Coating mechanism, composite diaphragm processing device, composite diaphragm and electrolytic bath

Abstract

The utility model relates to the technical field of composite diaphragm processing, and particularly discloses a coating mechanism, a composite diaphragm processing device, a composite diaphragm and an electrolytic bath, the coating mechanism comprises a base, a first coating execution assembly and a second coating execution assembly, the first coating execution assembly comprises a first coating piece and a first support which are connected, and the second coating execution assembly comprises a second coating piece and a second support which are connected; the second coating execution assembly comprises a second coating piece and a second support which are connected, an extrusion opening of the first coating piece and an extrusion opening of the second coating piece are arranged face to face in the first direction, and extrusion dynamic pressure of the extrusion opening of the first coating piece and extrusion dynamic pressure of the extrusion opening of the second coating piece are backpressure of each other, so that a base material can be stressed uniformly, and the yield of the base material is improved. And the thickness difference of the functional coatings on the two sides of the base material can be adjusted and controlled by adjusting the coating extrusion flow of the extrusion opening or adjusting the distance between the base material and the first coating piece and the distance between the base material and the second coating piece through the first support and the second support, and the small thickness difference of double-face coating is easily achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of composite diaphragm processing, in particular to a coating mechanism, a composite diaphragm processing device, a composite diaphragm and an electrolytic cell. Background Art

[0002] The role of the composite diaphragm in the alkaline water electrolysis hydrogen production electrolyzer is to separate the cathode and anode to form cathode and anode chambers, prevent short circuits, avoid mixing of gas products at both poles, and have high ionic conductivity, which facilitates the transfer of hydroxide ions from the cathode to the anode. In the related art, the composite diaphragm is generally processed by the pad film method. Specifically, it is necessary to coat the pad film and then composite it with the substrate, and then coat the other surface of the substrate again to form a multilayer structure, and perform liquid phase separation on the multilayer structure. After the pad film and the formed composite diaphragm are peeled and layered, the pad film and the composite diaphragm are respectively wound up and coiled. The production process is relatively complicated and the production cost is high. Due to the obstruction of the pad film, the liquid phase separation cannot be smoothly carried out on one side of the pad film, so that the effective functional coating of the formed composite diaphragm is only a single layer, and the consistency of the thickness of the functional coating on both sides is difficult to control. Utility Model Content

[0003] The purpose of the utility model is to provide a coating mechanism, a composite diaphragm processing device, a composite diaphragm and an electrolytic cell, so as to solve the technical problems in the related art that the alkaline electrolysis water composite diaphragm is processed by a pad film method, the effective functional coating is only a single layer, and the thickness difference of the functional coating on both sides is difficult to control.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] In a first aspect, the present invention provides a coating mechanism, which comprises:

[0006] base;

[0007] A first coating execution assembly includes a first coating member and a first support connected to each other, wherein the first support can selectively slide or be fixed relative to the base along a first direction;

[0008] The second coating execution component includes a second coating member and a second support connected to each other, the second support can selectively slide or be fixed relative to the base along the first direction, the first coating member and the second coating member are arranged face to face in the first direction, and a coating channel is formed between the first coating member and the second coating member, and the coating channel is used for allowing the substrate to pass through.

[0009] In one embodiment, the first coating member and the second coating member can be independent slot die modules, or two slot dies with the same feed channel, as long as they can achieve the function of double-sided coating.

[0010] In one embodiment, the first coating execution assembly further includes a first position-limiting adjustment member, which is disposed on the base and located between the first support and the second support;

[0011] The first position-limiting adjustment member includes a first position-limiting plate and a first adjustment bolt, the first position-limiting plate is connected to the base, the first adjustment bolt is threadedly connected to the first position-limiting plate, and the first adjustment bolt is movable along the first direction and abuts against the first support; and / or the second coating execution assembly further includes a second position-limiting adjustment member, the second position-limiting adjustment member is disposed on the base, and the second position-limiting adjustment member is located between the first support and the second support;

[0012] The second limit adjustment member includes a second limit plate and a second adjustment bolt. The second limit plate is connected to the base. The second adjustment bolt is threadedly connected to the second limit plate. The second adjustment bolt can move along the first direction and abut against the second support.

[0013] In one embodiment, the first coating execution component includes a first screw and a first rotation driving member, the first screw is arranged along the first direction and is rotatably connected to the base, the first support is arranged on the first screw and is transmission-connected to the first screw, the first rotation driving member is arranged on the base and is transmission-connected to the first screw, and the first rotation driving member is capable of driving the first screw to rotate; and / or, the second coating execution component includes a second screw and a second rotation driving member, the second screw is arranged along the first direction and is rotatably connected to the base, the second support is arranged on the second screw and is transmission-connected to the second screw, the second rotation driving member is arranged on the base and is transmission-connected to the second screw, and the second rotation driving member is capable of driving the second screw to rotate.

[0014] In one embodiment, the first coating execution component further includes a first slide rail and a first slider, the first slide rail extends along the first direction and is fixedly connected to the base, the first slider is threadedly connected to the first screw and is slidably connected to the first slide rail, and the first support is provided on the first slider; and / or, the second coating execution component further includes a second slide rail and a second slider, the second slide rail extends along the first direction and is fixedly connected to the base, the second slider is threadedly connected to the second screw and is slidably connected to the second slide rail, and the second support is provided on the second slider.

[0015] In one embodiment, the first coating execution component further includes a first clamping component, which is arranged at the inlet side of the coating channel; and / or the second coating execution component further includes a second clamping component, which is arranged at the outlet side of the coating channel.

[0016] In a second aspect, the present invention further provides a composite diaphragm processing device, comprising:

[0017] The coating mechanism in any of the above schemes;

[0018] The traction mechanism includes a first tension detection component and a second tension detection component. The first tension detection component is arranged at the inlet side of the coating channel, and the second tension detection component is arranged at the outlet side of the coating channel.

[0019] In one embodiment, the conveying direction of the first tension detection assembly and the second tension detection assembly intersects with a horizontal direction, and a minimum angle between the conveying direction and the horizontal direction is in a range of 85°-95°.

[0020] In one embodiment, the first coating member is configured as a first slot die module, the second coating member is configured as a second slot die module, and the lip opening of the first slot die module is equal to the lip opening of the second slot die module.

[0021] In other embodiments, when products with the same or different coating thicknesses are to be produced, the lip openings of the first slot die module and the lip openings of the second slot die module may also be unequal in size, and other parameters may be controlled according to coating requirements.

[0022] In one embodiment, the composite membrane processing device further includes a gas phase separation mechanism and a liquid phase separation mechanism, and the gas phase separation mechanism is arranged between the coating mechanism and the liquid phase separation mechanism.

[0023] In one embodiment, the gas phase separation mechanism comprises:

[0024] a housing, the housing comprising a working chamber, an inlet, and an outlet, the inlet and the outlet being in communication with the working chamber;

[0025] At least two air duct hulls are arranged in the working chamber, and the air duct hulls are used to communicate with an external air source; a plurality of air knives are arranged at intervals on the air duct hull, and the air ducts of the air knives can be selectively connected to or disconnected from the inner cavity of the air duct hull; the air duct hulls are arranged in groups of two, and the air knives on the two air duct hulls in each group are face to face; there is a distance between the air knives of the two air duct hulls in each group to form a gas separation channel, and the gas separation channel is used for the coated substrate to pass through; preferably, the gas separation mechanism also includes a heating element for heating the conveying gas of the air knife.

[0026] It is understood that in other embodiments, other forms of gas phase separation mechanisms may also be provided, such as an array of nozzles for spraying non-solvent vapor within the shell.

[0027] In a third aspect, the present invention further provides a composite diaphragm, which is prepared by the composite diaphragm processing device mentioned above.

[0028] In a fourth aspect, the present invention further provides an electrolytic cell comprising an anode, a cathode and the above-mentioned composite diaphragm.

[0029] The beneficial effects of the utility model are:

[0030] The utility model provides a coating mechanism, a composite diaphragm processing device, a composite diaphragm and an electrolytic cell, wherein the first coating member and the second coating member of the coating mechanism are respectively arranged on both sides of a substrate and extrude coating to coat both sides of the substrate simultaneously, the extrusion dynamic pressure of the extrusion port of the first coating member and the extrusion dynamic pressure of the extrusion port of the second coating member serve as each other's back pressure, which not only makes the substrate bear force evenly and reduces the shaking of the substrate, but also by adjusting the coating extrusion flow rate of the extrusion port of the first coating member and the extrusion port of the second coating member or adjusting the distance between the substrate and the first coating member and the second coating member through the first support and the second support, the thickness difference of the functional coating on both sides of the substrate can be regulated, and the double-sided coating thickness difference can be achieved with a small difference by simple equipment parameter regulation, and the use of cushion film and related equipment can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of a coating mechanism in an embodiment of the present utility model;

[0032] Figure 2 This is a schematic structural diagram of the first clamping assembly and the second clamping assembly in an embodiment of the present utility model;

[0033] Figure 3 Schematic diagram of a cross section of the first and second nip rollers clamping the substrate in an embodiment of the present invention;

[0034] Figure 4This is a schematic cross-sectional view of the third and fourth nip rollers clamping the substrate coated with the functional coating in an embodiment of the present invention;

[0035] Figure 5 It is a schematic diagram of the overall structure of the composite diaphragm processing device in an embodiment of the present utility model.

[0036] In the figure: 1, coating mechanism; 100, base;

[0037] 110, first coating member; 111, first support; 112, first position-limiting adjustment member; 1121, first position-limiting plate; 1122, first adjustment bolt; 113, first lead screw; 114, first rotation driving member; 115, first slide rail; 116, first slider;

[0038] 120, second coating member; 121, second support; 122, second position-limiting adjustment member; 1221, second position-limiting plate; 1222, second adjustment bolt; 123, second lead screw; 124, second rotation driving member; 125, second slide rail; 126, second slider;

[0039] 130, first clamping assembly; 131, first clamping roller; 132, second clamping roller; 133, first swinging member; 134, first swinging driving member; 135, second swinging member; 136, second swinging driving member;

[0040] 140. Second clamping assembly; 141. Third clamping roller; 142. Fourth clamping roller; 143. Third swinging member; 144. Third swinging driving member; 145. Fourth swinging member; 146. Fourth swinging driving member;

[0041] 151. Clamping portion; 152. Avoidance groove; 153. Base;

[0042] 2. Traction mechanism; 211. First tension detection assembly; 212. Second tension detection assembly;

[0043] 221, first driving roller; 222, first rotating roller driving member; 223, first pressure roller; 224, first guide roller; 231, third tension detection assembly; 232, second driving roller; 233, second rotating roller driving member; 234, second pressure roller; 235, second guide roller;

[0044] 3. Gas phase separation mechanism; 31. Shell; 32. Air duct hull; 33. Air knife; 34. Heating element;

[0045] 4. Liquid phase separation mechanism; 41. Box body; 42. Third guide roller; 5. Substrate. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0047] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0048] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0050] like Figures 1 to 2 As shown, the X direction shown in the figure is a schematic diagram of the first direction, and the Y direction is a schematic diagram of the second direction. An embodiment of the first aspect of the present utility model provides a coating mechanism 1, which includes a base 100, a first coating execution component and a second coating execution component. The first coating execution component includes a first coating member 110 and a first support 111 connected to each other. The first support 111 can selectively slide or be fixed relative to the base 100 along the first direction, that is, the first coating member 110 can be extended along the first direction and is slidably connected to the base 100 through the first support 111.

[0051] The second coating execution assembly includes a second coating member 120 and a second support 121 connected thereto. The second support 121 can selectively slide or be fixed relative to the base 100 along a first direction. That is, the second coating member 120 can extend along the first direction and is slidably connected to the base 100 via the second support 121. The first support 111 and the second support 121 can move closer to or farther from each other along the first direction, thereby driving the first coating member 110 and the second coating member 120 to move closer to or farther from each other in the first direction. The extrusion ports of the first coating member 110 and the second coating member 120 are arranged face to face in the first direction, forming a coating channel between the first coating member 110 and the second coating member 120, and the coating channel is used for the substrate 5 to pass through.

[0052] In this way, when the substrate 5 is mounted in the coating channel between the first coating member 110 and the second coating member 120, the first coating member 110 and the second coating member 120 are respectively arranged on both sides of the substrate 5 and extrude the coating to coat both sides of the substrate 5 simultaneously. The extrusion dynamic pressure of the extrusion port of the first coating member 110 and the extrusion dynamic pressure of the extrusion port of the second coating member 120 are mutually back pressure, which can make the substrate 5 evenly stressed and reduce the shaking of the substrate 5. By adjusting the coating extrusion flow rate of the extrusion port of the first coating member 110 and the extrusion port of the second coating member 120 or adjusting the coating flow rate of the first support 111 and the second support 121 The distance between the substrate 5 and the first coating member 110 and the second coating member 120 can be used to regulate the thickness difference of the functional coating on both sides of the substrate 5. For example, by keeping the coating extrusion flow of the first coating member 110 and the second coating member 120 consistent, and the distance between the first coating member 110 and the substrate 5 and the distance between the second coating member 120 and the substrate 5 consistent, the thickness of the functional coating on both sides of the substrate 5 can be kept consistent, which is beneficial to reducing the thickness difference. The thickness difference can be reduced to within 0.5 microns. The double-sided coating thickness difference can be smaller through simple equipment parameter control, and the use of pad film and related equipment can be saved.

[0053] If there is a need to coat functional coatings of different thicknesses on both sides of the substrate 5, the distance between the first coating part 110 and the substrate 5 and the distance between the second coating part 120 and the substrate 5 can be kept consistent. The thickness difference of the functional layer on both sides of the substrate 5 can be regulated by making the coating extrusion flow of the first coating part 110 greater than the coating extrusion flow of the second coating part 120, or by making the coating extrusion flow of the first coating part 110 less than the coating extrusion flow of the second coating part 120. Of course, in other embodiments, the thickness difference on both sides can also be regulated by setting the same extrusion flow and different spacing between the coating part and the substrate. The coating mechanism setting of the present application makes it easy to regulate the thickness difference of the functional coating, reduces the use of padding, and solves the technical problem in the related art that the alkaline electrolysis water composite diaphragm is processed by the padding method, the effective functional coating is only a single layer, and the thickness difference of the functional coating on both sides is difficult to control.

[0054] It should be noted that the extrusion opening of the first coating member 110 and the extrusion opening of the second coating member 120 are arranged face to face in the first direction, which means that the extrusion opening of the first coating member 110 and the extrusion opening of the second coating member 120 are facing each other, and the extrusion opening of the first coating member 110 and the extrusion opening of the second coating member 120 are aligned with each other. The distance between the extrusion opening of the first coating member 110 and the extrusion opening of the second coating member 120 and the surface of the substrate 5, the height in the longitudinal direction of the substrate 5, and the position in the width direction of the substrate 5 are all the same. The substrate 5 can be, but is not limited to, a fabric or a film, such as a mesh, and the thickness of the substrate 5 can be, but is not limited to, 2 microns to 2000 microns.

[0055] Optionally, the base 100 can be an integrally molded structure, and the material can be cast iron, which has a stable structure. During equipment, processing, installation, debugging and subsequent production, it can improve the consistency of the installation reference surface of the first coating part 110 and the second coating part 120, and improve the alignment accuracy of the first coating part 110 and the second coating part 120.

[0056] like Figures 1 to 2 As shown, in some embodiments, the first coating execution component also includes a first limit adjustment member 112, which is arranged on the base 100, and the first limit adjustment member 112 is located between the first support 111 and the second support 121. The first limit adjustment member 112 can abut against the first support 111 to position the movement limit position of the first support 111, thereby positioning the coating extrusion position of the first coating member 110.

[0057] Among them, the first limit adjustment member 112 includes a first limit plate 1121 and a first adjusting bolt 1122. The first limit plate 1121 is connected to the base 100, and the first adjusting bolt 1122 is threadedly connected to the first limit plate 1121. The first adjusting bolt 1122 can move along the first direction and abut against the first support 111. When in use, the first adjusting bolt 1122 can move relative to the first limit plate 1121 in the first direction through the connecting thread under the action of external force, so as to abut the first support 111 at different positions in the first direction. The first support 111 drives the first coating member 110 to stop at different extreme positions, which is convenient for adjusting and limiting the coating extrusion position of the first coating member 110, and improving the positioning between the first coating member 110 and the substrate 5 and between the first coating member 110 and the second coating member 120.

[0058] like Figures 1 to 2As shown, in some embodiments, the second coating execution assembly further includes a second limit adjustment member 122. The second limit adjustment member 122 is disposed on the base 100 and is located between the first support 111 and the second support 121. The second limit adjustment member 122 can abut against the second support 121 to position the second support 121 at its limit of movement, thereby positioning the coating extrusion position of the second coating member 120. Either the first limit adjustment member 112 or the second limit adjustment member 122 can be provided, or both can be provided.

[0059] Among them, the second limit adjustment member 122 includes a second limit plate 1221 and a second adjusting bolt 1222. The second limit plate 1221 is connected to the base 100. The second adjusting bolt 1222 is threadedly connected to the second limit plate 1221. The second adjusting bolt 1222 can move along the first direction and abut against the second support 121. When in use, the second adjusting bolt 1222 can move relative to the second limit plate 1221 in the first direction through the connecting thread under the action of external force, so as to abut the second support 121 at different positions in the first direction. The second support 121 drives the second coating member 120 to stop at different extreme positions, which is convenient for adjusting and limiting the coating extrusion position of the second coating member 120, and improving the positioning between the second coating member 120 and the substrate 5 and between the second coating member 120 and the first coating member 110.

[0060] like Figures 1 to 2 As shown, in some embodiments, the first coating execution component includes a first screw 113 and a first rotating drive member 114, the first screw 113 is arranged along the first direction and is rotatably connected to the base 100, the first support 111 is arranged on the first screw 113 and is transmission-connected to the first screw 113, the first rotating drive member 114 is arranged on the base 100 and is transmission-connected to the first screw 113, and the first rotating drive member 114 can drive the first screw 113 to rotate.

[0061] When in use, the first rotating drive member 114 is connected to the base 100 and can be supported by the base 100. The first rotating drive member 114 drives the first screw 113 to rotate, thereby driving the first support 111 to move in the first direction through the connecting thread on the first screw 113. The threaded connection movement feed adjustment accuracy is high and it is easy to lock after stopping, thereby improving the control accuracy of the moving position of the first support 111 and the first coating member 110, thereby making the spacing positioning position between the extrusion port of the first coating member 110 and the surface of the substrate 5 more accurate, which is convenient for controlling the coating thickness of the functional coating on the side of the substrate 5 close to the first coating member 110.

[0062] like Figures 1 to 2As shown, the second coating execution component includes a second screw 123 and a second rotating drive member 124. The second screw 123 is arranged along the first direction and is rotatably connected to the base 100. The second support 121 is arranged on the second screw 123 and is transmission-connected to the second screw 123. The second rotating drive member 124 is arranged on the base 100 and is transmission-connected to the second screw 123. The second rotating drive member 124 can drive the second screw 123 to rotate.

[0063] When in use, the second rotating drive member 124 is connected to the base 100 and can be supported by the base 100. The second rotating drive member 124 drives the second screw 123 to rotate, thereby driving the second support 121 to move in the first direction through the connecting thread on the second screw 123. The threaded connection movement feed adjustment accuracy is high and it is easy to lock after stopping, thereby improving the control accuracy of the moving position of the second support 121 and the second coating member 120, thereby making the spacing positioning position between the extrusion port of the second coating member 120 and the surface of the substrate 5 more accurate, which is convenient for controlling the coating thickness of the functional coating on the side of the substrate 5 close to the second coating member 120.

[0064] In this embodiment, the first rotating drive member 114 and the second rotating drive member 124 can be, but are not limited to, motors, rotating cylinders, or rotating hydraulic cylinders, and can drive the first screw 113 and the second screw 123 to rotate or stop. The first screw 113 and the first rotating drive member 114 as well as the second screw 123 and the second rotating drive member 124 can be provided at the same time, or one group thereof can be provided, that is, the first coating member 110 and the second coating member 120 can be driven together or unilaterally. Among them, the first support 111 and the second support 121 can be provided with at least two commonly used working positions, such as a production working position close to the substrate 5, and a standby position away from the substrate 5. The first rotating drive member 114 and the second rotating drive member 124 can accurately and quantitatively adjust the distance between the first coating member 110 and the second coating member 120 and the substrate 5.

[0065] like Figures 1 to 2 As shown, in some embodiments, the first coating execution component also includes a first slide rail 115 and a first slider 116. The first slide rail 115 extends along the first direction and is fixedly connected to the base 100. The first slider 116 is threadedly connected to the first screw 113 and is slidably connected to the first slide rail 115. The first support 111 is set on the first slider 116, and the two can be fixedly connected and move together.

[0066] With such arrangement, the first rotating driving member 114 drives the first lead screw 113 to rotate, and the first lead screw 113 drives the first slider 116 to slide along the first slide rail 115 in the first direction through the connecting thread. The first slide rail 115 can guide the first slider 116 to reduce the movement deviation of the first slider 116 in the vertical direction of the first direction. The first slider 116 drives the first support 111 and the first coating member 110 to slide along the first slide rail 115, which can reduce the movement deviation of the first coating member 110 in the vertical direction of the first direction, improve the alignment accuracy of the first coating member 110 and the second coating member 120, and thereby reduce the force shaking of the substrate 5, which is convenient for regulating the thickness difference of the functional coating on both sides of the substrate 5.

[0067] like Figures 1 to 2 As shown, in some embodiments, the second coating execution component also includes a second slide rail 125 and a second slider 126. The second slide rail 125 extends along the first direction and is fixedly connected to the base 100. The second slider 126 is threadedly connected to the second screw 123 and is slidably connected to the second slide rail 125. The second support 121 is set on the second slider 126, and the two can be fixedly connected and move together. The second rotating driving member 124 can drive the second lead screw 123 to rotate, and the second lead screw 123 drives the second slider 126 to slide along the second slide rail 125 in the first direction through the connecting thread. The second slide rail 125 can guide the second slider 126 to reduce the movement offset of the second slider 126 in the vertical direction of the first direction. The second slider 126 drives the second support 121 and the second coating member 120 to slide along the second slide rail 125, which can reduce the movement offset of the second coating member 120 in the vertical direction of the first direction, improve the rotation accuracy between the second coating member 120 and the first coating member 110, and thereby reduce the force shaking of the substrate 5, which is convenient for regulating the thickness difference of the functional coating on both sides of the substrate 5.

[0068] The first slide rail 115 and the first slider 116 as well as the second slide rail 125 and the second slider 126 can be provided at the same time, or only one set can be provided, and can be installed according to actual use needs and layout space.

[0069] like Figures 3 to 5As shown, in some embodiments, the coating mechanism 1 further includes a clamping mechanism, which is provided on the conveying path of the substrate 5. The clamping mechanism is used to clamp the substrate 5 so as to limit the position of the substrate 5 in the first direction during the coating and conveying process. One or more clamping mechanisms may be provided, and the clamping mechanism can clamp the substrate 5 on the conveying path of the substrate 5. This not only limits the movement of the substrate 5 in the first direction and reduces the shaking of the substrate 5, but also shortens the overhead distance and reduces the tension fluctuation of the substrate 5, thereby ensuring the flatness of the substrate 5 during operation, reducing the scratches with the coating parts, and improving the coating quality, so that the first coating part 110 and the second coating part 120 can be coated face to face on both sides to achieve stable production.

[0070] like Figures 3 to 5 As shown, in some embodiments, the clamping mechanism includes a first clamping assembly 130 and / or a second clamping assembly 140, the first clamping assembly 130 being disposed at the inlet side of the coating channel, and the second clamping assembly 140 being disposed at the outlet side of the coating channel, that is, the coating mechanism may be provided with the first clamping assembly 130 only at the inlet side of the coating channel, the first clamping assembly 130 clamping the substrate 5 at the inlet side of the coating channel, reducing the feeding tension fluctuation of the substrate 5 at the inlet side of the coating channel, and maintaining the accuracy of the feeding and conveying position of the substrate 5. Alternatively, the coating mechanism may also be provided with the second clamping assembly 140 only at the outlet side of the coating channel, the second clamping assembly 140 clamping the substrate 5 at the outlet side of the coating channel, reducing the extrusion tension fluctuation of the substrate 5 at the outlet side of the coating channel, and reducing the shaking and positional deviation of the substrate 5 at the extrusion and conveying position.

[0071] Alternatively, the first clamping assembly 130 and the second clamping assembly 140 can be provided together, and the two can cooperate with each other to clamp the substrate 5 on the inlet and outlet sides of the coating channel, and can tension and set up the substrate 5 located in the coating channel, so that the relative position of the substrate 5 located in the coating channel and the first coating part 110 and the second coating part 120 is more stable, reducing shaking and tension fluctuations, maintaining the flatness of the substrate 5 in the coating section, making the coating of the substrate 5 by the first coating part 110 and the second coating part 120 more uniform, reducing tension fluctuations of the substrate 5, ensuring the controllability of the coating thickness of the functional coating, and also reducing the situation where the substrate 5 is locally scratched by the first coating part 110 or the second coating part 120 due to twisting, deformation or wrinkles, avoiding the scrapping of the substrate 5, improving the coating quality, and making the face-to-face double-sided coating of the first coating part 110 and the second coating part 120 more stable.

[0072] The first clamping assembly 130 and the second clamping assembly 140 can be, but are not limited to, mechanical grippers, rollers, chain clamps, or conveyor belts. For example, a conveyor belt can extend along the conveying direction of the substrate 5, and the conveying speed of the conveyor belt can be equal to the conveying speed of the substrate 5. The conveyor belt can contact the surface of the substrate 5 and exert a supporting force on the substrate 5. The second clamping assembly 140 can clamp the portion of the substrate 5 not coated with the functional coating, thereby reducing the shaking of the substrate 5 and avoiding the portion of the substrate 5 coated with the functional coating.

[0073] like Figures 2 to 4 As shown, optionally, the first clamping assembly 130 includes a first clamping roller 131 and a second clamping roller 132. The first clamping roller 131 and the second clamping roller 132 can move closer to or farther away from each other in a first direction. When the first clamping roller 131 and the second clamping roller 132 move closer to each other, they can contact and clamp the substrate 5. When the first clamping roller 131 and the second clamping roller 132 move farther away from each other, the substrate 5 can be released for easy removal. The first clamping roller 131 and the second clamping roller 132 can also adjust the clamping distance according to substrates 5 of different thicknesses.

[0074] The second clamping assembly 140 includes a third clamping roller 141 and a fourth clamping roller 142. The third clamping roller 141 and the fourth clamping roller 142 can move toward or away from each other in the first direction. Similarly, when the third clamping roller 141 and the fourth clamping roller 142 move toward each other, they can contact and clamp the substrate 5. When the third clamping roller 141 and the fourth clamping roller 142 move away from each other, the substrate 5 can be released for easy removal. The third clamping roller 141 and the fourth clamping roller 142 can also adjust the clamping distance according to substrates 5 of different thicknesses.

[0075] In this arrangement, the first clamping assembly 130 clamps the front end of the substrate 5 through the first clamping roller 131 and the second clamping roller 132, and the second clamping assembly 140 clamps the rear end of the substrate 5 through the third clamping roller 141 and the fourth clamping roller 142, so that the substrate 5 is always positioned in the middle of the coating channel to ensure the symmetry and consistency of double-sided coating. At the same time, because the substrate 5 is clamped by the first clamping assembly 130 and the second clamping assembly 140, the overhead distance is greatly shortened, thereby ensuring the flatness of the substrate 5 during operation, improving the coating quality, and enabling stable production of face-to-face double-sided coating of the first coating part 110 and the second coating part 120.

[0076] like Figures 2 to 4As shown, in some embodiments, at least one of the third nip roller 141 and the fourth nip roller 142 includes a clamping portion 151 and an avoidance groove 152. The clamping portion 151 is provided at both ends of the avoidance groove 152. The clamping portion 151 is used to clamp the edge portion of the substrate 5 not coated with the functional coating, and the avoidance groove 152 is used to avoid the coated portion of the substrate 5 coated with the functional coating. The avoidance groove 152 can be configured as an annular groove, which is provided circumferentially around the third nip roller 141 or the fourth nip roller 142. The width of the annular groove is equal to or greater than the width of the functional coating. The clamping portion 151 of the third nip roller 141 and the clamping portion 151 of the fourth nip roller 142 can approach each other to clamp the edge portion of the substrate 5 not coated with the functional coating, making the substrate 5 in the coating channel more flat and reducing shaking.

[0077] Optionally, the surfaces of the third clamping roller 141 and the fourth clamping roller 142 may be provided with a clamping portion 151 and an avoidance groove 152. The clamping portion 151 of the third clamping roller 141 corresponds to the clamping portion 151 of the fourth clamping roller 142, and the avoidance groove 152 of the third clamping roller 141 corresponds to the avoidance groove 152 of the fourth clamping roller 142, which can provide a larger conveying space for the functional coating.

[0078] like Figures 2 to 4 As shown, in some embodiments, the first clamping assembly 130 further includes a first swinging member 133 and a first swing driving member 134. One end of the first swinging member 133 is rotatably connected to the first clamping roller 131, and the other end is rotatably connected to the first coating member 110. The first swinging member 133 can support both ends of the first clamping roller 131. The first swing driving member 134 has a driving end and a connecting end. The driving end of the first swing driving member 134 is rotatably connected to the first swinging member 133, and the connecting end of the first swing driving member 134 is rotatably connected to the first coating member 110. The first swing driving member 134 can drive the first swinging member 133 and the first clamping roller 131 to swing, thereby driving the first clamping roller 131 to change position along the first direction.

[0079] The first clamping assembly 130 also includes a second swinging member 135 and a second swinging driving member 136. One end of the second swinging member 135 is rotatably connected to the second clamping roller 132, and the other end is rotatably connected to the second coating member 120. The second swinging driving member 136 has a driving end and a connecting end. The driving end of the second swinging driving member 136 is rotatably connected to the second swinging member 135, and the connecting end of the second swinging driving member 136 is rotatably connected to the second coating member 120. The second swinging driving member 136 can drive the second swinging member 135 and the second clamping roller 132 to swing, so as to drive the second clamping roller 132 to change its position along the first direction.

[0080] In this embodiment, the first swing member 133 and the second swing member 135 may be, but are not limited to, rod-shaped, plate-shaped, or frame-shaped structures. The first swing driving member 134 may be connected to the middle portion of the first swing member 133 or a position near the first pinch roller 131, facilitating flexible rotation of the first swing member 133 and the first pinch roller 131, and maintaining pressure on the substrate 5 via the first pinch roller 131. The second swing driving member 136 may be connected to the middle portion of the second swing member 135 or a position near the second pinch roller 132, facilitating flexible rotation of the second swing member 135 and the second pinch roller 132, and maintaining pressure on the substrate 5 via the second pinch roller 132. The first swing driving member 134 and the second swing driving member 136 may be, but are not limited to, pneumatic cylinders, hydraulic cylinders, or electric telescopic rods. When the third swing driving member 144 and the fourth swing driving member 146 are configured as pneumatic cylinders or hydraulic cylinders, their control pressures may be adjusted by providing precision pressure regulating valves.

[0081] like Figures 2 to 4 As shown, in some embodiments, the second clamping assembly 140 also includes a third swinging member 143 and a third swinging driving member 144, one end of the third swinging member 143 is rotatably connected to the third clamping roller 141, and the other end is rotatably connected to the first coating member 110, the third swinging driving member 144 has a driving end and a connecting end, the driving end of the third swinging driving member 144 is rotatably connected to the third swinging member 143, and the connecting end of the third swinging driving member 144 is rotatably connected to the first coating member 110, and the third swinging driving member 144 can drive the third swinging member 143 and the third clamping roller 141 to swing, so as to drive the third clamping roller 141 to change its position along the first direction.

[0082] The second clamping assembly 140 also includes a fourth swinging member 145 and a fourth swinging driving member 146. One end of the fourth swinging member 145 is rotatably connected to the fourth clamping roller 142, and the other end is rotatably connected to the second coating member 120. The fourth swinging driving member 146 has a driving end and a connecting end. The driving end of the fourth swinging driving member 146 is rotatably connected to the fourth swinging member 145, and the connecting end of the fourth swinging driving member 146 is rotatably connected to the second coating member 120. The fourth swinging driving member 146 can drive the fourth swinging member 145 and the fourth clamping roller 142 to swing, so as to drive the fourth clamping roller 142 to change its position along the first direction.

[0083] In this embodiment, the third swing member 143 and the fourth swing member 145 may be, but are not limited to, rod-shaped, plate-shaped, or frame-shaped structures. The third swing driving member 144 may be connected to the middle portion of the third swing member 143 or a position close to the third pinch roller 141, so as to flexibly drive the third swing member 143 and the third pinch roller 141 to rotate and maintain the third pinch roller 141 against the substrate 5. The fourth swing driving member 146 may be connected to the middle portion of the fourth swing member 145 or a position close to the fourth pinch roller 142, so as to flexibly drive the fourth swing member 145 and the fourth pinch roller 142 to rotate and maintain the fourth pinch roller 142 against the substrate 5. The third swing driving member 144 and the fourth swing driving member 146 may be, but are not limited to, pneumatic cylinders, hydraulic cylinders, or electric telescopic rods. When the third swing driving member 144 and the fourth swing driving member 146 are configured as pneumatic cylinders or hydraulic cylinders, their control pressures may be adjusted by providing a precision pressure regulating valve.

[0084] The first coating member 110 and the second coating member 120 may each be provided with a plurality of bases 153. The plurality of bases 153 may protrude from the surfaces of the first coating member 110 and the second coating member 120 and extend along a second direction intersecting the first direction. For example, the second direction may be configured as a vertical direction. The first swing driving member 134, the second swing driving member 136, the third swing driving member 144, and the fourth swing driving member 146 may each extend along the first direction. The plurality of bases 153 may provide rotational support for the first swing driving member 134, the second swing driving member 136, the third swing driving member 144, and the fourth swing driving member 146.

[0085] like Figures 2 to 4 As shown, in some embodiments, the end surfaces of the first coating member 110 and the second coating member 120, where the extrusion outlet is provided, are tapered, and the first clamping assembly 130 and the second clamping assembly 140 are disposed on the tapered surfaces to maintain a relatively small distance between the first clamping assembly 130 and the second clamping assembly 140, further reducing the stability of the substrate 5 at the coating end within the coating channel, reducing shaking, and improving coating accuracy. Alternatively, the first clamping assembly 130 and the second clamping assembly 140 are disposed on the circumferential sidewalls of the first coating member 110 and the second coating member 120 to provide sufficient installation space for the first clamping assembly 130 and the second clamping assembly 140, thereby increasing the swing amplitude of the first clamping assembly 130 and the second clamping assembly 140.

[0086] like Figures 2 to 4As shown, the radial dimension TO of the first coating member 110 and the second coating member 120 may be equal to or less than 10 cm, the first pinch roller 131 and the second pinch roller 132 are at the same position on the first coating member 110 and the second coating member 120 in the first direction, and the distance D2 between the first pinch roller 131 and the second pinch roller 132 and the surface of the first coating member 110 or the second coating member 120 may be equal to or less than 30 cm. Similarly, the third pinch roller 141 and the fourth pinch roller 142 are at the same position on the first coating member 110 and the second coating member 120 in the first direction, and the distance D1 between the third pinch roller 141 and the fourth pinch roller 142 and the surface of the first coating member 110 or the second coating member 120 may be equal to or less than 30 cm. The distance S1 between the first clamping roller 131 and the second clamping roller 132 and the extrusion outlets of the first coating member 110 and the second coating member 120 can be taken as the minimum value while meeting the installation requirements of the first clamping assembly 130, and the distance S2 between the third clamping roller 141 and the fourth clamping roller 142 and the extrusion outlets of the first coating member 110 and the second coating member 120 can be taken as the minimum value while meeting the installation requirements of the second clamping assembly 140.

[0087] like Figure 5 As shown, an embodiment of the second aspect of the present invention provides a composite diaphragm processing device, which includes the coating mechanism 1 and the traction mechanism 2 in the above-mentioned scheme. The traction mechanism 2 includes a first tension detection component 211 and a second tension detection component 212. The first tension detection component 211 is arranged on the inlet side of the coating channel, and the second tension detection component 212 is arranged on the outlet side of the coating channel. The first tension detection component 211 and the second tension detection component 212 can set up the substrate 5 at the position where the coating mechanism 1 is located, and perform real-time detection of the tape tension of the substrate 5 in the section where the coating mechanism 1 is located, so as to facilitate coating of the substrate 5 under preset tension conditions and reduce the influence of deformation or wrinkles of the substrate 5 on the coating effect.

[0088] When the substrate 5 is installed in the coating channel between the first coating member 110 and the second coating member 120 through the first tension detection component 211 and the second tension detection component 212, the first coating member 110 and the second coating member 120 are respectively arranged on both sides of the substrate 5 and extrude the coating to coat both sides of the substrate 5 simultaneously. The extrusion dynamic pressure of the extrusion port of the first coating member 110 and the extrusion dynamic pressure of the extrusion port of the second coating member 120 serve as each other's back pressure, which not only makes the substrate 5 evenly stressed and reduces the shaking of the substrate 5, but also can adjust the thickness difference of the functional coating on both sides of the substrate 5 by adjusting the coating extrusion flow rate of the extrusion port of the first coating member 110 and the extrusion port of the second coating member 120. The thickness difference is easy to control and the use of cushion film is reduced.

[0089] In this embodiment, the first coating member 110 and the second coating member 120 can be, but are not limited to, a slot die or a gravure roller. Optionally, the first coating member 110 and the second coating member 120 can be configured as a slot die. The slot die can be operated while the substrate 5 is being transported at high speed. By adjusting the opening width and position of the slot die, a uniform coating of the desired thickness and width can be formed on the substrate 5. The coating can also be adapted to coating solutions of different viscosities, thereby reducing coating defects and coating solution waste during the coating process. The first coating member 110 and the second coating member 120 can be independent slot die modules or two slot dies with the same feed channel, as long as they can achieve the function of double-sided coating.

[0090] Optionally, the first coating member 110 and the second coating member 120 may be configured as gravure rollers, which can perform uniform thin layer coating on both sides of the substrate 5 with high coating accuracy.

[0091] In addition, the first tension detection component 211 and the second tension detection component 212 may include a separately arranged tension detection roller for the substrate 5 to be wound around, so as to perform tension detection on the substrate 5, or optionally, the first tension detection component 211 and the second tension detection component 212 may also include multiple tension detection rollers, and the multiple tension detection rollers may be arranged in parallel. The substrate 5 can be wound around the multiple tension detection rollers respectively, and the tension detection is performed jointly by the multiple tension detection rollers.

[0092] like Figure 5 As shown, in some embodiments, the conveying direction of the first tension detection component 211 and the second tension detection component 212 intersects with the horizontal direction, and the angle between the conveying direction and the horizontal direction is a, and the minimum angle range of a is 85°-95°, that is, the conveying direction of the first tension detection component 211 and the second tension detection component 212 can be extended along the vertical direction, and the substrate 5 is erected along the conveying direction of the first tension detection component 211 and the second tension detection component 212. After the first coating member 110 and the second coating member 120 apply the paint to both sides of the substrate 5, the paint can be leveled under the action of its own gravity, so as to improve the flatness of the functional coating after coating the surface of the substrate 5.

[0093] It should be noted here that the substrate 5 is tensioned and suspended in the coating channel by the first tension detection component 211 and the second tension detection component 212, and the direction of the conveying connection line between the output position of the first tension detection component 211 and the input position of the second tension detection component 212 can be the conveying direction of the substrate 5 between the first tension detection component 211 and the second tension detection component 212.

[0094] In addition, the first direction can be configured as a horizontal direction, or the first direction can also be other directions having a preset angle with the horizontal direction. For example, the preset angle can be but is not limited to ±5°. It can be understood that the preset angle can also be greater than ±5°, as long as the coating work can be carried out normally.

[0095] Optionally, the angle a between the conveying direction of the first tension detection component 211 and the second tension detection component 212 and the horizontal direction can be selected in the range of 88°-92°, while ensuring the leveling effect of the paint coating, reducing the alignment requirement for the output of the first tension detection component 211 to be located at the input position of the second tension detection component 212.

[0096] Optionally, the angle a between the conveying direction of the first tension detection component 211 and the second tension detection component 212 and the horizontal direction can be selected to range from 89.5° to 90.5°, further improving the leveling effect of the coating on the surface of the substrate 5 and the flatness of the functional coating.

[0097] like Figure 2 and Figure 5 As shown, in some embodiments, the first coating member 110 is configured as a first slot die module, and the second coating member 120 is configured as a second slot die module. The die lip opening of the first slot die module is equal to the die lip opening of the second slot die module, which is convenient for reducing variables. By adjusting the average flow rate of the coating at the extrusion port of the first coating member 110 and the extrusion port of the second coating member 120, the coating extrusion flow rate of the first coating member 110 and the second coating member 120 can be controlled, thereby ensuring that the thickness of the functional coating on both sides of the substrate 5 is the same or has a specific thickness difference, and the control is convenient.

[0098] In other embodiments, when products with the same or different coating thicknesses are to be produced, the sizes of the die lip openings of the first slot die module and the second slot die module may also be unequal, and other parameters may be controlled according to coating requirements.

[0099] Optionally, the distance between the extrusion port of the first coating member 110 and the conveying line is equal to the distance between the extrusion port of the second coating member 120 and the conveying line, so that the coating extruded from the extrusion port of the first coating member 110 and the coating extruded from the extrusion port of the second coating member 120 can be extruded at the same height position of the substrate 5, reducing the extrusion position deviation, making the force on both sides of the substrate 5 uniform, and reducing the force torque on the substrate 5.

[0100] like Figure 5As shown, in some embodiments, the composite diaphragm processing device further includes a gas phase separation mechanism 3 and a liquid phase separation mechanism 4. The gas phase separation mechanism 3 is arranged between the coating mechanism 1 and the liquid phase separation mechanism 4, and the second tension detection component 212 is arranged in the liquid phase separation mechanism 4. The first tension detection component 211 and the second tension detection component 212 suspend the substrate 5 on the coating mechanism 1, the gas phase separation mechanism 3 and the liquid phase separation mechanism 4. After the substrate 5 is sprayed with the functional coating by the first coating member 110 and the second coating member 120 of the coating mechanism 1, it can directly enter the gas phase separation mechanism 3 to heat and perform gas phase separation on the functional coating, so that the functional coating is solidified and the gas is discharged, thereby improving the bubble point of the functional coating and also improving the strength of the functional coating. For example, the bubble point of the improved functional coating can be increased by 40%, and the strength of the functional coating can be increased by 20%. Then, the substrate 5 is transported to the liquid phase separation mechanism 4, so that the functional coatings on both sides of the substrate 5 are fully in contact with liquids such as water at the same time, which can further solidify the functional coating and complete the processing of the functional coating. In subsequent use, the functional coatings on both sides of the substrate 5 have corresponding functions.

[0101] like Figure 5 As shown, in some embodiments, the gas phase separation mechanism 3 includes a housing 31, at least two air duct hulls 32, and a heating element 34. The housing 31 has a working chamber, an inlet, and an outlet, which are connected to the working chamber. The housing 31 is a sealed shell structure. The dimensions of the inlet and outlet can be slightly larger than the dimensions of the substrate 5, and can only be sufficient to allow the substrate 5 to pass through. The internal working chamber of the housing 31 can be separated from the external environment into two independent air fields, thereby reducing the impact of the external environment on the gas phase separation environment in the working chamber. The air duct hull 32 is disposed within the working chamber and is used to connect to an external air source. The air duct hull 32 can store and transport gas. Multiple air knives 33 are spaced apart on the air duct hull 32. The air ducts of the air knives 33 can be selectively connected or disconnected with the internal chamber of the air duct hull 32. For example, an on / off valve can be provided at the air outlet of the air duct hull 32, at the location of the air knives 33, or in the air duct between the air duct hull 32 and the air knives 33, and the on / off amplitude can be controlled manually or electronically.

[0102] The air duct vessels 32 are arranged in pairs, with the air blades 33 on the two air duct vessels 32 in each group facing each other in a first direction. Optionally, the air blades 33 on the two air duct vessels 32 in each group are symmetrically arranged about the conveying line. A gap exists between the air blades 33 of the two air duct vessels 32 in each group to form a gas separation channel for the coated substrate 5 to pass through. A heating element 34 is used to heat the conveying gas of the air blades 33. The heating element 34 can be arranged on the air duct vessels 32, on the air blades 33, or between the air duct vessels 32 and the air blades 33, as long as it can heat the conveying gas of the air blades 33.

[0103] In this configuration, when the substrate 5 coated with the functional coating is installed in the gas phase separation channel through the first tension detection component 211 and the second tension detection component 212, the air duct hull 32 is arranged on both sides of the substrate 5. The air duct hull 32 is connected to the air knife 33. The air knife 33 sprays the heated hot gas to the substrate 5, blowing the hot gas on the functional coating. In addition, multiple air knives 33 can be set on both sides of the conveying line. The air knives 33 can apply the same spray force to the substrate 5. The same force is applied to both sides of the substrate 5 to reduce shaking. The air blown by the air knife 33 can suspend the substrate 5 in the gas phase separation channel, reducing damage to the functional coating. In this embodiment, the air output of the air knife 33 on both sides of the substrate 5 can be adjusted so that the dynamic pressure of the wind on both sides of the substrate 5 is equal in magnitude and opposite in direction, so that the substrate 5 is always in the middle position during the continuous conveying process, reducing the scratches with the air knives 33 on both sides of the substrate 5.

[0104] In this embodiment, an air duct may be provided between the air duct hull 32 and the air knife 33 or on the air knife 33. The air outlet of the air duct may be a slit parallel to the surface of the substrate 5, or a mesh air outlet or other forms of air outlet.

[0105] It is understandable that the gas phase separation mechanism 3 may also be provided with other forms of gas phase separation mechanisms, such as nozzles for spraying non-solvent vapor arranged in an array within the shell.

[0106] Optionally, the gas phase separation mechanism 3 further includes a gas concentration sensor for detecting the solvent gas concentration in the working chamber. The solvent gas concentration can reflect the gas phase separation effect of the functional coating. The gas concentration sensor can be disposed on the inner wall of the working chamber, the outer wall of the air duct hull 32, or the outer wall of the air knife 33, and can detect the solvent gas concentration.

[0107] Optionally, the gas phase separation mechanism 3 further includes a temperature sensor, which is used to detect the temperature of the conveying gas of the air knife 33, so as to facilitate the detection and regulation of the gas temperature and prevent the functional coating from being damaged by excessive gas temperature.

[0108] Optionally, the composite diaphragm processing device also includes a control component, which can be but is not limited to a programmable logic controller or a control circuit. The control component is communicated with at least the gas concentration sensor, temperature sensor, switch valve of the air duct hull 32 and heating component 34 in the gas phase separation mechanism 3. The control component can adjust the switching amplitude of the switch valve of the air duct hull 32 according to the solvent gas concentration detected by the gas concentration detection component to adjust the gas flow rate, and can adjust the heating temperature of the gas by the heating component 34 in combination with the temperature value detected by the temperature sensor.

[0109] like Figure 5As shown, in some embodiments, the traction mechanism 2 further includes a first drive roller 221 and a first pressure roller 223. The first drive roller 221 is arranged on the side of the input position of the first tension detection component 211. The first pressure roller 223 can press the substrate 5 onto the first drive roller 221. The first pressure roller 223 and the first drive roller 221 can clamp and press the substrate 5, which can not only provide conveying power for the substrate 5 and adjust the conveying speed of the substrate 5, but also cut off the upstream tension of the substrate 5, reduce the tension fluctuation of the substrate 5 in the section where the coating mechanism 1 is located, and make the first tension detection component 211 more accurate in detecting the tension of the substrate 5.

[0110] Optionally, the traction mechanism 2 also includes a first roller drive 222, which is in transmission connection with the first drive roller 221. The first roller drive 222 can drive the first drive roller 221 to rotate to regulate the rotation speed of the first drive roller 221. The first roller drive 222 can be but is not limited to a motor, a rotating cylinder or a rotating hydraulic cylinder.

[0111] like Figure 5 As shown, in some embodiments, the traction mechanism 2 also includes a first guide roller 224, which is arranged between the first drive roller 221 and the first tension detection assembly 211. The substrate 5 is sequentially wound around the first drive roller 221, the first guide roller 224 and the first tension detection assembly 211. The first guide roller 224 can approach or move away from the line connecting the first drive roller 221 and the first tension detection assembly 211 to facilitate loosening or tensioning the substrate 5. While being able to flexibly adjust the tension of the substrate 5, it reduces the position change of the first tension detection assembly 211, thereby ensuring the position accuracy of the distance between the first coating member 110, the second coating member 120 and the substrate 5.

[0112] Optionally, the first guide roller 224 can be mounted on a floor stand, slidably connected to the floor stand, and manually adjustable in position. Alternatively, a sliding drive member in the form of an air cylinder or hydraulic cylinder, or a combination of a motor and a lead screw nut, can be provided between the first guide roller 224 and the floor stand, capable of adjusting the distance between the line connecting the first drive roller 221 and the first tension detection assembly 211 and the first guide roller 224. The first drive roller 221, the first pressure roller 223, and the first guide roller 224 can be, but are not limited to, vacuum rollers or steel pressure rollers, which reduce slippage of the substrate 5 on the rollers, provide more thorough tension isolation of the substrate 5, and achieve more precise tension control of each section of the substrate 5.

[0113] In addition, the first tension detection assembly 211 can be communicatively connected to the control unit. When the upstream tension value detected by the first tension detection assembly 211 deviates slightly from the preset upstream tension range of the control unit, the rotational speed of the first drive roller 221 can be increased or decreased to adjust the tension of the substrate 5 at the first tension detection assembly 211 to the preset upstream tension range. When the upstream tension value detected by the first tension detection assembly 211 deviates significantly from the preset upstream tension range of the control unit, the distance between the line connecting the first drive roller 221 and the first tension detection assembly 211 and the first guide roller 224 can be increased or decreased, or the rotational speed of the first guide roller 224 can be increased or decreased. Of course, the rotational speed of the first drive roller 221 and the position or rotational speed of the first guide roller 224 can be adjusted in combination with each other. The closed-loop tension adjustment can ensure the tension control accuracy of the substrate 5 in the section where the first tension detection assembly 211 is located.

[0114] like Figure 5 As shown, in some embodiments, the traction mechanism 2 further includes a third tension detection assembly 231, a second drive roller 232, and a second pressure roller 234. The third tension detection assembly 231 is disposed at the outlet of the liquid phase separation mechanism 4 and is capable of real-time detection of the tension of the substrate 5 at the outlet of the liquid phase separation mechanism 4, thereby assisting the first tension detection assembly 211 and the second tension detection assembly 212 in stabilizing the tension in the coating section and the gas phase separation section. The second drive roller 232 is disposed on the side of the output of the third tension detection assembly 231. The second pressure roller 234 is capable of pressing the substrate 5 against the second drive roller 232. The second pressure roller 234 and the second drive roller 232 can clamp and press the substrate 5, thereby providing conveying power for the substrate 5 and adjusting the conveying speed of the substrate 5. In addition, the second pressure roller 234 and the second drive roller 232 can isolate the downstream tension of the substrate 5, thereby reducing the tension fluctuation of the substrate 5 in the sections where the coating mechanism 1, the gas phase separation mechanism 3, and the liquid phase separation mechanism 4 are located, thereby making the second tension detection assembly 212 more accurate in detecting the tension of the substrate 5.

[0115] Optionally, the traction mechanism 2 further includes a second roller driver 233, which is in transmission connection with the second drive roller 232. The second roller driver 233 can drive the second drive roller 232 to rotate, thereby regulating the rotation speed of the second drive roller 232. The second roller driver 233 can be, but is not limited to, a motor, a rotary cylinder, or a rotary hydraulic cylinder.

[0116] like Figure 5As shown, in some embodiments, the traction mechanism 2 also includes a second guide roller 235, which is arranged between the third tension detection component 231 and the second drive roller 232. The substrate 5 is sequentially wound around the third tension detection component 231, the second guide roller 235 and the second drive roller 232. The second guide roller 235 can approach or move away from the line connecting the second drive roller 232 and the third tension detection component 231 to facilitate loosening or tensioning the substrate 5. While being able to flexibly adjust the tension of the substrate 5, it reduces the position change of the third tension detection component 231 and the second tension detection component 212, thereby ensuring the position accuracy of the distance between the first coating member 110, the second coating member 120 and the substrate 5.

[0117] Optionally, the second guide roller 235 can also be mounted on a floor stand, slidably connected to the floor stand, and its position can be manually adjusted by applying force. Alternatively, a sliding drive member in the form of an air cylinder or hydraulic cylinder, or a combination of a motor and a lead screw nut, can be provided between the second guide roller 235 and the floor stand to adjust the distance between the line connecting the second drive roller 232 and the third tension detection assembly 231 and the second guide roller 235. The second drive roller 232, the second pressure roller 234, and the second guide roller 235 can be, but are not limited to, vacuum rollers or steel pressure rollers to reduce slippage of the substrate 5 on the rollers, more thoroughly isolate the tension of the substrate 5, and achieve more precise tension control accuracy for each section of the substrate 5.

[0118] like Figure 5 As shown, the third tension detection assembly 231 can be communicatively connected to the control unit. When the downstream tension value detected by the third tension detection assembly 231 deviates slightly from the preset downstream tension range of the control unit, the rotation speed of the second drive roller 232 can be increased or decreased to adjust the tension of the substrate 5 at the third tension detection assembly 231 to the preset downstream tension range. When the downstream tension value detected by the third tension detection assembly 231 deviates significantly from the preset downstream tension range of the control unit, the distance between the line connecting the second drive roller 232 and the third tension detection assembly 231 and the second guide roller 235 can be increased or decreased, or the rotation speed of the second guide roller 235 can be increased or decreased. Of course, the rotation speed of the second drive roller 232 and the position or rotation speed of the second guide roller 235 can be adjusted in combination. The closed-loop tension adjustment can ensure the tension control accuracy of the substrate 5 in the section where the third tension detection assembly 231 is located.

[0119] It can be understood that the first tension detection component 211, the second tension detection component 212, and the third tension detection component 231 described in the present application can be separately set tension detection components or multiple detection roller groups set to achieve tension detection. The tension detection components can have the same setting form or different settings, as long as they can achieve tension detection in the corresponding area.

[0120] like Figure 5 As shown, in some embodiments, the liquid phase separation mechanism 4 includes a box 41 and a plurality of third guide rollers 42. The box 41 is used to hold liquid, such as non-solvents such as water. The third guide rollers 42 are rotatably connected to the box 41. The plurality of third guide rollers 42 are arranged at intervals in the box 41. There is a height difference between two adjacent third guide rollers 42. The plurality of third guide rollers 42 are arranged on the side where the output position of the second tension detection component 212 is located, that is, the plurality of third guide rollers 42 are located downstream of the second tension detection component 212 and are distributed one by one at intervals up and down. The substrate 5 coated with the functional coating can be extended in the first direction and spread out one by one up and down, so that the functional coating on both sides of the substrate 5 can fully contact the liquid in the box 41. After liquid phase separation, the substrate 5 coated with the functional coating can form a composite diaphragm. The number of third guide rollers 42 can be determined according to the liquid phase separation time and the production line speed.

[0121] An embodiment of the third aspect of the present invention provides a composite diaphragm, which is prepared by a composite diaphragm processing device in any of the above-mentioned schemes. The composite diaphragm includes a substrate 5 and a functional coating coated on both sides of the substrate 5. The composite diaphragm processing device can synchronously coat the functional coating on both sides of the substrate 5, and can effectively control the thickness difference of the functional coating on both sides of the substrate 5, so that the thickness consistency of the functional coating on both sides of the substrate 5 is higher, and the functional coating on both sides of the substrate 5 has corresponding functions.

[0122] An embodiment of the fourth aspect of the present invention provides an electrolytic cell comprising an anode, a cathode and the above-mentioned composite diaphragm, wherein the functional coatings on both sides of the composite diaphragm have corresponding functions, which can improve the electrolysis efficiency of the electrolytic cell, reduce resistance, and enhance mechanical strength and dimensional stability.

[0123] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A coating mechanism, characterized in that: The coating mechanism comprises: Base (100); A first coating execution assembly comprises a first coating member (110) and a first support (111) connected to each other, wherein the first support (111) can selectively slide relative to or be fixed to the base (100) along a first direction; The second coating execution component comprises a second coating member (120) and a second support (121) connected to each other, wherein the second support (121) can selectively slide or be fixed relative to the base (100) along the first direction, the first coating member (110) and the second coating member (120) are arranged face to face in the first direction, and a coating channel is formed between the first coating member (110) and the second coating member (120), and the coating channel is used for allowing a substrate (5) to pass through.

2. The coating mechanism according to claim 1, characterized in that: The first coating execution component further comprises a first position-limiting adjustment member (112), the first position-limiting adjustment member (112) being arranged on the base (100), and the first position-limiting adjustment member (112) being located between the first support (111) and the second support (121); The first position-limiting adjustment member (112) comprises a first position-limiting plate (1121) and a first adjustment bolt (1122), wherein the first position-limiting plate (1121) is connected to the base (100), and the first adjustment bolt (1122) is threadedly connected to the first position-limiting plate (1121), and the first adjustment bolt (1122) is capable of moving along the first direction and abutting against the first support (111); and / or, The second coating execution component further includes a second position-limiting adjustment member (122), the second position-limiting adjustment member (122) being arranged on the base (100), and the second position-limiting adjustment member (122) being located between the first support (111) and the second support (121); The second limit adjustment member (122) includes a second limit plate (1221) and a second adjustment bolt (1222), wherein the second limit plate (1221) is connected to the base (100), and the second adjustment bolt (1222) is threadedly connected to the second limit plate (1221), and the second adjustment bolt (1222) can move along the first direction and abut against the second support (121).

3. The coating mechanism according to claim 1 or 2, characterized in that: The first coating execution component comprises a first lead screw (113) and a first rotation driving member (114), wherein the first lead screw (113) is arranged along the first direction and is rotationally connected to the base (100), the first support (111) is arranged on the first lead screw (113) and is transmission-connected to the first lead screw (113), the first rotation driving member (114) is arranged on the base (100) and is transmission-connected to the first lead screw (113), and the first rotation driving member (114) is capable of driving the first lead screw (113) to rotate; and / or, The second coating execution component includes a second screw (123) and a second rotating drive member (124), the second screw (123) is arranged along the first direction and is rotatably connected to the base (100), the second support (121) is arranged on the second screw (123) and is transmission-connected to the second screw (123), the second rotating drive member (124) is arranged on the base (100) and is transmission-connected to the second screw (123), and the second rotating drive member (124) can drive the second screw (123) to rotate.

4. The coating mechanism according to claim 3, characterized in that: The first coating execution component further comprises a first slide rail (115) and a first slider (116), wherein the first slide rail (115) is extended along the first direction and fixedly connected to the base (100), the first slider (116) is threadedly connected to the first lead screw (113) and slidably connected to the first slide rail (115), and the first support (111) is arranged on the first slider (116); and / or, The second coating execution component also includes a second slide rail (125) and a second slider (126), the second slide rail (125) extending along the first direction and fixedly connected to the base (100), the second slider (126) being threadedly connected to the second lead screw (123) and slidingly connected to the second slide rail (125), and the second support (121) being arranged on the second slider (126).

5. The coating mechanism according to claim 1, characterized in that: The first coating execution component further includes a first clamping component (130), and the first clamping component (130) is arranged at the inlet side of the coating channel; and / or, The second coating execution component further includes a second clamping component (140), and the second clamping component (140) is arranged at the outlet side of the coating channel.

6. A composite diaphragm processing device, characterized in that: include: The coating mechanism according to any one of claims 1 to 5; A traction mechanism (2) comprising a first tension detection component (211) and a second tension detection component (212), wherein the first tension detection component (211) is arranged at the inlet side of the coating channel, and the second tension detection component (212) is arranged at the outlet side of the coating channel.

7. The composite diaphragm processing device according to claim 6, characterized in that: The conveying directions of the first tension detection component (211) and the second tension detection component (212) intersect with the horizontal direction, and the minimum angle between the conveying direction and the horizontal direction is in the range of 85°-95°.

8. The composite diaphragm processing device according to claim 7, characterized in that: The first coating member (110) is configured as a first slot die module, and the second coating member (120) is configured as a second slot die module. The die lip opening of the first slot die module is equal to the die lip opening of the second slot die module.

9. The composite diaphragm processing device according to claim 7, characterized in that: The composite diaphragm processing device further comprises a gas phase separation mechanism (3) and a liquid phase separation mechanism (4), wherein the gas phase separation mechanism (3) is arranged between the coating mechanism (1) and the liquid phase separation mechanism (4).

10. The composite diaphragm processing device according to claim 9, characterized in that: The gas phase separation mechanism (3) comprises: a housing (31), the housing (31) having a working chamber, an inlet, and an outlet, the inlet and the outlet being in communication with the working chamber; At least two air duct hulls (32), the air duct hulls (32) are arranged in the working chamber, and the air duct hulls (32) are used to communicate with an external air source; a plurality of air knives (33) are arranged at intervals on the air duct hull (32), and the air ducts of the air knives (33) can be selectively connected to or disconnected from the inner cavity of the air duct hull (32); the air duct hulls (32) are arranged in groups of two, and the air knives (33) on the two air duct hulls (32) in each group face each other; there is a distance between the air knives (33) of the two air duct hulls (32) in each group to form a gas separation channel, and the gas separation channel is used for the coated substrate (5) to pass through; Preferably, the gas phase separation mechanism (3) further comprises a heating element (34) for heating the conveying gas of the air knife (33).

11. A composite diaphragm, characterized in that: The composite diaphragm is prepared by the composite diaphragm processing device described in any one of claims 6-10.

12. An electrolytic cell, characterized in that: The invention comprises an anode, a cathode and the composite separator as claimed in claim 11.

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