An automated bipolar film production line

Abstract

This invention relates to the field of ion exchange membrane production technology, and in particular discloses an automated bipolar membrane production equipment and production line, comprising: an unwinding device, a coating device, a pressing device, and a drying device; the unwinding device includes a first unwinding roller and a second unwinding roller, the inlet of the coating device is aligned with the second unwinding roller, the coating device includes a slit coating head and a guide roller, the coating device is used to form a wet coating on the cathode base membrane, the pressing device is located near the outlet of the coating device, the pressing device includes a lower guide roller and a limiting bottom roller, the bottom of the lower guide roller is tangent to one side of the anode base membrane, the top of the limiting bottom roller is tangent to one side of the cathode base membrane, the first unwinding roller is used to supply the anode base membrane to the lower guide roller, and the second unwinding roller is used to supply the cathode base membrane to the coating device, effectively realizing automated production of bipolar membranes, improving production efficiency while ensuring production quality.

Description

Technical Field

[0001] This invention relates to the field of ion exchange membrane production technology, and in particular to an automated bipolar membrane production equipment and its production line. Background Technology

[0002] Bipolar membranes are a type of special ion exchange membrane. They are mainly composed of an anode membrane and a cathode membrane, forming a composite membrane. The characteristic of bipolar membranes is that under the action of a DC electric field, water molecules between the cathode and anode membrane composite layers dissociate into hydrogen ions and hydroxide ions. Due to this characteristic, bipolar membranes are mainly used in zero-emission, resource recovery, and chemical synthesis fields.

[0003] Existing bipolar membranes are mainly produced by forming an interfacial catalytic layer between the cathode and anode membranes. This interfacial catalytic layer dissociates water molecules. Therefore, the key to manufacturing high-performance bipolar membranes lies in constructing a uniform, stable, and highly catalytically active intermediate interfacial layer between the cathode and anode membranes. Current mainstream production methods for bipolar membranes still heavily rely on multi-process, discrete, and intermittent operations, such as manual coating, segmented lamination, and batch baking. This mode has a long production cycle, requires a large area, and is labor-intensive. Furthermore, due to the extensive manual intervention, there are significant batch-to-batch differences in product thickness uniformity, interlayer bonding, and interfacial performance. This makes it impossible to meet the demand for large-scale, continuous, and stable supply. Intermittent production is inefficient and has poor quality control.

[0004] While continuous production equipment currently on the market can improve work efficiency compared to manual production, existing continuous equipment mainly adopts double-sided coating or thermal lamination of dry anode film to dry cathode film. When double-sided coating is used to coat the opposite side of the two films and then laminate them, the two layers of fluid slurry are easily squeezed and mixed with each other, resulting in blurred interface layer and uncontrollable thickness. When using "dry anode film to dry cathode film" for thermal lamination, it is difficult to form a chemical interface with high catalytic activity, and only physical adhesion is achieved, which easily leads to high product resistance and poor performance, making it difficult to ensure the production quality of bipolar films.

[0005] While the advanced "single-sided wet coating and dry film" lamination process can theoretically achieve in-situ construction of a clear interface, it requires extremely high control over the lamination process. Existing continuous production equipment is difficult to apply to the single-sided wet coating and dry film process. Furthermore, the equipment mainly uses parallel rollers at a fixed angle. When initially laminating the dried functional top film with the bottom film carrying the wet coating, it is very easy for air bubbles to be trapped, wrinkles to be generated, or the wet coating to be shifted due to the mismatch between the confluence angle and pressure, resulting in irreversible interface defects and affecting the production efficiency of bipolar films.

[0006] Therefore, how to achieve fully automated production of bipolar films is a technical problem that technicians need to solve. Summary of the Invention

[0007] The purpose of this invention is to provide an automated bipolar film production equipment and production line to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an automated bipolar film production device, comprising: Unwinding device, coating device, pressing device, and drying device; The unwinding device includes a first unwinding roller and a second unwinding roller. The inlet of the coating device is aligned with the second unwinding roller. The coating device includes a slit coating head and a guide roller. The outlet of the slit coating head faces the guide roller and is used to form a wet coating on the cathode base film. The pressing device is located near the film outlet of the coating device. The pressing device includes a pressure guide roller and a limiting bottom roller. The bottom of the pressure guide roller is tangent to one side of the anode base film, and the top of the limiting bottom roller is tangent to one side of the cathode base film. The pressure guide roller is located on top of the limiting bottom roller. The first unwinding roller is used to supply the anode base film to the pressure guide roller, and the second unwinding roller is used to supply the cathode base film to the coating device.

[0009] Preferably, the pressing device further includes a mounting plate assembly and an adjusting drive component. The mounting plate assembly includes two mounting horizontal plates with one side of each plate facing each other. Both ends of the lower pressure guide roller and the limiting bottom roller are slidably mounted on the mounting horizontal plates. The power output end of the adjusting drive component is connected to the lower pressure guide roller and the limiting bottom roller respectively. The adjusting drive component is used to drive the sliding distance of the lower pressure guide roller and the limiting bottom roller.

[0010] Preferably, the coating apparatus further includes a support base plate, the slit coating head is movably disposed outside the support base plate, and a push cylinder is provided on the support base plate. The power output end of the push cylinder is connected to the slit coating head. The push cylinder is used to control the moving distance of the slit coating head. A gap is formed between the slit coating head and the guide roller for the cathode base film to pass through.

[0011] Preferably, the drying device includes a plurality of curing chambers, which are arranged sequentially along the film conveying direction and are connected in sequence. Each curing chamber includes a movable top cavity and a fixed bottom cavity. The movable top cavity is located directly above the fixed bottom cavity, and a lifting cylinder is provided on the outside of the curing chamber. The power output end of the lifting cylinder is fixedly connected to the outside of the movable top cavity, and the lifting cylinder is used to control the lifting height of the movable top cavity.

[0012] Preferably, the bottom of the movable top cavity is provided with several strip-shaped air outlet top plates, and the top of the fixed bottom cavity is provided with several strip-shaped air outlet bottom plates. The strip-shaped air outlet top plates are all connected to the inner cavity of the movable top cavity, and the strip-shaped air outlet bottom plates are all connected to the inner cavity of the fixed bottom cavity. The strip-shaped air outlet top plates and the strip-shaped air outlet bottom plates are aligned one by one, and the opposite side of the strip-shaped air outlet top plates and the strip-shaped air outlet bottom plates forms a conveying plane for the bipolar membrane to pass through.

[0013] Preferably, the unwinding device is provided with a traction mechanism, which includes a traction roller and several guide rollers, and the guide rollers are evenly distributed along the direction of film movement.

[0014] Preferably, it also includes a web guiding device, which is located near the film outlet of the drying device. The web guiding device includes a support plate and a web guiding roller. The web guiding roller is movably mounted on the top of the support plate, and a web guiding cylinder is provided on the support plate. The power output end of the web guiding cylinder is connected to the web guiding roller for transmission. The web guiding cylinder is used to control the moving distance of the web guiding roller.

[0015] Preferably, a thickness measuring device is also provided outside the film outlet of the drying device. The thickness measuring device includes a mounting vertical plate with a strip-shaped through hole. The strip-shaped through hole is aligned with the film outlet of the drying device, and a horizontally arranged thickness measuring plate is provided inside the strip-shaped through hole. The strip-shaped through hole is used for the bipolar film to pass through, and the thickness measuring plate is used to obtain the thickness of the bipolar film.

[0016] Preferably, the device further includes a preheating chamber, which is disposed between the pressing device and the drying device, and the inlet of the preheating chamber corresponds to the outlet of the pressing device, and the outlet of the preheating chamber corresponds to the inlet of the drying device.

[0017] This application also provides an automated bipolar film production line, including an automated bipolar film production device as described in any of the above claims, and a winding device located near the film outlet of the drying device.

[0018] Compared with the prior art, the present invention provides an automatic bipolar film production equipment and production line, which has the following advantages: it is equipped with an unwinding device, a coating device, a pressing device, and a drying device. The unwinding device includes a first unwinding roller and a second unwinding roller, aligning the inlet of the coating device with the second unwinding roller. The coating device includes a slit coating head and a guide roller, with the outlet of the slit coating head facing the guide roller to form a wet coating on the cathode substrate. This enables the second unwinding roller to supply the cathode substrate for single-sided coating via the coating device. A pressing device is located near the outlet of the coating device. The pressing device includes a lower guide roller and a limiting bottom roller, with the bottom of the lower guide roller tangent to one side of the anode substrate and the top of the limiting bottom roller tangent to one side of the cathode substrate. The lower guide roller is positioned on top of the limiting bottom roller. The first unwinding roller supplies the anode substrate to the lower guide roller, and the second unwinding roller supplies the cathode substrate. From the base film to the coating device, the anode base film and the coated cathode base film are pressed together by the pressing device. The separate conveying structure effectively realizes the separate conveying and merging of the dry film and wet coating, effectively avoiding the mutual compression of the two wet coating layers. The slit coating method of the coating device ensures that the coating thickness of the cathode base film is consistent, improving the uniformity and stability of the intermediate interface layer of the bipolar film. During the pressing process, the pressing device adopts the upper and lower corresponding structure of the lower guide roller and the limiting bottom roller to ensure stable pressure, ensure accurate alignment and pressing, and prevent air bubbles from entering the intermediate interface layer and wrinkles from forming in the base film. This effectively realizes fully automated production of bipolar films, improving work efficiency while ensuring the production quality of bipolar films. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the unwinding device in this invention.

[0022] Figure 3 This is a schematic diagram of the coating device and pressing device in this invention.

[0023] Figure 4 This is a schematic diagram of the coating device and pressing device from another perspective in this invention.

[0024] Figure 5 This is a schematic diagram of the external structure of the curing chamber in this invention.

[0025] Figure 6 This is a schematic diagram of the internal structure of the curing chamber in this invention.

[0026] Figure 7 This is a schematic diagram of the correction device structure in this invention.

[0027] Figure 8 This is a schematic diagram of the thickness measuring device in this invention.

[0028] As indicated by the labels in the diagram: 1. Unwinding device; 2. Coating device; 3. Pressing device; 4. Drying device; 5. Tracking device; 6. Thickness measuring device; 7. Rewinding device; 11. First unwinding roller; 12. Second unwinding roller; 13. Traction roller; 14. Guide roller; 21. Slit coating head; 22. Film guiding roller; 23. Support base plate; 24. Push cylinder; 31. Downward guide roller; 32. Limiting bottom roller; 33. Mounting horizontal plate; 34. Adjustment drive component; 41. Curing chamber; 411. Movable top cavity; 412. Fixed bottom cavity; 413. Lifting cylinder; 414. Strip-shaped air outlet top plate; 415. Strip-shaped air outlet bottom plate; 42. Preheating chamber; 51. Support plate; 52. Tracking guide roller; 53. Tracking cylinder; 61. Mounting vertical plate; 62. Strip-shaped through hole; 63. Thickness measuring plate. Detailed Implementation

[0029] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. Although preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0030] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] In the description of this application, it should be understood that the terms "thickness," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly including one or more of the feature.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0035] Example 1: This example provides an automated bipolar film production equipment, designed to automate the wet coating of the cathode substrate film and the automatic pressing of the anode and cathode substrate films. This aims to achieve a defect-free initial bonding between the dry and wet coatings, forming a uniform intermediate interface layer. (Refer to...) Figures 1 to 4 In this embodiment: by providing an unwinding device 1, a coating device 2, a pressing device 3, and a drying device 4, the unwinding device 1 includes a first unwinding roller 11 and a second unwinding roller 12. The first unwinding roller 11 is used to supply the anode base film, and the second unwinding roller 12 is used to supply the cathode base film. The inlet of the coating device 2 is aligned with the second unwinding roller 12 to receive the cathode base film for coating.

[0036] The coating device 2 in this embodiment includes a slit coating head 21 and a guide roller 22. The liquid outlet of the slit coating head 21 is directed towards the guide roller 22 to form a wet coating on the cathode base film. A pressing device 3 is also disposed near the film outlet of the coating device 2. The pressing device 3 includes a pressing guide roller 31 and a limiting bottom roller 32. The pressing guide roller 31 is positioned above the limiting bottom roller 32. The bottom of the pressing guide roller 31 is tangent to one side of the anode base film, and the top of the limiting bottom roller 32 is tangent to one side of the cathode base film. Therefore, the anode base film can be supplied to the pressing guide roller 31 by the first unwinding roller 11, and the cathode base film can be supplied to the coating device 2 by the second unwinding roller 12. When the pressing guide roller 31 pushes one side of the anode base film down, the other side of the anode base film approaches the coating surface of the cathode base film until the other side of the anode base film is pressed against the coating surface of the cathode base film, thereby automatically completing the bonding action.

[0037] As a further improvement of this embodiment, the pressing device 3 also includes a mounting plate assembly and an adjusting drive component 34. The mounting plate assembly includes two oppositely arranged mounting horizontal plates 33, so that both ends of the pressing guide roller 31 and the limiting bottom roller 32 are slidably arranged on the mounting horizontal plates 33.

[0038] In actual installation, a guide groove can be opened on the mounting plate 33 for the sliding of the pressure guide roller 31 and the limiting bottom roller 32. The power output end of the adjusting drive component 34 is connected to the pressure guide roller 31 and the limiting bottom roller 32 respectively to drive the pressure guide roller 31 and the limiting bottom roller 32 to slide along the guide groove, so as to adjust the gap and relative angle between the pressure guide roller 31 and the limiting bottom roller 32, thereby adjusting the pressing thickness of the cathode base film and the anode base film.

[0039] In this embodiment, by setting a sliding downward guide roller 31 and a limiting bottom roller 32, and cooperating with the adjusting drive component 34, the confluence angle and bonding pressure of the anode base film and the cathode base film can be precisely controlled. The adjustable angle pressing method can effectively avoid air bubbles, wrinkles or wet coating displacement caused by mismatch between confluence angle and pressure, ensuring defect-free initial bonding of the dry film and wet coating, and forming a uniform intermediate interface layer.

[0040] Example 2, based on Example 1, further improves the coating device 2 to achieve a wet coating with extremely high uniformity and good consistency in the width direction. In this example: Figure 3 and Figure 4As shown, the coating apparatus 2 includes a slit coating head 21, a film guiding roller 22, and a support base plate 23. The slit coating head 21 is movably mounted on the support base plate 23. A push cylinder 24 is provided on the support base plate 23, and the power output end of the push cylinder 24 is connected to the slit coating head 21 to control the moving distance of the slit coating head 21. This creates a gap between the slit coating head 21 and the film guiding roller 22 for the cathode base film to pass through. When the cathode base film enters the gap between the slit coating head 21 and the film guiding roller 22, the slit coating head 21 can coat one side of the cathode base film. In this embodiment, the slit coating head 21 is used to perform slit coating on one side of the cathode base film on the film guiding roller 22.

[0041] The slit coating technology in this embodiment can form a wet coating with uniform thickness in the width direction and no longitudinal stripes on the surface of the cathode substrate film. Compared with traditional roller coating or spray coating methods, it has higher coating accuracy and better repeatability.

[0042] It should be noted that by pushing the cylinder 24 to control the moving distance of the slit coating head 21, the distance between the slit coating head 21 and the guide roller 22 can be precisely adjusted. This is suitable for slit coating of cathode base films with different thicknesses, which significantly improves the applicability of the equipment and ensures that products of different specifications can obtain a uniform wet coating.

[0043] Example 3, based on Example 1, further improves the drying device 4 to achieve automated and uniform drying of the pressed bipolar film, and to prevent damage to the wet coating during the drying process. In this example: see Figure 1 , Figure 5 as well as Figure 6 The drying device 4 includes several curing chambers 41 arranged sequentially and connected in sequence along the film conveying direction. Each curing chamber 41 includes a movable top cavity 411 and a fixed bottom cavity 412. The movable top cavity 411 is located directly above the fixed bottom cavity 412. A lifting cylinder 413 is provided outside the curing chamber 41, and the power output end of the lifting cylinder 413 is fixedly connected to the outside of the movable top cavity 411 to control the lifting height of the movable top cavity 411. Thus, the lifting height of the movable top cavity 411 can be controlled by the lifting cylinder 413 to control the distance between the movable top cavity 411 and the fixed bottom cavity 412. The distance between the movable top cavity 411 and the fixed bottom cavity 412 can be adjusted according to the film thickness and production requirements, making it suitable for curing films of different thicknesses.

[0044] It should be further explained that a fan for supplying hot air is also provided at the bottom of each curing chamber 41. The air outlet of each fan is connected to the movable top cavity 411 and the fixed bottom cavity 412 of each curing chamber 41 through the air duct, thereby realizing the supply of hot air to the interior of the movable top cavity 411 and the fixed bottom cavity 412.

[0045] It should also be noted that by setting several strip-shaped air outlet top plates 414 at the bottom of the movable top cavity 411 and several strip-shaped air outlet bottom plates 415 at the top of the fixed bottom cavity 412, the strip-shaped air outlet top plates 414 are all connected to the inner cavity of the movable top cavity 411, and the strip-shaped air outlet bottom plates 415 are all connected to the inner cavity of the fixed bottom cavity 412, so that the strip-shaped air outlet top plates 414 and strip-shaped air outlet bottom plates 415 are aligned one by one, so that they are arranged opposite each other to form a conveying plane for the bipolar membrane to pass through.

[0046] When one side of the cathode base film is coated and pressed with the anode base film to form a bipolar film, the bipolar film enters the curing chamber 41 for heating and curing. Several air outlet holes are provided on the opposite sides of the strip-shaped air outlet top plate 414 and the strip-shaped air outlet bottom plate 415, and the inner cavity of the strip-shaped air outlet top plate 414 and the movable top cavity 411 are connected. The inner cavity of the strip-shaped air outlet bottom plate 415 and the fixed bottom cavity 412 are also connected. This facilitates the output of hot air through the strip-shaped air outlet top plate 414 and the strip-shaped air outlet bottom plate 415, so that the bipolar film passing between the strip-shaped air outlet top plate 414 and the strip-shaped air outlet bottom plate 415 is uniformly heated, ensuring that the hot air uniformly cures the bipolar film.

[0047] In this embodiment, hot air curing is performed on both sides of the bipolar membrane by strip-shaped air outlet top plate 414 and strip-shaped air outlet bottom plate 415 respectively. During the air outlet curing process, both sides of the bipolar membrane are subjected to uniform force, so that the bipolar membrane can float through the inside of the curing box 41. This effectively prevents either side of the bipolar membrane from directly contacting or colliding with the inside of the curing box 41 during the transportation process, ensuring that the coating will not be damaged by collision.

[0048] In Example 4, since the cathode and anode base films of the bipolar membrane are mainly made of polymer materials, which are very sensitive to temperature, if the bipolar membrane is directly transferred from room temperature to high temperature during the heat curing process, the substrate will suddenly expand, leading to wrinkling and misalignment. Furthermore, the thermal expansion coefficients of the materials on both sides of the anode and cathode base films are not the same; sudden heating can cause curling, interlayer stress, and damage to the newly formed intermediate interface layer, thus affecting production quality. To improve production quality, this example adds a preheating chamber 42 based on Example 1. (See Example 1 for details.) Figure 1The preheating chamber 42 is set between the pressing device 3 and the drying device 4, so that the inlet of the preheating chamber 42 corresponds to the outlet of the pressing device 3, and the outlet of the preheating chamber 42 corresponds to the inlet of the drying device 4. By setting the preheating chamber 42, the bipolar film is preheated before entering the main drying oven. In the preheating chamber 42, the temperature of the film material slowly rises to close to the temperature of the main drying oven, so that the polymer chains have enough time to relax, eliminate internal stress, and ensure smooth film flow and dimensional stability when entering the main drying oven.

[0049] The gradient heating method adopted in this embodiment effectively avoids problems such as wrinkling and deformation caused by sudden heating, while preventing curling and interlayer stress caused by the difference in thermal expansion coefficient of the composite film, ensuring that the newly formed intermediate interface layer is not damaged, and significantly improving production quality.

[0050] Example 5, to achieve continuous production and adapt to mass production operations, provides a complete continuous production line structure based on any one of Examples 1 to 4. See [link to example]. Figure 1 This embodiment also includes a traction mechanism, a correction device 5, a thickness measuring device 6, and a winding device 7. By providing a traction mechanism outside the unwinding device 1, the traction mechanism includes a traction roller 13 and several guide rollers 14 evenly distributed along the film movement direction. During the unwinding process, the traction mechanism ensures that the film remains straight and moves to the subsequent station during unwinding. The correction device 5 is set near the film outlet of the drying device 4. The correction device 5 includes a support plate 51 and a correction guide roller 52. The correction guide roller 52 is movably set on the support plate 51. A correction cylinder 53 is set on the support plate 51, and the power output end of the correction cylinder 53 is connected to the correction guide roller 52 for transmission. This is used to control the moving distance of the correction guide roller 52. The moving distance of the correction guide roller 52 is adjusted by the correction cylinder 53, thereby causing the correction guide roller 52 to drive the bipolar film delivered from the drying device 4 to perform position correction, so as to ensure accurate film outlet position.

[0051] In this embodiment, a thickness measuring device 6 is provided outside the film outlet of the drying device 4. The thickness measuring device 6 includes a mounting vertical plate 61. A strip-shaped through hole 62 aligned with the film outlet of the drying device 4 is provided on the mounting vertical plate 61. A thickness measuring plate 63 is horizontally arranged inside the strip-shaped through hole 62. When the drying device 4 dries the bipolar film and the bipolar film passes through the strip-shaped through hole 62 through the film outlet of the drying device 4, the thickness of the bipolar film can be obtained through the thickness measuring plate 63, thereby achieving the effect of detecting the thickness of the bipolar film.

[0052] As a further improvement to this embodiment, this embodiment also includes a controller (not shown in the figure). The controller is electrically connected to the thickness measuring device 6 and the adjustment drive 34 respectively. In the actual production process, the thickness measuring device 6 can be used to obtain whether the thickness detection value of the bipolar film meets the production requirement size range.

[0053] During operation, the thickness measuring device 6 acquires the thickness detection value of the bipolar film and sends it to the controller. The controller compares the thickness detection value with the preset production requirement size range. When the detection value deviates from the preset range, the control adjustment drive 34 automatically adjusts the relative position between the pressure guide roller 31 and the limiting bottom roller 32, thereby realizing automated control of the thickness of the bipolar film and ensuring production quality. The winding device 7 is set near the film outlet of the drying device 4 to wind up the finished bipolar film after drying and curing.

[0054] This embodiment integrates various functional units such as unwinding, coating, pressing, preheating, drying, thickness measurement, web guiding, and rewinding into a complete automated production line, realizing continuous production throughout the entire process from unwinding to rewinding. In this embodiment, the traction mechanism ensures straight film movement, the web guiding device 5 ensures accurate film exit position, and the thickness measurement device 6, in conjunction with the controller, achieves closed-loop automatic control, which greatly improves production efficiency, reduces manual intervention, ensures product consistency, and can well adapt to the needs of mass production.

[0055] The solutions of this application have been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiments can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiments can be combined, divided, and deleted according to actual needs. The various embodiments of this application have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or improvements to the technology in the market of the various embodiments, or to enable other those skilled in the art to understand the various embodiments disclosed herein.

Claims

1. An automated bipolar film production equipment, characterized in that, include: Unwinding device, coating device, pressing device, and drying device; The unwinding device includes a first unwinding roller and a second unwinding roller. The inlet of the coating device is aligned with the second unwinding roller. The coating device includes a slit coating head and a guide roller. The outlet of the slit coating head faces the guide roller and is used to form a wet coating on the cathode base film. The pressing device is located near the film outlet of the coating device. The pressing device includes a lower guide roller and a limiting bottom roller. The bottom of the lower guide roller is tangent to one side of the anode base film, and the top of the limiting bottom roller is tangent to one side of the cathode base film. The lower guide roller is located on top of the limiting bottom roller. The first unwinding roller is used to supply the anode base film to the lower guide roller, and the second unwinding roller is used to supply the cathode base film to the coating device.

2. The automatic bipolar film production equipment according to claim 1, characterized in that, The pressing device further includes a mounting plate assembly and an adjusting drive component. The mounting plate assembly includes two mounting horizontal plates with one side of each plate facing each other. Both ends of the lower pressure guide roller and the limiting bottom roller are slidably mounted on the mounting horizontal plates. The power output end of the adjusting drive component is connected to the lower pressure guide roller and the limiting bottom roller respectively. The adjusting drive component is used to drive the sliding distance of the lower pressure guide roller and the limiting bottom roller.

3. The automatic bipolar film production equipment according to claim 1, characterized in that, The coating device also includes a support base plate, the slit coating head is movably disposed outside the support base plate, and a push cylinder is provided on the support base plate. The power output end of the push cylinder is connected to the slit coating head. The push cylinder is used to control the moving distance of the slit coating head. A gap is formed between the slit coating head and the guide roller for the cathode base film to pass through.

4. The automatic bipolar film production equipment according to claim 1, characterized in that, The drying device includes several curing chambers arranged sequentially along the film conveying direction and connected in sequence. Each curing chamber includes a movable top cavity and a fixed bottom cavity. The movable top cavity is located directly above the fixed bottom cavity. A lifting cylinder is provided on the outside of the curing chamber. The power output end of the lifting cylinder is fixedly connected to the outside of the movable top cavity. The lifting cylinder is used to control the lifting height of the movable top cavity.

5. The automatic bipolar film production equipment according to claim 4, characterized in that, The bottom of the movable top cavity is provided with several strip-shaped air outlet top plates, and the top of the fixed bottom cavity is provided with several strip-shaped air outlet bottom plates. The strip-shaped air outlet top plates are all connected to the inner cavity of the movable top cavity, and the strip-shaped air outlet bottom plates are all connected to the inner cavity of the fixed bottom cavity. The strip-shaped air outlet top plates and the strip-shaped air outlet bottom plates are aligned one by one. The opposite sides of the strip-shaped air outlet top plates and the strip-shaped air outlet bottom plates form a conveying plane for the bipolar membrane to pass through.

6. The automatic bipolar film production equipment according to claim 1, characterized in that, The unwinding device is externally provided with a traction mechanism, which includes a traction roller and several guide rollers, which are evenly distributed along the direction of film movement.

7. The automatic bipolar film production equipment according to claim 1, characterized in that, It also includes a web-correcting device, which is located near the film outlet of the drying device. The web-correcting device includes a support plate and a web-correcting guide roller. The web-correcting guide roller is movably mounted on the top of the support plate, and a web-correcting cylinder is provided on the support plate. The power output end of the web-correcting cylinder is connected to the web-correcting guide roller, and the web-correcting cylinder is used to control the moving distance of the web-correcting guide roller.

8. The automatic bipolar film production equipment according to claim 1, characterized in that, A thickness measuring device is also provided outside the film outlet of the drying device. The thickness measuring device includes a mounting vertical plate with a strip-shaped through hole. The strip-shaped through hole is aligned with the film outlet of the drying device, and a horizontally arranged thickness measuring plate is provided inside the strip-shaped through hole. The strip-shaped through hole is used for the bipolar film to pass through, and the thickness measuring plate is used to obtain the thickness of the bipolar film.

9. The automatic bipolar film production equipment according to claim 1, characterized in that, It also includes a preheating chamber, which is located between the pressing device and the drying device, and the inlet of the preheating chamber corresponds to the outlet of the pressing device, and the outlet of the preheating chamber corresponds to the inlet of the drying device.

10. An automated bipolar film production line, characterized in that, It includes an automated bipolar film production apparatus as described in any one of claims 1 to 9, and a winding device located near the film outlet of the drying apparatus.

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