Integrated multilayer coating apparatus

Abstract

The application provides an integrated multi-layer coating device, which comprises a rack, a traction assembly and a coating assembly; the rack comprises an upper rack and a lower rack, the upper rack is arranged above the lower rack; the traction assembly comprises an unwinding part, an upward traction part, a horizontal traction part, a downward traction part and a winding part, the upward traction part and the downward traction part are arranged across the upper rack and the lower rack, and the horizontal traction part is arranged on the upper rack or the lower rack; the coating assembly comprises a first coating part, a second coating part and a third coating part, the first coating part is arranged between the unwinding part and the upward traction part, the second coating part is arranged between the upward traction part and the horizontal traction part, and the third coating part is arranged between the horizontal traction part and the downward traction part. The application can sequentially complete three-layer coating work on a substrate, realize one machine with multiple functions, improve the continuity of coating production, improve production efficiency, reduce labor cost, further improve the comprehensive performance of a product and improve product quality by coating three layers of slurry.

Description

Technical Field

[0001] This utility model relates to the field of optical film equipment technology, specifically to an integrated multilayer coating equipment. Background Technology

[0002] Coating equipment is a core device used to uniformly coat functional slurries (such as electrode materials, optical adhesives, etc.) onto flexible substrates (such as PET films, copper foils, etc.). It uses a slit extrusion coating head or micro-gravure roller, combined with a high-precision metering pump, doctor blade system and tension control unit, to achieve continuous and stable coating of slurry with a certain thickness accuracy. It is suitable for fields such as lithium battery electrodes, optical films, and semiconductor packaging.

[0003] With increasingly stringent requirements for coating quality, multi-layer coating of slurry on the substrate surface offers significant advantages in process stability and electrochemical performance compared to single-layer coating. However, existing coating equipment can only apply a single layer of slurry to the substrate surface. After one layer is applied, it needs to be transferred to another coating equipment for the next layer. This means that multiple coating equipment is still required to achieve multi-layer coating, which not only incurs significant manpower and handling costs but also prevents continuous coating production, resulting in low production efficiency. Furthermore, the handling process can easily cause product damage, affecting product quality. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides an integrated multilayer coating device.

[0005] This application discloses an integrated multilayer coating equipment comprising: a frame, a traction assembly, and a coating assembly; the frame includes an upper frame and a lower frame, with the upper frame erected above the lower frame; the traction assembly includes an unwinding component, an ascending traction component, a horizontal traction component, a descending traction component, and a winding component arranged sequentially along the substrate conveying direction, with the unwinding component and the winding component respectively located on the lower frame, the ascending traction component and the descending traction component spanning across the upper and lower frames, and the horizontal traction component located on either the upper or lower frame; the coating assembly includes a first coating component, a second coating component, and a third coating component, with the first coating component located between the unwinding component and the ascending traction component, the second coating component located between the ascending traction component and the horizontal traction component, and the third coating component located between the horizontal traction component and the descending traction component.

[0006] Preferably, the frame further includes a first operating table, which is adjacent to the lifting traction member, and the second coating member is disposed on the first operating table.

[0007] Preferably, the frame further includes a second operating table, the upper frame includes a first upper frame and a second upper frame, the second operating table is disposed between the first upper frame and the second upper frame, and the third coating component and the horizontal traction component are respectively disposed on the second operating table, the upward traction component spans across the first upper frame and the lower frame, and the downward traction component spans across the second upper frame and the lower frame.

[0008] Preferably, the coating assembly further includes a corona electrode assembly disposed between the unwinding member and the first coating member.

[0009] Preferably, the coating assembly further includes a thickness measuring component, which is located between the lowering traction member and the winding member.

[0010] Preferably, the first coating component includes a base coating mechanism and a first oven, and the unwinding component, the base coating mechanism, the first oven and the lifting traction component are arranged sequentially along the substrate conveying direction.

[0011] Preferably, the first oven includes an oven body and a steam heater, with the steam heater connected to the oven body.

[0012] Preferably, the first oven also includes an electric heater, which is located in the oven body.

[0013] Preferably, there are multiple first ovens connected in sequence, and the multiple first ovens are located between the bottom coating mechanism and the rising traction component.

[0014] Preferably, the traction assembly further includes a correction element disposed between the first coating element and the rising traction element.

[0015] The beneficial effects of this application are as follows: the unwinding component 21 unwinds the substrate, and the substrate passes sequentially through the first coating component 31, the second coating component 32, and the third coating component 33 under the traction of the rising traction component 22, the horizontal traction component 23, the descending traction component 24, and the winding component 25. The first coating component 31 performs the first coating operation on the substrate and forms a base slurry layer on the base surface. The second coating component 32 performs the second coating operation on the substrate and forms a second slurry layer on the surface of the base slurry layer. The third coating component 33 performs the third coating operation on the substrate and forms a third slurry layer on the surface of the second slurry layer. In this way, this application can complete three coating operations on the substrate in sequence, realize multi-functionality, improve the continuity of coating production, increase production efficiency, reduce labor costs, and at the same time, coating three slurry layers can further improve the comprehensive performance of the product and improve product quality. Furthermore, by setting up the upper rack 11 and the lower rack 12, there is no need to occupy a large amount of factory floor space, which can make full use of the height space of the factory and improve the space utilization rate. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the integrated multilayer coating equipment in the embodiment; Figure 2 This is a schematic diagram of the unwinding component in the embodiment; Figure 3 This is a schematic diagram of the underlying coating mechanism and corona assembly in the embodiment; Figure 4 This is a schematic diagram of the structure of the first drying oven in the embodiment; Figure 5 This is a schematic diagram of the thickness measuring component in the embodiment; Figure 6 This is a schematic diagram of the structure of the lifting traction component and the correction component in the embodiment.

[0017] Figure label: 1. Frame; 11. Upper frame; 111. First upper frame; 112. Second upper frame; 12. Lower frame; 13. First operating table; 14. Second operating table; 2. Traction assembly; 21. Unwinding component; 22. Rising traction component; 221. Rising frame; 222. Guide roller; 23. Horizontal traction component; 24. Lowering traction component; 25. Rewinding component; 26. Tracking component; 3. Coating assembly; 31. First coating component; 311. Undercoating mechanism; 312. First oven; 32. Second coating component; 321. Second coating mechanism; 322. Second oven; 33. Third coating component; 331. Third coating mechanism; 332. Third oven; 34. Corona discharge assembly; 35. Thickness measuring assembly. Detailed Implementation

[0018] The following drawings disclose several embodiments of this application. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this application. That is, in some embodiments of this application, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0019] It should be noted that all directional indications in the embodiments of this application, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0020] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit this application. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0021] To further understand the content, features, and effects of this application, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0022] Reference Figure 1 , Figure 1 The diagram below illustrates the structure of the integrated multilayer coating equipment in this embodiment. The integrated multilayer coating equipment includes a frame 1, a traction assembly 2, and a coating assembly 3. The frame 1 includes an upper frame 11 and a lower frame 12, with the upper frame 11 mounted above the lower frame 12. The traction assembly 2 includes an unwinding component 21, an ascending traction component 22, a horizontal traction component 23, a descending traction component 24, and a winding component 25 arranged sequentially along the substrate conveying direction. The unwinding component 21 and the winding component 25 are respectively located on the lower frame 12. The ascending traction component 22 and the descending traction component 24 span across the upper frame 11 and the lower frame 12. The horizontal traction component 23 is located on either the upper frame 11 or the lower frame 12. The coating assembly 3 includes a first coating member 31, a second coating member 32 and a third coating member 33. The first coating member 31 is disposed between the unwinding member 21 and the rising traction member 22, the second coating member 32 is disposed between the rising traction member 22 and the horizontal traction member 23, and the third coating member 33 is disposed between the horizontal traction member 23 and the falling traction member 24.

[0023] Reference Figure 2 , Figure 2This is a schematic diagram of the unwinding component in the embodiment. The integrated multilayer coating equipment in this embodiment is used for coating substrates, which can be materials such as PET film and copper foil. The lower frame 12 is set on the factory floor, and the upper frame 11 is erected above the lower frame 12. The unwinding component 21 has the substrate to be coated wound on it for unwinding the substrate. The substrate is sequentially coated by the first coating unit 31, the second coating unit 32, and the third coating unit 33 under the traction of the rising traction member 22, the horizontal traction member 23, the descending traction member 24, and the winding member 25. The first coating unit 31 performs the first coating operation on the substrate, forming a base slurry layer on the base surface. The second coating unit 32 performs the second coating operation on the substrate, forming a second slurry layer on the surface of the base slurry layer. The third coating unit 33 performs the third coating operation on the substrate, forming a third slurry layer on the surface of the second slurry layer. In this embodiment, three coating operations can be completed on the substrate sequentially, realizing multi-functionality, improving the continuity of coating production, increasing production efficiency, and reducing labor costs. At the same time, coating three slurry layers can further improve the overall performance and quality of the product. In addition, the setting of the upper frame 11 and the lower frame 12 eliminates the need to occupy a large amount of factory floor space, making full use of the height space of the factory and improving space utilization.

[0024] Reference Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the underlying coating mechanism and corona assembly in the embodiment. Figure 4The diagram illustrates the structure of the first oven in this embodiment. The first coating component 31 includes a base coating mechanism 311 and a first oven 312. Along the substrate conveying direction, the unwinding component 21, the base coating mechanism 311, the first oven 312, and the lifting traction component 22 are sequentially arranged. In practical application, this embodiment first performs a first coating operation on the substrate, forming a base slurry layer on the base surface. It can be understood that the unwinding component 21 unwinds the substrate, and the substrate, under the traction of the lifting traction component 22, sequentially passes through the base coating mechanism 311 and the first oven 312. The base coating mechanism 311 performs a slurry coating operation on the surface of the substrate. After the base coating is completed, the substrate enters the first oven 312 to dry the slurry. Furthermore, there are multiple first ovens 312, which are connected sequentially and located between the base coating mechanism 311 and the lifting traction component 22. By setting up multiple first ovens 312, temperature gradient control can be achieved. Specifically, the temperature of the first oven 312 closest to the bottom coating mechanism 311 is lower, allowing the slurry to evaporate slowly and evenly, preventing rapid skinning. Then, along the substrate conveying direction, the temperature of the multiple first ovens 312 first rises and then falls. It can be understood that the temperature of the middle first oven 312 is higher; that is, after the substrate surface has initially stabilized, increasing the temperature can accelerate the diffusion and evaporation of the slurry, which is the main drying stage. The temperature of the first oven 312 closest to the rising traction member 22 is lower than that of the middle first oven 312. This ensures that the slurry layer is completely dry and also prevents the slurry layer from coming into contact with air at high temperatures, thus avoiding stress or oxidation. Specifically, the first oven 312 includes an oven body and a steam heater, with the steam heater connected to the oven body. The bottom coating mechanism 311 is a slot coating mechanism, which has a substrate traction roller inside to pull the substrate to the coating head for coating operations.

[0025] Preferably, the first oven 312 further includes an electric heater, which is located in the oven body. In specific applications, the first oven 312 in this embodiment uses a combination of steam heating and electric heating. The steam heater releases low-pressure steam to heat the inner liner of the oven, while the electric heater heats the inner liner of the oven by electric heating. This ensures that the oven temperature is raised to 180 degrees Celsius under low-pressure steam conditions in conjunction with electric heating, which greatly reduces heating costs compared to the traditional method of using only steam heating. Specifically, the structures of the second coating component 32 and the third coating component 33 are similar to those of the first coating component 31. That is, the second coating component 32 includes a second coating mechanism 321 and multiple second ovens 322, and the third coating component 33 includes a third coating mechanism 331 and multiple third ovens 332. It can be understood that the bottom coating mechanism 311 first coats the surface of the substrate with a first slurry layer and dries it in the first oven 312. Then, when the substrate passes through the second coating mechanism 321, the second coating mechanism 321 coats a second slurry layer on the surface of the first slurry layer and dries it in the second oven 322. Then, when the substrate passes through the third coating mechanism 331, the third coating mechanism 331 coats the surface of the substrate with a third slurry layer on the surface of the second slurry layer and dries it in the third oven 332. In this way, the first coating component 31, the second coating component 32 and the third coating component 33 are arranged in sequence to perform three coating operations on the substrate, and three slurry layers are applied to the surface of the substrate in sequence, thereby further improving the overall performance of the product.

[0026] Rereference Figure 1 Preferably, the frame 1 further includes a first operating table 13, which is adjacent to the lifting traction member 22, and the second coating member 32 is disposed on the first operating table 13. In specific applications, the second coating mechanism 321 is disposed on the first operating table 13, and multiple second drying ovens 322 are sequentially connected on the upper frame 11. By setting the first operating table 13, the height of the second coating mechanism 321 can be increased, that is, the height of the coating head of the second coating mechanism 321 can be increased, so that the height of the coating head of the second coating mechanism 321 is close to the height of the second drying ovens 322 located on the upper frame 11. In this way, when the second coating mechanism 321 coats the substrate, the substrate can enter the second drying oven 322 in a relatively horizontal state for drying, avoiding the situation where the substrate climbs the slope before the slurry is dry, causing the slurry on the surface of the substrate to flow back, thus improving product quality. Furthermore, the operator can stand on the first operating table 13, which is equivalent to the coating station of the second coating mechanism 321, making it convenient for the operator to monitor and operate the second coating mechanism 321 in real time.

[0027] Rereference Figure 1Preferably, the frame 1 further includes a second operating table 14. The upper frame 11 includes a first upper frame 111 and a second upper frame 112. The second operating table 14 is located between the first upper frame 111 and the second upper frame 112. The third coating component 33 and the horizontal traction component 23 are respectively located on the second operating table 14. The upward traction component 22 spans across the first upper frame 111 and the lower frame 12, and the downward traction component 24 spans across the second upper frame 112 and the lower frame 12. In practical applications, multiple second drying ovens 322 are connected in sequence on the first upper frame 111, and multiple third drying ovens 332 are connected in sequence on the second upper frame 112. The third coating mechanism 331 is located on the second operating table 14. By setting the second operating table 14, the height of the third coating mechanism 331 can be increased, that is, the height of the coating head of the third coating mechanism 331 can be increased, so that the height of the coating head of the third coating mechanism 331 is close to the height of the third drying oven 332 located on the second upper frame 112. In this way, when the third coating mechanism 331 coats the substrate, the substrate can enter the third drying oven 332 in a relatively horizontal state for drying, avoiding the situation where the substrate climbs the slope before the slurry is dry, causing the slurry on the surface of the substrate to flow back, thus improving product quality.

[0028] Rereference Figure 1 and Figure 3 Preferably, the coating assembly 3 further includes a corona electrode assembly 34, which is disposed between the unwinding member 21 and the first coating member 31. The corona electrode assembly 34 removes oil from the substrate surface and increases surface adhesion, further improving product quality. Specifically, the corona electrode assembly 34 is a corona electrode mechanism.

[0029] Reference Figure 5 , Figure 5 The diagram illustrates the structure of the thickness measuring component in this embodiment. Preferably, the coating assembly 3 further includes a thickness measuring component 35, which is positioned between the descending traction member 24 and the winding member 25. In specific applications, this embodiment uses two thickness measuring components 35. One component is positioned between the descending traction member 24 and the winding member 25 to inspect the substrate being wound up, determining whether the thickness of the coated slurry layer is uniform. The other component is positioned on the second operating table 14 to inspect the substrate after one reverse coating and one front coating, determining whether the thickness of the coated slurry layer is uniform in the intermediate stage. Specifically, the thickness measuring component 35 is a coating thickness measuring mechanism.

[0030] Reference Figure 6 , Figure 6This is a schematic diagram of the structure of the rising traction member and the correction member in the embodiment. Preferably, the traction assembly 2 further includes a correction member 26, which is disposed between the first coating member 31 and the rising traction member 22. The correction member 26 corrects the deviation of the substrate during transport, improving the accuracy of the substrate's movement and ensuring that the substrate moves along a preset path. Specifically, the correction member 26 is a correction mechanism. The horizontal traction member 23 is a guide roller traction mechanism used for traction movement of the substrate.

[0031] Preferably, the lifting traction component 22 includes a lifting frame 221, multiple guide rollers 222, and a guide roller drive component. The multiple guide rollers 222 are rotatably mounted on the lifting frame 221 at intervals along the vertical direction. One end of each guide roller 222 is fitted with a pulley. The guide roller drive component includes a guide roller drive body, a drive wheel, and a drive belt. The drive end of the guide roller drive body is connected to the drive wheel. The drive belt is sequentially wound around the drive wheel and the multiple guide rollers. The guide roller drive body is a drive motor. Thus, the drive motor drives the drive wheel to rotate, the drive wheel rotates, the drive belt rotates, the drive belt rotates, the pulleys rotate, and the pulleys rotate, which in turn rotate the multiple guide rollers. It can be understood that the substrate rises by oscillating back and forth as it passes through the multiple guide rollers 222. The multiple guide rollers 222 sequentially guide the substrate, causing it to be conveyed to the second coating mechanism 321. Specifically, the guide roller drive body is a drive motor. The structure of the descending traction member 24 is similar to that of the ascending traction member 22, and will not be described in detail here. It should be noted that the descending traction member 24 is used to guide and traction the substrate located on the upper frame 11 to the lower frame 12, so that the subsequent winding member 25 located on the lower frame 12 can be wound up.

[0032] In summary, in this embodiment, the unwinding member 21 unwinds the substrate. The substrate, under the traction of the rising traction member 22, the horizontal traction member 23, the descending traction member 24, and the winding member 25, sequentially passes through the first coating member 31, the second coating member 32, and the third coating member 33. The first coating member 31 performs the first coating operation on the substrate and forms a bottom slurry layer on the base surface. The second coating member 32 performs the second coating operation on the substrate and forms a second slurry layer on the surface of the bottom slurry layer. The third coating member 33 performs the third coating operation on the substrate and forms a third slurry layer on the surface of the second slurry layer. In this way, this embodiment can sequentially complete three coating operations on the substrate, realizing multi-functionality, improving the continuity of coating production, increasing production efficiency, reducing labor costs, and further improving the overall performance and quality of the product by coating three slurries. Furthermore, by setting up the upper rack 11 and the lower rack 12, there is no need to occupy a large amount of factory floor space, which can make full use of the height space of the factory and improve the space utilization rate.

[0033] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An integrated multi-layer coating equipment, characterized in that, include: The frame (1) includes an upper frame (11) and a lower frame (12), wherein the upper frame (11) is erected above the lower frame (12); A traction assembly (2) includes an unwinding member (21), an ascending traction member (22), a horizontal traction member (23), a descending traction member (24), and a winding member (25) arranged sequentially along the substrate conveying direction. The unwinding member (21) and the winding member (25) are respectively disposed on the lower frame (12). The ascending traction member (22) and the descending traction member (24) are both spanned across the upper frame (11) and the lower frame (12). The horizontal traction member (23) is disposed on the upper frame (11) or the lower frame (12). The coating assembly (3) includes a first coating member (31), a second coating member (32) and a third coating member (33). The first coating member (31) is disposed between the unwinding member (21) and the rising traction member (22). The second coating member (32) is disposed between the rising traction member (22) and the horizontal traction member (23). The third coating member (33) is disposed between the horizontal traction member (23) and the descending traction member (24).

2. The integrated multi-layer coating equipment according to claim 1, characterized in that, The frame (1) further includes a first operating table (13), which is adjacent to the lifting traction member (22), and the second coating member (32) is disposed on the first operating table (13).

3. The integrated multi-layer coating equipment according to claim 1, characterized in that, The frame (1) further includes a second operating table (14). The upper frame (11) includes a first upper frame (111) and a second upper frame (112). The second operating table (14) is located between the first upper frame (111) and the second upper frame (112). The third coating component (33) and the horizontal traction component (23) are respectively located on the second operating table (14). The upward traction component (22) spans the first upper frame (111) and the lower frame (12). The downward traction component (24) spans the second upper frame (112) and the lower frame (12).

4. The integrated multi-layer coating equipment according to claim 1, characterized in that, The coating assembly (3) further includes a corona assembly (34) disposed between the unwinding member (21) and the first coating member (31).

5. The integrated multi-layer coating equipment according to claim 1, characterized in that, The coating assembly (3) further includes a thickness measuring assembly (35), which is located between the descending traction member (24) and the winding member (25).

6. The integrated multi-layer coating equipment according to claim 1, characterized in that, The first coating component (31) includes a bottom coating mechanism (311) and a first oven (312). Along the substrate conveying direction, the unwinding component (21), the bottom coating mechanism (311), the first oven (312) and the rising traction component (22) are arranged in sequence.

7. The integrated multi-layer coating equipment according to claim 6, characterized in that, The first oven (312) includes an oven body and a steam heater, wherein the steam heater is connected to the oven body.

8. The integrated multilayer coating equipment according to claim 7, characterized in that, The first oven (312) also includes an electric heater, which is located in the oven body.

9. The integrated multi-layer coating equipment according to claim 6, characterized in that, There are multiple first ovens (312), which are connected in sequence and located between the bottom coating mechanism (311) and the rising traction member (22).

10. The integrated multilayer coating equipment according to claim 1, characterized in that, The traction assembly (2) further includes a correction component (26), which is disposed between the first coating component (31) and the rising traction component (22).

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