire busbar is a tungsten wire busbar or a polyester busbar.

[0022] A stripping device includes a stripping tank, an unwinding bin, a first water washing tank, an alkaline washing tank, a second water washing tank, an oven, and a winding bin, wherein the unwinding bin, the first water washing tank, the stripping tank, the alkaline washing tank, the second water washing tank, the oven, and the winding bin are arranged sequentially.

[0023] In summary, this utility model has the following beneficial effects:

[0024] The stripping tank of this utility model includes a tank body, a power supply, an anode assembly, and a cathode assembly. The tank body contains a stripping solution. The power supply is located outside the tank body. The anode assembly is located at both ends of the tank body. The cathode assembly is connected to the negative terminal of the power supply and is immersed in the stripping solution. The anode assembly includes a main roller and a conductive rod. The main roller is located at both ends of the tank body and is connected to the positive terminal of the power supply. The conductive rod is disposed on the surface of the main roller. Diamond wire is wound around the main roller at both ends of the tank body and contacts the conductive rod. The diamond wire is immersed in the stripping solution.

[0025] This invention employs an electrolytic stripping method, using a power source to drive a redox reaction between the anode (diamond wire) and the cathode assembly: at the anode, the nickel plating dissolves (Ni - 2e- → Ni). 2 +), nickel ions are reduced and deposited at the cathode (Ni). 2 (++2e-→Ni). The main roller, serving as the support and transmission component for the diamond wire, provides the moving power for the diamond wire through its own rotation, enabling the diamond wire to move continuously from one end of the tank to the other, achieving continuous stripping. The main roller is directly connected to the positive terminal of the power supply, serving as a crucial intermediate hub for current conduction from the power source to the diamond wire. The current is transmitted through the main roller to the conductive rod on the surface, and then through the conductive rod to the diamond wire, making the diamond wire the anode of the electrolytic reaction and providing the necessary electric field conditions for the oxidation and dissolution of the nickel plating. The entire process requires no continuous addition of chemical reagents; the reaction can be maintained solely through the circulation of the stripping solution. Furthermore, metallic nickel can be directly recovered from the cathode, significantly reducing the heavy metal content in the waste liquid and lowering pollutant emissions and treatment costs. Simultaneously, the power supply parameters or modes can be adjusted to ensure a uniform and stable current density through the diamond wire, avoiding excessive corrosion of the busbar due to excessive local current or plating residue due to insufficient current. This solves the problems of high pollution and incomplete stripping or excessive corrosion of the diamond wire in existing stripping devices. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a top view of a preferred embodiment of the plating stripping tank in this utility model;

[0028] Figure 2 This is a cross-sectional view of a preferred embodiment of the plating stripping tank in this utility model;

[0029] Figure 3This is a cross-sectional view of the main roller structure of a preferred embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of a preferred embodiment of the plating stripping device in this utility model;

[0031] Figure 5 This is an electron microscope image of a tungsten wire diamond wire before stripping in a preferred embodiment of this utility model;

[0032] Figure 6 This is an electron microscope image of a tungsten wire diamond wire after stripping plating, according to a preferred embodiment of this utility model.

[0033] In the diagram, 1. Unwinding bin; 2. First washing tank; 3. Stripping tank; 31. Tank body; 321. Main roller; 322. Conductive rod; 323. Drive assembly; 324. Conveyor belt; 33. Cathode assembly; 34. Stripping solution; 35. Diamond wire; 36. Baffle plate; 37. Electrolytic cell; 38. Storage tank; 4. Alkali washing tank; 5. Second washing tank; 6. Oven; 7. Rewinding bin. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] During the production of diamond wire, defective diamond wire products are generated. Directly discarding these products would result in a significant waste of the main wire and increase production costs. Therefore, stripping the plating from defective diamond wire to restore it to unplated main wire and reusing it in production has significant economic value.

[0036] Existing stripping processes typically employ chemical stripping, which involves dissolving the plating layer through a chemical reaction between chemical reagents and the plating. This method suffers from several drawbacks, including difficulty in controlling the reaction rate, incomplete stripping, or excessive corrosion of tungsten wire busbars, polyester busbars, and other diamond wire busbars. Furthermore, the addition of chemical reagents can cause pollution.

[0037] To address the problems of high pollution and incomplete or excessive corrosion of diamond wire in existing stripping devices, this invention provides a novel stripping tank and device. Compared to traditional chemical stripping, this invention employs electrolytic stripping, precisely controlling the reaction process with current for more uniform and thorough stripping. It also prevents corrosion of the diamond wire mainframe, and the recovered diamond wire mainframe exhibits stable performance and can be directly reused. The electrolytic reaction rate is fast, resulting in higher stripping efficiency than chemical stripping. Furthermore, the wire travel speed and current parameters can be flexibly adjusted to meet the stripping requirements of different plating thicknesses.

[0038] Example: A stripping tank and its stripping device, such as Figure 1 , 2As shown, the stripping tank 3 includes a tank body 31, a power supply, an anode assembly, and a cathode assembly 33. The tank body 31 is a rectangular frame structure with an open top, and the stripping solution 34 is contained inside the tank body 31. The power supply is located outside the tank body 31 and uses a 12V / 100A DC power supply (or other compatible DC power supply). The anode assembly is located outside both ends of the tank body 31 and includes a main roller 321 and a conductive rod 322. The main roller 321 is located at both ends of the tank body 31 and is made of conductive material, serving both conductive and transmission functions. The main roller 321 is connected to the positive terminal of the power supply. When the diamond wire 35 to be stripped is driven through the main roller 321, it forms the anode of the electrolytic circuit, ensuring stable conductivity of the wire. The conductive rod 322 is disposed on the surface of the main roller 321 and is used for current conduction. The diamond wire 35 is wound around the main roller 321 at both ends of the tank body 31 and maintains sliding contact with the conductive rod 322. The diamond wire 35 is immersed in the stripping solution 34. The conductive rod 322 is in direct contact with the diamond wire 35, which enhances conductivity and ensures uniform distribution of electrolytic current. It also prevents damage to the main roller 321 caused by direct friction between the wire and the main roller, thus extending the equipment's lifespan. The cathode assembly 33 is connected to the negative terminal of the power supply and is immersed in the stripping solution 34.

[0039] In the above technical solution, the main roller 321 is connected to the positive terminal of the power supply to form the anode, and the cathode assembly 33 is connected to the negative terminal of the power supply and immersed in the stripping solution 34. The diamond wire 35 is wound around the main roller 321 and contacts the conductive rod 322 to form a complete electrolytic circuit, ensuring that the electrolytic reaction proceeds uniformly and stably. This efficiently removes the coating and adhering diamond grit from the surface of the diamond wire 35, significantly improving the thoroughness of the stripping process. The conductive rod 322 directly contacts the diamond wire 35 to achieve conductivity. Combined with the selective dissolution characteristics of the stripping solution 34 (e.g., tungsten wire does not react with the stripping solution 34), the coating can be precisely removed without damaging the diamond wire 35 substrate, ensuring that the recovered diamond wire 35 has intact performance and can be directly reused in production. The main roller 321 has both transmission and conductivity functions. The conductive rod 322 is set on the surface of the main roller 321 and contacts the diamond wire 35. This not only enhances the uniformity of current conduction and avoids damage to the wire caused by excessive local current, but also ensures that the diamond wire 35 is stably immersed in the stripping solution 34 through the support and transmission of the main roller 321, thereby improving the continuity and stability of the stripping process.

[0040] The main roller 321, serving as both a support and transmission component for the diamond wire 35, provides the moving power for the diamond wire 35 through its own rotation, enabling the diamond wire 35 to move continuously from one end of the tank 31 to the other, thus achieving continuous stripping. The main roller 321 is directly connected to the positive terminal of the power supply, serving as a crucial intermediate hub for current conduction from the power source to the diamond wire 35. Current is transmitted through the main roller 321 to the conductive rod 322 on the surface, and then further conducted to the diamond wire 35, making the diamond wire 35 the anode of the electrolytic reaction and providing the necessary electric field conditions for the oxidation and dissolution of the nickel plating layer. The main roller 321, acting as a dual carrier of "transmission + conduction," provides the power and current foundation for the entire stripping process; the conductive rod 322, as a key component of "current distribution + roller protection," optimizes the current distribution and protects the main roller 321. The two work together to form a synergistic mechanism of "stable transmission → uniform conductivity → high-efficiency electrolysis", which not only ensures the continuous movement and full immersion of the diamond wire 35, but also achieves uniform and thorough peeling of the coating, while protecting the main roller 321 and the tungsten wire busbar.

[0041] This invention employs an electrolytic stripping method, using a power source to drive a redox reaction between the anode (diamond wire 35) and the cathode assembly 33: at the anode, the nickel plating dissolves (Ni - 2e- → Ni). 2 +), nickel ions are reduced and deposited at the cathode (Ni). 2 (++2e-→Ni). The entire process requires no continuous addition of chemical reagents; the reaction can be maintained simply by circulating the stripping solution 34. Furthermore, metallic nickel can be directly recovered from the cathode, significantly reducing the heavy metal content in the waste liquid and lowering pollutant emissions and treatment costs. Simultaneously, power parameters or modes can be adjusted to ensure a uniform and stable current density through the diamond wire 35, avoiding excessive corrosion of the busbar due to excessive local current or plating residue due to insufficient current.

[0042] Preferably, the power supply is set to constant current mode, with a current value of 50-90A and a running speed of 20-100m / min. In constant current mode, the power supply output current is stable, ensuring that the current density passing through the diamond wire 35 (anode) is uniform.

[0043] Preferably, the stripping solution is a combination of two mixed acids, and can be selected from any combination of hydrochloric acid and sulfamic acid, nitric acid and sulfamic acid, nitric acid and oxalic acid, hydrochloric acid and sulfuric acid, and hydrochloric acid and oxalic acid. When using the combination of hydrochloric acid and sulfamic acid, it is prepared by mixing 3-10 ml / L of industrial hydrochloric acid, 3-10 ml / L of sulfamic acid, and 600 L of pure water. This can promote the electrolytic dissolution of the nickel plating through hydrogen ions, while avoiding corrosion of the busbar.

[0044] It should be noted that the busbar that can be stripped of plating in this invention is a busbar that cannot undergo an electrolytic reaction with the stripping solution 34. Therefore, the diamond wire 35 busbar is preferably a tungsten wire busbar or a polyester busbar. In this embodiment, the diamond wire 35 is a tungsten wire diamond wire with a plating layer and diamond grit on its surface.

[0045] Preferably, the tank body 31 is internally provided with an electrolytic cell 37 and storage tanks 38 located at both ends of the electrolytic cell 37. The electrolytic cell 37 and the storage tanks 38 are separated by a partition 36. The partition 36 has slots for diamond wire 35 to pass through, and the diamond wire 35 passes through the side wall of the tank body 31 and the slots. The electrolytic cell 37 is filled with stripping solution 34. The level of the stripping solution 34 in the electrolytic cell 37 is higher than that in the slots, so that the stripping solution 34 in the electrolytic cell 37 can overflow into the storage tank 38 through the slots, forming a level difference where the level of the stripping solution 34 in the storage tank 38 is lower than that in the electrolytic cell 37. A pump body is provided outside the tank body 31. The input end of the pump body is connected to the storage tank 38, and the output end is connected to the electrolytic cell 37. It is used to pump the stripping solution 34 in the storage tank 38 back to the electrolytic cell 37, forming a circulation loop for the stripping solution 34.

[0046] In the above technical solution, the stripping solution 34 in the electrolytic cell 37 overflows into the storage tank 38 through the tank openings, and is then pumped back into the electrolytic cell 37, forming a continuous dynamic flow. This circulation effectively avoids the problem of uneven concentration of the stripping solution 34 caused by local electrolytic reactions (such as anodic nickel dissolution and cathode nickel deposition). 2 (If the concentration is too high or the acid concentration drops too quickly), ensure that the composition and concentration of the stripping solution 34 are consistent throughout the electrolytic cell 37, so that the electrolytic stripping reaction on the surface of the diamond wire 35 is uniform and stable, and the local stripping effect difference caused by the fluctuation of solution concentration is reduced.

[0047] The stripping solution 34 in the electrolytic cell 37 is always higher than the slot of the partition plate 36. This ensures that the diamond wire 35 is completely submerged in the stripping solution 34 when passing through the slot (meeting the requirements of the electrolytic reaction), and also maintains a stable liquid level in the electrolytic cell 37 through overflow. In addition, the stripping solution 34 has a slight scouring effect on the surface of the diamond wire 35 during circulation, which can accelerate the removal of diamond particles and impurities that fall off with the nickel plating from the wire surface, avoiding local insulation or stripping obstruction caused by impurity adhesion. At the same time, the flowing solution can promptly carry the detached impurities into the storage tank 38, reducing the accumulation of impurities in the electrolytic cell 37 and reducing the risk of wire breakage caused by impurity friction.

[0048] like Figure 1-3As shown, the stripping tank 3 also includes a drive assembly 323 for providing power. The drive assembly 323 drives the main rollers 321 at both ends of the tank body 31 to rotate synchronously, so that the diamond wire 35 moves from one end of the tank body 31 to the other end. During the movement, the diamond wire 35 is immersed in the stripping solution 34. The drive assembly 323 is a motor, and the motor output shaft is fixed to the main roller 321. The main roller 321 is cylindrical and is arranged horizontally at both ends of the tank body 31. The main roller 321 can be directly installed on the outer wall of the tank body 31 or installed through a bracket. When the main roller 321 is directly installed on the outer wall of the tank body 31, the outer wall of the tank body 31 should be fixed with a fixing seat for connecting to the main roller 321. The bearings at both ends of the main roller 321 are fixed on the fixing seat on the outer wall of the tank body 31. The motor is installed on the outer wall of the tank body 31 and its output shaft is fixed to one end of the main roller 321. The central shaft of the main roller 321 is coaxial with the output shaft of the motor. When the main roller 321 is installed via a bracket, the motor is mounted on the bracket and its output shaft is fixed to one end of the main roller 321. The central shaft of the main roller 321 is coaxial with the motor output shaft. The bracket can be installed on a foundation plane or on the trough 31. This utility model does not specifically limit the installation method of the main roller 321.

[0049] Preferably, each main roller 321 corresponds to one drive assembly 323. This design, where a single main roller 321 corresponds to a single drive assembly 323, allows for precise adjustment of the main roller 321's speed through independent motor speed control (e.g., reducing the speed and extending the reaction time for thick-coated diamond wire 35, and increasing the speed and improving processing efficiency for thin-coated diamond wire 35). Compared to the traditional design where multiple rollers share a single drive assembly 323, this solution offers more flexible speed control and faster response, quickly adapting to the stripping process requirements of diamond wire 35 of different specifications, thus enhancing the equipment's process compatibility.

[0050] In the above technical solution, the purpose of the drive component 323 is mainly to drive the main roller 321 to rotate. The drive component 323 (motor) is directly fixed to the main rollers 321 at both ends of the tank 31, and the central axis of the main roller 321 is coaxial with the output shaft of the motor. This ensures that the motor power is transmitted to the main roller 321 accurately and without deviation, avoiding fluctuations in the speed of the main roller 321 due to transmission eccentricity. At the same time, the design of "one drive component 323 for each main roller 321" can achieve the same speed of the main rollers 321 at both ends through synchronous control, so that the diamond wire 35 maintains constant tension during movement, effectively preventing the wire from loosening, deviating or being stretched and deformed. This further ensures that the diamond wire 35 is always stably immersed in the stripping solution 34, providing a stable foundation for uniform stripping.

[0051] Preferably, each main roller 321 has 3-10 conductive rods 322 evenly distributed on its surface, with the length direction of the conductive rods 322 aligned with the axial direction of the main roller 321. When the diamond wire 35 is wound around the main roller 321, the conductive rods 322 will directly contact the tungsten wire diamond wire 35 to provide conductivity and prevent damage to the main roller 321. It should be noted that, to facilitate wire winding, wire openings can be provided around the main roller 321. This invention does not limit the number of wire openings on the main roller 321 and can adjust the number of wire openings according to the actual number of slots.

[0052] More preferably, the surface of the main roller 321 is provided with a groove for accommodating the conductive rod 322. The conductive rod 322 is engaged with the groove, or the conductive rod 322 is placed in the groove and fixed by adhesive tape 324. Specifically, in this embodiment, the groove does not have a limiting function, but is only used to accommodate the conductive rod 322. The conductive rod 322 is placed in the groove and fixed by wrapping it with adhesive tape 324.

[0053] In the above technical solution, 3-10 conductive rods 322 are evenly distributed on the surface of the main roller 321, and their length direction is consistent with the axial direction of the main roller 321. This allows the wound diamond wire 35 to contact multiple conductive rods 322 simultaneously, ensuring that the current is evenly distributed on the surface of the diamond wire 35. This design avoids the problems of current concentration or localized poor conductivity caused by single-point contact, and facilitates the dissolution reaction of the nickel plating (Ni-2e). - →Ni 2+ The stripping process is carried out uniformly along the entire length of the diamond wire 35, effectively preventing incomplete stripping or excessive corrosion in certain areas and improving the consistency of the tungsten wire after stripping. The conductive rod 322 is in direct contact with the diamond wire 35, enabling current conduction through its own conductivity and acting as an intermediate medium to isolate the diamond wire 35 from the surface of the main roller 321, preventing wear or scratches on the roller surface caused by direct friction between the diamond wire 35 (containing diamond particles) and the main roller 321. Especially for the reusable main roller 321, this design can significantly reduce the surface damage rate, extend the replacement cycle of the main roller 321, and reduce equipment maintenance costs.

[0054] The grooves on the surface of the main roller 321 provide positioning space for the conductive rod 322. The conductive rod 322 can be quickly installed via snap-fit ​​or tape 324, eliminating the need for complex connectors. When the conductive rod 322 needs replacement due to wear, the old rod can be directly removed and a new rod installed, significantly reducing downtime for maintenance and improving production continuity. The conductive rod 322 is positioned via grooves and secured by snap-fit ​​or tape 324, eliminating the need for additional heavy fixing components, thus reducing the overall weight of the main roller 321 and lowering the energy consumption of the drive motor. Simultaneously, the lightweight structure reduces the inertial impact during the rotation of the main roller 321, helping to maintain a stable rotational speed and indirectly ensuring the uniformity of the diamond wire 35's travel speed, further optimizing the stability of the stripping process.

[0055] like Figure 1 , 2 As shown, the cathode component 33 is a conductive material that will not undergo an electrolytic reaction with the stripping solution 34, and the material is preferably titanium alloy, graphite or stainless steel.

[0056] More preferably, the cathode assembly 33 is a titanium frame or titanium basket.

[0057] Specifically, in this embodiment, the cathode assembly 33 is a titanium frame. The titanium frame is located below the diamond wire 35 and spaced 50-100cm apart from the diamond wire 35 to ensure a safe distance between the wire and the titanium frame.

[0058] Main reaction principle:

[0059] Anode: Tungsten wire diamond wire 35 undergoes an oxidation reaction, the nickel plating on the surface of the tungsten wire dissolves, Ni-2e - →Ni 2+ The diamond grit on the tungsten wire diamond wire 35 will fall off along with the dissolution of the nickel plating; elemental tungsten metal is insoluble in hydrochloric acid, so this method can effectively separate the tungsten wire from the nickel plating on it;

[0060] Cathode: A reduction reaction occurs on the titanium frame, and nickel metal is deposited on the titanium frame. 2+ +2e - →Ni. Tungsten wire is prone to breakage when it comes into contact with nickel on the titanium frame. Therefore, a safe distance must be maintained between the wire and the titanium basket, and titanium metal will not react with the stripping solution 34.

[0061] like Figure 1 , 4 As shown, the stripping device includes, in sequence, an unwinding bin 1, a first washing tank 2, a stripping tank 3, an alkaline washing tank 4, a second washing tank 5, an oven 6, and a winding bin 7. The unwinding bin 1 mainly releases defective tungsten wire diamond wire 35 products, primarily guided by guide rollers. The tungsten wire diamond wire 35 is completely immersed and passes through the first washing tank 2, whose main purpose is to clean impurities from the surface of the diamond wire 35. The stripping tank 3 is used to remove the nickel plating layer from the surface of the tungsten wire diamond wire 35. The alkaline washing tank 4 is used to remove tungsten oxide and acid residue from the surface of the tungsten wire. During the alkaline washing process, the wire needs to be completely immersed in the solution and will move within it. The alkaline solution is a 40-90 g / L sodium hydroxide or potassium hydroxide solution. The main reactions are as follows:

[0062] NaOH + HCl → NaCl + H₂O;

[0063] WO3 + 2NaOH → Na2WO4 + H2O.

[0064] The tungsten wire diamond wire 35 is completely immersed and passes through the second water washing tank 5, which is used to wash away residual alkaline solution on the surface of the tungsten wire. The oven 6 is used to dry the tungsten wire to remove liquid from its surface. The winding bin 7 is used to collect the stripped tungsten wire, ready for use in the next round of electroplating.

[0065] When the stripping device of this invention is working, the defective tungsten wire diamond wire 35 is released from the unwinding chamber 1, passes through the first water washing tank 2 to clean surface impurities, and then enters the stripping tank 3. Inside the stripping tank 3, the main roller 321 is connected to the positive terminal of a DC power supply, the tungsten wire diamond wire 35 serves as the anode, and the titanium frame is connected to the negative terminal of the DC power supply as the cathode. In constant current mode, an oxidation reaction occurs at the anode, dissolving the nickel plating layer on the surface of the tungsten wire (Ni - 2e- → Ni). 2 +), the corundum is removed as the nickel plating dissolves; a reduction reaction occurs at the cathode, Ni 2 + Ni precipitation on the titanium frame 2 ++2e-→Ni). After stripping, the tungsten wire enters the alkaline washing tank 4, where the alkaline solution removes tungsten oxide and acid residue from the surface of the tungsten wire. Then, it is washed away with residual alkaline solution in the second water washing tank 5, dried in the oven 6, and finally collected in the winding bin 7, ready to be put back into electroplating production.

[0066] Depend on Figure 5 , 6 It can be seen that before the tungsten wire diamond wire 35 is stripped, its surface is uniformly covered with a large number of raised nickel plating layers and diamond particles embedded in the plating layer. The overall surface is rough and uneven. The plating layer is tightly bonded to the tungsten wire mother wire and there are no obvious signs of peeling off. However, after stripping in the stripping tank of this utility model, the nickel plating layer on the surface of the tungsten wire diamond wire has been completely peeled off. The diamond particles that were originally attached have completely fallen off as the plating layer dissolves, exposing the smooth and continuous cylindrical surface of the tungsten wire mother wire itself. There are no obvious scratches, corrosion pits or plating residues. Moreover, the diameter of the mother wire is uniform and there is no problem of wire thinning or deformation caused by excessive electrolysis.

[0067] Therefore, the deplating device of this invention can completely remove the nickel plating layer and the diamond grit, while effectively protecting the original morphology and performance of the tungsten wire busbar.

[0068] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A stripping tank, characterized by: include: The tank contains a stripping solution. The power supply is located outside the tank. Anode components are located at both ends of the tank. The cathode assembly is connected to the negative terminal of the power supply and is immersed in the stripping solution; The anode assembly includes a main roller and a conductive rod. The main roller is located at both ends of the tank and is connected to the positive terminal of the power supply. The conductive rod is disposed on the surface of the main roller. A diamond wire is wound around the main roller and in contact with the conductive rod. The diamond wire is immersed in the stripping solution.

2. A stripping tank according to claim 1, wherein: It also includes a drive assembly for driving the main rollers at both ends of the tank to rotate synchronously, so that the diamond wire moves from one end of the tank to the other end, and the diamond wire is immersed in the stripping solution during the movement.

3. A stripping tank according to claim 2, wherein: The drive component is a motor, and the output shaft of the motor is fixed to the main roller.

4. A stripping tank according to claim 1, wherein: The cathode assembly is made of titanium alloy, graphite, or stainless steel.

5. A stripping tank according to claim 4, wherein: The cathode assembly is a titanium frame or titanium basket, and the cathode assembly is located below the diamond wire and spaced 50-100cm apart from the diamond wire.

6. A stripping tank according to claim 1, wherein: Each main roller has 3-10 conductive rods evenly distributed on its surface, and the length direction of the conductive rods is consistent with the axial direction of the main roller.

7. A stripping tank according to claim 1, wherein: The surface of the main roller is provided with a groove for accommodating the conductive rod, and the conductive rod is engaged with the groove, or the conductive rod is placed in the groove and fixed with tape.

8. A stripping tank according to claim 1, wherein: The power supply uses a 12V / 100A DC power supply, set to constant current mode, with a current value of 50-90A and a running speed of 20-100m / min.

9. A stripping tank according to claim 1, wherein: The diamond wire busbar is a tungsten wire busbar or a polyester busbar.

10. A stripping apparatus, characterized by: The stripping tank according to any one of claims 1-9 further includes an unwinding bin, a first water washing tank, an alkaline washing tank, a second water washing tank, an oven, and a winding bin, wherein the unwinding bin, the first water washing tank, the stripping tank, the alkaline washing tank, the second water washing tank, the oven, and the winding bin are arranged sequentially.

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