A low-migration high-stability high-purity silver conductive paste premixing device

Abstract

The application relates to the technical field of silver conductive paste preparation, in particular to a high-purity silver conductive paste premixing device with low migration and high stability, which solves the problem that the silver powder cannot be uniformly wetted due to the improper discharging mode, which leads to the isolation state of dry powder wrapping wet material, and finally reduces the quality of the silver conductive paste, the discharging assembly and the lump-eliminating assembly are arranged on the kettle cover, the discharging assembly is driven to rotate and lift by airflow, the silver powder is uniformly discharged in a ring shape and is accelerated to be discharged, the conical plate of the lump-eliminating assembly is matched with the internally tangent ring and the externally tangent ring rotating in the opposite direction, the cutting plate and the cutting knife are used to disperse the lumped materials, the materials are further dispersed by centrifugal force to the kettle wall, the stirring rod and the grinding rod of the stirring assembly are used for fully mixing, the air extraction pipe is connected with a vacuum pump to realize vacuum defoaming, the overall structure avoids material agglomeration, uniformly disperses the silver powder, inhibits ion migration, and improves the premixing quality of the paste.

Description

A premixing device for high-purity silver conductive paste with low migration and high stability. Technical Field

[0001] This invention relates to the field of silver conductive paste preparation technology, and in particular to a high-purity silver conductive paste premixing device with low migration and high stability. Background Technology

[0002] The preparation of silver conductive paste involves mixing ultrafine silver powder, organic carriers, and additives in a specific ratio, followed by stirring and grinding to form a uniform paste. In existing processes, this paste serves as a key conductive medium, primarily used to form circuits or electrodes on substrates via methods such as screen printing. After subsequent drying or sintering, the paste solidifies into a conductive layer, widely applied in solar cells, thick-film circuits, and electronic components to achieve efficient current transmission and reliable connections between components. It is an indispensable basic material in modern electronics manufacturing.

[0003] Chinese patent application CN118988036A discloses a high-viscosity carbon nanotube conductive slurry premixing device and its premixing method. The device includes a premixing tank and a premixing rod that is rotatably and vertically mounted within the tank. A lifting rod is located on one side of the tank, and a top cover is fixed to the telescopic end of the lifting rod, positioned above the tank and the rod. The device also includes a splash guard fixed to the side of the top cover near the tank and located outside the rod; and a feeding section extending through the splash guard. This invention, by incorporating the splash guard and feeding section, allows the splash guard to store different premixed materials and prevent splashing. A pulling component within the feeding section pulls a shifting component, which, with the aid of an opening component, opens the corresponding opening in the splash guard, allowing the premixed material to be discharged into the tank. This design enables the phased and timed addition of premixed material, improving equipment lifespan and stability while reducing production costs.

[0004] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: Existing methods all involve directly adding silver powder into a liquid medium and stirring it, which results in a dry powder coating wet material in an isolated state during the initial stirring stage. This prevents the silver powder from being evenly wetted by the liquid, thus forming hard agglomerates, which reduces the quality of the silver conductive paste. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing technology has the disadvantage of forming a dry powder-wet material separation state due to improper feeding method, which makes it impossible for silver powder to be uniformly wetted, and ultimately reduces the quality of silver conductive paste. To this end, we propose a high-purity silver conductive paste premixing device with low migration and high stability.

[0006] To achieve the above objectives, this application adopts the following technical solution: a premixing device for high-purity silver conductive paste with low migration and high stability, including a mixing vessel, a vessel cover is provided above the mixing vessel, a feeding component for feeding is provided inside the vessel cover, and an anti-agglomeration component for solving material agglomeration is fixedly installed on the lower surface of the vessel cover.

[0007] The agglomeration elimination component includes a fixing ring fixedly installed on the lower surface of the vessel lid, a support rod fixedly installed on the lower surface of the fixing ring, a Z-shaped plate fixedly installed at one end of the support rod, a base plate fixedly installed at one end of the Z-shaped plate, a stirring component for stirring materials fixedly installed on the upper surface of the base plate, and a centrifugal component for dispersing and preventing agglomeration at the output end of the stirring component.

[0008] The centrifugal assembly includes a conical plate disposed at the output end of the stirring assembly. An inner tangent ring is movably disposed on the outer surface of the conical plate, and an outer tangent ring is movably disposed on the outer surface of the inner tangent ring. The feeding assembly is located directly above the centrifugal assembly.

[0009] Preferably, a large gear is fixedly installed on the lower surface of the conical plate, and the large gear is fixedly connected to the stirring assembly. A middle gear is also provided below the conical plate. An internal tooth is fixedly installed on the inner wall of the inner tangent ring, and the internal tooth meshes with the middle gear. The inner tangent ring meshes with the middle gear. There are four sets of Z-shaped plates. One set of Z-shaped plates has a middle gear movably installed on its upper surface. Another set of Z-shaped plates has a motor A fixedly installed inside. A small gear is provided at the output end of motor A. A lower tooth is fixedly installed on the lower surface of the outer tangent ring, and the lower tooth meshes with the small gear. Cutting plates are fixedly installed on the surfaces of both the inner and outer tangent rings.

[0010] Preferably, there are multiple cutting plates, which are divided into two groups. The two groups of cutting plates are set in a mirror image, and each of the two groups of cutting plates has multiple sets of cutting blades on one side, with the multiple sets of cutting blades arranged alternately.

[0011] Preferably, the stirring assembly includes a bidirectional motor fixedly mounted on the upper surface of the chassis. The bidirectional motor has two sets of output ends. One set of output ends is fixedly mounted on the lower surface of the large gear, and the other set of output ends is fixedly mounted on a rotating shaft. A top pipe is fixedly mounted on the lower surface of the chassis. A stirring rod is fixedly mounted on the outer surface of the rotating shaft. A stirring rod is also fixedly mounted on the outer surface of the top pipe. Multiple grinding rods are fixedly mounted on the outer surface of each stirring rod. The grinding rods are staggered. A fixed pipe is fixedly mounted at the bottom of the mixing vessel. A horizontal pipe is fixedly mounted on the outer surface of the fixed pipe. Grinding rods are also fixedly mounted on the outer surface of the horizontal pipe.

[0012] Preferably, an extraction pipe is fixedly installed on the outer surface of the mixing vessel, and an inclined plate is fixedly installed at the bottom of the mixing vessel. The extraction pipe is connected to a vacuum pump.

[0013] Preferably, the feeding assembly includes a storage ring disposed inside the vessel lid, a side rod fixedly installed on the outer surface of the storage ring, a blade fixedly installed at one end of the side rod, a movable ring movably disposed inside the storage ring, a flexible hose fixedly installed on the upper surface of the movable ring, an inlet pipe fixedly installed at one end of the flexible hose, a material pipe connected to one end of the inlet pipe, a feeding pipe fixedly installed on the storage ring, and a feeding port opened at the bottom of the feeding pipe.

[0014] Preferably, an infusion pipe is fixedly installed on the surface of the vessel lid, and the infusion pipe is connected to the material chamber. An air port is opened through the outer surface of the vessel lid, and an air pipe is connected to the air port. An annular groove is opened inside the vessel lid, and the material storage ring and the material discharge pipe are movably connected inside the annular groove. A plate groove and a rod groove are also opened inside the vessel lid. The plate groove, rod groove, and annular groove are connected to the air port. The blade is located inside the plate groove, and the side rod is located inside the rod groove.

[0015] Preferably, a triangular plate B is fixedly installed on the lower surface of the storage ring, and a triangular plate A is fixedly installed at the bottom of the ring groove, with the triangular plate B and the triangular plate A being compatible.

[0016] Preferably, the support rod is teardrop-shaped.

[0017] Preferably, both the inner tangent ring and the outer surface of the conical plate are provided with T-grooves, and bolts are provided inside the inner tangent ring and the outer tangent ring. A T-tube is fixedly installed at one end of the bolt, and a roller is provided on the outer surface of the T-tube. The bolts are rotatably connected to the inner tangent ring and the outer tangent ring.

[0018] The technical effects and advantages of this invention are as follows:

[0019] In this invention, when silver conductive paste needs to be produced, an organic carrier is first injected through the infusion pipe of the kettle lid. Then, silver powder is added to the storage ring through the feed pipe. Gas is introduced through the air inlet to drive the blades to rotate. The storage ring is rotated and raised by triangular plates A and B, so that the silver powder falls annularly onto the conical plate surface of the centrifugal assembly through the feed pipe and feed port. Subsequently, the bidirectional motor of the stirring assembly is started, driving the conical plate to rotate. The large gear drives the inner tangent ring to rotate in the opposite direction through the middle gear, and motor A drives the outer tangent ring to rotate in the same direction. The cutting plate and cutting blade disperse the agglomerated material. The material is further dispersed by the centrifugal force hitting the inner wall of the mixing kettle. At the same time, the bidirectional motor drives the stirring rod and grinding rod to stir. The vacuum pump connected to the air extraction pipe removes air bubbles. The teardrop-shaped support rod does not obstruct the material from being thrown out. Finally, the premixing is completed, which inhibits the migration of silver conductive paste ions, thereby improving the low migration of silver conductive paste and ultimately improving the quality of silver conductive paste. Attached Figure Description

[0020] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a schematic diagram of the overall internal structure of the present invention;

[0023] Figure 3 is a schematic diagram of the overall disassembled structure of the present invention;

[0024] Figure 4 is a schematic diagram of the disassembled structure of the anti-clumping component of the present invention;

[0025] Figure 5 is a schematic diagram of the disassembled structure of the centrifugal assembly of the present invention;

[0026] Figure 6 is a partial structural diagram of the combination of the inner and outer tangent rings of the present invention;

[0027] Figure 7 is a schematic diagram of the cutting plate structure of the present invention;

[0028] Figure 8 is a schematic diagram of the stirring assembly structure of the present invention;

[0029] Figure 9 is a schematic diagram of the fit between the pinion and the outer tangent ring of the present invention;

[0030] Figure 10 is a schematic diagram of the internal structure of the kettle lid and feeding assembly of the present invention;

[0031] Figure 11 is a partial structural diagram of the feeding assembly of the present invention.

[0032] Legend: 1. Mixing vessel; 11. Evacuation pipe; 12. Inclined plate; 13. Fixed pipe; 14. Horizontal pipe; 2. Vessel lid; 21. Infusion pipe; 22. Gas port; 23. Ring groove; 24. Plate groove; 25. Rod groove; 26. Triangle plate A; 3. Feeding assembly; 31. Storage ring; 32. Side rod; 33. Blade; 34. Movable ring; 35. Feeding pipe; 36. Feeding port; 37. Flexible hose; 38. Inlet pipe; 39. Triangle plate B; 4. Agglomeration assembly; 41. Fixed ring; 42. Support rod; 421. Z-shaped plate; 4211, Motor A; 4212, Pinion; 422, Medium Gear; 423, Chassis; 43, Centrifugal Assembly; 431, Conical Plate; 432, Large Gear; 433, Inner Ring; 434, Outer Ring; 435, Cutting Plate; 4351, Cutting Blade; 436, Internal Gear; 437, Lower Gear; 44, Stirring Assembly; 441, Bidirectional Motor; 442, Shaft; 443, Stirring Rod; 444, Grinding Rod; 445, Top Pipe; 45, T-groove; 46, Bolt; 461, T-tube; 462, Roller. Detailed Implementation

[0033] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0034] Referring to Figure 1, the present invention provides a technical solution: a premixing device for high-purity silver conductive paste with low migration and high stability, including a mixing vessel 1, a vessel cover 2 is provided above the mixing vessel 1, a feeding component 3 for feeding is provided inside the vessel cover 2, and an anti-agglomeration component 4 for solving material agglomeration is fixedly installed on the lower surface of the vessel cover 2.

[0035] The agglomeration component 4 includes a fixing ring 41 fixedly installed on the lower surface of the vessel lid 2, a support rod 42 fixedly installed on the lower surface of the fixing ring 41, a Z-shaped plate 421 fixedly installed at one end of the support rod 42, a base plate 423 fixedly installed at one end of the Z-shaped plate 421, a stirring component 44 for stirring materials fixedly installed on the upper surface of the base plate 423, and a centrifugal component 43 for dispersing and discharging materials to prevent agglomeration at the output end of the stirring component 44.

[0036] The centrifugal assembly 43 includes a conical plate 431 disposed at the output end of the stirring assembly 44. An inner tangent ring 433 is movably disposed on the outer surface of the conical plate 431, and an outer tangent ring 434 is movably disposed on the outer surface of the inner tangent ring 433. The feeding assembly 3 is located directly above the centrifugal assembly 43. Through the feeding of the feeding assembly 3 and the rotation of the centrifugal assembly 43, the material can be fed along the surface of the conical plate 431 when it comes into contact with it, allowing the material to undergo initial mixing on the surface of the conical plate 431. Then, the rotating inner tangent ring 433 and outer tangent ring 434 can disperse the agglomerated material, thereby improving the dispersion uniformity. Subsequently, since the conical plate 431 is rotating and the material is on the surface of the outer tangent ring 434, which is located at the outermost edge of the rotating body, the linear velocity reaches its peak at this position, and the material achieves maximum dispersion at this location. With a large inertial impulse, the centrifugal force on the material increases, causing it to impact the inner wall of mixing vessel 1. This further disperses any remaining agglomerates and allows the unagglomerated material to mix thoroughly. Upon impact with the vessel wall, the kinetic energy is instantly converted into powerful shear force and shock wave, which not only forcibly tears and pulverizes the remaining tiny agglomerates but also allows the material to overcome the surface tension and viscous resistance of the liquid, forcefully penetrating the liquid surface and entering the interior of the liquid. This ensures thorough mixing of the material and the liquid. Under the dual action of centrifugal force and impact force, the silver powder particles achieve uniform distribution at the microscopic level, eliminating local enrichment or void defects caused by agglomeration. This results in a dense and stable rheological structure in the slurry during the premixing stage, thus completely suppressing ion migration in the silver conductive slurry and ultimately improving the premixing quality of the silver conductive slurry.

[0037] Referring to Figures 1-11, in this embodiment: a large gear 432 is fixedly installed on the lower surface of the conical plate 431, and the large gear 432 is fixedly connected to the stirring assembly 44. A medium gear 422 is also provided below the conical plate 431. An internal tooth 436 is fixedly installed on the inner wall of the inner tangent ring 433, and the internal tooth 436 meshes with the medium gear 422. The inner tangent ring 433 meshes with the medium gear 422. Four sets of Z-shaped plates 421 are provided. One set of Z-shaped plates 421 has a medium gear 422 movably installed on the upper surface. Another set of Z-shaped plates 421 has a motor A4211 fixedly installed inside. A small gear 4212 is provided at the output end of the motor A4211. A lower tooth 437 is fixedly installed on the lower surface of the outer tangent ring 434. The lower tooth 437 meshes with the pinion 4212. Cutting plates 435 are fixedly installed on the surfaces of the inner ring 433 and the outer ring 434. When the conical plate 431 starts to rotate, the large gear 432 will drive the inner ring 433 to rotate through the middle gear 422. At this time, the conical plate 431 rotates clockwise, and the inner ring 433 will rotate counterclockwise. The motor A4211 will start and drive the pinion 4212 to drive the outer ring 434 to rotate together. At this time, the conical plate 431 and the outer ring 434 will rotate clockwise, while the inner ring 433 will rotate counterclockwise. The outer ring 434 and the inner ring 433 will cut and disperse the clumped slurry through the cooperation of the cutting plate 435 with the opposite rotation direction.

[0038] Multiple cutting plates 435 are provided, and the multiple cutting plates 435 are divided into two groups. The two groups of cutting plates 435 are arranged in a mirror image. Multiple cutting blades 4351 are provided on one side of each group of cutting plates 435. The multiple cutting blades 4351 are arranged in an alternating manner. When the clumped slurry flows to the surface of the inner cutting ring 433 and the outer cutting ring 434, it will be dispersed by the cutting plates 435 rotating in opposite directions. After being dispersed, the clumped slurry will be further dispersed by the cutting blades 4351.

[0039] The stirring assembly 44 includes a bidirectional motor 441 fixedly mounted on the upper surface of the chassis 423. The bidirectional motor 441 has two sets of output ends. One set of output ends is fixedly mounted on the lower surface of the large gear 432, and the other set of output ends is fixedly mounted on a rotating shaft 442. A top pipe 445 is fixedly mounted on the lower surface of the chassis 423. A stirring rod 443 is fixedly mounted on the outer surface of the rotating shaft 442. A stirring rod 443 is also fixedly mounted on the outer surface of the top pipe 445. Multiple sets of grinding wheels are fixedly mounted on the outer surface of each stirring rod 443. The rods 444 and grinding rods 444 are staggered. A fixed pipe 13 is fixedly installed at the bottom of the mixing tank 1. A horizontal pipe 14 is fixedly installed on the outer surface of the fixed pipe 13. Grinding rods 444 are also fixedly installed on the outer surface of the horizontal pipe 14. The rotation of the rotating shaft 442 drives the stirring rod 443 to mix the materials inside the mixing tank 1. The horizontal pipe 14 with a fixed direction and the stirring rod 443 on the outer surface of the top pipe 445 can cooperate with the rotating stirring rod 443 to further resolve the agglomerated slurry.

[0040] An air extraction pipe 11 is fixedly installed on the outer surface of the mixing vessel 1, and an inclined plate 12 is fixedly installed at the bottom of the mixing vessel 1. The air extraction pipe 11 is connected to a vacuum pump. By setting the air extraction pipe 11, air inside the mixing vessel 1 can be extracted during the stirring step. The air bubbles generated during the stirring of the slurry can be removed by vacuum degassing technology, thereby improving the purity of the slurry.

[0041] The feeding assembly 3 includes a storage ring 31 disposed inside the vessel lid 2. A side rod 32 is fixedly installed on the outer surface of the storage ring 31, and a blade 33 is fixedly installed at one end of the side rod 32. A movable ring 34 is movably disposed inside the storage ring 31. A hose 37 is fixedly installed on the upper surface of the movable ring 34. An inlet pipe 38 is fixedly installed at one end of the hose 37. A material pipe is connected to one end of the inlet pipe 38. A feeding pipe 35 is fixedly installed on the storage ring 31. A feeding port 36 is opened at the bottom of the feeding pipe 35. Through the material pipe connected to the inlet pipe 38 and the movable ring 34, silver powder can be added evenly inside the feeding pipe 35. The silver powder is then fed through the feeding port 36. Since the storage ring 31 is rotatable, the silver powder will be fed in a ring shape, allowing the silver powder to fall onto the surface of the conical plate 431 and combine with the liquid.

[0042] An infusion pipe 21 is fixedly installed on the surface of the vessel lid 2, and the infusion pipe 21 is connected to the material chamber. An air port 22 is opened through the outer surface of the vessel lid 2, and an air pipe is connected to the air port 22. An annular groove 23 is opened inside the vessel lid 2. The material storage ring 31 and the material discharge pipe 35 are movably connected inside the annular groove 23. A plate groove 24 and a rod groove 25 are also opened inside the vessel lid 2. The plate groove 24, rod groove 25, and annular groove 23 are connected to the air port 22. The blade 33 is located inside the plate groove 24, and the side rod 32 is located inside the rod groove 25. An air pipe is connected to the air port 22. When the material is discharged, the gas is blown from one end of the air port 22 to the other end. At this time, the blade 33 will be driven by the airflow and rotate, so that the material discharge pipe 35 is filled with silver powder and the silver powder fully fills the material discharge pipe 35.

[0043] A triangular plate B39 is fixedly installed on the lower surface of the storage ring 31, and a triangular plate A26 is fixedly installed at the bottom of the ring groove 23. The triangular plate B39 and the triangular plate A26 are compatible. When the storage ring 31 starts to rotate, the storage ring 31 will rotate up and down through the triangular plate B39 and the triangular plate A26. At this time, the blade 33 will be located inside the plate groove 24 and the air port 22 and move up and down. The discharge pipe 35 will move up and down repeatedly to accelerate the discharge of silver powder inside, thereby increasing the discharge speed.

[0044] The support rod 42 is teardrop-shaped. Due to its teardrop shape, when the slurry is thrown out and comes into contact with the support rod 42, the slurry will continue to hit the mixing vessel 1 along the surface of the support rod 42. The teardrop design will not hinder the effect of throwing out the slurry.

[0045] Both the inner tangent ring 433 and the outer surface of the conical plate 431 are provided with T-grooves 45. Bolts 46 are provided inside the inner tangent ring 433 and the outer tangent ring 434. A T-tube 461 is fixedly installed at one end of the bolt 46. A roller 462 is provided on the outer surface of the T-tube 461. The bolts 46 are rotatably connected to the inner tangent ring 433 and the outer tangent ring 434. When it is necessary to install the outer tangent ring 434 and the inner tangent ring 433, the bolt 46 is rotated 90 degrees. Then, the T-tube 461, which is now horizontally positioned after rotation, is installed into the T-groove 45. Then, the bolt 46 is rotated in the opposite direction so that the T-tube 461 can be locked inside the T-groove 45. The roller 462 improves the smoothness of the rotation of the inner tangent ring 433 and the outer tangent ring 434. Finally, the bolt 46 can be rotated again to disassemble and replace the inner tangent ring 433 and the outer tangent ring 434.

[0046] Working principle: When silver conductive paste needs to be produced, the organic carrier is first injected through the liquid delivery pipe 21 of the kettle lid 2. Then, silver powder is added to the storage ring 31 through the feed pipe 38. After that, the bidirectional motor 441 of the stirring assembly 44 is started, causing the conical plate 431 to rotate. At this time, the organic carrier first falls onto the surface of the conical plate 431, wetting the surface of the conical plate 431. Then, air is introduced through the air pump connected to the air port 22 to drive the blades 33 to rotate. The blades 33 drive the storage ring 31 to rotate in the ring groove 23 through the side rod 32. 31. Triangle plates A26 and B39 rotate and lift, causing silver powder to evenly fill the feed pipe 35 and accelerate its discharge. The discharged silver powder falls onto the surface of the conical plate 431 and premixes with the organic carrier to form a slurry. The slurry then moves along the surface of the conical plate 431 to the surfaces of the inner and outer tangent rings 433 and 434. Meanwhile, the clockwise rotating conical plate 431, through the engagement of the large gear 432 and the medium gear 422, drives the inner tangent ring 433 to rotate counterclockwise. Simultaneously, motor A4211 drives... The moving pinion 4212 meshes with the outer tangent ring 434 and rotates clockwise. The inner tangent ring 433 and the outer tangent ring 434 will generate a reverse shearing force, which, together with the cutting plate 435 and the cutting blade 4351, disperses the agglomerated slurry. Subsequently, the slurry moving to the outer tangent ring 434 will be further dispersed due to centrifugal force, allowing the material to gain maximum inertia and impact the reactor wall. After all the silver powder has been added, the dispersant and thixotropic agent are added to the mixing reactor 1 through the infusion pipe 21 to enhance the stability of the slurry. Then, the bidirectional motor 44... 1. The other output end drives the rotating shaft 442 to rotate. The rotating shaft 442, the top pipe 445, the stirring rod 443 on the horizontal pipe 14, and the grinding rod 444 are stirred synchronously to fully mix the materials and organic carrier. At this time, the external vacuum pump can be used to extract the gas inside the mixing vessel 1 through the evacuation pipe 11 to perform vacuum degassing treatment to avoid the bubbles affecting the purity of the slurry. This completes the premixing operation. By preventing the slurry from clumping, the anti-migration property of the silver conductive slurry is further improved, and the quality of the silver conductive slurry is ultimately improved.

[0047] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A premixing device for high-purity silver conductive paste with low migration and high stability, characterized in that, The system includes a mixing vessel with a lid. Inside the lid is a feeding assembly for discharging materials. A clumping-reducing assembly is fixedly installed on the lower surface of the lid. The clumping-reducing assembly includes a fixing ring fixedly installed on the lower surface of the lid, a support rod fixedly installed on the lower surface of the fixing ring, a Z-shaped plate fixedly installed at one end of the support rod, a base plate fixedly installed at one end of the Z-shaped plate, a stirring assembly for agitating materials fixedly installed on the upper surface of the base plate, and a dispersing device at the output end of the stirring assembly for dispersing and preventing clumping. The centrifugal assembly includes a conical plate disposed at the output end of the stirring assembly. An inner tangent ring is movably disposed on the outer surface of the conical plate, and an outer tangent ring is movably disposed on the outer surface of the inner tangent ring. The feeding assembly is located directly above the centrifugal assembly. A large gear is fixedly mounted on the lower surface of the conical plate and is fixedly connected to the stirring assembly. A middle gear is also disposed below the conical plate. Internal teeth are fixedly mounted on the inner wall of the inner tangent ring and mesh with the middle gear. The inner tangent ring meshes with the middle gear. The Z-shaped plate has four sets, one of which... A central gear is movably mounted on the upper surface of the Z-shaped plate. A motor A is fixedly installed inside another set of Z-shaped plates. A pinion gear is provided at the output end of motor A. Lower teeth are fixedly installed on the lower surface of the outer tangent ring, meshing with the pinion gear. Cutting plates are fixedly installed on the surfaces of both the inner and outer tangent rings. Multiple cutting plates are provided, divided into two groups, with the two groups of cutting plates arranged mirror images of each other. Multiple sets of cutting blades are provided on one side of each group of cutting plates, and the multiple sets of cutting blades are staggered. The stirring assembly includes components fixedly mounted on a chassis. The surface features a bidirectional motor with two sets of output ends. One set of output ends is fixedly installed on the lower surface of the large gear, while the other set of output ends is fixedly installed on a rotating shaft. A top tube is fixedly installed on the lower surface of the chassis. A stirring rod is fixedly installed on the outer surface of the rotating shaft, and a stirring rod is also fixedly installed on the outer surface of the top tube. Multiple grinding rods are fixedly installed on the outer surfaces of the stirring rods, and the grinding rods are arranged in an alternating manner. A fixed pipe is fixedly installed at the bottom of the mixing vessel, and a horizontal pipe is fixedly installed on the outer surface of the fixed pipe. Grinding rods are also fixedly installed on the outer surface of the horizontal pipe.

2. The premixing device for high-purity silver conductive paste with low migration and high stability according to claim 1, characterized in that: An extraction pipe is fixedly installed on the outer surface of the mixing vessel, and a swashplate is fixedly installed at the bottom of the mixing vessel. A vacuum pump is connected to the extraction pipe.

3. The premixing device for high-purity silver conductive paste with low migration and high stability according to claim 2, characterized in that: The feeding assembly includes a storage ring disposed inside the vessel lid. A side rod is fixedly installed on the outer surface of the storage ring. A blade is fixedly installed at one end of the side rod. A movable ring is movably disposed inside the storage ring. A flexible hose is fixedly installed on the upper surface of the movable ring. An inlet pipe is fixedly installed at one end of the flexible hose. A material pipe is connected to one end of the inlet pipe. A feeding pipe is fixedly installed on the storage ring. A feeding port is opened at the bottom of the feeding pipe.

4. The premixing device for high-purity silver conductive paste with low migration and high stability according to claim 3, characterized in that: An infusion pipe is fixedly installed on the surface of the vessel lid, and the infusion pipe is connected to the material chamber. An air port is opened through the outer surface of the vessel lid, and an air pipe is connected to the air port. An annular groove is opened inside the vessel lid. The material storage ring and the material discharge pipe are movably connected inside the annular groove. A plate groove and a rod groove are also opened inside the vessel lid. The plate groove, rod groove, and annular groove are connected to the air port. The blade is located inside the plate groove, and the side rod is located inside the rod groove.

5. The premixing device for high-purity silver conductive paste with low migration and high stability according to claim 4, characterized in that: A triangular plate B is fixedly installed on the lower surface of the storage ring, and a triangular plate A is fixedly installed at the bottom of the ring groove. The triangular plate B is adapted to the triangular plate A.

6. The premixing device for high-purity silver conductive paste with low migration and high stability according to claim 5, characterized in that: The support rod is teardrop-shaped.

7. The premixing device for high-purity silver conductive paste with low migration and high stability according to claim 6, characterized in that: Both the inner tangent ring and the outer surface of the conical plate are provided with T-grooves. Bolts are provided inside the inner tangent ring and the outer tangent ring. A T-tube is fixedly installed at one end of the bolt. A roller is provided on the outer surface of the T-tube. The bolts are rotatably connected to the inner tangent ring and the outer tangent ring.

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