Metal foil surface oil stain treatment method and treatment equipment

Abstract

The invention relates to a metal foil surface oil stain treatment method and equipment, and the method comprises the steps: obtaining the infrared reflection information of the surface of a metal foil, and determining the oil stain position of the metal foil based on the infrared reflection information; and when the greasy dirt position of the metal foil moves to the corona device, the corona device corresponding to the greasy dirt position of the metal foil is controlled to be started. According to the invention, the range and time of corona treatment are reduced, so that the generation amount of ozone is reduced, and the potential influence of ozone on the body health of workers is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of treating oil stains on metal foil surfaces, and in particular to a method and equipment for treating oil stains on metal foil surfaces. Background Art

[0002] In the field of metal foil surface treatment (such as carbon-coated aluminum foil), a layer of functional material (such as a carbon coating or safety coating) is applied to the aluminum foil surface through coating technology. This requires certain surface tension requirements for the aluminum foil. Rolling oil is used in the aluminum foil production process. Although there are oil removal processes in the aluminum foil production process, residual rolling oil is difficult to completely remove. Small amounts of residual rolling oil will be randomly distributed on the surface of the finished aluminum foil, resulting in coating defects and gaps.

[0003] The current common method to remove rolling oil residue is to use corona discharge on the entire aluminum foil, decomposing the rolling oil residue through high-voltage discharge. However, ozone is generated during the corona process, and workers will feel unwell if they work in an ozone environment for a long time. Summary of the Invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a method and equipment for treating oil stains on the surface of a metal foil.

[0005] In a first aspect, the present application provides a method for treating oil stains on the surface of a metal foil, comprising:

[0006] Obtaining infrared reflection information from the surface of the metal foil, and determining the location of the oil stain on the metal foil based on the infrared reflection information;

[0007] When the oil stain position of the metal foil moves to the corona device, the corona device corresponding to the oil stain position of the metal foil is controlled to start.

[0008] In some embodiments, obtaining infrared reflection information from the surface of the metal foil and determining the location of the oil stain on the metal foil based on the infrared reflection information includes:

[0009] The infrared light source is controlled to irradiate the surface of the metal foil, and the infrared reflection information is obtained through the infrared collection device. The position where the reflection intensity in the infrared reflection information meets the preset conditions is determined as the oil stain position of the metal foil.

[0010] In some embodiments, when the oil stain position of the metal foil moves to the corona device, controlling the corona device corresponding to the oil stain position of the metal foil to start includes:

[0011] When the oil stain position of the metal foil moves to the first corona device, the first corona device is controlled to start;

[0012] The corona range of the first corona device covers the width of the metal foil.

[0013] In some embodiments, when the oil stain position of the metal foil moves to the corona device, controlling the corona device corresponding to the oil stain position of the metal foil to start includes:

[0014] When the oil stain position of the metal foil moves to the second corona device, the corona electrode corresponding to the oil stain position in the second corona device is controlled to start;

[0015] The second corona device includes a plurality of corona electrodes, which are sequentially arranged along the width direction of the metal foil.

[0016] In some embodiments, when the oil stain position of the metal foil moves to the corona device, controlling the corona device corresponding to the oil stain position of the metal foil to start includes:

[0017] The time it takes for the oil stain position of the metal foil to move to the corona device is determined based on the distance between the infrared reflection information collection position and the corona device, as well as the movement speed of the metal foil. When the oil stain position of the metal foil moves to the corona device, the corona device corresponding to the oil stain position of the metal foil is controlled to start.

[0018] In some embodiments, further comprising:

[0019] The corona time of the corona device corresponding to the oil stain position of the metal foil is controlled according to the length of the oil stain position along the moving direction of the metal foil and the moving speed of the metal foil.

[0020] In some embodiments, after controlling the corona device corresponding to the oil stain position on the metal foil to start and corona treat the oil stain on the metal foil, the method further includes:

[0021] The infrared reflection information of the metal foil surface after corona treatment is collected, and the oil removal effect of the metal foil is detected based on the infrared reflection information.

[0022] In some embodiments, further comprising:

[0023] Based on the fact that the oil removal effect is residual oil, the corona power of the corona device is increased.

[0024] In a second aspect, the present application further provides a metal foil surface oil treatment device, comprising:

[0025] Metal foil conveying device, first infrared device, corona device and control system;

[0026] The metal foil conveying device is used to convey the metal foil;

[0027] The first infrared device is arranged on the first side and / or the second side of the metal foil, and is used to collect infrared reflection information from the surface of the metal foil;

[0028] The corona device is arranged on the first side and / or the second side of the metal foil and is located downstream of the first infrared device along the moving direction of the metal foil;

[0029] The control system is electrically connected to the first infrared device and the corona device respectively, and is used to determine the oil stain position of the metal foil based on infrared reflection information, and move from the oil stain position of the metal foil to the corona device to control the corona device corresponding to the oil stain position of the metal foil to start.

[0030] In some embodiments, a second infrared device is further included; the second infrared device is located downstream of the corona device along the direction of movement of the metal foil, and is used to collect infrared reflection information of the surface of the metal foil after corona treatment, and is electrically connected to the control system; the control system is used to detect the oil removal effect of the metal foil based on the infrared reflection information.

[0031] The technical solution provided by this application has the following advantages compared with the existing technology:

[0032] Traditional methods indiscriminately apply corona treatment to all locations on the metal foil. However, this application first determines the location of the oil stain by collecting infrared reflection information, and then activates the corresponding corona device only when the oil stain moves to the corona device, achieving precise positioning and targeted treatment of the oil stain. Because the area where the oil stain remains is a small proportion of the total area of ​​the metal foil, this targeted treatment avoids unnecessary treatment of clean areas and greatly reduces energy consumption. Furthermore, by activating the corona device only at the oil stain location, the scope and duration of the corona treatment are reduced, thereby reducing the amount of ozone produced and reducing the potential impact of ozone on worker health. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] Figure 1 A schematic diagram of a process for treating oil stains on the surface of a metal foil provided in an embodiment of the present application;

[0036] Figure 2A schematic structural diagram of a metal foil surface oil treatment device provided in an embodiment of the present application;

[0037] Figure 3 This is a schematic structural diagram of another metal foil surface oil treatment device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present application, not all of the embodiments.

[0040] The present invention provides a method for treating oil stains on the surface of a metal foil. Figure 1 A schematic diagram of a method for treating oil stains on the surface of a metal foil provided in an embodiment of the present application, referring to Figure 1 , the metal foil surface oil treatment methods include S110-S120:

[0041] S110 , obtaining infrared reflection information of the surface of the metal foil, and determining the location of the oil stain on the metal foil based on the infrared reflection information.

[0042] In actual operation, a metal foil is first placed on the production line, moving it at a constant speed. An infrared device is then used to scan the surface of the foil. Because oil stains (such as rolling oil residue) on the foil surface differ from clean metal surfaces in infrared reflection characteristics, the oil stains affect the reflection of infrared light. The reflected infrared signal is collected to generate infrared reflection information. The control system then analyzes and processes this information using a pre-set algorithm to determine the specific location of the oil stain.

[0043] When organic molecules in oil are exposed to infrared radiation, different chemical bonds and molecular groups (such as CH, NH, OH, C=O, C=C, etc.) selectively absorb specific wavelengths of infrared radiation based on the principles of molecular vibrational spectroscopy. The underlying mechanism is a matching relationship between the energy carried by infrared light and the vibrational energy levels of chemical bonds within the molecule. Each chemical bond has a unique natural vibrational frequency, and when the infrared light frequency matches this, resonant absorption occurs.

[0044] Aluminum foil exhibits excellent optical properties within the infrared wavelength range, with a reflectivity of 95% or higher. This property makes it widely used in thermal insulation applications, effectively suppressing heat transfer by efficiently reflecting heat energy. Based on this characteristic, when areas of residual rolling oil are present on the surface of the aluminum foil, the organic molecules in the rolling oil absorb infrared light, significantly reducing the intensity of infrared light reflected from these areas compared to clean areas of the foil. By using an infrared camera to capture reflected infrared light from the aluminum foil surface and utilizing a control system to precisely calculate and analyze the differences in infrared light intensity at specific wavelengths, an image can be generated that reflects the distribution of residual rolling oil.

[0045] S120 , moving the oil stain position of the metal foil to the corona device, and controlling the corona device corresponding to the oil stain position of the metal foil to start.

[0046] During the movement of the metal foil, the location of the oil stain is tracked in real time. When the oil stain is about to reach the treatment area of ​​the corona device as the foil moves, the control system can issue a command to activate the corona device corresponding to the oil stain location based on preset logic and parameters, and carry out targeted corona treatment on the oil stain area.

[0047] Traditional methods indiscriminately apply corona treatment to all locations on the metal foil. However, the present embodiment first determines the location of the oil stain by collecting infrared reflection information, then activates the corresponding corona device only when the oil stain moves to the corona device. This achieves precise positioning and targeted treatment of the oil stain. Because the area where the oil stain remains is a small proportion of the total area of ​​the aluminum foil, this targeted treatment avoids unnecessary treatment of clean areas, significantly reducing energy consumption. Furthermore, by activating the corona device only at the oil stain location, the scope and duration of the corona treatment are reduced, thereby reducing the amount of ozone generated and its potential impact on worker health.

[0048] In some optional embodiments, obtaining infrared reflection information from the surface of the metal foil and determining the location of the oil stain on the metal foil based on the infrared reflection information may include:

[0049] The infrared light source is controlled to irradiate the surface of the metal foil, and the infrared reflection information is obtained through the infrared collection device. The position where the reflection intensity in the infrared reflection information meets the preset conditions is determined as the oil stain position of the metal foil.

[0050] An infrared light source and infrared collection device are installed at appropriate locations on the metal foil production line. The infrared light source emits infrared light of a specific wavelength, evenly irradiating the surface of the metal foil. Different areas of the metal foil surface reflect infrared light at varying intensities. Clean metal surfaces reflect more intensely, while areas with oil stains have lower reflection intensities than clean areas due to the absorption and scattering of the oil. The infrared collection device receives infrared light reflected from the metal foil surface in real time and converts it into an electrical signal, forming infrared reflection information. A reflection intensity threshold is set as a pre-set condition based on experimental and production experience. When the reflection intensity at a location in the infrared reflection information falls below this threshold, that location is identified as an oil stain.

[0051] The embodiments of the present application actively control an infrared light source to illuminate the surface of the metal foil, utilize an infrared acquisition device to obtain reflection information, and determine the location of the oil stain in combination with preset reflection intensity conditions, making oil stain detection more accurate and reliable. The use of an infrared light source enhances the controllability and stability of detection, enabling a clear distinction between oil-stained areas and clean areas. Determining the location of the oil stain using reflection intensity as a quantitative indicator avoids the subjectivity and uncertainty of manual detection, provides precise location information for subsequent targeted corona treatment, further improves treatment efficiency and accuracy, and reduces energy waste and ozone emissions.

[0052] In some optional embodiments, the infrared light source can be selected from the mid-infrared band (2.5-25 μm), with the 3.4-3.5 μm wavelength range being the preferred target detection band. This band corresponds to the characteristic absorption peak of C-H bonds in organic compounds, significantly improving the detection sensitivity of rolling oil residue. To accurately select the target wavelength, a narrowband filter can be placed at the light source output end, for example, to limit the wavelength range of the incident light and effectively eliminate interference from light in non-target bands.

[0053] In terms of optical path layout, for example, an infrared light source can be used to illuminate the surface of the metal foil at an incident angle of 45°±10°. This angle setting causes the incident light to form a reflection characteristic mainly composed of diffuse reflection on the metal surface; an infrared collection device (such as an infrared camera) receives the infrared light reflected by the surface of the metal foil.

[0054] In some optional embodiments, a benchmark calibration may be performed first: a metal foil area with no rolling oil residue is selected, an infrared light source is controlled to illuminate the area, infrared reflection information of the area is collected by an infrared acquisition device, and the reflection intensity is extracted and recorded as a benchmark value (I0).

[0055] As the metal foil continues to move on the production line, the infrared acquisition device scans the surface of the aluminum foil line by line, obtains the infrared reflection information of each point in real time, and extracts the corresponding reflection intensity value (I x ).

[0056] Calculate the difference between the reflection intensity and the reference value for each point ΔI=I0-I x , compare the calculated difference ΔI with the preset threshold (the empirical value is the intensity difference corresponding to a 5% decrease in reflectivity). If ΔI ≥ the preset threshold, it is determined that the reflection intensity in the infrared reflection information at the location of the point meets the preset conditions, and it is determined to be the oil stain location of the metal foil.

[0057] In some optional embodiments, the ΔI data can also be converted into a visual rolling oil residue map through image processing algorithms (such as grayscale mapping or binarization processing). The coordinates and area ratio of the residual area are highlighted in the map and sent to the terminal device for display, providing the user with a visual display of the oil pollution location.

[0058] In some optional embodiments, when the oil stain position of the metal foil moves to the corona device, controlling the corona device corresponding to the oil stain position of the metal foil to start includes:

[0059] When the oil stain position of the metal foil moves to the first corona device, the first corona device is controlled to start;

[0060] The corona range of the first corona device covers the width of the metal foil.

[0061] The first corona device is positioned at a specific location within the metal foil production line, with its corona discharge covering the entire width of the foil. When the oil stain, identified through infrared detection, is about to enter the first corona device's treatment area as the foil moves, the control system detects its arrival and immediately issues a start command, activating the first corona device. Upon activation, the first corona device generates a corona discharge within its corona discharge area, which covers the entire width of the foil. This discharge treats the surface of the metal foil passing through this area, effectively removing oil from the oil stain.

[0062] In this embodiment, the corona range of the first corona device covers the width of the foil. When the oil stain position moves to the device, the entire device is activated to treat the area. This method is suitable for situations where the oil stain position has a certain range in the width direction of the foil, or a certain area in the entire width direction needs to be treated as a whole. Compared with the traditional method of indiscriminately treating the entire foil, although the first corona device has a treatment range of the entire width, it is only activated when the oil stain position is detected, avoiding the energy waste of continuously treating the entire foil in the traditional method. At the same time, it reduces the working time of the corona device, thereby reducing the production of ozone, protecting the health of the staff to a certain extent, and can effectively treat the oil stain position, ensuring the treatment effect.

[0063] In some optional embodiments, when the oil stain position of the metal foil moves to the corona device, controlling the corona device corresponding to the oil stain position of the metal foil to start includes:

[0064] When the oil stain position of the metal foil moves to the second corona device, the corona electrode corresponding to the oil stain position in the second corona device is controlled to start;

[0065] The second corona device includes a plurality of corona electrodes, which are sequentially arranged along the width direction of the metal foil.

[0066] A second corona device is installed in the corona treatment area of ​​the metal foil production line. This device consists of multiple corona electrodes arranged in sequence across the width of the foil, each responsible for a specific area along the foil's width. After the infrared device determines the specific location of the oil stain across the foil's width, as the metal foil moves, when the oil stain reaches the treatment area of ​​the second corona device, the corresponding corona electrode is determined based on the coordinates of the oil stain across the foil's width, and a start signal is sent to that corona electrode. Only the corona electrode corresponding to the oil stain is activated, generating a corona discharge to treat the localized area where the oil stain is located, while the other corona electrodes not corresponding to the oil stain remain inactive.

[0067] The second corona device utilizes multiple corona electrodes positioned along the width of the metal foil, enabling precise control of different locations across the foil. When the oil stain reaches the device, only the corresponding corona electrode is activated to treat the localized area of ​​the oil stain. This approach further enhances the targeted treatment, limiting corona treatment to the tiny area containing the oil stain. This minimizes the operating range and duration of the corona device and significantly reduces energy consumption. Furthermore, since only the corresponding corona electrodes are active, the amount of ozone generated is significantly reduced, better protecting the health of workers. It also precisely removes oil stains without affecting other clean areas of the foil, improving the quality and efficiency of the treatment.

[0068] It should be noted that the embodiment of the present application does not limit the number of corona electrodes in the second corona device. In actual applications, the number can be selected according to actual conditions. For example, the width of the metal foil is divided into N independent control areas (N ≥ 20, single area width ≤ 50 mm), each area corresponds to a corona electrode, and each corona electrode is equipped with an independent high-voltage power supply and switch module.

[0069] In some optional embodiments, when the oil stain position of the metal foil moves to the corona device, controlling the corona device corresponding to the oil stain position of the metal foil to start includes:

[0070] The time it takes for the oil stain position of the metal foil to move to the corona device is determined based on the distance between the infrared reflection information collection position and the corona device, as well as the movement speed of the metal foil. When the oil stain position of the metal foil moves to the corona device, the corona device corresponding to the oil stain position of the metal foil is controlled to start.

[0071] On a metal foil production line, the distance between the infrared device collecting infrared reflection information and the corona device is determined, for example, denoted as L. Simultaneously, the metal foil's velocity, denoted as v, is monitored in real time. According to the kinematic formula, the time required for the oil stain to move from the infrared reflection information collection point to the corona device is t = L / v. Once the infrared device locates the oil stain, after time t has elapsed, indicating that the stain has reached the corona device, a start command is issued, initiating the corresponding corona device to initiate corona treatment.

[0072] The embodiment of the present application accurately calculates the time it takes for the oil stain position to move from the collection position to the corona device, and can accurately start the corresponding corona device when the oil stain position reaches the corona device, avoiding inaccurate treatment or energy waste caused by early or delayed start. In traditional methods, since the movement time of the oil stain position is not accurately calculated, the corona device may be started at an inappropriate time, either starting early to treat the non-oil stain area, or starting late and causing the oil stain to not be treated. However, this embodiment ensures that the corona device is started at the most appropriate time through accurate calculation of distance and speed, realizes precise docking treatment of the oil stain position, improves the accuracy and effectiveness of the treatment, and also ensures that the corona device only works when necessary, further saving energy and reducing the production of ozone.

[0073] In some optional embodiments, the method further includes controlling the corona time of a corona device corresponding to the oil stain position on the metal foil according to the length of the oil stain position along the moving direction of the metal foil and the moving speed of the metal foil.

[0074] The infrared device not only determines the coordinates of the oil stain position on the surface of the metal foil, but also measures the length of the oil stain position along the direction of movement of the metal foil, which is recorded as S. At the same time, the movement speed v of the metal foil is obtained in real time. Since corona treatment requires a certain amount of time to effectively remove oil stains, in order to ensure that the oil stain area can be fully treated, the corona time t' should be at least equal to the time required for the oil stain position to pass through the treatment area of ​​the corona device along the direction of movement, that is, t'=S / v. Based on the calculated corona time t', the control system controls the device to continue working for t' time when starting the corresponding corona device, ensuring that the oil stain area completely passes through the treatment area of ​​the corona device, thereby obtaining sufficient corona treatment.

[0075] Different oil stain locations may have different lengths along the direction of motion. If the corona time is too short, the oil may not be completely removed; if the corona time is too long, it will waste energy and produce more ozone. This embodiment precisely controls the corona time based on the length of the oil stain location and the movement speed of the metal foil, ensuring that the corona device's operating time just meets the requirements for treating the oil stain area. This ensures that the oil stain is completely removed while avoiding unnecessary long operating times. This precise time control further improves the efficiency and effectiveness of the treatment, saving energy while reducing ozone emissions, protecting the health of workers, and optimizing and intelligentizing the treatment process.

[0076] In some optional embodiments, after the corona device corresponding to the oil stain position on the metal foil is activated and the oil stain on the metal foil is corona treated, the method further includes:

[0077] The infrared reflection information of the metal foil surface after corona treatment is collected, and the oil removal effect of the metal foil is detected based on the infrared reflection information.

[0078] After the corona device has treated the oil stain, the metal foil continues to move. The infrared device is then used to scan the treated foil surface again, collecting infrared reflection data. This newly collected infrared reflection data is then compared with the pre-treatment data or with a preset infrared reflection standard for a clean metal surface. The effectiveness of oil removal is determined by analyzing changes in reflection intensity. If the reflection intensity after treatment approaches or reaches the standard for a clean area, the oil removal effect is satisfactory. If the reflection intensity remains below the standard, residual oil may be present.

[0079] This embodiment adds a step to detect the effectiveness of oil removal after corona treatment. By recollecting and analyzing infrared reflection information, the effectiveness of the corona treatment can be monitored in real time. Traditional methods lack effective post-treatment detection methods, making it impossible to promptly determine whether the oil has been completely removed. This can lead to problems such as incomplete coating during subsequent coating processes. However, this embodiment uses detection to promptly detect incomplete treatment, providing a basis for subsequent adjustments and treatments, ensuring that oil stains on the metal foil surface are effectively removed, improving product quality, avoiding subsequent production problems caused by incomplete treatment, and ensuring the stability and reliability of the production process.

[0080] In some optional embodiments, the method further includes dynamically adjusting the corona power of the corona device based on the oil pollution removal effect.

[0081] In some embodiments, when the oil stain removal effect is good, that is, the oil stain is effectively removed or less remains, the corona power of the corona device can be reduced.

[0082] In some embodiments, based on the oil removal effect being residual oil, the corona power of the corona device is increased.

[0083] If the infrared device detects residual oil removal, the current corona discharge power is insufficient to completely remove the oil. The control system automatically increases the corona discharge power according to a pre-set adjustment strategy. This increased corona discharge power strengthens the intensity of the corona discharge, effectively breaking down and removing the residual oil. This increased power ensures that the oil treatment effect is maintained on subsequent metal foils.

[0084] This application also provides a metal foil surface oil treatment device, Figure 2 This is a structural schematic diagram of a metal foil surface oil treatment device provided in an embodiment of the present application, which includes a metal foil conveying device 10, a first infrared device 20, a corona device 30 and a control system 40.

[0085] The metal foil conveying device 10 is used to convey the metal foil 50. The metal foil conveying device 10 may include, for example, at least one roller 11 installed on a coating production line and used to convey the metal foil 50.

[0086] The first infrared device 20 is positioned on the first and / or second side of the metal foil 50 to collect infrared reflection information from the metal foil surface and determine the location of any oil contamination on the metal foil based on the infrared reflection information. The infrared device can be positioned on one or both sides of the metal foil 50 to detect residual oil contamination on one or both sides. Figure 2 In the example, the first infrared device 20 is disposed on both the first side and the second side of the metal foil 50 .

[0087] The first infrared device, for example, primarily consists of an infrared light source and an infrared collection device. The infrared light source utilizes a mid-infrared light-emitting device capable of emitting infrared light within a specific wavelength range toward the surface of the metal foil. The infrared collection device utilizes a highly sensitive infrared sensor array to capture infrared light reflected from the metal foil surface, converting the optical signal into an electrical signal for further processing into infrared reflection information.

[0088] The control system 40 is electrically connected to the first infrared device 20 and the corona device 30 respectively. The control system 40 can analyze and process the collected infrared reflection information based on a preset algorithm, and determine the specific location of the oil stain on the surface of the metal foil by comparing the difference in reflection intensity at different positions.

[0089] The corona device 30 is disposed on the first side and / or the second side of the metal foil 50 and is located along the moving direction of the metal foil (eg Figure 2Downstream of the first infrared device (in the horizontal right direction), the control system 40 moves to the corona device 30 at the oil stain position of the metal foil, and controls the corona device 30 corresponding to the oil stain position of the metal foil to start.

[0090] The corona device 30 is arranged downstream of the first infrared device in the direction of movement of the metal foil, and is located on the same side of the metal foil as the first infrared device. The corona device is composed of, for example, a corona electrode, a high-voltage power supply, and a switch module. The corona electrode adopts a specially designed metal structure, and under the action of the high-voltage power supply, it can generate a corona discharge phenomenon near the electrode. The switch module is connected to the control system 40. The control system 40 accurately calculates the time it takes for the oil stain position to move to the corona device based on the oil stain position information determined by the first infrared device and in combination with parameters such as the movement speed of the metal foil. When the oil stain position reaches the predetermined position, a command is issued to start the corona electrode at the corresponding position, and the oil stain area on the metal foil is subjected to targeted corona treatment to decompose the oil stain to meet subsequent production needs.

[0091] Driven by a conveyor, the metal foil moves forward at a steady speed. As the foil passes beneath the first infrared device, an infrared light source illuminates the foil surface. Due to the absorption properties of infrared light, the intensity of the reflected infrared light is reduced in oily areas compared to clean areas. An infrared acquisition device captures this reflected light and converts it into infrared reflection information. This information is analyzed using a pre-set algorithm. Locations where the reflection intensity falls below a certain threshold are identified as oily areas, and their coordinates are recorded.

[0092] As the metal foil continues to move, the corona device monitors its movement in real time. Based on the oil stain's location information provided by the first infrared device and the foil's speed, it calculates the exact moment the oil stain reaches the corona device. When the oil stain reaches the corona device, the corresponding corona electrodes are quickly activated. A high-voltage power supply powers the electrodes, generating a corona discharge that treats the oil stain, ultimately removing the oil stain from the metal foil.

[0093] The embodiment of the present application uses a first infrared device to emit infrared light of a specific wavelength, accurately capturing the effect of oil stains on the surface of the metal foil on the reflection intensity of the infrared light, thereby achieving precise positioning of the oil stain position. Compared with traditional manual detection or simple optical detection methods, the accuracy and efficiency of detection are greatly improved, providing a reliable basis for subsequent oil stain treatment. According to the oil stain position determined by the first infrared device, the corona device accurately activates the corona electrode at the corresponding position when the oil stain arrives, thereby achieving targeted treatment of the oil stain area. Compared with the traditional method of indiscriminate corona treatment of the entire metal foil surface, this targeted treatment method can significantly reduce the scope and time of corona treatment, avoid ineffective treatment of clean areas, thereby effectively reducing energy consumption, while reducing the production of harmful gases such as ozone, and protecting the working environment and the health of operators.

[0094] In some optional embodiments, a second infrared device may also be included. Figure 3 This is a schematic diagram of the structure of another metal foil surface oil treatment device provided in the embodiment of the present application. Figure 3 As shown, the second infrared device 60 is located downstream of the corona device 30 along the moving direction of the metal foil, and is used to collect infrared reflection information of the surface of the metal foil after corona treatment, and detect the oil removal effect of the metal foil based on the infrared reflection information.

[0095] After the foil has been treated by the corona device, it moves to the detection area of ​​the second infrared device. The second infrared device's light source illuminates the treated surface, and its camera captures the reflected signal. This newly captured infrared reflection information is then compared with the pre-treatment information or with a preset infrared reflection standard for a clean metal surface. The effectiveness of oil removal is determined by analyzing changes in reflection intensity. If the post-treatment reflection intensity approaches or reaches the standard for a clean area, the oil removal has been successful. If the reflection intensity remains below the standard, residual oil may be present.

[0096] In some optional embodiments, the first infrared device and / or the second infrared device may include an infrared light source and an infrared collection device. The infrared light source emits infrared light of a specific wavelength, uniformly irradiating the surface of the metal foil. Different areas of the metal foil surface reflect different intensities of infrared light. Clean metal surfaces reflect higher intensities, while areas with oil stains reflect less strongly than clean areas due to absorption and scattering by the oil. The infrared collection device receives the infrared light reflected from the metal foil surface in real time and converts it into an electrical signal, forming infrared reflection information.

[0097] In some optional embodiments, the infrared light source can use the mid-infrared band (2.5-25 μm), among which the wavelength range of 3.4-3.5 μm is preferred as the target detection band. This band corresponds to the characteristic absorption peak of the CH bond in organic matter, which can significantly improve the detection sensitivity of rolling oil residue. In order to achieve accurate screening of the target wavelength, a narrow-band filter can be configured at the output end of the light source, for example, to effectively eliminate the interference of non-target band light by limiting the wavelength range of the incident light. In terms of optical path layout, for example, an infrared light source can be used to illuminate the surface of the metal foil at an incident angle of 45°±10°. This angle setting causes the incident light to form a reflection characteristic mainly of diffuse reflection on the metal surface; an infrared acquisition device (such as an infrared camera) receives the infrared light reflected by the surface of the metal foil.

[0098] In some optional embodiments, the corona device includes, for example, a first corona device, the corona range of which covers the width of the metal foil. Accordingly, when the oil stain on the metal foil moves to the first corona device, the first corona device is controlled to start.

[0099] The first corona device is positioned at a specific location within the metal foil production line, with its corona discharge covering the entire width of the foil. When the oil stain, identified through infrared detection, is about to enter the first corona device's treatment area as the foil moves, the control system detects its arrival and immediately issues a start command, activating the first corona device. Upon activation, the first corona device generates a corona discharge within its corona discharge area, which covers the entire width of the foil. This discharge treats the surface of the metal foil passing through this area, effectively removing oil from the oil stain.

[0100] In some optional embodiments, the corona device, for example, includes a second corona device, which includes a plurality of corona electrodes and is sequentially arranged along the width direction of the metal foil. Accordingly, when the oil stain position of the metal foil moves to the second corona device, the corona electrode corresponding to the oil stain position in the second corona device is controlled to start. The second corona device is installed in the corona treatment area of ​​the metal foil production line. The device is composed of a plurality of corona electrodes, which are arranged sequentially along the width direction of the foil, and each corona electrode is responsible for a specific area in the width direction of the foil. After the specific position of the oil stain position in the width direction of the foil is determined by an infrared device, as the metal foil moves, when the oil stain position reaches the treatment area of ​​the second corona device, the corresponding corona electrode is determined according to the coordinates of the oil stain position in the width direction of the foil, and a start signal is sent to the corona electrode. Only the corona electrode corresponding to the oil stain position is activated, generating a corona discharge, and treating the local area where the oil stain is located, while the other corona electrodes that do not correspond to the oil stain position remain closed.

[0101] The present application also provides a metal foil surface oil treatment device, comprising:

[0102] An oil stain location determination module is used to obtain infrared reflection information from the surface of the metal foil and determine the oil stain location on the metal foil based on the infrared reflection information;

[0103] The corona device control module is used to move to the corona device at the oil stain position of the metal foil and control the corona device corresponding to the oil stain position of the metal foil to start.

[0104] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for treating oil stains on the surface of a metal foil as described in any one of the above method embodiments are implemented.

[0105] The computer-readable storage medium provided in the embodiments of the present disclosure can execute the steps of any one of the methods in the above-mentioned embodiments of the method for treating oil stains on the surface of metal foil, and thus can also achieve the same technical effects as the above-mentioned method for treating oil stains on the surface of metal foil.

[0106] In addition to the above-mentioned method and metal foil surface oil treatment equipment, the embodiments of the present disclosure may also be a computer program product, which includes computer program instructions. When the computer program instructions are executed by a processor, the processor executes the method steps of various embodiments of the present disclosure.

[0107] The computer program product may be written in any combination of one or more programming languages ​​to implement the operations of embodiments of the present invention, including object-oriented programming languages ​​such as Java, C++, and conventional procedural programming languages ​​such as C or similar programming languages. The program code may be executed entirely on the user's computing device, partially on the user's computing device, as a stand-alone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0108] Computer readable storage media can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can, for example, include but is not limited to a system, device or component of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0109] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0110] The above are merely specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to these embodiments herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A method for treating oil stains on the surface of a metal foil, characterized in that: include: Acquiring infrared reflection information from the surface of the metal foil, and determining the location of the oil stain on the metal foil based on the infrared reflection information; When the oil stain position of the metal foil moves to the corona device, the corona device corresponding to the oil stain position of the metal foil is controlled to start.

2. The method for treating oil stains on the surface of metal foil according to claim 1, characterized in that: The step of obtaining infrared reflection information from the surface of the metal foil and determining the oil stain position of the metal foil based on the infrared reflection information includes: An infrared light source is controlled to illuminate the surface of the metal foil, infrared reflection information is obtained through an infrared acquisition device, and a position in the infrared reflection information where the reflection intensity meets a preset condition is determined as the oil stain position of the metal foil.

3. The method for treating oil stains on the surface of metal foil according to claim 1, characterized in that: The step of moving the oil stain position of the metal foil to the corona device and controlling the corona device corresponding to the oil stain position of the metal foil to start includes: When the oil stain position of the metal foil moves to the first corona device, the first corona device is controlled to start; Wherein, the corona range of the first corona device covers the foil width of the metal foil.

4. The method for treating oil stains on the surface of metal foil according to claim 1, characterized in that: The step of moving the oil stain position of the metal foil to the corona device and controlling the corona device corresponding to the oil stain position of the metal foil to start includes: When the oil stain position of the metal foil moves to the second corona device, the corona electrode corresponding to the oil stain position in the second corona device is controlled to start; Wherein, the second corona device includes a plurality of corona electrodes, which are sequentially arranged along the width direction of the metal foil.

5. The method for treating oil stains on the surface of metal foil according to claim 1, characterized in that: The step of moving the oil stain position of the metal foil to the corona device and controlling the corona device corresponding to the oil stain position of the metal foil to start includes: The time it takes for the oil stain position of the metal foil to move to the corona device is determined based on the distance between the infrared reflection information collection position and the corona device, as well as the movement speed of the metal foil. When the oil stain position of the metal foil moves to the corona device, the corona device corresponding to the oil stain position of the metal foil is controlled to start.

6. The method for treating oil stains on the surface of metal foil according to claim 1, characterized in that: Also includes: The corona time of the corona device corresponding to the oil stain position of the metal foil is controlled according to the length of the oil stain position along the moving direction of the metal foil and the moving speed of the metal foil.

7. The method for treating oil stains on the surface of metal foil according to claim 1, characterized in that: After controlling the corona device corresponding to the oil stain position of the metal foil to start and corona treating the oil stain of the metal foil, the method further includes: Infrared reflection information of the surface of the metal foil after the corona treatment is collected, and the oil stain removal effect of the metal foil is detected based on the infrared reflection information.

8. The method for treating oil stains on the surface of metal foil according to claim 7, characterized in that: Also includes: Based on the oil pollution removal effect, the corona power of the corona device is dynamically adjusted.

9. A metal foil surface oil treatment device, characterized in that: include: Metal foil conveying device, first infrared device, corona device and control system; The metal foil conveying device is used to convey metal foil; The first infrared device is arranged on the first side and / or the second side of the metal foil, and is used to collect infrared reflection information from the surface of the metal foil; The corona device is arranged on the first side and / or the second side of the metal foil and is located downstream of the first infrared device along the moving direction of the metal foil; The control system is electrically connected to the first infrared device and the corona device, respectively, and is used to determine the oil stain position of the metal foil based on the infrared reflection information, and move from the oil stain position of the metal foil to the corona device to control the corona device corresponding to the oil stain position of the metal foil to start.

10. The metal foil surface oil treatment equipment according to claim 9, characterized in that: It also includes a second infrared device; the second infrared device is located downstream of the corona device along the movement direction of the metal foil, and is used to collect infrared reflection information of the surface of the metal foil after corona treatment, and is electrically connected to the control system; the control system is used to detect the oil removal effect of the metal foil based on the infrared reflection information.

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