Punch-formed ultrathin metal filtering material, process, filter and application
By using a stamping process to form staggered protrusions and irregularly shaped micropores on a metal substrate, the problems of high cost and easy damage of woven filter screens are solved, achieving efficient and stable filtration effect as well as high temperature resistance and corrosion resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-13
- Publication Date
- 2026-04-14
AI Technical Summary
Existing woven filter screens suffer from high processing costs, easy breakage of threads, low weaving efficiency, and easy deformation and damage under external force when the mesh count is high.
A first and second convex bulge, arranged in an array and staggered, are simultaneously formed on two surfaces of a metal substrate using a stamping process. The top of the bulge is provided with irregularly shaped micropores. The burrs are flattened by high-pressure gas to form an ultra-thin metal filter material.
It achieves efficient molding and stable micropore size, reduces costs, improves dirt holding capacity and filtration accuracy, avoids burr clogging, is suitable for high temperature and corrosion resistant environments, and is easy to clean and reuse multiple times.
Smart Images
Figure CN121846776A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of stamping technology, and in particular to a stamped ultrathin metal filter material, process, filter and application. Background Technology
[0002] Among filter materials, woven filter screens are a widely used basic filtration and separation element, made of interwoven metal wires (such as metal or copper wire) or non-metal wires (such as nylon or polyester). In solid-solid separation (screening and grading), such as in mining, building materials, and food processing industries, they are used to classify particulate materials according to particle size based on mesh size, such as screening stones, sand, flour, or powder metallurgy raw materials of different mesh sizes. In solid-liquid / gas separation (filtration), they are used to intercept solid particles in fluids, for example, filtering pharmaceutical solutions in chemical production, filtering fruit juice in the food and beverage industry, or as simple air filters. Combining them with other filter media can improve filtration accuracy. They can also serve as a "skeleton" or "backing" material, supporting more precise but less robust filter media (such as filter paper, filter membranes, and electrospun nanofiber layers) to prevent damage and extend their lifespan.
[0003] The core value of woven filter screens lies in their balance of performance, cost, and availability, but they also inevitably have inherent defects determined by their structural principles. For example, woven filter screens with higher mesh counts have drawbacks such as higher processing costs, susceptibility to breakage, and lower weaving efficiency. During use, woven filter screens may deform, break, or break under external forces.
[0004] Therefore, there is an urgent need to develop a stamped ultrathin metal filter material, process, filter and application. Summary of the Invention
[0005] The purpose of this invention is to disclose a stamped ultrathin metal filter material, process, filter and application.
[0006] The first objective of this invention is to develop a stamped ultrathin metal filter material.
[0007] The second objective of this invention is to develop a stamping process for ultra-thin metal filter materials.
[0008] The third objective of this invention is to develop a filter.
[0009] The fourth objective of this invention is to develop the use of a stamped ultrathin metal filter material.
[0010] To achieve the first objective mentioned above, the present invention provides a stamped ultrathin metal filter material, wherein the two surfaces of the metal substrate with a thickness of 0.005mm-0.03mm have a first reference horizontal plane and a second reference horizontal plane. The first reference horizontal plane is provided with a plurality of first convex hulls that protrude from the first reference horizontal plane and are arranged in a first array. The top of the first convex hulls is provided with a first irregular micro hole with a diameter of 20μm-60μm. The edges of the plurality of first irregular micro holes are all located on the first horizontal plane. The first horizontal plane is parallel to the first reference horizontal plane. The second reference horizontal plane is provided with a plurality of second protrusions protruding from the second reference horizontal plane and arranged in a second array. The top of the second protrusions is provided with a second irregular micropore with a diameter of 20μm-60μm. The edges of the plurality of second irregular micropores are all located on the second horizontal plane. The second horizontal plane is parallel to the second reference horizontal plane. The first convex hull and the second convex hull are arranged in a staggered manner.
[0011] Preferably, the height of the first convex bulge is 0.01mm-0.02mm, and the height of the second convex bulge is 0.01mm-0.02mm.
[0012] Preferably, the hole spacing between two adjacent first protrusions is 0.1mm-1.0mm, and the hole spacing between two adjacent second protrusions is 0.1mm-1.0mm.
[0013] Preferably, four adjacent first convex hulls form a rectangle, and the second convex hull is located at the center of the rectangle.
[0014] Preferably, the outer surfaces of both the first convex hull and the second convex hull are curved surfaces.
[0015] Based on the same inventive principle, and to achieve the second inventive objective mentioned above, this invention provides a stamping process for ultra-thin metal filter materials, comprising the following steps: Prepare a metal substrate with a thickness of 0.005mm-0.03mm; Prepare an upper module and a lower module. The bottom surface of the upper module is provided with an array of first holes and an array of first needles. The top surface of the lower module is provided with an array of second holes and an array of second needles. The upper module and the lower module are molded together to stamp the metal substrate. The second needles and the first holes cooperate to form a first convex bulge. A first irregular micro hole is formed on the top of the first convex bulge. The first needles and the second holes cooperate to form a second convex bulge. A second irregular micro hole is formed on the top of the second convex bulge. The first convex bulge and the second convex bulge are staggered to form a semi-finished filter material. The semi-finished filter material is placed on a first plate, and a second plate cooperates with the first plate to flatten the edges of the first irregular micropore and the second irregular micropore.
[0016] Preferably, a plurality of first air holes are provided on the first plate, the first air holes are aligned with the first irregular micro-hole, and the first air holes blow the burrs on the edge of the first irregular micro-hole outward. A plurality of second air holes are provided on the second plate, the second air holes are aligned with the second irregular micro-hole, and the second air holes blow the burrs on the edge of the second irregular micro-hole outward.
[0017] Preferably, the pore size of the first irregularly shaped micropore is 20μm-60μm, and the pore size of the second irregularly shaped micropore is 20μm-60μm; The height of the first convex hull is 0.01mm-0.02mm, and the height of the second convex hull is 0.01mm-0.02mm; The hole spacing between two adjacent first convex humps is 0.1mm-1.0mm, and the hole spacing between two adjacent second convex humps is 0.1mm-1.0mm.
[0018] Based on the same inventive principle, in order to achieve the third inventive objective mentioned above, the present invention provides a filter, which is a flat plate type or a cylindrical type, and the filter includes at least one layer of ultra-thin metal filter material formed by stamping as described in the first invention.
[0019] Based on the same inventive principle, in order to achieve the fourth inventive objective mentioned above, this invention provides an application: the application of the stamped ultrathin metal filter material described in the first invention in a high-temperature resistant pre-filter.
[0020] Compared with the prior art, the beneficial effects of the present invention are: (1) A first convex bulge and a second convex bulge arranged in an array and staggered are simultaneously stamped on two surfaces of a metal substrate with a thickness of 0.005mm-0.03mm. The top of the first convex bulge is provided with a first irregular micropore with a pore size of 20μm-60μm, and the top of the second convex bulge is provided with a second irregular micropore with a pore size of 20μm-60μm, thereby forming an ultra-thin metal filter material. The substrate of the filter material is a continuous metal sheet, which can be stainless steel foil, copper foil, aluminum foil, tin foil or alloy foil, etc. For example, stainless steel foil has a good foundation of high temperature resistance and corrosion resistance. The first irregular micropore and the second irregular micropore have stable dimensions and can be used for pre-filters in high temperature and corrosion resistant working conditions. At the same time, the first convex bulge and the second convex bulge of the filter material form an uneven surface structure, which can improve the dirt holding capacity of the filter material and help reduce the frequency of rinsing. For example, copper foil itself has a certain antibacterial effect and can be used for filtration in food and other fields.
[0021] (2) Ultra-thin metal filter materials are formed by stamping process, which has the advantages of high forming efficiency and stable micropore size. They have certain cost advantages and can replace traditional 200-500 mesh woven filter screens.
[0022] (3) The edge burrs of the first and second irregular micropores formed by stamping and piercing are flattened by the process of inflating and flattening, so that the edge burrs are flattened in the outward state, which effectively prevents the edge burrs from blocking the first and second irregular micropores again after being flattened; after the edge burrs are flattened, the edges of the first irregular micropores are all located on the first horizontal plane, and the edges of the second irregular micropores are all located on the second horizontal plane, so that the ultra-thin metal filter material has sufficient bonding surface when used in combination with other filter materials, and can also effectively avoid the edge burrs piercing other filter materials. Attached Figure Description
[0023] Figure 1 This is a three-dimensional structural diagram of the ultra-thin metal filter material formed by stamping according to the present invention.
[0024] Figure 2 This is a schematic diagram illustrating the stamping process and principle of the ultra-thin metal filter material of this invention.
[0025] Figure 3 This is a schematic diagram illustrating the flattening principle of the ultrathin metal filter material of this invention.
[0026] Figure 4 This is a three-dimensional structural diagram of the upper and lower modules of the present invention.
[0027] Figure 5 For the present invention Figure 4 A magnified structural diagram at point D.
[0028] Figure 6 This is a three-dimensional structural diagram of the upper and lower modules of the present invention.
[0029] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point E.
[0030] Figure 8 This is a flow chart of the forming process of the ultra-thin metal filter material formed by stamping according to the present invention.
[0031] Figure 9 This is a magnified photograph (500x magnification) of the ultra-thin metal filter material stamped according to the present invention.
[0032] Among them, 1. Metal substrate; 11. First reference horizontal plane; 12. Second reference horizontal plane; 13. First convex hull; 14. First irregular micropore; 141. Edge; 15. Second convex hull; 16. Second irregular micropore; 161. Edge; 2. Upper module; 21. First hole; 22. First needle; 3. Lower module; 31. Second hole; 32. Second needle; 4. Semi-finished filter material; 5. First flat plate; 51. First pore; 6. Second flat plate; 61. Second pore. Detailed Implementation
[0033] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent changes or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.
[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this 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. Therefore, they should not be construed as limiting this invention.
[0035] The specific implementation process of the present invention will be described below through several embodiments. Example 1
[0036] See Figures 1 to 7This embodiment discloses a stamped ultrathin metal filter material. A metal substrate 1 with a thickness of 0.005mm-0.03mm has two surfaces with a first reference horizontal plane 11 and a second reference horizontal plane 12. The first reference horizontal plane 11 is provided with a plurality of first protrusions 13 arranged in a first array, protruding from the first reference horizontal plane 11. The top of each first protrusion 13 is provided with a first irregularly shaped micropore 14 with a pore size of 20μm-60μm. The edges 141 of the plurality of first irregularly shaped micropores 14 are all located on the first horizontal plane L1, which is parallel to the first reference horizontal plane 11. The second reference horizontal plane 12 is provided with a plurality of protrusions 14 arranged in a first array. The second array consists of several second convex hulls 15, each with a second irregularly shaped micropore 16 at its top, having a diameter of 20μm-60μm. The edges 161 of the second irregularly shaped micropores 16 are all located on a second horizontal plane L2, which is parallel to the second reference horizontal plane 12. The first convex hull 13 and the second convex hull 15 are staggered. The diameters of the first irregularly shaped micropores 14 and the second irregularly shaped micropores 16 are both 20μm-60μm, such as 30μm, 40μm, and 50μm. It should be noted that the first irregularly shaped micropores 14 and the second irregularly shaped micropores 16 may be approximately circular, approximately square, or approximately rhomboid. The diameter refers to the diameter of the largest inscribed circle of the irregularly shaped micropore.
[0037] Specifically, see Figure 1 , Figure 2 and Figure 9The height of the first convex bulge 13 is 0.01mm-0.02mm, the height of the second convex bulge 15 is 0.01mm-0.02mm, the hole spacing A between two adjacent first convex bulges 13 is 0.1mm-1.0mm, and the hole spacing B between two adjacent second convex bulges 15 is 0.1mm-1.0mm; four adjacent first convex bulges 13 form a rectangle C, and the second convex bulge 15 is located at the center of the rectangle C, with one second convex bulge 15 at the center of each rectangle C; the first convex bulge 13 and the second convex bulge 15... All outer surfaces are curved. The first convex 13 and the second convex 15 on the surface of the ultrathin metal filter material are formed by stamping. The first convex 13 and the second convex 15 are simultaneously stamped on the two surfaces of the metal substrate 1 with a thickness of 0.005mm-0.03mm, arranged in an array and staggered. The top of the first convex 13 is provided with a first irregular micropore 14 with a pore size of 20μm-60μm, and the top of the second convex 15 is provided with a second irregular micropore 16 with a pore size of 20μm-60μm, thereby forming an ultrathin metal filter material. The substrate of this filter material is a continuous metal sheet. The metal sheet can be stainless steel foil, copper foil, aluminum foil, tin foil, or alloy foil, etc. For example, stainless steel foil has a good foundation of high temperature resistance and corrosion resistance. The first irregularly shaped micropores 14 and the second irregularly shaped micropores 16 have stable dimensions and can be used in pre-filters for high temperature and corrosion-resistant applications. At the same time, the first convex 13 and the second convex 15 of the filter material form an uneven surface structure, which can improve the dirt-holding capacity of the filter material and help reduce the frequency of rinsing. Copper foil, for example, has a certain antibacterial effect and can be used for filtration in food and other fields. The edges of the first irregularly shaped micropores 14 are evenly spaced... The edges of the second irregularly shaped micropores 16 are located on the second horizontal plane L2, which provides sufficient bonding surface when the ultra-thin metal filter material is used in combination with other filter materials, and can also effectively prevent edge burrs from piercing other filter materials. It adopts a metal substrate and is integrally stamped, without the knot weakness of woven filter mesh, and can withstand high pressure difference and mechanical impact. The use of a metal substrate makes it easy to clean. The surface structure of the filter material is regular, and the trapped particles are more easily removed by backwashing, ultrasonic cleaning, etc., which can be reused many times and reduce long-term costs. Example 2
[0038] See Figure 8 This embodiment provides a stamping process for forming ultra-thin metal filter materials, including the following steps: Step S1: Prepare a metal substrate with a thickness of 0.005mm-0.03mm; specifically, see Figure 2 (a) The two surfaces of the metal substrate 1 with a thickness of 0.005 mm to 0.03 mm have a first reference horizontal plane 11 and a second reference horizontal plane 12.
[0039] Step S2: See Figures 2 to 7 The upper module 2 and the lower module 3 are prepared. The bottom surface of the upper module 2 is provided with an array of first holes 21 and an array of first needles 22. The top surface of the lower module 3 is provided with an array of second holes 31 and an array of second needles 32. The upper module 2 and the lower module 3 are molded together to stamp the metal substrate 1. The second needles 32 and the first holes 21 cooperate to form a first protrusion 13. The top of the first protrusion 13 forms a first irregular micro-hole 14 that is pierced. The first needles 22 and the second holes 31 cooperate to form a second protrusion 15. The top of the second protrusion 15 forms a second irregular micro-hole 16 that is pierced. The first protrusion 13 and the second protrusion 15 are staggered to form a semi-finished filter material 4. Specifically, see the cross-sectional schematic diagram of the semi-finished filter material 4. Figure 2 (b) The edges 141 of some of the first irregular micropores 14 are in a burr state, and the edges 161 of some of the second irregular micropores 16 are in a burr state. The burrs will cause the surface of the semi-finished filter material 4 to be extremely uneven, and it is easy to puncture the filter material when it is combined with other filter materials, which will easily lead to the filtration accuracy of the composite filter material.
[0040] Step S3: See Figure 3 The semi-finished filter material 4 is placed on a first plate 5. A second plate 6 cooperates with the first plate 5 to flatten the edges of the first irregularly shaped micropores 14 and the second irregularly shaped micropores 16. Specifically, by flattening the first plate 5 and the second plate 6, the edges of the first irregularly shaped micropores 14 are all located on the first horizontal plane L1, and the edges of the second irregularly shaped micropores 16 are all located on the second horizontal plane L2. This provides sufficient bonding surface when the ultra-thin metal filter material is used in combination with other filter materials, and also effectively prevents edge burrs from piercing other filter materials. See the schematic diagram of the cross-section of the flattened filter material. Figure 2 (d).
[0041] In step S2, the edge burrs of the first irregularly shaped micro-hole 14 and the second irregularly shaped micro-hole 16 formed by punching and piercing are still in a relatively clustered state. If they are directly flattened, a considerable portion of the burrs will be pushed into the first irregularly shaped micro-hole 14 and the second irregularly shaped micro-hole 16, thereby blocking part of the first irregularly shaped micro-hole 14 and the second irregularly shaped micro-hole 16 and affecting the fluid permeability of the first irregularly shaped micro-hole 14 and the second irregularly shaped micro-hole 16. To solve this technical problem, see [link to relevant documentation]. Figure 3A plurality of first air holes 51 are provided on the first plate 5, and the first air holes 51 are aligned with the first irregular micro-holes 14. The first air holes 51 blow the burrs 141 on the edge of the first irregular micro-holes 14 outward through the high-pressure gas indicated by the arrow (the metal substrate 1 with a thickness of 0.005mm-0.03mm is as soft as paper, and the burrs can be blown outward under the action of airflow). A plurality of second air holes 61 are provided on the second plate 6, and the second air holes 61 are aligned with the second irregular micro-holes 16. The second air holes 61 blow the burrs 161 on the edge of the second irregular micro-holes 16 outward. While the first plate 5 and the second plate 6 are pressed flat together, the high-pressure airflow blown out by the first air holes 51 and the second air holes 61 ensures that the burrs are in an outward state. For details, please refer to [link to relevant documentation]. Figure 2 (c) The burrs in the outward-turned state will not block the first irregular micropore 14 and the second irregular micropore 16 after being flattened. It should be noted that while the burrs on the edge are flattened, the first convex 13 and the second convex 15 will also be compressed to a certain extent. After flattening, the height of the first convex 13 is 0.01mm-0.02mm, the height of the second convex 15 is 0.01mm-0.02mm, and the total thickness of the flattened ultra-thin metal filter material (including the thickness of the first convex 13 and the second convex 15) reaches 0.025mm-0.07mm.
[0042] See Figure 1 Through the above steps S1 to S3, we obtain Figure 9The ultrathin metal filter material shown has a first convex 13 and a second convex 15 formed by stamping. The first convex 13 and the second convex 15 are simultaneously stamped on two surfaces of a metal substrate 1 with a thickness of 0.005mm-0.03mm, arranged in an array and staggered. The top of the first convex 13 has a first irregularly shaped micropore 14 with a pore size of 20μm-60μm, and the top of the second convex 15 has a second irregularly shaped micropore 16 with a pore size of 20μm-60μm, thus forming an ultrathin metal filter material. The substrate of this filter material is a continuous metal sheet, providing good high-temperature resistance and corrosion resistance. The first irregularly shaped micropores 14 and the second irregularly shaped micropores 16 have stable dimensions, making it suitable for pre-filters operating in high-temperature and corrosion-resistant conditions. Furthermore, this filter material... The first convex 13 and the second convex 15 form an uneven surface structure, which can improve the dirt holding capacity of the filter material and help reduce the frequency of rinsing. The edges of the first irregular micropores 14 are all located on the first horizontal plane L1, and the edges of the second irregular micropores 16 are all located on the second horizontal plane L2. This provides sufficient bonding surface when the ultra-thin metal filter material is used in combination with other filter materials, and can also effectively prevent edge burrs from piercing other filter materials. The filter material is made of metal substrate and is integrally stamped, without the knot weakness of woven filter mesh, and can withstand high pressure difference and mechanical impact. The metal substrate makes it easy to clean. The surface structure of the filter material is regular, and the trapped particles are more easily removed by backwashing, ultrasonic cleaning, etc., which can be reused multiple times and reduce long-term costs.
[0043] The stamping process for preparing the ultrathin metal filter material disclosed in this embodiment is the same as that in Embodiment 1. Please refer to Embodiment 1 for the technical solutions that have the same parts, and they will not be repeated here. Example 3
[0044] This embodiment provides a filter, which is a flat plate or cylindrical type. The filter includes at least one layer of ultra-thin metal filter material formed by stamping as described in Embodiment 1. The metal filter material prepared in Embodiment 1 has the advantages of precision of irregular micropores, three-dimensional structure and intrinsic material properties, namely, high filtration accuracy, large dirt holding capacity of the three-dimensional structure formed by the convex bulge, and high temperature resistance and corrosion resistance of the material itself. The filter formed by combining it with other filter materials can have the above advantages. For example, coating any surface of the ultra-thin metal filter material with a PTFE membrane can form a high-precision composite filter material that is resistant to high temperature and corrosion.
[0045] The filter disclosed in this embodiment includes at least one layer of stamped ultrathin metal filter material as described in Embodiment 1. For the technical solutions with the same parts as in Embodiment 1, please refer to Embodiment 1, and it will not be repeated here. Example 4
[0046] This embodiment provides an application of the stamped ultrathin metal filter material described in Embodiment 1 in a high-temperature resistant pre-filter. For example, in a pre-filter for industrial high-temperature exhaust gas, at least one layer of the stamped ultrathin metal filter material as described in Embodiment 1 is included in the filter media.
[0047] The application of the ultrathin metal filter material disclosed in this embodiment has the same technical solution as that in Embodiments 1, 2 and 3. Please refer to Embodiments 1, 2 and 3 for details, which will not be repeated here.
Claims
1. A stamped ultrathin metal filter material, characterized in that, The two surfaces of the metal substrate with a thickness of 0.005mm-0.03mm have a first reference horizontal plane and a second reference horizontal plane; The first reference horizontal plane is provided with a plurality of first convex hulls that protrude from the first reference horizontal plane and are arranged in a first array. The top of the first convex hulls is provided with a first irregular micro hole with a diameter of 20μm-60μm. The edges of the plurality of first irregular micro holes are all located on the first horizontal plane. The first horizontal plane is parallel to the first reference horizontal plane. The second reference horizontal plane is provided with a plurality of second protrusions protruding from the second reference horizontal plane and arranged in a second array. The top of the second protrusions is provided with a second irregular micropore with a diameter of 20μm-60μm. The edges of the plurality of second irregular micropores are all located on the second horizontal plane. The second horizontal plane is parallel to the second reference horizontal plane. The first convex hull and the second convex hull are arranged in a staggered manner.
2. The ultra-thin metal filter material formed by stamping as described in claim 1, characterized in that, The height of the first convex hull is 0.01mm-0.02mm, and the height of the second convex hull is 0.01mm-0.02mm.
3. The ultra-thin metal filter material formed by stamping as described in claim 1, characterized in that, The hole spacing between two adjacent first convex humps is 0.1mm-1.0mm, and the hole spacing between two adjacent second convex humps is 0.1mm-1.0mm.
4. The ultra-thin metal filter material formed by stamping as described in claim 3, characterized in that, The four adjacent first convex hulls form a rectangle, and the second convex hull is located at the center of the rectangle.
5. The ultra-thin metal filter material formed by stamping as described in any one of claims 1-4, characterized in that, The outer surfaces of both the first and second convex hulls are curved surfaces.
6. A forming process for ultra-thin metal filter materials by stamping, characterized in that, Includes the following steps: Prepare a metal substrate with a thickness of 0.005mm-0.03mm; Prepare an upper module and a lower module. The bottom surface of the upper module is provided with an array of first holes and an array of first needles. The top surface of the lower module is provided with an array of second holes and an array of second needles. The upper module and the lower module are molded together to stamp the metal substrate. The second needles and the first holes cooperate to form a first convex bulge. A first irregular micro hole is formed on the top of the first convex bulge. The first needles and the second holes cooperate to form a second convex bulge. A second irregular micro hole is formed on the top of the second convex bulge. The first convex bulge and the second convex bulge are staggered to form a semi-finished filter material. The semi-finished filter material is placed on a first plate, and a second plate and the first plate cooperate to flatten the edges of the first irregular micropore and the second irregular micropore.
7. The forming process for ultra-thin metal filter material by stamping as described in claim 6, characterized in that, A plurality of first air holes are provided on the first plate, the first air holes are aligned with the first irregular micro-hole, and the first air holes blow the burrs on the edge of the first irregular micro-hole outward. A plurality of second air holes are provided on the second plate, the second air holes are aligned with the second irregular micro-hole, and the second air holes blow the burrs on the edge of the second irregular micro-hole outward.
8. The forming process for ultra-thin metal filter material by stamping as described in claim 7, characterized in that, The pore size of the first irregularly shaped micropore is 20μm-60μm, and the pore size of the second irregularly shaped micropore is 20μm-60μm; The height of the first convex hull is 0.01mm-0.02mm, and the height of the second convex hull is 0.01mm-0.02mm; The hole spacing between two adjacent first convex humps is 0.1mm-1.0mm, and the hole spacing between two adjacent second convex humps is 0.1mm-1.0mm.
9. A filter, characterized in that, The filter is flat or cylindrical, and the filter includes at least one layer of stamped ultrathin metal filter material as described in any one of claims 1-5.
10. The application of the stamped ultrathin metal filter material as described in any one of claims 1-5 in a high-temperature resistant pre-filter.