Stirring kettle and process for production of IC (integrated circuit) lead frame soaked in softening liquid

Abstract

The invention discloses a stirring kettle and technology for production of an IC lead frame soaked in softening liquid, and relates to the technical field of stirring kettles. The inner side surface of the frame body is fixedly connected with a shell; the top of the shell is fixedly provided with a top cover; a stirring mechanism is fixedly connected with the frame body; the surface of a mounting plate is fixedly connected with a driving assembly; the premixing assembly is fixedly connected with the outer side face of the frame body, the output end of the driving assembly is fixedly connected with the premixing assembly, the output end of the driving assembly is in transmission connection with the stirring assembly, and an inner cavity of the premixing assembly communicates with an inner cavity of the shell; and kinetic energy of the driving assembly is fully utilized, and the energy-saving effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of stirring kettles, and particularly relates to a stirring kettle and a process for producing an IC lead frame soaking softening solution. Background Art

[0002] The IC lead frame soaking softening solution is a chemical treatment solution dedicated to the semiconductor packaging process. Its main function is to remove oxides, organic pollutants and microscopic uneven layers on the surface of the lead frame through controllable 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 need to be strictly controlled, supplemented by post-treatments such as three-stage water washing, neutralization and drying to ensure no residue, meeting the requirements of the electronics manufacturing industry for high yield and green production; The production of the softening solution usually needs to be carried out according to a fixed formula, and the production volume cannot be flexibly adjusted. Moreover, heat is generated when the acidic medium is mixed, which easily affects the temperature during production. Therefore, we propose a stirring kettle and a process for producing an IC lead frame soaking softening solution. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a stirring kettle and a process for producing an IC lead frame soaking softening solution, including: A frame body, an outer shell is fixedly connected to the inner side surface of the frame body, and a top cover is fixedly installed on the top of the outer shell; A stirring mechanism, which is fixedly connected to the frame body; Among them, the stirring mechanism includes: A mounting plate, a driving component is fixedly connected to the surface of the mounting plate, and the mounting plate is fixedly connected to the top of the top cover; A stirring component, which is slidably connected to the inner side surface of the outer shell; A premixing component, which is fixedly connected to the outer side surface of the frame body; The output end of the driving component is fixedly connected to the premixing component, the output end of the driving component is in transmission connection with the stirring component, and the inner cavity of the premixing component is communicated with the inner cavity of the outer shell; 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 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. At the same time, the driving component drives the stirring component to stir, and then sodium persulfate is added into the shell at 80 grams per liter, and stirred by the stirring component, and then thiourea and a surfactant are added into the shell, and stirring is continued, and then post-processing is performed to finally complete the preparation of the softening liquid. 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 is convenient for 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.

[0004] 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 respectively used for filling dry materials and wet materials, which can prevent the filling pipes from being blocked, and the softening liquid is discharged from the discharge pipe after stirring is completed.

[0005] 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 slidably connected with a leak-proof assembly, the outer side of the leak-proof assembly is fixedly connected with 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, and the spiral stirring blade can drive the liquid at the vertical height of the shell to mix when stirring, so as to obtain a better mixing effect, and the spiral stirring blade drives the leak-proof assembly to move downward when rotating, 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.

[0006] Furthermore, the leak-proof component includes a chute which is opened on the outer side surface of the stirring rod. A slider is slidably connected to the inner side surface of the chute, and the slider is in the shape of a dovetail. A sleeve is slidably connected to the outer side surface of the stirring rod, and the inner side surface of the sleeve is fixedly connected to the surface of the slider. When the stirring blade rotates, it drives the sleeve and the slider to move downward, and the sleeve blocks the material discharging pipe, preventing blockage during stirring. The dovetail-shaped slider enables the sleeve to slide on the surface of the stirring rod while driving the sleeve to rotate, achieving both stirring and leak prevention simultaneously.

[0007] Furthermore, a sliding rod is arranged inside the chute. The two ends of the sliding rod are respectively fixedly connected to the two sides of the chute, and the sliding rod penetrates through the slider. The inner side surface of the slider is slidably connected to the surface of the sliding rod. A spring is fixedly connected to the side of the slider away from the top cover, and the end of the spring away from the slider is fixedly connected to the inner side surface of the chute. The spring is sleeved outside the sliding rod. The sliding rod can limit the position of the slider to avoid excessive wear of the slider. The spring can reset the slider, facilitating the discharging of the material discharging pipe.

[0008] Furthermore, the premixing component includes a premixing cylinder. A communicating pipe is fixedly connected to the bottom of the premixing cylinder. Part of the communicating pipe is in a spiral shape, and the spiral section of the communicating pipe is flat. A fixing plate is fixedly connected to the outer side surface of the premixing cylinder, and the outer side surface of the fixing plate is fixedly connected to the surface of the frame body. A deionized water pipe is fixedly connected to the outer side surface of the premixing cylinder. The deionized water pipe and the communicating pipe are communicated with the premixing cylinder. Deionized water is injected into the premixing cylinder, and sulfuric acid is injected into and stirred in the deionized water. The mixed dilute sulfuric acid enters the interior of the outer shell through the communicating pipe. The spiral section of the communicating pipe can extend the flow time of the dilute sulfuric acid, cooling the dilute sulfuric acid and preventing the temperature inside the outer shell from rising, ensuring the normal production of the softening liquid. At the same time, the flat spiral section can further extend the flow time, obtaining a better cooling effect.

[0009] Furthermore, a premixing rod is arranged inside the premixing cylinder. The premixing rod is fixedly connected to the output end of the driving component. A premixing pipe is fixedly connected to the outer side surface of the premixing rod, and a number of premixing pipes are arranged circumferentially along the premixing rod. When the premixing rod rotates, it drives the premixing pipes to rotate, thereby stirring the deionized water and sulfuric acid. At the same time, sulfuric acid is injected into the deionized water through the premixing pipes, which can prevent sulfuric acid from splashing on the surface of the deionized water.

[0010] Furthermore, a circular plate is fixedly connected to the outer side surface of the premixing rod, and two circular plates are provided, 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 sides of the two circular plates close to each other, a sulfuric acid tube is fixedly connected to the side of the premixing tube close to the circular plate, and the sulfuric acid tube penetrates 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 pipe, the connecting pipe is connected to sulfuric acid, the 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, the sulfuric acid and the deionized water are stirred, and a dilute sulfuric acid solution is obtained. The setting of the ring body can avoid interference with the filling and stirring of sulfuric acid.

[0011] 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, the motor is started, the output end of the motor drives the premixing rod to rotate, and at the same time drives the conveyor belt to drive, and finally drives the stirring rod to rotate, thereby realizing simultaneous driving of the premixing assembly and the stirring assembly.

[0012] A stirring process for producing an IC lead frame soaked in a softening liquid comprises the following steps: Step 1: pretreatment, prepare deionized water, inject it into the premix component, then inject sulfuric acid, drive the premix component to run, dilute it at a ratio of 1:5, and obtain a diluted sulfuric acid solution; Step 2: base liquid preparation: deionized water is injected into the shell, and the diluted sulfuric acid solution is slowly injected into the shell at a rate of 15 mL / L, and at the same time, the driving component drives the stirring component to stir, and finally the base liquid is obtained; Step 3: To prevent leakage, the spiral stirring blade rotates, driving the sleeve and the slider to move downward, and the sleeve blocks the feed pipe to prevent leakage of unfinished solution; Step 4: Dissolve the main agent, add 80g / L of sodium persulfate into the shell, and stir it through the stirring component to gradually dissolve the sodium persulfate into the base liquid; 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 finally complete the preparation of the softening liquid.

[0013] Advantages of the present invention: 1. By setting up a stirring mechanism in the present invention, the driving component enables the premixing component to drive the stirring component while premixing and diluting sulfuric acid, making full use of the kinetic energy of the driving component to achieve an energy-saving effect. Through premixing, dilute sulfuric acid can be flexibly added, facilitating the flexible adjustment of production volume. The premixing component is arranged outside the outer shell, which can prevent the heat generated during the mixing of sulfuric acid and deionized water from interfering with the inside of the outer shell, ensuring the constancy of the temperature inside the outer shell. The two filling pipes are respectively used for filling dry materials and wet materials, which can prevent the filling pipes from being blocked.

[0014] 2. By setting up a stirring component in the present invention, when the spiral stirring blades are stirring, they can drive the liquid in the vertical height of the outer shell to mix, obtaining a better mixing effect. When the spiral stirring blades rotate, they drive the leak-proof component to have a downward movement trend. The leak-proof component is close to the discharge pipe to block the discharge pipe, preventing the leakage of the unfinished solution when the valve of the discharge pipe becomes loose.

[0015] 3. By setting up a leak-proof component in the present invention, the dovetail-shaped slider can make the sleeve slide on the surface of the stirring rod while driving the sleeve to rotate, achieving both stirring and leak prevention at the same time. The setting of the sliding rod can limit the slider to prevent excessive wear of the slider. The setting of the spring can reset the slider, facilitating the discharging of the discharge pipe.

[0016] 4. By setting up a premixing component in the present invention, the spiral section of the connecting pipe can extend the flow time of dilute sulfuric acid to cool the dilute sulfuric acid, preventing the temperature inside the outer shell from rising, ensuring the normal production of the softening liquid. At the same time, the flat spiral section can further extend the flow time to obtain a better cooling effect. Sulfuric acid is injected into deionized water from the premixing pipe, which can prevent sulfuric acid from splashing on the surface of deionized water. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a flowchart of the stirring process of the present invention; Figure 2 is a schematic diagram of a stirring kettle for the production of IC lead frame soaked in softening liquid according to the present invention; Figure 3 is another perspective schematic diagram of a stirring kettle for the production of IC lead frame soaked in softening liquid according to the present invention; Figure 4 is a schematic diagram of the stirring mechanism of the present invention; Figure 5 is a schematic cross-sectional view of the outer shell of the present invention; Figure 6 is a schematic diagram of the leak-proof component of the present invention; Figure 7 is a schematic diagram of the premixing component of the present invention; Figure 8Schematic diagram of the driving component of the present invention.

[0018] In the figure: 1, frame; 2, outer shell; 3, top cover; 4, filling pipe; 5, stirring mechanism; 51, mounting plate; 52, driving component; 521, conveyor belt; 522, motor; 523, protective cover; 53, stirring component; 531, stirring rod; 532, anti-leakage component; 5321, sleeve; 5322, chute; 5323, sliding rod; 5324, slider; 5325, spring; 533, stirring blade; 54, premixing component; 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, blanking pipe. Detailed implementation manners

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

[0020] Example 1, please refer to Figures 1 - 6 , the present invention is a stirring kettle and process for producing IC lead frame soaking softening liquid, including: Frame 1, the inner side surface of the frame 1 is fixedly connected with an outer shell 2, and the top of the outer shell 2 is fixedly installed with a top cover 3; Stirring mechanism 5, the stirring mechanism 5 is fixedly connected with the frame 1; Among them, the stirring mechanism 5 includes: Mounting plate 51, the surface of the mounting plate 51 is fixedly connected with a driving component 52, and the mounting plate 51 is fixedly connected to the top of the top cover 3; Stirring component 53, the stirring component 53 is slidably connected to the inner side surface of the outer shell 2; Premixing component 54, the premixing component 54 is fixedly connected to the outer side surface of the frame 1; The output end of the driving component 52 is fixedly connected to the premixing component 54, the output end of the driving component 52 is in transmission connection with the stirring component 53, and the inner cavity of the premixing component 54 is communicated with the inner cavity of the outer shell 2; 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 a rate of 80 grams per liter, and stirred by the stirring component 53, and then thiourea and surfactant are added to the shell 2, and stirring is continued, followed by post-treatment, 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 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.

[0021] 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 respectively used for filling dry materials and wet materials, which can prevent the filling pipe 4 from being blocked, and the softening liquid is discharged from the discharge pipe 6 after stirring.

[0022] 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 to the inside 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 with a leak-proof assembly 532, the outer side of the leak-proof assembly 532 is fixedly connected with a 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, 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, so as to obtain a better mixing effect. When the spiral stirring blade 533 rotates, it drives the leak-proof assembly 532 to have a downward movement trend, and the leak-proof assembly 532 is close to the discharge pipe 6 to block the discharge pipe 6 to prevent the unfinished solution from leaking when the valve of the discharge pipe 6 is loose.

[0023] The leak-proof component 532 includes a chute 5322 which is opened on the outer side surface of the stirring rod 531. A slider 5324 is slidably connected to the inner side surface of the chute 5322, and the slider 5324 is arranged in a dovetail shape. A sleeve 5321 is slidably connected to the outer side surface of the stirring rod 531, and the inner side surface of the sleeve 5321 is fixedly connected to the surface of the slider 5324. When the stirring blade 533 rotates, it drives the sleeve 5321 and the slider 5324 to move downward, and the sleeve 5321 blocks the material discharging pipe 6, preventing blockage during stirring. The dovetail-shaped slider 5324 enables the sleeve 5321 to slide on the surface of the stirring rod 531 while driving the sleeve 5321 to rotate, achieving both stirring and leak prevention simultaneously.

[0024] A slide bar 5323 is arranged inside the chute 5322. Both ends of the slide bar 5323 are fixedly connected to both sides of the chute 5322, and the slide bar 5323 penetrates through the slider 5324. The inner side surface of the slider 5324 is slidably connected to the surface of the slide bar 5323. A spring 5325 is fixedly connected to the side of the slider 5324 away from the top cover 3. One end of the spring 5325 away from the slider 5324 is fixedly connected to the inner side surface of the chute 5322, and the spring 5325 is sleeved outside the slide bar 5323. The arrangement of the slide bar 5323 can limit the slider 5324 to prevent excessive wear of the slider 5324. The arrangement of the spring 5325 can reset the slider 5324, facilitating the discharging of the material discharging pipe 6.

[0025] Example 2, please refer to Figures 1 - 8 , the premixing component 54 includes a premixing cylinder 541. A communicating pipe 542 is fixedly connected to the bottom of the premixing cylinder 541. Part of the communicating pipe 542 is arranged in a spiral shape, and the spiral section of the communicating pipe 542 is flat. A fixing plate 543 is fixedly connected to the outer side surface of the premixing cylinder 541, and the outer side surface of the fixing plate 543 is fixedly connected to the surface of the frame body 1. A deionized water pipe 544 is fixedly connected to the outer side surface of the premixing cylinder 541, and both the deionized water pipe 544 and the communicating pipe 542 communicate with the premixing cylinder 541. The deionized water pipe 544 injects into the premixing cylinder 541, and sulfuric acid is injected and stirred from inside the deionized water. The mixed dilute sulfuric acid enters the interior of the outer shell 2 through the communicating pipe 542. The spiral section of the communicating pipe 542 can extend the flow time of the dilute sulfuric acid, cooling the dilute sulfuric acid to prevent the temperature inside the outer shell 2 from rising, ensuring 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.

[0026] Inside the premixing cylinder 541, there is a premixing rod 545. The premixing rod 545 is fixedly connected to the output end of the driving assembly 52. On the outer side surface of the premixing rod 545, there is a fixedly connected premixing pipe 546. And a number of premixing pipes 546 are arranged along the circumferential direction of the premixing rod 545. When the premixing rod 545 rotates, it drives the premixing pipe 546 to rotate, thereby stirring deionized water and sulfuric acid. At the same time, sulfuric acid is injected into the deionized water from the premixing pipe 546, which can avoid the splashing of sulfuric acid on the surface of deionized water.

[0027] On the outer side surface of the premixing rod 545, there are two fixedly connected circular plates 548. Between the two circular plates 548, there is an annular body 549. And both ends of the annular body 549 are fixedly connected to the closer sides of the two circular plates 548 respectively. On the side of the premixing pipe 546 close to the circular plate 548, there is a sulfuric acid pipe 547 fixedly connected. And the sulfuric acid pipe 547 penetrates through the circular plate 548 close to the premixing cylinder 541 and extends into the annular body 549. The outer side surface of the sulfuric acid pipe 547 is fixedly connected to the inner side surface of the circular plate 548. On the outer side surface of the annular body 549, there is a connecting pipe 5410 fixedly connected. The connecting pipe 5410 is connected to sulfuric acid. Sulfuric acid passes through the annular body 549, the sulfuric acid pipe 547, and the premixing pipe 546 in sequence and is finally injected from inside the deionized water. When the premixing rod 545 rotates, it drives the circular plate 548, the sulfuric acid pipe 547, and the premixing pipe 546 to rotate, stirring sulfuric acid and deionized water to obtain a dilute sulfuric acid solution. The setting of the annular body 549 can avoid interference between the filling and stirring of sulfuric acid.

[0028] The driving assembly 52 includes a conveyor belt 521. The inner side surface of the conveyor belt 521 is respectively in transmission connection with the surfaces of the premixing rod 545 and the stirring rod 531. At the end of the premixing rod 545 outside the premixing cylinder 541, there is a fixedly connected motor 522. And the output end of the motor 522 is fixedly connected to the premixing rod 545. On the side of the mounting plate 51 far from the top cover 3, there is a fixedly connected protective cover 523. And the protective cover 523 is arranged outside the conveyor belt 521. The stirring rod 531 and the premixing rod 545 penetrate through the side of the protective cover 523 close to the frame body 1. And the surfaces of the stirring rod 531 and the premixing rod 545 are rotatably connected to the inner side surface of the protective cover 523. Start the motor 522. 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 drive, and finally drives the stirring rod 531 to rotate, realizing the simultaneous driving of the premixing assembly 54 and the stirring assembly 53.

[0029] A stirring process for the production of IC lead frame soaking softening liquid includes the following steps: Step 1: Pretreatment. Prepare deionized water, inject it into the premixing assembly 54, and then inject sulfuric acid. The driving assembly 52 drives the premixing assembly 54 to operate and dilutes it in a ratio of 1:5 to obtain a diluted sulfuric acid solution; Step 2: Preparation of base solution. Deionized water is injected into the interior of the outer shell 2, and the diluted sulfuric acid solution is slowly injected into the interior of the outer shell 2 at a rate of 15 mL / L. Meanwhile, the driving assembly 52 drives the stirring assembly 53 to stir, and finally the base solution is obtained; Step 3: Prevent leakage. The spiral stirring blade 533 rotates, driving the sleeve 5321 and the slider 5324 to move downward. The sleeve 5321 blocks the material discharging pipe 6 to prevent the leakage of the unfinished solution; Step 4: Dissolution of main agent. Sodium persulfate is added to the interior of the outer shell 2 at a rate of 80 g / L, and is stirred by the stirring assembly 53 to gradually dissolve the sodium persulfate into the base solution; Step 5: Addition of additives. Thiourea is added to the interior of the outer shell 2 as a slow-release agent at a rate of 0.2 g / L, and is stirred at a predetermined time. Subsequently, an appropriate amount of surfactant is added, and stirring is continued. The whole process is controlled below 40 degrees, and then post-treatment is carried out, and finally the preparation of the softening liquid is completed.

[0030] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A stirred tank for IC lead frame soaking softening liquid production, characterized in that: include: A frame body (1), the inner side surface of the frame body (1) being fixedly connected to a shell (2), and the top of the shell (2) being fixedly mounted with a top cover (3); 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 outer shell (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 driving component (52) is fixedly connected to the premixing component (54), the output end of the driving component (52) is drivingly connected to the stirring component (53), and the inner cavity of the premixing component (54) is in communication with the inner cavity of the outer shell (2).

2. The stirring tank for producing IC lead frame soaking softening liquid according to claim 1, characterized in that: A filling pipe (4) is symmetrically arranged 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 outer shell (2), and 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).

3. The stirring tank for producing IC lead frame soaking softening liquid according to claim 2, characterized in that: The stirring assembly (53) comprises a stirring rod (531), the stirring rod (531) being transmission-connected to the output end of the driving assembly (52), and the stirring rod (531) extending into the interior of the housing (2), the surface of the stirring rod (531) being rotationally connected to the inner side surface of the top cover (3), the outer side surface of the stirring rod (531) being slidably connected to the anti-leakage assembly (532), the outer side surface of the anti-leakage assembly (532) being fixedly connected to a stirring blade (533), the stirring blade (533) being arranged in a spiral shape, and the surface of the stirring blade (533) being slidably connected to the inner side surface of the housing (2).

4. The stirring tank for producing IC lead frame soaking softening liquid according to claim 3, characterized in that: The anti-leakage component (532) comprises a slide groove (5322), wherein the slide groove (5322) is provided 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 in a dovetail shape, 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).

5. The stirring tank for producing IC lead frame soaking softening liquid according to claim 4, characterized in that: A sliding rod (5323) is arranged inside the sliding groove (5322), and two ends of the sliding rod (5323) are respectively fixedly connected to two sides of the sliding groove (5322), and the sliding rod (5323) passes through the slider (5324), and the inner side surface of the slider (5324) is slidably connected to the surface of the sliding 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 sliding groove (5322), and the spring (5325) is sleeved on the outside of the sliding rod (5323).

6. The stirring tank for producing IC lead frame soaking softening liquid according to claim 5, characterized in that: The premixing assembly (54) comprises a premixing barrel (541), a connecting pipe (542) being fixedly connected to the bottom of the premixing barrel (541), a portion of the connecting pipe (542) being arranged in a spiral shape, and a spiral section of the connecting pipe (542) being arranged in a flat shape, a fixing plate (543) being fixedly connected to the outer side surface of the premixing barrel (541), an outer side surface of the fixing plate (543) being fixedly connected to the surface of a frame (1), a deionized water pipe (544) being fixedly connected to the outer side surface of the premixing barrel (541), and the deionized water pipe (544) and the connecting pipe (542) being in communication with the premixing barrel (541).

7. The stirring tank for producing IC lead frame soaking softening liquid according to claim 6, characterized in that: A premixing rod (545) is arranged 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 surface of the premixing rod (545), and a plurality of premixing tubes (546) are arranged along the circumference of the premixing rod (545).

8. The stirring tank for producing IC lead frame soaking softening liquid according to claim 7, 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) penetrates 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).

9. The stirring tank for producing IC lead frame soaking softening liquid according to claim 8, characterized in that: The driving assembly (52) comprises a conveyor belt (521), the inner side surface of the conveyor belt (521) being respectively connected to the surfaces of a premixing rod (545) and a stirring rod (531) in a transmission manner; one end of the premixing rod (545) located outside the premixing barrel (541) is fixedly connected to a motor (522), and the output end of the motor (522) is fixedly connected to the premixing rod (545); a side of the mounting plate (51) away from the top cover (3) is fixedly connected to a shield (523), and the shield (523) is arranged outside the conveyor belt (521); the stirring rod (531) and the premixing rod (545) penetrate a 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).

10. A stirring process for producing IC lead frames soaked in softening liquid, using the stirring tank according to claim 1, characterized in that: The following steps are involved: Step 1: pretreatment, preparing deionized water, injecting it into the premixing component (54), and then injecting sulfuric acid, and driving the premixing component (54) to operate by the driving component (52), diluting it at a ratio of 1:5 to obtain a diluted sulfuric acid solution; Step 2, base liquid preparation, deionized water is injected into the housing (2), and the diluted sulfuric acid solution is slowly injected into the housing (2) at a rate of 15 mL / L, while 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 feed pipe (6) to prevent leakage of unfinished solution; Step 4: dissolving the main agent, adding 80 g / L of sodium persulfate into the housing (2), and stirring with a stirring assembly (53) to gradually dissolve the sodium persulfate into the base liquid; Step 5: Add additives. Add thiourea as a slow-release agent into the shell (2) at a rate of 0.2 g / L. Stir for a predetermined period of time. Then add an appropriate amount of surfactant. Continue stirring. Control the entire process at a temperature below 40 degrees. Then perform post-processing to complete the preparation of the softening liquid.

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