Aeration membrane micro-hole processing method and aeration membrane

Abstract

The application discloses an aeration membrane micro-hole processing method and an aeration membrane, and solves the problems of inconvenient micro-hole structure processing on the existing aeration membrane and poor waterproofness of the obtained aeration membrane. The processing machine comprises a punching mechanism and a clamp. When the aeration membrane is prepared, the aeration membrane is reversely buckled on the clamp, the position of the clamp is adjusted, the clamp is in an inclined position relative to the punching mechanism, the punching mechanism works, and the clamp moves with the aeration membrane, so that a plurality of micro-hole structures are processed on the processing area of the aeration membrane. The micro-hole structure on the obtained aeration membrane is composed of an elastomer and an aeration hole. Due to the relative position relationship between the punch needle and the clamp, after the aeration membrane is assembled on the aerator in a forward direction, the lateral dimension of the outer part of the elastomer is large, and the lateral dimension of the inner part of the elastomer is small. Therefore, when water in the outside pushes the elastomer, the elastomer can be tightly pressed on the aeration hole, so that water cannot enter the inside of the aerator to cause pollution and corrosion.

Description

TECHNICAL FIELD

[0001] The present application relates to a processing method, in particular to a method for processing micro-hole structure of an aeration membrane. The present application also relates to an aeration membrane processed by the processing method. BACKGROUND

[0002] The selection of the aeration equipment not only affects the biochemical treatment effect of the sewage, but also affects the land occupation, investment and operation cost of the sewage field. The micro-hole aerators mainly include the suspended chain type aeration equipment, the membrane type micro-hole aeration equipment, the rotary cutting type aeration equipment, the pipe type aeration equipment, the disc type aeration equipment, the micro-hole ceramic aeration equipment and the hose type aeration equipment. The gas passes through the micro-holes on the aeration equipment and enters the sewage in the form of bubbles. After the bubbles are mixed with the sewage, the sewage is purified. The aeration equipment is applied in the river treatment. The gas is sent into the river through the aeration equipment, so as to increase the oxygen capacity in the water and help the survival of the fish and other organisms, thereby effectively cleaning the water by the fish. The aeration membrane is generally made of soft rubber or silicone and other high polymer materials. Some micro-holes are processed on the aeration membrane to form the aeration membrane. The gas enters the water in the form of bubbles from the micro-holes. The micro-holes on the existing aeration membrane are generally processed by a poking tool. The structure of the poking tool includes a plate body and a plurality of poking needles arranged on the plate body. When the micro-holes are processed, the aeration membrane is poked by the poking tool at one time, so as to process a plurality of micro-holes on the aeration membrane. The poking tool is inconvenient to prepare and cannot well ensure the uniformity of the size of the processed micro-holes, thereby affecting the uniformity of the gas outlet of the aeration equipment.

[0003] Chinese patent document (publication number: CN 101037266 A) discloses a manufacturing method of a polymer micro-hole aeration equipment. The aeration equipment with micro-hole structure is manufactured by raw material oscillation, high pressure setting and high temperature sintering. The specific steps are as follows: the polymer raw material is placed in a mold and oscillated for 10-25 minutes. The raw material after oscillation is extruded and set. The setting pressure is 8-20 MPA, and the setting time is 2-12 minutes. The thickness of the aeration equipment is controlled to be 10-30 MM, preferably 12-15 MM. The high temperature sintering is performed at a sintering temperature of 120-210℃ for 100-200 minutes. The temperature gradient between the inner surface and the outer surface of the setting product is controlled to be 15-25℃ during sintering. The product is obtained after cooling. The polymer aeration equipment obtained by the method has low energy consumption, high mechanical strength, small and uniform bubble distribution, good oxygenation effect, corrosion resistance, long service life and no easy blockage. The manufacturing process is simple and easy to master. The material is easy to obtain, and has good popularization and application value.

[0004] This method of preparing microporous aerators involves creating numerous micropores on an aeration membrane through raw material vibration, high-pressure shaping, and high-temperature sintering. However, the effective micropore size produced in this method is not uniform, resulting in inconsistent bubble densities throughout the aerator during practical applications. This affects the water treatment effect. Furthermore, this microporous aerator does not consider the issue of liquid permeation within the micropores. When not in use, a small amount of liquid may seep into the aerator's interior, potentially causing contamination and corrosion. Summary of the Invention

[0005] To overcome the above-mentioned defects, the technical problem to be solved by the present invention is to provide a method for processing micropores in aeration membranes, so as to process qualified micropore structures on aeration membranes.

[0006] The present invention also provides an aeration membrane sheet produced by the aforementioned processing method, which, when applied to an aerator, makes it less likely for external liquid to enter the interior of the aerator.

[0007] To solve the aforementioned technical problem, the present invention provides a method for processing micropores in an aeration membrane. This method utilizes a processing machine to process a micropore structure in the processing area of ​​the aeration membrane. The processing machine includes a clamp and a punching mechanism. The punching mechanism includes a needle rod vertically mounted on a frame and a punching needle coaxially fixed to the lower end of the needle rod. The clamp includes a support base and a clamping clamp for connecting to the support base. The method is characterized by the following steps:

[0008] Fix the aeration membrane, and then attach the aeration membrane to the support base in reverse. Connect the annular clamp to the support base so that the clamp presses against the outer edge of the aeration membrane. The back of the processing area on the aeration membrane is exposed, and the front of the processing area faces the support surface of the support base.

[0009] Adjust the position of the support base to a suitable spatial position so that the back of the processing area is tilted relative to the punch pin, and there is an angle between the punch pin and the normal of the processing point on the processing area;

[0010] Start the power mechanism, which drives the support base to move relative to the aeration membrane.

[0011] Start the working motor, which drives the puncturing needle to move vertically through the needle rod and puncture the aeration membrane, thus leaving a microporous structure in the processing area of ​​the aeration membrane.

[0012] The micro-hole structure obtained by the processing is not a through-hole structure, but a slit-like structure in appearance, which can be C-shaped or cross-shaped. In the processing method, the steps are generally operated in the order of the steps described above, but the order of the subsequent steps can be adjusted. Except for the step of fixing the aeration film, which is manually operated, the remaining steps are generally automated, which can be achieved by a PLC controller combined with various position sensors. The normal line concept should be generally understood, that is, if the processing area is a plane, the normal line is perpendicular to the plane; if the processing area is a curved surface, the normal line is perpendicular to the tangent plane of the processing point. The back surface of the processing area is inclined relative to the spike, mainly referring to the back surface of the processing area being inclined relative to the spike during the processing of each micro-hole structure, which is achieved by the spatial position of the support seat. Therefore, even if the processing area is a curved surface, the curved surface is a relatively regular curved surface, such as a spherical cap or a circular arc surface, and the curvature radius is the same everywhere.

[0013] The front surface of the processing area refers to the surface of the aeration film facing outward after being assembled on the aerator, and the surface facing the support structure on the aerator is the back surface. During processing, the aeration film is buckled on the support seat, so that the front surface of the processing area faces the support surface of the support seat, and the spike pierces the aeration film from the back surface of the processing area.

[0014] Further, for processing the spherical cap-shaped aeration film, the power mechanism and the support seat are arranged on the movable base, and the base is in transmission connection with the driving mechanism; in the step of "starting the power mechanism", the power mechanism rotates the support seat in the circumferential direction; and the micro-hole structure formed on the processing area is arranged in multiple circles. This method can well adapt to the processing of the spherical cap-shaped aeration film, and the aeration film is driven to rotate by the support seat, thereby facilitating the processing of qualified micro-hole structures.

[0015] Further, after one circle of micro-hole structures is processed, the base is angularly deflected by the driving mechanism to process another circle of micro-hole structures. In this way, the processing of the micro-hole structures in the entire processing area can be conveniently realized, and the distribution of the processed micro-hole structures is relatively uniform.

[0016] Further, the cylindrical base is fixed on the U-shaped base, a pivot cooperation structure is arranged between the support seat and the base, and the driving mechanism is in transmission connection with the support seat through the transmission structure. This base can facilitate the connection of the support seat, and also facilitate the overall deflection of the base to change the position of the support seat.

[0017] Further, the angle is between 5-30 degrees. The angle is formed to make the lateral size of the micro-hole structure outside larger than inside, so that the liquid outside is not easy to enter the inside of the aerator through the micro-hole structure without affecting the air outlet.

[0018] Further, the step of adjusting the horizontal position of the frame is further included to adjust the horizontal position of the frame. The horizontal position of the frame is adjusted to adjust the horizontal position of the needle relative to the support seat, so as to further ensure the accuracy of the relative position between the needle and the aeration membrane, and facilitate the processing of the micro-hole structure on the aeration membrane.

[0019] Further, the step of adjusting the height position of the frame is further included to adjust the height position of the frame. The height of the frame is adjusted to make the needle well adapt to the processing position requirement of the aeration membrane with different diameters.

[0020] Further, the step of passing high-pressure gas is further included. A plurality of gas outlets are arranged on the supporting surface of the support seat, and a high-pressure gas pipe is connected to the support seat. After the step of fixing the aeration membrane, high-pressure gas is passed into the support seat through the high-pressure gas pipe, and the high-pressure gas enters the aeration membrane from the gas outlets, so that the aeration membrane is separated from the supporting surface. This makes the aeration membrane have a gap with the supporting surface by passing the high-pressure gas, so as to facilitate the piercing of the aeration membrane, and the space between the needle and the support seat is left, so that the needle is not easy to touch the support seat, thereby protecting the needle and the support seat.

[0021] According to the processing method, the cross section of the working end of the needle is C-shaped, the micro-hole structure formed by the processing is composed of an aeration hole and an elastic body, the aeration hole is C-shaped, the outer side of the elastic body is C-shaped, and the lateral size of the outer side of the elastic body is larger than that of the inner side. The needle pierces the aeration membrane from the back of the processing area, and the needle is inclined relative to the back of the processing area, so that the lateral size of the inner side and the outer side of the elastic body is different. The inner side and the outer side refer to the front of the processing area as the outer side and the back of the processing area as the inner side when the aeration membrane is assembled on the aerator. The fitting surface between the elastic body and the aeration hole is inclined, so that the lateral size of the elastic body is different between the inner side and the outer side. The structure of the elastic body does not affect the entry of the high-pressure gas from the back into the water body, and the high-pressure gas can push the elastic body, but when the water pressure is on the elastic body, the side of the elastic body is tightly pressed on the inner side of the aeration hole, so that the water outside is not easy to enter the inside of the aerator, so as to avoid the pollution of the inside of the aerator.

[0022] The beneficial effects of the present application are that, in the preparation method, the structure of the punch needle combined with the support seat is used, and the support seat can move according to the needs, so that the punch needle can be used to process the micro-hole structure on the processing area of the aeration membrane. During the micro-hole structure processing on the aeration membrane, automatic processing can be carried out according to the set program, the degree of automation is high, and the demand for processing the micro-hole structure on the aeration membrane can be well met. Since the aeration membrane can stably move with the support seat, the relative position between the aeration membrane and the punch needle can be kept consistent during the processing of the aeration membrane, so that the accurate micro-hole structure can be processed on the aeration membrane.

[0023] The aeration membrane is reversely sleeved on the support seat, and the back surface of the processing area of the aeration membrane is arranged to be inclined relative to the punch needle, so that the lateral dimension of the outer part of the elastomer formed on the processing area is large, and the lateral dimension of the inner part is small, so that the elastomer does not affect the high-pressure gas entering the water body through the micro-hole structure, but when the external liquid pushes the elastomer, the outer side of the elastomer can be tightly attached to the inner side of the aeration hole, and the liquid is not easy to enter the inside of the aerator. When the aerator is not used, the liquid will not pollute and corrode the inside of the aerator. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the structure diagram of the aeration membrane micro-hole structure processing machine.

[0025] Figure 2 is the assembly structure diagram of the aerator involved.

[0026] Figure 3 is the structure diagram of the working end of the punch needle.

[0027] Figure 4 is Figure 3 is the cross-sectional enlarged view of

[0028] Figure 5 is the partial enlarged view of the front surface of the aeration membrane.

[0029] Figure 6 is the partial cross-sectional enlarged view of the aeration membrane.

[0030] In the figure, 1 is a driving motor, 2 is a rotating shaft, 3 is a connecting seat, 4 is a pressing clamp, 5 is a support seat, 6 is a punch needle, 7 is a pull rod, 8 is a needle rod, 9 is a rack, 10 is a working motor, 11 is an eccentric block, 12 is a power motor, 13 is a high-pressure gas pipe, 14 is a base, 15 is a base, 16 is a gas guide pipe, 17 is a gas guide seat, 18 is a connecting body, 181 is a support part, 182 is a through hole, 183 is a connecting part, 19 is an aeration membrane, 191 is an elastomer, 192 is an aeration hole, 20 is a ring clamp, 21 is a horizontal frame, and 22 is a vertical frame. DETAILED DESCRIPTION

[0031] As shown in the drawings, the method for processing the micro-holes of the aeration membrane 19 is to use a processing machine to process the micro-hole structure of the aeration membrane 19, so that when the aerator is in use, the gas passes through the micro-hole structure in the form of bubbles into the water body. The main body of the aeration membrane 19 is in the shape of a spherical cap, the top end of the aeration membrane 19 is a blind area for processing, and the rest is a processing area that needs to be processed with a full micro-hole structure. The main structure of the processing machine includes a clamp for clamping and fixing the aeration membrane 19 and a punching mechanism for punching the processing area of the aeration membrane 19 to form a plurality of micro-hole structures. In the case that the clamp is movable, the clamp moves the aeration membrane 19 relative to the punching mechanism, and the punching mechanism can process a full micro-hole structure on the processing area of the aeration membrane 19.

[0032] The punching mechanism is arranged on the rack-type machine frame 9, specifically, a needle rod 8 is vertically and movably arranged on the machine frame 9, and a punching needle 6 is fixed on the lower end of the needle rod 8. A working motor 10 is horizontally arranged on the machine frame 9, and the rotating speed of the working motor 10 is about 700 rpm. An eccentric block 11 is fixed on the power output shaft of the working motor 10, and the two ends of the pull rod 7 are movably connected with the eccentric block 11 and the needle rod 8, respectively. Under the driving of the working motor 10, the punching needle 6 reciprocates in the vertical direction, thereby punching the aeration membrane 19 to form a micro-hole structure. Figure 3 、 4 As shown in the drawings, the cross section of the working end of the punching needle 6 is in the shape of C, and the processing through the punching needle 6 will process a micro-hole structure in the shape of C on the aeration membrane 19. The transverse size of the obtained micro-hole structure is about 1-3 mm, and 6000-7000 micro-hole structures can be processed on a spherical cap-shaped aeration membrane.

[0033] In order to adapt the punching mechanism to the processing needs of aeration membranes 19 of different sizes, the machine frame 9 is connected to the horizontal frame 21 which is arranged in the horizontal direction. A horizontal moving mechanism is arranged on the horizontal frame 21, which can be a transmission chain, a transmission belt, usually a screw rod mechanism, and the screw rod in the screw rod mechanism is arranged horizontally along the length direction of the horizontal frame 21. The machine frame is screw-connected to the screw rod, and the screw rod is driven to rotate by a horizontal moving motor, so that the machine frame moves axially on the screw rod, thereby changing the horizontal position of the punching mechanism relative to the clamp.

[0034] The horizontal frame 21 is connected to the vertical frame 22, the vertical frame 22 is arranged in the vertical direction, and a vertical moving mechanism is arranged on the vertical frame 22. The vertical moving mechanism can be a transmission belt or a transmission chain, and is usually a lead screw mechanism. A screw rod in the lead screw mechanism is arranged in the vertical direction. A coupling structure is arranged on the horizontal frame 21, and the coupling structure is threadedly connected with the screw rod in the lead screw mechanism. A vertical moving motor is arranged at the upper end of the vertical frame 22. The vertical moving motor drives the screw rod to rotate, so that the horizontal frame 21 is raised and lowered on the vertical frame 22 to change the height of the whole punching mechanism.

[0035] It should be noted that when the micro-hole structure is processed, the position of the punching mechanism is fixed after being determined. The aeration membrane is driven to rotate by the clamp, and after the processing of a circle of micro-hole structure is completed, the position of the punching mechanism needs to be adjusted according to the situation.

[0036] The clamp structure includes a support seat 5, the support seat 5 has a support surface, the aeration membrane 19 is reversely buckled on the support seat 5, the back surface of the processing area of the aeration membrane 19 faces outward, and the back surface faces the support surface. Figure 1 、 2 As shown in FIG. 2, the support surface and the main body part of the aeration membrane 19 are both spherical caps. The support seat 5 is rotatably arranged on the base 14. The support seat 5 has a pivot structure for rotating with the base 14. A power mechanism is in transmission connection with the support seat 5. Under the driving of the power mechanism, the support seat 5 rotates on the base 14, so that the processing area on the aeration membrane 19 sequentially receives the punching work of the punch pin 6.

[0037] The pivot structure is inserted and matched on the cylindrical base 15, the base 15 is fixedly connected to the base 14, the power mechanism is a power motor 12 arranged on the base 15, and the power motor 12 is in transmission connection with the pivot structure through a transmission structure. The transmission structure can be a matching bevel gear or a worm gear mechanism. When the power motor 12 works, the support seat 5 rotates on the base 15 through the transmission structure. The aeration membrane 19 is integrally formed with a circular ring-shaped connecting ring at the outer edge, and a circular ring-shaped pressing clamp 4 is arranged on the support seat 5. The pressing clamp 4 presses the connecting ring on the aeration membrane 19 on the support seat 5.

[0038] The base 14 is movably arranged, and the base 14 is in transmission connection with a driving mechanism. Under the driving of the driving mechanism, the base 14 is in a movable state. Figure 1The base 14 is in the shape of a trapezoid, and both ends of the base 14 are provided with protruding rotating shafts 2, one rotating shaft 2 is rotatably inserted into one coupling seat 3, the driving mechanism is a driving motor 1, the driving motor 1 is connected to one coupling seat 3, and the power output shaft of the driving motor 1 is in transmission connection with one rotating shaft 2. When working, the driving motor 1 drives the base 14 to deflect by an angle, so that the supporting seat 5 drives the aeration membrane 19 to be in an inclined state, and then the power motor 12 adopts a stepping motion mode, so that the aeration membrane 19 is driven by the supporting seat 5 to stepwise deflect, the stepwise deflection angle of the aeration membrane 19 is adapted to the vertical motion of the thorn needle 6, the aeration membrane 19 is punctured by the thorn needle 6 once for each deflection angle, so that a micro-porous structure with appropriate spacing can be processed on the aeration membrane 19. When one circle of micro-porous structure is processed, the driving motor 1 drives the base to deflect by an angle again, and adjusts the position of the rack 9 on the cross beam 22, and the aeration membrane 19 is driven by the supporting seat 5 to rotate, so that another circle of micro-porous structure is formed on the aeration membrane 19. According to the adjustment of the position, the micro-porous structure processing in the processing area of the aeration membrane 19 is completed.

[0039] The processing machine can be automatically controlled through a PLC controller, the driving motor 1, the power motor 12, the transverse moving motor and the vertical moving motor are all servo motors, and some sensors are arranged, so that the thorn needle 6 and the aeration membrane 19 are in appropriate relative positions, so as to process the micro-porous structure on the aeration membrane 19.

[0040] In order to protect the supporting seat 5 and the thorn needle 6, a high-pressure air pipe 13 is arranged on the base 15, high-pressure air is conveyed in the high-pressure air pipe 13, the high-pressure air pipe 13 is connected to the back side of the supporting seat 5, a plurality of air outlets are arranged on the supporting surface of the supporting seat 5, and the high-pressure air pipe 13 is in communication with the air outlets. The high-pressure air passes through the air outlets and acts on the aeration membrane 19, so that the aeration membrane 19 is blown away from the supporting surface of the supporting seat 5, a gap is formed between the aeration membrane 19 and the supporting seat 5, and the aeration membrane 19 can be punctured to form micro-holes without the thorn needle 6 contacting the supporting surface.

[0041] See Figure 2The aerator structure includes a connecting body 18, the upper part of which is a spherical support 181, and the lower part is a connecting part 183 with external threads. Several through-holes 182 are provided on the bottom side of the support 181. An aeration membrane 19 is sleeved on the support 181, and a ring clamp 20 is threaded onto the connecting part 183, pressing the aeration membrane 19 onto the support 181. An air guide seat 17 is threaded onto the connecting part 183 from the bottom, and an air guide pipe 16 is provided at the center of the air guide seat 17. Water treatment gas enters the connecting body 183 through the air guide pipe 16 and enters the space between the support 181 and the aeration membrane 19 through the through-holes 182. Finally, it enters the water in the form of bubbles through the microporous structure on the aeration membrane 19, thus achieving water treatment.

[0042] When processing the aeration membrane 19 using the aforementioned processing machinery, the aeration membrane 19 is first snapped onto the support base 5 in a reverse orientation, so that the back of the aeration membrane 19 is exposed and the front of the aeration membrane 19 faces the support surface of the support base 5. A clamp 4 is connected to the support base 5, pressing the outer edge of the aeration membrane 19 into place, thereby fixing the aeration membrane 19. The drive motor 1 is then started, causing the base 14 to rotate at an angle, resulting in the support base 5 being in an inclined state, with the back of the aeration membrane 19 inclined relative to the punching needle 6. An angle exists between the punching needle 6 and the normal to the processing point on the aeration membrane 19, and this angle is between 5 and 30 degrees. Start the working motor 10 and the power motor 12 to make the support base 5 rotate on the base 15, and the punching needle 6 moves up and down. After the punching needle 6 has processed a ring of micropores on the spherical aeration membrane 19, start the drive motor 1 again to make the base 15 deflect by an angle again, and adjust the horizontal position and height of the frame 9 as needed to process another ring of micropores on the processing area of ​​the aeration membrane 19.

[0043] Combination Figure 5 , 6 The aeration membrane 19 obtained by this processing method will have a number of microporous structures evenly distributed in the processing area. The microporous structure is composed of an elastomer 191 and aeration holes 192. The elastomer 191 has a C-shaped outer surface and the aeration holes 192 have a C-shaped inner surface. Since there is an angle between the punch 6 and the normal of the processing point on the aeration membrane 19, the lateral dimension of the outer part of the elastomer 191 is larger than the lateral dimension of the inner part of the elastomer 191. The larger the angle, the greater the difference in lateral dimensions between the inner and outer parts of the elastomer 191.

Claims

1. An aeration membrane micro-hole processing method, which processes a micro-hole structure on a processing area of an aeration membrane using a processing machine, the processing machine including a clamp and a piercing mechanism, the piercing mechanism including a needle bar disposed in a vertical direction on a machine frame and a piercing needle coaxially fixed at a lower end of the needle bar, and the clamp including a support base and a pressing clamp for being connected to the support base, characterized in that, The method comprises the following steps: fixing the aeration membrane, reversely sleeving the aeration membrane on the support base, connecting the annular pressing ring to the support base, and pressing the aeration membrane at the outer edge of the pressing ring, the back of the processing area being exposed, and the front of the processing area facing the support surface of the support base; adjusting the position of the support base, and adjusting the support base to a suitable spatial position, so that the back of the processing area is in an inclined state relative to the needle, and the needle and the normal line of the processing point on the processing area have an included angle; starting the power mechanism, and moving the support base with the aeration membrane relative to the needle under the driving of the power mechanism; starting the working motor, and moving the needle in the vertical direction through the needle rod under the driving of the working motor, and puncturing the aeration membrane, so as to leave a micropore structure in the processing area of the aeration membrane.

2. The method of claim 1, wherein, The method for processing the spherical cap-shaped aeration membrane comprises the following steps:

3. The method of claim 2, wherein the membrane is a gas exchange membrane. the power mechanism is used to rotate the support base in the circumferential direction in the step of starting the power mechanism; and the micropore structure formed on the processing area is arranged in multiple circles.

4. The method of claim 2, wherein the membrane is a gas exchange membrane. After one circle of micropore structure is processed, the base is angularly deflected through the driving mechanism, so as to process another circle of micropore structure.

5. The method of claim 1, wherein the membrane is a gas exchange membrane. The cylindrical base is fixed on the concave base, the pivot cooperation structure is arranged between the support base and the base, and the driving mechanism is transmissionally connected with the support base through the transmission structure.

6. The method of aeration membrane micropore processing according to claim 1, 2, 3, 4 or 5, characterized by, In the step of adjusting the position of the support base, the included angle is between 5-30 degrees.

7. The method of claim 6, wherein the membrane is a gas exchange membrane. The method further comprises the steps of adjusting the horizontal position of the rack, and adjusting the horizontal position of the rack.

8. The method of aeration membrane micropore processing according to claim 1, 2, 3, 4 or 5, characterized by, The method further comprises the steps of adjusting the height position of the rack, and adjusting the height position of the rack.

9. An aerated membrane sheet processed by the method of processing of claim 1, 2, 3, 4 or 5, wherein, The method further comprises the step of passing high-pressure gas, the support surface of the support base is provided with a plurality of gas outlets, the high-pressure gas pipe is connected to the support base, and high-pressure gas is passed into the support base through the high-pressure gas pipe after the step of fixing the aeration membrane, so that the high-pressure gas enters the aeration membrane from the gas outlets, and the aeration membrane is separated from the support surface. The cross section of the working end of the needle is C-shaped, the micropore structure formed by processing is composed of an aeration hole and an elastic body, the aeration hole is C-shaped, the outer side of the elastic body is C-shaped, and the transverse dimension of the outer side of the elastic body is larger than that of the inner side.

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