A film rapid drying device for film production

Abstract

The application relates to a thin film drying device for thin film production, in particular to a thin film rapid drying device for thin film production, which comprises a shell, an air extraction hole is fixedly installed on the shell, a negative pressure mechanism is fixedly installed in the shell, the negative pressure mechanism comprises Venturi tubes, the Venturi tubes are two, the Venturi tubes are fixedly installed in the shell, the inside of the shell is respectively divided into a low-pressure cavity one, a high-pressure cavity and a low-pressure cavity two through the two Venturi tubes; a connecting mechanism is arranged on the two sides of the shell, and a sealing mechanism is installed on the shell through the connecting mechanism. The shell, the air extraction hole, the negative pressure mechanism, the connecting mechanism, the sealing mechanism and the negative pressure cavity are arranged, so that the thin film can pass through the low-high-low negative pressure area during drying, the boiling point of the solvent is reduced through the negative pressure, the thin film is more stable when advancing through the negative pressure gradient, the solvent is gently and efficiently removed, and the drying process of the thin film is more efficient and stable.

Description

Technical Field

[0001] This invention relates to the technical field of film drying apparatus for film production, specifically a rapid film drying apparatus for film production. Background Technology

[0002] In the production of metallized thin films, film drying involves removing solvents from the film using methods such as high temperature and hot air to prevent bubbles, cracks, or insufficient adhesion during subsequent coating or metallization processes. The significance of the drying step lies in providing a defect-free substrate for subsequent metallized thin film production, ensuring process stability.

[0003] Currently, common film drying devices mainly use hot air circulation in ovens or microwave drying technology. However, hot air circulation suffers from low drying efficiency and uneven temperature distribution, and the high-speed airflow can also scratch the film surface, thus affecting its drying stability. Therefore, we propose a rapid film drying device for film production. Summary of the Invention

[0004] The purpose of this invention is to provide a rapid film drying apparatus for film production, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A rapid film drying device for film production includes a housing, on which an air extraction hole is fixedly installed, and inside which a negative pressure mechanism is fixedly installed. The negative pressure mechanism includes two Venturi tubes, which are fixedly installed inside the housing. The housing is divided into a low-pressure chamber one, a high-pressure chamber and a low-pressure chamber two by the two Venturi tubes.

[0007] The housing is provided with connecting mechanisms on both sides, and a sealing mechanism is installed on the housing through the connecting mechanisms. The sealing mechanism is used to seal both sides of the housing.

[0008] Preferably, the venturi tube includes an expansion section located on the side near the high-pressure chamber inside the housing, the expansion section being connected to a throat, and the throat being connected to a contraction section.

[0009] Preferably, the venturi tube has a through groove at its bottom end, a plurality of conveying rollers are rotatably mounted at the bottom end of the through groove, a sealing roller is slidably mounted at the top end of the through groove, and a spring is connected between the sealing roller and the venturi tube.

[0010] Preferably, a plate changing frame is slidably installed through the housing, the plate changing frame is provided with a rack, the rack is meshed with a gear, and a perforated baffle is detachably installed inside the plate changing frame.

[0011] Preferably, the gear is rotatably connected to the housing, and both sides of the gear are meshed with the rack, with the perforated baffle located on one side of the contraction section.

[0012] Preferably, the connecting mechanism includes a mounting frame, which is fixedly mounted on both ends of the housing. A first sealing airbag is fixedly mounted on the mounting frame, and a second sealing airbag is fixedly mounted on both ends of the housing.

[0013] Preferably, the sealing mechanism includes a sealing frame, on which a sealing groove one and a sealing groove two are provided. The sealing groove one is adapted to a sealing airbag one, and the sealing groove two is adapted to a sealing airbag two. A sealing plate is slidably installed at the bottom end of the sealing frame, and a spring two is connected between the sealing plate and the sealing frame.

[0014] Preferably, the sealing plate comprises a sealing airbag and an arc-shaped groove, wherein the sealing airbag and the arc-shaped groove are distributed intersectingly.

[0015] Preferably, a negative pressure chamber is detachably installed between the housing and the sealing mechanism.

[0016] Preferably, a balance pipe is installed between the low-pressure chamber one and the high-pressure chamber, and between the high-pressure chamber and the low-pressure chamber two, and a differential pressure sensor and a control valve are installed inside the balance pipe.

[0017] By employing the above technical solution, the present invention provides a rapid film drying apparatus for film production, which has at least the following beneficial effects:

[0018] (1) By setting up a shell, an air extraction hole, a negative pressure mechanism, a connecting mechanism, and a sealing mechanism, the present invention enables the film to pass through a "low-high-low" negative pressure zone during drying. The negative pressure lowers the boiling point of the solvent and makes the film travel more stably through the negative pressure gradient, thereby achieving gentle and efficient solvent removal and making the film drying process more efficient and stable.

[0019] (2) This invention achieves precise adjustment of the difference in negative pressure gradient between adjacent components by setting up a porous baffle and a negative pressure chamber. The device can flexibly adjust the negative pressure gradient by replacing the porous baffle, while adding a negative pressure chamber further expands the adjustment range of the negative pressure gradient. In addition, the device allows for a certain degree of incomplete sealing while maintaining negative pressure, thereby improving the applicability and cost-effectiveness of the device. Attached Figure Description

[0020] The accompanying drawings, which are provided to further illustrate the invention, constitute a part of this application:

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0023] Figure 3 This is a partial internal structure diagram of the present invention;

[0024] Figure 4 This is an enlarged schematic diagram of region A of the present invention;

[0025] Figure 5 This is an enlarged schematic diagram of region B of the present invention;

[0026] Figure 6 This is a schematic diagram of the plate changing frame and the perforated baffle of the present invention;

[0027] Figure 7 This is a schematic diagram of the rear structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the connection mechanism of the present invention;

[0029] Figure 9 This is a schematic diagram of the sealing mechanism of the present invention;

[0030] Figure 10 This is a cross-sectional schematic diagram of the sealing mechanism of the present invention;

[0031] Figure 11 This is an enlarged schematic diagram of region C of the present invention;

[0032] Figure 12 This is a schematic diagram of the structure of the present invention after the negative pressure chamber is installed;

[0033] Figure 13 For the present invention Figure 9 A cross-sectional schematic diagram.

[0034] In the diagram: 1. Shell; 2. Air extraction port; 3. Negative pressure mechanism; 4. Connecting mechanism; 5. Sealing mechanism; 6. Negative pressure chamber;

[0035] 301. High-pressure chamber; 302. Low-pressure chamber one; 303. Low-pressure chamber two; 304. Venturi tube; 3041. Contraction section; 3042. Throat; 3043. Expansion section; 305. Through groove; 306. Conveyor roller; 307. Sealing roller; 308. Spring one; 309. Plate changing frame; 310. Rack; 311. Gear; 312. Perforated baffle; 313. Balance tube;

[0036] 401. Mounting bracket; 402. Sealing airbag one; 403. Sealing airbag two;

[0037] 501. Sealing frame; 502. Sealing groove one; 503. Sealing groove two; 504. Sealing plate; 5041. Sealing airbag three; 5042. Arc groove; 505. Spring two. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention 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, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1:

[0040] Please see Figures 1-13 A rapid film drying device for film production includes a housing 1. A heating mechanism, preferably a heating wire, is installed inside the housing 1 to provide heat to the interior of the housing 1, causing the solvent inside the film to evaporate. An extraction port 2 is fixedly installed at the center of the top of the housing 1, and a negative pressure pump is fixedly connected to the extraction port 2 for pressurizing the interior of the housing 1 and collecting and treating the chemical gases generated during film drying.

[0041] A negative pressure mechanism 3 is installed inside the housing 1, which creates a "low-high-low" negative pressure gradient within the housing 1. The negative pressure lowers the boiling point of the solvent in the film, thereby achieving rapid solvent evaporation. Furthermore, through the "low-high-low" negative pressure gradient, the shaking and displacement of the film during transport are reduced, while significantly reducing equipment complexity and cost while ensuring drying efficiency, achieving gentle and efficient solvent removal.

[0042] Connecting mechanisms 4 are provided on both sides of the housing 1. A sealing mechanism 5 is installed on the housing 1 through the connecting mechanisms 4. The connecting mechanisms 4 are used to seal the connection with the sealing mechanism 5 to prevent air leakage at the connection. The sealing mechanism 5 is used to seal both sides of the housing 1 to maintain a negative pressure state inside the housing 1.

[0043] Please see Figures 2-7 The housing 1 has three chambers inside, which are low-pressure chamber 1 302, high-pressure chamber 301 and low-pressure chamber 2 303 from one side to the other. A venturi tube 304 is fixedly installed between the low-pressure chamber 1 302 and the high-pressure chamber 301 and the low-pressure chamber 2 303. The venturi tube 304 includes a contraction section 3041, a throat 3042 and an expansion section 3043. The side closer to the high-pressure chamber 301 is the expansion section 3043 and the side farther away from the high-pressure chamber 301 is the contraction section 3041.

[0044] The high-pressure chamber 301 is fixedly connected to the suction port 2. When the negative pressure pump draws air through the suction port 2, the gas in the low-pressure chambers 302 and 303 flows through the venturi tube 304. At the throat 3042 of the venturi tube 304, the gas velocity increases due to the sudden decrease in cross-sectional area. According to Bernoulli's principle, when the fluid velocity increases, static pressure energy is converted into kinetic energy, resulting in a decrease in pressure at the throat 3042. Meanwhile, in other parts of the venturi tube 304, such as the contraction section 3041 and the expansion section 3043, the gas velocity is relatively slow and the pressure is relatively high. Therefore, a pressure difference is formed across the venturi tube 304, with higher pressure at the contraction section 3041 and lower pressure at the throat 3042 and expansion section 3043, resulting in a higher negative pressure. This achieves a "low-high-low" negative pressure gradient between the low-pressure chamber 302, the high-pressure chamber 301, and the low-pressure chamber 303.

[0045] A through groove 305 is provided between the low-pressure chamber 302 and the high-pressure chamber 301, and between the high-pressure chamber 301 and the low-pressure chamber 303, for the transport of the membrane. The through groove 305 is located at the bottom end of the venturi tube 304, and the diameter of the through groove 305 is smaller than the diameter of the throat 3042. Preferably, the diameter of the through groove 305 is 1 / 2 of the diameter of the throat 3042, so that the through groove 305 has a smaller impact on the negative pressure gradient.

[0046] Multiple conveying rollers 306 are rotatably mounted at the bottom of the through groove 305. The surface of the conveying rollers 306 is made of an elastic material, preferably rubber. Multiple sealing rollers 307 are slidably mounted at the top of the through groove 305. The two sides of the sealing rollers 307 are connected to the inner wall of the housing 1 by springs 308. Under the action of the springs 308, when the film is not passing through, the surfaces of the sealing rollers 307 and the conveying rollers 306 are in contact, which seals the through groove 305 and prevents the through groove 305 from affecting the generation of the negative pressure gradient. When film passes through, the conveying rollers 306 convey the film, and the sealing rollers 307 press and limit the film, preventing the film from shaking and shifting, and sealing the through groove 305 to prevent air leakage. At the same time, the sealing rollers 307 are inflatable, which can effectively prevent the sealing rollers 307 from damaging the film surface.

[0047] A plate changing frame 309 is slidably mounted through the housing 1. There are two plate changing frames 309, and each plate changing frame 309 has a rack 310. The rack 310 is meshed with a gear 311. The gear 311 is rotatably mounted inside the housing 1, and the gear 311 is synchronously meshed with the rack 310 on the two plate changing frames 309. A perforated baffle 312 is detachably mounted on the plate changing frame 309.

[0048] The plate exchanging frame 309 is of a C-shaped structure, and a porous baffle 312 is detachably installed inside the plate exchanging frame 309, preferably in a plug-in manner. When the porous baffle 312 is installed in the plate exchanging frame 309, by displacing the plate exchanging frame 309 downward, the downward movement of the plate exchanging frame 309 drives the porous baffle 312 to move downward. Meanwhile, the downward movement of the plate exchanging frame 309 also drives a rack 310 to move downward, the downward movement of the rack 310 drives a gear 311 to rotate, the rotation of the gear 311 drives another rack 310 to move upward, and the upward movement of the rack 310 drives another plate exchanging frame 309 to move upward, thereby realizing rapid replacement of the porous baffle 312.

[0049] The porous baffle 312 is installed on one side of the contraction section 3041. The porous baffle 312 functions to increase airflow resistance and uniform airflow during air intake, and plays a role in increasing the negative pressure gradient and reducing noise. The opening size of the porous baffle 312 gradually decreases from both ends to the middle, which can better balance the airflow flow and resistance. Meanwhile, by replacing porous baffles 312 with different opening sizes, the magnitude of the negative pressure gradient can be adjusted within a certain range.

[0050] Balance pipes 313 are connected between the first low-pressure chamber 302 and the high-pressure chamber 301, and between the high-pressure chamber 301 and the second low-pressure chamber 303 respectively. A control valve and a differential pressure sensor are arranged in the balance pipe 313. When the differential pressure between the first low-pressure chamber 302 and the high-pressure chamber 301, and between the high-pressure chamber 301 and the second low-pressure chamber 303 is too large, the control valve opens to connect the balance pipe 313, which can avoid potential safety hazards caused by excessive differential pressure.

[0051] Please refer to Figures 8-11 , the connecting mechanism 4 includes a mounting frame 401, the mounting frame 401 is fixedly installed at positions on both sides of the housing 1, a plurality of first sealing airbags 402 are fixedly installed at both upper and lower ends of the mounting frame 401, and the first sealing airbags 402 at the upper and lower ends of the mounting frame 401 are distributed in a staggered manner. A plurality of second sealing airbags 403 are fixedly installed at both ends of the housing 1.

[0052] The sealing mechanism 5 includes a sealing frame 501, a first sealing groove 502 and a second sealing groove 503 are opened on the sealing frame 501, the first sealing groove 502 is slidably connected with the mounting frame 401 and adapted to the first sealing airbag 402. The second sealing groove 503 is slidably connected with the housing 1 and adapted to the second sealing airbag 403. This enables the sealing frame 501 to be slidably installed on one side of the housing 1 through the connecting mechanism 4, and the connecting portion is sealed by the first sealing airbag 402 and the second sealing airbag 403, so as to avoid air leakage at the connecting portion.

[0053] A sealing plate 504 is mounted on the bottom end of the sealing frame 501 via a spring 505. The sealing plate 504 includes a sealing airbag 5041 and an arc groove 5042. There are multiple sealing airbags 5041 and arc grooves 5042, which are arranged in an alternating array to form an "S"-shaped structure, so that the sealing plate 504 can achieve a better sealing effect when it comes into contact with the membrane.

[0054] Example 2

[0055] The difference between this embodiment and embodiment one is that a negative pressure chamber 6 is installed between the housing 1 and the sealing mechanism 5. A negative pressure mechanism 3 is installed on one side of the negative pressure chamber 6. A sealing groove 1 502 and a sealing groove 2 503 are installed on the side of the negative pressure chamber 6 near the negative pressure mechanism 3. A connecting mechanism 4 is installed on the other side of the negative pressure chamber 6. The sealing mechanism 5 is installed in the negative pressure chamber 6 through the connecting mechanism 4.

[0056] By installing the negative pressure chamber 6, a "low-medium-high-medium-low" negative pressure gradient is formed between the negative pressure chamber 6, low pressure chamber 1 302, high pressure chamber 301, low pressure chamber 2 303, and negative pressure chamber 6. This results in a larger range of negative pressure gradients, allowing for a wider distribution of the negative pressure gradient even with increased drying length. Consequently, the film drying and conveying process becomes more stable, and solvent removal becomes more uniform and stable. This effectively avoids problems such as film vibration and damage caused by excessive pressure difference.

[0057] It is important to note that a rotary vane pump is preferred for negative pressure pumping, which reduces equipment costs. Furthermore, once the high-pressure chamber 301, low-pressure chamber one 302, and low-pressure chamber two 303 are under negative pressure, the negative pressure pump can continuously operate at low power, avoiding the high energy consumption caused by frequent start-ups and shutdowns. This effectively reduces energy consumption and saves costs. Simultaneously, because the negative pressure pump operates continuously at low power, it can not only recover evaporated solvent but also continuously pump air from the high-pressure chamber 301, low-pressure chamber one 302, and low-pressure chamber two 303. Therefore, the overall equipment can tolerate a certain degree of non-complete sealing, which reduces costs and improves cost-effectiveness while ensuring drying efficiency.

[0058] A rapid film drying device for film production, the working principle of which is as follows:

[0059] Depending on the drying requirements of the film, it is selected whether to install the negative pressure chamber 6. When installing the negative pressure chamber 6, the sealing groove 502 and sealing groove 503 on the negative pressure chamber 6 are respectively inserted into the mounting bracket 401 and the housing 1. After the insertion is aligned, the sealing airbag 402 and sealing airbag 403 are inflated to make the negative pressure chamber 6 and the housing 1 sealed.

[0060] The sealing frame 501 is inserted into the mounting frame 401 and the negative pressure chamber 6 through the sealing groove 1 502 and the sealing groove 2 503 respectively. After the insertion is aligned, the sealing airbag 1 402 and the sealing airbag 2 403 are inflated to make the sealing frame 501 and the negative pressure chamber 6 sealed.

[0061] When the negative pressure pump is started, it draws air out through the air extraction port 2. The air in the high-pressure chamber 301 is directly extracted, while the gas in the low-pressure chamber 1 302 and low-pressure chamber 2 303 enters the high-pressure chamber 301 and is extracted after passing through the porous baffle 312 and the venturi tube 304.

[0062] Gases in low-pressure chamber 1 (302) and low-pressure chamber 2 (303) flow through venturi tube 304 and porous baffle 312. Passing through porous baffle 312 increases airflow resistance during intake and promotes airflow uniformity, thus increasing the negative pressure gradient and reducing noise. At the throat (3042) of venturi tube 304, the gas velocity increases due to the sudden decrease in cross-sectional area. According to Bernoulli's principle, as fluid velocity increases, static pressure energy is converted into kinetic energy, leading to a decrease in pressure at throat (3042). Meanwhile, in other parts of venturi tube 304, such as the contraction section (3041) and expansion section (3043), the gas velocity is relatively slow and the pressure is relatively high. Therefore, a pressure difference is formed across venturi tube 304, with higher pressure at the contraction section (3041) and lower pressure at the throat (3042) and expansion section (3043), resulting in a higher negative pressure. This achieves a "low-high-low" negative pressure gradient among low-pressure chamber 1 (302), high-pressure chamber 301, and low-pressure chamber 2 (303). Similarly, the negative pressure in negative pressure chamber 6 is lower than that in low-pressure chamber 1 (302) and low-pressure chamber 2 (303), thus creating a "low-medium-high-medium-low" negative pressure gradient within negative pressure chamber 6, low-pressure chamber 1 (302), high-pressure chamber 301, low-pressure chamber 2 (303), and negative pressure chamber 6. Heating negative pressure chamber 6, low-pressure chamber 1 (302), high-pressure chamber 301, low-pressure chamber 2 (303), and negative pressure chamber 6 maintains a high-temperature negative pressure state within these chambers.

[0063] The membrane enters the negative pressure chamber 6 through the sealing plate 504 within the sealing frame 501, and is then transported through the negative pressure chamber 6, low-pressure chamber one 302, high-pressure chamber 301, low-pressure chamber two 303, and negative pressure chamber 6 respectively. Because the membrane experiences inconsistent negative pressures in different chambers, the boiling point of the solvent is gradually lowered, allowing for stepwise evaporation and drying of the solvent within the membrane, and gradual cooling of the membrane, achieving a gentler drying effect.

[0064] When it is necessary to adjust the gradient difference of negative pressure, the perforated baffle 312 is inserted into the plate changing frame 309. Then, by moving the plate changing frame 309 downwards, the perforated baffle 312 moves downwards. Simultaneously, the rack 310 moves downwards, causing the gear 311 to rotate. The rotation of the gear 311 causes another rack 310 to move upwards, which in turn causes another plate changing frame 309 to move upwards. This allows for the rapid replacement of the perforated baffle 312. Therefore, the negative pressure gradient in multiple chambers can be adjusted using perforated baffles 312 with different orifice diameters.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid film drying apparatus for film production, characterized in that: The device includes a housing (1), on which an air extraction port (2) is fixedly installed. A negative pressure mechanism (3) is fixedly installed inside the housing (1). The negative pressure mechanism (3) includes a venturi tube (304). There are two venturi tubes (304). The venturi tubes (304) are fixedly installed inside the housing (1). The housing (1) is divided into a low-pressure chamber one (302), a high-pressure chamber (301), and a low-pressure chamber two (303) by the two venturi tubes (304). The high-pressure chamber (301) is fixedly connected to the air extraction port (2). The housing (1) is provided with connecting mechanisms (4) on both sides, and the housing (1) is equipped with a sealing mechanism (5) through the connecting mechanisms (4). The sealing mechanism (5) is used to seal both sides of the housing (1). The Venturi tube (304) includes an expansion section (3043) located on the side near the high-pressure chamber (301) inside the housing (1), the expansion section (3043) being connected to a throat (3042), and the throat (3042) being connected to a contraction section (3041). The bottom end of the venturi tube (304) is provided with a through groove (305), and multiple conveying rollers (306) are rotatably installed at the bottom end of the through groove (305). A sealing roller (307) is slidably installed at the top end of the through groove (305), and a spring (308) is connected between the sealing roller (307) and the venturi tube (304).

2. The rapid film drying apparatus for film production according to claim 1, characterized in that: A plate changing frame (309) is slidably installed through the housing (1). A rack (310) is provided on the plate changing frame (309). A gear (311) is meshed with the rack (310). A perforated baffle (312) is detachably installed inside the plate changing frame (309).

3. The rapid film drying apparatus for film production according to claim 2, characterized in that: The gear (311) is rotatably connected to the housing (1), and both sides of the gear (311) are meshed with the rack (310). The porous baffle (312) is located on one side of the contraction section (3041).

4. The rapid film drying apparatus for film production according to claim 1, characterized in that: The connecting mechanism (4) includes a mounting bracket (401), which is fixedly mounted on both ends of the housing (1). A sealing airbag (402) is fixedly mounted on the mounting bracket (401), and a sealing airbag (403) is fixedly mounted on both ends of the housing (1).

5. The rapid film drying apparatus for film production according to claim 1, characterized in that: The sealing mechanism (5) includes a sealing frame (501), on which a sealing groove 1 (502) and a sealing groove 2 (503) are provided. The sealing groove 1 (502) is adapted to the sealing airbag 1 (402), and the sealing groove 2 (503) is adapted to the sealing airbag 2 (403). A sealing plate (504) is slidably installed at the bottom end of the sealing frame (501), and a spring 2 (505) is connected between the sealing plate (504) and the sealing frame (501).

6. A rapid film drying apparatus for film production according to claim 5, characterized in that: The sealing plate (504) comprises a sealing airbag (5041) and an arc groove (5042), with the sealing airbag (5041) and the arc groove (5042) being distributed intersectingly.

7. A rapid film drying apparatus for film production according to claim 1, characterized in that: A negative pressure chamber (6) is detachably installed between the housing (1) and the sealing mechanism (5).

8. A rapid film drying apparatus for film production according to claim 1, characterized in that: A balance pipe (313) is installed between the low-pressure chamber one (302) and the high-pressure chamber (301), and between the high-pressure chamber (301) and the low-pressure chamber two (303). A differential pressure sensor and a control valve are installed inside the balance pipe (313).

Images