PE film chilling roller oil removal device

Abstract

The utility model discloses a PE (Poly Ethylene) membrane chilling roller deoiling device, which relates to the technical field of lithium battery wet diaphragm production, and comprises a chilling roller and a chilling water tank, the chilling water tank is provided with a water tank water inlet and a water tank outlet, the chilling roller is arranged in the chilling water tank, the upper end of the chilling water tank is fixedly provided with a press roller seat plate, and the press roller seat plate is provided with a press roller. Two groups of compression roller cylinders are fixedly mounted on the compression roller seat plate, a second water removal pressure roller is fixedly mounted at the output end of one group of compression roller cylinders, a first water removal pressure roller is fixedly mounted at the output end of the other group of compression roller cylinders, an oil suction air knife is mounted on the compression roller seat plate, and a connecting pipe is connected to the oil suction air knife. According to the film pasting device, the roller surface can be kept stable and clean for a long time, the film pasting effect is guaranteed, the produced film does not have the abnormity of large white spots, and the product quality is kept stable.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery wet process separator production technology, specifically to a PE film quenching roller degreasing device. Background Technology

[0002] The quenching process is a crucial step in the wet-process production of lithium-ion battery separators. In this process, the material extruded from the die is cast onto a quenching roller. The roller rotates, drawing the cast material into a quenching water bath for cooling, forming a stable, thick sheet. This stable sheet then proceeds to the next process. Because the raw materials are PE powder and white oil, the extruded material contains a significant amount of white oil, resulting in a high white oil content on the quenching roller surface and in the water bath. During the rotation of the quenching roller, as the sheet is peeled off, water and oil are carried onto the roller surface. This water and oil must be treated; otherwise, it will affect the adhesion of the cast material. Generally, if there is oil and water on the roller surface, the adhesion will be poor, and air bubbles will form between the cast material and the quenching roller. This will result in uneven thickness of the sheet emerging from the quenching water bath, with areas containing air bubbles being thinner, ultimately affecting separator production.

[0003] Previous methods or other patented methods for degreasing devices using chilled rollers include a chilled roller and a water tank. The chilled roller has a dewatering pressure roller, and the water tank contains inlet and outlet pipes. During the rotation of the chilled roller, the pressure roller is pressed down, scraping off the water and oil. When the chilled roller rotates back to contact the casting film, it adheres to the casting film. Simultaneously, the inlet and outlet pipes in the water tank circulate water. During circulation, the water passes through a stratification tank for further degreasing, and then is further heated by chilled water, thus maintaining a constant water temperature and ensuring continuous and stable operation.

[0004] While the above technical solution can maintain stable system operation, a single pressure roller cannot completely remove water and oil from the surface of the cooling roller during operation. In particular, the oil is not 100% pure because the water tank becomes somewhat contaminated during operation. After being scraped by the pressure roller, a thick layer of oil residue forms behind the pressure roller. When the oil is not completely pure, some of it adheres tightly to the surface of the cooling roller. Thus, even with continuous scraping, a small amount of oil will still adhere to the cooling roller after passing through the pressure roller. This can lead to poor casting adhesion from time to time over a long period of time, thereby affecting product quality. Utility Model Content

[0005] The purpose of this invention is to provide a PE film chiller roller degreasing device to solve the technical problem of incomplete degreasing of the chiller roller surface in the prior art.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A PE film quenching roller degreasing device includes a quenching roller and a quenching water tank. The quenching water tank is provided with a water tank inlet and a water tank outlet. The quenching roller is disposed in the quenching water tank. A pressure roller seat plate is fixedly disposed at the upper end of the quenching water tank. Two sets of pressure roller cylinders are fixedly installed on the pressure roller seat plate. A second dewatering pressure roller is fixedly installed at the output end of one set of pressure roller cylinders, and a first dewatering pressure roller is fixedly installed at the output end of the other set of pressure roller cylinders. An oil suction air knife is installed on the pressure roller seat plate, and a connecting pipe is connected to the oil suction air knife. The connecting pipe is connected to an adsorption mechanism.

[0008] Preferably, a corrugated baffle is fixedly installed inside the chilling water tank, the water tank inlet and water tank outlet are located on both sides of the corrugated baffle, and the chilling roller is installed inside the chilling water tank on the side near the water tank inlet.

[0009] Preferably, a fixed base is fixedly provided on the side end of the quenching water tank, a lifting cylinder is fixedly installed on the fixed base, a drive frame is fixedly connected to the output end of the lifting cylinder, and a connecting bracket for installing the quenching roller is fixedly installed on the drive frame.

[0010] Preferably, the drive frame and the connecting bracket are equipped with a drive mechanism for driving the quenching roller to rotate.

[0011] Preferably, the driving mechanism includes a drive motor fixedly installed in the drive frame, a drive wheel fixedly installed at the output end of the drive motor, the quenching roller being rotatably mounted on the connecting bracket via a rotating shaft, a driven wheel fixedly installed on the rotating shaft, and the driven wheel being connected to the drive wheel via a belt drive component.

[0012] Preferably, the belt drive component includes a drive shaft rotatably mounted on a drive frame, on which a first drive wheel and a second drive wheel are fixedly mounted. The second drive wheel is connected to the drive wheel via a drive belt, and the first drive wheel is connected to the driven wheel via a drive belt.

[0013] Preferably, the adsorption mechanism includes a gas-liquid separator, the inlet of which is connected to a connecting pipe, the upper end of which is connected to a vacuum tube, and the outlet of which is connected to a vacuum fan.

[0014] Preferably, a drain port is fixedly installed at the lower part of the gas-liquid separator, and a collector is fixedly installed inside the gas-liquid separator, the collector being located between the connecting pipe and the vacuum pipe.

[0015] Preferably, a pressure roller seat is fixedly installed at the output end of the pressure roller cylinder, and a pressure roller motor for driving the pressure roller to rotate is fixedly installed on the pressure roller seat.

[0016] Preferably, the pressure roller cylinder is equipped with an electronic control system for controlling the amount of air intake.

[0017] The beneficial effects of this utility model are:

[0018] (1) This utility model consists of two pressure rollers controlled by a cylinder. When the command is given to press down, the cylinder circulates air to press down the two pressure rollers. By controlling the air pressure in the cylinder, the tightness between the pressure rollers and the cooling roller surface can be adjusted. When the cooling roller rotates, the water and oil on the cooling roller surface are scraped off. At the same time, the vacuum fan is started and the air knife is activated. In this way, the scraped oil and water are sucked away by the air knife. As the old oil is continuously sucked away, the cooling roller surface will not form oil stains. When it is turned back to receive material, the roller surface can remain stable and clean for a long time, ensuring the film coating effect. The produced film will not have abnormalities such as large white spots, thus maintaining stable product quality.

[0019] (2) This utility model generates negative pressure by starting a vacuum fan, thereby generating suction force in the oil suction air knife. Oil and water are drawn into the connecting pipe of the air knife and then transported to the gas-liquid separator. The collector in the gas-liquid separator captures the oil and water, which eventually sink to the bottom of the tank. After reaching a certain liquid level, the oil and water are discharged from the bottom of the tank and further separated to achieve the effect of recovering white oil. At the same time, the air at the top, after the oil and water are treated, is discharged through the vacuum fan. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of a PE film chiller roller degreasing device according to this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the cooling roller of a PE film cooling roller degreasing device according to the present invention;

[0023] Figure 3 This is a schematic diagram of the quenching water tank structure of a PE film quenching roller degreasing device according to this utility model.

[0024] In the diagram: 1. Quenching roller; 2. Dewatering roller II; 3. Dewatering roller I; 4. Oil suction air knife; 5. Connecting pipe; 6. Roller cylinder; 7. Quenching water tank; 8. Water tank inlet; 9. Corrugated baffle; 10. Water tank outlet; 11. Gas-liquid separator; 12. Collector; 13. Vacuum tube; 14. Vacuum fan; 15. Drain outlet; 16. Fixed base; 17. Lifting cylinder; 18. Drive frame; 19. Connecting bracket; 20. Drive wheel; 21. Drive belt; 22. Drive shaft; 23. Drive wheel I; 24. Drive wheel II; 25. Drive belt; 26. Driven wheel; 27. Roller seat plate. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention / utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention / utility model, and not all embodiments. Based on the embodiments of the present invention / utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention / utility model.

[0026] In the description of this invention / utility model, it should be understood that the terms "upper," "lower," "left," "right," etc., indicating orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0027] In the description of this invention / utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please see Figures 1-3 As shown, this utility model is a PE film cooling roller degreasing device, including a cooling roller 1, a second dewatering roller 2 and a first dewatering roller 3, an oil suction air knife 4, and a connecting pipe 5 connected to them. The cooling roller 1 receives the cast film from the extrusion die. The cooling roller 1 rotates to put the cast film into water for cooling to form a casting sheet. When the casting sheet is glassed, the cooling roller 1 rotates out of the water again. At this time, the surface of the cooling roller 1 is covered with oil and water, which needs to be scraped off by the second dewatering roller 2 and the first dewatering roller 3. Then, after being absorbed and degreased by the oil suction air knife 4, the surface of the cooling roller rotates again to contact the cast film. This can be continuously cyclical.

[0029] Cylinders are installed at both ends of the pressure roller. Cylinder 6 controls whether the pressure roller is pressed down or raised. The cylinder has a control system that controls the air intake through a switch, thereby controlling the raising and lowering of the pressure roller. The air intake pressure is adjustable, and the pressure level controls the tightness of the contact between the pressure roller and the cooling roller surface. When the pressure roller is pressed down, the first dewatering pressure roller 3 scrapes off most of the oil and water, and then the second dewatering pressure roller 2 scrapes off the remaining oil and water, ensuring that there is no oil or water on the cooling roller surface. At the same time, the oil suction air knife system is activated to remove the scraped oil and water.

[0030] The quenching water tank 7 is equipped with an inlet 8 and an outlet 10, with a corrugated baffle 9 in between. The quenching roller 1 is placed in the quenching water tank 7. Since the casting contains white oil, the oil will stick to the surface of the quenching roller 1 during the cooling process. After being scraped off, some of the oil will enter the water. The oil in the water will overflow through the corrugated baffle 9 to the other end of the water tank and be discharged through the outlet 10. The oil is then recovered through stratification, and the water is reprocessed and recycled back to use through 8.

[0031] Oil suction air knife device, such as Figure 1 It includes a gas-liquid separator 11, a collector 12, a vacuum tube 13, a vacuum fan 14, and a drain port 15. When the vacuum fan 14 is started, the oil suction knife 5 is activated. At this time, the oil suction knife 5 can suck the oil and water scraped off the surface of the cooling roller 1 into the connecting pipe 5, and then be transported to the gas-liquid separator 11. In the separator, the water and oil are captured by the collector 12 and fall back to the bottom of the tank. After reaching a certain liquid level, the drain port 15 is opened to further recover and reuse the oil; at the same time, the air at the top is further drawn away and discharged by the vacuum fan 14 through the vacuum tube 13.

[0032] In an optional embodiment, a fixed base 16 is fixedly provided on the side end of the quench water tank 7, a lifting cylinder 17 is fixedly installed on the fixed base 16, a drive frame 18 is fixedly connected to the output end of the lifting cylinder 17, and a connecting bracket 19 for installing the quench roller 1 is fixedly installed on the drive frame 18.

[0033] In an optional embodiment, a drive mechanism for driving the quenching roller 1 to rotate is mounted on the drive frame 18 and the connecting bracket 19.

[0034] In an optional embodiment, the drive mechanism includes a drive motor fixedly installed in the drive frame 18, a drive wheel 20 fixedly installed at the output end of the drive motor, the chilling roller 1 being rotatably mounted on the connecting bracket 19 via a rotating shaft, a driven wheel 26 being fixedly installed on the rotating shaft, and the driven wheel 26 being connected to the drive wheel 20 via a belt drive component.

[0035] In an optional embodiment, the belt drive includes a drive shaft 22 rotatably mounted on a drive frame 18, on which a first drive wheel 23 and a second drive wheel 24 are fixedly mounted. The second drive wheel 24 is connected to the drive wheel 20 via a drive belt 21, and the first drive wheel 23 is connected to the driven wheel 26 via a drive belt 25.

[0036] In some specific implementations, to control the scraping effect of the pressure roller, cylinders 6 are installed at both ends of the pressure roller. These cylinders are equipped with an electronic control system, which allows for air intake control via switches, thereby controlling the lifting and lowering of the pressure roller. The amount of air intake can also be adjusted to control the tightness of contact with the chilling roller surface. Additionally, a motor is installed at one end of the pressure roller to control its rotational speed, thus avoiding excessive friction with the chilling roller surface. This achieves a good scraping effect without affecting the rotation of the chilling roller itself.

[0037] In some previous use cases, most applications used only one pressure roller, and the scraping effect was controlled by increasing the cylinder pressure of the pressure roller. Because there was only one pressure roller, in order to remove water and oil completely, the cylinder pressure had to be continuously increased. However, in reality, even if the pressure roller was in close contact with the cooling roller, the water removal effect was only average, and water and oil residues remained behind the pressure roller. At the same time, excessive pressure between the pressure roller and the cooling roller could easily cause the pressure roller to deform. In addition, the pressure roller also affected the normal use of the cooling roller, thus affecting the film application effect and product quality.

[0038] This invention provides a highly efficient solution. After the dewatering roller 3 is pressed down, most of the oil and water are scraped off. Then, the dewatering roller 2 is pressed down, and the remaining small amount of oil and water is further scraped off. The key feature of this invention is the design of an oil-absorbing air knife 4, which absorbs the high-concentration oil and water scraped off, preventing oil residue from remaining on the roller surface. Because the oil on the cooling roller is absorbed, the cooling roller 1 rotates into the cooling water tank 7 during rotation, resulting in a lower concentration of oil in the water. This further facilitates the scraping of the pressure roller. Compared to the two solutions, this invention offers significantly better oil removal and scraping effects, maintaining a good film adhesion effect for a longer period. This helps control the stability of product quality and also extends the service life of the pressure roller.

[0039] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A PE film quench roll oil removal device, characterized by, The device includes a chilling roller (1) and a chilling water tank (7). The chilling water tank (7) is provided with a water tank inlet (8) and a water tank outlet (10). The chilling roller (1) is located inside the chilling water tank (7). A pressure roller seat plate (27) is fixedly provided at the upper end of the chilling water tank (7). Two sets of pressure roller cylinders (6) are fixedly installed on the pressure roller seat plate (27). A second dewatering pressure roller (2) is fixedly installed at the output end of one set of pressure roller cylinders (6), and a first dewatering pressure roller (3) is fixedly installed at the output end of the other set of pressure roller cylinders (6). An oil suction air knife (4) is installed on the pressure roller seat plate (27). A connecting pipe (5) is connected to the oil suction air knife (4). The connecting pipe (5) is connected to the adsorption mechanism.

2. The oil removal device for quenching roll of a PE film according to claim 1, characterized in that, A corrugated baffle (9) is fixedly installed inside the chilling water tank (7). The water tank inlet (8) and water tank outlet (10) are located on both sides of the corrugated baffle (9). The chilling roller (1) is installed inside the chilling water tank (7) on the side near the water tank inlet (8).

3. The oil removal device for quenching roller of PE film according to claim 1, characterized in that, A fixed base (16) is fixedly provided on the side end of the quenching water tank (7). A lifting cylinder (17) is fixedly installed on the fixed base (16). A drive frame (18) is fixedly connected to the output end of the lifting cylinder (17). A connecting bracket (19) for installing the quenching roller (1) is fixedly installed on the drive frame (18).

4. The oil removal device for quenching roller according to claim 3, characterized in that, The drive frame (18) and the connecting bracket (19) are equipped with drive mechanisms for driving the quenching roller (1) to rotate.

5. The oil removal device for quenching roll according to claim 4, wherein The driving mechanism includes a drive motor fixedly installed in the drive frame (18), a drive wheel (20) fixedly installed at the output end of the drive motor, a chilling roller (1) rotatably installed on the connecting bracket (19) via a rotating shaft, a driven wheel (26) fixedly installed on the rotating shaft, and the driven wheel (26) being connected to the drive wheel (20) via a belt drive component.

6. The oil removal device for quenching roller according to claim 5, wherein The belt drive component includes a drive shaft (22) rotatably mounted on a drive frame (18). A drive wheel one (23) and a drive wheel two (24) are fixedly mounted on the drive shaft (22). The drive wheel two (24) is connected to the drive wheel (20) via a drive belt (21). The drive wheel one (23) is connected to the driven wheel (26) via a drive belt (25).

7. The oil removal device for quenching roller according to claim 1, wherein The adsorption mechanism includes a gas-liquid separator (11), the inlet of which is connected to a connecting pipe (5), the upper end of which is connected to a vacuum tube (13), and the outlet of which is connected to a vacuum fan (14).

8. The oil removal device for quenching roller according to claim 7, characterized in that, A drain port (15) is fixedly installed at the lower part of the gas-liquid separator (11), and a collector (12) is fixedly installed inside the gas-liquid separator (11). The collector (12) is located between the connecting pipe (5) and the vacuum pipe (13).

9. The oil removal device for quenching roller according to claim 1, wherein The output end of the pressure roller cylinder (6) is fixedly installed with a pressure roller seat, and a pressure roller motor for driving the pressure roller to rotate is fixedly installed on the pressure roller seat.

10. The oil removal device for quenching roll according to claim 1, wherein The pressure roller cylinder (6) is equipped with an electronic control system for controlling the amount of air intake.

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