CN-117087134-B - PVB film shaping device and PVB film shaping method

Abstract

The application relates to the technical field of PVB film production and discloses a PVB film shaping device and a PVB film shaping method, wherein the PVB film shaping device comprises a first cooling component, a heating component and a second cooling component, the PVB film is sequentially wound on the first cooling component, the heating component and the second cooling component, the temperature of the surface of the first cooling component, which is used for being contacted with the PVB film, is 0-5 ℃, the temperature of the surface of the heating component, which is used for being contacted with the PVB film, is 30-40 ℃, and the temperature of the surface of the second cooling component, which is used for being contacted with the PVB film, is 15-20 ℃. The PVB film shaping device provided by the application can be used for cooling and shaping the PVB film and reducing energy consumption.

Inventors

• LI SHENGGEN
• GAN XIAOHE
• Ma yuqiao
• PU ZHIGUO
• Ba Junmin
• CHEN XILIANG

Assignees

• 信义汽车玻璃(深圳)有限公司

Dates

Publication Date

20260512

Application Date

20230828

Claims (10)

1. 1. The PVB film shaping device is used for cooling and shaping PVB film extruded through a discharge hole of a die and is characterized by comprising a first cooling component, a heating component and a second cooling component, wherein the PVB film is sequentially wound on the first cooling component, the heating component and the second cooling component, the temperature of the surface of the first cooling component, which is used for being contacted with the PVB film, is 0-5 ℃ so that the surface pattern of the PVB film is shaped by rapid freezing, the temperature of the surface of the heating component, which is used for being contacted with the PVB film, is 30-40 ℃ so as to release the internal stress of the PVB film, and the temperature of the surface of the second cooling component, which is used for being contacted with the PVB film, is 15-20 ℃ so as to cool and shape the PVB film.
2. 2. The PVB film sizing device of claim 1, wherein the first cooling assembly is at a temperature of-5 ℃ for a surface in contact with the PVB film, the heating assembly is at a temperature of 40 ℃ for a surface in contact with the PVB film, and the second cooling assembly is at a temperature of 15 ℃ for a surface in contact with the PVB film.
3. 3. The PVB film sizing device of claim 1, wherein the first cooling assembly comprises at least two first cooling rollers, and wherein opposite sides of the PVB film are in contact with respective roller surfaces of two of the first cooling rollers.
4. 4. The PVB film sizing device of claim 3, wherein the roll surface of the first cooling roll is a frosted surface.
5. 5. The PVB film sizing device of claim 3, wherein the temperature difference across the first cooling roller is from 0 ℃ to 2 ℃.
6. 6. The PVB film sizing device of claim 1, wherein the heating assembly comprises at least two heated rollers, wherein opposite sides of the PVB film are in contact with respective ones of the heated rollers, and/or wherein the second cooling assembly comprises at least two second cooling rollers, wherein opposite sides of the PVB film are in contact with respective ones of the second cooling rollers.
7. 7. The PVB film sizing apparatus of claim 6 wherein the second cooling assembly comprises at least two second cooling rollers, the PVB film wound around the second cooling rollers, the second cooling rollers having mirrored surfaces.
8. 8. The film sizing apparatus of any of claims 1-7, wherein a distance between a surface of the first cooling assembly for contacting the PVB film and the discharge is 0 to 10mm.
9. 9. A PVB film sizing method using the PVB film sizing apparatus of any one of claims 1 to 8, the PVB film sizing method comprising: Winding the PVB film on the first cooling assembly, the heating assembly and the second cooling assembly in sequence; and sequentially cooling and shaping the PVB film by using the first cooling assembly, the heating assembly and the second cooling assembly.
10. 10. The method of claim 9, wherein said sequentially cooling the PVB film using the first cooling assembly, the heating assembly, and the second cooling assembly comprises: Cooling and shaping the PVB film by using the first cooling assembly, wherein the contact time of the first cooling assembly and the PVB film is 9s to 11s; Cooling and shaping the PVB film by using the heating component, wherein the time for the heating component to contact the PVB film is 11s to 13s; And cooling and shaping the PVB film by using the second cooling assembly, wherein the contact time of the second cooling assembly and the PVB film is 9s to 11s.

Description

PVB film shaping device and PVB film shaping method Technical Field The application relates to the technical field of PVB film production, in particular to a PVB film shaping device and a PVB film shaping method. Background In the process of producing PVB (Polyvinyl butyral ) film, after the PVB film is demolding, the PVB film needs to be cooled and shaped by using a PVB film shaping device, and the most commonly used method at present is mainly a water-in process, i.e. the PVB film coming out from the die lip of the die is put into water for cooling treatment. The energy consumption (electricity, water) consumption of traditional PVB film setting device is great, and is higher to water tank quality, water route circulative cooling requirement, needs often to drain the change, and is high to the device etc. control requirement that PVB film surface was dewatered, and PVB film moisture content is difficult for controlling. Disclosure of Invention The application provides a PVB film shaping device and a PVB film shaping method, which can reduce energy consumption while cooling and shaping a PVB film. In a first aspect, an embodiment of the present application provides a PVB film shaping apparatus, configured to cool and shape a PVB film extruded through a discharge hole of a die, where the PVB film shaping apparatus includes a first cooling assembly, a heating assembly, and a second cooling assembly, and the PVB film is sequentially wound around the first cooling assembly, the heating assembly, and the second cooling assembly, where a temperature of a surface of the first cooling assembly that is used to contact the PVB film is between 0 ℃ and-5 ℃, a temperature of a surface of the heating assembly that is used to contact the PVB film is between 30 ℃ and 40 ℃, and a temperature of a surface of the second cooling assembly that is used to contact the PVB film is between 15 ℃ and 20 ℃. In some of these embodiments, the temperature of the surface of the first cooling assembly that is in contact with the PVB film is-5 ℃, the temperature of the surface of the heating assembly that is in contact with the PVB film is 40 ℃, and the temperature of the surface of the second cooling assembly that is in contact with the PVB film is 15 ℃. In some of these embodiments, the first cooling assembly comprises at least two first cooling rollers, and the opposite sides of the PVB film are in contact with the roller surfaces of two of the first cooling rollers, respectively. In some embodiments, the first cooling roller has a frosted surface. In some of these embodiments, the temperature difference across the first chill roll is from 0 ℃ to 2 ℃. In some embodiments, the heating assembly comprises at least two heated rollers, opposite sides of the PVB film respectively contacting the roller surfaces of two of the heated rollers, and/or the second cooling assembly comprises at least two second cooling rollers, opposite sides of the PVB film respectively contacting the roller surfaces of two of the second cooling rollers. In some of these embodiments, the second cooling assembly comprises at least two second cooling rollers around which the PVB film is wound, the second cooling rollers having mirrored roll surfaces. In some of these embodiments, the distance between the surface of the first cooling assembly that is in contact with the PVB film and the discharge orifice is from 0 to 10mm. In a second aspect, an embodiment of the present application provides a PVB film shaping method, using the PVB film shaping device according to the first aspect, where the PVB film shaping method includes: Winding the PVB film on the first cooling assembly, the heating assembly and the second cooling assembly in sequence; and sequentially cooling and shaping the PVB film by using the first cooling assembly, the heating assembly and the second cooling assembly. In some embodiments, the cooling the PVB film using the first cooling assembly, the heating assembly, and the second cooling assembly in sequence comprises: Cooling and shaping the PVB film by using the first cooling assembly, wherein the contact time of the first cooling assembly and the PVB film is 9s to 11s; Cooling and shaping the PVB film by using the heating component, wherein the time for the heating component to contact the PVB film is 11s to 13s; And cooling and shaping the PVB film by using the second cooling assembly, wherein the contact time of the second cooling assembly and the PVB film is 9s to 11s. The PVB film shaping device has the beneficial effects that as the PVB film shaping device comprises the first cooling component, the heating component and the second cooling component, the PVB film is sequentially wound on the first cooling component, the heating component and the second cooling component, the temperature of the surface of the first cooling component, which is used for being in contact with the PVB film, is between 0 and minus 5 ℃, the temperature of the surface of t