A polyimide film-forming anti-turbulence device

Abstract

This utility model relates to the field of anti-turbulence technology for polyimide film formation, specifically to a polyimide film formation anti-turbulence device, including an anti-turbulence hood, a duct housing, and an exhaust fan. The beneficial effects of this utility model are: the anti-turbulence hood and the duct housing are arranged vertically, forming an air duct between them. This effectively guides the volatile solvent inside the anti-turbulence hood through solvent evaporation holes into the air duct, where it is then discharged by the exhaust fan to the outside of the polyimide film formation anti-turbulence device along with the air inside the duct. This allows for rapid solvent evaporation while preventing external air turbulence, resulting in a polyimide film with uniform thickness. This polyimide film formation anti-turbulence device has a simple structure and is easy to manufacture and use.

Description

Technical Field

[0001] This utility model belongs to the field of polyimide film-forming anti-turbulence technology, specifically relating to a polyimide film-forming anti-turbulence device. Background Technology

[0002] Polyimide films are widely used in electronics, electrical engineering, and flexible displays due to their excellent thermal stability, dielectric properties, high mechanical strength, and electrical insulation. Research on novel polyimide films is attracting increasing attention from researchers. Currently, the main methods for forming polyimide films are casting (spinning), followed by heating to remove the solvent and pre-forming the film, and finally high-temperature post-treatment to completely remove the solvent or complete thermal imidization.

[0003] To meet practical application requirements, the prepared polyimide films are typically tens of micrometers or even thinner. Therefore, the uniformity of film thickness has a significant impact on film performance. Furthermore, because the solid content of the polyimide slurry used in casting (spinning) is relatively low, usually less than 20%, most of the solvent evaporates during the film formation process. Therefore, the control requirements for the film formation environment are even higher, and air turbulence-induced unevenness on the film surface should be avoided as much as possible. However, current laboratory casting machines lack effective anti-turbulence measures, thus requiring an effective anti-turbulence device for polyimide film formation. Utility Model Content

[0004] The purpose of this invention is to provide a polyimide film-forming anti-turbulence device that can prevent external air turbulence while the solvent evaporates rapidly, so that the obtained polyimide film has a uniform thickness.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0006] A polyimide film-forming anti-turbulence device includes an anti-turbulence shroud, a duct housing, and an exhaust fan; wherein the anti-turbulence shroud includes a hemispherical body and an annular flange arranged outward along the bottom edge of the body of the anti-turbulence shroud, and a plurality of solvent evaporation through holes are arranged circumferentially in the middle of the body of the anti-turbulence shroud, and polyimide is placed inside the anti-turbulence shroud.

[0007] The duct housing includes a main body and an annular flange that correspond to the shape of the anti-spoiler fairing. The duct housing is positioned above the anti-spoiler fairing, and an air duct is formed between the duct housing and the anti-spoiler fairing.

[0008] The exhaust fan is located at the top of the duct housing;

[0009] After the solvent in the polyimide evaporates, it enters the air duct through the solvent evaporation hole. The solvent and the air in the air duct leave the polyimide film-forming anti-turbulence device under the guidance of the exhaust fan.

[0010] As a further optimization of the above technical solution, the solvent evaporation vent is located outside the vertical projection coverage area of ​​the exhaust fan.

[0011] As a further optimization of the above technical solution, the anti-spoiler cover and the duct shell are made of heat-resistant material with a temperature resistance greater than or equal to 150°C. The heat-resistant material described in this application does not undergo phase change or deformation within 150°C, ensuring stable operation of the device during the polyimide film formation and drying process. This application does not limit the material selection for the anti-spoiler cover and the duct shell; those skilled in the art can select materials based on existing technology. For example, stainless steel, iron, aluminum, or other metallic materials, or epoxy resin, polyetheretherketone, and polyimide, can be selected, as long as their temperature resistance is greater than or equal to 150°C.

[0012] As a further optimization of the above technical solution, four equidistant connecting posts are provided between the annular flange of the anti-spoiler fairing and the annular flange of the duct shell, and the anti-spoiler fairing and the duct shell are connected by the connecting posts.

[0013] As a further optimization of the above technical solution, the anti-turbulence fairing and the duct shell are respectively bolted, plugged in or welded to the connecting column.

[0014] As a further optimization of the above technical solution, the connecting column is cylindrical.

[0015] As a further optimization of the above technical solution, the connecting column is also made of heat-resistant material with a temperature resistance greater than or equal to 150°C. Specifically, the selection of heat-resistant material can refer to the materials used in the anti-spoiler fairing and the duct shell, or other materials known to those skilled in the art with a temperature resistance greater than or equal to 150°C.

[0016] As a further optimization of the above technical solution, the exhaust fan speed can be adjusted.

[0017] As a further optimization of the above technical solution, the exhaust fan includes a power supply and a fan speed adjustment switch.

[0018] This utility model has at least the following beneficial effects:

[0019] 1. The anti-turbulence hood and the air duct shell are set up vertically, forming an air duct between them. This effectively guides the volatile solvent inside the anti-turbulence hood into the air duct through the solvent evaporation vent, and together with the air inside the air duct, it is discharged by the exhaust fan to the outside of the polyimide film forming anti-turbulence device. This allows the solvent to evaporate quickly while avoiding turbulence from the external air, resulting in a uniform thickness of the obtained polyimide film.

[0020] 2. This polyimide film-forming anti-turbulence device has a simple structure and is easy to manufacture and use.

[0021] 3. The solvent evaporation vent of the anti-turbulence shroud is located in the middle of the main body of the anti-turbulence shroud, which can effectively discharge the solvent while avoiding interference from external air on the polyimide film.

[0022] 4. The exhaust fan above the duct housing can quickly guide the evaporation and discharge of solvents. In some optimized technical solutions, the fan speed is adjustable. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of a polyimide film-forming anti-turbulence device provided in Example 1;

[0025] Figure 2 This is a schematic cross-sectional view of a polyimide film-forming anti-turbulence device provided in Example 1;

[0026] Figure 3 for Figure 2 The front view of the structure shown;

[0027] Figure 4 This is a top view of a polyimide film-forming anti-turbulence device provided in Example 1.

[0028] The reference numerals in the diagram are: 1-anti-turbulence cover, 2-air duct shell, 3-connecting column, 4-air duct, 5-exhaust fan, 6-power supply, 7-fan speed control switch, 8-solvent evaporation through hole, 9-socket. Detailed Implementation

[0029] The technical solution of this utility model will be further explained and described below through specific embodiments.

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0031] Unless otherwise expressly defined, in the claims, description and accompanying drawings of this utility model, the use of directional terms such as "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear" to indicate orientation or positional relationship is based on the orientation and positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0032] Example 1

[0033] like Figure 1-4 As shown in the figure, this embodiment discloses a polyimide film-forming anti-turbulence device, including an anti-turbulence cover 1, a duct housing 2, and an exhaust fan 5.

[0034] The anti-spoiler shroud 1 shown includes a hemispherical body and an annular flange arranged outward along the bottom edge of the body. Several solvent evaporation through holes 8 are arranged circumferentially in the middle of the body of the anti-spoiler shroud 1. Polyimide is placed inside the anti-spoiler shroud 1.

[0035] The duct housing 2 includes a hemispherical body corresponding to the anti-spoiler shroud 1 and an annular flange arranged outward along the bottom edge of the anti-spoiler shroud body. The duct housing 2 is disposed above the anti-spoiler shroud 1 and a duct 4 is formed between the duct housing 2 and the anti-spoiler shroud 1.

[0036] An exhaust fan 5 is located on the top of the duct housing 2. The exhaust fan 5 includes a power supply 6 and a speed control switch 7 located on the side of the exhaust fan 5 away from the anti-turbulence cover 1. The exhaust fan 5 is electrically driven and its speed can be adjusted. The evaporation rate of the solvent can be adjusted by adjusting the speed of the exhaust fan 5.

[0037] In this embodiment, the annular flange of the anti-spoiler shroud 1 and the annular flange of the duct housing 2 are respectively provided with four equally spaced insertion holes 9 at corresponding positions. The anti-spoiler shroud 1 and the duct housing 2 are respectively fastened to the connecting post 3 through the insertion holes 9 by insertion, thereby realizing the connection between the anti-spoiler shroud 1 and the duct housing 2. Furthermore, the connecting post 3 is cylindrical, and the resistance encountered by the gas flowing through the cylindrical connecting post 3 is small.

[0038] The solvent evaporation vent is located outside the vertical projection coverage area of ​​the exhaust fan 5. This arrangement can prevent the exhaust fan 5 from directly disturbing the air inside the anti-turbulence shroud 1 and affecting the film formation quality of polyimide.

[0039] In this embodiment, the anti-turbulence cover 1, the air duct shell 2, and the connecting column 3 are all made of iron.

[0040] The method of using this utility model is as follows: Place the entire polyimide film-forming anti-turbulence device directly above the polyimide to be dried after casting (scraping), and turn on the exhaust fan 5 by rotating the wind speed adjustment switch 7. The external heating device heats the polyimide to be dried. After the solvent evaporates due to heat, it enters the air duct 4 through the solvent evaporation hole 8, and then flows along the air duct 4 with the outside air under the drive of the exhaust fan 5 and is discharged from the polyimide film-forming anti-turbulence device through the exhaust fan 5.

[0041] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A polyimide film forming anti-turbulence device, characterized by, This includes a spoiler, duct housing, and exhaust fan; The anti-turbulence shield includes a hemispherical body and an annular flange arranged outward along the bottom edge of the body. The body of the anti-turbulence shield has a plurality of solvent evaporation holes arranged circumferentially in the middle. The polyimide is placed inside the anti-turbulence shield. The duct housing includes a main body and an annular flange corresponding to the shape of the anti-disturbance shield. The duct housing is disposed above the anti-disturbance shield, and an air duct is formed between the duct housing and the anti-disturbance shield. The exhaust fan is located at the top of the duct housing; After the solvent in the polyimide evaporates, it enters the air duct through the solvent evaporation through-hole. The solvent and the air in the air duct leave the polyimide film-forming anti-turbulence device under the guidance of the exhaust fan.

2. The polyimide film forming anti-hooping device according to claim 1, wherein The solvent evaporation vent is located outside the vertical projection coverage area of ​​the exhaust fan.

3. The polyimide film-forming anti-turbulence device as described in claim 1 or 2, characterized in that, The anti-turbulence shroud and the air duct shell are made of heat-resistant material, and the heat-resistant material has a temperature resistance greater than or equal to 150°C.

4. The polyimide film-forming anti-turbulence device as described in claim 1 or 2, characterized in that, Four equidistant connecting posts are provided between the annular flange of the anti-turbulence shield and the annular flange of the duct shell, and the anti-turbulence shield and the duct shell are connected through the connecting posts.

5. The polyimide film-forming anti-turbulence device as described in claim 4, characterized in that, The anti-turbulence shroud and the air duct shell are respectively bolted, plugged in, or welded to the connecting column.

6. The polyimide film-forming anti-turbulence device as described in claim 5, characterized in that, The connecting column is cylindrical.

7. The polyimide film-forming anti-turbulence device as described in claim 5, characterized in that, The connecting column is made of heat-resistant material, which has a temperature resistance greater than or equal to 150°C.

8. The polyimide film-forming anti-turbulence device as described in claim 1 or 2, characterized in that, The fan speed is adjustable.

9. The polyimide film-forming anti-turbulence device as described in claim 8, characterized in that, The exhaust fan includes a power supply and a fan speed control switch.

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