A cooling device for a base film cast sheet
Patent Information
- Application Number
- CN202522089289.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-28
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-09-28
AI Technical Summary
Existing base film casting cooling devices have poor cooling effects, resulting in product warping, high crystallinity, bubbles, transverse streaks, uneven thickness, uneven surface, reduced light transmittance and gloss, as well as high energy consumption and low production capacity.
An independently configured air outlet unit is used, combined with a first fine-tuning component and a second fine-tuning component to adjust the air outlet temperature, spacing, and cooling area, thereby optimizing the cooling effect and saving energy.
It enables flexible adjustment of cooling temperature and cooling area, improves cooling efficiency, enhances the quality and mechanical properties of the base film, and reduces energy consumption.
Smart Images
Figure CN224928331U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of membrane cooling equipment technology, and in particular to a cooling device for base film casting. Background Technology
[0002] In the production of polyester base film, the raw material melts and flows out from the die head. After being cooled by the casting roller, it forms a sheet. The casting roller cools the bonding surface of the sheet with cooling water, while the non-bonding surface relies on natural cooling. The cooling effect is poor and the efficiency is low. When the speed of the machine increases, the contact time between the sheet and the casting roller is shortened, resulting in uneven cooling of the sheet. This ultimately leads to defects in the base film such as warping, high crystallinity, bubbles, transverse streaks, uneven thickness, uneven surface, and reduced light transmittance and gloss. This not only has a negative impact on the quality of the product, but also results in low production capacity.
[0003] Existing patent CN213936452U discloses a cooling device for the back side of a lithium battery separator casting film, including a cooling air unit, a blower hood, and a casting roller. The cooling air unit provides cooling air, and an air duct connects the cooling air unit and the blower hood. The blower hood has several evenly distributed air holes that blow the cooling air evenly onto the back side of the casting film on the surface of the casting roller. A temperature sensor is installed on the blower hood to detect the temperature of the casting film. This device has good cooling effect and high efficiency, improving the casting film forming quality; however, the device is bulky, has little heat dissipation space, and consumes a lot of energy.
[0004] Therefore, it is necessary to improve the cooling device for base film casting in the existing technology. Utility Model Content
[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a cooling device for base film casting. Through the independently set air outlet unit, the air outlet temperature of the air outlet unit can be flexibly adjusted to save energy. The cooling area of the air outlet unit can be adjusted and the cooling effect optimized by combining the first and second fine-tuning parts.
[0006] To achieve the above-mentioned technical effects, the technical solution of this utility model is as follows: a cooling device for base film casting, comprising casting rollers and cooling components respectively disposed on the two surfaces of the casting sheet; The cooling assembly includes: An air outlet unit, connected to a base, has an air outlet facing the casting sheet, and at least two sets are independently arranged and arranged circumferentially along the casting sheet roller; The first fine-tuning component adjusts the air outlet unit to move closer to or further away from the casting roller; The second fine-tuning component adjusts the spacing between the air outlet units along the plumb line.
[0007] A preferred technical solution is that the air outlet unit includes a shell, an air inlet, and an air outlet screen plate. The air outlet screen plate is provided with a plurality of evenly distributed air vents. The air outlet screen plate divides the inner cavity of the shell into an air inlet cavity and an air outlet cavity. The air inlet is connected to the air inlet cavity and the inflation device, and the air outlet is connected to the air outlet cavity.
[0008] A preferred technical solution is that the air outlet is elongated, the extension direction of the air outlet is consistent with the axial direction of the casting roller, the extension direction of the air outlet screen plate is consistent with the extension direction of the air outlet, the air outlet screen plate is obliquely arranged in the inner cavity of the outer shell, and the air vents of the air outlet screen plate face the air outlet.
[0009] A preferred technical solution is that the first fine-tuning component includes a first guide and a limiting component. The extension direction of the first guide is perpendicular to the axial direction of the casting roller, and the air outlet unit moves reciprocally along the first guide. The limiting component is used to fix the relative position between the air outlet unit and the base, and to adjust the distance between the air outlet unit and the casting roller.
[0010] A preferred technical solution is that the first guide member is one or a combination of a concave track and a convex track, the extension end of the first guide member is open, the side wall of the first guide member is provided with a limiting hole, and the limiting member and the limiting hole are in concave-convex fit.
[0011] A preferred technical solution is that the second fine-tuning component includes a support base, a lead screw, a threaded rod, and a driving component. The support base is in a concave-convex fit with the first fine-tuning component. The lead screws are arranged in pairs, and the two ends of the paired lead screws are perpendicularly engaged with the threaded rod. The driving component is connected to the threaded rod.
[0012] A preferred technical solution is that the air outlet unit further includes a support rod, one end of which is provided with a limiting groove that mates with the outer shell, and the other end is threadedly connected to the lead screw.
[0013] A preferred technical solution is that the second fine-tuning component and the air outlet unit are arranged in a one-to-one correspondence, and the height of the lead screw in the second fine-tuning component decreases sequentially along the extension direction close to the first fine-tuning component.
[0014] A preferred technical solution is that the support link includes a first link, a second link, and an angle limiting member. The first link and the second link are connected by a first rotating shaft. The first link is threaded to the lead screw, and the second link is fixedly connected to the housing. The angle limiting member is used to adjust the included angle between the first link and the second link.
[0015] A preferred technical solution is that the base is provided with casters and locking bolts at its bottom.
[0016] The advantages and beneficial effects of this invention are as follows: By using independently designed air outlet units, the air outlet temperature can be flexibly adjusted according to the different temperatures after cooling in the direction of film flow of the cast sheet, thereby saving energy. Combined with the first fine-tuning component to adjust the distance between the air outlet unit and the cast sheet roller, the path of air outlet to the surface of the cast sheet is shortened. Combined with the second fine-tuning component to adjust the distance between the air outlet units, the cooling area of the cast sheet along the film flow direction and the heat dissipation space of the cast sheet are adjusted, further saving energy and optimizing the cooling effect. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the cooling device for the base film casting of this utility model; Figure 2 This is a perspective view of the cooling components in the cooling device for base film casting of this utility model; Figure 3 This is another perspective view of the cooling component in the cooling device for base film casting of this utility model; Figure 4 This is a schematic diagram of the air outlet unit in the cooling device for base film casting of this utility model; Figure 5 yes Figure 4 A schematic diagram of the cross-section of the exhaust unit; Figure 6 This is a schematic diagram of the supporting link in the preferred embodiment.
[0018] In the diagram: 1. Casting roller; 2. Cooling assembly; 3. Air outlet unit; 4. First fine-tuning component; 5. Second fine-tuning component; 20. Moving wheel; 21. Base; 30. Outer shell; 31. Air outlet; 32. Air inlet; 33. Supporting connecting rod; 34. Air outlet screen plate; 40. Limiting hole; 41. First guide component; 42. Limiting component; 50. Support base; 51. Screw; 52. Lead screw; 53. Driving component; 330. Limiting groove; 331. First connecting rod; 332. Second connecting rod; 334. Angle limiting component; 340. Vent hole. Detailed Implementation
[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.
[0020] The terms “surface,” “end,” and “bottom” are used with reference to the normal operating state of the cooling device for the base film casting and are only for the convenience of describing this utility model and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0021] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0022] like Figures 1-6 As shown, the cooling device for the base film casting includes a casting roller 1 and a cooling assembly 2 respectively disposed on the two surfaces of the casting; wherein, the cooling assembly 2 includes an air outlet unit 3, a first fine-tuning component 4 and a second fine-tuning component 5: the air outlet unit 3 is connected to the base 21 and has an air outlet 31 facing the casting, and at least two sets are independently arranged and arranged along the circumference of the casting roller 1; the first fine-tuning component 4 adjusts the air outlet unit 3 to be closer to or farther away from the casting roller 1; the second fine-tuning component 2 adjusts the spacing between the air outlet units 3 along the plumb line.
[0023] The raw material for casting is molten and extruded through a die head, cast in a casting machine, and then cooled by casting roller 1. Usually, the temperature of the casting on the feed side of casting roller 1 is high, and the temperature of the casting on the discharge side is slightly lower. If the outlet temperature of the cooling device is the same, it will easily lead to energy waste.
[0024] Therefore, by using independently set air outlet unit 3, the air outlet temperature of air outlet unit 3 can be flexibly adjusted according to the different temperatures after cooling in the film-moving direction of the cast sheet, thereby saving energy; combined with the first fine-tuning component 4 to adjust the distance between air outlet unit 3 and cast sheet roller 1, the path of air outlet to the surface of the cast sheet is shortened; combined with the second fine-tuning component 5 to adjust the distance between air outlet units 3, the cooling area of the cast sheet along the film-moving direction and the heat dissipation space of the cast sheet are adjusted, thereby further saving energy and optimizing the cooling effect.
[0025] The base 21 is equipped with a moving wheel 20 and a locking bolt (not shown) at the bottom. The locking bolt is used to limit the position of the base 21 and prevent the base 21 from moving during operation of the air outlet unit 3. As a result, the cooling device for the base film casting can be configured with different casting rollers, move freely, or be easy to store when not in use to prevent it from occupying space.
[0026] like Figures 4-5As shown, to simplify the structure of the air outlet unit 3, the air outlet unit 3 includes a housing 30, an air inlet 32, and an air outlet screen plate 34. The air outlet screen plate 34 is provided with several evenly distributed air vents 340, dividing the inner cavity of the housing 30 into an air inlet chamber and an air outlet chamber. The air inlet 31 is connected to the air inlet chamber and the inflation device. Each inflation device corresponds to one of the air outlet units 3, and the inflation devices provide different temperatures. The air outlet temperature of the air outlet unit 3 near the film entry side of the casting roller 1 is 20~23℃, and the air outlet temperature of the air outlet unit 3 near the film exit side of the casting roller 1 is 25~26℃. The air outlet 31 is connected to the air outlet chamber. The outer contour of the outer shell 30 is of arbitrary geometric shape. For ease of installation and structural stability, the outer shell 30 is a cuboid. The extension direction of the exhaust sieve plate 34 is consistent with the extension direction of the outer shell 30. The exhaust sieve plate 34 is obliquely arranged in the inner cavity of the outer shell 30, forming a stable triangular structure in cross-section. The evenly distributed vent holes 340 disperse and spread the incoming gas and blow it out evenly, promoting a consistent cooling temperature of the exhaust gas from the same exhaust unit 3, ensuring the quality and performance of the cast sheet. Furthermore, the exhaust port 31 is elongated and its extension direction is consistent with the axial direction of the casting roller 1. The extension direction of the exhaust sieve plate 34 is consistent with the extension direction of the exhaust port 31. The exhaust sieve plate 34 is obliquely arranged in the inner cavity of the outer shell 30, and the vent holes 340 of the exhaust sieve plate 34 face the exhaust port 31. The elongated exhaust port 31 is consistent with the transverse direction of the cast sheet, ensuring the mechanical properties of the cast sheet in both the longitudinal and transverse directions, as well as the flatness of the film.
[0027] like Figures 2-3 As shown, to optimize the structure of the first fine-tuning component 4, the first fine-tuning component 4 includes a first guide component 41 and a limiting component 42. The extension direction of the first guide component 41 is perpendicular to the axial direction of the casting roller 1, and the air outlet unit 3 reciprocates along the first guide component 41. The limiting component 42 is used to fix the relative position between the air outlet unit 3 and the base 21, and to adjust the distance between it and the casting roller 1. Furthermore, in order to improve the fixing firmness between the air outlet unit 3 and the base 21, simplify the structure, and facilitate the installation or disassembly of the air outlet unit 3, the first guide component 41 is one or a combination of a concave track and a convex track. The extension end of the first guide component 41 is open, and the side wall of the first guide component 41 is provided with a limiting hole 40. The limiting component 42 and the limiting hole 40 are in a concave-convex fit. With the extension end open, i.e. not sealed, the air outlet unit 3 and the first guide 41 are easy to install and cooperate. When moved to the corresponding working position, the limiting member 42 and the limiting hole 40 are engaged in a concave-convex fit. The operation is simple, and the number of air outlet units 3 can be set according to the requirements.
[0028] To optimize the structure of the second fine-tuning component 5, the second fine-tuning component 5 includes a support base 50, a lead screw 52, a screw 51, and a drive component 53. The support base 50 is in a concave-convex fit with the first fine-tuning component 4. The lead screws 52 are arranged in pairs, and the two ends of the paired lead screws 52 are perpendicularly engaged with the two ends of the screw 51. The drive component 53 is connected to the screw 51. For the sake of simplicity, the threads of the lead screw 52 and the screw 51 are not shown in the figure. The drive component 53 synchronously drives the screw 51, and the screw 51 and the lead screw 52 are perpendicularly engaged through helical gears, thereby synchronously transmitting power and making the air outlet unit 3 rise and fall smoothly. Furthermore, the air outlet unit 3 also includes a support connecting rod 33. One end of the support connecting rod is provided with a limiting groove 330 that is in a concave-convex fit with the outer shell 30, and the other end is threadedly connected to the lead screw 52.
[0029] In some preferred embodiments, in order to ensure that the air outlet path of the air outlet unit 3 is unobstructed and to prevent mutual obstruction from affecting the air volume and air uniformity, the second fine-tuning component 5 is further provided in a one-to-one correspondence with the air outlet unit 3, and the height of the lead screw 52 in the second fine-tuning component 5 decreases sequentially along the extension direction close to the first fine-tuning component 4.
[0030] like Figure 6 As shown, in some other preferred embodiments, the support link 33 includes a first link 331, a second link 332, and an angle limiting member 334. The first link 331 and the second link 332 are connected by a first rotating shaft. The first link 331 is threaded to the lead screw 52, and the second link 332 is fixedly connected to the housing 30. The angle limiting member 334 is used to adjust the included angle between the first link 331 and the second link 332. The angle limiting component 334 is a cylinder. The first connecting rod 331 and the second connecting rod 332 are rotatably connected. The included angle between the first connecting rod 331 and the second connecting rod 332 is adjusted by the cylinder. That is, one end of the cylinder is fixedly connected to the first connecting rod 331, and the other end is rotatably connected to the second connecting rod 332 through the second rotating shaft. The axes of the first rotating shaft and the second rotating shaft are consistent. It can not only adjust the orientation of the air outlet 31 and the casting plate, but also expand the sweeping angle of the air outlet during the cooling process, increase the cooling area and improve the cooling effect.
[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A cooling device for a base film casting, comprising a casting roller and a cooling assembly disposed on two surfaces of the casting; Its features are, The cooling assembly includes: An air outlet unit, connected to a base, has an air outlet facing the casting sheet, and at least two sets are independently arranged and arranged circumferentially along the casting sheet roller; The first fine-tuning component adjusts the air outlet unit to move closer to or further away from the casting roller; The second fine-tuning component adjusts the spacing between the air outlet units along the plumb line.
2. The cooling device for base film casting according to claim 1, characterized in that, The air outlet unit includes a housing, an air inlet, and an air outlet screen plate. The air outlet screen plate is provided with a number of evenly distributed air vents. The air outlet screen plate divides the inner cavity of the housing into an air inlet cavity and an air outlet cavity. The air inlet is connected to the air inlet cavity and the inflation device, and the air outlet is connected to the air outlet cavity.
3. The cooling device for base film casting according to claim 2, characterized in that, The air outlet is elongated and narrow, and its extension direction is consistent with the axial direction of the casting roller. The extension direction of the air outlet screen plate is consistent with the extension direction of the air outlet. The air outlet screen plate is obliquely arranged in the inner cavity of the outer shell, and the air vents of the air outlet screen plate face the air outlet.
4. The cooling device for base film casting according to claim 2, characterized in that, The first fine-tuning component includes a first guide and a limiting component. The extension direction of the first guide is perpendicular to the axial direction of the casting roller, and the air outlet unit moves reciprocally along the first guide. The limiting member is used to fix the relative position between the air outlet unit and the base, and to adjust the distance between it and the casting roller.
5. The cooling device for base film casting according to claim 4, characterized in that, The first guide is one or a combination of concave and convex tracks. The extended end of the first guide is open. The side wall of the first guide is provided with a limiting hole. The limiting member and the limiting hole are in concave-convex fit.
6. The cooling device for base film casting according to claim 2 or 5, characterized in that, The second fine-tuning component includes a support base, a lead screw, a threaded rod, and a driving component. The support base is in a concave-convex fit with the first fine-tuning component. The lead screws are arranged in pairs, and the two ends of the paired lead screws are perpendicularly engaged with the threaded rod. The driving component is connected to the threaded rod.
7. The cooling device for base film casting according to claim 6, characterized in that, The air outlet unit also includes a support rod, one end of which is provided with a limiting groove that mates with the outer shell, and the other end is threadedly connected to the lead screw.
8. The cooling device for base film casting according to claim 6, characterized in that, The second fine-tuning component is configured in a one-to-one correspondence with the air outlet unit component, and the height of the lead screw in the second fine-tuning component decreases sequentially along the extension direction close to the first fine-tuning component.
9. The cooling device for base film casting according to claim 7, characterized in that, The support link includes a first link, a second link, and an angle limiting component. The first link and the second link are connected by a first rotating shaft. The first link is threaded to the lead screw, and the second link is fixedly connected to the housing. The angle limiting component is used to adjust the included angle between the first link and the second link.
10. The cooling device for base film casting according to claim 1, characterized in that, The base is equipped with casters and locking bolts at its bottom.