An antistatic device for processing polyvinyl fluoride films

Abstract

This utility model relates to the field of polyvinyl fluoride (PVC) film processing technology, and discloses an antistatic device for PVC film processing, including a base. Three conductive brush rollers (first type) and two conductive brush rollers (second type) are arranged above the base, with the second type brush rollers staggered to the first type. The second type brush rollers can slide elastically up and down. The surface of the first type brush rollers is embedded with spiral-shaped conductive fiber bristle bundles, and the surface of the second type brush rollers is also embedded with spiral-shaped conductive fiber bristle bundles, with the spiral direction of the second type brush rollers opposite to that of the first type brush rollers. This utility model achieves full-area electrostatic elimination without dead zones. Through the staggered arrangement of the conductive brush rollers and the elastic floating structure, it ensures constant pressure contact between the second type brush roller and the PVC film surface, adapting to film thickness fluctuations and surface unevenness, and completely avoiding the electrostatic elimination blind spots caused by uneven pressure in traditional rigid brush rollers.

Description

Technical Field

[0001] This utility model relates to the field of polyvinyl fluoride film processing technology, specifically an antistatic device for polyvinyl fluoride film processing. Background Technology

[0002] Polyvinyl fluoride (PVC) film is widely used in photovoltaic backsheets, architectural films, and specialty packaging due to its excellent weather resistance, chemical stability, and dielectric properties. However, during high-speed film formation or slitting processes, the film surface is prone to accumulating high-density static charges due to friction, leading to problems such as dust adsorption, curling and shifting, and even discharge breakdown, which seriously affects product yield and subsequent processing efficiency.

[0003] Currently, the industry commonly uses ion fans, electrostatic brushes, or humidification to remove static electricity. However, ion fans have problems such as high energy consumption, ozone pollution, and limited effectiveness on highly insulating polyvinyl fluoride membranes. Humidification is limited by ambient temperature and humidity and may cause membrane hydrolysis. While traditional electrostatic brush devices can directly contact and conduct away the charge, they suffer from uneven contact pressure and secondary dust pollution. Brushing in one direction can only conduct away the charge and cannot effectively remove the adsorbed micron-sized dust. Residual particles can easily cause scratches on the membrane surface in subsequent processes. Utility Model Content

[0004] The purpose of this invention is to provide an antistatic device for processing polyvinyl fluoride film, which has the effect of eliminating static electricity over the entire area without dead angles and simultaneously removing dust.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an antistatic device for processing polyvinyl fluoride film, comprising a base, three conductive brush rollers one and two conductive brush rollers two are provided above the base, and the conductive brush rollers two are staggered with the conductive brush rollers one, while the conductive brush rollers two can slide up and down elastically. The surface of the conductive brush rollers one is embedded with spiral conductive fiber bristle bundles one, and the surface of the conductive brush rollers two is embedded with spiral conductive fiber bristle bundles two, and the spiral direction of the conductive fiber bristle bundles two is opposite to that of the conductive fiber bristle bundles one. Grounding components are provided at the ends of the conductive brush rollers one and two, and a height-adjustable cleaning roller is provided on one side of the top of the base.

[0006] A further feature of this invention is that a support foot is fixedly provided at the bottom end of the base, and a fixing hole is provided on the surface of the support foot.

[0007] A further feature of this invention is that three sets of mounting plates are fixedly provided at the top of the base, and a shaft core that is rotatably connected to the mounting plates is fixedly provided in the middle of the conductive brush roller.

[0008] A further feature of this invention is that: two sets of mounting plates two are fixedly provided at the top of the base, which are interleaved with the mounting plate one; each set of mounting plates two has a mounting seat elastically sliding at the top; and a shaft core two that is rotatably connected to the mounting seat is fixedly provided in the middle of the conductive brush roller two.

[0009] A further feature of this invention is that: a connecting frame is slidably provided on the top of the base and fixedly connected to the mounting seat; a mounting plate is fixedly provided on the top of the connecting frame; and a mounting spring sleeved on the outside of the connecting frame is connected between the mounting plate and the corresponding mounting seat.

[0010] A further feature of this invention is that the grounding component includes a conductive post, a conductive ring, a copper braided strip one, and a copper braided strip two. The conductive post is fixedly disposed at the ends of the shaft core one and the shaft core two. The conductive ring is rotatably connected to the end of the conductive post. Adjacent conductive rings are connected by the copper braided strip one. The conductive ring located in the middle position is connected to one end of the copper braided strip two, and the other end of the copper braided strip two is connected to an independent grounding stake. A guide groove is provided on the side of the mounting plate two on one side.

[0011] A further feature of this invention is that: two fixing plates are fixedly provided on one side of the top of the base, and the side of the fixing plates is provided with adjustment grooves. Both ends of the cleaning roller are rotatably provided with fixing seats, and the side of the fixing seats is fixedly provided with adjustment screws corresponding to the adjustment grooves. The ends of the adjustment screws are threaded with two locking nuts.

[0012] In summary, this utility model has the following beneficial effects: It eliminates static electricity across the entire area without dead zones. Through the staggered arrangement of conductive brush rollers and the elastic floating structure, it ensures constant pressure contact between the conductive brush roller and the PVC film surface, adapting to film thickness fluctuations and surface unevenness, completely avoiding the blind spots in static electricity removal caused by uneven pressure in traditional rigid brush rollers; it achieves high efficiency in simultaneous dust removal. The conductive fiber bristle bundles one and two are arranged in opposite spiral directions, inducing slight lateral vibrations on the film surface during charge removal, actively removing adsorbed dust and solving the problem of dust residue from single-direction brushing; and it ensures reliable stepped grounding. Multiple sets of conductive brush rollers form a series grounding network through conductive rings and copper braided strips, ultimately connected to an independent grounding stake, achieving stepped charge conduction and avoiding the problem of increased resistance due to wear in single-point grounding, significantly improving the stability of static electricity removal. Attached Figure Description

[0013] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0014] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention;

[0015] Figure 3This is a schematic diagram of the structure of conductive brush roller one and conductive brush roller two of this utility model;

[0016] Figure 4 This is a schematic diagram of the connecting frame of this utility model;

[0017] Figure 5 This is a schematic diagram of the cleaning roller of this utility model.

[0018] In the diagram: 1. Base; 101. Support leg; 102. Fixing hole; 2. Mounting plate one; 201. Shaft core one; 202. Conductive brush roller one; 203. Conductive fiber bristle bundle one; 3. Mounting plate two; 301. Guide groove; 302. Connecting frame; 303. Mounting disc; 304. Mounting spring; 305. Mounting seat; 306. Shaft core two; 307. Conductive brush roller two; 308. Conductive fiber bristle bundle two; 4. Conductive column; 401. Conductive ring; 402. Copper braided belt one; 403. Copper braided belt two; 5. Fixing plate; 501. Adjustment groove; 502. Fixing seat; 503. Adjusting screw; 504. Locking nut; 505. Cleaning roller. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings of the embodiments thereof.

[0020] Please see Figures 1-5 In this embodiment of the invention, an antistatic device for processing polyvinyl fluoride film includes a base 1. Three conductive brush rollers 202 and two conductive brush rollers 307 are arranged above the base 1, with the conductive brush rollers 307 and conductive brush rollers 202 staggered. The conductive brush rollers 202 are located below the conductive brush rollers 307, achieving a stepped conduction of charge. Simultaneously, the conductive brush rollers 307 can slide elastically up and down, ensuring constant pressure contact between the conductive brush rollers 307 and the polyvinyl fluoride film, avoiding dead zones caused by uneven pressure. The surface of the conductive brush rollers 202 is embedded with spiral conductive fiber bristle bundles 203, and spiral grooves are provided on the surface of the conductive brush rollers 202, allowing the conductive fiber bristle bundles 203 to be embedded inside the spiral grooves. The surface of the conductive brush roller 2 307 is embedded with spiral conductive fiber bristle bundles 2 308. The surface of the conductive brush roller 2 307 is provided with spiral grooves, so that the conductive fiber bristle bundles 2 308 can be embedded in the spiral grooves. The spiral direction of the conductive fiber bristle bundles 2 308 is opposite to that of the conductive fiber bristle bundle 1 203. The staggered spiral direction causes the polyvinyl fluoride film to generate a slight lateral vibration, peeling off and adsorbing dust. Grounding components are provided at the ends of the conductive brush roller 1 202 and the conductive brush roller 2 307 to eliminate static electricity on the conductive brush roller 1 202 and the conductive brush roller 2 307. A height-adjustable cleaning roller 505 is provided on one side of the top of the machine base 1. A micro-adhesive silicone layer is coated on the surface of the cleaning roller 505 to adhere dust to the polyvinyl fluoride film.

[0021] In this embodiment, preferably, the bottom end of the base 1 is fixedly provided with a support leg 101, and the surface of the support leg 101 is provided with a fixing hole 102 for limiting the position of the base 1.

[0022] In this embodiment, preferably, three sets of mounting plates 2 are fixedly provided at the top of the base 1, and a shaft core 201 that is rotatably connected to the mounting plate 2 is fixedly provided in the middle of the conductive brush roller 202, which limits the position of the conductive brush roller 202 and does not interfere with the rotation of the conductive brush roller 202.

[0023] In this embodiment, preferably, the top of the base 1 is fixedly provided with two sets of mounting plates 3 that are staggered with the mounting plate 2. The mounting plates 3 are L-shaped. The top of each set of mounting plates 3 is elastically slidably provided with a mounting seat 305. The middle of the conductive brush roller 307 is fixedly provided with a shaft core 306 that is rotatably connected to the mounting seat 305, which limits the position of the conductive brush roller 307 and does not interfere with the rotation of the conductive brush roller 307.

[0024] In this embodiment, preferably, the top of the base 1 is slidably provided with a connecting frame 302 fixedly connected to the mounting base 305, the top of the connecting frame 302 is fixedly provided with a mounting plate 303, and a mounting spring 304 sleeved on the outside of the connecting frame 302 is connected between the mounting plate 303 and the corresponding mounting base 305. The elasticity of the mounting spring 304 can make the conductive brush roller 307 below adhere to the surface of the polyvinyl fluoride film, which is suitable for polyvinyl fluoride films of different thicknesses.

[0025] In this embodiment, preferably, the grounding component includes a conductive post 4, a conductive ring 401, a copper braided strip 402, and a copper braided strip 403. The conductive post 4 is fixedly installed at the ends of the shaft core 201 and the shaft core 306. The conductive ring 401 is rotatably connected to the ends of the conductive post 4, without interfering with the rotation of the shaft core 201 and the shaft core 306. Adjacent conductive rings 401 are connected by the copper braided strip 402. The conductive ring 401 located in the middle position is connected to one end of the copper braided strip 403, and the other end of the copper braided strip 403 is connected to an independent grounding post to eliminate static electricity on the conductive brush roller 202 and the conductive brush roller 307. A guide groove 301 is provided on the side of the mounting plate 3 on one side, without interfering with the up and down movement of the conductive brush roller 307.

[0026] In this embodiment, preferably, two fixing plates 5 are fixedly provided on one side of the top of the base 1. The side of the fixing plate 5 is provided with an adjustment groove 501. Both ends of the cleaning roller 505 are rotatably provided with fixing seats 502. The side of the fixing seat 502 is fixedly provided with an adjustment screw 503 corresponding to the adjustment groove 501, which can adjust the height of the cleaning roller 505 so that the height of the cleaning roller 505 corresponds to the traction roller of the traction device. The end of the adjustment screw 503 is threaded with two locking nuts 504. The threaded engagement between the locking nuts 504 and the adjustment screw 503 can lock the position of the cleaning roller 505 after the position adjustment.

[0027] During use, when the PVC membrane is pulled over the base 1, it first contacts the conductive brush roller 202. The conductive fiber bristle bundles 203 embedded in the spiral grooves on its surface contact the membrane surface at a fixed angle, and conduct away the surface static charge through physical friction. The membrane continues to travel to the area of ​​the conductive brush roller 307. Since the conductive brush roller 307 forms an elastic floating system through the mounting base 305, the connecting frame 302 and the mounting spring 304, it can adapt to the film thickness fluctuations, so that the conductive fiber bristle bundles 308 always adhere to the membrane surface with a constant pressure, eliminating the contact blind spots caused by uneven film surfaces. The conductive fiber bristle bundles 203 and 308 are arranged in opposite spiral directions. When the membrane passes through the two sets of bristle bundles continuously, During operation, alternating positive and negative shear forces induce slight lateral vibrations on the membrane surface, causing adsorbed dust to peel off. The static charge accumulated on conductive brush roller 202 and conductive brush roller 307 is transferred through the end conductive post 4 to the rotatably connected conductive ring 401. Adjacent conductive rings 401 are connected in series by copper braided strip 402, and finally guided to an independent grounding post through the copper braided strip 403 connected to the middle conductive ring 401, forming a multi-level redundant conductive path. The membrane body that has completed static elimination moves to the end cleaning roller 505 area, where a slightly sticky silicone layer adheres to the residual dust that has been peeled off by vibration. The adjusting screw 503 and the locking nut 504 can adjust the height of the cleaning roller 505 to adapt to different traction equipment.

[0028] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An apparatus for removing static electricity in processing of a polyvinyl fluoride film, comprising a base (1), characterized in that, The base (1) is provided with three conductive brush rollers (202) and two conductive brush rollers (307) above it. The conductive brush rollers (307) are staggered with the conductive brush rollers (202). The conductive brush rollers (307) can slide up and down elastically. The surface of the conductive brush rollers (202) is embedded with spiral conductive fiber bristle bundles (203). The surface of the conductive brush rollers (307) is embedded with spiral conductive fiber bristle bundles (308). The direction of rotation of the conductive fiber bristle bundles (308) is opposite to that of the conductive fiber bristle bundles (203). Grounding components are provided at the ends of the conductive brush rollers (202) and the conductive brush rollers (307). A cleaning roller (505) with height adjustment is provided on one side of the top of the base (1).

2. The electrostatic eliminating device for polyvinyl fluoride film processing according to claim 1, characterized by: The bottom end of the base (1) is fixedly provided with a support leg (101), and the surface of the support leg (101) is provided with a fixing hole (102).

3. The electrostatic eliminating device for polyvinyl fluoride film processing according to claim 1, characterized by: The top of the base (1) is fixedly provided with three sets of mounting plates (2), and the middle part of the conductive brush roller (202) is fixedly provided with a shaft core (201) that is rotatably connected to the mounting plates (2).

4. The electrostatic eliminating device for polyvinyl fluoride film processing according to claim 3, characterized by: The top of the base (1) is fixedly provided with two sets of mounting plates (3) that are interleaved with the mounting plate (2). Each set of mounting plates (3) is elastically slidably provided with a mounting seat (305) at the top. The middle part of the conductive brush roller (307) is fixedly provided with a shaft core (306) that is rotatably connected to the mounting seat (305).

5. The electrostatic eliminating device for polyvinyl fluoride film processing according to claim 4, characterized by: The top of the base (1) is slidably provided with a connecting frame (302) which is fixedly connected to the mounting seat (305). The top of the connecting frame (302) is fixedly provided with a mounting plate (303). A mounting spring (304) sleeved on the outside of the connecting frame (302) is connected between the mounting plate (303) and the corresponding mounting seat (305).

6. The electrostatic eliminating device for polyvinyl fluoride film processing according to claim 4, characterized by: The grounding component includes a conductive post (4), a conductive ring (401), a copper braided strip one (402), and a copper braided strip two (403). The conductive post (4) is fixedly installed at the ends of the shaft core one (201) and the shaft core two (306). The conductive ring (401) is rotatably connected to the end of the conductive post (4). Adjacent conductive rings (401) are connected to each other through the copper braided strip one (402). The conductive ring (401) located in the middle position is connected to one end of the copper braided strip two (403), and the other end of the copper braided strip two (403) is connected to an independent grounding stake. A guide groove (301) is provided on the side of the mounting plate two (3) on one side.

7. The electrostatic eliminating device for polyvinyl fluoride film processing according to claim 1, characterized by: Two fixing plates (5) are fixedly provided on one side of the top of the base (1). The side of the fixing plate (5) is provided with an adjustment groove (501). Both ends of the cleaning roller (505) are rotatably provided with fixing seats (502). The side of the fixing seat (502) is fixedly provided with an adjustment screw (503) corresponding to the adjustment groove (501). The end of the adjustment screw (503) is threaded with two locking nuts (504).

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