Transmission device for EVA (Ethylene Vinyl Acetate) adhesive film processing

Abstract

The utility model discloses a transmission device for EVA (Ethylene Vinyl Acetate) adhesive film processing, which comprises two mounting plates and an extruder for feeding, a plurality of transmission rollers are sequentially arranged at the upper ends of the two mounting plates and positioned at the discharge end of the extruder, and a suspension discharge mechanism for preventing adhesive film adhesion is arranged at the upper ends of the two mounting plates. An air guide mechanism used for guiding air flow out is arranged between the two mounting plates, and a controller is further arranged on one sides of the two mounting plates; the conveying device is simple in structure and reasonable in design, achieves the effect that an output high-temperature adhesive film is cooled firstly and then is in contact with the transmission roller to be conveyed, avoids the situation that the adhesive film is adhered to the transmission roller at high temperature, guarantees the appearance and performance of an adhesive film finished product, enables the adhesive film to be subjected to heat exchange and conveying in a suspended state through airflow in the whole process, and improves the production efficiency. And the transmission device is not polluted, so that the finished product quality of the adhesive film is further ensured, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of adhesive film transmission equipment, specifically a transmission device for EVA adhesive film processing. Background Technology

[0002] In the production and processing of EVA film, the transmission device is a key piece of equipment to ensure efficient and stable transmission of the film. As an important encapsulation material for photovoltaic modules, the processing quality of EVA film directly affects the performance and lifespan of the modules. In processes such as film extrusion, cooling, and winding, the stability and reliability of the transmission device are crucial, affecting not only production efficiency but also the surface quality and dimensional accuracy of the film.

[0003] The shortcomings of existing technology:

[0004] Currently, the transfer of EVA film during processing mainly relies on conveyor rollers or conveyor belts. After being extruded from the extruder, the film is pulled by multiple sets of drive rollers or conveyor belts to complete processes such as cooling, shaping, and winding. However, existing transmission devices need to be in direct contact with the film during transmission. Freshly extruded film is at a high temperature and its surface is clearly molten, making it extremely prone to sticking to the conveyor rollers or conveyor belts. This adhesion not only damages the film surface, affecting product appearance and performance, but can also contaminate the transmission device, increasing downtime for cleaning and reducing production efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a transmission device for EVA film processing to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a transmission device for EVA film processing, comprising two mounting plates and an extruder for feeding, wherein a plurality of transmission rollers are sequentially arranged at the upper ends of the two mounting plates located at the discharge end of the extruder, a suspension discharge mechanism for preventing film adhesion is provided at the upper ends of the two mounting plates, an air guide mechanism for discharging airflow is provided between the two mounting plates, and a controller is also provided on one side of the two mounting plates;

[0007] The suspended discharge mechanism includes:

[0008] A fan is mounted on the inner wall of one side of two mounting plates. The output end of the fan is connected to a duct, and several solenoid valves are installed on the duct.

[0009] A flow equalization box is horizontally installed on the upper end of two mounting plates and its end is connected to the interface of a solenoid valve. The solenoid valve is used to control the ventilation volume of the flow equalization box. An arc-shaped air duct is connected to the upper air outlet slot of the flow equalization box, and the arc-shaped air duct is located between the drive rollers.

[0010] A distance sensor is mounted on a horizontal bar above two mounting plates.

[0011] Preferably, the air guiding mechanism includes:

[0012] A lead screw is horizontally mounted on a positioning plate below two mounting plates. A motor is also mounted on the positioning plate below the two mounting plates, and the output end of the motor is connected to one end of the lead screw.

[0013] A sliding table is connected to a lead screw via a nut threaded onto it. Telescopic rods are symmetrically arranged on the upper surface of the sliding table, and air guide covers are provided at the upper ends of the telescopic rods.

[0014] A lifting assembly is disposed within the main body of two mounting plates, and the transmission roller is connected to the two mounting plates via the lifting assembly.

[0015] Preferably, the lifting assembly includes:

[0016] The lifting groove is formed on the main body of two mounting plates. A lifting block is slidably connected in the lifting groove. The roller shaft of the transmission roller passes through the vertical groove on the inner wall of the two mounting plates and is connected to the lifting block.

[0017] A locking block is slidably connected in a groove at the upper end of the lifting block. A spring for pushing out the locking block is provided in the groove at the upper end of the lifting block. Two locking holes matching the locking block are opened on the outer wall of the two mounting plates on the outer side of the lifting groove.

[0018] Preferably, the highest point of the arc-shaped air duct is lower than the drive roller, and the air outlet path is tangent to the cross-section of the drive roller.

[0019] Preferably, the distance sensors are mounted above the drive rollers and the number of them is the same as the number of the arc-shaped air ducts.

[0020] Preferably, a limiting rod is provided below the two mounting plates, and the limiting rod is slidably connected to the through hole on the sliding table.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. This transmission device for EVA film processing, by setting up a suspension discharge mechanism, including a fan, air duct, solenoid valve, flow equalization box, arc-shaped air duct and distance sensor, achieves the effect of cooling the output high-temperature film before it comes into contact with the transmission roller for conveying, avoiding the film from sticking to the transmission roller at high temperature, ensuring the appearance and performance of the finished film, and the transmission device does not come into contact with the film during the cooling process. The film is kept in a suspended state for heat exchange and conveying throughout the process by airflow, which will not cause contamination to the transmission device, further ensuring the quality of the finished film and improving production efficiency;

[0023] 2. The transmission device for processing EVA film is equipped with an air guiding mechanism, which includes a lead screw, a motor, a sliding table, a telescopic rod, an air guide shroud, and a lifting assembly. The airflow that has completed heat exchange is directed downward through the air guide shroud without affecting the film at the rear end. This allows the film behind the air guide shroud to be placed more stably on the transmission device at the rear end and directed downward. The position of the air guide shroud can be determined according to the cooling requirements. The arc-shaped air duct at the rear end of the air guide shroud does not need to participate in the operation, reducing the power consumption of the fan.

[0024] 3. The transmission device for processing EVA film is equipped with a lifting component, which includes a lifting groove, a lifting block, a locking block, a spring, and two locking holes. This enables the transmission roller to lift, raising the transmission roller at the rear end of the air guide to receive the film that has lost its support and guide it to the subsequent transmission device for discharge. This prevents the film from falling directly after losing the support of the airflow and causing damage due to sliding friction with the upper end of the air guide. Attached Figure Description

[0025] Figure 1 This is a front view schematic diagram of the internal structure of this utility model;

[0026] Figure 2 This is a top view of the connection of the fan, duct, solenoid valve and flow distribution box of this utility model;

[0027] Figure 3 This is a side view of the internal structure of this utility model;

[0028] Figure 4 The lifting assembly of this utility model is in Figure 3 Enlarged schematic diagram of the internal structure at point A;

[0029] Figure 5 This is a schematic diagram illustrating the working principle of this utility model.

[0030] In the diagram: 1. Two mounting plates; 2. Extruder; 3. Drive roller; 4. Suspended discharge mechanism; 401. Fan; 402. Air duct; 403. Solenoid valve; 404. Flow distribution box; 405. Arc-shaped air duct; 406. Distance sensor; 5. Air guide mechanism; 501. Lead screw; 502. Motor; 503. Sliding table; 504. Telescopic rod; 505. Air guide cover; 506. Lifting assembly; 5061. Lifting groove; 5062. Lifting block; 5063. Locking block; 5064. Spring; 5065. Two locking holes; 6. Controller; 7. Limit rod. Detailed Implementation

[0031] 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 only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integrated connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified. Example

[0035] Please see Figure 1-5As shown, the present invention provides a transmission device for EVA film processing: a transmission device for EVA film processing includes two mounting plates 1 and an extruder 2 for feeding. Several transmission rollers 3 are sequentially installed on the upper ends of the two mounting plates 1 at the discharge end of the extruder 2. The rollers of the transmission rollers 3 rotate by a built-in drive mechanism for film transmission. A suspension discharge mechanism 4 to prevent film adhesion is installed on the upper ends of the two mounting plates 1. An air guide mechanism 5 for airflow is installed between the two mounting plates 1. A controller 6 is also installed on one side of the two mounting plates 1.

[0036] The suspended discharge mechanism 4 includes a blower 401, a flow equalization box 404, and a distance sensor 406. The blower 401 is mounted on the inner wall of one side of two mounting plates 1 via a bracket. The output end of the blower 401 is connected to a duct 402, and several solenoid valves 403 are installed on the duct 402. The flow equalization box 404 is horizontally installed on the upper end of the two mounting plates 1 and its end is connected to the interface of the solenoid valve 403. The flow equalization box 404 can control the uniformity of airflow at the air outlet. The airflow generated by the fan 401 is sent into the flow equalization box 404 through the air duct 402 and the solenoid valve 403. The solenoid valve 403 is used to control the ventilation volume of the flow equalization box 404. An arc-shaped air duct 405 is connected to the upper air outlet slot of the flow equalization box 404 to direct the airflow in the flow equalization box 404. The arc-shaped air duct 405 is located between the drive rollers 3. That is to say, there is a set of solenoid valves 403, flow equalization boxes 404 and arc-shaped air ducts 405 between every two drive rollers 3. Figure 1 As shown. Distance sensor 406 is set on the horizontal bar above the two mounting plates 1. The distance sensor 406 is installed above each transmission roller 3 and the number of distance sensors 406 is the same as the number of arc-shaped air ducts 405. The distance sensor 406, solenoid valve 403 and fan 401 are electrically connected to controller 6 through wires.

[0037] When the transmission device starts working, the fan 401 is started first. Under the control of the solenoid valve 403, the fan 401 sends air to the arc-shaped air duct 405 and generates a constant and uniform airflow on one side of the transmission roller 3, thus starting the transmission roller 3. Figure 5 As shown, extruder 2 then begins to discharge material. After leaving extruder 2, the film is suspended at a certain height above drive roller 3 by the airflow below and output backward. During the suspension process, the airflow exchanges heat with the lower end face of the film. After the film cools down, it falls back onto drive roller 3 through air guide mechanism 5, and drive roller 3 provides power to move the film. Distance sensor 406 monitors the height of the film at all times. When any distance sensor 406 detects that the film height is too low or too high, controller 6 receives the signal and immediately controls the solenoid valve 403 on the left side of the drive roller 3 below the distance sensor 406 to increase or decrease the ventilation volume to the flow equalization box 404, thereby precisely adjusting the height of the film by adjusting the wind speed.

[0038] The suspension discharge mechanism 4 achieves the effect of cooling the output high-temperature adhesive film before it comes into contact with the transmission roller 3 for conveying. This avoids the adhesive film sticking to the transmission roller 3 at high temperatures, ensuring the appearance and performance of the finished adhesive film. Furthermore, the transmission device does not come into contact with the adhesive film during the cooling process. The entire process uses airflow to keep the adhesive film in a suspended state for heat exchange and conveying, which does not contaminate the transmission device. This further ensures the quality of the finished adhesive film and improves production efficiency.

[0039] The air guiding mechanism 5 includes a lead screw 501, a sliding table 503, and a lifting assembly 506. The lead screw 501 is horizontally rotatably connected to a positioning plate below the two mounting plates 1. A motor 502 is also fixedly mounted on the positioning plate below the two mounting plates 1, and the output end of the motor 502 is connected to one end of the lead screw 501. The sliding table 503 is threadedly connected to the lead screw 501 by a nut. Telescopic rods 504 are symmetrically mounted on the upper surface of the sliding table 503, and an air guide cover 505 is mounted on the upper end of the telescopic rods 504. The lifting assembly 506 is installed in the main body of the two mounting plates 1, and the transmission roller 3 is connected to the two mounting plates 1 through the lifting assembly 506.

[0040] Before the transmission device starts working, the operator should first determine the required cooling stroke based on the temperature of the extruded film. Then, start the motor 502 to drive the sliding table 503 to move horizontally to the designated position. Next, start the telescopic rod 504, which pushes the air guide shroud 505 upward until the top of the air guide shroud 505 is close to the lower end of the suspended film. After the transmission device starts working, the airflow used for cooling and suspending the film moves to the air guide shroud 505 and is directed downward by the air guide shroud 505. Only the arc-shaped air duct 405 on the left side of the air guide shroud 505 is activated, while the arc-shaped air duct 405 on the right side is shut off by the solenoid valve 403.

[0041] The airflow that has completed heat exchange is directed downward through the air guide shroud 505 via the air guide mechanism 5, without affecting the adhesive film at the rear end. This allows the adhesive film at the rear of the air guide shroud 505 to be placed more stably on the transmission device at the rear end and then directed downward. The position of the air guide shroud 505 can be determined according to the cooling requirements. The arc-shaped air duct 405 at the rear end of the air guide shroud 505 can be left unused, reducing the power consumption of the fan 401.

[0042] The lifting assembly 506 includes a lifting groove 5061 and a locking block 5063. The lifting groove 5061 is formed on the main body of the two mounting plates 1. The lifting block 5062 is slidably connected within the lifting groove 5061. The lifting block 5062 can only move up and down within the lifting groove 5061 and cannot rotate. The roller shaft of the transmission roller 3 passes through the vertical groove on the inner wall of the two mounting plates 1 and is connected to the lifting block 5062. The locking block 5063 is slidably connected in the groove at the upper end of the lifting block 5062. A spring 5064 for pushing out the locking block 5063 is installed in the groove at the upper end of the lifting block 5062. Two locking holes 5065 matching the locking block 5063 are formed on the outer wall of the two mounting plates 1 on the outer side of the lifting groove 5061.

[0043] After the position of the air guide shroud 505 is adjusted, the height of the drive roller 3 on its right side needs to be adjusted simultaneously so that its uppermost end is at the same height as the lower end of the film in its suspended state. This provides support for the film, which loses its support after leaving the air guide shroud 505. When adjusting the height of the drive roller 3, first overcome the spring force of the spring 5064 and push the locking blocks 5063 on both sides into the lifting block 5062. Then pull the drive roller 3 upwards, and the lifting block 5062 slides within the lifting groove 5061. When the locking block 5063 moves to align with the upper locking hole 5065, it pops out under the spring force of the spring 5064. At this point, the height adjustment of the drive roller 3 is complete. The film falls back after passing the drive roller 3, as... Figure 5 As shown.

[0044] The lifting assembly 506 enables the transmission roller 3 to lift, raising the transmission roller 3 at the rear end of the air guide shroud 505 to receive the adhesive film that has lost its supporting force, and guiding it to the subsequent transmission device for discharge. This prevents the adhesive film from falling directly after losing the supporting force of the airflow and causing damage due to sliding friction with the upper end of the air guide shroud 505.

[0045] The highest point of the arc-shaped air duct 405 is lower than that of the drive roller 3 to avoid friction between the adhesive film and the upper end of the arc-shaped air duct 405. The air outlet path of the arc-shaped air duct 405 is tangent to the cross-section of the drive roller 3, which allows the exhaust airflow to be utilized to the maximum extent.

[0046] Limiting rods 7 are installed below the two mounting plates 1. The limiting rods 7 are slidably connected to the through holes on the sliding table 503. The limiting rods 7 can improve the stability of the sliding table 503 during horizontal movement.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A transmission device for EVA film processing, comprising two mounting plates (1) and an extruder (2) for feeding, the upper ends of the two mounting plates (1) are sequentially provided with a plurality of transmission rollers (3) at the discharge end of the extruder (2), characterized in that: The upper ends of the two mounting plates (1) are provided with a suspension discharging mechanism (4) for preventing the adhesive film from adhering, the two mounting plates (1) are provided with a wind guide mechanism (5) for guiding the airflow, and one side of the two mounting plates (1) is further provided with a controller (6); The suspension discharging mechanism (4) comprises: A fan (401) is arranged on the inner wall of one side of the two mounting plates (1), and the output end of the fan (401) is connected with an air pipe (402), and a plurality of electromagnetic valves (403) are arranged on the air pipe (402); A uniform flow air box (404) is horizontally arranged at the upper end of the two mounting plates (1) and is connected with the interface of the electromagnetic valve (403), the electromagnetic valve (403) is used for controlling the ventilation volume of the uniform flow air box (404), an arc-shaped air duct (405) is connected with the upper air outlet groove of the uniform flow air box (404), and the arc-shaped air duct (405) is located between the transmission rollers (3); A distance sensor (406) is arranged on the horizontal strip above the two mounting plates (1).

2. The transmission device for EVA adhesive film processing according to claim 1, characterized in that: The wind guide mechanism (5) comprises: A lead screw (501) is horizontally arranged on the positioning plate below the two mounting plates (1), and a motor (502) is further arranged on the positioning plate below the two mounting plates (1), and the output end of the motor (502) is connected with one end of the lead screw (501); A sliding table (503) is threadedly connected with the lead screw (501) through a nut, and a telescopic rod (504) is symmetrically arranged on the upper end surface of the sliding table (503), and a wind guide cover (505) is arranged on the upper end of the telescopic rod (504); A lifting assembly (506) is arranged in the main body of the two mounting plates (1), and the transmission roller (3) is connected with the two mounting plates (1) through the lifting assembly (506).

3. The transmission device for EVA adhesive film processing according to claim 2, characterized in that: The lifting assembly (506) comprises: A lifting groove (5061) is arranged on the main body of the two mounting plates (1), a lifting block (5062) is slidably connected in the lifting groove (5061), and the roller shaft of the transmission roller (3) passes through the vertical groove on the inner wall of the two mounting plates (1) and is connected with the lifting block (5062); A locking block (5063) is slidably connected in the groove on the upper end of the lifting block (5062), a spring (5064) for pushing out the locking block (5063) is arranged in the groove on the upper end of the lifting block (5062), and two locking holes (5065) matched with the locking block (5063) are arranged on the outer wall of the two mounting plates (1) and located outside the lifting groove (5061).

4. The transmission device for EVA adhesive film processing according to claim 1, characterized in that: The highest point of the arc-shaped air duct (405) is lower than the transmission roller (3), and the air outlet path is tangent to the roller body section of the transmission roller (3).

5. The transmission device for EVA adhesive film processing according to claim 1, characterized in that: The distance sensor (406) is installed above the transmission roller (3) and the number thereof is consistent with that of the arc-shaped air duct (405).

6. The transmission device for EVA adhesive film processing according to claim 1, characterized in that: The lower part of the two mounting plates (1) is provided with a limiting rod (7) which is in sliding connection with the through hole on the sliding table (503).

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