A multi-layer superimposed silicon carbide ceramic filter and a needle punching hole forming device

Abstract

The utility model discloses a kind of multi-layer superimposed silicon carbide ceramic filters, specifically relates to silicon carbide ceramic filter field, including ceramic filter body, the ceramic filter body includes upper layer silicon carbide plate, the lower end of the upper layer silicon carbide plate is connected with middle layer silicon carbide plate, the lower layer silicon carbide plate is connected with lower layer silicon carbide plate below middle layer silicon carbide plate, a kind of multi-layer superimposed silicon carbide ceramic filter's needle punching plastic hole processing device is also disclosed, including processing equipment, the processing equipment includes workbench, the lower end of the workbench is connected with driving mechanism, the middle part of one side of the workbench is connected with down-pressure mechanism, the lower end of the down-pressure mechanism is connected with needle punching mechanism, the utility model is reinforced by multi-layer silicon carbide plate grading filtration and adhesive cover structure, combined with the flexible adjustment of needle punching plastic hole device, reaches the technical effect of promoting aluminium liquid filtration cleanliness, enhancing filter structural stability, improve silicon carbide plate processing efficiency and adaptability simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of silicon carbide ceramic filter technology, and more specifically, to a multi-layer stacked silicon carbide ceramic filter and a needle-punching plastic hole processing device. Background Technology

[0002] In the field of precision aluminum alloy casting, silicon carbide ceramic filters are key components for improving the cleanliness of molten aluminum. Their core function is to intercept impurities such as oxide inclusions and metal shavings in the molten aluminum, reducing surface defects and internal porosity of castings. Currently, most silicon carbide ceramic filters on the market are single-layer structures, achieving filtration only through a single pore size. This results in a difficulty in balancing filtration accuracy and flow efficiency. Under the impact of molten aluminum, interlayer separation or leakage is prone to occur, causing unfiltered molten aluminum to directly mix into clean molten aluminum, seriously affecting filtration reliability. At the same time, the overall structural strength is insufficient, making it easy to break during use and resulting in a short service life. In the processing of silicon carbide ceramic filters, the needle punching process is the core step that determines the filter hole accuracy and production efficiency. Currently, the installation and position adjustment of needles in mainstream processing equipment have significant limitations. The needles are mostly fixedly connected to the processing mechanism, and their distribution position is fixed after leaving the factory. No matter how many batches of silicon carbide plates are processed, the arrangement trajectory of the filter holes on the plate surface and the relative positions of needles of different diameters are completely consistent. It is impossible to adjust according to the design requirements of the staggered distribution of filter holes between filter layers to improve the impurity removal rate. As a result, after the processed silicon carbide plates are assembled into multi-layer filters, the filter holes between layers are prone to being aligned. Molten aluminum can easily pass directly through the multi-layer filter holes, reducing the probability of impurity interception. On the other hand, even if some equipment is equipped with needles of different diameters, it is necessary to manually disassemble and replace them to process filter holes of different diameters. This is not only time-consuming, labor-intensive, and inefficient, but the position of the needles cannot be flexibly adjusted after replacement, making it difficult to adapt to diverse filter hole arrangement requirements. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-layer stacked silicon carbide ceramic filter and a needle-punching plastic hole processing device.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A multi-layer stacked silicon carbide ceramic filter includes a ceramic filter body, the ceramic filter body includes an upper silicon carbide plate, a middle silicon carbide plate is connected to the lower end of the upper silicon carbide plate, and a lower silicon carbide plate is connected below the middle silicon carbide plate.

[0005] Preferably, the outer walls of the upper silicon carbide plate, the middle silicon carbide plate, and the lower silicon carbide plate are connected by adhesive sleeves, and the adhesive sleeves are sleeved on the outer walls of the upper silicon carbide plate, the middle silicon carbide plate, and the lower silicon carbide plate.

[0006] Preferably, the upper, middle and lower silicon carbide plates are uniformly provided with filter holes at their upper ends, and the filter holes have different diameters.

[0007] A needle-punching and perforation processing device for a multi-layer stacked silicon carbide ceramic filter includes a processing equipment. The processing equipment includes a worktable, a driving mechanism connected to the lower end of the worktable, a rotating plate connected to the upper end of the driving mechanism, and the rotating plate rotating above the worktable. Placement platforms are circumferentially connected to the upper end of the rotating plate. A pressing mechanism is connected to the middle of one side of the worktable, and a needle-punching mechanism is connected to the lower end of the pressing mechanism. The needle-punching mechanism is used to punch holes in the upper, middle, and lower silicon carbide plates.

[0008] Preferably, the driving mechanism includes a frame, a drive motor is connected to the lower end of the worktable, a rotating rod is connected to the output end of the drive motor, the upper end of the rotating rod extends through to the upper end of the worktable, and the rotating rod is connected to the middle of the lower end of the rotating plate.

[0009] Preferably, the pressing mechanism includes a support frame, one side of which is connected to the middle of one side of the workbench, a cylinder is connected to one side of the support frame, and a moving block is connected to the lower end of the cylinder.

[0010] Preferably, the needle-punching mechanism includes a connecting cylinder, a housing connected to the middle of one side of the connecting cylinder, a connecting motor connected to the upper side of the housing, the output end of the connecting motor extending through into the housing, a connecting gear connected to the outer wall of the output end of the connecting motor, one end of the connecting gear extending through into the connecting cylinder, the lower part of the connecting cylinder being hollow, an opening being provided on one side of the connecting cylinder corresponding to the connecting gear, an external gear ring meshing with one side of the connecting gear, a rotating ring connected to the lower end of the external gear ring, the rotating ring being located below the connecting cylinder, a connecting gear ring connected to the middle of the inner wall of the external gear ring, and two sets of sliding rings connected to the upper part of the inner wall of the connecting cylinder, with sliders connected to the upper part of the inner wall of both the external gear ring and the inner gear ring, and grooves being provided on the outer walls of both sliding rings, wherein several sliders slide within the two grooves respectively.

[0011] Preferably, a drive gear is meshed with one side of the connecting gear ring, a rotating shaft is connected to the inner wall of the drive gear, the upper end of the rotating shaft is rotatably connected to the upper end of the inner wall of the connecting cylinder, an internal gear ring is meshed with the inner wall of the drive gear, a rotating plate is connected to the lower end of the inner wall of the internal gear ring, the rotating plate is located inside the rotating ring, and needles are evenly connected to the lower end of the rotating ring and the rotating plate, and the multiple needles have different diameters.

[0012] The technical effects and advantages of this utility model are as follows: The connecting motor and gear transmission in the needle punching mechanism drive the outer and inner toothed rings to rotate the rotating ring and rotating plate respectively. This not only allows for the processing of filter holes that are suitable for each layer of the filter by needles of different diameters, but also enables the differentiation of filter hole arrangement for each silicon carbide plate processed by adjusting the relative position of the rotating ring and rotating plate. This meets the design requirements of staggered distribution of filter holes between filter layers, and can adapt to diverse processing scenarios without changing the mold, reducing equipment investment costs and mold change time. 3. Through the coordinated design of the upper, middle, and lower silicon carbide plates in the silicon carbide ceramic filter, combined with the different pore sizes opened in each layer, the filter achieves graded interception of various inclusions from large to small in the molten aluminum. Compared with traditional single-layer filters, the impurity removal rate is improved. The outer peripheral adhesive sleeve not only firmly fixes the relative positions of the three silicon carbide plates to avoid interlayer separation caused by the impact of molten aluminum, but also blocks the leakage of molten aluminum from the interlayer gaps, ensuring that all molten aluminum is purified through the filter holes. At the same time, it enhances the overall structural strength of the filter, reduces the risk of damage during use, and extends the service life of the filter. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure of the needle-punching plastic hole processing device; Figure 2 This is a cross-sectional view of the needle-punching plastic hole processing device; Figure 3 This is a schematic diagram of the internal structure of the connecting cylinder; Figure 4 This is a schematic diagram of the connection structure between the external toothed ring and the connecting toothed ring. Figure 5 This is a schematic diagram of the three-dimensional structure of the ceramic filter body; Figure 6 This is a schematic diagram of the installation structure of the middle layer silicon carbide plate.

[0014] The attached figures are labeled as follows: 1. Ceramic filter body; 101. Upper silicon carbide plate; 102. Middle silicon carbide plate; 103. Lower silicon carbide plate; 104. Adhesive sleeve; 105. Filter hole; 2. Processing equipment; 201. Workbench; 202. Frame; 203. Drive motor; 204. Rotating rod; 205. Rotating plate; 206. Placement platform; 207. Support frame; 208. Cylinder; 209. Moving block; 210. Connecting cylinder; 211. Housing; 212. Connecting motor; 213. Connecting gear; 214. External gear ring; 215. Rotating ring; 216. Connecting gear ring; 217. Drive gear; 218. Rotating shaft; 219. Internal gear ring; 220. Rotating plate; 221. Needle body; 222. Slip ring; 223. Slider. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Refer to the instruction manual appendix Figures 5-6 As shown in the figure, a multi-layer stacked silicon carbide ceramic filter of this utility model includes a ceramic filter body 1. The ceramic filter body 1 includes an upper silicon carbide plate 101, a middle silicon carbide plate 102 connected to the lower end of the upper silicon carbide plate 101, and a lower silicon carbide plate 103 connected below the middle silicon carbide plate 102. An adhesive sleeve 104 is connected to the outer wall of the upper silicon carbide plate 101, the middle silicon carbide plate 102, and the lower silicon carbide plate 103. The adhesive sleeve 104 is sleeved on the outer wall of the upper silicon carbide plate 101, the middle silicon carbide plate 102, and the lower silicon carbide plate 103. Filter holes 105 are uniformly opened at the upper ends of the upper silicon carbide plate 101, the middle silicon carbide plate 102, and the lower silicon carbide plate 103. The pore size of the filter holes 105 is different. The ceramic filter body 1 contains and filters molten aluminum alloy, reducing inclusions and gas content in the molten aluminum to ensure the production quality of precision castings. The upper silicon carbide plate 101 performs preliminary filtration on the incoming molten aluminum, simultaneously achieving coarse and fine filtration. The middle silicon carbide plate 102 performs secondary purification on the molten aluminum that has not been fully filtered in the upper layer, improving the impurity interception efficiency. The lower silicon carbide plate 103 performs final fine filtration and degassing on the molten aluminum to ensure the cleanliness of the output molten aluminum. The adhesive sleeve 104 fixes the relative positions of the three silicon carbide plates to prevent the molten aluminum from impacting and causing separation between the layers, while also blocking the molten aluminum from leaking through the gaps between the layers. The filter holes 105 allow the molten aluminum to flow through, while intercepting inclusions of corresponding sizes through different hole diameters, adapting to the graded interception needs of various inclusions from large to small.

[0017] Refer to the instruction manual appendix Figures 1-4As shown, a needle-punching perforation processing device for a multi-layer stacked silicon carbide ceramic filter is also disclosed, including a processing device 2. The processing device 2 includes a worktable 201, a driving mechanism connected to the lower end of the worktable 201, and a rotating plate 205 connected to the upper end of the driving mechanism. The rotating plate 205 rotates above the worktable 201. Placement tables 206 are circumferentially connected to the upper end of the rotating plate 205. A pressing mechanism is connected to the middle of one side of the worktable 201, and a needle-punching mechanism is connected to the lower end of the pressing mechanism. The needle-punching mechanism is used to punch perforations in the upper silicon carbide plate 101 and the middle silicon carbide plate 102. Silicon plate 102 and lower silicon carbide plate 103 are perforated. The driving mechanism includes a frame 202. A drive motor 203 is connected to the lower end of the worktable 201. A rotating rod 204 is connected to the output end of the drive motor 203. The upper end of the rotating rod 204 extends through to the upper end of the worktable 201. The rotating rod 204 is connected to the middle of the lower end of the rotating plate 205. The pressing mechanism includes a support frame 207. One side of the support frame 207 is connected to the middle of one side of the worktable 201. A cylinder 208 is connected to one side of the support frame 207. A moving block 209 is connected to the lower end of the cylinder 208. Processing equipment 2 precisely punctures a single-layer silicon carbide plate blank to prepare the upper silicon carbide plate 101, middle silicon carbide plate 102, and lower silicon carbide plate 103 required for the filter. The driving mechanism provides power for the rotation of the rotating plate 205 to realize the intermittent feeding of the workpiece. The rotating plate 205 is mounted on the placement table 206, which drives the blank to be processed and the processed blank to switch positions. The placement table 206 places the single-layer silicon carbide plate blank to be processed to prevent the blank from shifting during processing. The pressing mechanism drives the needle punching mechanism to move up and down to realize the insertion and release action of the needle 221. The cylinder 208 outputs axial thrust to drive the moving block 209 and the needle punching mechanism to move up and down. The moving block 209 connects the cylinder 208 and the needle punching mechanism to transmit the driving force of the cylinder 208.

[0018] The needle-punching mechanism includes a connecting cylinder 210. A housing 211 is connected to the middle of one side of the connecting cylinder 210. A connecting motor 212 is connected to the upper side of the housing 211. The output end of the connecting motor 212 extends through into the housing 211. A connecting gear 213 is connected to the outer wall of the output end of the connecting motor 212. One end of the connecting gear 213 extends through into the connecting cylinder 210. The lower part of the connecting cylinder 210 is hollow. An opening is provided on one side of the connecting cylinder 210 corresponding to the connecting gear 213. An external gear ring 214 is meshed with one side of the connecting gear 213. A rotating ring 215 is connected to the lower end of the external gear ring 214. The rotating ring 215 is located below the connecting cylinder 210. A connecting gear ring 216 is connected to the middle of the inner wall of the external gear ring 214. Slip rings 222 are connected to the upper end of the inner wall of the connecting cylinder 210. There are two sets of slip rings 222. The upper part of the inner wall of the outer toothed ring 214 and the upper part of the inner wall of the inner toothed ring 219 are connected to sliders 223. The outer walls of the two slip rings 222 are provided with grooves. Several sliders 223 slide inside the two grooves respectively. A drive gear 217 is meshed with one side of the connecting toothed ring 216. A rotating shaft 218 is connected to the inner wall of the drive gear 217. The upper end of the rotating shaft 218 is rotatably connected to the upper end of the inner wall of the connecting cylinder 210. The inner wall of the drive gear 217 is meshed with the inner toothed ring 219. A rotating plate 220 is connected to the lower end of the inner wall of the inner toothed ring 219. The rotating plate 220 is located inside the rotating ring 215. Needles 221 are evenly connected to the lower ends of the rotating ring 215 and the rotating plate 220. The needles 221 have different diameters. The connecting cylinder 210 houses transmission components such as the external gear ring 214 and the internal gear ring 219, providing a closed space for gear meshing. The housing 211 is fixedly connected to the motor 212. The connecting gear 213 transmits the motor's power to the external gear ring 214, causing it to rotate. The external gear ring 214 drives the rotating ring 215 to rotate, and simultaneously transmits power to the drive gear 217 through the connecting gear ring 216. Needles 221 of different sizes are installed below the rotating ring 215, rotating synchronously with the external gear ring 214 to form holes. The connecting gear ring 216 meshes with the drive gear 217, transmitting the power of the external gear ring 214 to the internal gear ring 219. The sliding ring 222 cooperates with the slider 223 to restrict the axial movement of the external gear ring 214 and the internal gear ring 219. Displacement: The slider 223 slides within the groove of the slip ring 222, ensuring that the outer gear ring 214 and the inner gear ring 219 only rotate. The drive gear 217 changes the direction of power transmission, causing the inner gear ring 219 and the outer gear ring 214 to rotate in opposite directions. The rotating shaft 218 fixes the drive gear 217, ensuring that the drive gear 217 only rotates around its own axis. The inner gear ring 219 drives the rotating plate 220 to rotate, realizing the molding of needles 221 with different diameters. The rotating plate 220 is equipped with needles 221 of different diameters, which rotate synchronously with the inner gear ring 219. The needles 221 pierce into the silicon carbide plate blank, adapting to the processing requirements of filter holes 105 with different diameters in the upper silicon carbide plate 101, the middle silicon carbide plate 102, and the lower silicon carbide plate 103.

[0019] Working principle: Liquid aluminum alloy flows into the ceramic filter body 1 from the top. It first passes through the upper silicon carbide plate 101: large filter holes 105 ensure flow and intercept large-sized inclusions, while small filter holes 105 simultaneously capture tiny inclusions, achieving single-layer coarse filtration plus fine filtration. The liquid aluminum then permeates to the middle silicon carbide plate 102, which also has large and small filter holes 105, arranged in a staggered manner with the upper layer. The large holes in the middle layer capture medium-sized inclusions that were not intercepted in the upper layer, while the small holes intercept the tiny inclusions that have passed through. This extends the path of the liquid aluminum to improve the impurity removal rate. Finally, the liquid aluminum flows into the lower silicon carbide plate 103: the small holes perform final interception of trace tiny inclusions, and the silicon carbide pore walls adsorb tiny bubbles to reduce the gas content; the large holes continuously ensure flow, avoiding excessive filling resistance caused by multi-layer filtration, and finally outputting clean liquid aluminum.

[0020] The outer peripheral adhesive sleeve 104 is sintered from silicon carbide ceramic slurry and tightly wraps the outer periphery of the three-layer silicon carbide plate. On the one hand, it fixes the relative position between the layers to prevent the separation of the layers or the misalignment of the filter holes caused by the impact of the aluminum liquid; on the other hand, it blocks the aluminum liquid from seeping out from the gaps between the layers, ensuring that all the aluminum liquid passes through the synergistic filtration of the large and small holes of each layer, and the cleanliness of the final outflowing aluminum liquid meets the requirements of precision casting production and reduces surface defects of the casting. The operator places the semi-dry single-layer silicon carbide blank on the placement table 206 on the rotating plate 205. The drive motor 203 drives the rotating plate 205 to rotate horizontally through the rotating rod 204, and transports the placement table 206 containing the blank to the bottom of the needle punching mechanism. At the same time, the empty placement table 206 moves synchronously to the loading and unloading station, realizing parallel processing and loading and unloading, and improving production efficiency.

[0021] When the placement table 206 reaches the processing station, the cylinder 208 drives the moving block 209 and the needle-punching mechanism below to move down synchronously until the needle body 221 approaches the upper surface of the blank, completing the pre-processing positioning; the connecting motor 212 is pre-started, driving the outer gear ring 214 to rotate through the connecting gear 213, and the outer gear ring 214 drives the lower rotating ring 215 to rotate; at the same time, the connecting gear ring 216 on the inner wall of the outer gear ring 214 meshes with the driving gear 217, and the driving gear 217 then meshes with the inner gear ring 219, driving the rotating plate 2 20. The sliding engagement of the slip ring 222 and the slider 223 restricts the rotational stability of the external gear ring 214 and the internal gear ring 219, ensuring stable gear meshing and preventing filter hole depth deviation caused by the up-and-down movement of the needle body 221, thus ensuring the processing accuracy of the filter hole. During this process, the rotating ring 215 and the rotating plate 220 can be rotated and adjusted at any angle. By changing their relative positions, the distribution pattern of the large and small diameter needle bodies 221 at the lower end will be different. The connected motor 212 will stop running, so that the position of the needle body 221 remains unchanged.

[0022] The cylinder 208 continues to press down, driving the large and small diameter needles 221 to simultaneously pierce into the silicon carbide plate blank, forming preliminary filter holes. After a single hole-forming process is completed, the cylinder 208 drives the needle-piercing mechanism to reset, the needle 221 detaches from the blank, the drive mechanism starts again, and the rotating plate 205 transports the processed blank to the loading and unloading station. At the same time, a new blank to be processed is transported to the processing station. The positioning, pressing, hole-forming and resetting process is repeated until the processing of the three layers of silicon carbide plates required for the filter is completed. Subsequently, the single-layer plates are stacked in sequence and fixed by the adhesive sleeve 104 to form a complete filter.

[0023] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-layer stacked silicon carbide ceramic filter, comprising a ceramic filter body (1), characterized in that: The ceramic filter body (1) includes an upper silicon carbide plate (101), a middle silicon carbide plate (102) is connected to the lower end of the upper silicon carbide plate (101), and a lower silicon carbide plate (103) is connected below the middle silicon carbide plate (102). Filter holes (105) are uniformly opened at the upper ends of the upper silicon carbide plate (101), the middle silicon carbide plate (102) and the lower silicon carbide plate (103), and the filter holes (105) have different pore sizes.

2. The multi-layer stacked silicon carbide ceramic filter according to claim 1, characterized in that: An adhesive sleeve (104) is connected to the outer wall of the upper silicon carbide plate (101), the middle silicon carbide plate (102) and the lower silicon carbide plate (103). The adhesive sleeve (104) is sleeved on the outer wall of the upper silicon carbide plate (101), the middle silicon carbide plate (102) and the lower silicon carbide plate (103).

3. A needle-punching and perforation processing device for a multi-layer stacked silicon carbide ceramic filter, applied to the multi-layer stacked silicon carbide ceramic filter according to any one of claims 1-2, characterized in that: The equipment includes a processing device (2), which includes a worktable (201). The lower end of the worktable (201) is connected to a driving mechanism, and the upper end of the driving mechanism is connected to a rotating plate (205). The rotating plate (205) rotates above the worktable (201). The upper end of the rotating plate (205) is circumferentially connected to a placement platform (206). A pressing mechanism is connected to the middle of one side of the worktable (201), and the lower end of the pressing mechanism is connected to a needle punching mechanism. The needle punching mechanism is used to make holes in the upper silicon carbide plate (101), the middle silicon carbide plate (102), and the lower silicon carbide plate (103).

4. The needle-punching and perforation processing device for a multi-layer stacked silicon carbide ceramic filter according to claim 3, characterized in that: The driving mechanism includes a frame (202), a drive motor (203) is connected to the lower end of the worktable (201), a rotating rod (204) is connected to the output end of the drive motor (203), the upper end of the rotating rod (204) extends through to the upper end of the worktable (201), and the rotating rod (204) is connected to the middle of the lower end of the rotating plate (205).

5. The needle-punching and perforation processing device for a multi-layer stacked silicon carbide ceramic filter according to claim 3, characterized in that: The pressing mechanism includes a support frame (207), one side of which is connected to the middle of one side of the workbench (201), and a cylinder (208) is connected to one side of the support frame (207), and a moving block (209) is connected to the lower end of the cylinder (208).

6. The needle-punching and perforation processing device for a multi-layer stacked silicon carbide ceramic filter according to claim 3, characterized in that: The needle-piercing mechanism includes a connecting cylinder (210), a housing (211) is connected to the middle of one side of the connecting cylinder (210), a connecting motor (212) is connected to the upper side of the housing (211), the output end of the connecting motor (212) extends through into the interior of the housing (211), a connecting gear (213) is connected to the outer wall of the output end of the connecting motor (212), one end of the connecting gear (213) extends through into the connecting cylinder (210), the lower part of the connecting cylinder (210) is hollow, an opening is opened on one side of the connecting cylinder (210) corresponding to the connecting gear (213), and an outer... A toothed ring (214) is provided. A rotating ring (215) is connected to the lower end of the outer toothed ring (214). The rotating ring (215) is located below the connecting cylinder (210). A connecting toothed ring (216) is connected to the middle of the inner wall of the outer toothed ring (214). A sliding ring (222) is connected to the upper end of the inner wall of the connecting cylinder (210). There are two sets of sliding rings (222). A slider (223) is connected to the upper part of the inner wall of the outer toothed ring (214) and the upper part of the inner wall of the inner toothed ring (219). A sliding groove is provided on the outer wall of the two sliding rings (222). Several sliders (223) and several other sliders (223) slide inside the two sliding grooves respectively.

7. The needle-punching and perforation processing device for a multi-layer stacked silicon carbide ceramic filter according to claim 6, characterized in that, A drive gear (217) is meshed with one side of the connecting gear ring (216). A rotating shaft (218) is connected to the inner wall of the drive gear (217). The upper end of the rotating shaft (218) is rotatably connected to the upper end of the inner wall of the connecting cylinder (210). An internal gear ring (219) is meshed with the inner wall of the drive gear (217). A rotating plate (220) is connected to the lower end of the inner wall of the internal gear ring (219). The rotating plate (220) is located inside the rotating ring (215). Needles (221) are evenly connected to the lower ends of the rotating ring (215) and the rotating plate (220). Multiple needles (221) have different diameters.

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