Foil rolling oil removal equipment

Abstract

This foil material rolling oil removal apparatus includes a foil rolling mill (100), an extraction tank (200), and a dryer (300) arranged sequentially along the foil material movement direction. The extraction tank is used to inject an extractant and has a liquid sealing structure at its opening. The foil rolling mill is used to roll the foil material, and the dryer is used to dry the foil material. The foil material rolling oil removal apparatus further includes a foil material conveyor used to convey the foil material from the foil rolling mill and the extraction tank to the dryer. This also includes a rolling oil removal method using this foil material rolling oil removal apparatus. The apparatus removes oil from the foil material by extraction, and the extraction tank is sealed with a liquid sealing structure, thereby reducing the volatilization of the extractant and reducing the impact of condensed water coagulation on the surface performance of the foil material.

Description

[Technical Field]

[0001] The present application relates to the technical field of foil material preparation, in particular to a foil material rolling oil removal device. Place Regarding. [Background technology]

[0002] The conventional manufacturing process for aluminum foil involves multiple rolling and thinning processes. The addition of rolling oil during the rolling process is essential, primarily for lubrication, cooling, cleaning, and oxidation prevention. However, the use of rolling oil can result in the following problems with the foil: 1. Residual rolling oil on the surface of the produced foil reduces surface polarity and causes uneven dyne values. 2. The application of foil can result in incomplete coating, leading to poor peelability. Currently, active materials and other conductive materials are primarily applied to battery foil using coating techniques, but residual rolling oil on the surface can lead to incomplete coating and weakened peel strength. 3. The surface wetting tension of foil material is directly related to the amount of oil attached to the surface of the foil material. The surface tension of aluminum foil that has been completely degreased is 72 dynes or more, the surface tension of aluminum foil after rough rolling is around 31 dynes, and the surface tension of aluminum foil after finish rolling is around 32 dynes. If the oil is not completely removed, the foil product may suffer from defects such as oil stains, bubbling, streaks, and uneven oil. These problems will have a serious impact on the subsequent application and use of the foil material. Summary of the Invention

[0003] According to some embodiments of the present application, a foil rolling machine used to roll the foil material; an extraction tank into which an extractant is poured, which has an opening provided with a liquid seal structure, and which performs oil removal by extraction on the foil material delivered from the foil rolling mill; a dryer used to dry the foil material discharged from the extraction tank; The foil rolling machine and a foil material conveyor used to convey the foil material from the extraction tank to the dryer. We provide a foil rolling oil removal device.

[0004] In some embodiments, the extraction tank is provided with a plurality of overflow plates whose heights increase sequentially along the direction of movement of the foil material, dividing the extraction tank to form a plurality of extraction chambers.

[0005] In some embodiments, the extraction tank is provided with an extractant outlet at the foil inlet side of the extraction tank and an extractant inlet at the foil outlet side of the extraction tank, and the extractant enters through the extractant inlet, flows sequentially through each of the extraction chambers, and is discharged through the extractant outlet.

[0006] In some embodiments, at least one circulating cooler is provided within the extraction tank.

[0007] In some embodiments, the circulating cooler is provided in each of the extraction chambers, and the circulating cooler is used to adjust the temperature of the extractant in the extraction chamber.

[0008] In some embodiments, the liquid seal structure includes a sealing plate that covers the opening of the extraction tank, the sealing plate having at least one exhaust port, and a liquid storage tank that is arranged around each of the exhaust ports at each location on the sealing plate, and a sealing cap that covers the exhaust port and has an edge that is immersed below the liquid level in the liquid storage tank.

[0009] In some embodiments, the extraction tank is externally connected to a positive pressure air source that connects to the space above the liquid level in the extraction tank and is used to maintain a gas pressure within the extraction tank greater than the ambient gas pressure.

[0010] In some embodiments, the foil material conveyor comprises an unwinding mechanism, a winding mechanism, a tensioning mechanism, and a plurality of conveying rolls.

[0011] The unwinding mechanism is provided on the inlet side of the foil rolling mill, and the winding mechanism is provided on the outlet side of the dryer.

[0012] In some embodiments, the tensioning mechanism comprises at least one tensioning roll used to apply tension to the foil material.

[0013] In some embodiments, the tensioning mechanism includes a first tensioning roll disposed between the unwinding mechanism and the foil rolling mill, a second tensioning roll disposed between the foil rolling mill and the extraction tank, and a third tensioning roll disposed between the extraction tank and the dryer.

[0014] In some embodiments, each of the extraction chambers is provided with an independent drain outlet, and each of the drain outlets is provided at the bottom of the extraction tank.

[0015] In some embodiments, the dryer includes a housing having a plurality of nozzles disposed therein, the nozzles being arranged sequentially along the direction of movement of the foil material and blowing air toward the foil material.

[0016] The present application has the following beneficial effects:

[0017] In the present invention, by subjecting the rolled foil to extraction and drying treatments, rolling oil on the surface of the foil can be continuously and efficiently removed. Furthermore, as the temperature of the foil increases after rolling, the rolling oil on the surface is effectively removed during contact with the extractant. Furthermore, by adopting a liquid seal structure, the evaporation of the extractant is reduced, reducing the generation of condensed water, preventing the condensed water from dripping onto the foil surface and affecting the surface performance of the foil. The oil content can be reduced to 0.1% or less.

[0018] In order to more clearly explain the technical aspects of the embodiments of the present application, the following briefly introduces the drawings that need to be used in the description of the embodiments. The drawings in the following description are only embodiments of the present application, and it is obvious to those skilled in the art that they can obtain other drawings based on the disclosed drawings without paying creative labor. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a structural schematic diagram of a foil rolling oil removal device according to some embodiments of the present application. [Figure 2] FIG. 1 is an internal structural view of an extraction tank according to one embodiment of the present application. [Figure 3] 1 is a cross-sectional view of a liquid seal structure according to an embodiment of the present application positioned at an exhaust port. [Explanation of symbols]

[0020] 100 Foil rolling machine 200 Extraction Tank 201 Overflow plate 202 Circulating cooler 203 Extractant inlet 204 Extractant outlet 205 Positive pressure air source 300 Dryer 301 Nozzle 400 Liquid seal structure 401 Exhaust port 402 Storage Tank 403 Seal Cap 500 Unwinding mechanism 600 Winding mechanism 700 transport roll 800 tension mechanism 801 First tension roll 802 No. 2 tension roll 803 3rd tension roll DETAILED DESCRIPTION OF THE INVENTION

[0021] The technical aspects of the embodiments of the present application will be described below in detail and completely in conjunction with the drawings in the embodiments of the present application, but it is clear that the described embodiments are only a part of the embodiments of the present application and do not include all of the embodiments. Based on the embodiments of the present application, all other embodiments that a person skilled in the art can obtain without performing any creative work are within the scope of protection of the present application.

[0022] Additionally, the terms "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Accordingly, a feature qualified with "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of this application, "plurality" means at least two, e.g., two, three, etc., unless expressly and specifically limited otherwise.

[0023] It should be noted that when an element is said to be "fixed to" or "mounted on" another element, it may be directly on the other element, or intermediate elements may be present. When an element is said to be "connected to" another element, it may be directly connected to the other element, or intermediate elements may also be present. Terms such as "vertical," "horizontal," "top," "bottom," "left," "right," and similar terms used herein are for illustrative purposes only and do not represent the only embodiment.

[0024] In a first aspect, an embodiment of the present application provides a foil rolling oil removal device, as shown in FIG. 1 , A foil rolling machine 100 used to roll foil material; an extraction tank (200) into which an extractant is injected, a liquid seal structure (400) is provided at an opening, and oil is removed by extraction from the foil material delivered from the foil rolling mill (100); a dryer 300 used to dry the foil material discharged from the extraction tank 200; The foil rolling machine 100 includes a foil material conveyor used to convey the foil material from the extraction tank 200 to the dryer 300.

[0025] In this application, the extraction tank 200 and dryer 300 are used to carry out the extraction and drying processes on the rolled foil, respectively. During the extraction process, the foil is immersed in the extractant, and the rolling oil on the surface is extracted and removed. After extraction, the foil enters the dryer 300, where the extractant remaining on the surface is evaporated and removed, thereby effectively ensuring the cleanliness of the foil surface, reducing the residual oil rate on the foil surface to 0.1% or less, and achieving continuous and efficient removal of the rolling oil on the foil surface.

[0026] In some embodiments, the foil rolling mill 100 includes a work roll, a support roll, and a plurality of oil injection nozzles, where the support roll is fixed and the work roll is movable, and the thickness of the foil after rolling is controlled by the pitch between the support roll and the work roll. The oil injection nozzles are used to inject rolling oil onto the foil that has entered between the work roll and the support roll, and the foil that has been injected with the rolling oil enters the rolling region between the work roll and the support roll to roll the foil. In some embodiments, the rolling oil is used to lubricate and cool the foil, and the thickness of the foil after rolling is approximately 13 to 15 μm, such as 13.0 μm, 13.2 μm, 13.4 μm, 13.6 μm, 13.8 μm, 14.0 μm, 14.2 μm, 14.4 μm, 14.6 μm, 14.8 μm, or 15.0 μm.

[0027] 2, the extraction tank 200 is provided with a plurality of overflow plates 201, the heights of which increase along the direction of foil movement, and the plurality of overflow plates 201 divide the extraction tank 200 into a plurality of extraction chambers. In the present application, the extraction tank 200 is provided with a plurality of overflow plates 201, and due to the different heights of the overflow plates 201, the overflow direction of the extractant is opposite to the direction of foil movement, thereby realizing multi-stage countercurrent extraction of the foil and improving the contact efficiency between the foil surface and the extractant.

[0028] In some embodiments, the foil is moved back and forth in a serpentine pattern within the extraction tank 200, thereby increasing the contact time between the foil and the extraction agent and effectively removing rolling oil from the surface of the foil.

[0029] In some embodiments, the extraction tank 200 is provided with an extractant outlet 204 at the foil inlet side thereof, and an extractant inlet 203 at the foil outlet side thereof, where the extractant enters through the extractant inlet 203, flows through each extraction chamber in sequence, and is discharged through the extractant outlet 204. In this application, the extractant is added through the extractant inlet 203 to maintain the extractant concentration in each extraction chamber and provide the force for overflow. After extraction, the rolling oil floats on the surface of the extractant liquid, and the liquid layer containing the rolling oil on the surface can be discharged by overflow, thereby effectively ensuring the extraction effect of the extraction tank 200.

[0030] In some embodiments, the present application may further provide a concentration detector (not shown) in the extraction tank 200 to detect the concentration of the rolling oil or the extractant in the extraction tank 200, thereby adjusting and controlling the extractant delivery rate based on the detected concentration in the extraction tank 200, thereby ensuring that the extractant concentration in the extraction tank 200 is stable in real time.

[0031] In some embodiments, the mixture of the rolling oil and the extractant discharged from the extractant outlet 204 is fed into a separation device (not shown), for example, a fractionator, which separates the rolling oil and the extractant by fractional distillation, thereby realizing the recycling of the rolling oil and the extractant.

[0032] In some embodiments, the extraction tank 200 is provided with at least one circulation cooler 202. Preferably, each extraction chamber is provided with a circulation cooler 202, which is used to adjust the temperature of the extractant in the extraction chamber. For example, the circulation cooler 202 has a circulation path connected to the extraction chamber, which is provided with a circulation pump and a cooler, which may be a heat pipe heat exchanger. The circulation pump drives the circulation flow of the extractant in the extraction chamber, thereby realizing the internal circulation flow of the extractant and ensuring uniformity of the extractant in the extraction chamber. Furthermore, the extractant contacts the cooler during circulation, lowering its temperature and thereby reducing the evaporation of the extractant and water vapor, and reducing the condensation of water vapor.

[0033] In some embodiments, the liquid seal structure 400 comprises a sealing plate that is provided to cover the opening of the extraction tank 200, and as shown in Figure 3, at least one exhaust port 401 is provided in the sealing plate, and a liquid storage tank 402 and a seal cap 403 are provided at each position of the sealing plate corresponding to each of the exhaust ports 401, the liquid storage tank 402 is provided around the circumferential direction of the exhaust port 401, and the seal cap 403 is provided to cover the exhaust port 401 and its edge is immersed below the liquid level in the liquid storage tank 402.

[0034] In some embodiments, the sealing cap 403 is fixed to the sealing plate or the wall of the liquid storage tank 402 in the form of a holder. After the sealing cap 403 is inserted into the liquid storage tank 402, a U-shaped tank structure is formed. After liquid is added to the liquid storage tank 402, a liquid sealing layer is formed, thereby achieving a sealing effect, i.e., a seal is formed between the liquid sealing layer and the side wall of the sealing cap 403.

[0035] In some embodiments, a positive pressure air source 205 is externally connected to the extraction tank 200. The positive pressure air source 205 is connected to the space above the liquid level in the extraction tank 200 and is used to maintain the gas pressure in the extraction tank 200 greater than the ambient gas pressure. The positive pressure air source 205 may be a nitrogen gas source. In this application, by flowing gas into the extraction tank 200, a slight positive pressure state is created in the extraction tank 200, which effectively prevents water vapor from the ambient gas from entering the extraction tank 200, reducing the condensation of water vapor and reducing the evaporation of the extractant.

[0036] In some embodiments, the foil conveyor comprises an unwinding mechanism 500, a winding mechanism 600, a tensioning mechanism 800, and a plurality of conveying rolls 700.

[0037] The unwinding mechanism 500 is provided on the inlet side of the foil rolling mill 100, and the winding mechanism 600 is provided on the outlet side of the dryer 300. For example, the unwinding mechanism 500 includes an unwinding roll and an unwinding drive motor, and the unwinding drive motor is used to drive the unwinding roll to rotate and unwind the foil material wound around the unwinding roll, and the unwinding roll may be an air shaft, and the unwinding speed is, for example, about 10 to 150 m / min, and the winding mechanism 600 includes a winding roll and a winding drive motor, and the winding drive motor is used to drive the winding roll to rotate and wind the foil material around the winding roll for collection.

[0038] In some embodiments, the tensioning mechanism 800 comprises at least one tensioning roll, which is used to apply tension to the foil material.

[0039] In some embodiments, the tension mechanism 800 includes a first tension roll 801, a second tension roll 802, and a third tension roll 803, where the first tension roll 801 is disposed between the unwinding mechanism 500 and the foil rolling mill 100, the second tension roll 802 is disposed between the foil rolling mill 100 and the extraction tank 200, and the third tension roll 803 is disposed between the extraction tank 200 and the dryer 300. In the present application, three tension rolls are provided, forming four tension control segments, which can realize precise adjustment control during foil material transport.

[0040] In some embodiments, the foil rolling oil removal device further includes a tension detector (not shown) and a tension regulator (not shown). The tension detector detects the tension of each tension roll, and the tension regulator adjusts the position of the tension roll to increase the tension of the foil and prevent the foil from wrinkling. For example, the tension of the tension roll can be detected by detecting the surface pressure of the tension roll. The tension regulator can be composed of a PLC controller and an actuator. That is, the actuator is connected to the tension roll and is used to move the position of the tension roll. The PLC controller is electrically connected to the actuator and the tension detector independently, so as to automatically adjust the tension of the foil in real time.

[0041] In some embodiments, each of the extraction chambers is provided with an independent drain port, and each of the drain ports is provided at the bottom of the extraction tank 200. For example, each drain port joins a main drain pipe. By providing a drain port in each extraction chamber, the present application can achieve fast drainage during the cleaning process.

[0042] In some embodiments, the dryer 300 comprises a housing, and a plurality of nozzles 301 are provided in the housing, the nozzles 301 are arranged sequentially along the direction of movement of the foil material, and the blowing direction of the nozzles 301 is toward the foil material.

[0043] In a second aspect, an embodiment of the present application provides a method for removing rolling oil from a foil material, the method employing a foil material rolling oil removal device as described in the first aspect, the method comprising: The method includes a step of rolling the foil material, and then sequentially performing extraction with an extractant and drying treatment to remove rolling oil from the surface of the foil material.

[0044] In some embodiments, the extraction process employs countercurrent contact extraction, with the foil moving in the opposite direction to the flow of the extractant. The countercurrent contact between the foil and the extractant improves the contact effect between the foil and the extractant, thereby improving the removal of rolling oil.

[0045] In some embodiments, the extractant comprises methylene chloride. In this application, methylene chloride is used as the extractant because it has high solubility in rolling oil and can remove rolling oil from the surface and voids of the foil material. Methylene chloride has a low boiling point and is easy to dry and remove, so it does not affect the surface performance of the foil material. Furthermore, methylene chloride and rolling oil can be separated by fractional distillation, allowing the rolling oil and methylene chloride to be recycled.

[0046] In some embodiments, the extractant is subjected to a cooling treatment during the extraction process.

[0047] In some embodiments, an inert atmosphere is employed during the extraction process.

[0048] In some embodiments, the pressure of the inert atmosphere is greater than the ambient gas pressure.

[0049] In some embodiments, the inert atmosphere gas comprises nitrogen gas.

[0050] In some embodiments, the temperature of the drying treatment is about 60 to 100°C.

[0051] The present application provides a method for removing rolling oil from the above-mentioned foil material, which comprises the following steps:

[0052] After being rolled, the foil material enters the extraction tank 200 and undergoes multi-stage extraction by passing through multiple extraction chambers in sequence. The flow direction of the extractant is opposite to the direction of the foil material movement, causing the extractant to overflow. After extraction, the foil material enters the dryer 300, where the extractant remaining on the foil material surface is dried and removed, and the mixed liquid flowing out of the extraction tank 200 is recovered.

[0053] In the following examples, the thickness of the foil material after rolling is 13 μm, the rolling oil is CL-1# aluminum foil rolling oil, the length of the foil material immersed in the extractant is 20 m, the type of foil material is aluminum foil, and the unwinding speed is 50 m / min.

[0054] Example 1 This embodiment provides a foil rolling oil removal device that includes a foil rolling mill 100, an extraction tank 200, and a dryer 300, which are arranged sequentially along the foil material movement direction, and a liquid seal structure 400 is installed at the opening of the extraction tank 200. The extraction agent in the extraction tank 200 is methylene chloride, and the drying temperature of the dryer 300 is 80°C.

[0055] The liquid sealing structure 400 includes a sealing plate that covers the opening of the extraction tank 200, and the sealing plate is provided with two exhaust ports 401. Each of the exhaust ports 401 is provided with a liquid storage tank 402 and a sealing cap 403 that surrounds the exhaust port 401, and the edge of the sealing cap 403 is immersed below the liquid level in the liquid storage tank 402.

[0056] The foil rolling oil removal device further comprises a foil conveyor, which is used to convey the foil, and the foil moves back and forth in a serpentine pattern in the extraction tank 200 .

[0057] The foil material conveying machine includes an unwinding mechanism 500, a winding mechanism 600, a tensioning mechanism 800, and a plurality of conveying rolls 700, the unwinding mechanism 500 being provided on the supply side of the foil rolling mill 100, and the winding mechanism 600 being provided on the discharge side of the dryer 300. Furthermore, the tension rolls include a first tension roll 801, a second tension roll 802, and a third tension roll 803, the first tension roll 801 being provided between the unwinding mechanism 500 and the foil rolling mill 100, the second tension roll 802 being provided between the foil rolling mill 100 and the extraction tank 200, and the third tension roll 803 being provided between the extraction tank 200 and the dryer 300.

[0058] Example 2 This embodiment provides a foil rolling oil removal device that is different from Example 1 in the following respects: three overflow plates 201 are installed in the extraction tank 200, and the height of the overflow plates 201 increases sequentially along the direction of foil movement. The overflow plates 201 divide the extraction tank 200 into four extraction chambers.

[0059] An extractant outlet 204 is provided in the extraction tank 200 on the foil material inlet side, and an extractant inlet 203 is provided in the extraction tank 200 on the foil material outlet side. The extractant enters through the extractant inlet 203, flows through each extraction chamber sequentially, and is discharged from the extractant outlet 204.

[0060] Example 3 This embodiment provides a foil rolling oil removal device that is different from Example 2 in the following respects: each of the extraction chambers is provided with a circulation cooler 202, and the circulation cooler 202 has a circulation path that circulates and connects to the extraction chamber, and the circulation path is provided with a circulation pump and a cooler, and the temperature of the cooler is 25°C.

[0061] Example 4 This embodiment provides a foil rolling oil removal device that is different from the first embodiment in the following respects: a positive pressure air source 205 is connected above the liquid surface in the extraction tank 200, and the positive pressure air source 205 is nitrogen gas, and the gas pressure in the extraction tank 200 is greater than the ambient gas pressure of 200 Pa.

[0062] Example 5 This embodiment provides a foil material rolling oil removal device that includes a foil rolling mill 100, an extraction tank 200, and a dryer 300 that are arranged sequentially along the foil material movement direction, and methylene chloride is injected into the extraction tank 200.

[0063] A liquid seal structure 400 is provided at the opening of the extraction tank 200, and the liquid seal structure 400 includes a sealing plate that covers the opening of the extraction tank 200, and two exhaust ports 401 are provided on the sealing plate. Each of the exhaust ports 401 is provided with a liquid storage tank 402 and a sealing cap 403 that surround the exhaust port 401, and the edge of the sealing cap 403 is immersed below the liquid level in the liquid storage tank 402.

[0064] The extraction tank 200 is equipped with three overflow plates 201, the height of which increases in the direction of foil movement. The overflow plates 201 divide the extraction tank 200 into four extraction chambers. An extractant outlet 204 is provided on the foil inlet side of the extraction tank 200, and an extractant inlet 203 is provided on the foil outlet side of the extraction tank 200. The extractant enters through the extractant inlet 203, flows sequentially through each extraction chamber, and is discharged through the extractant outlet 204. Each extraction chamber is equipped with a circulating cooler 202, the temperature of which is 25°C. Each extraction chamber is equipped with an independent drain outlet, each of which is located at the bottom of the extraction tank 200.

[0065] A positive pressure air source 205 is connected above the liquid surface in the extraction tank 200, and is used to maintain the gas pressure in the extraction tank 200 at a level greater than the ambient gas pressure of 200 Pa. The dryer 300 includes a housing and 20 nozzles 301 arranged in the housing, the nozzles 301 being arranged sequentially along the direction of foil movement, and the temperature of the dryer 300 is 80°C.

[0066] The foil material rolling oil removal device further includes a foil material conveyor, the foil material conveyor including an unwinding mechanism 500, a winding mechanism 600, a tensioning mechanism 800, and a plurality of conveying rolls 700, the unwinding mechanism 500 being provided on the supply side of the foil rolling mill 100, and the winding mechanism 600 being provided on the discharge side of the dryer 300. Furthermore, the tension rolls include a first tension roll 801, a second tension roll 802, and a third tension roll 803, the first tension roll 801 being provided between the unwinding mechanism 500 and the foil rolling mill 100, the second tension roll 802 being provided between the foil rolling mill 100 and the extraction tank 200, and the third tension roll 803 being provided between the extraction tank 200 and the dryer 300.

[0067] Comparative Example 1 This comparative example provides a foil rolling oil removal device that is different from Example 1 in the following respects: the extraction tank 200 and the dryer 300 are replaced with a high-temperature steam purging device, the length of the foil to be purged is 1 m, and the temperature of the high-temperature steam is 110°C.

[0068] The surface residual oil rate was detected for the foil materials after oil removal in the above examples and comparative examples. The test results are shown in Table 1. The detection method is as follows: S1, prepare a sample, use a cutting knife to cut the foil material per unit area, and the size of the foil material after cutting is easy to extract, and then weigh it and record the mass as m0; S2, oil removal by washing: The sample cut in S1 is spread and placed in a beaker containing methylene chloride; S3, ultrasonic vibration: The beaker in S2 is placed in an ultrasonic cleaning tank, and the rolling oil is dissolved in methylene chloride using ultrasonic vibration; S4: Take out the sample with tweezers and place it in a beaker containing another fresh methylene chloride, and then subject it to ultrasonic vibration again to more complete removal of the rolling oil. S5, take out the sample and put it in a watch glass, dry it with a constant temperature blower at 60 ° C, the suitable temperature range is 45 ~ 100 ° C; S6, weigh the sample after drying and record it as m1; S7, the oil content calculation formula: (m0-m1) / m0×100%.

[0069] JPEG0003253855000006.jpg71170

[0070] From the above table, the following can be seen:

[0071] (1) Example 2 reveals the following: In this application, multiple spill plates 201 are installed in the extraction tank 200, and due to the different heights of the spill plates 201, the spill direction of the extractant is opposite to the moving direction of the foil material, thereby realizing multi-stage countercurrent extraction of the foil material, improving the contact effect between the foil material surface and the extractant, and after extraction, the rolling oil floats on the surface of the extractant liquid, so that the liquid layer containing the rolling oil on the surface can be discharged by spilling, thereby effectively ensuring the extraction effect of the extraction tank 200.

[0072] (2) Example 3 reveals that the present invention achieves an internal circulation flow of the extractant by cooling the extractant through circulation, ensuring uniformity of the extractant within the extraction chamber, enhancing the turbulent flow of the extractant, and ensuring turbulent contact between the extractant and the foil material, thereby improving the extraction effect. Furthermore, the extractant cools down when it comes into contact with the cooler during circulation, reducing the temperature of the extractant and the evaporation of water vapor, thereby reducing the condensation of water vapor.

[0073] (3) Example 4 reveals the following: In this application, by flowing gas into the extraction tank 200, a slight positive pressure is created inside the extraction tank 200, which effectively prevents water vapor from the ambient gas from entering the extraction tank 200, reduces the condensation of water vapor, and also reduces the volatilization of the extractant due to the slight positive pressure.

[0074] According to the above examples and comparative examples, the present application realizes continuous and efficient removal of rolling oil from the surface of the foil by performing extraction and drying processes on the foil after rolling. The temperature of the foil rises after rolling, and after entering the extraction tank 200, it comes into contact with the extractant, thereby effectively removing the rolling oil from the surface. Furthermore, by adopting the liquid seal structure 400, the evaporation of the extractant is reduced, and the generation of condensed water is reduced, preventing the condensed water from dripping onto the surface of the foil and affecting the surface performance of the foil. The oil content can be reduced to 0.1% or less.

[0075] The technical features of the above-described embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described. However, combinations of these technical features should be considered to be within the scope described in this specification unless there is a contradiction.

[0076] The above-described embodiments only represent some of the embodiments of the present application, and although the description is specific and detailed, they should not be construed as limiting the scope of the utility model claims. It should be noted that those skilled in the art may make some modifications and improvements without departing from the concept of the present application, and all of these fall within the scope of protection of the present application. Therefore, the scope of protection of the utility model of the present application shall be governed by the scope of the attached utility model claims.

Claims

1. a foil rolling machine used to roll the foil material; an extraction tank into which an extractant is poured, which has an opening provided with a liquid seal structure, and which performs oil removal by extraction on the foil material delivered from the foil rolling mill; a dryer used to dry the foil material discharged from the extraction tank; The foil rolling machine and a foil material conveyor used to convey the foil material from the extraction tank to the dryer. Foil rolling oil removal equipment.

2. The extraction tank is provided with a plurality of overflow plates whose heights increase in the direction of movement of the foil material, and which divide the extraction tank to form a plurality of extraction chambers. The foil rolling oil removal device according to claim 1.

3. An extractant outlet is provided in the extraction tank at the foil material inlet side of the extraction tank, and an extractant inlet is provided in the extraction tank at the foil material outlet side of the extraction tank, and the extractant enters through the extractant inlet, flows sequentially through each of the extraction chambers, and is discharged from the extractant outlet. The foil rolling oil removal device according to claim 2.

4. At least one circulation cooler is provided in the extraction tank; The circulating cooler is provided in each of the extraction chambers, and the circulating cooler is used to adjust the temperature of the extractant in the extraction chamber. The foil rolling oil removal device according to claim 3.

5. The liquid seal structure includes a seal plate provided to cover the opening of the extraction tank, the seal plate having at least one exhaust port, and a liquid storage tank provided around each of the exhaust ports in the circumferential direction of the exhaust port, and a seal cap provided to cover the exhaust port and having an edge immersed below the liquid level in the liquid storage tank, at each of the positions of the seal plate corresponding to the exhaust port. The foil material rolling oil removal device according to any one of claims 1 to 4.

6. a positive pressure air source is externally connected to the extraction tank, the positive pressure air source being connected to the space above the liquid level in the extraction tank and used to maintain a gas pressure in the extraction tank greater than the ambient gas pressure; The foil material rolling oil removal device according to any one of claims 1 to 4.

7. the foil material conveying machine includes an unwinding mechanism, a winding mechanism, a tensioning mechanism, and a plurality of conveying rolls; The unwinding mechanism is provided on the inlet side of the foil rolling mill, and the winding mechanism is provided on the outlet side of the dryer. The foil material rolling oil removal device according to any one of claims 1 to 4.

8. The tensioning mechanism includes at least one tensioning roll used to apply tension to the foil material. The foil rolling oil removal device according to claim 7.

9. The tension mechanism includes a first tension roll provided between the unwinding mechanism and the foil rolling mill, a second tension roll provided between the foil rolling mill and the extraction tank, and a third tension roll provided between the extraction tank and the dryer. The foil rolling oil removal device according to claim 8.

10. Each of the extraction chambers is independently provided with a drain port, and each of the drain ports is provided at the bottom of the extraction tank. The foil material rolling oil removal device according to any one of claims 2 to 4.

11. The dryer includes a housing having a plurality of nozzles disposed therein, the nozzles being arranged sequentially along the direction of movement of the foil material and blowing air toward the foil material. The foil material rolling oil removal device according to any one of claims 1 to 4.

12. A rolling oil removal method employing the foil material rolling oil removal device according to any one of claims 1 to 11, The method includes a step of rolling the foil material, and then sequentially performing extraction with an extractant and drying treatment to remove rolling oil from the surface of the foil material. A method for removing rolling oil from foil materials.

13. Countercurrent contact extraction is adopted in the extraction process, and the moving direction of the foil material is opposite to the flow direction of the extractant. The rolling oil removal method according to claim 12.

14. The extractant comprises methylene chloride. The rolling oil removal method according to claim 12.

15. The extractant is subjected to a cooling treatment during the extraction process. The rolling oil removal method according to any one of claims 12 to 14.

16. An inert atmosphere is used during the extraction process, the pressure of the inert atmosphere is greater than the ambient gas pressure, and the gas of the inert atmosphere comprises nitrogen gas; The rolling oil removal method according to any one of claims 12 to 14.

17. The temperature of the drying treatment is about 60 to 100°C. The rolling oil removal method according to any one of claims 12 to 14.

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