Integrated circuit lead frame etching solution recovery device

Abstract

The application is suitable for the technical field of recovery devices, and provides an integrated circuit lead frame etching liquid recovery device, which comprises electrolysis equipment, neutralization equipment, filtration equipment, a liquid inlet pipe, a conveying pipeline, an automatic adding pipe, a temporary adding pipe, an automatic feeding system and a plugging mechanism. The plugging mechanism comprises a connecting pipe, a control sleeve, an upper plugging assembly and a lower plugging assembly. The connecting pipe is fixedly connected with the temporary adding pipe. The upper plugging assembly and the lower plugging assembly can release or restore the bidirectional sealing of the top end and the lateral gap of the connecting pipe in a manner of cooperation with the control sleeve. In this way, the temporary addition or temporary sampling of the mother liquor or the medicament can be completed, the sustainability and stability of the etching liquid reaction can be ensured, the reaction quality of the etching liquid can be intuitively understood, the leakage of harmful gas can be completely blocked, the entry of external impurities can be prevented, the pollution rate of the etching liquid can be reduced, and the stability of the recovery process of the device and the recovery purity of the etching liquid can be improved.

Description

Technical Field

[0001] This invention belongs to the field of recycling device technology, and particularly relates to an integrated circuit lead frame etching solution recycling device. Background Technology

[0002] As the core carrier connecting chips to external circuits, integrated circuit lead frames are widely used in the manufacturing process of etching. This process consumes a large amount of etching solution, which becomes ineffective after use due to the consumption of active ingredients and the dissolution of metal ions. Direct discharge not only wastes precious metal resources such as copper, but also causes serious environmental problems due to strong corrosion or high pollution. Therefore, etching solution recycling devices have become key environmental protection and energy-saving equipment in lead frame production.

[0003] Existing recycling devices typically employ a three-stage closed-loop structure consisting of electrolysis equipment, neutralization equipment, and filtration equipment. The recycling of etching solution is achieved through electrolysis to regenerate the active components of the etching solution, neutralization to remove residual metal ions, and filtration purification. To adapt to process adjustment and maintenance requirements, the electrolysis and neutralization equipment are usually equipped with automatic and temporary addition pipes: the automatic addition pipe is used for continuous replenishment of neutralizing agent or etching solution mother liquor, while the temporary addition pipe is used for emergency replenishment, process debugging, or etching solution sampling and testing. The temporary addition pipe is equipped with a self-locking pipe stopper.

[0004] However, existing recycling devices still have the following technical defects in practical applications: Existing self-locking pipe plugs use axial compression of rubber plugs to generate circumferential elastic deformation to achieve sealing, but they only rely on the elasticity of the rubber itself to form a single radial seal. Due to the poor corrosion resistance of the rubber plug material, it is easy to age or swell in the highly corrosive environment of the etching solution, and the seal has limited pressure resistance and cannot withstand the pressure impact of the reaction gas inside the equipment, which makes it very easy for gas leakage to occur.

[0005] Therefore, in view of the above situation, there is an urgent need to develop an integrated circuit lead frame etching solution recovery device to overcome the shortcomings in current practical applications. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an integrated circuit lead frame etching solution recovery device to solve the problems in the background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An integrated circuit lead frame etching solution recovery device includes an electrolysis unit, a neutralization unit, and a filtration unit. Each of the electrolysis unit, neutralization unit, and filtration unit is equipped with an inlet pipe. The electrolysis unit, neutralization unit, and filtration unit are sequentially connected via the inlet pipe and a conveying pipe. An automatic addition pipe and a temporary addition pipe are installed on the top of both the electrolysis unit and the neutralization unit. The automatic addition pipe is connected to an automatic feeding system. The device also includes:

[0009] The sealing mechanism comprises a connecting pipe, a control sleeve, an upper sealing assembly, and a lower sealing assembly. The connecting pipe is fixedly connected to a temporary addition pipe via a flange. The control sleeve is located on the outside of the connecting pipe, and upper and lower sealing grooves are respectively provided at the upper and lower ends of the control sleeve. The middle part of the inner wall of the control sleeve is threaded to the outer wall of the connecting pipe. The upper sealing assembly is embedded in the upper sealing groove, and its sealing end face is precisely fitted with the top opening of the connecting pipe. The lower sealing assembly is fixed on the outer wall of the connecting pipe and precisely fitted with the inner wall of the lower sealing groove.

[0010] The upper and lower sealing components release and restore the bidirectional seal on the top and side gaps of the connecting pipe by cooperating with the control sleeve. The upper sealing component releases the seal on the top of the connecting pipe to temporarily add the neutralizing agent and etching solution mother liquor to the electrolysis equipment and neutralization equipment through the temporary addition pipe, and temporarily samples the etching solution into the electrolysis equipment and neutralization equipment through the temporary addition pipe.

[0011] As a further technical solution of the present invention, the upper sealing assembly includes an upper annular block, an inclined guide groove, and a fan-shaped sealing plate. The upper annular block is fixedly installed in the upper sealing groove. The inner end face of the upper annular block is designed as a conical end face, and the end of the upper annular block with a larger opening is close to the top of the connecting pipe. Inclined guide grooves are equidistantly distributed on the inner circumference of the conical end face. The layout trajectory of the inclined guide grooves is consistent with the taper trajectory of the conical end face. The fan-shaped sealing plate is equidistantly distributed on the inner side of the upper annular block and slides with the inclined guide groove. The fan-shaped sealing plate is parallel to the top port of the connecting pipe.

[0012] As a further technical solution of the present invention, an annular groove connected to the lower sealing assembly is provided on the outer wall of the connecting pipe near the lower sealing groove. The annular groove is used for the installation of the lower sealing assembly and to realize the axial positioning of the lower sealing assembly on the outer wall of the connecting pipe.

[0013] As a further technical solution of the present invention, the lower sealing assembly includes a lower annular block, a pressure slider, an annular plate, a sealing spring, an expansion rubber ring, a pressure plate, an axial venting groove, and a radial venting groove. The lower annular block is located outside the connecting pipe and is connected to the annular groove by screws. The upper end face of the lower annular block has axial venting grooves distributed equidistantly in the circumferential direction, and the outer wall of the lower annular block has radial venting grooves distributed circumferentially in the circumferential direction. The distribution position and number of the axial venting grooves and radial venting grooves are consistent, and an L-shaped through channel is formed between a single axial venting groove and a corresponding radial venting groove. The pressure slider is axially slidably installed in the axial venting groove. The bottom of the pressure slider is connected to the sealing spring installed in the axial venting groove. The top of the pressure slider extends to the top of the lower annular block and is fixedly connected to the annular plate. The annular plate abuts against the top end face of the lower sealing groove. The upper and lower ends of the expansion rubber ring are respectively fixed to the upper and lower end faces of the lower annular block by pressure plates. The middle cavity of the expansion rubber ring is precisely aligned with the radial venting groove to form a gas-driven expansion sealing structure.

[0014] As a further technical solution of the present invention, the electrolysis equipment and the neutralization equipment are also provided with a stirring mechanism. The power input end of the stirring mechanism is connected to the liquid inlet pipe on the electrolysis equipment and the neutralization equipment, respectively, and the power output end of the stirring mechanism extends below the liquid surface of the electrolysis equipment and the neutralization equipment, respectively.

[0015] As a further technical solution of the present invention, the stirring mechanism includes a driving component and a stirring component. The driving component is fixedly connected to the liquid inlet pipes of the electrolysis device and the neutralization device, respectively. The stirring component is symmetrically distributed at both ends of the driving component and connected to it. One end of the stirring component extends below the liquid surface of the electrolysis device and the neutralization device.

[0016] As a further technical solution of the present invention, the driving assembly includes an L-shaped conduit, a driving tube, an extension tube, a driving shaft, and an impeller. The L-shaped conduit is connected to the inlet pipe as a whole through a flange. The driving tube is installed horizontally and vertically on the L-shaped conduit and is connected to the driving tube. Extension tubes are symmetrically fixed at both ends of the driving tube. The driving shaft passes through the driving tube and is rotatably connected to the extension tube. The driving shaft is connected to an agitator installed on the extension tube. The impeller is located inside the driving tube and is fixedly connected to the driving shaft. The rotation direction of the impeller is consistent with the liquid flow direction inside the L-shaped conduit.

[0017] As a further technical solution of the present invention, the L-shaped conduit and the inlet pipe are concentric, and the axis of the drive pipe is located above the axis of the L-shaped conduit.

[0018] As a further technical solution of the present invention, the impeller is provided with corrosion-resistant arc-shaped blades evenly distributed in the circumferential direction, and the end face of the arc-shaped blades that contacts the liquid is provided with transversely arranged grooves, which are used to increase the contact area between the arc-shaped blades and the liquid and the fluid adhesion.

[0019] As a further technical solution of the present invention, the agitation assembly includes a rotating block, an arc-shaped groove, a drive rod, a piston block, a piston tube, an agitation spring, and an agitation tube. The rotating block is located inside the extension tube and is fixedly connected to the drive shaft. The rotating block has arc-shaped grooves equidistantly spaced around its circumference that cooperate with the drive rod. The piston tube is vertically fixed to the bottom of the extension tube. The piston block is slidably installed inside the piston tube. The top of the piston block is fixed with a drive rod extending into the extension tube. The bottom of the piston block is connected to the agitation spring installed inside the piston tube. The agitation tubes are distributed on both sides of the piston tube and communicate with it. The bottom of the agitation tubes extends below the liquid surface of the electrolysis equipment and the neutralization equipment.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The connecting tube is fixedly connected to the temporary addition tube. When the connecting tube is opened, it is not only convenient to add the neutralizing agent and etching solution mother liquor from the connecting tube to the temporary addition tube, ensuring the sustainability and stability of the etching solution electrolysis reaction and neutralization reaction, and improving the recovery efficiency and quality of the etching solution, but also convenient to temporarily sample the etching solution from the electrolysis equipment or neutralization equipment through the connecting tube. This allows the staff to quickly and more intuitively understand the electrolyte quantity and neutralization quality of the etching solution, adapting to the multiple needs of emergency process adjustment and real-time quality detection.

[0022] The upper and lower sealing components, in conjunction with the control sleeve, can achieve bidirectional sealing of the top and side gaps of the connecting pipe. This not only completely prevents the leakage of harmful gases generated during electrolysis or neutralization, ensuring that the waste gas is collected, treated, and discharged in compliance with standards, thus mitigating environmental pollution risks and protecting the health of operators, but also prevents the entry of external dust or moisture, reducing the contamination rate of the etching solution. This ensures that the electrode activity in the electrolysis reaction or the concentration of reagents in the neutralization reaction are not affected by external factors, improving the stability of the device's recovery process and the purity of the recovered etching solution, while reducing the load on subsequent filtration equipment.

[0023] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0024] Figure 1 This is a front view of the integrated circuit lead frame etching solution recovery device provided in an embodiment of the present invention.

[0025] Figure 2 This is a side view of the integrated circuit lead frame etching solution recovery device provided in an embodiment of the present invention.

[0026] Figure 3 A bottom view of the internal structure of the integrated circuit lead frame etching solution recovery device provided in an embodiment of the present invention.

[0027] Figure 4 for Figure 2 Enlarged view of the central blocking mechanism.

[0028] Figure 5 for Figure 4 A cross-sectional view of the central sealing mechanism.

[0029] Figure 6 for Figure 5 Enlarged view of the structure at point A in the middle.

[0030] Figure 7 for Figure 4 Exploded view of the structure of the connecting pipe, control sleeve and upper sealing assembly.

[0031] Figure 8 for Figure 7 A bottom view of the structure of the middle connecting pipe, control sleeve, and upper sealing assembly.

[0032] Figure 9 for Figure 5 Enlarged view of the structure at point B.

[0033] Figure 10 for Figure 4 Exploded view of the middle and lower sealing components.

[0034] Figure 11 for Figure 3 Enlarged view of the stirring mechanism.

[0035] Figure 12 for Figure 11 A schematic diagram of the structure of the drive component and the agitation component.

[0036] Figure 13 for Figure 12 Enlarged view of the middle impeller structure.

[0037] Reference numerals: 100-Electrolysis equipment, 200-Transfer pipeline, 300-Neutralization equipment, 400-Inlet pipe, 500-Automatic addition pipe, 600-Temporary addition pipe, 700-Sealing mechanism, 710-Connecting pipe, 711-Annular groove, 720-Control sleeve, 721-Upper sealing groove, 722-Lower sealing groove, 730-Upper sealing assembly, 731-Upper annular block, 732-Inclined guide groove, 733-Fan-shaped sealing piece, 740-Lower sealing assembly, 741-Lower annular block, 742-Pressure slider, 743 - Annular plate, 744- Sealing spring, 745- Expansion rubber ring, 746- Pressure plate, 747- Axial venting groove, 748- Radial venting groove, 800- Agitator, 810- Drive assembly, 811- L-shaped conduit, 812- Drive tube, 813- Extension tube, 814- Drive shaft, 815- Impeller, 816- Groove, 820- Agitator assembly, 821- Rotating block, 822- Arc-shaped groove, 823- Drive rod, 824- Piston block, 825- Piston tube, 826- Agitator spring, 827- Agitator tube. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention 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 merely illustrative and not intended to limit the invention.

[0039] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0040] like Figures 1 to 13 As shown, an integrated circuit lead frame etching solution recovery device provided as an embodiment of the present invention includes an electrolysis device 100, a neutralization device 300, and a filtration device. Each of the electrolysis device 100, neutralization device 300, and filtration device is equipped with an inlet pipe 400. The electrolysis device 100, neutralization device 300, and filtration device are sequentially connected via the inlet pipe 400 and a conveying pipe 200. Each of the electrolysis device 100 and neutralization device 300 is equipped with an automatic addition pipe 500 and a temporary addition pipe 600. The automatic addition pipe 500 is used for automatically adding the required neutralizing agent or etching solution mother liquor and is connected to an automatic feeding system. The temporary addition pipe 600 is used for temporarily adding the required neutralizing agent and etching solution mother liquor or for temporary sampling of the etching solution. The device also includes:

[0041] The sealing mechanism 700 comprises a connecting pipe 710, a control sleeve 720, an upper sealing assembly 730, and a lower sealing assembly 740. The connecting pipe 710 is fixedly connected to a temporary addition pipe 600 via a flange. The control sleeve 720 is located outside the connecting pipe 710. The upper and lower ends of the control sleeve 720 are respectively provided with an upper sealing groove 721 and a lower sealing groove 722. The middle part of the inner wall of the control sleeve 720 is precisely threaded with the outer wall of the connecting pipe 710. The upper sealing assembly 730 is embedded in the upper sealing groove 721, and its sealing end face is precisely fitted with the top opening of the connecting pipe 710. The lower sealing assembly 740 is fixedly mounted on the outer wall of the connecting pipe 710 and precisely fitted with the inner wall of the lower sealing groove 722.

[0042] A stirring mechanism 800 is respectively installed in the electrolysis device 100 and the neutralization device 300. The power input end of the stirring mechanism 800 is connected to the liquid inlet pipe 400 on the electrolysis device 100 and the neutralization device 300 respectively. The power output end of the stirring mechanism 800 extends below the liquid surface of the electrolysis device 100 or the neutralization device 300 respectively. The liquid inlet pipe 400 can drive the stirring mechanism 800 to work by liquid inlet. The stirring mechanism 800 can change the flow direction of the liquid in the electrolysis device 100 or the neutralization device 300 by reciprocating suction. No additional motor or cylinder or other power components are required. It is driven only by the fluid pressure of the liquid inlet pipe 400, avoiding the risk of damage to electrical components in a highly corrosive environment. It ensures that the etching solution in the electrolysis device 100 is in full contact with the electrode and that the etching solution in the neutralization device 300 is fully mixed with the neutralizing agent. This shortens the electrolysis time and neutralization time of the etching solution, improves the recovery efficiency of the device, and meets the needs of rapid recovery of etching solution for integrated circuit lead frame.

[0043] When it is necessary to temporarily add neutralizing agent and etching solution mother liquor, or to temporarily sample the etching solution, the control sleeve 720 rotates upward outside the connecting pipe 710. By rotating upward, the control sleeve 720 simultaneously drives the upper sealing component 730 and the lower sealing component 740. The upper sealing component 730 releases the seal on the top opening of the connecting pipe 710, and the lower sealing component 740 releases the seal on the gap between the connecting pipe 710 and the lower sealing groove 722, allowing the connecting pipe 710 to... When in the open state, it not only facilitates the addition of neutralizing agent and etching solution mother liquor to temporary addition tube 600 through connecting tube 710, ensuring the sustainability and stability of etching solution electrolysis and neutralization reactions, and improving the recovery efficiency and quality of etching solution, but also allows for convenient temporary sampling of etching solution from electrolysis equipment 100 or neutralization equipment 300 through connecting tube 710. This enables staff to quickly and intuitively understand the electrolyte content and neutralization quality of the etching solution, meeting the multiple needs of emergency process adjustment and real-time quality detection.

[0044] When the connecting tube 710 completes temporary drug addition or temporary sampling, the control sleeve 720 rotates downward outside the connecting tube 710, thereby simultaneously driving the upper sealing assembly 730 and the lower sealing assembly 740 to work. The upper sealing assembly 730, by abutting against the top of the connecting tube 710, can move radially and axially relative to the control sleeve 720, thereby sealing the opening at the top of the connecting tube 710. The lower sealing assembly 740 can seal the gap between the connecting tube 710 and the lower sealing groove 722, thus completing the sealing of the connecting tube 710. The bidirectional sealing of the top and side gaps not only completely blocks the leakage of harmful gases generated during electrolysis or neutralization, ensuring that the waste gas is collected, treated, and discharged in compliance with standards, thus avoiding environmental pollution risks and protecting the health of operators; it also prevents the entry of external dust or moisture and other impurities, reducing the contamination rate of the etching solution, ensuring that the electrode activity in the electrolysis reaction or the concentration of reagents in the neutralization reaction are not affected by external factors, improving the stability of the device's recovery process and the purity of the recovered etching solution, while reducing the load on subsequent filtration equipment.

[0045] In a preferred embodiment, the electrolysis device 100 has a built-in ion exchange membrane, an anode and a cathode connecting plate, and the filtration device has a built-in adjustable height multi-layer filter plate for purifying and filtering the neutralized liquid.

[0046] like Figures 4 to 10 As shown, in a preferred embodiment of the present invention, the upper sealing assembly 730 includes an upper annular block 731, an inclined guide groove 732, and a fan-shaped sealing piece 733. The upper annular block 731 is fixedly installed in the upper sealing groove 721. The inner end face of the upper annular block 731 is designed as a conical end face, and the end of the upper annular block 731 with a larger opening is close to the top of the connecting pipe 710. Inclined guide grooves 732 are equidistantly distributed on the inner circumference of the conical end face. The layout trajectory of the inclined guide grooves 732 is consistent with the taper trajectory of the conical end face. The fan-shaped sealing piece 733 is equidistantly distributed on the inner side of the upper annular block 731 and slides with the inclined guide groove 732. The fan-shaped sealing piece 733 is parallel to the top port of the connecting pipe 710.

[0047] When it is necessary to temporarily add neutralizing agent and etching solution mother liquor, or to temporarily sample the etching solution, the control sleeve 720 rotates upward outside the connecting pipe 710. This upward rotation of the control sleeve 720 causes the upper annular block 731 and the inclined guide groove 732 to move upward synchronously. The inclined guide groove 732 moves away from the connecting pipe 710. At this time, the fan-shaped sealing pieces 733 slide downward relative to the inclined guide groove 732 under their own gravity, allowing multiple fan-shaped sealing pieces 733 to be inserted into the top port of the connecting pipe 710. The radial expansion of the tube releases the blockage at the top opening of the connecting tube 710, which not only facilitates the addition of neutralizing agent and etching solution mother liquor from the connecting tube 710 to the temporary addition tube 600, ensuring the sustainability and stability of the etching solution electrolysis and neutralization reactions, but also allows for the temporary sampling of etching solution from the connecting tube 710 into the electrolysis equipment 100 or the neutralization equipment 300. This enables staff to quickly and intuitively understand the electrolyte content and neutralization quality of the etching solution, meeting the multiple needs of emergency process adjustment and real-time quality detection.

[0048] When the connecting tube 710 completes the temporary addition or sampling of reagents, the control sleeve 720 rotates downward outside the connecting tube 710. The control sleeve 720 drives the upper annular block 731 and the inclined guide groove 732 to move downward. The upper annular block 731 can drive multiple fan-shaped sealing pieces 733 to radially contract through the conical end face and the inclined guide groove 732, thereby completing the sealing of the top opening of the connecting tube 710. This not only completely blocks the leakage of harmful gases generated during electrolysis or neutralization, ensuring that the waste gas is collected and treated in a centralized manner and discharged in compliance with standards, thus protecting the health of operators, but also prevents the entry of external dust or moisture and other impurities, reducing the contamination rate of the etching solution.

[0049] In a preferred embodiment, a sealing strip is provided between two adjacent fan-shaped sealing pieces 733, which can improve the sealing performance of the upper sealing assembly 730 to the connecting pipe 710, and the fan-shaped sealing pieces 733 are preferably made of high temperature resistant and corrosion resistant materials.

[0050] like Figures 4 to 10 As shown, in a preferred embodiment of the present invention, an annular groove 711 is provided on the outer wall of the connecting pipe 710 near the lower sealing groove 722. The annular groove 711 is used for the installation of the lower sealing assembly 740 and to realize the axial positioning of the lower sealing assembly 740 on the outer wall of the connecting pipe 710, so that the control sleeve 720 can quickly drive the lower sealing assembly 740 by rotating it up and down.

[0051] The lower sealing assembly 740 includes a lower annular block 741, a pressure slider 742, an annular plate 743, a sealing spring 744, an expansion rubber ring 745, a pressure plate 746, an axial vent groove 747, and a radial vent groove 748. The lower annular block 741 is located outside the connecting pipe 710 and is connected to the annular groove 711 by screws. The upper end face of the lower annular block 741 has axial vent grooves 747 evenly distributed around its circumference, and the outer wall of the lower annular block 741 has radial vent grooves 748 distributed around its circumference. The distribution position and number of the axial vent grooves 747 and the radial vent grooves 748 are consistent, and each axial vent groove 747 corresponds to one radial vent groove. An L-shaped through channel is formed between 748. The pressure slider 742 is axially slidably installed in the axial ventilation groove 747. The bottom of the pressure slider 742 is connected to the sealing spring 744 installed in the axial ventilation groove 747. The top of the pressure slider 742 extends to the top of the lower annular block 741 and is fixedly connected to the annular plate 743. The annular plate 743 abuts against the top end face of the lower sealing groove 722. The upper and lower ends of the expansion rubber ring 745 are fixed to the upper and lower end faces of the lower annular block 741 respectively by the pressure plate 746. The middle cavity of the expansion rubber ring 745 is precisely aligned with the radial ventilation groove 748 to form a gas-driven expansion sealing structure.

[0052] The expansion ring 745 is preferably a corrosion-resistant sealing ring with a U-shaped cross-section, made of PTFE-reinforced fluororubber, and suitable for strong acid and alkali environments with a pH value of 0-14.

[0053] When it is necessary to temporarily add neutralizer and etching solution mother liquor or to temporarily sample the etching solution, the control sleeve 720 rotates upward outside the connecting pipe 710. During the upward rotation of the control sleeve 720, the sealing spring 744 releases its own elastic force and drives the pressure slider 742 to move upward, so that the annular plate 743 always abuts against the upper sealing groove 721. The pressure slider 742 can form a negative pressure in the axial ventilation groove 747 by moving upward, so that the expansion rubber ring 745 can elastically contract and reset under the action of pressure difference and get out of contact with the lower sealing groove 722, thus releasing the radial seal on the connecting pipe 710.

[0054] When the connecting pipe 710 completes the temporary addition or sampling of the reagent, the control sleeve 720 rotates downward outside the connecting pipe 710. During the downward rotation of the control sleeve 720, it can squeeze the annular plate 743, so that the annular plate 743 can drive the pressure slider 742 to move downward in the axial ventilation groove 747. This not only squeezes the sealing spring 744, putting it in a stored state, but also squeezes the sealed gas in the axial ventilation groove 747 through the radial ventilation groove 748 into the hollow cavity of the expansion ring 745. Under the action of gas pressure, the expansion ring 745 expands radially outward, so that its outer wall can fit tightly against the inner wall of the lower sealing groove 722, thereby sealing the radial gap of the connecting pipe 710, preventing the exhaust gas from leaking out from the gap between the connecting pipe 710 and the lower sealing groove 722, ensuring that the exhaust gas is collected, treated and discharged in compliance with standards, thus avoiding the risk of environmental pollution and protecting the health of the operators.

[0055] like Figure 3 , Figures 11 to 13 In a preferred embodiment of the present invention, the stirring mechanism 800 includes a driving component 810 and a stirring component 820. The driving component 810 is fixedly connected to the liquid inlet pipes 400 on the electrolysis device 100 and the neutralization device 300, respectively. The stirring component 820 is symmetrically distributed at both ends of the driving component 810 and connected to it. One end of the stirring component 820 extends below the liquid surface of the electrolysis device 100 and the neutralization device 300.

[0056] The drive assembly 810 includes an L-shaped conduit 811, a drive pipe 812, an extension pipe 813, a drive shaft 814, and an impeller 815. The L-shaped conduit 811 is connected to the inlet pipe 400 as a whole via a flange. The drive pipe 812 is horizontally and vertically mounted on the L-shaped conduit 811 and is connected to the drive pipe 812. Extension pipes 813 are symmetrically fixed at both ends of the drive pipe 812. The drive shaft 814 passes through the drive pipe 812 and is rotatably connected to the extension pipe 813. The drive shaft 814 is connected to an agitator 820 mounted on the extension pipe 813. The impeller 815 is located inside the drive pipe 812 and is fixedly connected to the drive shaft 814. The rotation direction of the impeller 815 is consistent with the liquid flow direction inside the L-shaped conduit 811.

[0057] The L-shaped conduit 811 is concentric with the inlet pipe 400, and the axis of the drive pipe 812 is located above the axis of the L-shaped conduit 811. This ensures smooth flow of liquid in the L-shaped conduit 811 while allowing the liquid to effectively actuate the impeller 815.

[0058] When the etching solution enters the electrolysis device 100 or neutralization device 300 through the inlet pipe 400 and the L-shaped conduit 811, the liquid flows through the L-shaped conduit 811, which agitates the impeller 815, causing it to rotate. The impeller 815 drives the drive shaft 814 to rotate, and the drive shaft 814 drives the stirring component 820 to reciprocate. This allows the stirring component 820 to reciprocate the pumping of the reaction liquid in the electrolysis device 100 or neutralization device 300, thereby changing the flow direction of the liquid in the electrolysis device 100 or neutralization device 300. No additional motors or cylinders are required; the device is driven solely by the fluid pressure of the inlet pipe 400. This avoids the risk of damage to electrical components in highly corrosive environments, ensuring that the etching solution in the electrolysis device 100 is in full contact with the electrodes, and that the etching solution in the neutralization device 300 is fully mixed with the neutralizing agent. This shortens the electrolysis time and neutralization time of the etching solution, improves the recovery efficiency of the device, and meets the need for rapid recovery of etching solution from integrated circuit lead frame.

[0059] In a preferred embodiment, the impeller 815 has corrosion-resistant arc-shaped blades evenly distributed in the circumferential direction. The end face of the arc-shaped blades that contacts the liquid is provided with transversely arranged grooves 816. The grooves 816 can increase the contact area between the arc-shaped blades and the liquid and the fluid adhesion, while guiding the liquid to form local turbulence, avoiding the fluid from sliding on the blade surface, and improving the agitation efficiency of the impeller 815.

[0060] like Figure 3 , Figures 11 to 13 In a preferred embodiment of the present invention, the agitation assembly 820 includes a rotating block 821, an arc-shaped groove 822, a drive rod 823, a piston block 824, a piston tube 825, an agitation spring 826, and an agitation tube 827. The rotating block 821 is located inside the extension tube 813 and is fixedly connected to the drive shaft 814. The rotating block 821 has arc-shaped grooves 822 that cooperate with the drive rod 823 at equal intervals around its circumference. The piston tube 825 is vertically fixed to the bottom of the extension tube 813. The piston block 824 is slidably installed inside the piston tube 825. The top of the piston block 824 is fixed with a drive rod 823 extending into the extension tube 813. The bottom of the piston block 824 is connected to the agitation spring 826 installed inside the piston tube 825. The agitation tube 827 is distributed on both sides of the piston tube 825 and communicates with it. The bottom of the agitation tube 827 extends below the liquid surface of the electrolysis device 100 and the neutralization device 300.

[0061] When the etching solution enters the electrolysis equipment 100 or neutralization equipment 300 through the inlet pipe 400 and the L-shaped conduit 811, the liquid flows through the L-shaped conduit 811, which can agitate the impeller 815 to make it move in a circular motion. The impeller 815 drives the drive shaft 814 to rotate, and the drive shaft 814 drives the rotating block 821 to rotate. During the rotation of the rotating block 821, the circumferentially distributed arc-shaped grooves 822 can cooperate with the stirring spring 826, thereby driving the drive rod 823 that cooperates with it to make axial up-and-down reciprocating motion in the piston tube 825. The drive rod 823 drives the piston block 824 to reciprocate.

[0062] When the piston block 824 moves upward within the piston tube 825, a negative pressure is created within the piston tube 825. The force generated by this negative pressure can draw the liquid in the electrolysis device 100 or the neutralization device 300 through the stirring tube 827. When the piston block 824 moves downward within the piston tube 825, the pressure inside the piston tube 825 increases. The force generated by this high pressure can discharge the drawn-out liquid through the end of the stirring tube 827, thereby changing the flow direction of the liquid in the electrolysis device or the neutralization device 300. No additional motors or cylinders are required; the device is driven solely by the fluid pressure in the inlet pipe 400. This avoids the risk of damage to electrical components in highly corrosive environments, ensuring that the etching solution in the electrolysis device 100 is in full contact with the electrodes, and that the etching solution in the neutralization device 300 is fully mixed with the neutralizing agent. This shortens the electrolysis time and neutralization time of the etching solution, improves the recovery efficiency of the device, and meets the need for rapid recovery of etching solution from integrated circuit lead frame.

[0063] In a preferred embodiment, the end of the agitation tube 827 may be equipped with nozzles of different styles or nozzles with different tilt angles, depending on the actual situation, so as to meet the need to change the flow direction of the liquid in the equipment, realize the full-area agitation of the liquid in the equipment, and shorten the electrolysis time and neutralization time of the etching solution.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated circuit lead frame etching solution recovery device, comprising an electrolysis device, a neutralization device, and a filtration device, wherein each of the electrolysis device, neutralization device, and filtration device is equipped with an inlet pipe, and the electrolysis device, neutralization device, and filtration device are sequentially connected via the inlet pipe and a conveying pipe, characterized in that, Both the electrolysis equipment and the neutralization equipment are equipped with automatic and temporary feeding pipes at their tops. The automatic feeding pipes are connected to an automatic feeding system. The system also includes: The sealing mechanism comprises a connecting pipe, a control sleeve, an upper sealing assembly, and a lower sealing assembly. The connecting pipe is fixedly connected to a temporary addition pipe via a flange. The control sleeve is located on the outside of the connecting pipe, and upper and lower sealing grooves are respectively provided at the upper and lower ends of the control sleeve. The middle part of the inner wall of the control sleeve is threaded to the outer wall of the connecting pipe. The upper sealing assembly is embedded in the upper sealing groove, and its sealing end face is precisely fitted with the top opening of the connecting pipe. The lower sealing assembly is fixed on the outer wall of the connecting pipe and precisely fitted with the inner wall of the lower sealing groove. The upper and lower sealing components release and restore the bidirectional seal on the top and side gaps of the connecting pipe by cooperating with the control sleeve. The upper sealing component releases the seal on the top of the connecting pipe to temporarily add the neutralizing agent and etching solution mother liquor to the electrolysis equipment and neutralization equipment through the temporary addition pipe, and temporarily samples the etching solution into the electrolysis equipment and neutralization equipment through the temporary addition pipe.

2. The integrated circuit lead frame etching solution recovery device according to claim 1, characterized in that, The upper sealing assembly includes an upper annular block, inclined guide grooves, and fan-shaped sealing pieces. The upper annular block is fixedly installed in the upper sealing groove. The inner end face of the upper annular block is designed as a conical end face, and the end of the upper annular block with a larger opening is close to the top of the connecting pipe. Inclined guide grooves are evenly distributed circumferentially on the inner side of the conical end face. The layout trajectory of the inclined guide grooves is consistent with the taper trajectory of the conical end face. The fan-shaped sealing pieces are evenly distributed circumferentially on the inner side of the upper annular block and slide in cooperation with the inclined guide grooves. The fan-shaped sealing pieces are parallel to the top port of the connecting pipe.

3. The integrated circuit lead frame etching solution recovery device according to claim 2, characterized in that, An annular groove is provided on the outer wall of the connecting pipe near the lower sealing groove, which is connected to the lower sealing assembly. The annular groove is used for the installation of the lower sealing assembly and to limit the axial position of the lower sealing assembly on the outer wall of the connecting pipe.

4. The integrated circuit lead frame etching solution recovery device according to claim 3, characterized in that, The lower sealing assembly includes a lower annular block, a pressure slider, an annular plate, a sealing spring, an expansion rubber ring, a pressure plate, an axial venting groove, and a radial venting groove. The lower annular block is located outside the connecting pipe and is connected to the annular groove by screws. The upper end face of the lower annular block has axial venting grooves evenly distributed around its circumference, and the outer wall of the lower annular block has radial venting grooves distributed around its circumference. The distribution position and number of the axial and radial venting grooves are consistent, and an L-shaped through channel is formed between a single axial venting groove and a corresponding radial venting groove. The pressure slider is axially slidably installed in the axial venting groove. The bottom of the pressure slider is connected to the sealing spring installed in the axial venting groove. The top of the pressure slider extends to the top of the lower annular block and is fixedly connected to the annular plate. The annular plate abuts against the top end face of the lower sealing groove. The upper and lower ends of the expansion rubber ring are fixed to the upper and lower end faces of the lower annular block by pressure plates, respectively. The middle cavity of the expansion rubber ring is precisely aligned with the radial venting groove to form a gas-driven expansion sealing structure.

5. The integrated circuit lead frame etching solution recovery device according to claim 1, characterized in that, The electrolysis equipment and neutralization equipment are also equipped with a stirring mechanism. The power input end of the stirring mechanism is connected to the liquid inlet pipe on the electrolysis equipment and neutralization equipment, respectively, and the power output end of the stirring mechanism extends below the liquid surface of the electrolysis equipment and neutralization equipment, respectively.

6. The integrated circuit lead frame etching solution recovery device according to claim 5, characterized in that, The stirring mechanism includes a driving component and a stirring component. The driving component is fixedly connected to the liquid inlet pipes of the electrolysis device and the neutralization device, respectively. The stirring component is symmetrically distributed at both ends of the driving component and connected to it. One end of the stirring component extends below the liquid surface of the electrolysis device and the neutralization device.

7. The integrated circuit lead frame etching solution recovery device according to claim 6, characterized in that, The drive assembly includes an L-shaped conduit, a drive tube, an extension tube, a drive shaft, and an impeller. The L-shaped conduit is connected to the inlet pipe as a whole via a flange. The drive tube is horizontally and vertically mounted on the L-shaped conduit and is connected to the drive tube. Extension tubes are symmetrically fixed at both ends of the drive tube. The drive shaft passes through the drive tube and is rotatably connected to the extension tube. The drive shaft is connected to an agitator mounted on the extension tube. The impeller is located inside the drive tube and is fixedly connected to the drive shaft. The rotation direction of the impeller is consistent with the liquid flow direction inside the L-shaped conduit.

8. The integrated circuit lead frame etching solution recovery device according to claim 7, characterized in that, The L-shaped conduit is concentric with the inlet pipe, and the axis of the drive pipe is located above the axis of the L-shaped conduit.

9. The integrated circuit lead frame etching solution recovery device according to claim 7, characterized in that, The impeller has corrosion-resistant arc-shaped blades evenly distributed around its circumference. The end face of the arc-shaped blades that comes into contact with the liquid has transversely arranged grooves. These grooves are used to increase the contact area between the arc-shaped blades and the liquid, as well as the fluid adhesion.

10. The integrated circuit lead frame etching solution recovery device according to claim 7, characterized in that, The agitation assembly includes a rotating block, an arc-shaped groove, a drive rod, a piston block, a piston tube, an agitation spring, and an agitation tube. The rotating block is located inside the extension tube and is fixedly connected to the drive shaft. The rotating block has arc-shaped grooves equidistantly spaced around its circumference that mate with the drive rod. The piston tube is vertically fixed to the bottom of the extension tube. The piston block is slidably installed inside the piston tube. The top of the piston block is fixed with a drive rod extending into the extension tube. The bottom of the piston block is connected to the agitation spring installed inside the piston tube. The agitation tubes are distributed on both sides of the piston tube and communicate with it. The bottom of the agitation tubes extends below the liquid surface of the electrolysis and neutralization equipment.

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