Self-cleaning solder paste emulsifying machine

Abstract

The invention relates to the technical field of solder paste production equipment, in particular to a self-cleaning solder paste emulsifying machine which comprises a control box. A U-shaped groove is formed in the left side face of the control box, a stirring barrel with an upward opening is installed on the inner side face of the U-shaped groove, a hydraulic telescopic rod is installed at the upper end of the right side face of the control box, the telescopic end of the hydraulic telescopic rod is connected with an upper cover plate through a connecting plate, and a stirring motor is installed in the middle of the upper surface of the upper cover plate. An output shaft of the stirring motor penetrates through the upper cover plate and is connected with a stirring shaft, at least one L-shaped stirring cutter is mounted at the lower end of the outer side surface of the stirring shaft, and arc-shaped stirring cutters are mounted on the outer side surfaces of the L-shaped stirring cutters; according to the self-cleaning solder paste emulsifying machine, the flexible scraper fixed on the outer side of the L-shaped stirring knife through the bolt is tightly attached to the inner wall of the stirring barrel, residual solder paste is synchronously scraped in the stirring process, the cleaning problem caused by residue solidification of traditional equipment is solved, and the manual maintenance frequency is reduced.

Description

Technical Field

[0001] This application relates to the technical field of solder paste production equipment, and specifically relates to a self-cleaning solder paste emulsifying machine. Background Technique

[0002] Solder paste mainly consists of metal alloy powders (such as Sn-Ag-Cu, Sn-Pb, etc., with a particle size usually of 20-45μm), soldering fluxes (rosin, activator, solvent, thixotropic agent, etc.), and a small amount of additives. When producing solder paste, it is necessary to ensure that its metal particles are evenly dispersed to avoid agglomeration or sedimentation. At the same time, its viscosity stability (usually 100-1200 Pa·s) needs to be ensured to ensure good rheological properties during printing. And there should be no bubble residues to prevent defects such as welding voids. Therefore, a solder paste emulsifying machine is needed during the production of solder paste.

[0003] The solder paste emulsifying machine applies shear force to the solder paste through high-speed rotating stirring blades or centrifugal force to break particle agglomeration. The solder paste produced by existing solder paste emulsifying machines is prone to insufficient viscosity. The reason is that the traditional stirring device cannot stir the solder paste production raw materials efficiently and thoroughly. At the same time, after the production of solder paste is completed, it is difficult to thoroughly clean the stirring blades and the cavity of the remaining solder paste, and frequent manual maintenance is required. This severely restricts the production efficiency of solder paste. Summary of the Invention

[0004] This application provides a self-cleaning solder paste emulsifying machine, which can realize the automatic cleaning of the solder paste emulsifying machine, and can also realize the recycling of tailings. At the same time, the stirring efficiency of this self-cleaning solder paste emulsifying machine is relatively high, which can effectively solve the problems in the background technique.

[0005] To achieve the above object, this application provides the following technical solution: A self-cleaning solder paste emulsifying machine, including a control box; a U-shaped groove is provided on the left side surface of the control box, and a stirring barrel with an upward opening is installed on the inner side surface of the U-shaped groove. The upper end of the right side surface of the control box is installed with a hydraulic telescopic rod, and the telescopic end of the hydraulic telescopic rod is connected with an upper cover plate through a connecting plate. A stirring motor is installed in the middle of the upper surface of the upper cover plate, and the output shaft of the stirring motor passes through the upper cover plate and is connected with a stirring shaft. At least one L-shaped stirring knife is installed at the lower end of the outer side surface of the stirring shaft, and an arc-shaped stirring knife is installed on the outer side surface of the L-shaped stirring knife.

[0006] A stirring motor one and a stirring motor two are installed on the upper surface of the upper cover plate in an inclined manner, and the output shafts of the stirring motor one and the stirring motor two pass through the upper cover plate and are sequentially connected with a stirring paddle one and a stirring paddle two.

[0007] A recycling device is provided on the front side of the mixing barrel. A cleaning device is installed on the upper surface of the recycling device. The recycling device includes a recycling box, which is connected to the lower surface of the mixing barrel through a reflux pipe. An electromagnetic valve is installed on the recycling pipe. A pull-out box is provided inside the recycling box. The cleaning device includes a water tank and a liquid pump. The liquid inlet of the liquid pump is connected to the liquid outlet of the water tank through a conduit, and the liquid outlet of the liquid pump is connected to the lower surface of the mixing barrel through a flushing pipe.

[0008] Preferably, the mixing barrel is rotatably connected to the inner side of the U-shaped groove through a main shaft. The main shaft is fixed to the control box by bolts, and a T-shaped handle is installed at the end of the main shaft.

[0009] Preferably, the number of the hydraulic telescopic rods is two.

[0010] Preferably, the number of the L-shaped mixing blades is two, and the two L-shaped mixing blades are symmetrically arranged on the left and right sides of the mixing shaft.

[0011] Preferably, an L-shaped flexible scraping shovel is fixedly connected to the outer side of the L-shaped mixing blade by bolts, and the L-shaped flexible scraping shovel is arranged close to the inner side of the mixing barrel.

[0012] Preferably, the mixing paddle two is perpendicular to the output shaft of the mixing motor two, and the mixing paddle one is a spiral-shaped blade.

[0013] Preferably, a temperature sensor is installed on the upper cover plate, and an electric heating wire is installed inside the mixing barrel.

[0014] Preferably, the upper end of the pull-out box is open. The pull-out box is connected to the inner side of the recycling box through a pull-out guide rail. An electric heating wire is provided inside the pull-out box, and an air outlet is provided at the upper end of the outer side of the recycling box.

[0015] Preferably, a liquid filling port is provided at the upper end of the outer side of the water tank.

[0016] Preferably, a support plate is slidably connected to the lower end of the inner side of the U-shaped groove. A handle is provided on the outer side of the support plate. Support legs are provided on the lower surface of the support plate, and universal wheels are installed on the support legs.

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] 1. The flexible scraping shovel fixed to the outside of the L-shaped mixing blade by bolts of this self-cleaning solder paste emulsifying machine is close to the inner wall of the mixing barrel, and residual solder paste is scraped synchronously during the mixing process, solving the cleaning problem caused by the solidification of residues in traditional equipment and reducing the frequency of manual maintenance;

[0019] 2. The liquid pump connects the water tank and the flushing pipe, and can automatically inject the cleaning liquid into the stirring barrel. Combined with the rotation of the stirring shaft, it realizes automatic flushing, avoiding solvent waste and secondary pollution. The recycling box is connected to the stirring barrel through the reflux pipe. The pull-out box body can collect the residual solder paste or the tailings that have not been drained after cleaning. After being dried with the electric heating wire, it can be reused, reducing material loss.

[0020] 3. The combination of the L-shaped stirring knife and the arc-shaped stirring knife enhances the shear force distribution. The spiral linear stirring paddle one can generate an axial eddy current, promoting three-dimensional convective mixing and reducing dead corners. The combination of stirring motor one and stirring motor two realizes the superposition of shear forces in different directions, accelerating the dispersion speed of metal particles and shortening the mixing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present application;

[0022] Figure 2 is the front view of the present application;

[0023] Figure 3 is the right view of the present application;

[0024] Figure 4 is the left view of the present application.

[0025] In the figure: 1 stirring barrel, 2 temperature sensor, 3 stirring motor, 4 upper cover plate, 5 connecting plate, 6 hydraulic telescopic rod, 7 control box, 8 water tank, 9 liquid filling port, 10 air outlet, 11 recycling box, 12 main shaft, 13 T-shaped handle, 14 stirring paddle one, 15 stirring motor one, 16 L-shaped flexible scraping shovel, 17 pull-out box body, 18 liquid pump, 19 stirring paddle two, 20 stirring motor two, 21 support plate, 22 handle, 23 universal wheel, 24 stirring shaft, 25 arc-shaped stirring knife, 26 L-shaped stirring knife. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0027] In the description of the present application, if it involves orientation description, such as "upper", "lower", "front", "rear", "left", "right", etc., the indicated orientation or positional relationship is based on the attached Figure 2The orientation or positional relationship shown is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. When a feature is referred to as "arranged", "fixed", or "connected" to another feature, it can be directly arranged, fixed, or connected to the other feature, or indirectly arranged, fixed, or connected to the other feature.

[0028] Please refer to Figures 1-4 The present application provides the following technical solution: a self-cleaning solder paste emulsifying machine, including a control box 7; a U-shaped groove is provided on the left side surface of the control box 7, and a stirring barrel 1 with an upward opening is installed on the inner side surface of the U-shaped groove. The upper end of the right side surface of the control box 7 is installed with a hydraulic telescopic rod 6, and the telescopic end of the hydraulic telescopic rod 6 is connected with an upper cover plate 4 through a connecting plate 5. A stirring motor 3 is installed in the middle of the upper surface of the upper cover plate 4. The output shaft of the stirring motor 3 passes through the upper cover plate 4 and is connected with a stirring shaft 24. At least one L-shaped stirring blade 26 is installed at the lower end of the outer side surface of the stirring shaft 24, and an arc-shaped stirring blade 25 is installed on the outer side surface of the L-shaped stirring blade 26.

[0029] Specifically, a PLC single-chip microcomputer is installed inside the control box 7; the U-shaped groove is designed to fix the stirring barrel 1 while reserving a rotation adjustment space to avoid the problem of easy deformation of the rigid connection of the traditional welding bracket; the combined design of the L-shaped stirring blade 26 and the arc-shaped stirring blade 25 forms a multi-directional shear flow field (radial + axial) under centrifugal force, improving the dispersion efficiency of metal particles; the arc-shaped blade can reduce the stirring resistance and reduce the motor load; the hydraulic telescopic rod 6 drives the upper cover plate 4 to be tightly pressed and sealed to prevent the solder paste from splashing or the flux from volatilizing and polluting the environment during high-speed stirring, which is superior to the sealing reliability of the traditional manual locking.

[0030] More specifically, a vacuum extraction port is reserved on the upper surface of the upper cover plate 4. The vacuum extraction port is connected to the intake port of an external vacuum pump through a conduit. When stirring and mixing the solder paste, the inside of the stirring barrel 1 can be vacuumed as needed, which can effectively prevent the solder paste from oxidizing during processing. A sealing ring is provided at the edge of the lower surface of the upper cover plate 4, and a sandwich layer is provided inside the stirring barrel 1, and an electric heating wire is provided in the sandwich layer.

[0031] A stirring motor one 15 and a stirring motor two 20 are installed on the upper surface of the upper cover plate 4 in an inclined manner. The output shafts of the stirring motor one 15 and the stirring motor two 20 pass through the upper cover plate 4 and are sequentially connected with a stirring paddle one 14 and a stirring paddle two 19.

[0032] Specifically, a stirring motor 15 drives a spiral stirring paddle 14 to generate a vertical downward vortex to promote the axial movement of the material; a stirring motor 20 drives a vertically arranged stirring paddle 19 to enhance radial shear force, and the dual power synergy breaks the limitations of traditional single-direction mixing and reduces stirring dead angles; the tilted motor can lower the center of gravity and reduce vibration and noise; independent motor control allows on-demand start and stop, saving energy.

[0033] A recovery device is provided on the front side of the mixing barrel 1, and a cleaning device is installed on the upper surface of the recovery device. The recovery device includes a recovery box 11, and the recovery box 11 is connected to the lower surface of the mixing barrel 1 through a reflux pipe. A solenoid valve is installed on the recovery pipe. A pull-out box body 17 is provided inside the recovery box 11. The cleaning device includes a water tank 8 and a liquid pump 18. The liquid inlet of the liquid pump 18 is connected to the liquid outlet of the water tank 8 through a conduit, and the liquid outlet of the liquid pump 18 is connected to the lower surface of the mixing barrel 1 through a flushing pipe, and an electric-controlled valve is installed on the flushing pipe.

[0034] Specifically, the liquid pump 18 is used for pressurized flushing and the electromagnetic valve is used to control the reflux, so as to realize the recycling of the cleaning liquid and reduce the solvent consumption; the pull-out box 17 can collect the residual solder paste after flushing and directly reuse it after drying it with an electric heating wire, so as to solve the cost problem caused by the solidification and waste of tail materials in traditional equipment; the independent cleaning device and the recycling pipeline can avoid the mixing of different batches of solder paste, which is particularly suitable for multi-formula production scenarios. The electric control valve and the electromagnetic valve are both installed close to the lower surface of the mixing barrel 1.

[0035] Preferably, the mixing barrel 1 is rotatably connected to the inner side surface of the U-shaped groove through a main shaft 12 , the main shaft 12 is fixed to the control box 7 by bolts, and a T-shaped handle 13 is installed at the end of the main shaft 12 .

[0036] Specifically, the mixing barrel 1 can be manually rotated to an inclined angle through the T-shaped handle 13 to facilitate the discharge of materials or the complete outflow of cleaning liquid, thereby avoiding residues in the traditional fixed barrel body; the mixing barrel 1 can be disassembled by loosening the bolts to adapt to barrel bodies of different capacities or materials, thereby improving the compatibility of the equipment.

[0037] Preferably, the number of the hydraulic telescopic rods 6 is two.

[0038] Specifically, the double hydraulic rods are symmetrically distributed to ensure that the upper cover plate 4 is evenly stressed, thereby preventing poor sealing or deformation of the cover plate caused by unilateral pressure; sharing the load can reduce the working intensity of a single hydraulic rod and extend its service life.

[0039] Preferably, the number of the L-shaped stirring blades 26 is two, and the two L-shaped stirring blades 26 are symmetrically arranged on the left and right sides of the stirring shaft 24 .

[0040] Specifically, the symmetrical layout offsets the centrifugal force of rotation, reduces bearing load and equipment vibration, and has less noise compared to asymmetrical designs; the double blades form staggered shear areas to improve the mixing efficiency of high-viscosity solder paste.

[0041] Preferably, the outer side surface of the L-shaped mixing blade 26 is fixedly connected to an L-shaped flexible scraper 16 by bolts, and the L-shaped flexible scraper 16 is arranged close to the inner side surface of the mixing barrel 1.

[0042] Specifically, the flexible scraper is made of silicone material, which can scrape off the attachments on the barrel wall in real time as the stirring shaft rotates, solving the problem of lumps that are difficult to clean after traditional equipment is shut down. The flexible material can compensate for processing errors or barrel deformation, ensure long-term fit, and avoid wear of the barrel wall by the metal scraper.

[0043] Preferably, the stirring paddle 19 is vertically arranged to the output shaft of the stirring motor 20, and the stirring paddle 14 is a spiral blade.

[0044] Specifically, propeller 14 pushes the material to circulate up and down, and vertical propeller 2 19 enhances radial diffusion to form three-dimensional turbulence, thereby greatly improving mixing uniformity; the spiral structure can lift the metal particles precipitated at the bottom, avoiding the "laminar stratification" defect of traditional flat propellers.

[0045] Preferably, a temperature sensor 2 is installed on the upper cover plate 4 , and an electric heating wire is installed inside the mixing barrel 1 .

[0046] Specifically, the temperature sensor 2 monitors the temperature in the barrel in real time, adjusts the power of the electric heating wire through the PID algorithm, maintains the active temperature of the flux, and prevents a sudden increase in low-temperature viscosity or high-temperature volatilization; the temperature control module ensures that the rheological properties of different batches of solder paste are consistent, reducing printing defects.

[0047] Preferably, the upper end of the pull-out box 17 is open, the pull-out box 17 is connected to the inner side of the recovery box 11 through a pull-out guide rail, an electric heating wire is provided inside the pull-out box 17, and an air outlet 10 is provided on the upper end of the outer surface of the recovery box 11.

[0048] Specifically, the pull-out guide rail supports the rapid replacement of the box, and the waste material can be processed without interrupting production, thereby improving the utilization rate of the equipment; the air outlet 10 can be externally connected to a waste gas treatment device to avoid direct discharge of volatile gases of the flux; the electric heating wire is dried at a low temperature to prevent oxidation of the waste material.

[0049] Preferably, a liquid filling port 9 is provided at the upper end of the outer side surface of the water tank 8 .

[0050] Specifically, the liquid filling port 9 supports direct injection of cleaning agent or deionized water without disassembling the water tank, thereby reducing the complexity of maintenance; the liquid filling port can be equipped with a filter to prevent impurities from entering the flushing pipeline and clogging the nozzle.

[0051] Preferably, a support plate 21 is slidably connected to the lower end of the inner side surface of the U-shaped groove. A handle 22 is provided on the outer side surface of the support plate 21, and support legs are provided on the lower surface of the support plate 21. Universal wheels 23 are installed on the support legs.

[0052] Specifically, the universal wheels 23 and the slidable support plate 21 enable the device to be quickly pulled out for placing the material receiving bucket.

[0053] During use: Connect the power supply of the control box 7, and set the stirring parameters through the control panel: select according to the viscosity of the solder paste. Set the target temperature through the temperature sensor 2. Check whether the hydraulic telescopic rod 6 can extend and retract normally to ensure that the sealing ring of the upper cover plate 4 is not damaged.

[0054] Operate the hydraulic telescopic rod 6 to raise the upper cover plate 4, and pour the premixed metal powder and flux into the stirring barrel 1 according to the formula ratio. Close the upper cover plate 4, start the hydraulic telescopic rod 6 to press tightly to ensure the sealing performance. If it is necessary to add low-temperature solder paste (LTS), preheat the electric heating wire to below 20 °C in advance.

[0055] Drive the L-shaped stirring blade 26 and the arc-shaped stirring blade 25 to perform basic shear mixing. The propeller 14 pushes the material to circulate axially to prevent bottom precipitation. The vertical paddle 2 enhances radial diffusion to improve uniformity.

[0056] After the stirring is completed, stop all motors, control the hydraulic telescopic rod 6 to extend to move the stirring tool away, and operate the T-shaped handle 13 to rotate the stirring barrel 1 to an inclined angle so that the solder paste flows along the barrel wall into the material receiving container.

[0057] After discharging, start the cleaning program through the control box 7: The liquid pump 18 pressurizes the cleaning liquid in the water tank 8 and injects it into the stirring barrel 1, and the liquid level covers the stirring blades.

[0058] Start the stirring motor 3 to drive the L-shaped flexible scraper 16 to scrape the barrel wall for 5-10 minutes. The cleaning liquid returns to the pull-out box 17 inside the recycling box 11 through the return pipe. Start the electric heating wire in the pull-out box 17 to dry the moisture to obtain the solder paste tailings. Take out the box and put the tailings back into the stirring barrel 1 for recycling. If the tailings are severely oxidized, they need to be cleaned according to the waste treatment specifications. After the cleaning is completed, turn on the electric heating wire in the stirring barrel 1 to dry the remaining moisture inside.

[0059] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning solder paste emulsifier, characterized in that: The invention comprises a control box (7); a U-shaped groove is provided on the left side of the control box (7); a stirring barrel (1) with an opening facing upward is installed on the inner side of the U-shaped groove; a hydraulic telescopic rod (6) is installed on the upper end of the right side of the control box (7); the telescopic end of the hydraulic telescopic rod (6) is connected to an upper cover plate (4) via a connecting plate (5); a stirring motor (3) is installed on the middle part of the upper surface of the upper cover plate (4); the output shaft of the stirring motor (3) passes through the upper cover plate (4) and is connected to a stirring shaft (24); at least one L-shaped stirring blade (26) is installed on the lower end of the outer side of the stirring shaft (24); an arc-shaped stirring blade (25) is installed on the outer side of the L-shaped stirring blade (26); The upper surface of the upper cover plate (4) is provided with an inclined stirring motor 1 (15) and a stirring motor 2 (20), and the output shafts of the stirring motor 1 (15) and the stirring motor 2 (20) pass through the upper cover plate (4) and are connected to stirring paddle 1 (14) and stirring paddle 2 (19) in sequence; A recovery device is provided on the front side of the mixing barrel (1), and a cleaning device is installed on the upper surface of the recovery device. The recovery device comprises a recovery box (11), and the recovery box (11) is connected to the lower surface of the mixing barrel (1) through a reflux pipe, and a solenoid valve is installed on the recovery pipe. A pull-out box body (17) is provided inside the recovery box (11). The cleaning device comprises a water tank (8) and a liquid pump (18), and the liquid inlet of the liquid pump (18) is connected to the liquid outlet of the water tank (8) through a conduit, and the liquid outlet of the liquid pump (18) is connected to the lower surface of the mixing barrel (1) through a flushing pipe.

2. The self-cleaning solder paste emulsifier according to claim 1, characterized in that: The mixing barrel (1) is rotatably connected to the inner side surface of the U-shaped groove via a main shaft (12); the main shaft (12) is fixed to the control box (7) via bolts; a T-shaped handle (13) is installed at the end of the main shaft (12).

3. The self-cleaning solder paste emulsifier according to claim 1, characterized in that: The number of the hydraulic telescopic rods (6) is two.

4. The self-cleaning solder paste emulsifier according to claim 1, characterized in that: The number of the L-shaped stirring blades (26) is two, and the two L-shaped stirring blades (26) are symmetrically arranged on the left and right sides of the stirring shaft (24).

5. The self-cleaning solder paste emulsifier according to claim 4, characterized in that: The outer side surface of the L-shaped stirring blade (26) is fixedly connected to an L-shaped flexible scraper (16) via bolts, and the L-shaped flexible scraper (16) is arranged closely against the inner side surface of the stirring barrel (1).

6. The self-cleaning solder paste emulsifier according to claim 1, characterized in that: The second stirring paddle (19) is arranged perpendicularly to the output shaft of the second stirring motor (20), and the first stirring paddle (14) is a spiral blade.

7. The self-cleaning solder paste emulsifier according to claim 1, characterized in that: A temperature sensor (2) is installed on the upper cover plate (4), and an electric heating wire is installed inside the mixing barrel (1).

8. The self-cleaning solder paste emulsifier according to claim 1, characterized in that: The upper end of the pull-out box body (17) is open, and the pull-out box body (17) is connected to the inner side of the recovery box (11) via a pull-out guide rail, and an air outlet (10) is provided at the upper end of the outer side surface of the recovery box (11).

9. The self-cleaning solder paste emulsifier according to claim 1, characterized in that: A liquid filling port (9) is provided at the upper end of the outer side surface of the water tank (8).

10. The self-cleaning solder paste emulsifier according to claim 1, characterized in that: A support plate (21) is slidably connected to the lower end of the inner side surface of the U-shaped groove, a handle (22) is provided on the outer side surface of the support plate (21), and a support leg is provided on the lower surface of the support plate (21), and a universal wheel (23) is mounted on the support leg.

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