Batching barrel

Abstract

The utility model relates to the field of conductive silver paste production, and particularly discloses a batching cylinder which comprises a base, a fixing frame is fixedly connected to the base, the batching cylinder is fixedly installed on the fixing frame, a discharging port penetrating through the interior of the batching cylinder is formed in the batching cylinder, a plug is installed on the discharging port in a clamped mode, a fixing plate is fixedly connected to the batching cylinder, and the fixing plate is fixedly connected to the base. Two dispersing mechanisms used for dispersing silver powder agglomeration are arranged on the fixing plate, a stirring mechanism used for mixing the dispersed silver powder with other raw material auxiliaries is arranged on the batching barrel, and a discharging mechanism used for conveying the silver powder and other raw materials into the batching barrel is arranged on the batching barrel. The technical problem that the performance of conductive silver paste is affected due to the fact that silver powder is agglomerated when being mixed with other raw materials due to the fact that an existing batching barrel cannot effectively disperse silver powder agglomerates is solved.

Description

Technical Field

[0001] This utility model relates to the field of conductive silver paste production, and specifically discloses a mixing cylinder. Background Technology

[0002] Conductive silver paste, as a key functional material in the manufacture of electronic components, is widely used in photovoltaic cells, 5G radio frequency devices, flexible printed electronics and microelectronic packaging. Its core performance indicators (such as conductivity, adhesion strength and printability) are highly dependent on the uniform dispersion and precise ratio of silver powder and organic carrier during the production process. Most existing conductive silver paste mixing cylinders adopt a structural design that combines mechanical stirring with static mixing. The shearing force generated by the rotating blades is used to break up silver powder clusters and mix them with the resin matrix.

[0003] For example, utility model patent CN218459207U discloses a mixing cylinder for producing conductive silver paste, including a reaction vessel and a top cover. The top cover is installed on the top of the reaction vessel, and multiple identical support legs are fixedly installed at the bottom of the reaction vessel. Two symmetrically distributed material bins are fixedly installed on the top of the top cover, and a dispensing mechanism is installed inside each material bin. A drive motor is fixedly installed at the bottom of the reaction vessel, and a rotating rod is fixedly installed on the output shaft of the drive motor. Multiple identical first stirring rods are fixedly installed on the circumferential sidewall of the rotating rod. This application has a novel structure, enabling automatic material dispensing and intermittent feeding, resulting in more uniform distribution and thus improving the production efficiency of conductive silver paste.

[0004] Existing mixing cylinders for conductive silver paste production only address the issue of uneven material feeding. However, silver powder agglomeration is a common problem in the preparation and application of conductive silver powder. Van der Waals forces between silver powder particles are one of the main causes of agglomeration. Van der Waals forces are intermolecular forces, including orientation forces, dispersion forces, and induction forces. These forces cause silver powder particles to attract each other and agglomerate. Solving the problem of silver powder agglomeration is crucial for improving the performance of conductive silver paste. Good dispersibility helps silver powder to mix fully with other raw materials, improving the conductivity, adhesion, and other properties of the silver paste to meet application requirements. At the same time, avoiding agglomeration ensures the fluidity and stability of the silver paste in subsequent processes, preventing problems such as wire breakage and high porosity. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a mixing cylinder to solve the technical problem that the existing mixing cylinder cannot effectively disperse silver powder agglomerates, which will cause silver powder to agglomerate when mixed with other raw materials, affecting the performance of conductive silver paste.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a base, on which a fixing frame is fixedly connected. A mixing cylinder is fixedly installed on the fixing frame. The mixing cylinder has a discharge port extending through its interior, and a plug is fitted into the discharge port. A fixing plate is fixedly connected to the mixing cylinder. The fixing plate is equipped with two dispersion mechanisms for dispersing silver powder agglomerates. The mixing cylinder is equipped with a stirring mechanism for mixing the dispersed silver powder with other raw materials and additives. The mixing cylinder is also equipped with a discharging mechanism for conveying silver powder and other raw materials into the mixing cylinder. The discharging mechanism conveys the silver powder to the dispersion mechanism, which then disperses some of the agglomerated silver powder. The stirring mechanism then mixes the dispersed silver powder with other additives. Dispersing the silver powder agglomerates helps the silver powder and other additives form a good synergistic effect, improving the overall performance of the silver paste.

[0007] Furthermore, both of the dispersion mechanisms include a first motor, which is fixedly mounted on the fixed plate. A rotating shaft is fixedly connected to the power output shaft of the first motor, and the rotating shaft is rotatably connected to the mixing cylinder. A rotating roller is fixedly connected to the rotating shaft inside the mixing cylinder, and the rotating roller is equipped with several fine needles. Since there are two dispersion mechanisms on the fixed plate, the two first motors rotate relative to each other, i.e., one first motor rotates clockwise and the other rotates counterclockwise. This rotation helps to break up silver powder agglomerates and improve the dispersibility of the silver powder. The numerous fine needles, rotating at high speed, can generate strong shearing and impact forces, effectively breaking up the silver powder agglomerates and improving their dispersibility. By breaking up the agglomerates, the silver powder can be more fully mixed with other additives, improving the utilization rate of the silver powder and reducing waste. The dispersed silver powder helps to improve the conductivity, adhesion, and other properties of the silver paste, meeting application requirements.

[0008] Furthermore, the stirring mechanism includes a protective cylinder, which is fixedly connected to the lower end face of the mixing cylinder. A second motor is installed inside the protective cylinder, and a stirring rod is fixedly connected to the power output shaft of the second motor. The stirring rod is rotatably connected to the mixing cylinder. A disc with a radius smaller than the inner wall radius of the mixing cylinder is installed at the upper end of the stirring rod. A dispersing disc is installed on the disc, and a plurality of dispersing plates are provided on the conical surface of the dispersing disc extending upward from the bottom. The conical design of the dispersing disc and the setting of the dispersing plate on the stirring mechanism increase the contact area between the silver powder and the dispersing mechanism. The rotation of the dispersing disc and the action of the dispersing plate ensure that the silver powder is subjected to uniform centrifugal force and shear force during the falling process, ensuring uniform dispersion of the silver powder. The rotation of the dispersing disc can effectively prevent the silver powder from agglomerating during the falling process, maintaining the dispersibility of the silver powder. The centrifugal force generated by the rotation of the disc makes the silver powder evenly distributed and fall to the bottom of the mixing cylinder, ensuring uniform distribution of the silver powder. At this time, the rotation of the disc can prevent the silver powder from accumulating during the dispersion process, maintaining the fluidity of the silver powder. At the same time, the disc also prevents the stirring rod from splashing silver powder and other additives onto the dispersing mechanism during the stirring process, thereby ensuring that the dispersing mechanism can continuously and effectively disperse the agglomeration of silver powder.

[0009] Furthermore, the feeding mechanism includes a square feeding pipe with the same length as the rotating roller. The square feeding pipe is connected to the dispensing cylinder and is located on the rotating roller. A silver powder storage bin is connected to the square feeding pipe. A sliding opening is provided on the square feeding pipe, and a limit plate is slidably installed at the sliding opening. A hydraulic rod is fixedly connected to the dispensing cylinder, and the telescopic end of the hydraulic rod is fixedly connected to the limit plate. The square feeding pipe on the feeding mechanism has the same length as the rotating roller. When the silver powder falls onto the dispersing mechanism, it can improve the utilization rate of the dispersing mechanism and prevent the silver powder from concentrating in one position, thereby reducing the dispersion effect of silver powder agglomeration.

[0010] Furthermore, the feeding mechanism also includes a silver powder additive storage silo, which is fixedly connected to the side wall of the mixing cylinder. A feeding pipe connected to the mixing cylinder is provided at the lower end of the silver powder additive storage silo, and a valve is installed on the feeding pipe. When the dispersed silver powder falls to the bottom of the mixing cylinder, the additive in the silver powder additive storage silo is transported into the mixing cylinder by rotating the valve to mix with the silver powder, ensuring sufficient contact between the silver powder and the additive. Through the coordinated operation of the dispersion mechanism, the disc, and the valve, uniform mixing of the silver powder and the additive is ensured, improving the overall performance and stability of the silver paste.

[0011] The working principle and beneficial effects of this solution are as follows:

[0012] When it is necessary to start mixing silver powder with other raw materials and additives to make conductive silver paste, first place the silver powder in the silver powder storage bin on the mixing cylinder, and place the other raw materials in the silver powder additive storage bin. After the addition is completed, start the two dispersion mechanisms on the fixed plate. At this time, start the first motor and make it rotate relative to each other (one rotates clockwise and the other rotates counterclockwise). This relative rotation design makes the several fine needles on the two dispersion mechanisms form an inward resultant force, effectively guiding the silver powder from top to bottom. The first motor drives the rotating shaft to rotate, and the rotating shaft drives the rotating roller in the mixing cylinder to rotate. The several fine needles on the rotating roller begin to rotate at high speed, further breaking up the silver powder agglomerates. The high-speed rotation of the fine needles can increase the mutual collision between silver powder particles, further improving the dispersion uniformity of silver powder, ensuring the uniform distribution of silver powder in the silver paste. The dispersed silver powder forms a good synergistic effect with other additives, improving the comprehensive performance of the silver paste, including thixotropy, leveling and adhesion.

[0013] After being thoroughly dispersed, the silver powder falls onto the dispersion disc. At this point, the second motor inside the protective cylinder is activated, driving the stirring rod to rotate. The stirring rod drives the dispersion disc to rotate, and the dispersion plate on the dispersion disc taps the silver powder during rotation, causing it to be evenly transported onto the disc under centrifugal force. The disc is fixedly connected to the stirring rod and is also rotating. Since the radius of the disc is smaller than the radius of the inner wall of the mixing cylinder, the silver powder, under the action of the disc's rotation, falls evenly to the inner bottom surface of the mixing cylinder through centrifugal force and begins to be stirred by the stirring rod. The rotation of the disc and the dispersion helps maintain the fluidity of the silver powder and prevents it from agglomerating or accumulating during the dispersion process. The disc's design prevents the stirring rod from splashing silver powder onto the dispersion mechanism during stirring, thus ensuring that the dispersion mechanism can continuously and effectively disperse any agglomerates of silver powder.

[0014] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0016] Figure 2 This is a top view of an embodiment;

[0017] Figure 3 This is a cross-sectional view of an embodiment;

[0018] Figure 4 Exploded view of the mixing cylinder and stopper in the embodiment;

[0019] Figure 5Exploded view of the square feed tube and limiting plate in the embodiment;

[0020] Figure 6 The exploded view shows the dispersion and stirring mechanisms in the example.

[0021] The following components are marked in the attached diagram: 1. Base; 2. Fixing frame; 3. Feeding cylinder; 4. Plug; 5. Fixing plate; 6. Discharge port; 7. First motor; 8. Rotating shaft; 9. Rotating roller; 10. Several fine needles; 11. Protective cylinder; 12. Second motor; 13. Stirring rod; 14. Disc; 15. Dispersing disc; 16. Dispersing plate; 17. Square feeding pipe; 18. Silver powder storage silo; 19. Limiting plate; 20. Hydraulic rod; 21. Silver powder additive storage silo; 22. Feeding pipe; 23. Valve; 24. Sliding port. Detailed Implementation

[0022] The following detailed description illustrates the specific implementation method:

[0023] Example

[0024] like Figures 1 to 6 As shown, a dispensing cylinder 3 is disclosed, including a base 1, a fixing frame 2, a dispensing cylinder 3, a stopper 4, a fixing plate 5, two dispersing mechanisms, a stirring mechanism, and a discharging mechanism. The fixing frame 2 is fixedly connected to the base 1, and the dispensing cylinder 3 is fixedly installed on the fixing frame 2. The dispensing cylinder 3 has a discharge port 6 that penetrates the interior of the dispensing cylinder 3. A stopper 4 is fitted into the discharge port 6. The fixing plate 5 is fixedly connected to the dispensing cylinder 3, and two dispersing mechanisms are provided on the fixing plate 5. These two dispersing mechanisms are used to disperse silver powder agglomerates. A stirring mechanism is provided on the dispensing cylinder 3, located below the two dispersing mechanisms. The stirring mechanism is used to mix the dispersed silver powder with other raw materials and additives. The dispensing mechanism is provided on the dispensing cylinder 3 to transport the silver powder and other raw materials into the dispensing cylinder 3. Figure 1 , Figure 2 and Figure 4 As shown.

[0025] The dispersing mechanism includes a first motor 7, a rotating shaft 8, a rotating roller 9, and several fine needles 10. The first motor 7 is mounted on a fixed plate 5. The power output shaft of the first motor 7 is fixedly connected to the rotating shaft 8 via a coupling. The rotating shaft 8 is rotatably mounted on the dispensing cylinder 3. The rotating roller 9 is fixedly mounted on the rotating shaft 8 and is located inside the dispensing cylinder 3. Several fine needles 10 are fixedly connected to the rotating roller 9. Figure 2 , Figure 3 and Figure 5 As shown.

[0026] The stirring mechanism includes a protective cylinder 11, a second motor 12, a stirring rod 13, a disc 14, a dispersing disc 15, and dispersing plates 16. The protective cylinder 11 is fixedly installed on the lower end face of the mixing cylinder 3. The second motor 12 is installed inside the protective cylinder 11. The stirring rod 13 is rotatably connected to the mixing cylinder 3. The lower end of the stirring rod 13 passes through the mixing cylinder 3 and is fixedly connected to the power output shaft of the second motor 12 via a coupling. The disc 14 is fixedly connected to the upper end of the stirring rod 13. The radius of the disc 14 is smaller than the inner wall radius of the mixing cylinder 3. The dispersing disc 15 is fixedly connected to the upper end face of the disc 14. The dispersing disc 15 is conical. Several dispersing plates 16 are fixedly connected to the dispersing disc 15, extending upwards along the conical surface of the dispersing disc 15. Figure 4 and Figure 6 As shown.

[0027] The feeding mechanism includes a square feeding pipe 17, a silver powder storage bin 18, a limiting plate 19, a hydraulic rod 20, a silver powder additive storage bin 21, a feeding pipe 22, and a valve 23. The square feeding pipe 17 is fixedly connected to the upper end face of the dispensing cylinder 3. The square feeding pipe 17 is connected to the dispensing cylinder 3. The length of the square feeding pipe 17 is the same as the length of the rotating roller 9. A silver powder storage bin 18 is installed on the square feeding pipe 17 and is connected to the square feeding pipe 17. An opening is located on the square feeding pipe 17. A sliding port 24 is provided, and a limiting plate 19 is slidably installed inside the sliding port 24. A hydraulic rod 20 is fixedly connected to the dispensing cylinder 3, and the telescopic end of the hydraulic rod 20 is fixedly connected to the limiting plate 19. A silver powder additive storage silo 21 is fixedly connected to the side wall of the dispensing cylinder 3. A feeding pipe 22 is fixedly connected to the lower end face of the silver powder additive storage silo 21. One end of the feeding pipe 22 is connected to the silver powder additive storage silo 21, and the other end of the feeding pipe 22 is connected to the dispensing cylinder 3. A valve 23 is provided on the feeding pipe 22. Figure 3 and Figure 4 As shown.

[0028] In practice

[0029] When it is necessary to start mixing silver powder with other raw materials and additives to make conductive silver paste, the base 1 fixes the fixing frame 2, and the fixing frame 2 fixes and supports the mixing cylinder 3. First, the silver powder is placed in the silver powder storage bin 18 on the mixing cylinder 3, and then the other raw materials to be mixed are placed in the silver powder additive storage bin 21. After the raw materials are added, since there are two dispersing mechanisms on the fixing plate 5, the two first motors 7 on the fixing plate 5 are started to rotate relative to each other, that is, one first motor 7 rotates clockwise and the other first motor 7 rotates counterclockwise. This relative rotation design allows the several fine needles 10 on the two dispersing mechanisms to form an inward resultant force, thereby effectively guiding the silver powder from top to bottom. The first motor 7 drives the rotating shaft 8 to rotate. When the rotating shaft 8 rotates, it will drive the rotating roller 9 located in the mixing cylinder 3 to start rotating. When the rotating roller 9 starts to rotate, it will drive the several fine needles 10 on the rotating roller 9 to start rotating continuously at high speed.

[0030] When the rotating roller 9 starts to drive the several fine needles 10 to rotate, the hydraulic rod 20 on the feeding cylinder 3 is activated. The hydraulic rod 20 drives the limiting plate 19 to move away from the square feeding pipe 17. At this time, the limiting plate 19 will gradually move out of the sliding port 24 on the square feeding pipe 17. When the limiting plate 19 moves, the silver powder in the silver powder storage bin 18 will enter the feeding cylinder 3 through the square feeding pipe 17. The silver powder will first pass through the several fine needles 10 that are rotating at high speed. The several fine needles 10 will break up the agglomerated silver powder. At this time, the dispersed silver powder will fall onto the dispersing plate 15. At this time, the second motor 12 in the protective cylinder 11 is activated. The second motor 12 drives the stirring rod 13 on the feeding plate to rotate. The stirring rod 13 starts to rotate. When the agitator moves, it will drive the dispersing disc 15 to rotate. When the dispersing disc 15 starts to rotate, it will drive the dispersing plate 16 to rotate. During the rotation, the dispersing plate 16 beats the silver powder, which is then transported to the disc 14 under the action of centrifugal force. Since the disc 14 is fixedly connected to the agitator, the disc 14 is also rotating at this time. Since the radius of the disc 14 is smaller than the inner wall radius of the mixing cylinder 3, the silver powder on the disc 14 will also fall to the bottom surface of the mixing cylinder 3 by centrifugal force. At this time, the valve 23 on the feeding pipe 22 can be activated. After the valve 23 is opened, the additive in the silver powder additive hopper will be transported to the mixing cylinder 3 through the feeding pipe 22 to start mixing with the already dispersed and agglomerated silver powder. The agitator 13 mixes the already dispersed and agglomerated silver powder with other raw materials and additives.

[0031] After the silver powder is mixed with other raw materials and additives, the plug 4 on the mixing cylinder 3 can be pulled out, and the mixed conductive silver paste can be discharged through the discharge port 6.

[0032] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or its practicality.

Claims

1. A dispensing cylinder, characterized in that: The device includes a base, a fixed frame fixedly connected to the base, a mixing cylinder fixedly installed on the fixed frame, a discharge port penetrating the interior of the mixing cylinder, a plug fitted into the discharge port, a fixed plate fixedly connected to the mixing cylinder, two dispersion mechanisms for dispersing silver powder agglomerates on the fixed plate, a stirring mechanism for mixing the dispersed silver powder with other raw materials and additives on the mixing cylinder, and a discharging mechanism for conveying silver powder and other raw materials into the mixing cylinder.

2. A dispensing cylinder according to claim 1, characterized in that: Both of the dispersing mechanisms include a first motor, which is fixedly mounted on the fixed plate. The power output shaft of the first motor is fixedly connected to a rotating shaft, which is rotatably connected to the dispensing cylinder. The rotating shaft is located inside the dispensing cylinder and is fixedly connected to a rotating roller, which is provided with a plurality of fine needles.

3. A dispensing cylinder according to claim 2, characterized in that: The stirring mechanism includes a protective cylinder, which is fixedly connected to the lower end face of the mixing cylinder. A second motor is installed inside the protective cylinder, and a stirring rod is fixedly connected to the power output shaft of the second motor. The stirring rod is rotatably connected to the mixing cylinder. A disc with a radius smaller than the inner wall radius of the mixing cylinder is installed at the upper end of the stirring rod. A dispersing disc is installed on the disc, and a plurality of dispersing plates are provided on the conical surface of the dispersing disc extending upward from the bottom.

4. A dispensing cylinder according to claim 3, characterized in that: The feeding mechanism includes a square feeding tube, the square feeding tube being the same length as the rotating roller, the square feeding tube being connected to the feeding cylinder, the square feeding tube being placed on the rotating roller, a silver powder storage bin being connected to the square feeding tube, a sliding opening being provided on the square feeding tube, a limit plate being slidably provided at the sliding opening, a hydraulic rod being fixedly connected to the feeding cylinder, and the telescopic end of the hydraulic rod being fixedly connected to the limit plate.

5. A dispensing cylinder according to claim 4, characterized in that: The feeding mechanism also includes a silver powder additive storage bin, which is fixedly connected to the side wall of the mixing cylinder. A feeding pipe communicating with the mixing cylinder is provided at the lower end of the silver powder additive storage bin, and a valve is provided on the feeding pipe.

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