A kind of oven and coating equipment

Abstract

The present application discloses an oven and a coating device. The oven is used to dry a base material. The oven comprises: a box body having an internal space, the box body comprising a first channel and a second channel, a moving track for the base material being formed between the first channel and the second channel; an infrared heating device disposed in the internal space, the infrared radiation direction of the infrared heating device facing the moving track; an air nozzle disposed in the internal space, the air nozzle comprising an air outlet, the air outlet facing the moving track. In this way, the base material can be prevented from having quality problems such as wrinkles, dark marks, and cracks due to uneven force during the drying process, thereby improving product quality.

Description

Technical Field

[0001] The present application relates to the field of coating technology, and in particular to an oven and coating equipment. Background Art

[0002] Coating refers to the process of applying paint on the base material during the product manufacturing process to form a finished product or semi-finished product through a series of processes. During the coating process, the base material coated with paint needs to be dried. At present, hot air is used to dry the base material, which will cause uneven force on the base material, resulting in wrinkles, dark marks, cracks and other problems on the surface of the base material, affecting product quality. Utility Model Content

[0003] The present application provides an oven and a coating device, which can prevent the base material from having quality problems such as wrinkles, dark marks, and cracks due to uneven force during the drying process, thereby improving product quality.

[0004] In a first aspect, the present application provides an oven for drying a substrate material, comprising:

[0005] A box body having an internal space, the box body comprising a first channel and a second channel, wherein a moving track of the base material is formed between the first channel and the second channel;

[0006] An infrared heating device is arranged in the internal space, and the infrared radiation direction of the infrared heating device is toward the moving track;

[0007] An air nozzle is arranged in the internal space, and the air nozzle includes an air outlet, and the air outlet faces the moving track.

[0008] The above oven dries the base material through the infrared heating device and the air nozzle in its internal space. The oven uses the infrared radiation of the infrared heating device as the main heating method, which can prevent wrinkles, dark marks, cracks, etc. on the surface of the base material. The air nozzle plays an auxiliary role, and takes away the gas evaporated from the surface of the base material through a small thermal convection effect, preventing the gas from accumulating on the surface of the base material and affecting the drying effect. In this way, the thermal radiation and thermal convection methods are combined, and the base material is uniformly stressed while taking into account the drying efficiency.

[0009] In one implementation, the number of the infrared heating devices includes multiple. Providing multiple infrared heating devices can expand the infrared radiation range, thereby increasing the heating speed and improving the drying efficiency.

[0010] In one implementation, a plurality of the infrared heating devices are evenly arranged on the same inner wall of the box body, and the inner wall is opposite to the moving track. The above oven evenly arranges a plurality of infrared heating devices so that the surface of the base material can be heated evenly, further improving the drying effect.

[0011] In one implementation, the plurality of infrared heating devices include a first infrared heating device and a second infrared heating device, and at least one air nozzle is disposed between the first infrared heating device and the second infrared heating device.

[0012] In one implementation, the number of the air nozzles includes multiple ones. Providing multiple air nozzles can blow air to different positions on the surface of the substrate material, expand the blowing range, so that the gas gathered at different positions on the surface of the substrate material can be blown up, improve the volatilization efficiency of the solvent, thereby improving the drying speed and the drying efficiency.

[0013] In one implementation, the plurality of air nozzles include a first air nozzle and a second air nozzle, which are arranged on both sides of the internal space.

[0014] In one implementation, the plurality of air nozzles include a first air nozzle and a second air nozzle, and at least one infrared heating device is disposed between the first air nozzle and the second air nozzle.

[0015] In one implementation, the box body further includes an opening; a recovery device is disposed on the box body and communicated with the opening. The recovery device can process the evaporated gas, thereby realizing solvent recovery and preventing solvent waste.

[0016] In one implementation, the recovery device includes an air extraction device.

[0017] In a second aspect, the present application provides a coating device, comprising:

[0018] The first aspect or any oven of the first aspect above;

[0019] The conveying device is used for conveying the base material into the oven and conveying the dried base material out of the oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following is a brief introduction to the drawings used in describing the embodiments of the present application:

[0021] Figure 1 A schematic structural diagram of an oven provided in an embodiment of the present application is shown;

[0022] Figure 2 A schematic diagram of the structure of another oven provided in an embodiment of the present application is shown;

[0023] Figure 3A schematic diagram showing the distribution of an infrared heating device and a wind nozzle provided in an embodiment of the present application is shown;

[0024] Figure 4 A schematic structural diagram of a coating device provided in an embodiment of the present application is shown.

[0025] Description of Figure Numbers:

[0026] 10-base material; 100-oven; 110-box; 111-first channel; 112-second channel; 120-infrared heating device; 121-first infrared heating device; 122-second infrared heating device; 123-third infrared heating device; 130-nozzle; 131-first nozzle; 132-second nozzle; 140-opening; 150-recovery device; 410-oven; 421-active roller; 422-active roller; 430-platform; 440-supporting part. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. The accompanying drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other accompanying drawings and other embodiments can be obtained based on these accompanying drawings without creative work. Adjustments and improvements made without departing from the concept of the present application are all within the scope of protection of the present application.

[0028] In order to simplify the drawings, each of the drawings schematically shows only the parts related to the corresponding embodiments, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, only some structures or components are schematically depicted, and there may be more or fewer similar structures or components in reality.

[0029] In this application, unless otherwise clearly specified and limited, ordinal numbers, such as "first" and "second", are only used to distinguish and describe associated objects, and cannot be understood as indicating or implying the relative importance or order between associated objects; in addition, ordinal numbers do not represent the number of associated objects. For example, "a first infrared heating device" may include one infrared heating device, or multiple infrared heating devices. "Multiple" includes two or more, and other quantifiers are similar. "One or more" or "at least one" in multiple objects refers to any object or any combination of multiple objects, for example, "one or more of a1, a2, a3" or "at least one of a1, a2, a3" includes: "alone a1", "alone a2", "alone a3", "a1 and a2", "a1 and a3", "a2 and a3", or "a1, a2 and a3".

[0030] In the embodiments shown in the drawings, directional indications (such as up, down, left, right, front, and back, etc.) are not absolute but relative when describing the structure and movement of each component, and are not used to limit the direction of the product in actual use.

[0031] Coating refers to the process of applying a coating to a substrate material, drying the substrate material, removing the solvent from the coating, and finally rolling it up into a roll as a finished or semi-finished product. Coating can be applied to the manufacturing process of various industrial products, such as battery manufacturing, semiconductor manufacturing, automobile manufacturing, etc.

[0032] The following description is made using battery manufacturing as an example. In one implementation, coating can be used to generate positive and negative electrode sheets of a battery. In this case, the base material can be a current collector and the coating can be a battery active material. A current collector refers to a structure or part that can collect current, such as a metal foil. Battery coating refers to the process of coating a battery active material (also called a slurry) on a current collector, and then obtaining the positive and negative electrode sheets of a battery through a series of processes. In battery coating, the current collector coated with the battery active material needs to be dried to remove the solvent in the slurry so that the battery active material forms a coating on the surface of the current collector. At present, a thermal cycle system can be used to dry the base material. For example, a dry gas with a certain temperature is blown to a sheet of base material through a nozzle, and the base material is dried by thermal convection. However, there are differences in the viscosity, solid content, etc. of different slurries, and the base material has a certain thickness, so it is necessary to adjust the angle of the gas blown in, the wind force, the wind frequency, and the gas temperature. If the adjustment is unreasonable, it may cause uneven force on the surface of the substrate, resulting in wrinkles, dark marks, cracks and other problems on the surface of the base material, which will bring unstable factors to the coating, thereby affecting the quality of the positive and negative electrodes of the battery, and further affecting the quality of the battery products.

[0033] Based on this, the embodiment of the present application provides an oven that can prevent uneven force on the base material during the drying process, thereby improving product quality. It should be noted that the embodiment of the present application is described by taking battery coating as an example, and the oven or coating equipment provided in the embodiment of the present application can also be used in the manufacturing process of other industrial products. The following is an explanation with reference to the accompanying drawings.

[0034] Please refer to Figure 1 , which is a schematic diagram of the structure of an oven provided in an embodiment of the present application, the oven is used to dry the base material. Figure 1As shown, the oven includes a box body 110, an infrared heating device 120 and a nozzle 130. The box body 110 includes a first channel 111 and a second channel 112, and a moving track for the substrate material 10 is formed between the first channel 111 and the second channel 112. The substrate material 10 can enter and exit the oven 110 through the moving track. For example, the current collector coated with the battery active material enters the oven 110 through the first channel 111, and after drying, moves to the outside of the oven 110 through the second channel 112 to facilitate subsequent processes.

[0035] The box 110 also has an internal space, and the infrared heating device 120 and the air nozzle 130 are both arranged in the internal space. The infrared heating device 120 is used to emit infrared rays to the base material 10 entering the oven 110, and use the infrared radiation to dry. Compared with the practice of using thermal convection to dry in the traditional hot air system, the infrared radiation will not cause fluctuations on the surface of the base material, so it can prevent wrinkles, dark marks, cracks and the like on the surface of the base material, thereby improving the product quality. In one implementation, the infrared radiation direction of the infrared heating device 120 is toward the moving track of the base material, so that the base material can be heated evenly. The air nozzle 130 includes an air outlet, and the air outlet is toward the moving track of the base material. The infrared radiation makes the solvent in the slurry evaporate into gas, and the air outlet blows the base material 10, blowing the evaporated gas from the surface of the base material. The evaporated gas gathers on the surface of the base material, which will hinder the volatilization of the solvent, affect the efficiency of the solvent volatilization, and lead to insufficient drying, which further affects the product quality. The embodiment of the present application can improve the solvent volatilization efficiency and thus improve the drying effect by arranging a tuyere inside the oven.

[0036] The above oven dries the base material through the infrared heating device and the air nozzle in its internal space. The oven uses the infrared radiation of the infrared heating device as the main heating method, which can prevent wrinkles, dark marks, cracks, etc. on the surface of the base material. The air nozzle plays an auxiliary role, and takes away the gas evaporated from the surface of the base material through a small thermal convection effect, preventing the gas from accumulating on the surface of the base material and affecting the drying effect. In this way, the thermal radiation and thermal convection methods are combined, and the base material is uniformly stressed while taking into account the drying efficiency.

[0037] Furthermore, the number of infrared heating devices may include multiple ones. Providing multiple infrared heating devices can expand the infrared radiation range, thereby increasing the heating speed to improve the drying efficiency. In addition, as the drying time increases, a single infrared heating device may heat unevenly, for example, the heating temperature in the center of the infrared heating device is higher than the heating temperature at its periphery. Therefore, multiple infrared heating devices can be provided to provide more uniform heating. It should be noted that the embodiments of the present application do not limit the type of infrared heating device, for example, it can be an infrared heating coil, an infrared heating lamp, an infrared heating tube, etc.; when multiple infrared heating devices are provided, the multiple infrared heating devices may be the same or different.

[0038] In one implementation, the infrared heating device can be arranged on the inner wall of the oven body. Multiple infrared heating devices can be arranged on the same inner wall or on different inner walls, and can be arranged evenly or unevenly. Figure 2 , which is a schematic diagram of the structure of an oven provided in an embodiment of the present application. Figure 2 As shown, a plurality of infrared heating devices 120 are evenly arranged on the inner wall 113 of the box body 110, and the inner wall 113 is opposite to the moving track of the base material. In the above oven, by evenly arranging a plurality of infrared heating devices, the base material is heated more evenly, and the drying effect is further improved. Alternatively, a plurality of infrared heating devices 120 can also be arranged on the inner wall 114, the inner wall 115 or other inner walls of the box body 110, as long as the infrared radiation direction of these infrared heating devices is toward the moving track of the base material.

[0039] In one implementation, the number of air nozzles can also be set to multiple. Setting multiple air nozzles can blow air to different positions on the surface of the substrate material, expand the blowing range, so that the gas gathered at different positions on the surface of the substrate material can be blown up, and the volatilization efficiency of the solvent can be improved. In one implementation, the air nozzles can be set on both sides of the internal space. The two sides of the internal space can be a side close to the first channel and a side close to the second channel. Figure 2 As shown, the air nozzle 130 can be arranged on both sides of the inner wall 113. Alternatively, the air nozzle 130 can also be arranged on the inner wall 114 or the inner wall 115. When multiple air nozzles are arranged, taking two air nozzles as an example, one of them can be arranged on the inner wall 114 and the other on the inner wall 115; or, both air nozzles are arranged on both sides of the inner wall 113. Multiple air nozzles can be arranged evenly or unevenly.

[0040] Furthermore, the plurality of infrared heating devices may be arranged with nozzles spaced apart. The plurality of infrared heating devices may include, for example, a first infrared heating device and a second infrared heating device. At least one nozzle is arranged between the first infrared heating device and the second infrared heating device. Figure 3, which is a schematic diagram of the distribution of an infrared heating device and a nozzle provided in an embodiment of the present application. Figure 3 As shown, the air nozzle 130 is arranged between the first infrared heating device 121 and the second infrared heating device 122. In one implementation, multiple air nozzles can be arranged at intervals of the infrared heating devices. The multiple air nozzles include, for example, a first air nozzle and a second air nozzle. At least one infrared heating device is arranged between the first air nozzle and the second air nozzle. Figure 3 As shown, the second infrared heating device 122 and the third infrared heating device 123 are both arranged between the first air nozzle 131 and the second air nozzle 132. In addition, multiple infrared heating devices and multiple air nozzles can be arranged alternately to make the surface of the substrate material heated more evenly. The alternating arrangement can be uniform alternation or non-uniform alternation.

[0041] In addition, based on any of the above embodiments, the above oven may further include a recovery device. Figure 1 As shown, the housing 110 also includes an opening 140. The recovery device 150 is disposed on the housing 110 and is in communication with the opening 140. The recovery device 150 is used to collect the gas evaporated from the surface of the base material 10, and to recover the solvent by processing the gas, thereby saving the solvent. On the other hand, it can also prevent the gas from accumulating in the oven and causing excessive gas pressure, thereby improving safety. In one implementation, the recovery device 150 may include an exhaust device. The exhaust device extracts the gas on the surface of the base material, and the gas enters the recovery device 150 through the opening 140. The embodiment of the present application does not limit the type of the exhaust device, for example, it may be a fan.

[0042] Based on the same technical concept, an embodiment of the present application provides a coating device. The coating device includes the oven in any of the above embodiments, and also includes a conveying device. The conveying device is used to convey the substrate material to the oven, and the oven dries the substrate material. The conveying device is also used to transfer the dried substrate material out of the oven to facilitate subsequent processes. For example, the dried current collector can be conveyed by the conveying device to a winding device for winding. In one implementation, please refer to Figure 4 , which is a schematic diagram of the structure of a coating device provided in an embodiment of the present application. Figure 4 As shown, the coating device includes an oven 410, an active roller 421, a plurality of driven rollers 422, a platform 430 and a support portion 440. The oven 410 is arranged on the platform 430, and the support portion 440 is used to support the platform 430. The conveying device includes an active roller 421, a driven roller 422, and also includes a motor (not shown in the figure). The motor can drive the active roller 421 to pull the base material to move on the driven roller, so that the base material enters and exits the oven 410 through the first channel and the second channel.

[0043] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. In addition, the above embodiments can be freely combined as needed.

Claims

1. An oven, characterized in that: Used to dry base materials, including: A box body having an internal space, the box body comprising a first channel and a second channel, wherein a moving track of the base material is formed between the first channel and the second channel; An infrared heating device is arranged in the internal space, and the infrared radiation direction of the infrared heating device is toward the moving track; An air nozzle is arranged in the internal space, and the air nozzle includes an air outlet, and the air outlet faces the moving track.

2. The oven according to claim 1, characterized in that The number of the infrared heating devices includes multiple ones.

3. The oven according to claim 2, characterized in that The plurality of infrared heating devices are evenly arranged on the same inner wall of the box body, and the inner wall is opposite to the moving track.

4. The oven according to claim 3, characterized in that The plurality of infrared heating devices include a first infrared heating device and a second infrared heating device, and at least one air nozzle is arranged between the first infrared heating device and the second infrared heating device.

5. The oven according to claim 1, characterized in that The number of the air nozzles includes multiple ones.

6. The oven according to claim 5, characterized in that The plurality of air nozzles include a first air nozzle and a second air nozzle, which are arranged on both sides of the inner space.

7. The oven according to claim 5, characterized in that The plurality of air nozzles include a first air nozzle and a second air nozzle, and at least one infrared heating device is disposed between the first air nozzle and the second air nozzle.

8. The oven according to claim 1, characterized in that The box body also includes an opening; The recovery device is arranged on the box body and communicated with the opening.

9. An oven according to claim 8, characterized in that: The recovery device comprises an air extraction device.

10. A coating device, characterized in that: include: The oven according to any one of claims 1 to 9; The conveying device is used for conveying the base material into the oven and conveying the dried base material out of the oven.

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