Silver paste stirring device

Abstract

The utility model discloses a silver paste stirring device, which comprises a stirring barrel, a stirring shaft and a stirring shaft, the stirring barrel cover is fixedly arranged on the stirring barrel, and a plurality of feeding pipes are arranged on the stirring barrel cover; the motor is arranged on the stirring barrel cover through a fixing support, and a rotating shaft of the motor extends into the stirring barrel; the rotating shaft is provided with an inner stirring mechanism for stirring the silver paste in the center of the stirring barrel and an outer stirring mechanism for stirring the silver paste close to the barrel wall in the stirring barrel; and a cross-shaped stirring paddle for stirring silver paste at the bottom of the stirring barrel is arranged at the bottom of the rotating shaft. Compared with the prior art, the silver paste stirring device has the following beneficial effects that silver paste in the stirring barrel and on the wall of the stirring barrel is stirred in different stirring directions, and the silver paste at the bottom of the device is stirred, so that the silver paste in the stirring barrel flows more sufficiently, and the stirring efficiency of the silver paste is improved.

Description

Technical Field

[0001] This utility model relates to the field of silver paste processing and stirring, specifically to a silver paste stirring device. Background Technology

[0002] Silver paste, used as an adhesive between semiconductor chips and metal substrates, possesses excellent conductivity and is robust and reliable. Typically, factories use stirring devices to agitate the silver paste during use to ensure its conductivity.

[0003] Traditional silver paste tanks have relatively simple stirring structures, which cannot effectively stir the substances inside the device. For example, patent application CN210544605U discloses a silver paste tank that uses a drive device to drive a stirring shaft and stirring blades to stir the silver paste in the stirring tank. The reason for this is that the particle size of silver paste is usually only about 25 nanometers, and the stirring mechanism inside the device is set at a large distance from the inner wall and bottom of the stirring tank. In addition, the stirring blade structure inside the device is simple, which makes the silver paste in the device have poor fluidity and cannot flow fully during stirring. As a result, the silver paste located at the edge and bottom of the stirring tank cannot be well stirred.

[0004] To ensure thorough mixing of the materials inside the apparatus, existing mixing devices with relatively complex structures exist to guarantee adequate mixing. For example, patent application CN213160815U discloses a reverse spiral urea reactor. This reactor uses a first motor to drive spiral stirring bars on a stirring shaft to mix the materials inside the apparatus. Simultaneously, a second motor drives the spiral stirring bars on a hollow stirring shaft to mix the materials around the outer periphery of the apparatus. Furthermore, to ensure structural stability, fixing rods are installed on the spiral stirring bars on the hollow stirring shaft to stabilize their position and shape.

[0005] However, the aforementioned device is used in the reaction process of urea raw materials and water, where the fluidity of the reactants is greater than that of silver paste. Therefore, this device can drive the flow of reactants without considering the distance between the stirring structure and the inner wall and bottom of the mixing tank. Furthermore, the stirring structure of this device is more complex, thus improving the stirring effect to some extent. However, if the stirring mechanism of this device is applied to a silver paste mixing device, the silver paste on the inner wall of the mixing tank cannot be scraped off due to the large distance between the internal stirring mechanism and the inner wall. The material near the inner wall cannot be fully stirred. Additionally, the stirring mechanism still lacks a structure to stir the material at the bottom of the mixing tank, resulting in poor stirring of the material at the bottom. Therefore, the actual improvement in stirring effect of this device remains limited. Utility Model Content

[0006] One object of this invention is to solve at least the aforementioned problems and / or defects, and to provide at least the advantages described below.

[0007] To achieve these objectives and other advantages according to the present invention, a silver paste stirring apparatus is provided, comprising:

[0008] The mixing tank has a discharge port at the bottom;

[0009] A mixing tank cover is fixedly mounted on the mixing tank, and the mixing tank cover is provided with multiple feed pipes;

[0010] The motor is mounted on the mixing tank cover by a fixed bracket, and the motor shaft extends into the mixing tank.

[0011] The rotating shaft is equipped with an inner stirring mechanism for stirring the silver paste located at the center of the mixing tank, and an outer stirring mechanism for stirring the silver paste located near the tank wall inside the mixing tank; the bottom of the rotating shaft is equipped with a cross-shaped stirring paddle for stirring the silver paste at the bottom of the mixing tank.

[0012] Preferably, the mixing tank has multiple feet on its outer periphery at the bottom.

[0013] Preferably, the method by which the mixing tank cover is fixedly installed on the mixing tank can be configured as follows:

[0014] The outer wall of the mixing tank opening is provided with multiple fixing grooves, and the mixing tank cover is provided with fixing ears that match the multiple fixing grooves. The fixing ears and fixing grooves are fixedly connected by bolts.

[0015] Preferably, the external stirring mechanism includes:

[0016] Multiple outer stirring layers, each outer stirring layer includes multiple tile-shaped outer stirring blades, and each outer stirring blade is fixedly connected to the rotating shaft through a corresponding connecting rod;

[0017] In this structure, multiple external stirring blades located in the same vertical direction are connected into a single structure by scrapers. The scrapers are in clearance fit with the inner wall of the stirring tank to scrape the silver paste on the tank wall during rotation.

[0018] Preferably, the internal stirring mechanism includes:

[0019] Multiple inner stirring layers are fixedly connected to the rotating shaft and are spaced apart between adjacent outer stirring layers. Each inner stirring layer includes multiple fan-shaped inner stirring blades, and the stirring direction of the inner stirring blades is opposite to that of the outer stirring blades.

[0020] This utility model has at least the following beneficial effects:

[0021] By incorporating both external and internal stirring mechanisms within the mixing tank, the silver paste located near the tank wall at its center is agitated. Simultaneously, the external and internal stirring mechanisms stir the silver paste in opposite directions, creating multiple circular flows distributed along the ring around the tank wall. This increases the stirring rate and ensures more thorough mixing. The cross-shaped stirring paddle at the bottom of the shaft reduces silver paste deposition at the bottom of the tank, further enhancing the stirring effect and ensuring effective internal mixing. Furthermore, the external stirring paddle is equipped with a scraper to ensure effective external mixing while maintaining the structural stability of the external stirring mechanism.

[0022] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached image description:

[0023] Figure 1 It is a silver paste stirring device;

[0024] Figure 2 This is a cross-sectional view of the stirring device;

[0025] Figure 3 Bottom view of the stirring device;

[0026] Figure 4 This is a diagram of the stirring mechanism.

[0027] The markings in the diagram are: 1. Mixing tank, 11. Discharge port, 12. Support foot, 2. Mixing tank cover, 21. Feed pipe, 3. Motor, 31. Fixed bracket, 32. Rotating shaft, 4. Internal mixing mechanism, 41. Internal mixing paddle, 5. External mixing mechanism, 51. External mixing paddle, 52. Connecting rod, 53. Scraper, 6. Cross mixing paddle, 22. Fixed groove, 23. Fixed lug, 24. Bolt. Detailed implementation method:

[0028] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0029] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0030] It should be noted that in the description of this utility model, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0032] Furthermore, in this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] like Figures 1-4 As shown, a silver paste stirring device includes:

[0034] The mixing tank 1 has a discharge port 11 at its bottom;

[0035] A mixing tank cover 2 is fixedly mounted on the mixing tank 1, and a plurality of feed pipes 21 are provided on the mixing tank cover 2;

[0036] Motor 3 is mounted on mixing tank cover 2 via fixed bracket 31, and the rotating shaft 32 of motor 3 extends into mixing tank 1;

[0037] The rotating shaft 32 is provided with an inner stirring mechanism 4 for stirring the silver paste located at the center of the stirring tank 1, and an outer stirring mechanism 5 for stirring the silver paste located near the tank wall inside the stirring tank 1; the bottom of the rotating shaft 32 is provided with a cross-shaped stirring paddle 6 for stirring the silver paste at the bottom of the stirring tank 1.

[0038] Working principle:

[0039] When the operator needs to stir the silver paste, the operator can introduce the silver paste into the mixing tank 1 through multiple feed pipes 21 on the mixing tank cover 2, and simultaneously start the motor 3 located on the mixing tank cover 2. At this time, the outer stirring mechanism 5 and the inner stirring mechanism 4 on the rotating shaft 32 of the motor 3 will rotate and stir inside the mixing tank 1 to stir the silver paste located in the mixing tank 1. During this process, the inner stirring mechanism 4 stirs the silver paste located at the center of the mixing tank 1 and applies a force perpendicular to the bottom of the mixing tank 1, while the outer stirring mechanism 5 stirs the silver paste located on the inner wall of the mixing tank 1 and applies a force in the opposite direction to that of the inner stirring mechanism 4, so that the silver paste located on the wall of the mixing tank 1 moves in the opposite direction to the silver paste inside the mixing tank 1. At this point, a silver paste circulation ring is formed near the wall and center of the mixing tank 1. Multiple silver paste circulation rings are distributed in a ring within the mixing tank 1, thus fully driving the flow of the silver paste within the mixing tank 1. During this process, the cross-shaped stirring paddle 6 on the rotating shaft 32 stirs the silver paste at the bottom of the mixing tank 1, preventing sedimentation and uneven mixing. Finally, the fully stirred silver paste can be discharged through the discharge port 11.

[0040] Each blade of the cross-shaped stirring paddle 6 is configured as a triangular pyramid, and each triangular pyramid is detachably connected to the rotating shaft 32 and its angle can be adjusted. If the cross-shaped stirring paddle 6 is subjected to long-term stirring, it will inevitably be worn. The operator can adjust the angle of the triangular pyramid or replace it to ensure the stirring effect inside the device.

[0041] The fixed bracket 31 ensures that the motor 3 can be stably mounted on the mixing tank cover 2. At the same time, the mixing tank cover 2 can effectively prevent most of the dust or impurities in the air from falling into the mixing tank and causing contamination of the silver paste, thereby improving the quality of silver paste mixing.

[0042] In the above technical solution, a plurality of feet 12 are provided on the outer periphery of the bottom of the mixing tank 1.

[0043] With the above configuration, the multiple feet 12 can maintain the overall stability of the mixing tank 1. At the same time, multiple shock-absorbing sleeves can be fitted under the multiple feet 12, so that when the device vibrates, the shock-absorbing sleeves can reduce the vibration of the device to the ground, thereby protecting the device and reducing noise.

[0044] In the above technical solution, the method by which the mixing tank cover 2 is fixedly installed on the mixing tank 1 can be configured as follows:

[0045] The mixing tank 1 is provided with multiple fixing grooves 22, and the mixing tank cover 2 is provided with fixing ears 23 that match the multiple fixing grooves 22. The fixing ears 23 and the fixing grooves 22 are fixedly connected by bolts 24.

[0046] With the above configuration, the fixing groove 22 and the fixing ear 23 are fixed together by bolts 24, which ensures the structural stability between the mixing tank 1 and the mixing tank cover 2. When the internal mixing structure of the device is damaged, the internal structure of the device can be repaired by removing the bolts 24 and taking off the mixing tank cover 2.

[0047] In the above technical solution, the external stirring mechanism 5 includes: multiple external stirring layers, each external stirring layer including multiple tile-shaped external stirring paddles 51, and each external stirring paddle 51 is fixedly connected to the rotating shaft 32 through a corresponding connecting rod 52;

[0048] Among them, multiple external stirring paddles 51 located in the same vertical direction are connected into an integral structure by scraper 53. The scraper 53 is in clearance fit with the inner wall of the stirring tank 1 (the clearance distance can be set to 0-5mm) so as to scrape the silver paste on the tank wall during rotation.

[0049] With the above configuration, the multiple external stirring blades 51 on the external stirring mechanism 5 can stir the silver paste located near the wall of the mixing tank 1. Simultaneously, when the internal stirring mechanism 4 stirs the silver paste, the connecting rod 52 on the rotating shaft 32 can effectively prevent obstruction of the vertical flow of the silver paste in the center of the mixing tank 1. The gap between the scraper 53 and the inside of the mixing tank 1 is set to 0-5mm, allowing the scraper 53 to scrape the silver paste on the wall of the mixing tank, further ensuring the efficiency of the internal stirring of the silver paste. Furthermore, the external stirring blade 51 is specifically structured as a tile-like shape, thin at both ends and thick in the middle. This allows the edges of the external stirring blade 51 to break up the silver paste to a certain extent when the rotating shaft 32 rotates, enabling the device to better complete the stirring of the silver paste. At the same time, the scraper 53 can adopt a triangular plate structure, which reduces the resistance of the rotating shaft 32 and the external stirring blade 51 when scraping the silver paste on the inner wall of the mixing tank 1, allowing the external stirring mechanism 5 to rotate smoothly.

[0050] In the above technical solution, the internal stirring mechanism 4 includes: multiple internal stirring layers fixedly connected to the rotating shaft 32, which are spaced apart between adjacent external stirring layers, and each internal stirring layer includes multiple fan-shaped internal stirring blades 41, and the stirring direction of the internal stirring blades 41 is opposite to that of the external stirring blades 51.

[0051] With the above configuration, when the rotating shaft 32 rotates, the multiple inner stirring layers on the inner stirring mechanism 4 can fully stir the silver paste in the center of the stirring tank 1. Simultaneously, the inner stirring paddle 41 and the outer stirring paddle 51 stir in opposite directions, which enhances the stirring effect of the silver paste inside the device and drives the silver paste to circulate within the device. The multiple inner stirring layers spaced between the multiple outer stirring layers ensure that the silver paste is stirred more evenly and thoroughly.

[0052] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A silver paste stirring device, comprising: The mixing tank has a discharge port at the bottom; A mixing tank cover is fixedly mounted on the mixing tank, and the mixing tank cover is provided with multiple feed pipes; The motor, which is mounted on the mixing tank lid by a fixed bracket, has its shaft extending into the mixing tank, characterized in that: The rotating shaft is equipped with an inner stirring mechanism for stirring the silver paste located at the center of the mixing tank, and an outer stirring mechanism for stirring the silver paste located near the tank wall inside the mixing tank; the bottom of the rotating shaft is equipped with a cross-shaped stirring paddle for stirring the silver paste at the bottom of the mixing tank.

2. The silver paste stirring device according to claim 1, characterized in that, The mixing tank has multiple feet on its outer perimeter at the bottom.

3. The silver paste stirring device according to claim 1, characterized in that, The method by which the mixing tank cover is fixedly installed on the mixing tank can be configured as follows: The outer wall of the mixing tank opening is provided with multiple fixing grooves, and the mixing tank cover is provided with fixing ears that match the multiple fixing grooves. The fixing ears and fixing grooves are fixedly connected by bolts.

4. The silver paste stirring device according to claim 1, characterized in that, The external stirring mechanism includes: Multiple outer stirring layers, each outer stirring layer includes multiple tile-shaped outer stirring blades, and each outer stirring blade is fixedly connected to the rotating shaft through a corresponding connecting rod; In this structure, multiple external stirring blades located in the same vertical direction are connected into a single structure by scrapers. The scrapers are in clearance fit with the inner wall of the stirring tank to scrape the silver paste on the tank wall during rotation.

5. The silver paste stirring device according to claim 4, characterized in that, The internal stirring mechanism includes: Multiple inner stirring layers are fixedly connected to the rotating shaft and are spaced apart between adjacent outer stirring layers. Each inner stirring layer includes multiple fan-shaped inner stirring blades, and the stirring direction of the inner stirring blades is opposite to that of the outer stirring blades.

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