Internal winding type double-sided extrusion coating machine

Abstract

The utility model discloses an internal winding type double-sided extrusion coating machine, and relates to the technical field of battery coating, the internal winding type double-sided extrusion coating machine comprises an unwinding coating device, a drying device and a winding coating device which are arranged in sequence; the unwinding and coating equipment comprises an unwinding device and a first surface coating device; the drying equipment comprises a lower-layer drying oven and an upper-layer drying oven arranged above the lower-layer drying oven; an upper turn-back device is arranged on one side of the upper drying oven; one side of the lower drying oven is provided with a lower turn-back device; the winding and coating equipment comprises a winding device and a second surface coating device; a base material released by the unwinding device sequentially passes through the first surface coating device, the upper-layer drying oven, the upper-layer turn-back device, the upper-layer drying oven, the second surface coating device, the lower-layer drying oven, the lower-layer turn-back device and the lower-layer drying oven and then is wound by the winding device. The coating efficiency is improved, meanwhile, the occupied length of a plant is reduced, and the convenience of material transfer is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery coating, and particularly to an inner-wound double-sided extrusion coater. Background Art

[0002] The main principle of the coating technology is to effectively coat the positive and negative electrode materials of the battery onto the electrode sheet and obtain high-quality electrodes. Therefore, the quality of the coating directly affects the performance and lifespan of the battery. In the battery coater industry, currently, single-sided coaters and folded-back double-sided coaters are mainly used.

[0003] The single-sided extrusion coater coats and dries one side of the substrate and then winds it up, and then repeats the work of coating the first side to coat the second side. It has disadvantages such as low coating efficiency, high energy consumption, and high labor intensity. The folded-back double-sided coater is that after the substrate is unwound from the unwind, it enters the first-side head to coat the first side. After drying in the first-layer oven, it exits the oven and enters the second-side head to coat the second side, and then enters the second-layer oven for drying and then winds up. The unwind and windup of this double-sided folded-back coater are on the same side, which is inconvenient for material transfer. At the same time, it also has disadvantages such as a long oven and low drying efficiency, and the equipment occupies a large space in the factory building.

[0004] It can be seen that there is an urgent need to provide a new coater design that can improve efficiency, save energy, and reduce space occupation. Utility Model Content

[0005] In view of this, the purpose of the present application is to provide an inner-wound double-sided extrusion coater that can improve efficiency, save energy, and reduce space occupation.

[0006] To achieve the above technical purpose, the present application provides an inner-wound double-sided extrusion coater, including a unwind coating device, a drying device, and a windup coating device arranged in sequence;

[0007] The unwind coating device includes an unwind device and a first-side coating device;

[0008] The drying device includes a lower-layer oven and an upper-layer oven arranged above the lower-layer oven;

[0009] An upper-layer folding-back device is provided on one side of the upper-layer oven;

[0010] A lower-layer folding-back device is provided on one side of the lower-layer oven;

[0011] The windup coating device includes a windup device and a second-side coating device;

[0012] The base material released by the unwinding device sequentially passes through the first-side coating device, the upper oven, the upper folding device, the upper oven, the second-side coating device, the lower oven, the lower folding device, and the lower oven, and then is wound up by the winding device.

[0013] Further, the unwinding and coating equipment further includes a first traction device;

[0014] The first traction device is arranged between the first-side coating device and the upper oven, and is used for traction of the base material input into the upper oven and the base material output from the upper oven.

[0015] Further, the first traction device is arranged above the unwinding device and is closer to the upper oven relative to the unwinding device.

[0016] Further, the first-side coating device is arranged above the unwinding device and is closer to the upper oven relative to the unwinding device.

[0017] Further, the unwinding and coating equipment further includes a first elevated platform;

[0018] The first-side coating device and the first traction device are arranged on the first elevated platform.

[0019] Further, the drying equipment further includes a second elevated platform;

[0020] The upper oven is installed on the second elevated platform.

[0021] Further, the winding and coating equipment further includes a second traction device;

[0022] The second traction device is arranged between the second-side coating device and the lower oven, and is used for traction of the base material input into the lower oven and the base material output from the lower oven.

[0023] Further, there is a gap space between the upper oven and the lower oven for the base material output from the upper oven to pass through.

[0024] From the above technical solutions, it can be seen that the internally wound double-sided extrusion coater designed in this application has the following beneficial effects:

[0025] 1. By respectively arranging an upper folding device and a lower folding device on one side of the upper oven and the lower oven, the base material can enter the upper oven and the lower oven respectively for a second time, thereby effectively improving the drying efficiency and reducing the length of the oven.

[0026] 2. The upper oven and the lower oven are arranged vertically. At the same time, the unwinding device and the first side coating device are arranged on one side of the upper oven and the lower oven, while the winding device and the second side coating device are arranged on the other side of the upper oven and the lower oven. The base material released by the unwinding device passes through the first side coating device, the upper oven, the upper turning device, the upper oven, the second side coating device, the lower oven, the lower turning device, and the lower oven in sequence and is then wound by the winding device. With this layout and tape running design, the coating efficiency is improved while reducing the occupation of the factory building length, the convenience of material transfer is enhanced, and the production process is fully automated and continuous. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic structural diagram of an inner-wound double-sided extrusion coater provided in the present application;

[0029] In the figure: 100, unwinding and coating equipment; 101, unwinding device; 102, first side coating device; 103, first traction device; 104, first high platform; 200, drying equipment; 201, upper oven; 202, upper turning device; 203, lower oven; 204, lower turning device; 205, second high platform; 300, winding and coating equipment; 301, winding device; 302, second side coating device; 303, second traction device; 304, third high platform; 1, guiding roller. Detailed Embodiments

[0030] The following will clearly and completely describe the technical solutions of the embodiments of the present application with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the embodiments of the present application.

[0031] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0032] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a replaceable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0033] The embodiments of the present application disclose an inner-wound double-sided extrusion coater.

[0034] Please refer to Figure 1 , an embodiment of an inner-wound double-sided extrusion coater provided in the embodiments of the present application includes:

[0035] A unwind coating device 100, a drying device 200, and a rewind coating device 300 arranged in sequence. As Figure 1 shown, taking the area where the drying device 200 is arranged as the middle area as an example, the area where the unwind coating device 100 is located is the right area (head area), and the area where the rewind coating device 300 is located is the left area (tail area).

[0036] The unwind coating device 100 includes an unwind device 101 and a first-side coating device 102.

[0037] The drying device 200 includes a lower oven 203 and an upper oven 201 disposed above the lower oven 203; an upper turning device 202 is provided on one side of the upper oven 201 for turning back the substrate that first passes through the upper oven 201 and then re-entering the upper oven 201 to extend the drying time; a lower turning device 204 is provided on one side of the lower oven 203 for turning back the substrate that passes through the lower oven 203 and then re-entering the lower oven 203 to extend the drying time; generally speaking, both the upper oven 201 and the lower oven 203 of the present application are of an inner winding design, enabling the substrate to enter the upper oven 201 and the lower oven 203 twice respectively, thereby effectively improving the drying efficiency and reducing the length of the oven.

[0038] The winding and coating device 300 includes a winding device 301 and a second-side coating device 302; the substrate released by the unwinding device 101 sequentially passes through the first-side coating device 102, the upper oven 201, the upper turning device 202, the upper oven 201, the second-side coating device 302, the lower oven 203, the lower turning device 204, and the lower oven 203, and then is wound by the winding device 301. With the above layout and tape-running design, the coating efficiency is improved while reducing the occupation of the factory building length, the convenience of material transfer is improved, and the production process realizes full automation and continuity.

[0039] The inner winding type double-sided extrusion coater designed in the present application can shorten the oven length by 50% under the same coating speed, and the overall equipment length is shortened by more than 40%, making the material transfer more convenient and also saving energy consumption.

[0040] The above is the first embodiment of an inner winding type double-sided extrusion coater provided by the present application. The following is the second embodiment of an inner winding type double-sided extrusion coater provided by the present application. For details, please refer to Figure 1 。

[0041] Based on the solution of the first embodiment above:

[0042] Further, the unwinding and coating device 100 further includes a first traction device 103; the first traction device 103 is disposed between the first-side coating device 102 and the upper oven 201 for traction of the substrate input into the upper oven 201 and the substrate output from the upper oven 201 to improve the stability of substrate conveyance.

[0043] Further, since the upper oven 201 is set at a high position, in order to better cooperate with the upper oven 201, the first traction device 103 is disposed above the unwinding device to be closer to the upper oven 201 relative to the unwinding device, while the unwinding device 101 can be set on the ground.

[0044] Further, to better cooperate with the upper oven 201, the first surface coating device 102 is disposed above the unwinding device without limitation.

[0045] Further, to facilitate the elevation setting of the first traction device 103 and the first surface coating device 102, the unwinding and coating equipment 100 further includes a first elevated platform 104, and the first surface coating device 102 and the first traction device 103 are disposed on the first elevated platform 104.

[0046] Further, to facilitate the elevation setting of the upper oven 201, the drying equipment 200 further includes a second elevated platform 205, the upper oven 201 is installed on the second elevated platform 205, while the lower oven 203 is disposed on the ground and at a position below the bottom of the tabletop of the second elevated platform 205.

[0047] Further, the rewinding and coating equipment 300 further includes a second traction device 303; the second traction device 303 is disposed between the second surface coating device 302 and the lower oven 203, and is used to traction the substrate input into the lower oven 203 and the substrate output from the lower oven 203, so as to improve the stability of the substrate transportation.

[0048] Further, there is a gap space between the upper oven 201 and the lower oven 203 for the substrate output from the upper oven 201 to pass through, that is, the substrate coming out of the upper oven 201 passes between the upper oven 201 and the lower oven 203, and then winds around to the second surface coating device 302 for coating operation on the other side. To facilitate the substrate to bypass between the upper oven 201 and the lower oven 203, the bottom of the tabletop of the second elevated platform 205 can be set to the guide roller 1.

[0049] Since the lower oven 203 is disposed at the lower position (disposed on the ground), therefore, the rewinding device 301, the second surface coating device 302, and the second traction device 303 can all be disposed on the ground. Especially for the second traction device 303, no elevation treatment is required, and it is ensured that the substrate can be input into the lower oven 203 or output from the lower oven 203 flat. However, to facilitate the substrate to wind back to the second surface coating device 302, the rewinding and coating equipment 300 further includes a third elevated platform 304, and a guide roller 1 is also installed on the third elevated platform 304 to guide the substrate movement; correspondingly, a guide roller 1 is also installed on the first elevated platform.

[0050] Working principle:

[0051] The base material is unwound by the unwinding device 101, passes through the guiding roller 1 on the first high platform 104 and enters the first-side coating device 102 for coating. Among them, the coating head is a constant-speed and constant-quantity coating head device, which can perform coating according to the preset coating parameters. After coating, it enters the upper oven 201 for drying the first side. After passing through the upper turning device 202, it enters the upper oven 201 again for drying. After drying, it passes through the first traction device 103, the guiding roller 1 on the second high platform 205 and the third high platform 304 and enters the second-side coating device 302 for second-side coating. After coating, it enters the lower oven 203 for drying the second side. After passing through the lower turning device 204, it enters the lower oven 203 again for drying. After drying, it enters the winding device 301 through the second traction device 303 for winding.

[0052] The above has introduced in detail an internal winding type double-sided extrusion coater provided by the present application. For those of ordinary skill in the art, according to the idea of the embodiments of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. An inner winding double-sided extrusion coating machine, characterized in that: It comprises an unwinding coating device (100), a drying device (200) and a winding coating device (300) which are arranged in sequence; The unwinding coating device (100) comprises an unwinding device (101) and a first-side coating device (102); The drying equipment (200) comprises a lower oven (203) and an upper oven (201) arranged above the lower oven (203); An upper layer folding device (202) is provided on one side of the upper layer oven (201); A lower layer folding device (204) is provided on one side of the lower layer oven (203); The winding coating device (300) comprises a winding device (301) and a second-side coating device (302); The substrate released by the unwinding device (101) passes through the first surface coating device (102), the upper oven (201), the upper folding device (202), the upper oven (201), the second surface coating device (302), the lower oven (203), the lower folding device (204) and the lower oven (203) in sequence, and is then wound up by the winding device (301).

2. The inner winding double-sided extrusion coating machine according to claim 1, characterized in that: The unwinding coating device (100) further comprises a first traction device (103); The first traction device (103) is arranged between the first surface coating device (102) and the upper oven (201), and is used to traction the substrate input into the upper oven (201) and the substrate output from the upper oven (201).

3. The inner winding double-sided extrusion coating machine according to claim 2, characterized in that: The first traction device (103) is arranged above the unwinding device so as to be closer to the upper oven (201) than the unwinding device.

4. The inner winding double-sided extrusion coating machine according to claim 3, characterized in that: The first-side coating device (102) is arranged above the unwinding device so as to be closer to the upper oven (201) than the unwinding device.

5. The inner winding double-sided extrusion coating machine according to claim 4, characterized in that: The unwinding coating device (100) further comprises a first elevated platform (104); The first surface coating device (102) and the first traction device (103) are arranged on the first elevated platform (104).

6. The inner winding double-sided extrusion coating machine according to claim 4, characterized in that: The drying device (200) further comprises a second elevated platform (205); The upper oven (201) is installed on the second elevated platform (205).

7. The inner winding double-sided extrusion coating machine according to claim 1, characterized in that: The roll-to-roll coating device (300) further comprises a second traction device (303); The second traction device (303) is arranged between the second surface coating device (302) and the lower oven (203), and is used to pull the substrate input into the lower oven (203) and the substrate output from the lower oven (203).

8. The inner winding double-sided extrusion coating machine according to claim 1, characterized in that: There is a gap space between the upper oven (201) and the lower oven (203) for the substrate output from the upper oven (201) to pass through.

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