Device for uniformly coating nano coating on surface of PET (Polyethylene Terephthalate) film

Abstract

The invention provides a uniform coating device for a nano coating on the surface of a PET (Polyethylene Terephthalate) film, and relates to the technical field of PET film processing. A main supporting frame is welded to the top of the base. Eight PET film conveying rollers are rotationally installed on the main supporting frame, and two nano-paint coating rollers are further rotationally installed on the main supporting frame. The inner sides of the two nano-coating coating rollers are each provided with a nano-coating storage barrel, and the rear ends of the nano-coating storage barrels are each provided with a feeding pipe in a welded mode. Three motors are installed on the front side of the main supporting frame through supports. The two excess material collecting boxes are fixed to the main supporting frame in a welded mode, and the bottoms of the two excess material collecting boxes are each fixedly provided with an excess material discharging pipe in a welded mode. Two hot air dryers are further fixedly installed on the main supporting frame. By means of the device, it can be guaranteed that nano coating is evenly coated, meanwhile, the flatness of the surface of a PET film is guaranteed, waste of the nano coating can be reduced, and the machining efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of PET film processing, and particularly relates to a device for uniformly coating a nano-coating on the surface of a PET film. Background Art

[0002] When processing PET films, a nano-coating is often applied to the surface. The nano-coating can endow the surface of the PET film with hydrophobic and oleophobic properties, improve the corrosion resistance of the PET film, and can also significantly improve the wear resistance and surface hardness of the PET film, extending its service life. When applying the nano-coating, a coating device is required.

[0003] Currently used coating devices mostly apply nano-coating to the surface of PET films by spraying or by scraping with a gravure roll. However, it is very difficult to apply the nano-coating evenly using the above two methods, and there will be excess nano-coating during the coating process, which not only affects the flatness of the PET film surface but also causes waste of the nano-coating. These devices can only coat one side of the PET film with nano-coating at a time during processing, affecting the processing efficiency. Summary of the Invention

[0004] The present invention provides a device for uniformly coating a nano-coating on the surface of a PET film, which can ensure uniform coating of the nano-coating, while ensuring the flatness of the PET film surface, reducing waste of the nano-coating, and improving the processing efficiency.

[0005] The present invention provides a device for uniformly coating a nano-coating on the surface of a PET film, which specifically includes: a base; A main support frame is welded on the top of the base; a total of eight PET film conveying rollers are rotatably installed on the main support frame, and two nano-coating rollers are also rotatably installed on the main support frame; a nano-coating storage cylinder is installed inside each of the two nano-coating rollers, and a feed pipe is welded to the rear end of each nano-coating storage cylinder; a total of three motors are installed on the front side of the main support frame through brackets, and the rear ends of the main shafts of two of the motors are respectively fixedly connected to the front ends of the two nano-coating rollers, and the rear end of the main shaft of the other motor is fixedly connected to the front end of the PET film conveying roller in the upper left; two waste material collection boxes are fixedly connected to the main support frame by welding, and a waste material discharge pipe is also fixedly connected to the bottom of each of the two waste material collection boxes by welding; two hot air dryers are fixedly installed on the main support frame.

[0006] In at least some embodiments, the hot air dryers are both located below one side of the nano-coating rollers, and the lower hot air dryer is located on the right side of the waste material collection box, and the upper hot air dryer is located on the left side of the waste material collection box.

[0007] In at least some embodiments, a cylindrical cavity is provided inside each of the nano - coating rollers, and the outer wall of the nano - coating storage cylinder is in close contact with the inner wall of the nano - coating roller and can rotate in the cylindrical cavity inside it.

[0008] In at least some embodiments, the PET film conveying rollers are divided into two groups, upper and lower, and each group of PET film conveying rollers has two layers. Two nano - coating rollers are respectively located at the lower layer positions in the middle of the upper and lower groups of PET film conveying rollers.

[0009] In at least some embodiments, a cylindrical cavity communicating with the feed pipe is provided inside each of the nano - coating storage cylinders. A row of through - holes penetrating both inside and outside are provided at the top of the nano - coating storage cylinder, and a number of elongated openings penetrating both inside and outside are provided on the outer wall of the nano - coating roller.

[0010] In at least some embodiments, the waste material collection boxes are all located directly below the nano - coating rollers, and the top surface of the waste material collection box is at the same height as the top surface of the nano - coating roller.

[0011] In at least some embodiments, two L - shaped rods are fixedly attached to the outer wall of the rear end of the feed pipe, and one end of each L - shaped rod is welded to the outer wall of the rear side of the main support frame.

[0012] In at least some embodiments, one side outer wall of each of the waste material collection boxes is a V - shaped plate. The V - shaped plates are all inclined structures. The V - shaped plate on the lower - layer waste material collection box is located on the right side of the nano - coating roller, and the V - shaped plate on the upper - layer waste material collection box is located on the left side of the nano - coating roller.

[0013] The present invention provides a device for uniformly coating a nano - coating on the surface of a PET film, having the following beneficial effects: The PET film conveying rollers in the present invention can drive the PET film to move when rotating. The nano - coating roller and the nano - coating storage cylinder cooperate to apply the nano - coating on the surface of the PET film. Then, the V - shaped plate on one side of the waste material collection box will scrape the nano - coating on the surface of the PET film flat by relying on the top surface, so as to ensure that the nano - coating is uniformly coated and at the same time ensure the flatness of the surface of the PET film.

[0014] In addition, the coating in the nano - coating storage cylinder can only ooze out through the elongated opening at the top of the nano - coating roller. Therefore, most of the coating will contact the PET film, and a small amount of excess nano - coating will drip into the waste material collection box for collection. The nano - coating scraped off by the V - shaped plate on one side of the waste material collection box will also flow into the waste material collection box. The recycled nano - coating can be exported for recycling later, reducing the waste of nano - coating. Moreover, the upper and lower groups of PET film conveying rollers and the two nano - coating rollers cooperate to coat the nano - coating on both outer walls of the PET film, improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0016] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0017] In the attached picture: Figure 1 A schematic diagram showing the main shaft side of the overall structure of the present application; Figure 2 A schematic diagram of the rear axle side showing the overall structure of the present application; Figure 3 A schematic diagram of the main shaft side after the PET film is installed in this application is shown; Figure 4 The schematic diagram of the main view after the PET film is installed in the present application is shown; Figure 5 A schematic diagram of the top-axis side of the residual material collection box in the present application is shown; Figure 6 The schematic diagram of the structure of the nano coating coating roller in the present application is shown; Figure 7 A schematic diagram of the structure of a nano coating coating roller in the present application after partial sectioning is shown; Figure 8 The schematic diagram of the structure of the nano coating storage tube after partial sectioning in the present application is shown; Reference numerals list 1. Base; 2. Main support frame; 3. PET film conveying roller; 4. Nano coating coating roller; 5. Nano coating storage cylinder; 6. Feed pipe; 7. Motor; 8. Residual material collection box; 9. Residual material discharge pipe; 10. Hot air dryer. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1 to 8 : The present invention provides a device for uniformly coating a nano-coating on a PET film surface, comprising: a base 1; A main support frame 2 is welded to the top of the base 1. The base 1 is used to support the upper part structure of the device, and the main support frame 2 is used to support the PET film conveying roller 3, the nano-coating roller 4, the motor 7, the waste material collection box 8, and the hot air dryer 10. A total of eight PET film conveying rollers 3 are rotatably installed on the main support frame 2, and two nano-coating rollers 4 are also rotatably installed on the main support frame 2. During use, all three motors 7 can be turned on. When the motors 7 rotate, they will drive the PET film conveying roller 3 in the upper left corner and the two nano-coating rollers 4 to rotate synchronously. When the PET film conveying roller 3 rotates, it will drive the PET film to move continuously. At the same time, the nano-coating roller 4 will also rotate continuously outside the nano-coating storage cylinder 5. During this process, the external nano-coating will first enter the cylindrical cavity inside the nano-coating storage cylinder 5 through the feed pipe 6, and then the nano-coating will seep out through the round hole at the top of the nano-coating storage cylinder 5. And during the rotation of the nano-coating roller 4, the long strip-shaped opening on its outer wall will rotate to the topmost position. Therefore, the nano-coating will also seep out through the long strip-shaped opening at the top of the outer wall of the nano-coating roller 4 and come into contact with the PET film. So the nano-coating will adhere to the surface of the PET film. A nano-coating storage cylinder 5 is installed inside both sides of the two nano-coating rollers 4, and a feed pipe 6 is welded to the rear end of each nano-coating storage cylinder 5. During use, the external nano-coating will first enter the cylindrical cavity inside the nano-coating storage cylinder 5 through the feed pipe 6, and then the nano-coating will seep out through the round hole at the top of the nano-coating storage cylinder 5. Three motors 7 are installed on the front side of the main support frame 2 through brackets. The rear ends of the main shafts of two of the motors 7 are respectively fixedly connected to the front ends of the two nano-coating rollers 4, and the rear end of the main shaft of the other motor 7 is fixedly connected to the front end of the PET film conveying roller 3 in the upper left corner. During use, all three motors 7 can be turned on. When the motors 7 rotate, they will drive the PET film conveying roller 3 in the upper left corner and the two nano-coating rollers 4 to rotate synchronously. Two waste material collection boxes 8 are fixedly installed on the main support frame 2 by welding, and a waste material discharge pipe 9 is also fixedly installed at the bottom of each of the two waste material collection boxes 8 by welding. During use, the excess nano-coating will fall to the inner side of the bottom of the waste material collection box 8, and finally the excess nano-coating will flow out through the waste material discharge pipe 9, which is convenient for recycling. Two hot air dryers 10 are also fixedly installed on the main support frame 2. During use, the PET film coated with nano-coating will move above the hot air dryer 10. Therefore, the hot air blown out by the hot air dryer 10 can dry the nano-coating coated on the surface of the PET film.

[0020] In the embodiment of the present disclosure, as Figures 1 - 4As shown, the hot air dryers 10 are all located below one side of the nano - coating roller 4. The lower hot air dryer 10 is located on the right side of the waste material collection box 8, and the upper hot air dryer 10 is located on the left side of the waste material collection box 8. During use, the PET film coated with nano - coating will move above the hot air dryer 10. Therefore, the hot air blown out by the hot air dryer 10 can dry the nano - coating on the surface of the PET film.

[0021] In the embodiments of the present disclosure, as Figure 6 and Figure 7 shown, a cylindrical cavity is provided inside each of the nano - coating rollers 4. The outer wall of the nano - coating storage cylinder 5 is in close contact with the inner wall of the nano - coating roller 4 and can rotate in the cylindrical cavity inside it. When the motor 7 rotates, it will drive the nano - coating roller 4 to continuously rotate outside the nano - coating storage cylinder 5, and can ensure the stability of the nano - coating roller 4 during rotation.

[0022] In the embodiments of the present disclosure, as Figures 1 - 4 shown, the PET film conveying rollers 3 are divided into two groups, upper and lower, and each group of PET film conveying rollers 3 has two layers. The two nano - coating rollers 4 are respectively located at the lower layer in the middle of the upper and lower groups of PET film conveying rollers 3. The upper and lower groups of PET film conveying rollers 3 on the main support frame 2 cooperate with the two nano - coating rollers 4 to coat the nano - coating on the outer walls of both sides of the PET film. The upper and lower two - layer PET film conveying rollers 3 can ensure the stability of driving the PET film to move. At the same time, the two hot air dryers 10 can also dry the nano - coating coated on the outer walls of both sides of the PET film, thereby completing the coating process.

[0023] In the embodiments of the present disclosure, as Figures 1 - 3 and Figures 6 - 8 shown, a cylindrical cavity communicating with the feed pipe 6 is provided inside each of the nano - coating storage cylinders 5. A row of through - holes penetrating inside and outside are provided at the top of the nano - coating storage cylinder 5. A number of through - long - strip openings penetrating inside and outside are provided on the outer wall of the nano - coating roller 4. During use, the external nano - coating will first enter the cylindrical cavity inside the nano - coating storage cylinder 5 through the feed pipe 6, and then the nano - coating will seep out through the round holes at the top of the nano - coating storage cylinder 5. During the rotation of the nano - coating roller 4, the long - strip openings on its outer wall will rotate to the topmost position. Therefore, the nano - coating will seep out through the long - strip openings at the top of the outer wall of the nano - coating roller 4 and contact the PET film, so the nano - coating will adhere to the surface of the PET film.

[0024] In the embodiments of the present disclosure, as Figures 1 - 4As shown, the waste material collection boxes 8 are all located directly below the nano - coating roller 4, and the top surfaces of the waste material collection boxes 8 and the nano - coating roller 4 are at the same height. During the nano - coating process, the nano - coating dripping outwards will directly fall into the waste material collection boxes 8. Then, when the PET film continues to move, it will closely adhere to the top surface of the V - shaped plate on one side of the waste material collection box 8. At this time, the V - shaped plate on one side of the waste material collection box 8 can scrape the nano - coating flat, thus achieving uniform coating. Moreover, the V - shaped plate can also gather the nano - coating towards the middle position. Subsequently, the excess nano - coating will slide down the inclined outer wall of the V - shaped plate to the inner bottom of the waste material collection box 8.

[0025] In the embodiment of the present disclosure, as Figures 1 - 5 shown, the outer walls on one side of the waste material collection boxes 8 are all V - shaped plates. The V - shaped plates are all inclined structures. The V - shaped plate on the lower - layer waste material collection box 8 is located on the right side of the nano - coating roller 4, and the V - shaped plate on the upper - layer waste material collection box 8 is located on the left side of the nano - coating roller 4. When the PET film moves, it will closely adhere to the top surface of the V - shaped plate on one side of the waste material collection box 8. At this time, the V - shaped plate on one side of the waste material collection box 8 can scrape the nano - coating flat, thus achieving uniform coating. Moreover, the V - shaped plate can also gather the nano - coating towards the middle position. Subsequently, the excess nano - coating will slide down the inclined outer wall of the V - shaped plate to the inner bottom of the waste material collection box 8.

[0026] Embodiment 2: On the basis of Embodiment 1, as Figures 1 - 8 shown, two L - shaped rods are fixedly arranged on the outer wall at the rear end of the feed pipe 6, and one ends of the L - shaped rods are welded to the outer wall at the rear side of the main support frame 2. Therefore, the positions of the feed pipe 6 and the nano - coating storage cylinder 5 can be firmly fixed. In this way, when the nano - coating roller 4 rotates, the nano - coating storage cylinder 5 will not rotate synchronously, ensuring that the round holes on the nano - coating storage cylinder 5 are always located above.

[0027] Working principle of this embodiment: During installation, the device can be supported and fixed on the processing tabletop through the base 1, and an external nano-coating pump is fixedly connected to the rear ends of the two feed pipes 6. When it is necessary to coat the nano-coating on the surface of the PET film, the PET film can be wound around the PET film conveying roller 3 and the nano-coating applying roller 4 in a C shape first, and then all three motors 7 can be turned on. When the motors 7 rotate, they will drive the PET film conveying roller 3 in the upper left corner and the two nano-coating applying rollers 4 to rotate synchronously. When the PET film conveying roller 3 rotates, it will drive the PET film to move continuously. At the same time, the nano-coating applying roller 4 will also rotate continuously outside the nano-coating storage cylinder 5. During this process, the external nano-coating will first enter the cylindrical cavity inside the nano-coating storage cylinder 5 through the feed pipe 6, and then the nano-coating will seep out through the round hole at the top of the nano-coating storage cylinder 5. And during the rotation of the nano-coating applying roller 4, the long strip-shaped opening on its outer wall will rotate to the topmost position. Therefore, the nano-coating will also seep out through the long strip-shaped opening at the top of the outer wall of the nano-coating applying roller 4 and come into contact with the PET film. So the nano-coating will adhere to the surface of the PET film, and the nano-coating that drips outward will directly fall into the waste material collection box 8. Then, as the PET film continues to move, it will closely adhere to the top surface of the V-shaped plate on one side of the waste material collection box 8. At this time, the V-shaped plate on one side of the waste material collection box 8 can scrape the nano-coating flat, thus realizing uniform coating. Moreover, the V-shaped plate can also gather the nano-coating towards the middle position. Subsequently, the excess nano-coating will slide down along the inclined outer wall of the V-shaped plate to the inner bottom of the waste material collection box 8. Finally, the excess nano-coating will flow out through the waste material discharge pipe 9, which is convenient for recycling. Then, the PET film coated with the nano-coating will move above the hot air dryer 10. Therefore, the hot air blown out by the hot air dryer 10 can dry the nano-coating coated on the surface of the PET film. The upper and lower groups of PET film conveying rollers 3 on the main support frame 2 and the two nano-coating applying rollers 4 cooperate to coat the nano-coating on the outer walls of both sides of the PET film. At the same time, the two hot air dryers 10 can also dry the nano-coating coated on the outer walls of both sides of the PET film, thereby completing the coating process.

[0028] In this article, the following points need to be noted: 1. The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure. Other structures can refer to the general design.

[0029] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0030] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A device for uniformly coating a nano-coating on a PET film surface, comprising: The base (1) is characterized by: A main support frame (2) is welded on the top of the base (1); a total of eight PET film conveying rollers (3) are rotatably mounted on the main support frame (2), and two nano-coating rollers (4) are also rotatably mounted on the main support frame (2); a nano-coating storage cylinder (5) is mounted on the inner side of each of the two nano-coating rollers (4), and a feed pipe (6) is welded to the rear end of each of the nano-coating storage cylinders (5); a total of three motors (7) are mounted on the front side of the main support frame (2) through a bracket, and the rear ends of the main shafts of two of the motors (7) are respectively fixedly connected to the front ends of the two nano-coating rollers (4), and the rear end of the main shaft of another motor (7) is fixedly connected to the front end of the PET film conveying roller (3) on the upper left; two residual material collection boxes (8) are fixedly mounted on the main support frame (2) by welding, and a residual material discharge pipe (9) is also fixedly mounted on the bottom of each of the two residual material collection boxes (8) by welding; and two hot air dryers (10) are also fixedly mounted on the main support frame (2).

2. A device for uniformly coating a nano-coating on a PET film surface according to claim 1, characterized in that: The PET film conveying rollers (3) are divided into two groups, an upper group and an lower group, and each group of PET film conveying rollers (3) has two layers. The two nano coating coating rollers (4) are respectively located at the lower layer position between the upper and lower groups of PET film conveying rollers (3).

3. A device for uniformly coating a nano-coating on a PET film surface according to claim 1, characterized in that: The residual material collection box (8) is located directly below the nano coating coating roller (4), and the top surface of the residual material collection box (8) and the top surface of the nano coating coating roller (4) are located at the same height.

4. A device for uniformly coating a nano-coating on a PET film surface according to claim 1, characterized in that: The outer wall of one side of the residual material collection box (8) is a V-shaped plate, and the V-shaped plates are all inclined structures. The V-shaped plates on the lower residual material collection box (8) are located on the right side of the nano-coating coating roller (4), and the V-shaped plates on the upper residual material collection box (8) are located on the left side of the nano-coating coating roller (4).

5. The device for uniformly coating a nano-coating on a PET film surface according to claim 1, characterized in that: The hot air dryers (10) are both located below one side of the nano coating coating roller (4), and the lower hot air dryer (10) is located on the right side of the residual material collection box (8), while the upper hot air dryer (10) is located on the left side of the residual material collection box (8).

6. The device for uniformly coating a nano-coating on a PET film surface according to claim 1, characterized in that: A cylindrical cavity is provided inside the nano-coating coating roller (4), and the outer wall of the nano-coating storage cylinder (5) is in close contact with the inner wall of the nano-coating coating roller (4) and can rotate in the cylindrical cavity inside the nano-coating coating roller (4).

7. The device for uniformly coating a nano-coating on a PET film surface according to claim 1, characterized in that: The nano-coating storage cylinder (5) is provided with a cylindrical cavity in communication with the feed pipe (6), the top of the nano-coating storage cylinder (5) is provided with a row of circular holes penetrating inside and outside, and the outer wall of the nano-coating coating roller (4) is provided with a plurality of long strip openings penetrating inside and outside.

8. The device for uniformly coating a nano-coating on a PET film surface according to claim 1, characterized in that: Two L-shaped rods are fixed to the rear end outer wall of the feed pipe (6), and one end of the L-shaped rods is welded to the rear side outer wall of the main support frame (2).

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