A silver powder screening device

Abstract

A silver powder screening device, including: screening box, the top of screening box is provided with taper structure's feed inlet, the screening frame that is arranged obliquely in screening box inside, the collection box that is arranged in screening frame bottom, the front and back two sides sidewall of screening frame is connected with corresponding inside sidewall of screening box through the connecting rod that is arranged in pairs, both ends of connecting rod are rotatably connected with screening frame and screening box, still include: multiple baffles that are arranged on both sides wall of screening frame and guide silver powder transmission, multiple baffles are alternately arranged in the two sides of screening frame inner wall, wherein, each baffle is hinged with screening frame inner wall, and is provided with torsional spring on the hinged shaft, and the gap for silver powder to pass through is formed between the relative two baffles. The utility model discloses through alternately hinged setting multiple baffles with torsional spring on both sides wall of screening frame, can effectively delay the sliding speed of silver powder in the oblique screening frame, prolongs the contact time of silver powder and screen, guarantees silver powder screening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of screening device technology, and in particular to a silver powder screening device. Background Technology

[0002] In industrial fields such as electronic pastes and conductive coatings, the particle size uniformity of silver powder directly affects the conductivity and mechanical strength of the products, making the silver powder screening process crucial. Traditional silver powder screening devices mostly employ an inclined fixed screen structure, relying on the vibration of the screening frame to force the silver powder through the screen holes for classification. However, such devices have significant limitations in practical applications: on the one hand, a large amount of silver powder tends to slide rapidly down a straight line within the inclined screening frame, easily accumulating at the bottom of the frame and resulting in low screening efficiency; for example, a screening device for preparing nano-silver powder disclosed in patent application number CN202122067819.8 does not have guide plates or baffles in the screening frame, causing the silver powder to fall rapidly during screening, requiring multiple filtrations to complete the screening process, increasing filtration time and reducing screening efficiency. Meanwhile, existing devices sometimes add multiple guide plates inside the screening frame to slow down the falling speed of the silver powder, ensuring that the silver powder falls rapidly during screening. While the distribution inside the frame is more uniform, when a large amount of silver powder enters the screening frame simultaneously, the fixed-angle guide plate causes the silver powder to accumulate in the upper part of the screening frame, preventing it from being evenly distributed in time. This affects the subsequent screening process and results in low silver powder filtration efficiency. For example, in a silver powder screening machine disclosed in patent application number CN202221244419.8, the guide plate angle is fixed. Although this can slow down the fall of silver powder and distribute it evenly, when a large amount of silver powder enters at the beginning of feeding, the fixed-angle guide plate causes the newly entered silver powder to accumulate at the front end of the screening frame, affecting the silver powder screening efficiency. Summary of the Invention

[0003] 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. To achieve these objectives and other advantages according to the present invention, a silver powder screening device is provided, comprising: a screening box, a tapered inlet at the top of the screening box, a screening frame inclinedly disposed inside the screening box, and a collection box disposed at the bottom of the screening frame. The front and rear side walls of the screening frame are connected to the corresponding inner side walls of the screening box via paired connecting rods, the two ends of the connecting rods being rotatably connected to the screening frame and the screening box, respectively. The device further comprises: multiple baffles on the side walls of the screening frame for guiding the transfer of silver powder, the multiple baffles being alternately disposed on both sides of the inner wall of the screening frame. Each baffle is hinged to the inner wall of the screening frame, and a torsion spring is provided on the hinge shaft. There is a gap between the two baffles for silver powder to pass through.

[0004] Preferably, it also includes: a vibration motor I disposed on the outer wall of the screening box, the output end of the vibration motor I abutting against one side of the screening frame.

[0005] Preferably, it also includes: a vibration motor II disposed on the inner side of the top of the screening box; A connecting beam is provided in the middle of the filter box; The output end of the vibration motor II abuts against the connecting crossbeam, and the connecting crossbeam is provided with a sliding groove I that matches the output end of the vibration motor II. The side wall of the screening frame is provided with a sliding groove II that matches the output end of the vibration motor I.

[0006] Preferably, the screening box has an opening I on one side, and the screening frame has a discharge end I extending out of the opening I on one side; The size of the discharge end I is smaller than the size of the opening I, and a guide plate that cooperates with the discharge end I is provided inside the screening frame.

[0007] Preferably, the front end of the screening box is provided with an opening II for the discharge end II of the collection box to extend out; The discharge end II of the collection box is located below the discharge end I.

[0008] Preferably, the discharge end II of the collection box and the discharge end I of the screening frame are located on different sides of the screening box.

[0009] This utility model has at least the following beneficial effects: by alternately hinged baffles with torsion springs on both sides of the screening frame, when a large amount of silver powder enters, the gap between the two baffles can be widened, allowing the silver powder to fall faster and preventing a large amount of silver powder from accumulating at the top of the screening frame. At the same time, the multiple alternately arranged baffles can effectively slow down the sliding speed of the silver powder in the inclined screening frame, prolong the contact time between the silver powder and the screening frame, and ensure the silver powder screening efficiency.

[0010] 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: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a cross-sectional view of the present invention without a cleaning component; Figure 4 This is a schematic diagram of the spatial structure of the screening frame and collection box of this utility model; Figure 5This is a schematic diagram of the baffle structure.

[0011] Reference numerals: 1. Screening box, 2. Feed inlet, 3. Screening frame, 4. Collection box, 5. Connecting rod, 6. Baffle, 7. Hinge shaft, 8. Torsion spring, 9. Vibration motor I, 10. Vibration motor II, 11. Connecting beam, 12. Discharge end I, 13. Guide plate, 14. Discharge end II, 21. Brush bristles. Detailed implementation method: 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. 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. It should be noted that in the description of the present invention, the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and 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 the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. 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 through an intermediate medium. Moreover, "above," "on top of," and "on top" 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.

[0012] like Figure 1A silver powder screening device is shown, comprising: a screening box 1, a tapered inlet 2 at the top of the screening box 1, a screening frame 3 inclined inside the screening box 1, and a collection box 4 at the bottom of the screening frame 3. The front and rear side walls of the screening frame 3 are connected to the corresponding inner side walls of the screening box 1 by paired connecting rods 5. The two ends of the connecting rods 5 are rotatably connected to the screening frame 3 and the screening box 1, respectively. The device also includes: multiple baffles 6 on the side walls of the screening frame 3 to guide the silver powder transfer, and the multiple baffles 6 are alternately arranged on both sides of the inner wall of the screening frame 3. Each baffle 6 is hinged to the inner wall of the screening frame 3, and a torsion spring 8 is provided on the hinge shaft 7, with a gap between the two baffles 6 for silver powder to pass through.

[0013] Working principle: The operator pours silver powder into the screening box 1 through the feed inlet 2. When a large amount of silver powder enters the screening frame 3, the silver powder is transported downward along the inclined screening frame 3 under the action of gravity. During transmission, the silver powder comes into contact with the baffles 6 alternately arranged on both sides of the screening frame 3. Since the baffles 6 are connected to the inner wall of the screening frame 3 through the hinge shaft 7 and the hinge shaft 7 is equipped with a torsion spring 8, when the silver powder impacts the baffles 6, the baffles 6 will rotate and compress the torsion spring 8. The restoring force of the torsion spring 8 will cause the baffles 6 to rebound, preventing a large amount of silver powder from accumulating at the top of the screening frame 3 after entering the frame. The silver powder moves continuously towards the bottom of the screening frame 3 through the gap between the two baffles 6. When a small amount of silver powder enters, the hinged baffles 6 will not change, but will only guide the falling path of the silver powder and optimize the falling path of the silver powder, ensuring the contact time between the silver powder and the screening frame 3 and ensuring the screening efficiency of the silver powder. The baffles 6 hinged to the torsion spring 8 ensure that when a large amount of silver powder enters, the gap between the two baffles 6 can be widened, allowing the silver powder to fall faster and preventing a large amount of silver powder from accumulating at the top of the screening frame 3.

[0014] The above technical solution also includes a vibration motor I9 mounted on the outer wall of the screening box 1, with the output end of the vibration motor I9 abutting against one side of the screening frame 3. Using this technical solution, the periodic vibration generated by the vibration motor I9 during operation is directly transmitted to the screening frame 3. With the cooperation of paired connecting rods 5, the connecting rods 5 are rotatably connected to the screening frame 3 and the screening box 1, causing the screening frame 3 to vibrate left and right in space, perpendicular to the direction of silver powder transmission. This ensures that after the silver powder is poured into the screening frame 3, the screening frame 3 vibrates left and right in space, guaranteeing both the screening of the silver powder and its even distribution within the screening frame 3, preventing the silver powder from accumulating in a particular area. This allows more silver powder to fully contact the screen, greatly improving the screening coverage.

[0015] The above technical solution also includes: a vibration motor II 10 disposed on the inner side of the top of the screening box 1; a connecting beam 11 disposed in the middle of the screening frame 3; wherein, the output end of the vibration motor II 10 abuts against the connecting beam 11, the connecting beam 11 is provided with a sliding groove I adapted to the output end of the vibration motor II 10, and the side wall of the screening frame 3 is provided with a sliding groove II adapted to the output end of the vibration motor I 9. Using the above technical solution, after the screening work is completed, the vibration motor II 10 is started, and its output end transmits vibration to the middle of the screening frame 3 through the connecting beam 11, and then diffuses to the entire screen. Since the vibration motor II 10 acts directly on the core area of ​​the screening frame 3, the generated vibration energy is concentrated and efficient, and can form a strong impact on the surface of the screen and the silver powder remaining in the screen holes. This causes the silver powder particles blocking the screen holes to be shaken off, thereby quickly cleaning the screen and avoiding the residual silver powder affecting the accuracy and efficiency of the next screening. The vibration of the vibration motor II 10 can quickly clean the screening frame 3. The slide groove I (not shown in the figure) ensures that when the vibration motor II 10 is working, the output end of the vibration motor I 9 has displacement space in the slide groove I, avoiding rigid interference with the side wall of the screening frame 3. The slide groove II ensures that when the vibration motor I 9 is working, the output end of the vibration motor II 10 has displacement space in the slide groove II (not shown in the figure), avoiding rigid interference with the connecting beam 11.

[0016] In the above technical solution, the screening box 1 has an opening I on one side, and the screening frame 3 has a discharge end I12 extending out of the opening I on one side. The size of the discharge end I12 is smaller than the size of the opening I, and a guide plate 13 that cooperates with the discharge end I12 is provided inside the screening frame 3. Using the above technical solution, the guide plate 13 can guide the larger silver powder particles remaining after screening to flow accurately to the discharge end I12, preventing them from accumulating and stagnating inside the screening frame 3. The structure of the discharge end I12 extending into the opening I ensures that the larger silver powder particles are directly discharged outside the screening box 1. The smaller size of the discharge end I12 compared to the opening I reduces the possibility of external impurities entering the screening box 1 through the opening I, while also providing sufficient space for the vibration of the screening frame 3, preventing collisions and interference between the discharge end I12 and the edge of the opening I, and ensuring the stability of the device operation.

[0017] In the above technical solution, the front end of the screening box 1 is provided with an opening II for the discharge end II14 of the collection box 4 to extend out; wherein, the discharge end II14 of the collection box 4 is located below the discharge end I12. By adopting the above technical solution, the discharge end II14 of the collection box 4 extends from the opening II, which facilitates the operator to directly collect and process the screened, clean silver powder that meets the requirements from outside the screening box 1. This simplifies the operation process and improves work efficiency. Furthermore, the layout of the discharge end II14 of the collection box 4 located below the discharge end I12 avoids spatial interference between impurities or larger particles of silver powder discharged from the discharge end I12 and the fine particles of silver powder inside the collection box 4, thus preventing subsequent collection from being affected.

[0018] In the above technical solution, the discharge end II14 of the collection box 4 and the discharge end I12 of the screening frame 3 are located on different sides of the screening box 1. By adopting this technical solution, placing the discharge end II14 of the collection box 4 and the discharge end I12 of the screening frame 3 on different sides of the screening box 1 further optimizes the silver powder collection process and avoids confusion between silver powders of different particle sizes during collection. Because they are located on different sides, operators can process the silver powder that meets the requirements (collected from the discharge end II14 of the collection box 4) and larger particles of silver powder or impurities (collected from the discharge end I12 of the screening frame 3) at their respective locations, reducing mutual interference during operation.

[0019] Wherein, the baffle 6 is fitted with the screen mesh at the bottom of the screening frame 3 with a gap, and the bottom of the baffle 6 is provided with bristles 21. With this technical solution, the gap fit between the baffle 6 and the screen mesh can ensure that the baffle 6 will not interfere with the screen mesh when it rotates. The bristles 21 at the bottom of the baffle 6 ( Figure 5 The bristles 21 appear sparse, but in reality they are densely arranged. They can prevent silver powder from sliding directly through the gaps in the baffle 6 without affecting the rotational flexibility of the baffle 6. At the same time, as the baffle 6 rotates, the bristles 21 at the bottom can clean the surface of the screen, preventing material from accumulating and clogging on the screen, and ensuring the smooth progress of the screening process.

[0020] 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 powder screening device, comprising: A screening box, wherein a tapered feed inlet is provided at the top of the screening box, a screening frame is inclinedly arranged inside the screening box, and a collection box is arranged at the bottom of the screening frame. The front and rear side walls of the screening frame are connected to the corresponding inner side walls of the screening box through paired connecting rods. The two ends of the connecting rods are rotatably connected to the screening frame and the screening box, respectively. The feature is that it further includes: multiple baffles are provided on the side walls of the screening frame to guide the transfer of silver powder. The multiple baffles are alternately arranged on both sides of the inner wall of the screening frame. Each baffle is hinged to the inner wall of the screening frame, and a torsion spring is provided on the hinge shaft. There is a gap between the two baffles for silver powder to pass through.

2. The silver powder screening device according to claim 1, characterized in that, Also includes: A vibration motor I is installed on the outer wall of the screening box, and the output end of the vibration motor I abuts against one side of the screening frame.

3. The silver powder screening device according to claim 2, characterized in that, Also includes: Vibration motor II is installed inside the top of the screening box; A connecting beam is provided in the middle of the filter box; The output end of the vibration motor II abuts against the connecting crossbeam, and the connecting crossbeam is provided with a sliding groove I that matches the output end of the vibration motor II. The side wall of the screening frame is provided with a sliding groove II that matches the output end of the vibration motor I.

4. The silver powder screening device according to claim 1, characterized in that, The screening box has an opening I on one side, and the screening frame has a discharge end I extending out of the opening I on one side. The size of the discharge end I is smaller than the size of the opening I, and a guide plate that cooperates with the discharge end I is provided inside the screening frame.

5. The silver powder screening device according to claim 4, characterized in that, The front end of the screening box is provided with an opening II for the discharge end II of the collection box to extend out; The discharge end II of the collection box is located below the discharge end I.

6. The silver powder screening device according to claim 5, characterized in that, The discharge end II of the collection box and the discharge end I of the screening frame are located on different sides of the screening box.

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