Device for producing polypropylene film for high-temperature-resistant capacitor

Abstract

The utility model discloses a device for producing a polypropylene film for a high-temperature-resistant capacitor, which belongs to the technical field of polypropylene film production and comprises a case, a feed port and a discharge port are respectively arranged at the front end and the rear end of the case, guide rollers are arranged at the feed port and the discharge port on the inner side of the case, and a cooling roller is arranged in the middle of the inner side of the case. A cooling roller is arranged in the machine box, a cooling water pipe is arranged in the cooling roller, a water tank type cooling-water machine is arranged outside the machine box, the cooling water pipe is connected with the water tank type cooling-water machine, pressing rollers are arranged on the front side and the rear side of the cooling roller, and a feeding channel for a film to penetrate through is formed between the two pressing rollers and the cooling roller. The two compression rollers are matched with the driving motor to synchronously drive the compression rollers and the guide roller, so that a stable film feeding channel is formed, a film is tightened and attached to the cooling roller, deviation or wrinkles of the film in the conveying process are reduced, and the production quality of products is improved.

Description

Technical Field

[0001] This utility model discloses an apparatus for producing polypropylene film for high-temperature resistant capacitors, belonging to the field of polypropylene film production technology. Background Technology

[0002] With the rapid development of modern industrial technology, polypropylene film, as an important plastic packaging material, is being used more and more widely in the fields of food, medicine, and electronics. Pressing the polymer into thin sheets can effectively and cheaply resist most liquids and chemicals. Polypropylene cast film can be combined with other types of materials, such as paper and aluminum foil, to form composite films with two or more layers.

[0003] Currently, in the production of polypropylene film for high-temperature capacitors, after the film is heated and stretched, it needs to be cooled and shaped. However, in traditional cooling and shaping devices, the film and cooling rollers cannot be tightly bonded during processing, causing the film to vibrate during movement. This results in wrinkles on the surface of the cooled and shaped film, reducing product quality.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] The purpose of this invention is to provide an apparatus for producing polypropylene film for high-temperature capacitors, which has the effect of stabilizing the cooling and shaping of the film, in order to solve the above-mentioned problems.

[0006] This utility model achieves the above-mentioned objectives through the following technical solution: It includes a chassis, with an inlet and an outlet at the front and rear ends of the chassis, respectively. Guide rollers are provided at both the inlet and outlet on the inner side of the chassis. A cooling roller is located in the middle of the inner side of the chassis, with a cooling water pipe inside the cooling roller. A water tank chiller is located on the outer side of the chassis, and the cooling water pipe is connected to the water tank chiller. Pressure rollers are provided on both the front and rear sides of the cooling roller, forming a feeding channel between the two pressure rollers and the cooling roller for the film to pass through. The chassis is equipped with a drive motor for rotating the pressure rollers and guide rollers.

[0007] By adopting the above technical solution, the stretched film enters the machine from the feed port on the front side of the machine. Guided by the guide roller, the film extends to the cooling roller, then wraps around and covers the outer circumference of the cooling roller. The water tank chiller continuously supplies low-temperature water to the cooling water pipe inside the cooling roller to cool it down, allowing the film on the surface of the cooling roller to be cooled and shaped. Finally, the film is transferred from the discharge port to the outside of the machine through the guide roller at the discharge port. The two pressure rollers, in conjunction with the drive motor, synchronously drive the pressure roller and the guide roller to form a stable film feeding channel, which makes the film taut and adhered to the cooling roller, reducing the film's deviation or wrinkles during the transmission process, improving the flatness of the finished product, and improving the production quality of the product.

[0008] Preferably, the inner left and right ends of the casing are provided with sliding grooves on the front and rear sides of the cooling roller, and a slider is provided in the sliding groove. A spring is provided at the end of the sliding groove away from the cooling roller, and the left and right ends of the two pressure rollers are respectively connected to the two sliders.

[0009] By adopting the above technical solution, through the structure of grooves, sliders and springs, the pressure roller can adaptively adjust the pressure according to the film thickness, which not only ensures that the film and the cooling roller are in close contact to enhance the cooling effect, but also avoids excessive squeezing that could damage the film and improves process stability.

[0010] Preferably, an air cooler is provided at the upper end of the chassis, and two baffles are arranged horizontally between the air cooler and the cooling roller at the upper inner side of the chassis. The two baffles are arranged in parallel, and a number of air outlet holes are staggered on the two baffles.

[0011] By adopting the above technical solution, the air cooler and baffle can further cool the film. In particular, the staggered air outlet design allows the cold air to be blown evenly onto the film, improving the cooling effect while preventing the film from shaking due to the blowing of the cooling air.

[0012] Preferably, the chassis has ventilation holes at the bottom and a protective net is installed at the ventilation holes.

[0013] By adopting the above technical solutions, the design of ventilation holes and protective nets promotes air circulation inside and outside the chassis while effectively blocking external impurities from entering, ensuring the cleanliness of the film production environment and reducing equipment failure rate.

[0014] Preferably, the center height of the two pressure rollers is lower than the center height of the cooling roller.

[0015] By adopting the above technical solution, the design of the pressure roller center height being lower than that of the cooling roller, combined with the synchronous drive of the pressure roller and guide roller by the drive motor, forms a stable film feeding channel, reduces film offset or wrinkles during transmission, improves the flatness of the finished product, and at the same time increases the contact area between the film and the cooling roller, thereby improving its cooling and shaping efficiency.

[0016] Preferably, the cooling roller has a cooling cavity with a circular cross-section inside, and the cooling water pipe is disposed inside the cooling cavity.

[0017] By adopting the above technical solution, the design of the annular cooling cavity increases the heat exchange area, and combined with the bonding structure of the pressure roller and the cooling roller, the contact time between the film and the cooling surface is extended, ensuring rapid and uniform cooling.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] Firstly, the annular cooling chamber inside the cooling roller is directly connected to the water tank-type water chiller. Combined with the staggered air outlet design at the top, a dual cooling mechanism is formed. Water cooling precisely controls the temperature, while air cooling accelerates surface heat dissipation, avoiding local overheating that could lead to uneven material crystallinity, thereby enhancing the high-temperature stability of the film.

[0020] Secondly, the pressure roller, through the elastic connection of groove, spring and slider, can adaptively adjust the pressure on the film, which can not only avoid mechanical damage to the film due to excessive pressure, but also adapt to the production needs of films of different thicknesses, effectively ensuring that the film can maintain close contact with the cooling roller during the cooling and shaping process.

[0021] Third, the design of the pressure roller center height being lower than that of the cooling roller allows the film to form appropriate tension during transport, reducing wrinkles and deviations and ensuring film flatness. At the same time, this design also effectively increases the effective contact area between the cooling roller and the film, improving the film's cooling efficiency.

[0022] Fourth, the annular cooling chamber design increases the contact area between the cooling water and the cooling roller. Combined with the auxiliary heat dissipation of the air-cooling system, the cooling rate is significantly improved compared with the traditional single-sided cooling method, which helps to shorten the production cycle. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of an apparatus for producing polypropylene film for high-temperature capacitors.

[0024] Figure 2 This is a front view of an apparatus for producing polypropylene film for high-temperature capacitors.

[0025] Reference numerals in the attached diagram: 1. Chassis; 2. Feed inlet; 3. Discharge outlet; 4. Guide roller; 5. Cooling roller; 6. Cooling water pipe; 7. Water tank chiller; 8. Pressure roller; 9. Slide groove; 10. Spring; 11. Air cooler; 12. Baffle; 13. Air outlet; 14. Protective net; 15. Cooling chamber. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the present utility model and simplifying the description. They do not indicate or imply that the device or element 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 the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0027] An apparatus for producing polypropylene film for high-temperature capacitors, such as Figures 1-2 As shown, the machine includes a casing 1, with an inlet 2 and an outlet 3 at its front and rear ends, respectively. Guide rollers 4 are installed inside the casing 1 at both the inlet 2 and outlet 3. A cooling roller 5 is located in the middle of the inner side of the casing 1, with a cooling water pipe 6 inside the cooling roller 5. A water tank chiller 7 is located outside the casing 1, and the cooling water pipe 6 is connected to the water tank chiller 7. After stretching, the film enters the casing 1 through the inlet 2 at the front. Guided by the guide rollers 4, the film extends to the cooling roller 5, then wraps around and covers the outer circumference of the cooling roller 5. The water tank chiller 7 continuously supplies low-temperature water to the cooling water pipe 6 inside the cooling roller 5. Water is used to cool the cooling roller 5, allowing the film on its surface to cool and solidify. Finally, the film is conveyed from the outlet 3 to the outside of the machine housing 1 via the guide roller 4. Pressure rollers 8 are installed on both the front and rear sides of the cooling roller 5, forming a feeding channel between the two pressure rollers 8 and the cooling roller 5 for the film to pass through. The machine housing 1 is equipped with a drive motor that drives the pressure rollers 8 and guide rollers 4 to rotate. The two pressure rollers 8, in conjunction with the drive motor, synchronously drive the pressure rollers 8 and guide rollers 4 to form a stable film feeding channel, making the film taut and adhered to the cooling roller 5. This reduces film offset or wrinkles during transmission, improves the flatness of the finished product, and enhances the production quality.

[0028] The inner left and right sides of the casing 1 are provided with sliding grooves 9 on the front and rear sides of the cooling roller 5. A slider is installed in the sliding groove 9. A spring 10 is installed at the end of the sliding groove 9 away from the cooling roller 5. The left and right ends of the two pressure rollers 8 are respectively connected to the two sliders. Through the structure of the sliding grooves 9, sliders and springs 10, the pressure rollers 8 can adaptively adjust the pressure according to the film thickness, which not only ensures that the film and the cooling roller 5 are in close contact to enhance the cooling effect, but also avoids excessive compression that could damage the film and improve the stability of the process. An air cooler 11 is installed at the top of the casing 1. Two baffles 12 are arranged horizontally between the air cooler 11 and the cooling roller 5 at the upper inner side of the casing 1. The two baffles 12 are arranged in parallel and have a number of air outlets 13 staggered on them. The arrangement of the air cooler 11 and the baffles 12 can further cool the film. In particular, the staggered air outlets 13 design allows the cold air to be blown evenly onto the film, which improves the cooling effect and prevents the film from shaking due to the blowing of the cooling air.

[0029] Ventilation holes are provided at the bottom of the casing 1, and a protective net 14 is installed at the ventilation holes. The design of the ventilation holes and the protective net 14 promotes air circulation inside and outside the casing 1 while effectively blocking external impurities from entering, ensuring the cleanliness of the film production environment and reducing the equipment failure rate. The center height of the two pressure rollers 8 is lower than the center height of the cooling roller 5. Through this design, the pressure rollers 8 and the guide roller 4 are synchronously driven by the drive motor to form a stable film feeding channel, reducing the film offset or wrinkles during the transmission process, improving the flatness of the finished product, and increasing the contact surface between the film and the cooling roller 5 to improve its cooling and shaping efficiency. The cooling roller 5 has a cooling cavity 15 with a circular cross-section. The cooling water pipe 6 is set in the cooling cavity 15. The design of the annular cooling cavity 15 increases the heat exchange area. Combined with the bonding structure of the pressure rollers 8 and the cooling roller 5, it prolongs the contact time between the film and the cooling surface, ensuring rapid and uniform cooling.

[0030] When the polypropylene film undergoes cooling and shaping after heating and stretching, it enters the machine 1 through the feed inlet 2 at the front of the machine 1. Guided by the guide roller 4, the film extends to the cooling roller 5. The film passes through the feeding channel between the pressure roller 8 and the cooling roller 5, covering the outer circumference of the cooling roller 5. Meanwhile, the water tank chiller 7 continuously supplies low-temperature water to the cooling water pipe 6 inside the cooling roller 5 to cool it down. Combined with the design of the air cooler 11 and the air outlet 13 of the staggered baffle 12, the film is cooled simultaneously in two ways. This allows the film on the surface of the cooling roller 5 to be cooled and shaped quickly. Finally, it passes through the feeding channel on the other side and is then transported from the discharge port 3 to the outside of the machine 1 through the guide roller 4. This effectively ensures that the film is tightly bonded to the cooling roller 5 during cooling and shaping, enabling efficient and high-quality processing and improving the production quality of the product.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for producing polypropylene film for high temperature resistant capacitor comprising a cabinet (1), characterized in that: The machine case (1) is provided with an inlet (2) and an outlet (3) at the front and rear ends respectively, guide rollers (4) are arranged at the inlet (2) and the outlet (3) on the inner side of the machine case (1), a cooling roller (5) is arranged at the middle of the inner side of the machine case (1), a cooling water pipe (6) is arranged in the cooling roller (5), a water tank type water cooler (7) is arranged on the outer side of the machine case (1), the cooling water pipe (6) is connected with the water tank type water cooler (7), pressure rollers (8) are arranged on the front and rear sides of the cooling roller (5), a feeding channel for the film is formed between the two pressure rollers (8) and the cooling roller (5), and a driving motor is arranged on the machine case (1) to drive the rotation of the pressure rollers (8) and the guide rollers (4).

2. A device for producing polypropylene film for high temperature resistant capacitor according to claim 1, characterized in that: Sliding grooves (9) are arranged at the front and rear sides of the cooling roller (5) on the left and right ends of the inner side of the machine case (1), sliding blocks are arranged in the sliding grooves (9), springs (10) are arranged at the ends of the sliding grooves (9) away from the cooling roller (5), and the left and right ends of the two pressure rollers (8) are connected with the two sliding blocks respectively.

3. A device for producing polypropylene film for high temperature resistant capacitor according to claim 1, characterized in that: An air cooler (11) is arranged on the upper end of the machine case (1), two baffle plates (12) are arranged transversely between the air cooler (11) and the cooling roller (5) on the upper end of the inner side of the machine case (1), the two baffle plates (12) are arranged in parallel, and a plurality of air outlet holes (13) are arranged on the two baffle plates (12) in a staggered manner.

4. The apparatus for producing polypropylene film for high temperature resistant capacitor according to claim 1, wherein: A ventilation hole is arranged at the lower end of the machine case (1), and a protective net (14) is arranged at the ventilation hole of the machine case (1).

5. The apparatus for producing polypropylene film for high temperature resistant capacitor as claimed in claim 1 wherein: The center height of the two pressure rollers (8) is lower than the center height of the cooling roller (5).

6. The apparatus for producing polypropylene film for high temperature resistant capacitor according to claim 1, wherein: A cooling cavity (15) with a circular cross section is arranged in the cooling roller (5), and the cooling water pipe (6) is arranged in the cooling cavity (15).

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