Film coating device for filter film production based on electrostatic film coating method

Abstract

The invention discloses a film coating device for filter film production based on an electrostatic film coating method, relates to the technical field of filter films, and provides the following scheme aiming at the problems that a base material provided by the background technology is easy to form secondary pollution, the base material cannot be subjected to real-time dust removal treatment, slurry cannot be stably attached to the base material, and the film coating effect is poor. Comprising a base and a base material, the mounting mechanism comprises two mounting seats which are respectively connected to the outer wall of the top of the base through bolts, and two ultrasonic dust removers which are respectively connected to the outer walls of the opposite sides of the two mounting seats through bolts; the two atomization depositor and the two terahertz pulse irradiator are respectively connected to the outer walls of the opposite sides of the two mounting seats through bolts. According to the device, dust attached to a base material can be cleaned in real time, secondary pollution of the base material in the conveying process is prevented, the situation that slurry cannot be stably attached to the base material is avoided, and the film coating effect is improved.

Description

Technical Field

[0001] This invention relates to the field of filter membrane technology, and more particularly to a coating apparatus for filter membrane production based on electrostatic coating method. Background Technology

[0002] Membrane filtration is a solid-liquid separation technology. It filters water through membrane pores, retaining impurities without causing chemical changes, making it a simple treatment process. Filtration membranes are classified according to the size of the raw water particles they trap. From coarse to fine, membrane pores are classified as microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO). MF membranes have pore sizes of 0.05µm or larger, or molecular weights of 1000 or larger, and are used to remove colloids and high-molecular-weight organic matter. NF membranes have pore sizes of 100–1000 molecular weights, removing substances between those removed by UF and RO, primarily targeting trihalomethanes, odors, and color. RO membranes can separate particles with molecular weights in the tens of molecular weights, such as pesticides, soluble organic matter, Ca, and Mg. They are used to remove salts and inorganic salts. The pressure of the water permeating RO membrane is 1 to 2 times higher than its osmotic pressure. In addition to the above four types, there are ion exchange membranes and gas permeation membranes. MF, UF, NF, and RO use pressure to drive solid-liquid separation, while ion exchange membranes use electricity to drive the separation of salt molecules, thus promoting seawater desalination. Gas permeation membranes are a new type of membrane that allows gas to pass through, enabling ethanol concentration and seawater desalination. The materials used to make membranes are generally of three types: fiber, synthetic resin, and ceramic.

[0003] Electrostatic coating is a coating process achieved through the following steps: atomizing the coating material (liquid, powder, or nano suspension) into micron / nano-scale particles, and charging them (usually negatively charged, voltage range 5-100kV) through corona discharge, triboelectric charging, or field ionization. A non-uniform electrostatic field (field strength 0.5-10kV / cm) is established between the atomizing device and the substrate, forming a directional migration channel for the charged particles. Under the action of Coulomb force, the charged particles move along the electric field lines and collide with the substrate surface to form a dense coating through charge neutralization, van der Waals forces, or chemical bonding.

[0004] Based on existing technology, in the production process of filter membranes, electrostatic coating is required to apply slurry to the substrate. However, in the existing coating equipment, the dust on the substrate needs to be cleaned in advance before the substrate is transported into the coating equipment. During the transportation process, the substrate is prone to secondary pollution. It is impossible to remove dust from the substrate in real time, which makes it impossible for the slurry to adhere firmly to the substrate and the coating effect is poor. Summary of the Invention

[0005] This invention provides a coating device for producing filter membranes based on electrostatic coating, which solves the problems in the prior art where the substrate is easily contaminated during coating, the substrate cannot be cleaned in real time, and the slurry cannot adhere firmly to the substrate, resulting in poor coating effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A coating apparatus for producing filter membranes based on electrostatic coating includes a base and a substrate. The base has a mounting mechanism on its top, comprising two mounting seats bolted to the outer wall of the base top, two ultrasonic dust collectors bolted to the outer walls of opposite sides of the two mounting seats, two atomizing depositors bolted to the outer walls of opposite sides of the two mounting seats, and two terahertz pulse irradiators bolted to the outer walls of opposite sides of the two mounting seats. A conveying assembly is provided between the two mounting seats, comprising a conveying motor and a conveyor belt with both ends penetrating through and connected to the outer walls of the two mounting seats via bearings. The conveying roller has an extrusion assembly above it. The extrusion assembly includes a mounting plate bolted to the top outer wall of the two mounting seats, an extrusion cylinder bolted to the top outer wall of the mounting plate, and an extrusion roller. Each of the two mounting seats has a dust removal assembly on one side outer wall. The dust removal assembly includes a mounting box bolted to one side outer wall of the mounting seat, a collection cylinder slidably fitted inside the mounting box, and a dust removal fan bolted to one side outer wall of the mounting seat. A slurry cylinder is bolted to the top of the base. Each of the two mounting seats has a pushing assembly on one side and a transmission assembly on one side. A winding assembly is located between the two mounting seats.

[0008] Preferably, support rollers are connected to the upper outer walls of the two mounting seats on opposite sides via bearings, and two guide rollers are connected to the lower outer walls of the two mounting seats on opposite sides via bearings.

[0009] Preferably, a mounting bracket is bolted to one outer wall of the mounting base, and the conveying motor is bolted to one outer wall of the mounting bracket. One end of the output shaft of the conveying motor is connected to a driving synchronous pulley via a pin, and one end of the conveying roller is connected to a driven synchronous pulley via a pin. The driven synchronous pulley and the driving synchronous pulley form a transmission connection via a synchronous belt.

[0010] Preferably, the bottom end of the piston rod of the extrusion cylinder is bolted to a mounting frame, and the two sides of the mounting frame abut against the outer wall of one side of the two mounting seats. Two limiting rods are bolted to the top outer wall of the mounting frame, and the two limiting rods pass through and slide on the outer wall of the mounting plate. The two ends of the extrusion roller pass through and are connected to the outer walls of the two sides of the mounting frame through bearings. Slides are opened on the outer walls of the two mounting seats, and the two ends of the extrusion roller are slidably installed in the two slides.

[0011] The above scheme uses a compression cylinder to drive the mounting frame and compression rollers to descend. The compression rollers and conveyor rollers work together to compress one end of the substrate. Then, the output shaft of the conveyor motor drives the conveyor rollers to rotate via a synchronous belt. The conveyor rollers and compression rollers work together to convey the substrate. At the same time, one end of the substrate hangs down and moves between two ultrasonic dust collectors, two high-voltage ion generators, two atomizing depositors, and two terahertz pulse irradiators.

[0012] Preferably, an end cap is bolted to one outer wall of the mounting box, and one end of the collecting cylinder is slidably fitted onto the outer wall of the end cap. A sealing cap is screwed onto the inner wall of one end of the collecting cylinder. A conveying pipe is connected to the air inlet of the dust removal fan by a clamp, and one end of the conveying pipe is threaded onto the outer wall of the sealing cap.

[0013] With the above scheme, when the drooping end of the substrate moves between the two ultrasonic dust collectors, the two ultrasonic dust collectors use ultrasonic waves propagating in the air to generate sound wave vibrations or airflow disturbances to remotely disperse dust. The dust removal fan operates to draw the dust floating in the external environment into the collection cylinder, and the collection cylinder collects the dust.

[0014] Preferably, a cylinder cover is bolted to the top outer wall of the slurry cylinder, and the slurry cylinder is connected to two atomizing depositors through hoses, with a peristaltic pump at one end of each hose.

[0015] Preferably, the pushing assembly includes a fixed frame bolted to one outer wall of the mounting base, a pushing cylinder bolted to one outer wall of the fixed frame, a clamping cylinder connected to one end of the piston rod of the pushing cylinder via a bearing, and a driven gear connected to one outer wall of the clamping cylinder via a pin. A regular hexagonal groove is formed on one outer wall of the clamping cylinder.

[0016] Preferably, the transmission assembly includes a mounting block connected to the outer wall of one end of the clamping cylinder via a bearing, a transmission motor connected to the outer wall of one side of the mounting block via bolts, and a drive gear connected to one end of the output shaft of the transmission motor via a spline. The bottom of the mounting block abuts against the inner wall of the bottom of the fixing frame. A through hole is opened on one side of the outer wall of the fixing frame, and the transmission motor is sleeved in the through hole. The driven gear and the drive gear mesh with each other to form a transmission engagement.

[0017] Preferably, the winding assembly includes a mounting shaft, two hexagonal connecting posts, and a winding roller connected to the outer wall of the mounting shaft by a pin. The upper outer walls of the two mounting seats each have a channel, and the two ends of the mounting shaft are slidably fitted into the two channels respectively. The two connecting posts are respectively welded to the outer walls of the two ends of the mounting shaft, and the two connecting posts are respectively inserted into the slots on the two clamping cylinders.

[0018] The above scheme involves moving the mounting shaft along the channel, pushing the piston rod of the cylinder to move the clamping cylinder, inserting the clamping cylinder into the outside of the connecting column, clamping and fixing the mounting shaft and the winding roller, and the output shaft of the transmission motor driving the drive gear to rotate, which in turn drives the driven gear and the clamping cylinder to rotate. The clamping cylinder drives the winding roller to rotate and wind up the substrate.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The conveying roller and the extrusion roller work together to convey the substrate. At the same time, one end of the substrate hangs down and moves between two ultrasonic dust collectors. When the hanging end of the substrate moves between the two ultrasonic dust collectors, the two ultrasonic dust collectors use ultrasonic waves propagating in the air to generate sound wave vibrations or airflow disturbances to remotely disperse dust. The dust removal fan operates to draw the dust floating in the external environment into the collection cylinder. The collection cylinder collects the dust and can clean the dust attached to the substrate in real time, preventing secondary pollution of the substrate during the conveying process, avoiding the inability of the slurry to adhere firmly to the substrate, and improving the coating effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall main structure of the coating device for producing filter membranes based on electrostatic coating method proposed in this invention.

[0022] Figure 2 This is a schematic side view of the overall structure of the coating device for producing filter membranes based on electrostatic coating method proposed in this invention.

[0023] Figure 3 This is a front view schematic diagram of the installation mechanism of the coating device for producing filter membranes based on electrostatic coating method proposed in this invention.

[0024] Figure 4 This is a bottom view of the installation mechanism of the coating device for producing filter membranes based on electrostatic coating method proposed in this invention.

[0025] Figure 5 This is a schematic diagram of the main structure of the conveying component of the coating device for producing filter membranes based on electrostatic coating method proposed in this invention.

[0026] Figure 6 This is a schematic diagram of the main structure of the dispersion extrusion component of the coating device for producing filter membranes based on electrostatic coating method proposed in this invention.

[0027] Figure 7 This is a schematic diagram of the main structure of the dust removal component of the coating device for producing filter membranes based on electrostatic coating method proposed in this invention.

[0028] Figure 8 This is a schematic diagram of the pushing component structure of the coating device for producing filter membranes based on electrostatic coating method proposed in this invention.

[0029] Figure 9 This is a schematic diagram of the main structure of the transmission component of the coating device for producing filter membranes based on electrostatic coating method proposed in this invention.

[0030] Figure 10 This is a schematic diagram of the main structure of the winding assembly of the coating device for producing filter membranes based on electrostatic coating method proposed in this invention.

[0031] In the diagram: 1. Base; 2. Mounting mechanism; 201. Mounting seat; 202. Support roller; 203. Ultrasonic dust collector; 204. High-pressure ion generator; 205. Atomizing depositor; 206. Terahertz pulse irradiator; 207. Guide roller; 3. Conveying assembly; 301. Mounting frame; 302. Conveying motor; 303. Conveying roller; 4. Extrusion assembly; 401. Mounting plate; 402. Extrusion cylinder; 403. Mounting frame; 404. Limiting rod; 405. Extrusion roller; 5. Dust collection assembly; 501, mounting box; 502, end cap; 503, collection cylinder; 504, sealing cap; 505, dust removal fan; 506, conveying pipe; 6, slurry cylinder; 7, pushing assembly; 701, fixing frame; 702, pushing cylinder; 703, clamping cylinder; 704, driven gear; 8, transmission assembly; 801, mounting block; 802, transmission motor; 803, driving gear; 9, winding assembly; 901, mounting shaft; 902, connecting column; 903, winding roller; 10, substrate. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Example 1, referring to Figure 1-6A coating apparatus for producing filter membranes based on electrostatic coating includes a base 1 and a substrate 10. The top of the base 1 is equipped with a mounting mechanism 2, which includes two mounting seats 201 bolted to the outer wall of the top of the base 1, two ultrasonic dust collectors 203 bolted to the outer walls of opposite sides of the two mounting seats 201, two atomizing depositors 205 bolted to the outer walls of opposite sides of the two mounting seats 201, and two bolted to the outer walls of opposite sides of the two mounting seats 201. The terahertz pulse irradiator 206 has two mounting bases 201 with support rollers 202 connected to the upper outer walls of opposite sides via bearings. Two guide rollers 207 are connected to the lower outer walls of opposite sides of the two mounting bases 201 via bearings. A conveying assembly 3 is provided between the two mounting bases 201. The conveying assembly 3 includes a conveying motor 302 and conveying rollers 303, each penetrating through and connected to the outer walls of the two mounting bases 201 via bearings. A mounting bracket 301 is bolted to one outer wall of each mounting base 201. 02 is bolted to one outer wall of the mounting bracket 301. One end of the output shaft of the conveyor motor 302 is connected to a driving synchronous pulley via a pin, and one end of the conveyor roller 303 is connected to a driven synchronous pulley via a pin. The driven synchronous pulley and the driving synchronous pulley form a transmission engagement via a synchronous belt. An extrusion assembly 4 is provided above the conveyor roller 303. The extrusion assembly 4 includes a mounting plate 401 bolted to the top outer wall of the two mounting seats 201, an extrusion cylinder 402 bolted to the top outer wall of the mounting plate 401, and an extrusion roller 405. The piston rod of the air cylinder 402 is bolted to a mounting frame 403. The two sides of the mounting frame 403 abut against the outer wall of one side of the two mounting seats 201. Two limit rods 404 are bolted to the top outer wall of the mounting frame 403. The two limit rods 404 pass through and slide on the outer wall of the mounting plate 401. The two ends of the extrusion roller 405 pass through and are connected to the outer walls of the mounting frame 403 on both sides through bearings. The outer walls of the two mounting seats 201 are provided with slide rails. The two ends of the extrusion roller 405 are slidably installed in the two slide rails.

[0034] Example 2, refer to Figure 7The coating device for producing filter membranes based on electrostatic coating also includes two dust removal components 5. Each dust removal component 5 includes a mounting box 501 bolted to one outer wall of the mounting base 201, a collection cylinder 503 slidably fitted inside the mounting box 501, and a dust removal fan 505 bolted to one outer wall of the mounting base 201. An end cap 502 is bolted to one outer wall of the mounting box 501. One end of the collection cylinder 503 passes through and is slidably fitted onto the outer wall of the end cap 502. A sealing cap 504 is screwed onto the inner wall of one end of the collection cylinder 503. A conveying pipe 506 is connected to the air inlet of the dust removal fan 505 via a clamp. One end of the conveying pipe 506 passes through and is screwed onto the outer wall of the sealing cap 504. Air inlets are opened on both the collection cylinder 503 and one outer wall of the mounting base 201.

[0035] Example 3, referring to Figure 1-2 The coating device for producing filter membranes based on electrostatic coating method also includes a slurry cylinder 6 connected to the top of the base 1 by bolts, a cylinder cover connected to the outer wall of the top of the slurry cylinder 6 by bolts, and the slurry cylinder 6 connected to two atomizing depositors 205 through hoses, with a peristaltic pump at one end of each hose.

[0036] Example 4, refer to Figure 8-10The coating apparatus for producing filter membranes based on electrostatic coating also includes two pushing components 7. Each pushing component 7 includes a fixed frame 701 bolted to one outer wall of the mounting base 201, a pushing cylinder 702 bolted to one outer wall of the fixed frame 701, a clamping cylinder 703 connected to one end of the piston rod of the pushing cylinder 702 via a bearing, and a driven gear 704 connected to one outer wall of the clamping cylinder 703 via a pin. A hexagonal slot is formed on one outer wall of the clamping cylinder 703. Each of the two mounting bases 201 has a transmission component 8 on one side. Each transmission component 8 includes a mounting block 801 connected to one outer wall of the clamping cylinder 703 via a bearing, a drive motor 802 bolted to one outer wall of the mounting block 801, and a drive gear 803 connected to one end of the output shaft of the drive motor 802 via a spline. The bottom of the mounting block 801 abuts against... The fixed frame 701 is attached to the inner wall of the bottom. A through hole is opened on one side of the outer wall of the fixed frame 701. The drive motor 802 is sleeved in the through hole. The driven gear 704 and the driving gear 803 mesh with each other to form a transmission engagement. A winding assembly 9 is provided between the two mounting seats 201. The winding assembly 9 includes a mounting shaft 901, two hexagonal connecting columns 902 and a winding roller 903 connected to the outer wall of the mounting shaft 901 by a pin. The upper outer wall of the two mounting seats 201 has a channel. The two ends of the mounting shaft 901 are slidably sleeved in the two channels respectively. The two connecting columns 902 are welded to the outer walls of the two ends of the mounting shaft 901 respectively. The two connecting columns 902 are inserted into the slots on the two clamping cylinders 703 respectively. The substrate 10 is located on the top of the support roller 202 and the conveying roller 303 respectively. At the same time, the substrate 10 is located on the outer wall of the two guide rollers 207 and the winding roller 903.

[0037] The conveying roller 303 and the extrusion roller 405 cooperate to convey the substrate 10. Simultaneously, one end of the substrate 10 hangs down and moves between two ultrasonic dust collectors 203, two high-voltage ion generators 204, two atomizing depositors 205, and two terahertz pulse irradiators 206. As the hanging end of the substrate 10 moves between the two ultrasonic dust collectors 203, the two ultrasonic dust collectors 203 utilize ultrasonic waves propagating in the air to generate sound wave vibrations or airflow disturbances, remotely dispersing dust. The dust removal fan 505 operates to remove dust floating in the external environment. Dust is drawn into the collection cylinder 503, which collects the dust. Two high-voltage ion generators 204 deliver electrons to the surface of the non-conductive material substrate. Two atomizing depositors 205 deliver slurry to the surface of the substrate 10. Two terahertz pulse irradiators 206 dry the substrate 10 with the slurry attached. Then, the output shaft of the drive motor 802 drives the drive gear 803 to rotate, which in turn drives the driven gear 704 and the clamping cylinder 703 to rotate. The clamping cylinder 703 drives the winding roller 903 to rotate and wind up the substrate 10.

[0038] 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 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 limitations on this invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coating apparatus for producing filter membranes based on electrostatic coating method, comprising a base (1) and a substrate (10), characterized in that, The base (1) is provided with a mounting mechanism (2) on the top. The mounting mechanism (2) includes two mounting seats (201) that are respectively bolted to the outer wall of the top of the base (1), two ultrasonic dust collectors (203) that are respectively bolted to the outer wall of the opposite side of the two mounting seats (201), two atomizing depositors (205) that are respectively bolted to the outer wall of the opposite side of the two mounting seats (201), and two terahertz pulse irradiators (206) that are respectively bolted to the outer wall of the opposite side of the two mounting seats (201). A conveying assembly (3) is provided between the two mounting bases (201). The conveying assembly (3) includes a conveying motor (302) and conveying rollers (303) that pass through both ends and are connected to the outer walls of the two mounting bases (201) by bearings. The extrusion assembly (4) is provided above the conveying roller (303). The extrusion assembly (4) includes a mounting plate (401) bolted to the top outer wall of the two mounting bases (201), an extrusion cylinder (402) bolted to the top outer wall of the mounting plate (401), and an extrusion roller (405). Dust removal components (5) are provided on one outer wall of each of the two mounting bases (201). The dust removal components (5) include a mounting box (501) bolted to one outer wall of the mounting base (201), a collection cylinder (503) slidably sleeved in the mounting box (501), and a dust removal fan (505) bolted to one outer wall of the mounting base (201). The base (1) is bolted to the top of a slurry cylinder (6); Each of the two mounting bases (201) is provided with a pushing component (7) on one side, and each of the two mounting bases (201) is provided with a transmission component (8) on one side, and a winding component (9) is provided between the two mounting bases (201).

2. The coating apparatus for producing filter membranes based on electrostatic coating method according to claim 1, characterized in that, Support rollers (202) are connected to the upper outer walls of the two mounting seats (201) on opposite sides by bearings, and guide rollers (207) are connected to the lower outer walls of the two mounting seats (201) on opposite sides by bearings.

3. The coating apparatus for producing filter membranes based on electrostatic coating method according to claim 1, characterized in that, The mounting base (201) is bolted to one side of the outer wall of the mounting bracket (301), and the conveying motor (302) is bolted to one side of the outer wall of the mounting bracket (301). One end of the output shaft of the conveying motor (302) is connected to the driving synchronous pulley by a pin, and one end of the conveying roller (303) is connected to the driven synchronous pulley by a pin. The driven synchronous pulley and the driving synchronous pulley form a transmission cooperation through a synchronous belt.

4. The coating apparatus for producing filter membranes based on electrostatic coating method according to claim 1, characterized in that, The piston rod of the extrusion cylinder (402) is bolted to a mounting frame (403), and the two sides of the mounting frame (403) abut against the outer wall of one side of the two mounting seats (201). The top outer wall of the mounting frame (403) is bolted to two limiting rods (404), and the two limiting rods (404) pass through and slide on the outer wall of the mounting plate (401). The two ends of the extrusion roller (405) pass through and are connected to the outer walls of the two sides of the mounting frame (403) through bearings. The outer walls of the two mounting seats (201) are provided with slides, and the two ends of the extrusion roller (405) slide in the two slides.

5. The coating apparatus for producing filter membranes based on electrostatic coating method according to claim 1, characterized in that, An end cap (502) is bolted to one side of the outer wall of the mounting box (501), and one end of the collecting cylinder (503) is slidably fitted onto the outer wall of the end cap (502). A sealing cap (504) is screwed onto the inner wall of one end of the collecting cylinder (503). The air inlet of the dust removal fan (505) is connected to a conveying pipe (506) by a clamp, and one end of the conveying pipe (506) is slidably fitted onto the outer wall of the sealing cap (504).

6. The coating apparatus for producing filter membranes based on electrostatic coating method according to claim 1, characterized in that, The top outer wall of the slurry cylinder (6) is bolted with a cylinder cover. The slurry cylinder (6) is connected to two atomizing depositors (205) through a hose, and a peristaltic pump is provided at one end of each hose.

7. The coating apparatus for producing filter membranes based on electrostatic coating method according to claim 1, characterized in that, The pushing assembly (7) includes a fixed frame (701) bolted to the outer wall of the mounting base (201), a pushing cylinder (702) bolted to the outer wall of the fixed frame (701), a clamping cylinder (703) connected to one end of the piston rod of the pushing cylinder (702) by a bearing, and a driven gear (704) connected to one end of the outer wall of the clamping cylinder (703) by a pin. A hexagonal slot is provided on one end of the outer wall of the clamping cylinder (703).

8. The coating apparatus for producing filter membranes based on electrostatic coating method according to claim 7, characterized in that, The transmission assembly (8) includes a mounting block (801) connected to the outer wall of one end of the clamping cylinder (703) by a bearing, a transmission motor (802) connected to the outer wall of one side of the mounting block (801) by bolts, and a drive gear (803) connected to one end of the output shaft of the transmission motor (802) by a spline. The bottom of the mounting block (801) abuts against the inner wall of the bottom of the fixing frame (701). A through hole is opened on one side of the outer wall of the fixing frame (701), and the transmission motor (802) is sleeved in the through hole. The driven gear (704) and the drive gear (803) mesh with each other to form a transmission engagement.

9. The coating apparatus for producing filter membranes based on electrostatic coating method according to claim 1, characterized in that, The winding assembly (9) includes a mounting shaft (901), two hexagonal connecting posts (902), and a winding roller (903) connected to the outer wall of the mounting shaft (901) by a pin. The upper outer walls of the two mounting seats (201) are provided with channels, and the two ends of the mounting shaft (901) are respectively slidably sleeved in the two channels. The two connecting posts (902) are respectively welded to the outer walls of the two ends of the mounting shaft (901), and the two connecting posts (902) are respectively inserted into the slots on the two clamping cylinders (703).

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