Electrostatic adsorption device of extruder of biaxially oriented film production line

Abstract

The utility model discloses an electrostatic adsorption device of a biaxially oriented film production line extruder, which comprises a base, casings are arranged on two sides of the base, a quenching roller is rotatably connected to one side in each casing through a rotating shaft, a driving roller is rotatably connected to one side, far away from the quenching roller, in each casing, and a motor output shaft arranged on each casing is connected with one end of the driving roller. An electrostatic adsorption assembly is arranged in the top of the machine shell, a piston rod of the air cylinder pushes the frame to move towards the end close to the quenching roller, and therefore the molybdenum wire in the frame is located above a thin film on the surface of the quenching roller, and corona type discharging can be formed when the molybdenum wire is close to the thin film at the moment; the generated positive ions move towards the film surface of the cathode and discharge to adsorb the film surface, and negative charges on the surface of the quenching roller are discarded, so that the film is tightly attached to the quenching roller for cooling on the basis of the coulomb effect, and the problem that the film cannot be tightly attached to the surface of the quenching roller to affect the product quality is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of film production, and in particular relates to an electrostatic adsorption device of an extruder of a biaxially stretched film production line. Background Art

[0002] In the biaxially oriented film production line, an extruder is used to heat and melt polypropylene pellets, converting them into liquid raw materials, and then extrude the liquid raw materials into a continuous molten film through an extrusion head. Finally, it is cooled by a quench roller to become a finished biaxially oriented film.

[0003] Conventionally, after a liquid raw material is extruded into a molten film through an extruder, the film is guided to the surface of a rotating chill roller, and cooling water is introduced into the inside of the chill roller to quickly reduce the roller surface temperature, so that after the molten film contacts the chill roller, the molten film is cooled to prevent the generation of bubbles. However, in the process of the film being guided, the film itself may have wrinkles and sags, which may cause the film to shrink on one side and fail to adhere closely to the surface of the chill roller, resulting in the inability to effectively cool the film, causing bubbles to form in the film, thereby affecting product quality. Utility Model Content

[0004] The utility model aims to provide an electrostatic adsorption device for an extruder of a biaxially oriented film production line to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an electrostatic adsorption device for a biaxially oriented film production line extruder, comprising:

[0006] A base, with casings on both sides of the base, a quenching roller for cooling the film being rotatably connected to one side of the casing via a rotating shaft, a driving roller being rotatably connected to the side of the casing away from the quenching roller, and a motor output shaft provided in the casing being connected to one end of the driving roller, a driven roller being rotatably connected in the casing and located on the top of the driving roller, an electrostatic adsorption component for adsorbing the film to the surface of the quenching roller being provided in the top of the casing, and a high-voltage current being passed through a plurality of molybdenum wires of the electrostatic adsorption component so that the molybdenum wires generate an electrostatic field to tightly adsorb the film to the surface of the quenching roller.

[0007] Preferably, the electrostatic adsorption component comprises a frame and a cylinder. The cylinder is arranged on the top of the casing and a piston rod of the cylinder movably penetrates the casing and is connected to the frame. Two sets of rollers are rotatably connected in the frame.

[0008] Preferably, two ends of the plurality of molybdenum wires are respectively connected to two groups of rollers, two groups of conductive slip rings are provided on the surface of the molybdenum wires, and insulating sheaths are provided inside the frame and on both sides of the molybdenum wires.

[0009] Preferably, a heat conduction plate and a circulation pipe are provided in the quenching roller, and the heat conduction plate is in contact with the circulation pipe, and a water inlet pipe and a water outlet pipe are provided at both ends of the circulation pipe, and the water inlet pipe and the water outlet pipe are respectively connected to two sets of hollow rotating shafts.

[0010] Preferably, both groups of rotating shaft surfaces are provided with rotating joints and the other ends of the rotating joints are connected to the casing, a water tank is provided in the base and a water pump is connected to one side of the water tank through a pipeline, the water pump surface is connected to the rotating joints of one group of rotating shaft surfaces through a first water pipe, and the rotating joints of the other group of rotating shaft surfaces are connected to the water tank through a second water pipe, and a refrigerator is provided on the water tank surface.

[0011] Preferably, a first sprocket is provided at one end of the driving roller, a second sprocket is provided on the rotating shaft surface at one end of the quenching roller, and the first sprocket is connected to the second sprocket via a chain transmission.

[0012] Preferably, a cabinet door is hinged on the surface of the base and a high-voltage cabinet is provided on one side of the cabinet door, and the high-voltage cabinet is electrically connected to the conductive slip ring.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) When cooling the film extruded by the extruder, the motor drives the driving roller and the first sprocket at one end of the driving roller to rotate, and the first sprocket drives the second sprocket through the chain, thereby driving the quenching roller to rotate through the rotating second sprocket. When the rotating driving roller pulls one end of the film to move, a high-voltage current is passed through the conductive slip ring through the high-voltage cabinet, and the conductive slip ring transmits the high-voltage current to a number of molybdenum wires, so that the molybdenum wires are passed through the high-voltage current. At this time, the cylinder is started, and the piston rod of the cylinder pushes the frame to move toward the end close to the quenching roller, so that the molybdenum wire in the frame is located above the film on the surface of the quenching roller. At this time, when the molybdenum wire approaches the film, a corona discharge is formed, and the positive ions generated move to the cathode film surface and discharge to adsorb the film surface, and the negative charge on the surface of the quenching roller is discarded, so that the film is tightly attached to the quenching roller for cooling based on the Coulomb effect between the two, avoiding the problem that the film cannot be tightly attached to the surface of the quenching roller and affects the product quality.

[0015] (2) When the film is cooled by the quenching roller, the water pump is started. The water pump pumps the cooling water in the water tank through the first water pipe into the rotary joint, and then into the hollow rotating shaft through the rotary joint, and enters the circulation pipe through the connection between the rotating shaft and the water inlet pipe, so that the cooling water contacts the heat transfer plate after absorbing the heat of the film through the circulation pipe. The heat on the surface of the heat transfer plate is taken away by the circulating cooling water. After circulating in the circulation pipe for one circle, the cooling water flows back into the water tank through the second water pipe connected to the rotating shaft at the water outlet pipe, so that the cooling water is recycled to avoid wasting resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 It is a top view of the framework of the utility model;

[0019] Figure 4 It is a cross-sectional view of the rapid cooling roller of the utility model.

[0020] In the figure: 1. base; 2. casing; 3. shaft; 4. film; 5. quenching roller; 6. driving roller; 7. driven roller; 8. molybdenum wire; 9. frame; 10. cylinder; 11. roller; 12. conductive slip ring; 13. insulating sheath; 14. heat conducting plate; 15. circulation pipe; 16. water inlet pipe; 17. water outlet pipe; 18. rotary joint; 19. water tank; 20. water pump; 21. second water pipe; 22. refrigerator; 23. first sprocket; 24. second sprocket; 25. chain; 26. cabinet door; 27. high-voltage cabinet; 28. motor; 29. ​​first water pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides Figure 1-4 The electrostatic adsorption device of a biaxially oriented film production line extruder shown comprises:

[0023] A base 1 is provided with a casing 2 on both sides of the base 1, a quenching roller 5 for cooling a film 4 is rotatably connected to one side of the casing 2 through a rotating shaft 3, a driving roller 6 is rotatably connected to the side of the casing 2 away from the quenching roller 5, and the output shaft of a motor 28 provided in the casing 2 is connected to one end of the driving roller 6, a driven roller 7 is rotatably connected in the casing 2 and located on the top of the driving roller 6, an electrostatic adsorption component for adsorbing the film 4 to the surface of the quenching roller 5 is provided in the top of the casing 2, and a high-voltage current is passed through a plurality of molybdenum wires 8 of the electrostatic adsorption component so that the molybdenum wires 8 generate an electrostatic field to tightly adsorb the film to the surface of the quenching roller 5.

[0024] The electrostatic adsorption assembly includes a frame 9 and a cylinder 10. The cylinder 10 is arranged on the top of the housing 2 and the piston rod of the cylinder 10 movably penetrates the housing 2 and is connected to the frame 9. Two groups of rollers 11 are rotatably connected in the frame 9.

[0025] The two ends of the several molybdenum wires 8 are respectively connected to two groups of rollers 11, and two groups of conductive slip rings 12 are provided on the surface of the molybdenum wires 8. Insulating sheaths 13 are provided in the frame 9 and on both sides of the molybdenum wires 8. The insulating sheaths 13 protect the molybdenum wires 8 from external interference at the edge, ensuring the uniform distribution of the electrostatic field.

[0026] The cooling roller 5 is provided with a heat conducting plate 14 and a circulation pipe 15, and the heat conducting plate 14 is in contact with the circulation pipe 15. The two ends of the circulation pipe 15 are respectively provided with a water inlet pipe 16 and a water outlet pipe 17, and the water inlet pipe 16 and the water outlet pipe 17 are respectively connected to two groups of hollow rotating shafts 3. The heat conducting plate 14 is made of aluminum plate and has good thermal conductivity.

[0027] A rotating joint 18 is provided on the surface of the two groups of rotating shafts 3, and the other end of the rotating joint 18 is connected to the casing 2. When the quenching roller 5 rotates, the rotating shafts 3 on both sides of the quenching roller 5 can rotate in the rotating joint 18. A water tank 19 is provided in the base 1, and a water pump 20 is connected to one side of the water tank 19 through a pipeline. The surface of the water pump 20 is connected to the rotating joint 18 on the surface of one group of rotating shafts 3 through a first water pipe 29, and the rotating joint 18 on the surface of the other group of rotating shafts 3 is connected to the water tank 19 through a second water pipe 21. A refrigerator 22 is provided on the surface of the water tank 19, and the refrigerator 22 can be used to cool the water in the water tank 19 to maintain a good cooling effect.

[0028] A first sprocket 23 is disposed at one end of the driving roller 6 , and a second sprocket 24 is disposed on the surface of the rotating shaft 3 at one end of the quenching roller 5 . The first sprocket 23 and the second sprocket 24 are connected to each other through a chain 25 .

[0029] A cabinet door 26 is hinged on the surface of the base 1 and a high-voltage cabinet 27 is provided on one side of the cabinet door 26 . The high-voltage cabinet 27 is electrically connected to the conductive slip ring 12 . Cooling water can be added to the water tank 19 by opening the hinged cabinet door 26 .

[0030] The electrostatic adsorption device of the extruder of the biaxially oriented film production line cools down the film 4 extruded by the extruder, and the motor 28 drives the driving roller 6 and the first sprocket 23 at one end of the driving roller 6 to rotate, and the first sprocket 23 drives the second sprocket 24 through the chain 25, thereby driving the quenching roller 5 to rotate through the rotating second sprocket 24, and when the rotating driving roller 6 pulls one end of the film 4 to move, at this time, the conductive slip ring 12 is passed through the high-voltage cabinet 27. The conductive slip ring 12 transmits the high-voltage current to a plurality of molybdenum wires 8, so that the molybdenum wires 8 are passed through the high-voltage current. Start the cylinder 10, and the piston rod of the cylinder 10 pushes the frame 9 to move toward the end close to the quench roller 5, so that the molybdenum wire 8 in the frame 9 is located above the film 4 on the surface of the quench roller 5. At this time, when the molybdenum wire 8 is close to the film 4, a corona discharge will be formed, and the positive ions generated will move toward the cathode surface of the film 4 and discharge to make the surface of the film 4 adsorbed, and the negative charge on the surface of the quench roller 5 is discarded, so that the film 4 is tightly attached to the quench roller 5 for cooling based on the Coulomb effect between the two, avoiding the problem that the film 4 cannot be tightly attached to the surface of the quench roller 5 and affects the product quality.

[0031] When the film 4 is cooled by the quench roller 5, the water pump 20 is started. The water pump 20 pumps the cooling water in the water tank 19 into the rotary joint 18 through the first water pipe 29, and enters the hollow rotating shaft 3 through the rotary joint 18, and enters the circulation pipe 15 through the connection between the rotating shaft 3 and the water inlet pipe 16, so as to contact the heat conducting plate 14 after absorbing the heat of the film 4 through the circulation pipe 15, and the heat on the surface of the heat conducting plate 14 is taken away by the circulating cooling water. After circulating one circle in the circulation pipe 15, the cooling water flows back into the water tank 19 through the second water pipe 21 connected to the rotating shaft 3 at the water outlet pipe 17, so as to recycle the cooling water and avoid wasting resources.

[0032] 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 protection scope of the present invention.

Claims

1. An electrostatic adsorption device for a biaxially oriented film production line extruder, characterized in that: include: A base (1) is provided with a casing (2) on both sides of the base (1), one side of the casing (2) is rotatably connected to a quenching roller (5) for cooling a film (4) via a rotating shaft (3), a driving roller (6) is rotatably connected to the side of the casing (2) away from the quenching roller (5), and the casing (2) is provided with a motor (28) whose output shaft is connected to one end of the driving roller (6), a driven roller (7) is rotatably connected to the top of the driving roller (6) in the casing (2), and an electrostatic adsorption component for adsorbing the film (4) on the surface of the quenching roller (5) is provided on the top of the casing (2), and a high voltage current is passed through a plurality of molybdenum wires (8) of the electrostatic adsorption component so that the molybdenum wires (8) generate an electrostatic field to tightly adsorb the film on the surface of the quenching roller (5).

2. The electrostatic adsorption device of a biaxially oriented film production line extruder according to claim 1, characterized in that: The electrostatic adsorption component comprises a frame (9) and a cylinder (10). The cylinder (10) is arranged on the top of the casing (2). The piston rod of the cylinder (10) movably penetrates the casing (2) and is connected to the frame (9). Two groups of rollers (11) are rotatably connected in the frame (9).

3. The electrostatic adsorption device of a biaxially oriented film production line extruder according to claim 2, characterized in that: The two ends of the plurality of molybdenum wires (8) are respectively connected to two groups of rollers (11); two groups of conductive slip rings (12) are provided on the surface of the molybdenum wires (8); and insulating sheaths (13) are provided inside the frame (9) and on both sides of the molybdenum wires (8).

4. The electrostatic adsorption device of a biaxially oriented film production line extruder according to claim 1, characterized in that: The cooling roller (5) is provided with a heat conducting plate (14) and a circulation pipe (15), and the heat conducting plate (14) is in contact with the circulation pipe (15). The two ends of the circulation pipe (15) are provided with a water inlet pipe (16) and a water outlet pipe (17), respectively, and the water inlet pipe (16) and the water outlet pipe (17) are respectively connected to two groups of hollow rotating shafts (3).

5. The electrostatic adsorption device of a biaxially oriented film production line extruder according to claim 1, characterized in that: The surfaces of the two groups of rotating shafts (3) are both provided with rotating joints (18), and the other ends of the rotating joints (18) are connected to the casing (2). A water tank (19) is provided in the base (1), and one side of the water tank (19) is connected to a water pump (20) through a pipeline. The surface of the water pump (20) is connected to the rotating joints (18) on the surface of one group of rotating shafts (3) through a first water pipe (29), and the rotating joints (18) on the surface of the other group of rotating shafts (3) are connected to the water tank (19) through a second water pipe (21). A refrigerator (22) is provided on the surface of the water tank (19).

6. The electrostatic adsorption device of a biaxially oriented film production line extruder according to claim 1, characterized in that: A first sprocket (23) is provided at one end of the driving roller (6), and a second sprocket (24) is provided on the surface of the rotating shaft (3) at one end of the quenching roller (5). The first sprocket (23) and the second sprocket (24) are connected by a chain (25).

7. The electrostatic adsorption device of a biaxially oriented film production line extruder according to claim 3, characterized in that: A cabinet door (26) is hingedly connected to the surface of the base (1), and a high-voltage cabinet (27) is provided on one side of the cabinet door (26), wherein the high-voltage cabinet (27) is electrically connected to the conductive slip ring (12).

Images