A stirred tank and process for producing IC lead frame soaking softening liquid

Abstract

The present invention discloses a stirring kettle and process for producing an IC lead frame soaked in a softening liquid, and the present invention relates to the technical field of stirring kettles. The present invention includes a frame, an inner side surface of the frame is fixedly connected to an outer shell, a top cover is fixedly installed on the top of the outer shell, a stirring mechanism is fixedly connected to the frame, a surface of a mounting plate is fixedly connected to a driving assembly, the mounting plate is fixedly connected to the top of the top cover, the stirring assembly is slidably connected to the inner side surface of the outer shell, a premixing assembly is fixedly connected to the outer side surface of the frame, an output end of the driving assembly is fixedly connected to the premixing assembly, the output end of the driving assembly is transmission-connected to the stirring assembly, the inner cavity of the premixing assembly is communicated with the inner cavity of the outer shell, a driving assembly is provided, and the premixing assembly can drive the stirring assembly while premixing and diluting sulfuric acid, thereby fully utilizing the kinetic energy of the driving assembly and achieving an energy-saving effect.

Description

Technical Field

[0001] The invention relates to the technical field of stirred tanks, and in particular to a stirred tank and a process for producing IC lead frames soaked in softening liquid. Background Art

[0002] IC lead frame soaking and softening fluid is a chemical treatment fluid specifically designed for semiconductor packaging processes. Its primary function is to remove oxides, organic contaminants, and microscopic unevenness from the lead frame surface through controlled chemical micro-etching and surface activation, thereby enhancing the adhesion and reliability of subsequent electroplating or bonding processes. Its core components include oxidants, acidic media, and corrosion inhibitors. By adjusting the concentration, temperature, and soaking time, a uniform microscopic roughness is formed on the metal surface. During the production process, the solution stability, pH value, and impurity ion content must be strictly controlled. A three-stage water washing, neutralization, and drying process are used to ensure no residue, meeting the electronics manufacturing industry's requirements for high yield and green production.

[0003] The production of softening liquid usually needs to follow a fixed formula, and the production volume cannot be flexibly adjusted. In addition, the acidic medium will generate heat during mixing, which can easily affect the temperature during production. Therefore, we proposed a stirred tank and process for the production of IC lead frames immersed in softening liquid. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a stirred tank and process for producing IC lead frames soaked in softening liquid, comprising:

[0005] A frame, wherein the inner side of the frame is fixedly connected to the outer shell, and the top of the outer shell is fixedly mounted with a top cover;

[0006] A stirring mechanism, wherein the stirring mechanism is fixedly connected to the frame;

[0007] Wherein, the stirring mechanism comprises:

[0008] A mounting plate, a surface of which is fixedly connected to a drive assembly, and the mounting plate is fixedly connected to the top of the top cover;

[0009] a stirring assembly, the stirring assembly being slidably connected to the inner side surface of the housing;

[0010] A premixing assembly, wherein the premixing assembly is fixedly connected to the outer side surface of the frame;

[0011] The output end of the drive assembly is fixedly connected to the premixing assembly, the output end of the drive assembly is transmission-connected to the stirring assembly, and the inner cavity of the premixing assembly is in communication with the inner cavity of the housing;

[0012] Deionized water is injected into the shell, and deionized water is injected into the premixing component at the same time, and then sulfuric acid is injected. The driving component drives the premixing component to operate, dilutes it at a ratio of five to one, obtains a diluted sulfuric acid solution, and slowly injects the sulfuric acid solution into the shell. At the same time, the driving component drives the stirring component to stir, and then sodium persulfate is added to the shell at 80 grams per liter and stirred by the stirring component. Then, thiourea and a surfactant are added to the shell, and stirring is continued, followed by post-processing, and finally the softening liquid preparation is completed. By setting the driving component, the premixing component can drive the stirring component while premixing and diluting the sulfuric acid, and the kinetic energy of the driving component is fully utilized, which has an energy-saving effect. Through premixing, dilute sulfuric acid can be flexibly added, which facilitates flexible regulation of production volume. The premixing component is arranged outside the shell, which can prevent the heat generated when sulfuric acid and deionized water are mixed from interfering with the shell, thereby ensuring the constant temperature inside the shell.

[0013] Furthermore, filling pipes are symmetrically arranged on the top of the top cover, the ends of the filling pipes are fixedly connected to the surface of the top cover, and the filling pipes are communicated with the inner cavity of the outer shell. A discharge pipe is fixedly connected to the side of the outer shell away from the top cover, and the discharge pipe is fixedly connected at the center of the outer shell, and the discharge pipe is communicated with the inner cavity of the outer shell. The two filling pipes are used for filling dry materials and wet materials respectively, which can prevent the filling pipes from being blocked, and the softening liquid is discharged from the discharge pipe after stirring is completed.

[0014] Furthermore, the stirring assembly includes a stirring rod, which is transmission-connected to the output end of the driving assembly, and the stirring rod extends to the inside of the shell, the surface of the stirring rod is rotationally connected to the inner side of the top cover, the outer side of the stirring rod is slidingly connected to a leak-proof assembly, the outer side of the leak-proof assembly is fixedly connected to a stirring blade, and the stirring blade is arranged in a spiral shape, the surface of the stirring blade is slidingly connected to the inner side of the shell, the driving assembly drives the stirring rod to rotate, the stirring rod drives the leak-proof assembly to rotate, and then drives the stirring blade to rotate. When stirring, the spiral stirring blade can drive the liquid at the vertical height of the shell to mix, thereby obtaining a better mixing effect. When the spiral stirring blade rotates, it drives the leak-proof assembly to have a downward movement trend, and the leak-proof assembly is close to the discharge pipe to block the discharge pipe to avoid leakage of unfinished solution when the valve of the discharge pipe is loose.

[0015] Furthermore, the leakage-proof component includes a slide groove, which is opened on the outer side surface of the stirring rod, and the inner side surface of the slide groove is slidably connected to a slider, and the slider is set to a dovetail shape. The outer side surface of the stirring rod is slidably connected to a sleeve, and the inner side surface of the sleeve is fixedly connected to the surface of the slider. The stirring blade rotates, driving the sleeve and the slider to move downward, and the sleeve blocks the discharge pipe to avoid blockage while stirring. The dovetail-shaped slider drives the sleeve to rotate while allowing the sleeve to slide on the surface of the stirring rod, thereby achieving stirring and leakage prevention at the same time.

[0016] Furthermore, a sliding rod is provided inside the slide groove, and the two ends of the sliding rod are fixedly connected to the two sides of the slide groove respectively, and the sliding rod passes through the slider, and the inner side surface of the slider is slidably connected to the surface of the sliding rod, and the side of the slider away from the top cover is fixedly connected with a spring, and the end of the spring away from the slider is fixedly connected to the inner side surface of the slide groove, and the spring is sleeved on the outside of the sliding rod. The setting of the sliding rod can limit the slider to avoid excessive wear of the slider, and the setting of the spring can reset the slider to facilitate the unloading of the feeding pipe.

[0017] Furthermore, the premixing assembly includes a premixing cylinder, the bottom of the premixing cylinder is fixedly connected to a connecting pipe, and the connecting pipe portion is arranged in a spiral shape, and the spiral section of the connecting pipe is arranged flatly, the outer side surface of the premixing cylinder is fixedly connected to a fixed plate, the outer side surface of the fixed plate is fixedly connected to the surface of the frame, the outer side surface of the premixing cylinder is fixedly connected to a deionized water pipe, and the deionized water pipe and the connecting pipe are connected to the premixing cylinder, the deionized water pipe is injected into the premixing cylinder, sulfuric acid is injected and stirred from the inside of the deionized water, and the mixed dilute sulfuric acid enters the interior of the shell from the connecting pipe, the spiral section of the connecting pipe can extend the flow time of the dilute sulfuric acid, cool the dilute sulfuric acid, avoid the temperature inside the shell from rising, and ensure the normal production of the softening liquid. At the same time, the flat spiral section can further extend the flow time and obtain a better cooling effect.

[0018] Furthermore, a premixing rod is provided inside the premixing cylinder, and the premixing rod is fixedly connected to the output end of the driving assembly. The outer side of the premixing rod is fixedly connected to a premixing tube, and several premixing tubes are provided along the circumference of the premixing rod. The premixing rod rotates, driving the premixing tube to rotate, thereby stirring the deionized water and sulfuric acid. At the same time, sulfuric acid is injected into the deionized water from the premixing tube, which can prevent sulfuric acid from splashing on the surface of the deionized water.

[0019] Furthermore, the outer side surface of the premixing rod is fixedly connected to a circular plate, and there are two circular plates. A ring body is provided at the interval between the two circular plates, and the two ends of the ring body are respectively fixedly connected to the side of the two circular plates close to each other. The side of the premixing tube close to the circular plate is fixedly connected to a sulfuric acid tube, and the sulfuric acid tube passes through the circular plate close to the premixing cylinder, and the sulfuric acid tube extends to the inside of the ring body. The outer side surface of the sulfuric acid tube is fixedly connected to the inner side surface of the circular plate. The outer side surface of the ring body is fixedly connected to a connecting tube, which connects sulfuric acid. Sulfuric acid passes through the ring body, the sulfuric acid tube, and the premixing tube in turn, and is finally injected from the inside of the deionized water. The premixing rod rotates, driving the circular plate, the sulfuric acid tube, and the premixing tube to rotate, stirring the sulfuric acid and the deionized water to obtain a dilute sulfuric acid solution. The setting of the ring body can avoid interference with the filling and stirring of sulfuric acid.

[0020] Furthermore, the driving assembly includes a conveyor belt, the inner side surface of the conveyor belt is respectively connected to the surface of the premixing rod and the stirring rod, the end of the premixing rod located outside the premixing barrel is fixedly connected to a motor, and the output end of the motor is fixedly connected to the premixing rod, the side of the mounting plate away from the top cover is fixedly connected to a shield, and the shield is arranged outside the conveyor belt, the stirring rod and the premixing rod pass through the side of the shield close to the frame, and the surfaces of the stirring rod and the premixing rod are rotatably connected to the inner side surface of the shield, and the motor is started, and the output end of the motor drives the premixing rod to rotate, and at the same time drives the conveyor belt transmission, and finally drives the stirring rod to rotate, thereby realizing simultaneous driving of the premixing assembly and the stirring assembly.

[0021] A stirring process for producing IC lead frames soaked in softening liquid comprises the following steps:

[0022] Step 1: Pretreatment: prepare deionized water and inject it into the premix component, then inject sulfuric acid, and drive the premix component to run, diluting it at a ratio of 1:5 to obtain a diluted sulfuric acid solution;

[0023] Step 2: Prepare the base liquid by injecting deionized water into the housing, and slowly injecting the diluted sulfuric acid solution into the housing at a rate of 15 mL / L, while the driving component drives the stirring component to stir, and finally obtain the base liquid;

[0024] Step 3: To prevent leakage, the spiral stirring blade rotates, driving the sleeve and the slider to move downward. The sleeve blocks the discharge pipe to prevent leakage of unfinished solution.

[0025] Step 4: Dissolve the main agent by adding 80g / L of sodium persulfate into the shell and stirring with a stirring assembly to gradually dissolve the sodium persulfate into the base liquid;

[0026] Step 5: Add additives. Add thiourea as a sustained-release agent into the shell at 0.2 g / L, stir for a predetermined time, then add an appropriate amount of surfactant, continue stirring, and control the entire process below 40 degrees. Then perform post-processing to complete the preparation of the softening liquid.

[0027] The present invention has the beneficial effects:

[0028] 1. The present invention provides a stirring mechanism and a driving assembly so that the premixing assembly can drive the stirring assembly while premixing and diluting sulfuric acid, thereby fully utilizing the kinetic energy of the driving assembly and achieving energy-saving effects. Through premixing, dilute sulfuric acid can be flexibly added, which facilitates flexible regulation of production volume. The premixing assembly is arranged outside the shell, which can prevent the heat generated when sulfuric acid and deionized water are mixed from interfering with the shell, thereby ensuring the constant temperature inside the shell. The two filling pipes are used for filling dry materials and wet materials respectively, which can prevent the filling pipes from being blocked.

[0029] 2. The present invention provides a stirring assembly. When the spiral stirring blade is stirring, it can drive the liquid on the vertical height of the shell to mix, thereby obtaining a better mixing effect. When the spiral stirring blade rotates, it drives the leak-proof assembly to move downward. The leak-proof assembly is close to the discharge pipe and blocks the discharge pipe to avoid leakage of unfinished solution when the valve of the discharge pipe is loose.

[0030] 3. The present invention provides a leak-proof component and a dovetail-shaped slider, which drives the sleeve to rotate while allowing the sleeve to slide on the surface of the stirring rod, thereby achieving stirring and leak-proofing at the same time. The setting of the slide bar can limit the slider to avoid excessive wear of the slider. The setting of the spring can reset the slider, making it convenient for unloading from the discharge pipe.

[0031] 4. The present invention provides a premixing component, and the spiral section of the connecting pipe can extend the flow time of the dilute sulfuric acid, cool the dilute sulfuric acid, avoid the temperature rise inside the shell, and ensure the normal production of the softening liquid. At the same time, the flat spiral section can further extend the flow time and obtain a better cooling effect. The sulfuric acid is injected into the deionized water from the premixing pipe, which can prevent the sulfuric acid from splashing on the surface of the deionized water. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a flow chart of the stirring process of the present invention;

[0033] Figure 2 Schematic diagram of a stirred tank for producing IC lead frames soaked in softening liquid according to the present invention;

[0034] Figure 3 A schematic diagram of another perspective of a stirring tank for producing IC lead frames soaked in softening liquid according to the present invention;

[0035] Figure 4 Schematic diagram of the stirring mechanism of the present invention;

[0036] Figure 5 Schematic diagram of the cross section of the housing of the present invention;

[0037] Figure 6 Schematic diagram of the leak-proof assembly of the present invention;

[0038] Figure 7 This is a schematic diagram of the premix assembly of the present invention;

[0039] Figure 8 Schematic diagram of the drive assembly of the present invention.

[0040] In the figure: 1. frame; 2. outer shell; 3. top cover; 4. filling pipe; 5. stirring mechanism; 51. mounting plate; 52. drive assembly; 521. conveyor belt; 522. motor; 523. shield; 53. stirring assembly; 531. stirring rod; 532. leak-proof assembly; 5321. sleeve; 5322. chute; 5323. slide rod; 5324. slider; 5325. spring; 533. stirring blade; 54. premixing assembly; 541. premixing cylinder; 542. connecting pipe; 543. fixing plate; 544. deionized water pipe; 545. premixing rod; 546. premixing pipe; 547. sulfuric acid pipe; 548. circular plate; 549. ring body; 5410. connecting pipe; 6. discharge pipe. DETAILED DESCRIPTION

[0041] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0042] Example 1, please refer to Figures 1-6 The present invention is a stirred tank and process for producing IC lead frames soaked in softening liquid, comprising:

[0043] A frame 1, the inner side of the frame 1 is fixedly connected to a shell 2, and a top cover 3 is fixedly installed on the top of the shell 2;

[0044] A stirring mechanism 5, which is fixedly connected to the frame 1;

[0045] Wherein, the stirring mechanism 5 comprises:

[0046] A mounting plate 51, a driving assembly 52 is fixedly connected to the surface of the mounting plate 51, and the mounting plate 51 is fixedly connected to the top of the top cover 3;

[0047] A stirring assembly 53, the stirring assembly 53 is slidably connected to the inner side surface of the housing 2;

[0048] Premixing assembly 54, the premixing assembly 54 is fixedly connected to the outer side surface of the frame 1;

[0049] The output end of the drive assembly 52 is fixedly connected to the premixing assembly 54, the output end of the drive assembly 52 is in transmission connection with the stirring assembly 53, and the inner cavity of the premixing assembly 54 is in communication with the inner cavity of the housing 2;

[0050] Deionized water is injected into the shell 2, and deionized water is injected into the premixing component 54 at the same time, and then sulfuric acid is injected. The driving component 52 drives the premixing component 54 to run, dilutes it at a ratio of five to one, obtains a diluted sulfuric acid solution, and slowly injects the sulfuric acid solution into the shell 2. At the same time, the driving component 52 drives the stirring component 53 to stir, and then sodium persulfate is added to the shell 2 at 80 grams per liter, and stirred by the stirring component 53. Then, thiourea and a surfactant are added to the shell 2, and stirring is continued, followed by post-processing, and finally the softening liquid preparation is completed. By setting the driving component 52, the premixing component 54 can drive the stirring component 53 while premixing and diluting the sulfuric acid, and fully utilize the kinetic energy of the driving component 52, thereby achieving an energy-saving effect. The premixing component 54 is arranged outside the shell 2, which can prevent the heat generated when sulfuric acid and deionized water are mixed from interfering with the shell 2, thereby ensuring the constant temperature inside the shell 2.

[0051] A filling pipe 4 is symmetrically arranged on the top of the top cover 3, and the end of the filling pipe 4 is fixedly connected to the surface of the top cover 3, and the filling pipe 4 is communicated with the inner cavity of the outer shell 2. A discharge pipe 6 is fixedly connected to the side of the outer shell 2 away from the top cover 3, and the discharge pipe 6 is fixedly connected at the center of the outer shell 2, and the discharge pipe 6 is communicated with the inner cavity of the outer shell 2. The two filling pipes 4 are used for filling dry materials and wet materials respectively, which can prevent the filling pipe 4 from being blocked. The softening liquid is discharged from the discharge pipe 6 after stirring is completed.

[0052] The stirring assembly 53 includes a stirring rod 531, which is transmission-connected to the output end of the driving assembly 52, and the stirring rod 531 extends into the interior of the shell 2. The surface of the stirring rod 531 is rotatably connected to the inner side of the top cover 3. The outer side of the stirring rod 531 is slidably connected to the leak-proof assembly 532. The outer side of the leak-proof assembly 532 is fixedly connected to the stirring blade 533, and the stirring blade 533 is arranged in a spiral shape. The surface of the stirring blade 533 is slidably connected to the inner side of the shell 2. The driving assembly 52 drives the stirring rod 531 to rotate, and the stirring rod 531 drives the leak-proof assembly 532 to rotate, and then drives the stirring blade 533 to rotate. When stirring, the spiral stirring blade 533 can drive the liquid at a vertical height of the shell 2 to mix, thereby obtaining a better mixing effect. When the spiral stirring blade 533 rotates, it drives the leak-proof assembly 532 to move downward. The leak-proof assembly 532 approaches the discharge pipe 6 and blocks the discharge pipe 6 to prevent unfinished solution from leaking when the valve of the discharge pipe 6 is loose.

[0053] The leakage-proof component 532 includes a slide groove 5322, which is opened on the outer side surface of the stirring rod 531. The inner side surface of the slide groove 5322 is slidably connected to the slider 5324, and the slider 5324 is set to a dovetail shape. The outer side surface of the stirring rod 531 is slidably connected to the sleeve 5321, and the inner side surface of the sleeve 5321 is fixedly connected to the surface of the slider 5324. The stirring blade 533 rotates, driving the sleeve 5321 and the slider 5324 to move downward. The sleeve 5321 blocks the discharge pipe 6 to avoid blockage while stirring. The dovetail-shaped slider 5324 drives the sleeve 5321 to rotate, so that the sleeve 5321 can slide on the surface of the stirring rod 531, thereby achieving stirring and leakage prevention.

[0054] A slide rod 5323 is provided inside the slide groove 5322, and the two ends of the slide rod 5323 are fixedly connected to the two sides of the slide groove 5322 respectively, and the slide rod 5323 passes through the slider 5324, and the inner side surface of the slider 5324 is slidably connected to the surface of the slide rod 5323, and the side of the slider 5324 away from the top cover 3 is fixedly connected with a spring 5325, and the end of the spring 5325 away from the slider 5324 is fixedly connected to the inner side surface of the slide groove 5322, and the spring 5325 is sleeved on the outside of the slide rod 5323. The setting of the slide rod 5323 can limit the slider 5324 to avoid excessive wear of the slider 5324. The setting of the spring 5325 can reset the slider 5324 to facilitate the unloading of the unloading pipe 6.

[0055] Example 2, please refer to Figures 1-8The premixing assembly 54 includes a premixing cylinder 541, the bottom of the premixing cylinder 541 is fixedly connected to a connecting pipe 542, and the connecting pipe 542 is partially arranged in a spiral shape, and the spiral section of the connecting pipe 542 is flatly arranged, the outer side of the premixing cylinder 541 is fixedly connected to a fixing plate 543, the outer side of the fixing plate 543 is fixedly connected to the surface of the frame 1, the outer side of the premixing cylinder 541 is fixedly connected to a deionized water pipe 544, and the deionized water pipe 544 and the connecting pipe 542 are connected to the premixing cylinder 541, the deionized water pipe 544 is injected into the premixing cylinder 541, sulfuric acid is injected and stirred from the inside of the deionized water, and the mixed dilute sulfuric acid enters the interior of the shell 2 from the connecting pipe 542, the spiral section of the connecting pipe 542 can prolong the flow time of the dilute sulfuric acid, cool the dilute sulfuric acid, avoid the temperature rise inside the shell 2, and ensure the normal production of the softening liquid. At the same time, the flat spiral section can further prolong the flow time and obtain a better cooling effect.

[0056] A premixing rod 545 is provided inside the premixing cylinder 541, and the premixing rod 545 is fixedly connected to the output end of the driving assembly 52. The outer side of the premixing rod 545 is fixedly connected to a premixing tube 546, and several premixing tubes 546 are provided along the circumference of the premixing rod 545. The premixing rod 545 rotates, driving the premixing tubes 546 to rotate, thereby stirring the deionized water and sulfuric acid. At the same time, sulfuric acid is injected into the deionized water from the premixing tube 546, which can prevent sulfuric acid from splashing on the surface of the deionized water.

[0057] The outer side of the premixing rod 545 is fixedly connected to a circular plate 548, and there are two circular plates 548. A ring body 549 is provided at the interval between the two circular plates 548, and the two ends of the ring body 549 are fixedly connected to the side of the two circular plates 548 close to each other. The side of the premixing tube 546 close to the circular plate 548 is fixedly connected to a sulfuric acid tube 547, and the sulfuric acid tube 547 passes through the circular plate 548 close to the premixing cylinder 541, and the sulfuric acid tube 547 extends to the inside of the ring body 549, and the outer side of the sulfuric acid tube 547 is fixed to the circular plate 548 close to the premixing cylinder 541. The inner side of the circular plate 548 is fixedly connected, and the outer side of the ring body 549 is fixedly connected with a connecting pipe 5410. The connecting pipe 5410 is connected to sulfuric acid. The sulfuric acid passes through the ring body 549, the sulfuric acid pipe 547, and the premixing pipe 546 in sequence, and is finally injected from the inside of the deionized water. The premixing rod 545 rotates, driving the circular plate 548, the sulfuric acid pipe 547, and the premixing pipe 546 to rotate, stirring the sulfuric acid and deionized water to obtain a dilute sulfuric acid solution. The setting of the ring body 549 can avoid interference with the addition and stirring of sulfuric acid.

[0058] The driving assembly 52 includes a conveyor belt 521, the inner side surface of the conveyor belt 521 is respectively connected to the surface of the premixing rod 545 and the stirring rod 531, the end of the premixing rod 545 located outside the premixing barrel 541 is fixedly connected to the motor 522, and the output end of the motor 522 is fixedly connected to the premixing rod 545, the side of the mounting plate 51 away from the top cover 3 is fixedly connected to the shield 523, and the shield 523 is arranged outside the conveyor belt 521, the stirring rod 531 and the premixing rod 545 pass through the side of the shield 523 close to the frame 1, and the surfaces of the stirring rod 531 and the premixing rod 545 are rotatably connected to the inner side surface of the shield 523, and the motor 522 is started. The output end of the motor 522 drives the premixing rod 545 to rotate, and at the same time drives the conveyor belt 521 to transmit, and finally drives the stirring rod 531 to rotate, thereby realizing simultaneous driving of the premixing assembly 54 and the stirring assembly 53.

[0059] A stirring process for producing IC lead frames soaked in softening liquid comprises the following steps:

[0060] Step 1: Pretreatment: prepare deionized water and inject it into the premixing component 54, then inject sulfuric acid. The driving component 52 drives the premixing component 54 to operate, diluting the premixing component 54 at a ratio of 1:5 to obtain a diluted sulfuric acid solution.

[0061] Step 2: Prepare the base liquid. Inject deionized water into the housing 2, and slowly inject the diluted sulfuric acid solution into the housing 2 at a rate of 15 mL / L. Simultaneously, the driving component 52 drives the stirring component 53 to stir, and finally obtain the base liquid.

[0062] Step 3: To prevent leakage, the spiral stirring blade 533 rotates, driving the sleeve 5321 and the slider 5324 to move downward. The sleeve 5321 blocks the discharge pipe 6 to prevent leakage of unfinished solution.

[0063] Step 4: Dissolve the main agent. Add 80 g / L of sodium persulfate into the housing 2 and stir with the stirring assembly 53 to gradually dissolve the sodium persulfate into the base liquid.

[0064] Step 5: Add additives. Add thiourea as a slow-release agent into the shell 2 at 0.2 g / L, stir for a predetermined time, then add an appropriate amount of surfactant, continue stirring, and control the entire process below 40 degrees. Then perform post-processing to finally complete the preparation of the softening liquid.

[0065] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A stirred tank for producing IC lead frames soaked in softening liquid, characterized in that: include: A frame (1), the inner side of the frame (1) being fixedly connected to a housing (2), and a top cover (3) being fixedly mounted on the housing (2); A stirring mechanism (5), wherein the stirring mechanism (5) is fixedly connected to the frame (1); Wherein, the stirring mechanism (5) comprises: A mounting plate (51), a driving assembly (52) being fixedly connected to a surface of the mounting plate (51), and the mounting plate (51) being fixedly connected to the top of the top cover (3); a stirring assembly (53), wherein the stirring assembly (53) is slidably connected to the inner side surface of the housing (2); A premixing assembly (54), wherein the premixing assembly (54) is fixedly connected to the outer side surface of the frame (1); The output end of the drive assembly (52) is fixedly connected to the premixing assembly (54), the output end of the drive assembly (52) is transmission-connected to the stirring assembly (53), and the inner cavity of the premixing assembly (54) is in communication with the inner cavity of the housing (2); The stirring assembly (53) includes a stirring rod (531), the stirring rod (531) is transmission-connected to the output end of the driving assembly (52), and the stirring rod (531) extends into the interior of the housing (2), the surface of the stirring rod (531) is rotationally connected to the inner side of the top cover (3), the outer side of the stirring rod (531) is slidably connected to the leak-proof assembly (532), the outer side of the leak-proof assembly (532) is fixedly connected to the stirring blade (533), and the stirring blade (533) is arranged in a spiral shape, and the surface of the stirring blade (533) is slidably connected to the inner side of the housing (2); The anti-leakage component (532) includes a slide groove (5322), the slide groove (5322) is opened on the outer side surface of the stirring rod (531), the inner side surface of the slide groove (5322) is slidably connected to a slider (5324), and the slider (5324) is configured to be dovetail-shaped, the outer side surface of the stirring rod (531) is slidably connected to a sleeve (5321), and the inner side surface of the sleeve (5321) is fixedly connected to the surface of the slider (5324); A slide rod (5323) is provided inside the slide groove (5322), and the two ends of the slide rod (5323) are fixedly connected to the two sides of the slide groove (5322), and the slide rod (5323) passes through the slider (5324), and the inner side surface of the slider (5324) is slidably connected to the surface of the slide rod (5323), and a spring (5325) is fixedly connected to the side of the slider (5324) away from the top cover (3), and one end of the spring (5325) away from the slider (5324) is fixedly connected to the inner side surface of the slide groove (5322), and the spring (5325) is sleeved on the outside of the slide rod (5323).

2. The stirred tank for producing IC lead frames soaked in softening liquid according to claim 1, characterized in that: A filling pipe (4) is symmetrically provided on the top of the top cover (3), the end of the filling pipe (4) is fixedly connected to the surface of the top cover (3), and the filling pipe (4) is communicated with the inner cavity of the shell (2), and a discharge pipe (6) is fixedly connected to the side of the shell (2) away from the top cover (3), and the discharge pipe (6) is fixedly connected to the center of the shell (2), and the discharge pipe (6) is communicated with the inner cavity of the shell (2).

3. The stirred tank for producing IC lead frames soaked in softening liquid according to claim 1, characterized in that: The premixing assembly (54) includes a premixing barrel (541), a connecting pipe (542) is fixedly connected to the bottom of the premixing barrel (541), and the connecting pipe (542) is partially arranged in a spiral shape, and the spiral section of the connecting pipe (542) is arranged flatly, the outer side surface of the premixing barrel (541) is fixedly connected to a fixing plate (543), the outer side surface of the fixing plate (543) is fixedly connected to the surface of the frame (1), the outer side surface of the premixing barrel (541) is fixedly connected to a deionized water pipe (544), and the deionized water pipe (544) and the connecting pipe (542) are connected to the premixing barrel (541).

4. The stirred tank for producing IC lead frames soaked in softening liquid according to claim 3, characterized in that: A premixing rod (545) is provided inside the premixing cylinder (541), and the premixing rod (545) is fixedly connected to the output end of the driving assembly (52). A premixing tube (546) is fixedly connected to the outer side of the premixing rod (545), and a plurality of premixing tubes (546) are provided along the circumference of the premixing rod (545).

5. The stirred tank for producing IC lead frames soaked in softening liquid according to claim 4, characterized in that: The outer side surface of the premixing rod (545) is fixedly connected to a circular plate (548), and two circular plates (548) are provided. A ring body (549) is provided at the interval between the two circular plates (548), and the two ends of the ring body (549) are respectively fixedly connected to the sides of the two circular plates (548) close to each other. The side of the premixing tube (546) close to the circular plate (548) is fixedly connected to a sulfuric acid tube (547), and the sulfuric acid tube (547) passes through the circular plate (548) close to the premixing cylinder (541), and the sulfuric acid tube (547) extends to the inside of the ring body (549). The outer side surface of the sulfuric acid tube (547) is fixedly connected to the inner side surface of the circular plate (548), and the outer side surface of the ring body (549) is fixedly connected to a connecting tube (5410).

6. The stirred tank for producing IC lead frames soaked in softening liquid according to claim 5, characterized in that: The driving assembly (52) includes a conveyor belt (521), the inner side surface of the conveyor belt (521) is respectively connected to the surface of the premixing rod (545) and the stirring rod (531), one end of the premixing rod (545) located outside the premixing barrel (541) is fixedly connected to the motor (522), and the output end of the motor (522) is fixedly connected to the premixing rod (545), the side of the mounting plate (51) away from the top cover (3) is fixedly connected to the shield (523), and the shield (523) is arranged outside the conveyor belt (521), the stirring rod (531) and the premixing rod (545) pass through the side of the shield (523) close to the frame (1), and the surfaces of the stirring rod (531) and the premixing rod (545) are rotatably connected to the inner side surface of the shield (523).

7. A stirring process for producing IC lead frames by soaking in softening liquid, using the stirring tank according to claim 1, characterized in that: The following steps are involved: Step 1: Pretreatment: prepare deionized water, inject it into the premixing component (54), and then inject sulfuric acid. The driving component (52) drives the premixing component (54) to operate, dilute it at a ratio of 1:5, and obtain a diluted sulfuric acid solution; Step 2: preparing the base liquid. Deionized water is injected into the housing (2). The diluted sulfuric acid solution is slowly injected into the housing (2) at a rate of 15 mL / L. At the same time, the driving component (52) drives the stirring component (53) to stir, and finally the base liquid is obtained. Step 3: To prevent leakage, the spiral stirring blade (533) rotates, driving the sleeve (5321) and the slider (5324) to move downward, and the sleeve (5321) blocks the discharge pipe (6) to prevent leakage of unfinished solution; Step 4: dissolving the main agent, adding 80 g / L of sodium persulfate into the interior of the shell (2), and stirring with the stirring component (53) to gradually dissolve the sodium persulfate into the interior of the base liquid; Step 5: Add additives. Add thiourea as a slow-release agent to the inside of the shell (2) at a rate of 0.2 g / L. Stir for a predetermined time, then add an appropriate amount of surfactant, continue stirring, and control the entire process to be below 40 degrees. Then perform post-processing to finally complete the preparation of the softening liquid.

Images