Self-cleaning photovoltaic EVA (Ethylene Vinyl Acetate) packaging adhesive film forming device and process thereof

Abstract

The invention relates to the technical field of synthetic film production, in particular to a self-cleaning photovoltaic EVA packaging adhesive film forming device and a process thereof.The self-cleaning photovoltaic EVA packaging adhesive film forming device comprises a base, an extruder is mounted on one side of the base, and an output mechanism is arranged at the top end of the base and comprises a mounting frame welded to the top end of the base; the air cooler and the extruder are started synchronously, the induction rollers drive the structure to change under the action of viscosity of the adhesive film, the valve is opened to enable cold air to be sprayed out, cooling and cleaning of the adhesive film are achieved, stable operation of the device is guaranteed through dynamic balance of gas, and according to the viscosity difference of the adhesive film, the adhesive film is cooled and cleaned. Through transmission of structures such as the induction roller and the T-shaped plate, self-adaptive adjustment of the distance between the conveying rollers is achieved, wrinkling and deviation of the adhesive film are avoided, series transmission is driven through the induction roller, the cold air direction of a spray head is changed, heat dissipation is accelerated, meanwhile, drawing force counteracts the shrinkage internal stress of the adhesive film, the adhesive film forming quality is improved, and high-quality materials are provided for follow-up packaging.

Description

Technical Field

[0001] The present invention relates to the technical field of synthetic film production, in particular to a self-cleaning photovoltaic EVA encapsulation film molding device and a process thereof. Background Art

[0002] The EVA film forming equipment includes a cast film extruder, a cooling device, a winding device and a stress device. Plastic particles are added to the hopper of the extruder, stirred evenly by the stirring shaft in the hopper, and then heated and plasticized by the inner side of the extruder drum. At the same time, cooling water is introduced through the internal screw to control the temperature. The melted plastic particles are extruded into the mold through the main die head, and then the melted material is discharged to the cooling roller for cooling through the cast film machine. After cooling and trimming, it is wound up to complete the forming.

[0003] However, during the high-temperature extrusion process of the film, its surface is very susceptible to the adsorption of impurities such as dust and debris. The residue of these impurities will significantly reduce the transmittance and packaging performance of the film, thereby seriously affecting the power generation efficiency of photovoltaic modules.

[0004] In view of this, research and improvement are carried out to the existing problems, and a self-cleaning photovoltaic EVA encapsulation film molding device and process are provided, aiming to solve the problems and improve the practical value through this technology. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings existing in the prior art, and a self-cleaning photovoltaic EVA encapsulation film forming device and process are proposed. The present invention starts the cold air blower and the extruder synchronously. The induction roller is driven by the viscosity of the film to change its structure. The valve is opened to allow cold air to be sprayed out, thereby cooling and cleaning the film. The gas dynamic balance ensures stable operation of the device. According to the difference in film viscosity, the transmission is carried out through the induction roller, T-shaped plate and other structures to achieve adaptive adjustment of the spacing between the conveying rollers to avoid wrinkle deviation of the film. The induction roller drives the series transmission to change the direction of the cold air from the nozzle and accelerate heat dissipation. At the same time, the tensile force offsets the internal stress of the film shrinkage, thereby improving the film molding quality and providing high-quality materials for subsequent packaging.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions: a self-cleaning photovoltaic EVA encapsulation film molding device and process thereof, comprising a base, an extruder mounted on one side of the base, an output mechanism disposed at the top of the base, the output mechanism comprising a mounting frame welded to the top of the base, and two sets of symmetrical conveying rollers mounted inside the mounting frame; An induction mechanism is provided on one side of the mounting frame, and the induction mechanism includes a guide frame welded to one side of the mounting frame, an induction roller slides inside the guide frame, a T-shaped plate is installed on one end of the induction roller, a sleeve A is welded to the side wall of the mounting frame, a sleeve B is welded to the top of the base, push rods are fixedly connected through both sides of the T-shaped plate, the push rods pass through the sleeves A and sleeves B, and circular plates are installed at both ends of the sleeves A and B, one end of the sleeve A is connected to an exhaust pipe, and a pressure rod slides inside the exhaust pipe; A conveying roller spacing adjustment mechanism is provided between the output mechanism and the sensing mechanism; A cooling mechanism is provided on one side of the mounting frame, and the cooling mechanism includes an air cooler installed at the bottom end of the base, a diversion pipe is installed at the top end of the mounting frame, one side of the diversion pipe is connected to an air outlet pipe, an air supply pipe is connected between the air cooler and the air outlet pipe, a connecting pipe is connected between the air supply pipe and the sleeve A, one end of the air outlet pipe is connected to a nozzle, and an angle adjustment component is installed on the side wall of the air outlet pipe.

[0007] Preferably, the sleeve A and the sleeve B are symmetrically distributed about the central axis of the T-shaped plate, and the sleeve A and the sleeve B are both filled with an equal amount of gas.

[0008] Preferably: the adjustment mechanism includes a threaded rod rotated on the side wall of the mounting frame, a limiting groove is provided on the side wall of the mounting frame, a slider is threadedly connected to the surface of the threaded rod, a gear A is installed on the top of the threaded rod, a rack A is meshed and connected to one side of the gear A, a connecting rod A is fixedly connected between the T-shaped plate and the rack A, and a connecting frame is welded to the side wall of the slider.

[0009] Preferably, a motor is installed on one side of the conveying roller, and the motor is fixedly connected to the inside of the connecting frame.

[0010] Preferably, the threaded rod rotates inside the limiting groove, and the threaded rod adopts a bidirectional thread.

[0011] Preferably, a plurality of exhaust holes are provided on the side wall of the exhaust pipe, and a spring is provided inside the exhaust pipe.

[0012] Preferably: the angle adjustment assembly includes a support frame welded to one side of the mounting frame, a connecting shaft is rotatably installed inside the support frame, the connecting shaft is fixedly connected between multiple groups of air outlet ducts, one end of the connecting shaft is installed with a gear B, one side of the gear B is meshed with a rack B, and a connecting rod B is fixedly connected between the rack A and the gear B.

[0013] Preferably, a valve is installed on the outer wall of the air delivery pipe, and one end of the valve is in sliding contact with the bottom end of the pressure rod.

[0014] Preferably, a solenoid valve is installed at the connection between the connecting pipe and the sleeve A, and a one-way valve is installed at the connection between the exhaust pipe and the sleeve A.

[0015] A self-cleaning photovoltaic EVA encapsulation film molding process is based on the self-cleaning photovoltaic EVA encapsulation film molding device described above, and the process includes the following steps: S1: Start the extruder to extrude the film, and at the same time, the cooling air blower is turned on to generate cold air reserve, which drives the threaded rod to move through the movement of the T-shaped plate to adjust the spacing of the conveyor rollers; S2: utilizing the difference in the viscosity of the film, the induction roller drives the T-shaped plate to move, the connecting rod A drives the rack A to move, the distance between the conveying rollers is adaptively adjusted, and the valve is triggered to open, so that the cold air is sprayed onto the film through the nozzle (604); S3: The T-shaped plate drives gear B and rack B to move, and gear B drives the connecting shaft to rotate, changing the cold air spray angle of the nozzle to blow air to the film.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention extrudes the film through the extruder, the cooling air machine is started synchronously, and the cold air is transported through the air duct. It cannot enter the diversion pipe because the valve is closed. When the induction roller is affected by the viscosity of the film, it drives the T-shaped plate to move. The T-shaped plate synchronously drives the push rod to make the circular plate compress the gas in the sleeve A. The gas enters the exhaust pipe to increase the pressure, pushing the pressure rod to open the valve. After the valve is opened, the cold air is ejected from the nozzle through the air duct, the diversion pipe, and the air outlet pipe, which not only cools the surface of the film to prevent it from deformation and adhesion due to high temperature, but also blows away impurities such as dust and debris on the surface to ensure the quality of film molding; at the same time, the gas output by the air duct is used in the cooling and cleaning process. Part of the gas enters the sleeve A through the connecting pipe to supplement the gas that was compressed and discharged before, so that the amount of gas in the sleeve A maintains a dynamic balance, ensuring that the sensing mechanism can work normally when it is triggered next time, and ensuring the continuous and stable operation of the device.

[0017] 2. The present invention utilizes the difference in film viscosity to achieve adaptive adjustment of the distance between the conveyor rollers. After the film is extruded from the extruder and passes through the induction roller, the film with high viscosity exerts a stronger thrust on the induction roller, causing the induction roller to slide in the guide frame, driving the T-shaped plate to move. The T-shaped plate drives the rack A through the connecting rod A. Through the transmission of gear A and the threaded rod, the threaded rod with a bidirectional thread on the surface rotates, and the slider connected to it moves in the limit groove, driving the two sets of conveyor rollers connected to the slider to adjust the distance. When the viscosity of the film is high, the distance between the conveyor rollers is reduced to increase the pressure; when the viscosity is low, the distance is increased to prevent excessive extrusion, ensure that the film is subjected to appropriate force, avoid wrinkles and offsets, and improve conveying stability and film quality. In addition, the sleeves A and B are symmetrically distributed and filled with equal amounts of gas. When the induction roller moves, the internal gas pressure changes to assist the movement of the T-shaped plate, further optimizing the conveyor roller distance adjustment effect.

[0018] 3. The present invention uses an induction roller that is affected by the viscosity of the film to move, thereby driving the T-shaped plate to move, and then moving rack A. Because rack A is fixedly connected to connecting rod B, it will drive connecting rod B to move synchronously, thereby causing rack B to produce linear motion. Rack B meshes with gear B, and its linear motion is converted into the rotational motion of gear B, driving the connecting shaft to rotate, causing all air outlet pipes to rotate a certain angle around the axis of the connecting shaft. As a result, the cold air ejected from the nozzle is no longer vertically downward, but acts on the surface of the film at an inclined angle, blowing the hot air on the surface of the film forward, accelerating heat discharge, improving heat dissipation efficiency, and helping the film to form quickly. At the same time, the inclined wind force generates a tensile force along the conveying direction of the film, offsetting the internal stress generated by the cooling and shrinkage of the film, reducing the risk of wrinkles, and keeping the film flat after cooling, providing high-quality material for subsequent packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the top view of the structure of the present invention; Figure 3 It is a schematic structural diagram of the conveying mechanism of the present invention; Figure 4 This is a schematic structural diagram of the sensing and regulating mechanism of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of part A; Figure 6 It is a schematic structural diagram of the cooling mechanism of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram of part B in the middle; Figure 8 It is a schematic diagram of the overall structure of the support frame of the present invention.

[0020] Legend: 1. Base; 2. Extruder; 3. Output mechanism; 301. Mounting frame; 302. Conveyor roller; 303. Motor; 4. Induction mechanism; 401. Guide frame; 402. Induction roller; 403. T-plate; 404. Sleeve A; 405. Sleeve B; 406. Push rod; 407. Round plate; 408. Exhaust pipe; 409. Pressure rod; 410. Spring; 5. Adjustment mechanism; 501. Limiting groove; 502. Threaded rod; 503, slider; 504, gear A; 505, rack A; 506, connecting rod A; 507, connecting frame; 6, cooling mechanism; 601, air cooler; 602, diverter pipe; 603, air outlet pipe; 604, nozzle; 605, support frame; 606, connecting shaft; 607, gear B; 608, rack B; 609, connecting rod B; 610, air duct; 611, valve; 612, connecting pipe. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See Figures 1 to 8 As shown, the present invention provides a self-cleaning photovoltaic EVA encapsulation film molding device, comprising a base 1, an extruder 2 is mounted on one side of the base 1, an output mechanism 3 is provided at the top of the base 1, and the output mechanism 3 includes a mounting frame 301 welded to the top of the base 1, and two sets of symmetrical conveying rollers 302 are mounted inside the mounting frame 301; A sensing mechanism 4 is provided on one side of the mounting frame 301. The sensing mechanism 4 includes a guide frame 401 welded to one side of the mounting frame 301. A sensing roller 402 slides inside the guide frame 401. A T-shaped plate 403 is installed on one end of the sensing roller 402. A sleeve A404 is welded to the side wall of the mounting frame 301. A sleeve B405 is welded to the top of the base 1. Push rods 406 are fixedly connected to both sides of the T-shaped plate 403. The push rods 406 pass through the sleeves A404 and sleeves B405. Circular plates 407 are installed at both ends of the sleeves A404 and B405. An exhaust pipe 408 is connected to one end of the sleeve A404. A pressure rod 409 slides inside the exhaust pipe 408. A spacing adjustment mechanism 5 for adjusting the conveying rollers 302 is provided between the output mechanism 3 and the sensing mechanism 4; It should be noted that as the film extruded from the extruder 2 passes over the induction roller 402 during transport, due to the varying viscosity of different films, more viscous films exert a stronger thrust on the induction roller 402. Under the influence of the film's viscosity, the induction roller 402 slides within the guide frame 401, driving the T-shaped plate 403 at one end toward the sidewall of the conveyor roller 302. As the T-shaped plate 403 moves, it drives the rack A505 via the connecting rod A506. Because the rack A505 is meshed with the gear A504, the linear movement of the rack A505 is converted into the rotational movement of the gear A504. The gear A504 is installed at the top of the threaded rod 502, thereby driving the threaded rod 502 to rotate synchronously. Since the threaded rod 502 adopts a bidirectional thread, when it rotates, the slider 503 threaded on its surface moves in the limit groove 501. The slider 503 is connected to the motor 303 on one side of the conveying roller 302 through the connecting frame 507, thereby driving the two sets of conveying rollers 302 to move closer to each other, so as to realize the adaptive adjustment of the distance between the conveying rollers 302 according to the viscosity of the film. The distance between the conveying rollers 302 can be automatically adjusted according to the viscosity of the film. When the viscosity of the film is high, the distance between the conveying rollers 302 is reduced to increase the pressure on the film; when the viscosity of the film is low, the distance between the conveying rollers 302 is increased to avoid excessive squeezing of the film. The adaptive adjustment function ensures that the film is always in a suitable stress state during the conveying process, thereby effectively avoiding problems such as wrinkles or offsets in the film during the conveying process, allowing the film to pass through the conveying equipment smoothly and stably, providing high-quality film materials for subsequent molding and packaging processes, and improving the overall quality of the photovoltaic EVA packaging film.

[0023] In addition, the interiors of sleeves A404 and B405 are filled with equal amounts of gas and are symmetrically distributed about the central axis of the T-shaped plate 403. When the sensing roller 402 moves, the push rod 406 moves inside the sleeves A404 and B405. The change in gas pressure inside the sleeve B405 is superimposed on the thrust exerted on the sensing roller 402 by the viscosity of the film, making the movement of the T-shaped plate 403 smoother and enhancing the effect of adjusting the spacing between the conveying rollers 302.

[0024] A cooling mechanism 6 is provided on one side of the mounting frame 301, and the cooling mechanism 6 includes an air cooler 601 installed at the bottom end of the base 1. A diverter pipe 602 is installed at the top of the mounting frame 301, and one side of the diverter pipe 602 is connected to an air outlet pipe 603. An air supply pipe 610 is connected between the air cooler 601 and the air outlet pipe 603, and a connecting pipe 612 is connected between the air supply pipe 610 and the sleeve A404. One end of the air outlet pipe 603 is connected to a nozzle 604, and an angle adjustment component is installed on the side wall of the air outlet pipe 603.

[0025] It should be noted that when the extruder 2 starts to extrude the film, the cooling fan 601 is started synchronously. The cold air generated by the air cooler 601 is transported through the air duct 610. At this time, since the valve 611 is in a closed state, the cold air cannot directly enter the diversion pipe 602 temporarily. When the induction roller 402 is affected by the viscosity of the film, it drives the T-shaped plate 403 to move toward the side wall close to the conveying roller 302. The T-shaped plate 403 simultaneously drives the push rod 406 to move into the inside of the sleeve A404. The push rod 406 drives the circular plate 407 to move in the sleeve A404. Because the inside of the sleeve A404 is filled with a certain amount of gas, the movement of the circular plate 407 compresses the gas into the exhaust pipe 408, thereby increasing the pressure inside the exhaust pipe 408. The increased pressure pushes the pressure rod 409 to move downward. During the downward movement of the pressure rod 409, it contacts the valve 611 and opens it. After the valve 611 is opened, the gas generated by the air cooler 601 can be smoothly transported to the inside of the diversion pipe 602 through the air duct 610. The cold air entering the diversion pipe 602 passes through the outlet pipe 603 and is finally ejected through the nozzle 604. The ejected cold air directly acts on the surface of the film, takes away the heat of the film, and achieves physical cooling of the film, avoiding problems such as deformation and adhesion of the film due to excessive temperature. In addition, the ejected gas directly acts on the surface of the film, blowing away impurities such as dust and debris attached to the surface of the film, thereby achieving cleaning of the film and ensuring the quality of film molding.

[0026] Furthermore, while the air delivery pipe 610 is delivering gas for cooling and cleaning, a small amount of gas enters the interior of the sleeve A404 through the connecting pipe 612. This gas replenishes the gas previously expelled by the compression of the circular plate 407, maintaining a dynamic balance of gas volume within the sleeve A404 and ensuring that the sensing mechanism 4 can function normally the next time the sensing mechanism is triggered, thus ensuring the continued stable operation of the device.

[0027] See Figure 4 As shown, the sleeve A404 and the sleeve B405 are symmetrically distributed about the central axis of the T-shaped plate 403, and the sleeve A404 and the sleeve B405 are filled with an equal amount of gas.

[0028] See Figures 3 and 4 As shown, the adjustment mechanism 5 includes a threaded rod 502 that rotates on the side wall of the mounting frame 301, a limiting groove 501 is provided on the side wall of the mounting frame 301, a slider 503 is threadedly connected to the surface of the threaded rod 502, a gear A504 is installed on the top of the threaded rod 502, a rack A505 is meshed and connected to one side of the gear A504, a connecting rod A506 is fixedly connected between the T-shaped plate 403 and the rack A505, and a connecting frame 507 is welded to the side wall of the slider 503.

[0029] See Figure 3 As shown, a motor 303 is installed on one side of the conveying roller 302 , and the motor 303 is fixedly connected to the inside of the connecting frame 507 .

[0030] See Figures 3 and 4 As shown, the threaded rod 502 rotates inside the limiting groove 501, and the threaded rod 502 adopts a bidirectional thread.

[0031] See Figure 5 As shown, a plurality of exhaust holes are provided on the side wall of the exhaust pipe 408 , and a spring 410 is provided inside the exhaust pipe 408 .

[0032] See Figures 6 to 8 As shown, the angle adjustment assembly includes a support frame 605 welded to one side of the mounting frame 301, and a connecting shaft 606 is rotatably installed inside the support frame 605. The connecting shaft 606 is fixedly connected between multiple groups of air outlet ducts 603, and a gear B607 is installed at one end of the connecting shaft 606. A rack B608 is meshed with one side of the gear B607, and a connecting rod B609 is fixedly connected between the rack A505 and the gear B607.

[0033] It should be noted that when the induction roller 402 moves due to the viscosity of the film, it drives the T-shaped plate 403 to move, and then moves the rack A505. The rack A505 is fixedly connected to the connecting rod B609, so when the rack A505 moves, it will directly drive the connecting rod B609 to move synchronously. The movement of the connecting rod B609 drives the rack B608 connected to it to produce linear motion. Since the rack B608 is engaged with the gear B607, the linear motion of the rack B608 is converted into the rotational motion of the gear B607. Therefore, when the gear B607 rotates, it will drive the connecting shaft 606 to rotate together. When the connecting shaft 606 rotates, it will drive all the air outlet pipes 603 to rotate a certain angle around the axis of the connecting shaft 606. , thereby changing the direction of the cold air ejected by the nozzle 604, so that the cold air no longer blows vertically downward on the film, but acts on the surface of the film at an inclined angle, which can blow the hot air on the surface of the film forward and prevent the hot air from gathering around the film, effectively accelerating the heat discharge process, improving the heat dissipation efficiency of the film, and ensuring that the film is quickly formed at an appropriate temperature. At the same time, when the inclined wind force acts on the film, it will generate a tensile force along the conveying direction of the film. During the cooling process of the film, the tensile force can effectively offset the internal stress caused by the shrinkage of the film, reduce the risk of wrinkles caused by uneven shrinkage of the film, and keep the film flat after cooling, providing high-quality film material for subsequent packaging processes.

[0034] See Figure 7 As shown, a valve 611 is installed on the outer wall of the air delivery pipe 610 , and one end of the valve 611 is in sliding contact with the bottom end of the pressure rod 409 .

[0035] See Figures 5 to 7 As shown, a solenoid valve is installed at the connection between the connecting pipe 612 and the sleeve A404, and a one-way valve is installed at the connection between the exhaust pipe 408 and the sleeve A404.

[0036] A self-cleaning photovoltaic EVA encapsulation film molding process is based on a self-cleaning photovoltaic EVA encapsulation film molding device, and the process includes the following steps: S1: Start the extruder 2 to extrude the film. At the same time, the cooling air blower 601 is turned on to generate a cold air reserve. The T-shaped plate 403 moves to drive the threaded rod 502 to move, thereby adjusting the spacing between the conveying rollers 302. S2: Utilizing the difference in film viscosity, the sensing roller 402 drives the T-shaped plate 403 to move, and the connecting rod A506 drives the rack A505 to move, adaptively adjusting the distance between the conveyor rollers 302 and triggering the valve 611 to open, allowing cold air to be sprayed onto the film through the nozzle 604; S3: The T-shaped plate 403 drives the gear B607 and the rack B608 to move, and the gear B607 drives the connecting shaft 606 to rotate, thereby changing the cold air spraying angle of the nozzle 604 to blow air to the film.

[0037] Working principle: When in use, the film extruded from the extruder 2 passes through the induction roller 402 during the conveying process. Due to the difference in viscosity of different films, the film with greater viscosity will produce a stronger thrust on the induction roller 402. Under the action of the viscosity of the film, the induction roller 402 slides in the guide frame 401, driving the T-shaped plate 403 at one end of it to move toward the side wall close to the conveying roller 302. When the T-shaped plate 403 moves, the rack A505 is driven to move through the connecting rod A506. Because the rack A505 is meshed with the gear A504, the linear movement of the rack A505 is converted into the rotational motion of the gear A504. The gear A504 is installed at the top of the threaded rod 502, thereby driving the threaded rod 502 to rotate synchronously. Since the threaded rod 502 adopts a bidirectional thread, when it rotates, the slider 503 threaded on its surface moves in the limit groove 501. The slider 503 is connected to the motor 303 on one side of the conveying roller 302 through the connecting frame 507, thereby driving the two sets of conveying rollers 302 to move closer to each other, realizing adaptive adjustment according to the viscosity of the film. The distance between the conveying rollers 302 is adjusted, so that the distance between the conveying rollers 302 can be automatically adjusted according to the viscosity of the film. When the viscosity of the film is high, the distance between the conveying rollers 302 is reduced to increase the pressure on the film; when the viscosity of the film is low, the distance between the conveying rollers 302 is increased to avoid excessive squeezing of the film. The adaptive adjustment function ensures that the film is always in an appropriate stress state during the conveying process, thereby effectively avoiding problems such as wrinkles or deviations of the film during the conveying process, allowing the film to pass through the conveying equipment smoothly and stably, providing high-quality film materials for subsequent molding and packaging processes, and improving the overall quality of photovoltaic EVA packaging film; In addition, the interiors of sleeves A404 and B405 are filled with equal amounts of gas, and are symmetrically distributed about the central axis of the T-shaped plate 403. When the sensing roller 402 moves, the push rod 406 moves within the sleeves A404 and B405. The change in gas pressure within the sleeve B405 is superimposed on the thrust exerted by the adhesive film on the sensing roller 402, making the movement of the T-shaped plate 403 smoother and enhancing the effect of adjusting the spacing between the conveying rollers 302. As extruder 2 begins to extrude the film, air cooler 601 is simultaneously started. The cold air generated by air cooler 601 is transported through air duct 610. At this time, since valve 611 is in the closed state, the cold air cannot directly enter diversion pipe 602. When the induction roller 402 is affected by the viscosity of the film, it drives T-shaped plate 403 to move toward the side wall close to the conveying roller 302. T-shaped plate 403 simultaneously drives push rod 406 to move into sleeve A404. Push rod 406 drives circular plate 407 to move inside sleeve A404. Because sleeve A404 is filled with a certain amount of gas, the movement of circular plate 407 compresses the gas into exhaust pipe 408, increasing the pressure inside exhaust pipe 408. The increased pressure pushes pressure rod 409 downward. During the downward movement, pressure rod 409 contacts valve 611 and opens it. After the valve 611 is opened, the gas generated by the air cooler 601 can be smoothly transported to the inside of the diversion pipe 602 through the air supply pipe 610. The cold air entering the diversion pipe 602 passes through the air outlet pipe 603 and is finally ejected through the nozzle 604. The ejected cold air directly acts on the surface of the film, taking away the heat of the film, achieving physical cooling of the film, avoiding deformation, adhesion and other problems of the film caused by excessive temperature, and the ejected gas directly acts on the surface of the film, blowing away impurities such as dust and debris attached to the surface of the film, achieving cleaning of the film and ensuring the quality of film molding.

[0038] In addition, during the process of air delivery pipe 610 outputting gas for cooling and cleaning, a small amount of gas enters the interior of sleeve A404 through connecting pipe 612. This part of gas replenishes the gas previously discharged due to the compression of circular plate 407, so that the amount of gas in sleeve A404 maintains a dynamic balance, ensuring that the sensing mechanism 4 can work normally when the sensing is triggered next time, providing guarantee for the continuous and stable operation of the device. When the induction roller 402 is moved by the adhesive force of the film, it drives the T-shaped plate 403 to move, and then drives the rack A505 to move. The rack A505 is fixedly connected to the connecting rod B609, so when the rack A505 moves, it will directly drive the connecting rod B609 to move synchronously. The movement of the connecting rod B609 drives the rack B608 connected to it to produce linear motion. Since the rack B608 is engaged with the gear B607, the linear motion of the rack B608 is converted into the rotational motion of the gear B607. Therefore, when the gear B607 rotates, it will drive the connecting shaft 606 to rotate together. When the connecting shaft 606 rotates, it will drive all the air outlet pipes 603 to rotate a certain angle around the axis of the connecting shaft 606, thereby The direction of the cold air ejected from the nozzle 604 is changed so that the cold air no longer blows vertically downward on the film, but acts on the surface of the film at an inclined angle, which can blow the hot air on the surface of the film forward and prevent the hot air from gathering around the film, effectively accelerating the heat discharge process, improving the heat dissipation efficiency of the film, and ensuring that the film is quickly formed at an appropriate temperature. At the same time, when the inclined wind force acts on the film, it will generate a tensile force on the film along its conveying direction. During the cooling process of the film, the tensile force can effectively offset the internal stress caused by the shrinkage of the film, reduce the risk of wrinkles caused by uneven shrinkage of the film, and keep the film flat after cooling, providing high-quality film material for subsequent packaging processes.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-cleaning photovoltaic EVA encapsulation film forming device, comprising a base (1), an extruder (2) being installed on one side of the base (1), characterized in that: An output mechanism (3) is provided at the top of the base (1), and the output mechanism (3) comprises a mounting frame (301) welded to the top of the base (1), and two sets of symmetrical conveying rollers (302) are installed inside the mounting frame (301); A sensing mechanism (4) is provided on one side of the mounting frame (301), and the sensing mechanism (4) includes a guide frame (401) welded to one side of the mounting frame (301), a sensing roller (402) sliding inside the guide frame (401), a T-shaped plate (403) mounted on one end of the sensing roller (402), a sleeve A (404) welded to the side wall of the mounting frame (301), a sleeve B (405) welded to the top of the base (1), push rods (406) passing through and fixedly connected to both sides of the T-shaped plate (403), the push rods (406) passing through the sleeves A (404) and sleeves B (405), and circular plates (407) mounted on both ends of the sleeves A (404) and B (405), one end of the sleeve A (404) is connected to an exhaust pipe (408), and a pressure rod (409) sliding inside the exhaust pipe (408); A spacing adjustment mechanism (5) for adjusting the conveying rollers (302) is provided between the output mechanism (3) and the sensing mechanism (4); A cooling mechanism (6) is provided on one side of the mounting frame (301), and the cooling mechanism (6) includes an air cooler (601) mounted at the bottom end of the base (1); a diverter pipe (602) is mounted on the top end of the mounting frame (301); one side of the diverter pipe (602) is connected to an air outlet pipe (603); an air supply pipe (610) is connected between the air cooler (601) and the air outlet pipe (603); a connecting pipe (612) is connected between the air supply pipe (610) and the sleeve A (404); one end of the air outlet pipe (603) is connected to a nozzle (604); and an angle adjustment component is mounted on the side wall of the air outlet pipe (603).

2. A self-cleaning photovoltaic EVA encapsulation film forming device according to claim 1, characterized in that: The sleeve A (404) and the sleeve B (405) are symmetrically distributed about the central axis of the T-shaped plate (403), and the sleeve A (404) and the sleeve B (405) are both filled with an equal amount of gas.

3. A self-cleaning photovoltaic EVA encapsulation film forming device according to claim 1, characterized in that: The adjustment mechanism (5) comprises a threaded rod (502) that rotates on the side wall of the mounting frame (301), a limiting groove (501) is provided on the side wall of the mounting frame (301), a slider (503) is threadedly connected to the surface of the threaded rod (502), a gear A (504) is installed on the top end of the threaded rod (502), a rack A (505) is meshedly connected to one side of the gear A (504), a connecting rod A (506) is fixedly connected between the T-shaped plate (403) and the rack A (505), and a connecting frame (507) is welded to the side wall of the slider (503).

4. A self-cleaning photovoltaic EVA encapsulation film forming device according to claim 3, characterized in that: A motor (303) is installed on one side of the conveying roller (302), and the motor (303) is fixedly connected to the inside of the connecting frame (507).

5. A self-cleaning photovoltaic EVA encapsulation film forming device according to claim 3, characterized in that: The threaded rod (502) rotates inside the limiting groove (501), and the threaded rod (502) adopts a bidirectional thread.

6. A self-cleaning photovoltaic EVA encapsulation film forming device according to claim 1, characterized in that: The side wall of the exhaust pipe (408) is provided with multiple groups of exhaust holes, and a spring (410) is provided inside the exhaust pipe (408).

7. The self-cleaning photovoltaic EVA encapsulation film forming device according to claim 1, characterized in that: The angle adjustment assembly comprises a support frame (605) welded to one side of the mounting frame (301); a connecting shaft (606) is rotatably mounted inside the support frame (605); the connecting shaft (606) is fixedly connected between the plurality of air outlet pipes (603); a gear B (607) is mounted on one end of the connecting shaft (606); a rack B (608) is meshedly connected to one side of the gear B (607); and a connecting rod B (609) is fixedly connected between the rack A (505) and the gear B (607).

8. The self-cleaning photovoltaic EVA encapsulation film forming device according to claim 1, characterized in that: A valve (611) is installed on the outer wall of the air delivery pipe (610), and one end of the valve (611) is in sliding contact with the bottom end of the pressure rod (409).

9. The self-cleaning photovoltaic EVA encapsulation film forming device according to claim 1, characterized in that: A solenoid valve is installed at the connection between the connecting pipe (612) and the sleeve A (404), and a one-way valve is installed at the connection between the exhaust pipe (408) and the sleeve A (404).

10. A self-cleaning photovoltaic EVA encapsulation film forming process, based on a self-cleaning photovoltaic EVA encapsulation film forming device according to any one of claims 1 to 9, characterized in that: The process includes the following steps: S1: Start the extruder (2) to extrude the film, and at the same time, start the cooling air blower (601) to generate a cold air reserve, which drives the threaded rod (502) to move through the T-shaped plate (403) to adjust the spacing of the conveying rollers (302); S2: Utilizing the difference in the viscosity of the film, the sensing roller (402) drives the T-shaped plate (403) to move, the connecting rod A (506) drives the rack A (505) to move, and the distance between the conveying rollers (302) is adaptively adjusted. At the same time, the valve (611) is triggered to open, so that the cold air is sprayed onto the film through the nozzle (604); S3: The T-shaped plate (403) drives the gear B (607) and the rack B (608) to move, and the gear B (607) drives the connecting shaft (606) to rotate, thereby changing the cold air spray angle of the nozzle (604) and blowing air to the film.

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