A uniformly mixed inductive silver paste stirring device

Abstract

This utility model relates to the field of inductive silver paste stirring technology, specifically to an inductive silver paste stirring device for uniform mixing. It includes two support rods, each fixedly connected to several stirring rods. One end of each support rod is connected to the side wall of a frame, and the ends of the two support rods are connected by a belt. One end of one of the support rods is connected to the output shaft of a drive motor. By setting rotatably connected support rods at the upper and lower parts of the inner side of the frame, and installing multiple stirring rods on them, a double-layer stirring structure is formed, expanding the stirring range, enhancing the shearing and agitation capabilities of the paste, and significantly reducing material accumulation at the edges and bottom. The two support rods are synchronously driven by a belt, resulting in a simple and reliable structure that ensures consistent stirring motion and avoids increased internal stress or energy consumption due to differences in rotational speed.

Description

Technical Field

[0001] This utility model relates to the field of inductive silver paste stirring technology, and in particular to an inductive silver paste stirring device for uniform mixing. Background Technology

[0002] Inductor silver paste mixing equipment plays a crucial role in the manufacturing of electronic components. As a key step in the production of precision electronic components such as surface mount inductors and thick-film circuits, its mixing uniformity has a decisive impact on the conductivity, adhesion, sintering characteristics, and electrical stability of the final product. Inductor silver paste is a high-value-added conductive paste composed of micron- or nano-sized silver powder, organic carriers, dispersants, rheology modifiers, and additives. It is widely used in surface mount inductors, multilayer ceramic capacitors, solar cell electrodes, and semiconductor packaging. Its core function is to form conductive lines or electrodes on a substrate, which are then sintered to form a dense, low-resistance conductive path. The uniformity of the silver paste directly affects the consistency of the coating thickness, the stability of the resistivity, and the long-term reliability of the components. Therefore, in the silver paste preparation process, the mixing step is a critical step to ensure sufficient dispersion of the components and prevent agglomeration and delamination.

[0003] Utility model patent CN210814852U discloses a device for preparing silver paste for surface mount inductors, which includes a preparation tank, a heating mechanism, a stirring mechanism, and a driving mechanism. The preparation tank is equipped with a liquid level observation window, a feeding mechanism, and a discharge pipe. The heating mechanism is used to control the paste temperature. The stirring mechanism is fixed inside the tank by a mounting strip, and the driving mechanism is connected to the stirring mechanism to realize the stirring function. Although this device can improve the quality and production efficiency of silver paste to a certain extent and extend the service life of the finished surface mount, it still has significant drawbacks in practical applications.

[0004] First, existing stirring mechanisms mostly employ fixed paddle structures, resulting in a single stirring path that fails to cover the bottom and corners of the preparation container. This leads to blind spots in the stirring of the slurry at the edges and bottom of the container, causing material accumulation and uneven mixing. Second, the lack of an effective vertical circulation mechanism for the slurry during stirring allows high-density silver powder to easily settle under gravity, creating a vertical concentration gradient and affecting the overall uniformity of the silver paste. Furthermore, existing devices struggle to adjust the stirring speed and direction in real time, failing to adapt to the process requirements of different batches and viscosities of silver paste, resulting in low stirring efficiency, long processing times, and poor quality stability. Therefore, to address these shortcomings of existing technologies, we urgently need an innovative inductive silver paste stirring device to solve these problems. Utility Model Content

[0005] The purpose of this invention is to provide a uniformly mixed inductive silver paste stirring device, which solves the problem that the existing stirring mechanisms mostly adopt fixed blade structures, with a single stirring path, which makes it difficult to cover the bottom and corner areas of the preparation tank, resulting in the formation of stirring blind zones at the edges and bottom of the container, and the accumulation of materials and uneven mixing.

[0006] To achieve the above objectives, this utility model provides an inductive silver paste stirring device for uniform mixing, including a frame, and a bearing rod rotatably connected to both the upper and lower inner sides of the frame, and a drive motor fixedly connected to one side of the outer wall of the frame by bolts;

[0007] Several agitator rods are fixedly connected to each of the two support rods, and one end of each support rod is on the side wall of the frame. The two support rods are connected by a belt. One end of one of the support rods is connected to the output shaft of the drive motor. A discharge pipe is connected to one side of the middle of the frame. A pump body is fixedly connected to one side of the frame by bolts. The inlet of the pump body is connected to one side of the discharge pipe. Two connecting pipes are connected to the outlet of the pump body. One end of each connecting pipe is connected to the upper and lower sides of the frame, respectively.

[0008] The frame has a door that is hinged to the outside of the frame, and a bottom valve is installed on the bottom of the frame.

[0009] One end of each of the two support rods is rotatably connected to the inner wall of the frame via a pivot, and the other end of each support rod passes through the side wall of the frame via a bearing sleeve.

[0010] Each of the two support rods has a pulley fitted onto one end, and the two pulleys are connected by a belt winding around each other.

[0011] The top two sides of the frame are fixedly connected to the feeding frame, and the bottom of the two feeding frames are provided with several slots.

[0012] The frame is fixedly connected to one side of the frame, and the pump body is fixedly connected to one side of the fixed frame by bolts. Control valves are installed on one end of the two connecting pipes. A connecting pipe is connected to the inlet of the pump body, and one end of the connecting pipe is connected to one side of the discharge pipe.

[0013] This invention discloses a uniformly mixing inductive silver paste stirring device. By rotatably connecting support rods at the upper and lower parts of the inner side of the frame, and mounting multiple stirring rods on these rods, a double-layer stirring structure is formed. This expands the stirring range, enhances the shearing and agitation capabilities of the paste, and significantly reduces material accumulation at the edges and bottom. The two support rods are synchronously driven by a belt, ensuring a simple and reliable structure and maintaining consistent stirring motion, avoiding increased internal stress or energy consumption due to speed differences. The drive motor provides a stable power source, facilitating speed adjustment according to the silver paste viscosity, thus improving process adaptability and operational flexibility. Most importantly, a forced circulation system consisting of a pump body, discharge pipe, and two connecting pipes extracts the paste from the middle of the frame and pumps it to the upper and lower areas respectively. This breaks the limitation of traditional stirring relying solely on local shearing, achieving the main vertical mixing of the paste. Dynamic circulation and convection effectively suppress the sedimentation tendency of high-density silver powder, eliminate the stratification phenomenon, and improve the overall mixing uniformity. The design of connecting pipes to the upper and lower parts of the frame allows the reflow slurry to re-enter the mixing zone from different heights, further agitating the flow field and enhancing the mixing effect. The entire device combines mechanical stirring with fluid circulation, retaining the shearing and dispersing function of traditional stirring while introducing a dynamic circulation mechanism. This compensates for the shortcomings of fixed-blade stirring, such as a single path and incomplete coverage, improving stirring efficiency, shortening mixing time, and reducing energy consumption. At the same time, the more stable and consistent mixing quality reduces batch-to-batch differences, which is beneficial for the process control of subsequent coating, printing, and other processes. This ensures the conductivity and long-term reliability of the final inductor components, meeting the actual needs of modern electronic pastes for high uniformity and high stability production. It has good practical value and industrialization prospects. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall main view structure of an embodiment of this utility model.

[0016] Figure 2 This is a rear view structural schematic diagram of an embodiment of the present utility model.

[0017] Figure 3 This is a schematic diagram of the inner structure of the frame in an embodiment of this utility model.

[0018] Figure 4 This is a bottom view of the structure of an embodiment of the present invention.

[0019] Figure 5 This is a top view of an embodiment of the present invention.

[0020] 1. Frame; 2. Door; 3. Bottom valve; 4. Feed frame; 5. Drive motor; 6. Pulley; 7. Belt; 8. Discharge pipe; 9. Pump body; 10. Connecting pipe; 11. Control valve; 12. Fixing frame; 13. Connecting pipe; 14. Bearing rod; 15. Agitating rod; 16. Slot. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Please see Figure 1-5 ,

[0023] A uniformly mixed inductive silver paste stirring device includes a frame 1, and a support rod 14 is rotatably connected to the upper inner part and the lower inner part of the frame 1. A drive motor 5 is fixedly connected to one side of the outer wall of the frame 1 by bolts.

[0024] Several agitator rods 15 are fixedly connected to each of the two support rods 14, and one end of each support rod 14 is on the side wall of the frame 1. The two support rods 14 are connected by a belt 7. One end of one of the support rods 14 is connected to the output shaft of the drive motor 5. A discharge pipe 8 is connected to one side of the middle part of the frame 1. A pump body 9 is fixedly connected to one side of the frame 1 by bolts. The inlet of the pump body 9 is connected to one side of the discharge pipe 8. Two connecting pipes 10 are connected to the outlet of the pump body 9. One end of each connecting pipe 10 is connected to the upper side and the lower side of the frame 1, respectively.

[0025] First, the prepared silver powder, organic carrier, and other additives are poured into the inner cavity of the frame 1 through the top opening. Then, the drive motor 5, bolted to one side of the outer wall of the frame 1, is started. The output shaft of the drive motor 5 drives a support rod 14 connected to it to rotate. One end of the support rod 14 and the other end of the other support rod 14 are synchronously driven by a belt 7, ensuring that the two support rods 14 rotate in the same direction and stably both at the top and bottom of the inner side of the frame 1. As the two support rods 14 rotate, multiple agitator rods 15 fixedly connected to them move in a circular motion within the silver paste. The agitator rods 15 shear, push, and agitate the paste at different heights, effectively breaking up silver powder agglomerates and promoting full dispersion of the components. Simultaneously, to solve the problems of bottom sedimentation and layering in traditional mixing devices, the fixed agitator rods 15 are activated... The pump body 9 on one side of the frame 1 draws silver paste from the middle section through the discharge pipe 8 connected to the middle side of the frame 1 at its inlet. The slurry is then pressurized and delivered to two connecting pipes 10 through the outlet of the pump body 9. The two connecting pipes 10 are reconnected to the upper and lower sides of the frame 1, respectively, thereby forcibly circulating the middle section slurry into the upper and lower spaces of the frame 1. This circulation process causes the high-density silver powder, which is originally easy to settle, to flow upward with the fluid, while bringing the thinner upper slurry into the bottom area to participate in the mixing, forming vertical convection and significantly improving the concentration uniformity in the vertical direction. Under the dual action of mechanical stirring by the stirring rod 15 and fluid circulation driven by the pump body 9, the silver paste is mixed in all directions without dead corners inside the frame 1, avoiding the stirring blind spots formed at the corners and bottom of the traditional fixed blade structure.

[0026] Furthermore, a door 2 is rotatably connected to the outer side of the frame 1 via a hinge, and a bottom valve 3 is installed on the lower side of the frame 1. The door 2 is rotatably connected to the outer side of the frame 1 via a hinge, so that the side opening of the frame 1 can be opened and closed. Before the mixing operation, the door 2 can be opened to facilitate cleaning, maintenance or inspection of the inside of the frame 1, and the condition of the stirring rod 15 and the bearing rod 14. At the same time, it provides an auxiliary channel when adding or discharging materials. After the mixing is completed, the door 2 is closed to ensure sealing. Combined with the bottom valve 3 installed on the lower side, the bottom valve 3 can be opened to achieve complete discharge when cleaning or emptying residual materials, thereby improving the convenience of equipment maintenance and the thoroughness of material discharge.

[0027] Furthermore, one end of each of the two support rods 14 is rotatably connected to the inner wall of the frame 1 via a rotating shaft, and the other end of each support rod 14 passes through the side wall of the frame 1 via a bearing sleeve. The bearing sleeve provides radial support and axial positioning, ensuring that the support rods 14 maintain coaxiality and stability during rotation, reducing wear and noise caused by eccentricity or vibration, and facilitating the disassembly and replacement of the agitator rod 15 or the support rod 14. This achieves the effects of enhancing the support strength of the rotating structure, improving operational stability, and facilitating maintenance.

[0028] Furthermore, pulleys 6 are fitted onto one end of each of the two support rods 14, and the two pulleys 6 are connected by a belt 7. The belt 7 connects the two pulleys 6 to form a synchronous transmission mechanism. When the drive motor 5 drives one of the support rods 14 to rotate, the power is efficiently transmitted to the other support rod 14 through the meshing transmission of the pulley 6 and the belt 7. This ensures that the upper and lower sets of stirring rods 15 operate synchronously, avoiding uneven stirring or structural imbalance due to differences in speed. This achieves the effect of ensuring the synchronization of double-layer stirring, improving transmission reliability and power transmission efficiency.

[0029] Furthermore, feeding frames 4 are fixedly connected to both sides of the top of the frame 1, and several troughs 16 are opened at the bottom of the two feeding frames 4. The two feeding frames 4 are fixed to the top of the frame 1, and multiple troughs 16 are opened at the bottom. When raw materials such as silver powder and organic carrier are put into the feeding frames 4, the materials are evenly dispersed into the interior of the frame 1 through the troughs 16, avoiding local accumulation or splashing caused by concentrated feeding at one time. At the same time, the troughs 16 play a preliminary screening role, preventing large particles of impurities from entering the mixing area, thus achieving the effects of uniform feeding, reducing dust and improving the controllability of feeding.

[0030] Furthermore, a fixed frame 12 is fixedly connected to one side of the frame 1, and the pump body 9 is fixedly connected to one side of the fixed frame 12 by bolts. A control valve 11 is installed on one end of each of the two connecting pipes 10. A connecting pipe 13 is connected to the inlet of the pump body 9, and one end of the connecting pipe 13 is connected to one side of the discharge pipe 8. The pump body 9 is fixed to the inside of the fixed frame 12 by bolts, which enhances the installation stability of the pump body 9 and reduces operating vibration. The control valves 11 installed on the two connecting pipes 10 can adjust the flow rate of the upper and lower return branches respectively, and flexibly control the circulation path and distribution ratio according to the stirring requirements. The connecting pipe 13 connects the inlet of the pump body 9 and the discharge pipe 8, which simplifies the pipeline connection structure, facilitates sealing and maintenance, and achieves the effects of improving the installation reliability of the pump body 9, realizing adjustable circulation flow rate and convenient system maintenance.

[0031] In summary:

[0032] First, open the door 2, which is hinged to the outside of the frame 1, and check the cleanliness of the inside of the frame 1, confirming that the bearing rod 14 and the stirring rod 15 are normal. Then, close the door 2 to ensure a tight seal. The operator feeds the prepared silver powder, organic carrier, and other additives into the feed frame 4, which is fixed on both sides of the top of the frame 1. The material flows evenly into the inner cavity of the frame 1 through multiple troughs 16 at the bottom of the feed frame 4, avoiding local accumulation or splashing caused by concentrated feeding. At the same time, the troughs 16 serve as a preliminary screening function to prevent large particles of impurities from entering. The start-up is achieved by bolts fixing the... A drive motor 5 is located on one side of the outer wall of the frame 1. The output shaft of the drive motor 5 drives a support rod 14 connected to it to rotate. One end of the support rod 14 is fitted with a pulley 6, and the corresponding end of the other support rod 14 is also fitted with a pulley 6. The two are connected by a belt 7 to form a synchronous transmission structure, so that the two support rods 14 rotate in the same direction and stably in the upper and lower parts inside the frame 1, respectively. One end of the two support rods 14 is rotatably connected to the inner wall of the frame 1 through a rotating shaft, and the other end passes through the side wall of the frame 1 through a bearing sleeve. The bearing sleeve provides radial support and axial positioning to ensure... The rotation process ensures coaxiality and stability, reducing vibration and wear. As the two support rods 14 rotate, multiple agitator rods 15 fixedly connected to them move in a circular motion within the silver paste, shearing, pushing, and agitating the paste to break up silver powder agglomerates and promote full dispersion of the components. Simultaneously, to prevent high-density silver powder from settling and stratifying, the pump body 9 installed within the fixed frame 12 is activated. The pump body 9 is connected to the discharge pipe 8 on one side of the middle section of the frame 1 via a connecting pipe 13, drawing silver paste from the middle section, pressurizing it, and then conveying it through the outlet to two connecting pipes 10. Control valves 11 are installed on each of the two parts, which can adjust the flow distribution according to process requirements. The slurry is pumped into the upper and lower sides of the frame 1 to achieve forced circulation, which promotes the upward flow of the thicker slurry in the middle and lower parts and the downward replenishment of the thinner slurry in the upper part, forming effective convection and significantly improving the concentration uniformity in the vertical direction. After stirring continues until the predetermined time or uniformity requirement is reached, the drive motor 5 and pump 9 are turned off, and the bottom valve 3 on the lower side of the frame 1 is opened to completely discharge the mixed inductive silver paste. If necessary, the door 2 can be opened again to clean and maintain the interior to ensure that there is no residue.By setting double-layer bearing rods 14 and stirring rods 15 on the upper and lower parts of the inner side of the frame 1, the stirring range is expanded, the shearing and turning ability of the slurry is enhanced, and the accumulation of material at the corners and bottom is effectively reduced; the transmission structure of belt 7 and two pulleys 6 ensures that the upper and lower bearing rods 14 operate synchronously, avoiding uneven stirring or structural imbalance caused by speed difference, and improving the reliability and stability of transmission; the drive motor 5 provides a controllable power source, which makes it easy to adjust the stirring speed according to the viscosity of the slurry, enhancing the process adaptability; the circulation system composed of pump body 9, discharge pipe 8, connecting pipe 10, and connecting pipe 13 realizes Forced convection of the slurry breaks the limitations of traditional stirring that relies solely on local shearing, significantly suppressing silver powder sedimentation and improving overall uniformity. The control valve 11 allows for independent adjustment of the upper and lower circulation flow rates, enhancing operational flexibility and process control precision. The structure of the feed frame 4 and the trough 16 enables uniform material dispersion, reducing dust and localized excessive concentration, and improving the controllability and cleanliness of the feeding process. The door 2 is connected by hinges, facilitating cleaning, inspection, and maintenance of the equipment's interior. The bottom valve 3 is located at the bottom of the frame 1, ensuring that residual materials and cleaning fluid can be completely discharged, avoiding cross-contamination.

[0033] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A uniformly mixing inductive silver paste stirring device, comprising a frame, characterized in that, It also includes a load-bearing rod rotatably connected to the upper and lower inner sides of the frame, and a drive motor is fixedly connected to one side of the outer wall of the frame by bolts; Several agitator rods are fixedly connected to each of the two support rods, and one end of each support rod is on the side wall of the frame. The two support rods are connected by a belt. One end of one of the support rods is connected to the output shaft of the drive motor. A discharge pipe is connected to one side of the middle of the frame. A pump body is fixedly connected to one side of the frame by bolts. The inlet of the pump body is connected to one side of the discharge pipe. Two connecting pipes are connected to the outlet of the pump body. One end of each connecting pipe is connected to the upper side and the lower side of the frame, respectively.

2. The inductive silver paste mixing device as described in claim 1, characterized in that, The frame is connected to a door via a hinge on one side, and a bottom valve is installed on the lower side of the frame.

3. The inductive silver paste mixing device as described in claim 1, characterized in that, One end of each of the two bearing rods is rotatably connected to the inner wall of the frame via a pivot, and the other end of each bearing rod passes through the side wall of the frame via a bearing sleeve.

4. The inductive silver paste mixing device as described in claim 1, characterized in that, Each of the two bearing rods has a pulley fitted onto one end, and the two pulleys are connected by a belt winding around each other.

5. The inductive silver paste mixing device as described in claim 1, characterized in that, The top two sides of the frame are fixedly connected to feeding frames, and the bottom of the two feeding frames are provided with several slots.

6. The inductive silver paste mixing device as described in claim 1, characterized in that, A fixed frame is fixedly connected to one side of the frame, and the pump body is fixedly connected to one side of the fixed frame by bolts. A control valve is installed on one end of each of the two connecting pipes. A connecting pipe is connected to the inlet of the pump body, and one end of the connecting pipe is connected to one side of the discharge pipe.

Images