Double-sided coating device for laboratory
Through the laboratory double-sided coating device, the substrate is coated on both sides of the fixture at the same time, solving the problems of low coating efficiency and differences in the performance of the two-sided diaphragm in the prior art, and achieving an efficient and uniform coating effect.
Patent Information
- Application Number
- CN202411682799.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-02-18
AI Technical Summary
In the prior art, the coating efficiency is low, resulting in differences in the performance of the two sides of the diaphragm.
Provided is a double-sided coating device for laboratory, including a groove body and a clamp, the clamp is provided with a first coating area and a second coating area, and the substrate is fixed to the clamp and is at least partially immersed in the slurry, so as to achieve both sides simultaneously Coated.
It improves coating efficiency, avoids differences in performance on both sides of the diaphragm, and has a simple structure, low cost and simple operation, and is suitable for laboratory coating operations.
Smart Images
Figure CN119456308A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of battery separators, and more particularly to a double-sided coating device for laboratory use. Background Art
[0002] As an important component of electrochemical devices, diaphragms play an irreplaceable role in industrial production. Both batteries and electrolytic cells require diaphragms. In order to achieve different functions, diaphragms are often made of multiple layers of materials. One layer is the substrate, which is made of porous polymer materials or polymer woven mesh. In order to achieve different functions, functional materials need to be coated on one or both sides of the substrate. Currently, the commonly used coating processes include roller coating, dip coating, extrusion coating, etc. These large-scale equipment can achieve mass production of diaphragms. However, in the laboratory, considering the cost, small wire rod coaters are often used. However, this small wire rod coater can only coat one side at a time. After one side is dry, the other side is coated. This two-sided coating device and coating method: on the one hand, the coating efficiency is low, and on the other hand, it will cause differences in the performance of the two sides of the diaphragm. Summary of the invention
[0003] The purpose of the present invention is to overcome the shortcomings of low coating efficiency and performance differences between the two sides of the diaphragm in the prior art, and to provide a laboratory double-sided coating device and coating method, which can coat both sides of the diaphragm at the same time, have high coating efficiency, and can avoid performance differences between the two sides of the diaphragm.
[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:
[0005] A double-sided coating device for laboratory use is provided, comprising a trough body for containing slurry and a clamp for fixing a substrate, wherein the clamp is provided with a first coating area and a second coating area respectively located at two opposite sides of the substrate and penetrating the clamp, and the first coating area and the second coating area are at least partially disposed in the trough body.
[0006] The laboratory double-sided coating device of the present invention fixes the substrate on the fixture, and at least partially immerses the fixture in the slurry in the tank body, and the first coating area and the second coating area are also at least partially immersed in the slurry. The slurry is simultaneously filled into the first coating area and the second coating area, and the fixture is taken out to achieve simultaneous coating of the first coating area and the second coating area. The laboratory double-sided coating device of the present invention can achieve simultaneous coating of both sides of the substrate, with high coating efficiency, avoiding the performance difference of the two sides of the diaphragm caused by coating the two sides of the diaphragm in sequence; and the present invention has a simple structure, low equipment cost, simple operation, and small equipment occupancy volume, and is particularly suitable for laboratory coating operations.
[0007] Furthermore, the fixture includes a plurality of first clamping frames and a plurality of second clamping frames that are detachably connected, the first coating area is located in the first clamping frame, the second coating area is located in the second clamping frame, and the number of the first clamping frames and the second clamping frames are equal and symmetrically arranged. By setting the number of the first clamping frames and the second clamping frames, the coating thickness can be adjusted; by setting the thickness of the first clamping frame and the second clamping frame to be consistent, the coating thickness on both sides of the substrate can be kept consistent.
[0008] Furthermore, the first coating area and the second coating area have the same size, and the lengths of the first coating area and the second coating area are both smaller than the length of the substrate, and the widths of the first coating area and the second coating area are both smaller than the width of the substrate. By setting the relative sizes of the substrate and the first coating area and the second coating area, on the one hand, the substrate is stably clamped between the first clamping frame and the second clamping frame, and on the other hand, the slurry in the first coating area and the second coating area can be completely coated on the surface of the substrate to achieve uniform coating.
[0009] Furthermore, the first clamp frame and the second clamp frame are detachably connected via a first connecting member, and first connecting holes are provided at four corners of the first clamp frame and the second clamp frame, and the first connecting member is detachably connected to the first connecting hole. The first connecting member is removed from the first connecting hole, or the first connecting member is loosened from the first connecting hole, and the substrate is placed between the first clamp frame and the second clamp frame; then the first connecting member is connected to the first connecting hole, or the first connecting member is tightened into the first connecting hole, and the substrate is fixed between the first clamp frame and the second clamp frame.
[0010] Furthermore, the length of the substrate is smaller than the distance between two adjacent first connectors in the length direction, and the width of the substrate is smaller than the distance between two adjacent first connectors in the width direction. When fixing the substrate, the first connector does not pass through the substrate, so as to avoid the substrate perforation having an adverse effect on the performance of the substrate.
[0011] Furthermore, it also includes a scraper connected to the tank body, and the two opposite sides of the clamp are both in contact with the scraper. When the clamp is taken out, since the two sides of the clamp are both in contact with the scraper, the scraper scrapes off the excess slurry along the surface of the clamp, so that the coating thickness of the two sides of the substrate is the thickness of the first coating area and the second coating area, so that the coating thickness of the two sides of the substrate can be controlled by controlling the thickness of the first coating area and the second coating area.
[0012] Furthermore, the scraper includes a first scraper and a second scraper, both of which are movably connected to the tank body, and are respectively arranged in contact with two opposite sides of the clamp. The first scraper and the second scraper are respectively located on two opposite sides of the clamp, and the distance between the first scraper and the second scraper is adjustable, which can play a role in fixing the clamp, and can also scrape off excess slurry on the surface of the clamp to control the coating thickness when the clamp is removed.
[0013] Furthermore, the first scraper and the second scraper are both connected to the trough body through a second connecting member, and the first scraper and the second scraper are both provided with a second connecting hole, and the second connecting member is connected to the trough body through the second connecting hole. Among them, multiple second connecting holes can be provided evenly distributed, and the second connecting member can be connected to different second connecting holes to adjust the distance between the first scraper and the second scraper; the second connecting hole can also be set as a waist-shaped hole, so as to achieve continuous adjustment of the distance between the first scraper and the second scraper.
[0014] Furthermore, the second connection hole is a U-shaped hole with one end open. After tightening or loosening the second connection piece, the scraper can be installed and removed from the trough body by plugging and pulling out the scraper, which is easy to operate.
[0015] Furthermore, the first scraper and the second scraper are respectively connected to the top surfaces of the two opposite side walls of the tank body, and the clamp is vertically arranged between the first scraper and the second scraper. The first scraper and the second scraper are arranged horizontally, and the clamp is arranged vertically, so that the clamping is stable, the operation is simple, and the adverse effects of the clamp removal process on the slurry coating can be avoided.
[0016] Furthermore, the distance between the first scraper and the second scraper is equal to the total thickness of the clamp and the substrate. When the distance between the first scraper and the second scraper is equal to the total thickness of the clamp and the substrate, the first scraper and the second scraper can fix the clamp without affecting the removal of the clamp, and can also scrape off excess slurry when the clamp is removed.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] The laboratory double-sided coating device of the present invention can realize simultaneous coating of both sides of a substrate with high coating efficiency, thereby effectively avoiding performance differences between the two sides of the diaphragm; and the present invention has a simple structure, low equipment cost, easy operation, and small equipment volume, and is particularly suitable for laboratory coating operations. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of a double-sided coating device for laboratory use;
[0020] Figure 2It is a schematic diagram of the structure of the fixture of the double-sided coating device for laboratory use;
[0021] Figure 3 It is a schematic structural diagram of the second clamping frame of the double-sided coating device for laboratory use;
[0022] Figure 4 A schematic diagram of the coordination of the fixture and the scraper of the double-sided coating device for laboratory use;
[0023] In the accompanying drawings: 100, trough body; 200, clamp; 210, first coating area; 220, second coating area; 230, first clamp frame; 240, second clamp frame; 250, first connecting member; 260, first connecting hole; 300, scraper; 310, first scraper; 320, second scraper; 330, second connecting hole; 340, second connecting member; 350, gasket; 400, slurry; 500, substrate. DETAILED DESCRIPTION
[0024] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.
[0025] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0026] Embodiment 1
[0027] This embodiment is the first embodiment of the laboratory double-sided coating device of the present invention, comprising a trough body 100 for containing slurry 400, a fixture 200 for fixing a substrate 500, the fixture 200 is provided with a first coating area 210 and a second coating area 220 respectively located at two opposite sides of the substrate 500 and penetrating the fixture 200, the first coating area 210 and the second coating area 220 are at least partially disposed in the trough body 100, and the two opposite side surfaces of the fixture 200 are both in contact with the scraper 300, as shown in FIG. Figure 1The first coating area 210 and the second coating area 220 are coating areas, which may be specifically groove-shaped structures.
[0028] In this embodiment, the tank body 100 can be set as a square tank with an upper opening. In order to facilitate the installation and connection of the scraper 300, the tank body 100 of this embodiment needs to be set to a certain thickness. The slurry 400 is contained in the tank body 100, so the tank body 100 is generally made of corrosion-resistant material. The slurry contained in the tank body 100 is a slurry with a relatively high viscosity. In the process of quickly removing the fixture 200 from the tank body 100, there will be no situation where the top is thin and the bottom is thick. The double-sided coating of the substrate 500 can be achieved while removing the fixture 200. However, due to the high viscosity of the slurry, it is difficult to ensure the uniformity of the final coating film under the action of surface tension and gravity. Therefore, in this embodiment, a scraper 300 is provided. Specifically, the scraper 300 is connected to the trough body 100, and the two opposite sides of the clamp 200 are both arranged in contact with the scraper 300. The scraper 300 is used to fix the clamp 200 on the one hand, and on the other hand, when the clamp 200 is removed, the excess slurry on the surface of the substrate can be scraped off, so that the final diaphragm is flat.
[0029] In this embodiment, the scraper 300 can be a single scraper 300 connected to the tank body 100, or two scrapers 300 respectively located on both sides of the clamp 200. The scraper 300 can be horizontally arranged at the top of the tank body 100 or in the middle of the tank body 100, but no matter where the scraper 300 is arranged, its position should be higher than the height of the liquid level of the slurry 400 to achieve the function of scraping off excess slurry 400.
[0030] When a scraper 300 is used, the connection between the scraper 300 and the tank body 100 can be specifically abutting connection. Specifically: the length of the scraper 300 is set to be larger than the length or width of the tank body 100, so that the two ends of the scraper 300 are respectively placed on two opposite sides of the tank body 100; the connection between the scraper 300 and the tank body 100 can also be a fixed connection such as a snap connection or a threaded connection. The connection between the scraper 300 and the tank body 100 can also be a fixed connection such as a snap connection or a threaded connection to avoid the relative position of the scraper 300 and the tank body 100 from shifting during the process of taking and placing the clamp 200.
[0031] When a scraper 300 is used to fix the fixture 200, a plurality of fixing holes can be set on the scraper 300, and the size of the fixing holes is designed to be equal to the length and width of the fixture 200 after the substrate 500 is fixed. In specific implementation, the fixture 200 after the substrate 500 is fixed is placed downward from the fixing hole into the tank 100 until the first coating area 210 and the second coating area 220 are partially immersed in the slurry 400; when the fixture 200 is taken out, the two opposite sides of the fixture 200 contact the two opposite hole walls of the fixing hole, so that the excess slurry 400 is scraped off to control the coating thickness. Among them, the width and / or length of the plurality of fixing holes can be equal or unequal; when the width and / or length of each fixing hole are unequal, the placement of fixtures of various specifications can be realized at the same time, and the preparation of various experimental samples can be carried out at the same time. For a fixture 200 with a relatively light weight, the fixture 200 can be fixed by utilizing the contact friction between the fixture 200 and the fixing hole. For a fixture 200 with a relatively heavy weight, if the contact friction between the fixture 200 and the fixing hole alone is not sufficient to fix the fixture 200, the installation stability of the fixture 200 can be improved by utilizing the bottom of the fixture 200 to contact and support with the bottom of the trough body 100, or by providing a supporting device at the bottom of the fixture 200, or by connecting a fixing device at the bottom of the fixture 200.
[0032] When two scrapers 300 are used to fix the fixture 200, the fixing position is formed between the two scrapers 300, and the distance between the two scrapers 300 is adjusted to be equal to the thickness of the fixture 200 after fixing the substrate 500. In specific implementation, the fixture 200 after fixing the substrate 500 is placed downwardly into the tank body 100 from the fixing position until the first coating area 210 and the second coating area 220 are partially immersed in the slurry 400; when the fixture 200 is taken out, the two opposite sides of the fixture 200 contact the end planes of the two scrapers 300, so that the excess slurry 400 is scraped off to control the coating thickness. For a clamp 200 with a relatively light weight, the contact friction between the clamp 200 and the scraper 300 can be used to fix the clamp 200; for a clamp 200 with a relatively heavy weight, if the contact friction between the clamp 200 and the scraper 300 is not sufficient to fix the clamp 200, the installation stability of the clamp 200 can be improved by using the bottom of the clamp 200 to contact the bottom of the trough body 100 for support, or by providing a supporting device at the bottom of the clamp 200, or by connecting a fixing device at the bottom of the clamp 200.
[0033] In this embodiment, the clamp 200 is used to fix the substrate 500. When the substrate 500 is a thin film product, the substrate 500 needs to be fixed and the slurry 400 needs to be coated on both sides of the substrate 500 through the first coating area 210 and the second coating area 220. The clamp 200 of this embodiment includes two sets of clamp frames, and the substrate 500 is clamped between the two sets of clamp frames. As for the connection between the two sets of clamp frames: a connection form of rotating connection at one end and clamping at the other end can be adopted, a connection form of active connection at multiple locations can also be adopted, and a connection form of detachable connection at multiple locations can also be adopted. This embodiment does not limit it. The clamp 200 that can change the gap between the two clamp frames to clamp the substrate 500 between the two clamp frames can be applicable to the present invention. When the clamp 200 clamps the substrate, in order to achieve consistency in coating on both sides of the substrate 500, the flatness and consistency of the two sides of the substrate 500 are also extremely important; in this embodiment, when the substrate 500 is clamped in the clamp 200, the substrate 500 is in a taut state with both sides flat.
[0034] The coating range on both sides of the substrate 500 of this embodiment is determined by multiple factors such as the area of the first coating area 210 and the second coating area 220 and the depth of the first coating area 210 and the second coating area 220 immersed in the slurry 400. For example: when it is necessary to fully coat the slurry 400 in the first coating area 210 and the second coating area 220, the first coating area 210 and the second coating area 220 are completely immersed in the slurry 400. At this time, the height of the slurry 400 in the tank body 100 can be increased, or the position of the scraper 300 can be moved down to achieve the purpose; when it is necessary to partially coat the slurry 400 in the first coating area 210 and the second coating area 220, the first coating area 210 and the second coating area 220 are moved up to partially move out of the slurry 400. At this time, the height of the slurry 400 in the tank body 100 can be reduced, or the position of the scraper 300 can be moved up to achieve the purpose. Of course, it is also possible to cut off a part of the area on the coated substrate 500 for testing as needed.
[0035] The laboratory double-sided coating device of this embodiment has the following specific working process:
[0036] The substrate 500 is fixed to the fixture 200, and the fixture 200 is at least partially immersed in the slurry 400 in the tank body 100. The first coating area 210 and the second coating area 220 are also at least partially immersed in the slurry 400. The slurry 400 is simultaneously filled into the first coating area 210 and the second coating area 220, and the fixture 200 is taken out. While the fixture 200 is taken out, since both sides of the fixture 200 are in contact with the scraper 300, the scraper 300 scrapes off the excess slurry 400 along the surface of the fixture 200 while the fixture 200 is taken out, so that the thickness of the coating on both sides of the substrate 500 is the thickness of the first coating area 210 and the second coating area 220. In this way, the substrate 500 can be coated on both sides at the same time, the coating efficiency is high, and the coating thickness on both sides of the substrate 500 can be controlled, thereby effectively avoiding the performance difference between the two sides of the diaphragm.
[0037] Embodiment 2
[0038] This embodiment is the second embodiment of the laboratory double-sided coating device of the present invention. This embodiment is similar to the first embodiment, except that in this embodiment, the fixture 200 includes a plurality of first clamping frames 230 and a plurality of second clamping frames 240 that are detachably connected. The first coating area 210 is located in the first clamping frame 230, and the second coating area 220 is located in the second clamping frame 240. The number of the first clamping frames 230 and the second clamping frames 240 is equal and symmetrically arranged, such as Figure 2 In this embodiment, the first coating area 210 is specifically a first coating groove located inside the first clamping frame 230 , and the second coating area 220 is specifically a second coating groove located inside the second clamping frame 240 .
[0039] When this embodiment is implemented, the coating thickness on one side of the substrate 500 is equal to the number of first clamping frames 230 multiplied by the thickness of a single first clamping frame 230, or the coating thickness on one side of the substrate 500 is equal to the number of second clamping frames 240 multiplied by the thickness of a single second clamping frame 240. Among them, the thickness of several first clamping frames 230 can be equal or unequal; the thickness of several second clamping frames 240 can be equal or unequal. Therefore, when the thickness of several first clamping frames 230 is unequal and the thickness of the second clamping frames 240 is unequal, the selection of coating thickness is more flexible and the applicable test scenarios are more extensive. In this embodiment, by setting the number of first clamping frames 230 and second clamping frames 240, the coating thickness can be adjusted to adapt to different test requirements; by setting the thickness of the first clamping frame 230 and the second clamping frame 240 to be consistent, the coating thickness on both sides of the substrate 500 can be kept consistent, thereby maintaining the consistency of the performance of both sides of the substrate 500.
[0040] Regardless of whether the size of the substrate 500 is larger or smaller than the first coating area 210 and the second coating area 220, the substrate 500 can be fixed between the first clamping frame 230 and the second clamping frame 240 to achieve dip coating. However, in order to achieve uniform and stable coating and to maintain the consistency of coating on both sides of the substrate 500 as much as possible, in this embodiment, the first coating area 210 and the second coating area 220 have the same size, and the lengths of the first coating area 210 and the second coating area 220 are both smaller than the length of the substrate 500, and the widths of the first coating area 210 and the second coating area 220 are both smaller than the width of the substrate 500. Such a configuration allows, on the one hand, the substrate 500 to be stably clamped between the first clamping frame 230 and the second clamping frame 240, and on the other hand, the slurry 400 in the first coating area 210 and the second coating area 220 can be completely coated on the surface of the substrate 500 to achieve uniform coating. In order to facilitate keeping the substrate 500 in a taut state when clamping the substrate 500, in this embodiment, the length of the substrate 500 is greater than the outer frame length of the first clamping frame 230 or the second clamping frame 240, or the width of the substrate 500 is greater than the outer frame width of the first clamping frame 230 or the second clamping frame 240. In this way, the substrate 500 can partially extend out of the first clamping frame 230 or the second clamping frame 240, so that during the clamping operation, the end of the substrate 500 is pulled to achieve the tautness of the substrate 500.
[0041] Among them, Figure 3 , Figure 4As shown, the first clamping frame 230 and the second clamping frame 240 are detachably connected through the first connecting member 250, and the first clamping frame 230 and the second clamping frame 240 are provided with first connecting holes 260 at four corners, and the first connecting member 250 is detachably connected to the first connecting hole 260. In this embodiment, the first connecting hole 260 can be specifically a screw hole or a through hole, and the first connecting member 250 can be specifically a bolt and a nut. When connecting, one end of the bolt is passed through the screw hole and threadedly connected to the nut. By adjusting the distance between the nut and the bolt head, the gap between the first clamping frame 230 and the second clamping frame 240, between adjacent first clamping frames 230, and between adjacent second clamping frames 240 can be changed, so as to achieve stable clamping of the substrate 500 and prevent the slurry 400 from entering the gap between the first clamping frame 230 and the second clamping frame 240, between adjacent first clamping frames 230, and between adjacent second clamping frames 240. When implementing this embodiment, the first connecting member 250 is removed from the first connecting hole 260, or the first connecting member 250 is loosened from the first connecting hole 260, and the substrate 500 is placed between the first clamping frame 230 and the second clamping frame 240; then the first connecting member 250 is connected to the first connecting hole 260, or the first connecting member 250 is tightened into the first connecting hole 260, so that the substrate 500 can be fixed between the first clamping frame 230 and the second clamping frame 240. When the coating thickness needs to be changed, the number of the first clamping frame 230 and the second clamping frame 240 can be increased or decreased accordingly, which is easy to operate.
[0042] In this embodiment, there are four groups of first connectors 250 and first connection holes 260, the first clamp frame 230 and the second clamp frame 240 are both square frame structures, and the first connectors 250 and the first connection holes 260 are respectively located at the four corners of the first clamp frame 230 and the second clamp frame 240; two groups of first connectors 250 (two first connectors 250 are one group) are distributed in the length direction of the first coating area 210 and the second coating area 220, and two groups of first connectors 250 (two first connectors 250 are one group) are also distributed in the width direction of the first coating area 210 and the second coating area 220; the length of the substrate 500 is less than the distance between two adjacent first connectors 250 in the length direction, and the width of the substrate 500 is less than the distance between two adjacent first connectors 250 in the width direction. In this embodiment, when fixing the substrate 500, the first connector 250 does not pass through the substrate 500, so as to avoid the perforation of the substrate 500 from having an adverse effect on the performance of the substrate 500.
[0043] The specific working principle of this embodiment is as follows:
[0044] According to the coating thickness, the first clamp frame 230 and the number of the first clamp frame 230 are selected, and at the same time, the second clamp frame 240 and the number of the second clamp frame 240 are correspondingly selected, and the substrate 500 is clamped between the first clamp frame 230 and the second clamp frame 240. After the first connecting member 250 passes through the first connecting hole 260, the first clamp frame 230 and the second clamp frame 240 are tightened, so as to fix the substrate 500 between the first clamp frame 230 and the second clamp frame 240; the clamp 200 is immersed in the slurry 400, and the slurry 400 is filled into the first coating area 210 and the second coating area 220. When the clamp 200 is taken out, the scraper 300 scrapes off the excess slurry 400 to obtain a wet film of the set coating thickness. Subsequently, holes can be formed by non-solvent induced phase separation, steam induced phase separation, heat induced phase separation and the like, and finally the composite diaphragm is obtained by drying in an oven.
[0045] Embodiment 3
[0046] This embodiment is the third embodiment of the double-sided coating device for laboratory use of the present invention. This embodiment is similar to the first embodiment or the second embodiment, except that the scraper 300 includes a first scraper 310 and a second scraper 320, the first scraper 310 and the second scraper 320 are both movably connected to the tank body 100, and the first scraper 310 and the second scraper 320 are respectively arranged in contact with two opposite sides of the fixture 200, such as Figure 1 , Figure 4 The first scraper 310 and the second scraper 320 are respectively located at two opposite sides of the fixture 200, and the distance between the first scraper 310 and the second scraper 320 is adjustable, which can play the role of fixing the fixture 200, and can also play the role of scraping off the excess slurry 400 on the surface of the fixture 200 to control the coating thickness when the fixture 200 is moved out.
[0047] When the distance between the first scraper 310 and the second scraper 320 is equal to the total thickness of the clamp 200 and the substrate 500, the first scraper 310 and the second scraper 320 can fix the clamp 200 without affecting the removal of the clamp 200, and can also scrape off excess slurry 400 when the clamp 200 is removed. When the device of this embodiment is used for coating the membrane substrate 500, since the thickness of the membrane is very small and the coating thickness is also very small, the overall weight of the clamp 200 holding the substrate 500 is relatively light. When the distance between the first scraper 310 and the second scraper 320 is equal to the total thickness of the clamp 200 and the substrate 500, the clamp 200 can be fixed by using the contact friction between the first scraper 310, the second scraper 320 and the two opposite sides of the clamp 200. Of course, in order to ensure the stability of the position of the clamp 200, the bottom of the clamp 200 can be supported by contact with the bottom of the trough body 100, or a supporting device can be set at the bottom of the clamp 200, or a fixing device can be connected to the bottom of the clamp 200 to improve the installation stability of the clamp 200.
[0048] In this embodiment, the first scraper 310 and the second scraper 320 are connected to the tank body 100 through the second connecting member 340. The first scraper 310 and the second scraper 320 are provided with a second connecting hole 330, and the second connecting member 340 is connected to the tank body 100 through the second connecting hole 330. Among them, the second connecting holes 330 can be evenly distributed, and the second connecting member 340 is connected to different second connecting holes 330 to adjust the spacing between the first scraper 310 and the second scraper 320; the second connecting hole 330 can also be set as a waist-shaped hole, so as to achieve continuous adjustment of the spacing between the first scraper 310 and the second scraper 320. When the coating thickness is adjusted by the number of the first clamp frame 230 and the second clamp frame 240, the overall thickness of the clamp 200 changes. Accordingly, the spacing between the first scraper 310 and the second scraper 320 is adjusted so that the spacing between the first scraper 310 and the second scraper 320 is the overall thickness of the clamp 200.
[0049] In this embodiment, in order to facilitate the installation and removal of the first scraper 310, the second scraper 320 and the tank body 100 while achieving adjustable positions of the first scraper 310 and the second scraper 320, the second connection hole 330 is a U-shaped hole with one end open. After tightening or loosening the second connector 340, the scraper 300 can be installed and removed from the tank body 100 by plugging in and out, which is easy to operate. In order to prevent the second connector 340 from causing damage to the surface of the first scraper 310 and the second scraper 320, and / or to increase the contact friction between the second connector 340 and the first scraper 310 and the second scraper 320, a gasket 350 is provided between the second connector 340 and the first scraper 310, the second scraper 320 in this embodiment.
[0050] In order to facilitate the adjustment of the distance between the first scraper 310 and the second scraper 320, in this embodiment, the first scraper 310 and the second scraper 320 are respectively connected to the top surfaces of the two opposite side walls of the tank body 100, and the clamp 200 is vertically arranged between the first scraper 310 and the second scraper 320. The first scraper 310 and the second scraper 320 are arranged horizontally, and the clamp 200 is arranged vertically, so the clamping is stable, the operation is simple, and the adverse effect of the removal process of the clamp 200 on the coating of the slurry 400 can be avoided.
[0051] The specific working principle of this embodiment is as follows:
[0052] The first scraper 310 and the second scraper 320 are installed on the top of the trough body 100 through the second connecting piece 340 and the second connecting hole 330, and the distance between the first scraper 310 and the second scraper 320 is adjusted to be equal to the overall thickness of the clamp 200 according to the overall thickness of the clamp 200; the clamp 200 is placed between the first scraper 310 and the second scraper 320; the clamp 200 is immersed in the slurry 400, and the slurry 400 is filled into the first coating area 210 and the second coating area 220. When the clamp 200 is taken out, the scraper 300 scrapes off the excess slurry 400 to obtain a wet film of the set coating thickness, and holes can be subsequently formed by non-solvent induced phase separation, steam induced phase separation, heat induced phase separation and the like, and finally dried in an oven to obtain a composite diaphragm.
[0053] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.
Claims
1. A double-sided coating device for laboratory use, characterized in that: The invention comprises a trough body (100) for containing slurry (400), and a clamp (200) for fixing a substrate (500), wherein the clamp (200) is provided with a first coating area (210) and a second coating area (220) which are respectively located at two opposite sides of the substrate (500) and penetrate the clamp (200), and the first coating area (210) and the second coating area (220) are at least partially disposed in the trough body (100).
2. The double-sided coating device for laboratory use according to claim 1, characterized in that: The clamp (200) comprises a plurality of first clamp frames (230) and a plurality of second clamp frames (240) which are detachably connected, the first coating area (210) is located in the first clamp frame (230), the second coating area (220) is located in the second clamp frame (240), and the number of the first clamp frames (230) and the second clamp frames (240) are equal and symmetrically arranged.
3. The double-sided coating device for laboratory use according to claim 2, characterized in that: The first coating area (210) and the second coating area (220) have the same size, and the lengths of the first coating area (210) and the second coating area (220) are both smaller than the length of the substrate (500), and the widths of the first coating area (210) and the second coating area (220) are both smaller than the width of the substrate (500).
4. The double-sided coating device for laboratory use according to claim 3, characterized in that: The first clamp frame (230) and the second clamp frame (240) are detachably connected via a first connecting member (250); first connecting holes (260) are provided at four corners of the first clamp frame (230) and the second clamp frame (240); and the first connecting member (250) and the first connecting hole (260) are detachably connected.
5. The double-sided coating device for laboratory use according to claim 4, characterized in that: The length of the substrate (500) is smaller than the distance between two adjacent first connecting members (250) in the length direction, and the width of the substrate (500) is smaller than the distance between two adjacent first connecting members (250) in the width direction.
6. The double-sided coating device for laboratory use according to any one of claims 1 to 5, characterized in that: It also includes a scraper (300) connected to the tank body (100), and two opposite side surfaces of the clamp (200) are arranged in contact with the scraper (300).
7. The double-sided coating device for laboratory use according to claim 6, characterized in that: The scraper (300) comprises a first scraper (310) and a second scraper (320), wherein the first scraper (310) and the second scraper (320) are both movably connected to the tank body (100), and the first scraper (310) and the second scraper (320) are respectively arranged in contact with two opposite side surfaces of the clamp (200).
8. The double-sided coating device for laboratory use according to claim 7, characterized in that: The first scraper (310) and the second scraper (320) are both connected to the trough body (100) via a second connecting member (340); a second connecting hole (330) is provided on the first scraper (310) and the second scraper (320); the second connecting member (340) passes through the second connecting hole (330) to be connected to the trough body (100).
9. The double-sided coating device for laboratory use according to claim 7, characterized in that: The first scraper (310) and the second scraper (320) are respectively connected to the top surfaces of two opposite side walls of the tank body (100), and the clamp (200) is vertically arranged between the first scraper (310) and the second scraper (320).
10. The double-sided coating device for laboratory use according to claim 7, characterized in that: The distance between the first scraper (310) and the second scraper (320) is equal to the total thickness of the clamp (200) and the substrate (500).