An electrode slurry filtration device suitable for ultra-thin MLCCs

Abstract

This invention relates to the field of electrode coating technology and discloses an electrode slurry filtration device suitable for ultra-thin MLCCs. An annular baffle is fixedly installed on the inner side of a sleeve, a feed pipe is fixedly installed at the upper end of the sleeve, a column is fixedly installed inside the sleeve, a protruding rod is fixedly installed on the outer side of the column, a filter collecting ring is fixedly installed on the top surface of the inner wall of the sleeve, and a filter assembly is provided inside the sleeve. This device can periodically accelerate the discharge and filtration rate of clean slurry from bottom to top during the filtration process, and can periodically backwash impurities on the filter cloth surface and collect them with the filter collecting ring, preventing excessive impurities in the slurry to be filtered, which would increase viscosity and affect filtration efficiency. It also accelerates the initial speed of the slurry passing through the filter cloth into the empty annular groove, further improving filtration efficiency.

Description

Technical Field

[0001] This invention relates to the field of electrode coating technology, and more particularly to an electrode slurry filtration device suitable for ultra-thin MLCCs. Background Technology

[0002] Ultra-thin MLCCs (Multilayer Ceramic Capacitors), also known as multilayer ceramic capacitors, are core passive components in consumer electronics, automotive electronics, and 5G communications, and are rapidly developing towards miniaturization, thinning, and high integration. This trend places stringent requirements on the cleanliness and dispersion stability of the electrode paste. If impurities ≥0.5μm are present in the electrode paste, such as metal agglomerates, ceramic debris, or organic gels, they can directly pierce the ultra-thin dielectric layer, causing micro-short circuits, or lead to pinholes and uneven thickness in the electrode coating, ultimately resulting in problems such as MLCC capacitance decay, reduced withstand voltage, and reliability failure.

[0003] Therefore, filtering the electrode slurry is a key process step in manufacturing. By removing large agglomerates, foreign matter, gels, or poorly dispersed particles from the slurry, it ensures that the coated electrode film has a uniform microstructure and good surface quality. For example, Chinese Patent CN121041772A discloses an electrode slurry filtering device. During use, the scraper, controlled by the magnetic force between a permanent magnet and a scraper, periodically scrapes away slag to prevent filter cloth clogging, reduce downtime for cleaning, and thus save time on maintenance, significantly improving production efficiency.

[0004] However, the aforementioned and existing related technologies often have the following drawbacks: Because ultrathin MLCC electrode slurries contain nanoscale particles and are prone to agglomeration due to van der Waals forces, flexible filter cloths, such as those made of PE or PP, are typically used. This allows them to adapt to different viscosity characteristics of the slurry, precisely trapping large agglomerated particles while retaining effective small particles during staged filtration. Furthermore, their flexibility reduces disturbance to the slurry system during filtration, preventing secondary particle agglomeration or pore blockage, thus ensuring filtration accuracy and efficiency. However, when the scraper removes the filter cake layer from the surface of the flexible filter cloth, it forces the cloth to deform repeatedly, potentially causing fatigue damage to the fiber structure and disrupting the uniformity and stability of the filter cloth pores. This leads to particle leakage or increased pore blockage during subsequent filtration, reducing the filter cloth's lifespan and filtration accuracy. Additionally, the scraper can compress the filter cake layer, causing localized compaction and allowing it to enter downstream processes with the slurry, affecting the purity and uniformity of the ultrathin MLCC electrode slurry, further reducing filtration efficiency and increasing subsequent cleaning and maintenance costs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the scraper in the prior art cannot effectively clean the filter cake layer on the surface of the filter cloth. To this end, we propose an electrode slurry filtration device suitable for ultra-thin MLCCs.

[0006] To achieve the above objectives, this application adopts the following technical solution: an electrode slurry filtration device suitable for ultra-thin MLCCs, comprising a cylinder and a sleeve disposed on the inner side, an annular partition plate fixedly installed on the inner side of the sleeve, a feed pipe fixedly installed on the upper end of the sleeve, a column fixedly installed inside the sleeve, a protruding rod fixedly installed on the outer side of the column, a filter collecting ring fixedly installed on the top surface of the inner wall of the sleeve, and a filter assembly disposed on the inner side of the sleeve;

[0007] The filter assembly includes a servo motor fixedly connected to the feed pipe. An inner cylinder is fixedly installed at the drive end of the servo motor. Multiple annular grooves I are spaced apart on the outer circumferential surface of the inner cylinder along the axial direction. Multiple annular grooves II are opened through the inner cylinder. The annular grooves II are connected to the adjacent annular grooves I. A frame cylinder is fixedly sleeved on the outer side of the inner cylinder. Multiple sets of filter cloths are spaced apart on the inner side of the frame cylinder. The multiple sets of filter cloths correspond to the multiple annular grooves I. Screwdriver blades are fixedly installed on the outer side of the frame cylinder. Multiple sets of elastic elements are provided on the inner side of the inner cylinder. The drive end of the feed pipe is located on the outer side of the annular partition, and the screwdriver blades and filter collecting rings are located on the inner side of the annular partition.

[0008] The elastic element includes a ring plate that is slidably connected to the ring groove. The ring plate is located in the filter cavity. A pressure block is fixedly installed on one side of the ring plate. A spring is fixedly installed on the surface of the pressure block. The other end of the spring is fixedly connected to the inner wall of the inner cylinder.

[0009] Preferably, multiple protruding rods are spaced apart along the axis of the column, and the protruding rods are at the same horizontal height as the pressure block.

[0010] Preferably, the end of the protruding rod away from the column slides against the inner wall of the inner cylinder, and an inclined surface is provided on one side of the pressure block, with the rotation direction of the protruding rod opposite to the inclined surface.

[0011] Preferably, a telescopic rod is provided on the inner side of the spring, one end of which is fixedly connected to the pressure block, and the other end of which is fixedly connected to the inner wall of the inner cylinder.

[0012] Preferably, a rubber ring is fixedly sleeved on the outer side of the ring plate, and the rubber ring is tightly fitted to one surface of the ring groove.

[0013] Preferably, the upper end of the annular partition is fixedly connected to the sleeve, and a distance is reserved between the lower end of the annular partition and the sleeve.

[0014] Preferably, multiple feed pipes are provided, and the multiple feed pipes are arranged in a circumferential interval with the sleeve as the axis. One end of the feed pipe is connected to the pre-filter chamber, and a flange pipe is fixedly installed at the end of the feed pipe away from the sleeve.

[0015] Preferably, a guide plate is fixedly installed at the lower end of the sleeve, the guide plate corresponds to and is connected to the second annular groove, and a flange pipe is fixedly installed at the lower end of the guide plate.

[0016] Preferably, the inner wall of the inner cylinder is rotatably connected to the column, and both the upper and lower ends of the inner cylinder are rotatably connected to the sleeve.

[0017] Preferably, the upper end of the sleeve is fixedly installed with multiple connecting ears, which are fixedly connected to the inner wall of the sleeve. The multiple connecting ears are arranged in a circular interval with the sleeve as the axis.

[0018] The technical effects and advantages of this invention are as follows: The slurry to be filtered is discharged into the space between the sleeve and the annular partition through the feed pipe and falls under the action of gravity; the servo motor drives the inner cylinder, frame cylinder and auger blades to rotate synchronously and uniformly, pushing the slurry upward between the annular partition and the frame cylinder. After passing through the filter cloth and entering the first annular groove, the slurry is discharged downward through the second annular groove. Because the slurry is viscous, the filtration efficiency is relatively low. The auger blades convey the slurry to fill the cavity between the annular partition and the frame cylinder, creating pressure on the filter cloth to increase the filtration rate.

[0019] When the inner cylinder rotates, the elastic elements from bottom to top sequentially contact the outer protrusions of the column. The protrusions push the pressure block to squeeze the spring, which in turn drives the ring plate to squeeze the clean slurry in the first ring groove. This causes some of the clean slurry to be discharged more quickly through the second ring groove below, thus periodically increasing the discharge rate of the clean slurry from bottom to top during the filtration process, thereby accelerating the subsequent filtration process. Another part of the clean slurry passes through the filter cloth in the opposite direction, periodically backwashing the impurities on the surface of the filter cloth. This not only prevents the filter cloth from forming a filter cake layer due to long-term filtration, which reduces its efficiency, but also allows the detached impurities to return to the main conveying flow of the auger blades and be collected by the top filter ring, preventing excessive impurities in the slurry and increased viscosity from affecting the filtration efficiency.

[0020] After the protruding rod finishes pressing, the spring's reset thrust drives the pressure block and ring plate to return to their original positions quickly. During this process, because the slurry filtration rate is relatively slow, a slight negative pressure adsorption is formed on the filter cloth, which accelerates the initial speed of the slurry passing through the filter cloth and entering the first drain ring groove, further improving the filtration efficiency. Attached Figure Description

[0021] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a cross-sectional schematic diagram of the cylindrical structure of the present invention;

[0024] Figure 3 This is a cross-sectional schematic diagram of the sleeve structure of the present invention;

[0025] Figure 4 This is a cross-sectional view of the sleeve structure and a schematic diagram of the filter assembly of the present invention;

[0026] Figure 5 This is a cross-sectional schematic diagram of the sleeve and filter assembly structure of the present invention;

[0027] Figure 6 This is a bottom view of the filter assembly structure of the present invention;

[0028] Figure 7 This is a cross-sectional schematic diagram of the inner cylinder structure of the present invention.

[0029] Legend: 1. Cylinder; 11. Sleeve; 111. Ring partition; 12. Feed pipe; 13. Flange pipe one; 14. Guide plate; 15. Flange pipe two; 16. Filter ring; 17. Connecting ear; 18. Column; 19. Protruding rod; 2. Filter assembly; 21. Servo motor; 22. Inner cylinder; 221. Ring groove one; 222. Ring groove two; 23. Elastic element; 231. Pressure block; 232. Ring plate; 233. Rubber ring; 234. Spring; 235. Telescopic rod; 24. Frame cylinder; 25. Filter cloth; 26. Screwdriver blade. Detailed Implementation

[0030] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0031] Because ultra-thin MLCC electrode slurries contain nanoscale particles and are prone to agglomeration due to van der Waals forces, flexible filter cloths (such as PE and PP) are used for filter cloth 25. This allows for adaptation to different slurry viscosity characteristics, precisely trapping large agglomerated particles while retaining effective small particles during staged filtration. Furthermore, its flexibility reduces disturbance to the slurry system during filtration, preventing secondary particle agglomeration or filter media pore blockage, thus ensuring filtration accuracy and efficiency. However, when the scraper removes the filter cake layer from the surface of the flexible filter cloth 25, it forces the cloth to deform repeatedly, potentially causing fiber fatigue damage and disrupting the uniformity and stability of the filter cloth 25's pores. This leads to particle leakage or increased pore blockage during subsequent filtration, reducing the filter cloth 25's lifespan and filtration accuracy. It also causes localized compaction of the filter cake layer, allowing it to enter downstream processes with the slurry, affecting the purity and uniformity of the ultra-thin MLCC electrode slurry, further reducing filtration efficiency and increasing subsequent cleaning and maintenance costs. To address this issue, [further details are needed]. Figures 1-7As shown, the present invention provides a technical solution: an electrode slurry filtration device suitable for ultra-thin MLCCs, including a cylinder 1 and a sleeve 11 disposed on the inner side. A ring partition 111 is fixedly installed on the inner side of the sleeve 11, a feed pipe 12 is fixedly installed on the upper end of the sleeve 11, a column 18 is fixedly installed inside the sleeve 11, a protruding rod 19 is fixedly installed on the outer side of the column 18, a filter collecting ring 16 is fixedly installed on the top surface of the inner wall of the sleeve 11, and a filter assembly 2 is disposed on the inner side of the sleeve 11.

[0032] The filter assembly 2 includes a servo motor 21 fixedly connected to the feed pipe 12. The drive end of the servo motor 21 is fixedly installed with an inner cylinder 22. Multiple annular grooves 221 are spaced apart on the outer circumferential surface of the inner cylinder 22 along the axial direction. Multiple annular grooves 222 are opened through the inner cylinder 22. The annular grooves 222 are connected to the adjacent annular grooves 221. A frame cylinder 24 is fixedly sleeved on the outer side of the inner cylinder 22. Multiple sets of filter cloths 25 are spaced apart on the inner side of the frame cylinder 24. The multiple sets of filter cloths 25 correspond to the multiple annular grooves 221. Screwdriver blades 26 are fixedly installed on the outer side of the frame cylinder 24. Multiple sets of elastic elements 23 are provided on the inner side of the inner cylinder 22. The drive end of the feed pipe 12 is located on the outer side of the annular partition 111. The screwdriver blades 26 and the filter collecting ring 16 are located on the inner side of the annular partition 111.

[0033] The elastic element 23 includes an annular plate 232 slidably connected to the annular groove 221. The annular plate 232 is located in the filter chamber. A pressure block 231 is fixedly installed on one side of the annular plate 232. A spring 234 is fixedly installed on the surface of the pressure block 231. The other end of the spring 234 is fixedly connected to the inner wall of the inner cylinder 22. First, the feed pipe 12 discharges the slurry to be filtered into the spacer 11 and the annular partition 111, so that the slurry falls by itself under the action of gravity. At the same time, the servo motor 21 drives the inner cylinder 22 and its outer frame cylinder 24 and auger blades 26 to rotate synchronously and slowly at a uniform speed, thereby causing the slurry to gradually rise between the annular partition 111 and the frame cylinder 24. Under the action of gravity, the slurry passes through the filter cloth 25 and enters the corresponding annular groove 221, and is discharged downward by itself through the annular groove 222. Since the slurry is in the form of The viscous state results in a relatively slow filtration efficiency. Therefore, under the continuous conveying of the auger blades 26, the slurry will fill the cavity between the annular partition 111 and the frame cylinder 24, and form a certain pressure on the surface of the filter cloth 25 to improve the filtration rate of the slurry. At the same time, during the rotation of the inner cylinder 22, the elastic element 23 from bottom to top will contact the protruding rod 19 on the outside of the column 18 in sequence. Then, the protruding rod 19 will push the pressure block 231 to squeeze the spring 234, and simultaneously push the annular plate 232 to squeeze the clean slurry in the first annular groove 221. This will cause a portion of the clean slurry to be able to pass through and be discharged from the second annular groove 222 below it. Thus, during the filtration process, the discharge rate of the clean slurry will be periodically accelerated from bottom to top. The corresponding acceleration of the discharge rate will further accelerate the filtration rate of the subsequent slurry. Meanwhile, the other part of the clean slurry passes through the filter cloth 25 in the reverse direction, periodically backwashing the impurities on the surface of the filter cloth 25. On the one hand, this effectively prevents the formation of a filter cake layer on the surface of the filter cloth 25 under long-term filtration, which would reduce the subsequent filtration efficiency. On the other hand, the impurities that are backwashed will detach from the surface of the filter cloth 25 and return to the main conveying flow of the auger blades 26 until they are collected by the collection ring 16 at the top of the impurity conveying flow. This prevents the slurry to be filtered from having too many impurities, which would increase viscosity and affect the filtration efficiency. When the protruding rod 19 stops squeezing the pressure block 231, the spring 234 pushes the pressure block 231 to drive the ring plate 232 back to its initial position quickly. During this process, because the filtration rate of the slurry is relatively slow, a slight negative pressure adsorption will be generated on the filter cloth 25, thereby accelerating the initial speed of the slurry passing through the filter cloth 25 and entering the empty ring groove 221, further improving the filtration efficiency.

[0034] In addition, multiple convex rods 19 are spaced apart along the axis of the column 18. The convex rods 19 and the pressure block 231 are at the same horizontal height. The end of the convex rod 19 away from the column 18 slides against the inner wall of the inner cylinder 22. An inclined surface is opened on one side of the pressure block 231. The rotation direction of the convex rod 19 is opposite to the inclined surface. The precise horizontal alignment and axial spacing of multiple sets of convex rods 19 and the pressure block 231 can realize the orderly and sequential triggering of each layer of elastic elements 23 from bottom to top when the inner cylinder 22 rotates. This ensures that the backwashing action of each filter cloth 25 and the accelerated discharge of clean slurry do not interfere with each other, and ensures the coordinated and efficient operation of the multi-layer filtration unit. This improves the overall uniformity of filtration. Furthermore, the opposing arrangement of the inclined surface of the pressure block 231 and the rotation direction of the protruding rod 19 allows the protruding rod 19 to smoothly cut into the inclined surface and accurately apply thrust. This not only significantly reduces the impact wear when the two come into contact and extends the service life of the components, but also efficiently converts the rotational kinetic energy of the protruding rod 19 into the linear thrust of the compression spring 234. This ensures that the compression force of the ring plate 232 on the clean slurry is stable and controllable, thereby ensuring the consistency of the backwash strength of the filter cloth 25 and the stability of the clean slurry discharge rate. This effectively avoids incomplete backwashing of the filter cloth 25, excessive local slurry disturbance, or secondary agglomeration of particles caused by uneven force.

[0035] In addition, a telescopic rod 235 is provided on the inner side of the spring 234. One end of the telescopic rod 235 is fixedly connected to the pressure block 231, and the other end of the telescopic rod 235 is fixedly connected to the inner wall of the inner cylinder 22. The telescopic rod 235 can accurately guide and limit the extension and retraction of the spring 234, effectively avoiding problems such as lateral displacement and torsional deformation of the spring 234 during the compression or reset and rebound process of the pressure block 231. This ensures that the spring 234 always extends and retracts stably along the axial direction, ensuring that the spring 234 transmits the thrust and rebound force of the pressure block 231 accurately and evenly, further enhancing the guarantee of the filtration accuracy and efficiency of ultra-thin MLCC electrode slurry and reducing equipment maintenance costs.

[0036] A rubber ring 233 is fixedly sleeved on the outside of the ring plate 232. The rubber ring 233 is in close contact with the surface of the annular groove 221. The rubber ring 233 can form a reliable sealing barrier. The tightly fitted rubber ring 233 can enhance the squeezing effect of the ring plate 232 on the clean slurry in the annular groove 221, so that the squeezing force is concentrated on the clean slurry, ensuring the efficient realization of the function of accelerating the discharge of clean slurry and backflushing the filter cloth 25, thereby improving the filtration efficiency.

[0037] The upper end of the annular partition 111 is fixedly connected to the sleeve 11, and a distance is reserved between the lower end of the annular partition 111 and the sleeve 11. Multiple feed pipes 12 are provided, and the multiple feed pipes 12 are arranged in a circular interval with the sleeve 11 as the axis. One end of the feed pipe 12 is connected to the pre-filter chamber, and a flange pipe 13 is fixedly installed at the end of the feed pipe 12 away from the sleeve 11. A guide plate 14 is fixedly installed at the lower end of the sleeve 11. The guide plate 14 corresponds to and is connected to the second annular groove 222. A flange pipe 15 is fixedly installed at the lower end of the guide plate 14. The reserved distance at the lower end of the annular partition 111 can ensure that the slurry flows smoothly to the lower part of the auger blade 26 under the action of gravity, and at the same time, it cooperates with the multiple feed pipes 12 distributed in a circular pattern. 2. It can achieve uniform and dispersed feeding of slurry, avoiding local slurry accumulation or uneven flow rate caused by single feeding, ensuring balanced stress and filtration load of each filtration unit, and improving overall filtration uniformity; and the flange pipe 13 at the end of the feed pipe 12 facilitates quick and accurate docking with upstream feeding equipment, reducing installation and debugging difficulty and improving equipment adaptability; and the corresponding connection design between the guide plate 14 and the annular groove 222 can centrally collect and guide the filtered clean slurry for output, avoiding the risk of residue or mixing caused by disordered flow of clean slurry, further ensuring slurry purity, while the flange pipe 15 at the lower end of the guide plate 14 provides a convenient interface for slurry transportation in downstream processes, improving the connection efficiency between equipment and production line.

[0038] The inner wall of the inner cylinder 22 is rotatably connected to the column 18, and both the upper and lower ends of the inner cylinder 22 are rotatably connected to the sleeve 11. Multiple connecting ears 17 are fixedly installed on the upper end of the sleeve 11. The connecting ears 17 are fixedly connected to the inner wall of the cylinder 1. The multiple connecting ears 17 are arranged in a circular interval with the sleeve 11 as the axis. Through the multi-point rotatable connection and cooperation between the inner cylinder 22, the column 18, and the sleeve 11, the rotation of the inner cylinder 22 can be accurately guided and stably supported, effectively avoiding eccentric shaking or displacement during the rotation of the inner cylinder 22, ensuring that the filtration action is carried out in an orderly manner, and providing structural guarantee for the long-term stable operation of the filtration equipment.

[0039] Working principle: First, the feed pipe 12 discharges the slurry to be filtered into the spacer 11 and the annular baffle 111, allowing the slurry to fall under gravity. Simultaneously, the servo motor 21 drives the inner cylinder 22 and its outer frame cylinder 24 and auger blades 26 to rotate synchronously and slowly at a uniform speed, causing the slurry to gradually rise between the annular baffle 111 and the frame cylinder 24. Under gravity, the slurry passes through the filter cloth 25 and enters the corresponding annular groove 221, and then flows downward through the annular groove 222. Because the slurry is viscous, the filtration efficiency is relatively slow. Therefore, with the continuous conveying of the auger blades 26, the slurry will gradually rise between the annular baffle 111 and the frame cylinder 24. The cavity between them is filled, and a certain pressure is formed on the surface of the filter cloth 25 to improve the filtration rate of the slurry. At the same time, during the rotation of the inner cylinder 22, the elastic element 23 from bottom to top will contact the protruding rod 19 on the outside of the column 18 in sequence. Then, the protruding rod 19 pushes the pressure block 231 to squeeze the spring 234, and simultaneously pushes the ring plate 232 to squeeze the clean slurry in the first ring groove 221. This causes a part of the clean slurry to be able to pass through the second ring groove 222 below it and be discharged. Thus, during the filtration process, the discharge rate of the clean slurry is periodically accelerated from bottom to top. The corresponding acceleration of the discharge rate further accelerates the filtration rate of the subsequent slurry. Meanwhile, the other part of the clean slurry passes through the filter cloth 25 in the reverse direction, periodically backwashing the impurities on the surface of the filter cloth 25. On the one hand, this effectively prevents the formation of a filter cake layer on the surface of the filter cloth 25 under long-term filtration, which would reduce the subsequent filtration efficiency. On the other hand, the impurities that are backwashed will detach from the surface of the filter cloth 25 and return to the main conveying flow of the auger blades 26 until they are collected by the collection ring 16 at the top of the impurity conveying flow. This prevents the slurry to be filtered from having too many impurities, which would increase viscosity and affect the filtration efficiency. When the protruding rod 19 stops squeezing the pressure block 231, the spring 234 pushes the pressure block 231 to drive the ring plate 232 back to its initial position quickly. During this process, because the filtration rate of the slurry is relatively slow, a slight negative pressure adsorption will be generated on the filter cloth 25, thereby accelerating the initial speed of the slurry passing through the filter cloth 25 and entering the empty ring groove 221, further improving the filtration efficiency.

[0040] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. An electrode slurry filtration device suitable for ultra-thin MLCCs, characterized in that: The device includes a cylindrical body and an inner sleeve. An annular baffle is provided on the inner side of the sleeve. A feed pipe is fixedly installed at the upper end of the sleeve. A column is fixedly installed inside the sleeve. A protruding rod is fixedly installed on the outer side of the column. A filter ring is fixedly installed on the top surface of the inner wall of the sleeve. A filter assembly is provided on the inner side of the sleeve. The filtration assembly includes a servo motor fixedly connected to the feed pipe. An inner cylinder is fixedly installed at the drive end of the servo motor. Multiple annular grooves are spaced apart on the outer circumferential surface of the inner cylinder along the axial direction. Multiple annular grooves are through-cut inside the inner cylinder. The annular grooves are connected to adjacent annular grooves. A frame cylinder is fixedly sleeved on the outer side of the inner cylinder. Multiple sets of filter cloths are spaced apart on the inner side of the frame cylinder. The multiple sets of filter cloths correspond to the multiple annular grooves. Screwdriver blades are fixedly installed on the outer side of the frame cylinder. Multiple sets of elastic elements are provided on the inner side of the inner cylinder. The drive end of the feed pipe is located outside the annular partition. The screwdriver blades and the filter collecting ring are located inside the annular partition. The elastic element includes a ring plate that is slidably connected to the annular groove. The ring plate is located in the filter cavity. A pressure block is fixedly installed on one side of the ring plate. A spring is fixedly installed on the surface of the pressure block. The other end of the spring is fixedly connected to the inner wall of the inner cylinder.

2. The electrode slurry filtration device for ultra-thin MLCCs according to claim 1, characterized in that: Multiple protruding rods are spaced apart along the axis of the column, and the protruding rods are at the same horizontal height as the pressure block.

3. The electrode slurry filtration device for ultra-thin MLCCs according to claim 2, characterized in that: The end of the protruding rod away from the column slides against the inner wall of the inner cylinder, and an inclined surface is provided on one side of the pressure block. The rotation direction of the protruding rod is opposite to the inclined surface.

4. The electrode slurry filtration device for ultra-thin MLCCs according to claim 1, characterized in that: A telescopic rod is provided on the inner side of the spring. One end of the telescopic rod is fixedly connected to the pressure block, and the other end of the telescopic rod is fixedly connected to the inner wall of the inner cylinder.

5. The electrode slurry filtration device for ultra-thin MLCCs according to claim 1, characterized in that: A rubber ring is fixedly sleeved on the outer side of the ring plate, and the rubber ring is tightly fitted to one surface of the ring groove.

6. The electrode slurry filtration device for ultra-thin MLCCs according to claim 1, characterized in that: The upper end of the annular partition is fixedly connected to the sleeve, and a distance is reserved between the lower end of the annular partition and the sleeve.

7. The electrode slurry filtration device for ultra-thin MLCCs according to claim 1, characterized in that: Multiple feed pipes are provided, and the multiple feed pipes are arranged in a circular interval with the sleeve as the axis. One end of the feed pipe is connected to the pre-filter chamber, and a flange pipe is fixedly installed at the end of the feed pipe away from the sleeve.

8. The electrode slurry filtration device for ultra-thin MLCCs according to claim 1, characterized in that: A guide plate is fixedly installed at the lower end of the sleeve. The guide plate corresponds to and is connected to the second annular groove. A flange pipe is fixedly installed at the lower end of the guide plate.

9. The electrode slurry filtration device for ultra-thin MLCCs according to claim 1, characterized in that: The inner wall of the inner cylinder is rotatably connected to the column, and both the upper and lower ends of the inner cylinder are rotatably connected to the sleeve.

10. The electrode slurry filtration device for ultra-thin MLCCs according to claim 1, characterized in that: The upper end of the sleeve is fixedly equipped with multiple connecting ears, which are fixedly connected to the inner wall of the cylinder. The multiple connecting ears are arranged in a circular interval with the sleeve as the axis.

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