PVB film shaping device and PVB film shaping method
By using a temperature-controlled first cooling component, heating component, and second cooling component in a PVB film setting device, rapid freezing and stress release of PVB film are achieved, solving the problems of high energy consumption and poor setting effect of traditional setting devices, improving setting quality and reducing film shrinkage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- KANGCHEN PLASTIC PRODUCTS (SHENZHEN) CO LTD
- Filing Date
- 2023-08-28
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional PVB film setting devices have high energy consumption, high requirements for water quality and water circulation cooling, and it is difficult to achieve uniform cooling on the film surface, resulting in poor setting effect and problems such as large film shrinkage and easy water absorption.
A shaping device comprising a first cooling component, a heating component, and a second cooling component is used. By controlling the temperature and contact time of each component, the PVB film can be rapidly frozen and shaped, stress-relieving, and finally cooled and shaped, reducing energy consumption and protecting the surface pattern.
While reducing energy consumption, it protects the film surface pattern from being stretched and damaged, reduces the static shrinkage rate of the film, and improves the setting effect.
Smart Images
Figure CN117087134B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of PVB film production technology, and in particular to a PVB film setting device and a PVB film setting method. Background Technology
[0002] In the production process of PVB (Polyvinyl butyral) film, after the PVB film exits the mold, it needs to be cooled and shaped using a PVB film shaping device. Currently, the most common method is the water immersion process, which involves immersing the PVB film that has come out of the mold lip into water for cooling.
[0003] Traditional PVB film setting equipment consumes a lot of energy (electricity and water), has high requirements for water quality in the water tank and water circulation cooling, requires frequent drainage and replacement, and has high control requirements for devices that remove water from the surface of PVB film, making it difficult to control the moisture content of PVB film. Summary of the Invention
[0004] This application provides a PVB film setting device and a PVB film setting method, which can reduce energy consumption while cooling and setting PVB film.
[0005] In a first aspect, embodiments of this application provide a PVB film shaping device for cooling and shaping PVB film extruded from a mold outlet. The PVB film shaping device includes a first cooling component, a heating component, and a second cooling component. The PVB film is sequentially wound around the first cooling component, the heating component, and the second cooling component. The surface of the first cooling component that contacts the PVB film has a temperature of 0°C to -5°C, the surface of the heating component that contacts the PVB film has a temperature of 30°C to 40°C, and the surface of the second cooling component that contacts the PVB film has a temperature of 15°C to 20°C.
[0006] In some embodiments, the temperature of the surface of the first cooling component that contacts the PVB film is -5°C, the temperature of the surface of the heating component that contacts the PVB film is 40°C, and the temperature of the surface of the second cooling component that contacts the PVB film is 15°C.
[0007] In some embodiments, the first cooling assembly includes at least two first cooling rollers, with the opposite sides of the PVB film contacting the roller surfaces of two of the first cooling rollers respectively.
[0008] In some embodiments, the surface of the first cooling roller is frosted.
[0009] In some embodiments, the temperature difference between the two ends of the first cooling roller is 0°C to 2°C.
[0010] In some embodiments, the heating assembly includes at least two heating rollers, with the opposite sides of the PVB film respectively contacting the roller surfaces of two of the heating rollers; and / or, the second cooling assembly includes at least two second cooling rollers, with the opposite sides of the PVB film respectively contacting the roller surfaces of two of the second cooling rollers.
[0011] In some embodiments, the second cooling assembly includes at least two second cooling rollers, the PVB film being wound around the second cooling rollers, and the roller surfaces of the second cooling rollers being mirror-like.
[0012] In some embodiments, the distance between the surface of the first cooling component that contacts the PVB film and the outlet is 0 to 10 mm.
[0013] Secondly, embodiments of this application provide a PVB film setting method, using the PVB film setting apparatus as described in the first aspect, the PVB film setting method comprising:
[0014] The PVB film is sequentially wound around the first cooling component, the heating component, and the second cooling component;
[0015] The PVB film is cooled and shaped sequentially using the first cooling component, the heating component, and the second cooling component.
[0016] In some embodiments, the step of sequentially cooling and shaping the PVB film using the first cooling component, the heating component, and the second cooling component includes:
[0017] The first cooling component is used to cool and shape the PVB film, and the contact time between the first cooling component and the PVB film is 9s to 11s.
[0018] The heating component is used to cool and shape the PVB film, and the contact time between the heating component and the PVB film is 11s to 13s.
[0019] The second cooling component is used to cool and shape the PVB film, and the contact time between the second cooling component and the PVB film is 9 to 11 seconds.
[0020] The PVB film shaping device provided in this application has the following advantages: Since the PVB film shaping device includes a first cooling component, a heating component, and a second cooling component, the PVB film is sequentially wound around the first cooling component, the heating component, and the second cooling component. The temperature of the surface of the first cooling component that contacts the PVB film is 0°C to -5°C, the temperature of the surface of the heating component that contacts the PVB film is 30°C to 40°C, and the temperature of the surface of the second cooling component that contacts the PVB film is 15°C to 20°C. Therefore, the PVB film extruded from the mold outlet can be first quick-frozen and shaped by the first cooling component, then stress-released by the second cooling component, and finally cooled and shaped by the second cooling component, thus completing the PVB film shaping process. This not only reduces energy consumption while cooling and shaping the PVB film, but also protects the surface pattern of the PVB film from being stretched and damaged.
[0021] The advantages of the PVB film setting method provided in this application compared to the prior art are similar to the advantages of the PVB film setting device provided in this application compared to the prior art, and will not be repeated here. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the structure of a PVB film setting device in one embodiment of this application;
[0024] Figure 2 yes Figure 1 A schematic diagram of the adjustment components in the PVB film setting device shown;
[0025] Figure 3 yes Figure 2 A magnified view of part A of the adjustment component shown;
[0026] Figure 4 This is a flowchart of a PVB film setting method in one embodiment of this application.
[0027] The markings in the diagram mean:
[0028] 100. PVB film setting device;
[0029] 10. First cooling assembly; 11. First cooling roller;
[0030] 20. Heating assembly; 21. Heating roller;
[0031] 30. Second cooling assembly; 31. Second cooling roller;
[0032] 40. Adjustment component; 41. Fixing base; 42. Moving part; 421. Adjustment elongated hole; 43. Fastener;
[0033] 50. Limiting component; 51. Connector; 52. Limiting component;
[0034] 60. Bracket;
[0035] 200. Mold; 210. Discharge port;
[0036] 300, PVB film. Detailed Implementation
[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0038] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0039] Furthermore, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0040] In this specification, references to "one embodiment," "some embodiments," or simply "embodiment" mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. Furthermore, in one or more embodiments, specific features, structures, or characteristics may be combined in any suitable manner.
[0041] To illustrate the technical solution of this application, the following description is provided in conjunction with specific accompanying drawings and embodiments.
[0042] Traditional PVB film setting equipment consumes a lot of energy (electricity and water), has high requirements for water quality in the water tank and water circulation cooling, requires frequent drainage and replacement, and has high control requirements for devices that remove water from the surface of PVB film, making it difficult to control the moisture content of PVB film.
[0043] Another method is to cool the surface of the PVB film only through cooling rollers, but this method has the problem of poor shaping effect, large shrinkage and easy water absorption in the later stage, which affects the adhesion between the PVB film and the glass.
[0044] To solve the above problems, please refer to Figure 1 This application provides a PVB film shaping device 100 for cooling and shaping PVB film 300 extruded through the outlet 210 of the mold 200. The PVB film shaping device 100 includes a first cooling component 10, a heating component 20, and a second cooling component 30.
[0045] PVB film 300 is sequentially wound around a first cooling assembly 10, a heating assembly 20, and a second cooling assembly 30; wherein, the temperature of the surface of the first cooling assembly 10 in contact with the PVB film 300 is 0°C to -5°C, the temperature of the surface of the heating assembly 20 in contact with the PVB film 300 is 30°C to 40°C, and the temperature of the surface of the second cooling assembly 30 in contact with the PVB film 300 is 15°C to 20°C.
[0046] Please refer to this as well. Figure 4 The PVB film setting method for cooling the PVB film 300 using the aforementioned PVB film setting device 100 includes:
[0047] S100: The PVB film 300 is sequentially wound around the first cooling component 10, the heating component 20, and the second cooling component 30.
[0048] S200: The PVB film 300 is cooled and shaped sequentially using the first cooling component 10, the heating component 20, and the second cooling component 30.
[0049] It should be noted that both the first cooling component 10 and the second cooling component 30 can be cooling rollers, etc. The surface of the first cooling component 10 that contacts the PVB film 300 and the surface of the second cooling component 30 that contacts the PVB film 300 are both the roller surface of the cooling roller. The heating component 20 can be a heating roller 21, etc. The surface of the heating component 20 that contacts the PVB film 300 is the roller surface of the heating roller 21.
[0050] It should also be noted that the temperature of the PVB film 300 extruded through the outlet 210 of the mold 200 is approximately 200 degrees Celsius. It first comes into contact with the first cooling component 10 at 0°C to -5°C, and the surface pattern of the PVB film 300 is rapidly frozen and shaped. After the surface pattern of the PVB film 300 is rapidly frozen and shaped at high temperature, the PVB film 300 will be in a taut state, and its internal stress has not been released. This will easily lead to large shrinkage and water absorption problems later. At this time, it comes into contact with the heating component 20 at 30°C to 40°C. According to the principle of thermal expansion and contraction, the surface of the PVB film 300 will relax, thereby fully releasing its internal stress and making it less prone to shrinkage and water absorption later. Finally, the PVB film 300 with fully released stress comes into contact with the second cooling component 30 at 15°C to 20°C for cooling and shaping.
[0051] The PVB film setting device 100 provided in this application embodiment includes a first cooling component 10, a heating component 20, and a second cooling component 30. The PVB film 300 is sequentially wound around the first cooling component 10, the heating component 20, and the second cooling component 30. The temperature of the surface of the first cooling component 10 in contact with the PVB film 300 is 0°C to -5°C, the temperature of the surface of the heating component 20 in contact with the PVB film 300 is 30°C to 40°C, and the temperature of the surface of the second cooling component 30 in contact with the PVB film 300 is... The surface temperature is 15℃ to 20℃, so the PVB film 300 extruded through the outlet 210 of the mold 200 can be quickly frozen and shaped by the first cooling component 10, then stress-relieving by the second cooling component 30, and finally cooled and shaped by the second cooling component 30 to complete the shaping process of the PVB film 300. This not only reduces energy consumption while cooling and shaping the PVB film 300, but also protects the surface pattern of the PVB film 300 from being stretched and damaged, reduces the static shrinkage rate of the PVB film 300, and makes it less prone to shrinkage and water absorption in the later stage.
[0052] The PVB film setting device 100 provided in this application embodiment significantly reduces the consumption of electricity and water compared to the water-cooling setting process, and the production process is more convenient and simple. The surface roughness of the produced PVB film 300, with Ra value (3-7), Rz value (25-45), and Rpc value (≥40), can achieve the same effect as the water-cooling setting process.
[0053] In some embodiments, in order to ensure that the contact time between the PVB film 300 and the first cooling component 10, the heating component 20, and the second cooling component 30 meets the requirements for cooling and stress relief, the PVB film 300 is sequentially cooled and shaped using the first cooling component 10, the heating component 20, and the second cooling component 30, including:
[0054] First, the PVB film 300 is cooled and shaped using the first cooling component 10, and the contact time between the first cooling component 10 and the PVB film 300 is 9 to 11 seconds.
[0055] Next, the heating component 20 is used to cool and shape the PVB film 300, and the contact time between the heating component 20 and the PVB film 300 is 11 to 13 seconds.
[0056] Finally, the second cooling component 30 is used to cool and shape the PVB film 300. The contact time between the second cooling component 30 and the PVB film 300 is 9 to 11 seconds.
[0057] By adopting the above solution, energy consumption can be reduced while cooling and shaping the PVB film 300. It can also protect the surface pattern of the PVB film 300 from being stretched and damaged, and reduce the static shrinkage rate of the PVB film 300.
[0058] In this embodiment, firstly, the first cooling component 10 is used to cool and shape the PVB film 300, and the contact time between the first cooling component 10 and the PVB film 300 is 10 seconds.
[0059] Next, the heating component 20 is used to cool and shape the PVB film 300, and the contact time between the heating component 20 and the PVB film 300 is 12 seconds.
[0060] Finally, the second cooling component 30 is used to cool and shape the PVB film 300, and the contact time between the second cooling component 30 and the PVB film 300 is 10 seconds.
[0061] In some embodiments, the temperature of the surface of the first cooling component 10 in contact with the PVB film 300 is -5°C, the temperature of the surface of the heating component 20 in contact with the PVB film 300 is 40°C, and the temperature of the surface of the second cooling component 30 in contact with the PVB film 300 is 15°C.
[0062] By adopting the above solution, the surface pattern of the PVB film 300 can be frozen and shaped more quickly when cooled, the internal stress of the PVB film 300 can be released more fully, and the second cooling component 30 can be used to cool and shape the PVB film 300 more quickly.
[0063] Please refer to Figure 1 In some embodiments, the first cooling assembly 10 includes at least two first cooling rollers 11, with the opposite sides of the PVB film 300 contacting the roller surfaces of two of the first cooling rollers 11 respectively.
[0064] By adopting the above scheme, the surface patterns on both opposite sides of the PVB film 300 can be rapidly frozen and shaped using the first cooling component 10.
[0065] Optionally, the surface of the first cooling roller 11 is frosted. This setting allows for better freeze-setting of the surface pattern of the PVB film 300.
[0066] Optionally, the temperature difference between the two ends of the first cooling roller 11 is 0°C to 2°C. This allows for a more uniform freeze-setting of the surface pattern of the PVB film 300.
[0067] In this embodiment, the first cooling component 10 includes two first cooling rollers 11. One of the first cooling rollers 11 is a double-inlet double-outlet frosted roller with a specification of Ф200*2500mm, which first contacts the PVB film 300. The other first cooling roller 11 is a double-inlet double-outlet frosted roller with a specification of Ф400*2500mm, which then contacts the PVB film 300.
[0068] Please refer to Figure 1 In some embodiments, the heating assembly 20 includes at least two heating rollers 21, with a PVB film 300 wound around the heating rollers 21, and the opposite sides of the PVB film 300 contacting the roller surfaces of two of the heating rollers 21 respectively.
[0069] By adopting the above solution, the heating component 20 can be used to simultaneously release stress on the surface patterns of both opposite sides of the PVB film 300.
[0070] Optionally, the second cooling assembly 30 includes at least two second cooling rollers 31, with the opposite sides of the PVB film 300 respectively contacting the roller surfaces of two of the second cooling rollers 31. By adopting the above scheme, the second cooling assembly 30 can be used to simultaneously cool and shape the opposite sides of the PVB film 300.
[0071] Optionally, the surface of the second cooling roller 31 that contacts the PVB film 300 is mirror-finished. This configuration allows for better cooling and shaping of the PVB film 300.
[0072] In this embodiment, the heating assembly 20 includes three heating rollers 21, each with a specification of Ф400*2500mm. The surface temperature of the heating rollers 21 can be controlled and adjusted using a mold temperature controller.
[0073] The second cooling assembly 30 includes two second cooling rollers 31. The specifications of the second cooling rollers 31 are Ф300*2500mm mirror cooling rollers, and the roller surface temperature of the second cooling rollers 31 can be adjusted by using a chiller.
[0074] In some embodiments, the distance between the surface of the first cooling assembly 10 that contacts the PVB film 300 and the outlet 210 is 0 to 10 mm.
[0075] By adopting the above method, the surface pattern of PVB film 300 can be frozen and shaped more quickly, and its surface pattern can be crystallized.
[0076] Please refer to Figure 1 and Figure 2 In some embodiments, the PVB film setting device 100 further includes an adjustment component 40 for adjusting the distance between the outlet 210 and the first cooling component 10.
[0077] By adopting the above scheme, it is convenient to adjust the distance between the discharge port 210 and the first cooling component 10.
[0078] Optionally, the adjusting component 40 may include a hydraulic cylinder or a pneumatic cylinder, etc.
[0079] Please refer to this as well. Figure 3 In this embodiment, the adjustment assembly 40 includes a fixed base 41, a movable member 42, and a fastener 43. The fixed base 41 has a connecting hole (not shown in the figure); the movable member 42 is connected to the first cooling assembly 10, and the movable member 42 has an adjusting elongated hole 421. The length direction of the adjusting elongated hole 421 (e.g., ...) Figure 3 The arrangement direction (up and down) is parallel to the discharge port 210 and the first cooling component 10 (e.g., the direction between the top and bottom) Figure 3 (Up and down direction); Fastener 43 is fitted through the connecting hole and the adjusting elongated hole 421 to connect the fixed seat 41 and the moving part 42 together, and the fastener 43 is clearance fitted with the adjusting elongated hole 421.
[0080] It is understandable that the connecting hole can be a through hole or a threaded hole. When the connecting hole is a through hole, the fastener 43 can be a bolt. When the connecting hole is a threaded hole, the fastener 43 can be a bolt or a screw.
[0081] By adopting the above scheme, the structure of the adjusting component 40 can be made relatively simple, and the distance between the discharge port 210 and the first cooling component 10 can be easily adjusted (e.g., along the...). Figure 3 (Distance in the vertical direction).
[0082] Optionally, the PVB film setting device 100 further includes a limiting component 50, which includes a connector 51 and a limiting component 52. The connector 51 is fixedly connected to the fixing base 41, and a connecting hole (not shown in the figure) is provided on the connector 51. The limiting component 52 passes through the limiting hole and is threadedly engaged with the limiting hole. The axis of the limiting hole is parallel to the arrangement direction of the discharge port 210 and the first cooling component 10 (e.g., Figure 3(Up and down direction), the limiting member 52 is connected to the moving member 42. With this configuration, when the fixed base 41 and the moving member 42 are connected together by the fastener 43 through the connecting hole and the adjusting elongated hole 421, the limiting member 50 further restricts the position of the moving member 42 in the arrangement direction of the discharge port 210 and the first cooling component 10, and prevents the fastener 43 from moving arbitrarily in the adjusting elongated hole 421 along the arrangement direction of the discharge port 210 and the first cooling component 10, thus affecting the normal use of the first cooling component 10.
[0083] It is understandable that the limiting component 52 can be a screw, bolt, or stud, etc.
[0084] Optionally, the PVB film setting device 100 also includes a bracket 60, on which the first cooling component 10, the heating component 20 and the second cooling component 30 are all mounted.
[0085] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.
Claims
1. A PVB film setting device for cooling and setting PVB film extruded from a mold outlet, characterized in that, The PVB film setting device includes a first cooling component, a heating component, and a second cooling component. The PVB film is sequentially wound around the first cooling component, the heating component, and the second cooling component. The temperature of the surface of the first cooling component in contact with the PVB film is 0°C to -5°C, so that the surface pattern of the PVB film is rapidly frozen and set. The temperature of the surface of the heating component in contact with the PVB film is 30°C to 40°C, so as to release the internal stress of the PVB film. The temperature of the surface of the second cooling component in contact with the PVB film is 15°C to 20°C, so as to cool and set the PVB film.
2. The PVB film setting device according to claim 1, characterized in that, The temperature of the surface of the first cooling component that comes into contact with the PVB film is -5°C, the temperature of the surface of the heating component that comes into contact with the PVB film is 40°C, and the temperature of the surface of the second cooling component that comes into contact with the PVB film is 15°C.
3. The PVB film setting device according to claim 1, characterized in that, The first cooling assembly includes at least two first cooling rollers, with the opposite sides of the PVB film respectively contacting the roller surfaces of two of the first cooling rollers.
4. The PVB film setting device according to claim 3, characterized in that, The surface of the first cooling roller is frosted.
5. The PVB film setting device according to claim 3, characterized in that, The temperature difference between the two ends of the first cooling roller is 0°C to 2°C.
6. The PVB film setting device according to claim 1, characterized in that, The heating assembly includes at least two heating rollers, with the opposite sides of the PVB film respectively contacting the roller surfaces of two of the heating rollers; and / or, the second cooling assembly includes at least two second cooling rollers, with the opposite sides of the PVB film respectively contacting the roller surfaces of two of the second cooling rollers.
7. The PVB film setting device according to claim 6, characterized in that, The second cooling assembly includes at least two second cooling rollers, the PVB film is wound around the second cooling rollers, and the roller surface of the second cooling rollers is mirror-like.
8. The film setting apparatus according to any one of claims 1 to 7, characterized in that, The distance between the surface of the first cooling component that contacts the PVB film and the outlet is 0 to 10 mm.
9. A method for setting PVB film, using the PVB film setting apparatus as described in any one of claims 1 to 8, characterized in that, The PVB film setting method includes: The PVB film is sequentially wound around the first cooling component, the heating component, and the second cooling component; The PVB film is cooled and shaped sequentially using the first cooling component, the heating component, and the second cooling component.
10. The PVB film setting method according to claim 9, characterized in that, The step of sequentially cooling and shaping the PVB film using the first cooling component, the heating component, and the second cooling component includes: The first cooling component is used to cool and shape the PVB film, and the contact time between the first cooling component and the PVB film is 9s to 11s. The heating component is used to cool and shape the PVB film, and the contact time between the heating component and the PVB film is 11s to 13s. The second cooling component is used to cool and shape the PVB film, and the contact time between the second cooling component and the PVB film is 9 to 11 seconds.