Double-sided coating equipment and coating production line

Abstract

The utility model belongs to the technical field of coating, and discloses double-side coating equipment and a coating production line, the coating equipment comprises a rack, a first side coating unit and a second side coating unit, the first side coating unit and the second side coating unit are arranged in the rack, the first side coating unit can coat a first side of a base material, and the second side coating unit can coat a second side of the base material. The second surface coating unit can be used for coating the second surface of the base material; the coating equipment not only can realize double-sided coating, but also can coat any surface of a base material according to actual requirements; the double-side coating equipment can coat the front side and the back side of a base material at a time, space and time are saved, and equipment cost is reduced; the coating production line comprises the double-side coating equipment, unwinding equipment, drying equipment and winding equipment, the front side and the back side of a base material can be coated at a time, a finished product can be directly wound after the base material is dried by a drying oven, space and time are saved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coating, in particular to a double-sided coating device and a production line. Background Art

[0002] In the lithium battery coating process, the process of carbon coating of copper foil and aluminum foil has been added. This can effectively reduce the internal resistance of the battery, improve the consistency of the battery pack, and improve the bonding adhesion between the active material and the current collector.

[0003] In the past, existing carbon coating equipment mainly used micro-concave roller coating. After coating one side, it was dried in an oven, then coated on the second side, and then rolled into the finished product after passing through the oven. This type of equipment occupies a large area, has high equipment costs, and is relatively inefficient. Currently, there are also some double-sided coating equipment on the market that can coat both sides simultaneously, including a gravure roller, a front coating mechanism, and a back coating mechanism arranged in sequence; the gravure roller is used to absorb the slurry and coat it on the diaphragm, and the gravure roller is arranged above the front of the diaphragm; the back coating mechanism includes a wire rod and adsorption rollers arranged at both ends of the wire rod, the wire rod is arranged above the back of the diaphragm, and the adsorption roller is used to keep the diaphragm close to the wire rod. However, the above solution cannot achieve convenient switching between single-sided or double-sided coating, and the application scenarios are relatively simple, resulting in high equipment costs. Utility Model Content

[0004] The purpose of the utility model is to provide a double-sided coating device, which can coat the front and back sides of a substrate at one time, and has a simple device structure and a reasonable internal layout, saves space and time, and reduces equipment costs.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A double-sided coating device includes a frame and a first-side coating unit and a second-side coating unit arranged on the frame, wherein the first-side coating unit is capable of coating the first side of a substrate to be coated, and the second-side coating unit is capable of coating the second side of the substrate; the first-side coating unit includes a first coating device and at least one first adjusting roller; the first coating device is capable of coating the first side of the substrate, and the first adjusting roller can selectively attach or separate the first side of the substrate from the first coating device; the second-side coating unit includes a second coating device and at least one second adjusting roller, the second coating device is capable of coating the second side of the substrate, and the second adjusting roller can selectively attach or separate the second side of the substrate from the second coating device.

[0007] Preferably, at least two first adjustment rollers are provided, and / or at least two second adjustment rollers are provided.

[0008] Preferably, a fixed roller is further included, which is rotatably connected to the frame and is used to regulate the stroke and direction of the substrate in the frame.

[0009] Preferably, a guide roller is further included, which is arranged at the feed port of the frame and is used to guide the substrate into the feeding direction of the coating device.

[0010] Preferably, a traction roller is further included, which is arranged behind the guide roller along the feeding direction and is used to pull the substrate into the coating device.

[0011] Preferably, the first-side coating unit and the second-side coating unit are arranged alternately in a vertical direction, and the substrate is fed in a U-shaped manner at the first-side coating unit and the second-side coating unit.

[0012] Preferably, the first adjustment roller includes: a first driving member, which is fixed to the frame, and a first roller, which is rotatably arranged at the output end of the first driving member; the first roller is driven by the first driving member to move the substrate and the first coating device to fit or separate them.

[0013] Preferably, the second adjustment roller includes: a second driving member, which is fixed to the frame, and a second roller, which is rotatably arranged at the output end of the second driving member; the second roller is driven by the second driving member to lift and lower, so as to fit or separate the substrate and the second coating device.

[0014] Preferably, the first coating device and the second coating device are both wire rod coating devices.

[0015] Another object of the present invention is to provide a coating production line that can coat both sides of a substrate at one time and directly roll up the finished product after drying in an oven, thus saving space and time.

[0016] The coating production line includes an unwinding device, a drying device, a rear-drive device and a winding device, and also includes the above-mentioned double-sided coating device; along the feeding direction of the substrate, the unwinding device is arranged upstream of the coating device, and is used to unwind the substrate to be coated; the drying device is arranged downstream of the coating device, and at least two are provided, for drying the coated substrate; the winding device is arranged downstream of the rear-drive device, and is used to wind up the dried substrate.

[0017] Beneficial effects of the utility model:

[0018] The double-sided coating device disclosed in the utility model comprises a frame and a first-side coating unit and a second-side coating unit arranged in the frame. The first-side coating unit can selectively coat the first side of a substrate, and the second-side coating unit can selectively coat the second side of the substrate, thereby not only realizing double-sided coating, but also coating any side of the substrate according to actual needs; the double-sided coating device can coat both the front and back sides of the substrate at one time, saving space and time and reducing equipment costs.

[0019] The utility model also discloses a coating production line, including the above-mentioned double-sided coating equipment, unwinding equipment, drying equipment, rear drive equipment and winding equipment, which can coat both sides of the substrate at one time and can directly wind up the finished product after drying in an oven, saving space and time and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structural layout of the double-sided coating equipment of the first embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the structural layout of the double-sided coating equipment of the second embodiment of the present utility model;

[0022] Figure 3 yes Figure 2 A magnified view of the part in the middle circle.

[0023] In the picture:

[0024] 1. Frame;

[0025] 2. First surface coating unit; 21. First coating device; 22. First adjustment roller; 221. First driving member; 222. First roller; 223. First adjustment hand wheel;

[0026] 3. Second side coating unit; 31. Second coating device; 32. Second adjustment roller; 321. Second driving member; 322. Second roller; 323. Second adjustment hand wheel;

[0027] 4. Fixed roller; 5. Guide roller; 6. Traction roller;

[0028] 100. Base material. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Example 1:

[0034] The utility model discloses a double-sided coating device, such as Figure 1As shown, it includes a frame 1 and a first-side coating unit 2 and a second-side coating unit 3 arranged in the frame 1. The first-side coating unit 2 can coat the first side of the substrate 100 to be coated, and the second-side coating unit 3 can coat the second side of the substrate 100; the first-side coating unit 2 includes a first coating device 21 and at least one first adjustment roller 22; the first coating device 21 can coat the first side of the substrate 100, and the first adjustment roller 22 can selectively fit or separate the first side of the substrate 100 from the first coating device 21; the second-side coating unit 3 includes a second coating device 31 and at least one second adjustment roller 32, the second coating device 31 can coat the second side of the substrate 100, and the second adjustment roller 32 can selectively fit or separate the second side of the substrate 100 from the second coating device 31. It can be understood that by setting the first adjustment roller 22 and the second adjustment roller 32 to cooperate with the first coating device 21 and the second coating device 31 respectively, not only can double-sided coating of the substrate 100 be achieved, but also any side of the substrate 100 can be coated according to actual needs. Under conditions where double-sided coating is required, the double-sided coating equipment can coat both sides of the substrate 100 at one time, thereby saving space and time and reducing equipment costs.

[0035] Continue to refer Figure 1 , Optionally, at least two first adjustment rollers 22 are provided. When two are provided, the two first adjustment rollers 22 are respectively provided on both sides of the first coating device 21. By simultaneously raising or lowering, the first side of the substrate 100 can always be horizontally attached to or separated from the first coating device 21, thereby improving the coating effect of the first coating device 21. At the same time, it is convenient to cooperate with the second adjustment roller 32 to guide the direction of the substrate 100 in the double-sided coating equipment, thereby reducing the number of other types of rollers provided. The first adjustment rollers 22 can also be set to other numbers, such as 4, to adapt to different lengths of travel of the substrate 100, provide effective support for the substrate 100, prevent the substrate 100 from having a poor coating effect due to a long travel due to gravity, and at the same time reduce the tension of the tensioning force to avoid damage caused by excessive pulling of the substrate 100. Optionally, a single second adjustment roller 32 is provided, and when the second adjustment roller 32 is lowered, the second side of the substrate 100 is brought into contact with the second coating device 31 for coating. In conjunction with rollers in subsequent equipment, the substrate 100 can also remain horizontal when the second coating device 31 is in the coating state, thereby improving the coating effect. In other embodiments, two second adjustment rollers 32 can also be provided, with the two second adjustment rollers 32 being respectively provided on both sides of the second coating device 31. By simultaneously raising or lowering the second side of the substrate 100, the second side of the substrate 100 can always be horizontally attached to or separated from the first coating device 21, thereby improving the coating effect of the first coating device 21.

[0036] In this embodiment, if Figure 1As shown, the double-sided coating device further includes a fixed roller 4, a guide roller 5, and a pulling roller 6, wherein the fixed roller 4 is rotatably connected to the frame 1, and the number of fixed rollers 4 is adaptively set to regulate the stroke and direction of the substrate 100 in the frame 1. The guide roller 5 is arranged at the feed port of the frame 1 and is rotatably connected to the frame 1. The guide roller 5 is used to guide the substrate 100 into the feeding direction of the coating device. The pulling roller 6 is arranged behind the guide roller 5 along the feeding direction and is rotatably connected to the frame 1 to pull the substrate 100 into the coating device. In some specific embodiments, two fixed rollers 4 are provided, which are respectively arranged behind the pulling roller 6 and in front of the second adjustment roller 32 along the feeding direction; the guide roller 5 and the pulling roller 6 are arranged at the bottom of the double-sided coating device and are located below the first-side coating unit 2. The substrate 100 is guided between the first-side coating unit 2 and the pulling roller 6 through the two fixed rollers 4. It can be understood that such a setting can ensure that the coated substrate 100 remains stable during the transmission process, prevent the coating quality from being affected by material shaking or deviation, and effectively prevent the material from being deformed due to excessive tension, thereby ensuring the flatness and consistency of the coated product; setting a reasonable number of rollers can ensure the friction and rotational movement through their surfaces, guide the coated substrate 100 to advance along a predetermined path, ensure the continuity and stability of the coating process, and reduce the complexity of the equipment structure and reduce the equipment cost.

[0037] Please continue to refer to Figure 1 The first-side coating unit 2 and the second-side coating unit 3 are arranged alternately in the vertical direction, and the substrate 100 is fed in a U-shaped manner at the first-side coating unit 2 and the second-side coating unit 3. It can be understood that such an arrangement does not change the final feeding direction of the substrate 100 on the one hand, and on the other hand can efficiently utilize the space in the double-sided coating equipment and reduce the space occupied by the equipment.

[0038] In this embodiment, if Figure 1As shown, the first adjustment roller 22 includes: a first driving member 221, which is fixedly mounted on the frame 1; a first roller 222, which is rotatably mounted at the output end of the first driving member 221; the first roller 222 is driven by the first driving member 221 to move up and down or rotate around the driving axis to attach or separate the substrate 100 from the first coating device 21; the second adjustment roller 32 includes: a second driving member 321, which is fixedly mounted on the frame 1; a second roller 322, which is rotatably mounted at the output end of the second driving member 321; the second roller 322 is driven by the second driving member 321 to move up and down to attach or separate the substrate 100 from the second coating device 31. It is understood that the first driving member 221 can be driven by any of a pneumatic cylinder, an electric telescopic rod, or a rack-and-pinion mechanism; and the second driving member 321 can be driven by any of a pneumatic cylinder, an electric telescopic rod, or a rack-and-pinion mechanism.

[0039] In some embodiments, the first coating device 21 and the second coating device 31 are both wire rod coating devices. It is understood that the main advantages of the wire rod coating device include high precision, easy operation, versatility and high energy efficiency. The wire rod coating device is a prior art, and its structure and principle are not described in detail. Specifically, the wire rod coating can achieve high-precision coating. The wire rod coating device has the advantages of compact structure, simple operation, stable equipment operation and long service life. In addition, the wire rod coating also performs well in application and is suitable for ultra-thin films, low-viscosity sample coating and multi-layer coating experiments.

[0040] The present invention also discloses a coating production line comprising the aforementioned double-sided coating apparatus, an unwinding apparatus, a drying apparatus, a rear-drive apparatus, and a rewinding apparatus; wherein, along the feeding direction of the coated substrate 100, the unwinding apparatus is disposed at the front end of the coating apparatus for unwinding the substrate 100 to be coated; the drying apparatus is disposed at the rear end of the coating apparatus, and at least two drying apparatuses are disposed at the rear end of the coating apparatus for drying the coated substrate 100; and the rewinding apparatus is disposed at the rear end of the rear-drive apparatus for rewinding the dried substrate 100. It is understood that the double-sided coating apparatus, the unwinding apparatus, the drying apparatus, the rear-drive apparatus, and the rewinding apparatus each include independent traction forces, and each apparatus is provided with a sensor roller that senses the tension of a particular apparatus and then controls the traction speed of the traction roller 6, thereby adjusting the tension level. The sensor roller can be configured as at least one of the fixed roller 4, the traction roller 6, and the guide roller 5, thereby achieving coordinated traction force adjustment between each apparatus, ensuring continuity and stability in the coating process of the substrate 100. In other embodiments, a rear drive device is further provided at the rear end of the drying device along the feeding direction. The rear drive device is provided at the front end of the winding device to provide power traction for feeding the substrate 100 and direction guidance before winding, so that the winding is smoother.

[0041] Example 2:

[0042] The structure of the double-sided coating equipment and production line of this embodiment is substantially the same as that of the double-sided coating equipment and production line of embodiment 1, except that Figure 2 and Figure 3 As shown, in this embodiment, the first adjustment roller 22 further includes a first adjustment handwheel 223, which can fine-tune the height of the first roller 222, that is, adjust the position of the first roller 222 at the output end of the first driving member 221. The second adjustment roller 32 further includes a second adjustment handwheel 323, which can fine-tune the height of the second roller 322, that is, adjust the position of the second roller 322 at the output end of the second driving member 321. It can be understood that the provision of the first adjustment handwheel 223 and the second adjustment handwheel 323 can not only adjust the coating thickness of the first coating device 21 or the second coating device 31, but also can compensate for the accuracy of the lifting and lowering of the first roller 222 or the second roller 322 by fine-tuning with the help of the first adjustment handwheel 223 and the second adjustment handwheel 323 when the first adjustment roller 222 or the second adjustment roller 322 suffers mechanical fatigue due to long-term use, thereby extending the service life of the equipment.

[0043] The double-sided coating equipment disclosed in the present invention can not only realize double-sided coating, but also can coat any side of the substrate according to actual needs; the double-sided coating equipment can coat both sides of the substrate at one time, saving space and time, and reducing equipment costs. The coating production line disclosed in the present invention includes the above-mentioned double-sided coating equipment, unwinding equipment, drying equipment, rear drive equipment, and winding equipment. It can coat both sides of the substrate at one time, and can directly wind the finished product after drying in an oven, saving space and time, and reducing production costs.

[0044] 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. Double-sided coating equipment, characterized in that, The invention comprises a frame (1), and a first-side coating unit (2) and a second-side coating unit (3) arranged on the frame (1), wherein the first-side coating unit (2) is capable of coating the first side of a substrate to be coated, and the second-side coating unit (3) is capable of coating the second side of the substrate; The first-side coating unit (2) comprises a first coating device (21) and at least one first adjustment roller (22); the first coating device (21) is capable of coating the first side of the substrate, and the first adjustment roller (22) can selectively attach or separate the first side of the substrate from the first coating device (21); The second-side coating unit (3) comprises a second coating device (31) and at least one second adjustment roller (32), wherein the second coating device (31) is capable of coating the second side of the substrate, and the second adjustment roller (32) can selectively attach or separate the second side of the substrate from the second coating device (31).

2. The double-sided coating device according to claim 1, characterized in that At least two first adjustment rollers (22) are provided, and / or at least two second adjustment rollers are provided.

3. The double-sided coating device according to claim 1, characterized in that It also includes a fixed roller (4), which is rotatably connected to the frame and is used to regulate the stroke and direction of the substrate in the frame (1).

4. The double-sided coating device according to claim 1, characterized in that It also includes a guide roller (5), which is arranged at the feed port of the frame (1) and is used to guide the substrate into the feeding direction of the coating device.

5. The double-sided coating device according to claim 4, characterized in that: The invention also comprises a pulling roller (6), which is arranged behind the guide roller (5) along the feeding direction and is used for pulling the substrate into the coating device.

6. The double-sided coating device according to claim 1, characterized in that The first-side coating unit (2) and the second-side coating unit (3) are arranged alternately in a vertical direction, and the substrate is fed in a U-shaped manner at the first-side coating unit (2) and the second-side coating unit (3).

7. The double-sided coating device according to claim 1, characterized in that The first adjusting roller (22) comprises: A first driving member (221), wherein the first driving member (221) is fixedly arranged on the frame (1), a first roller (222), the first roller (222) being rotatably disposed at an output end of the first driving member (221); The first roller (222) is driven by the first driving member (221) to move and is used to attach or separate the substrate from the first coating device (21).

8. The double-sided coating device according to claim 1, characterized in that: The second adjustment roller (32) comprises: A second driving member (321), wherein the second driving member (321) is fixedly arranged on the frame (1), a second roller (322), the second roller (322) being rotatably disposed at an output end of the second driving member (321); The second roller (322) is driven by the second driving member (321) to perform a lifting action, and is used to attach or separate the substrate and the second coating device (31).

9. The double-sided coating device according to any one of claims 1 to 8, characterized in that: The first coating device (21) and the second coating device (31) are both wire-bar coating devices.

10. A coating production line comprising an unwinding device, a drying device and a winding device, characterized in that: Also includes the double-sided coating device according to any one of claims 1 to 9; The unwinding device is arranged upstream of the coating device along the feeding direction of the substrate and is used to unwind the substrate to be coated; The drying device is arranged downstream of the coating device and is used to dry the substrate after coating; The winding device is arranged downstream of the rear drive device and is used for winding the dried substrate.

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