Film pre-wiping device and double-unwinding and double-rewinding coating production line

Abstract

The present invention discloses a film pre-wiping device and a double unwind and double rewind coating production line with the film pre-wiping device. The film pre-wiping device includes a frame, a first wiping mechanism and a rotary driving mechanism. The first wiping mechanism includes a first wiping roller and a liquid collecting box. A dripping cavity is formed inside the first wiping roller. The outer wall of the first wiping roller is respectively provided with a first spiral hole and a second spiral hole with opposite rotation directions; the liquid collecting box is arranged in the dripping cavity, and the left and right ends of the liquid collecting box are respectively rotatably connected to the left and right inner side walls of the dripping cavity; the rotary driving mechanism is arranged on the frame and is used to drive the first wiping roller to rotate. The inner walls of the first spiral hole and the second spiral hole can simultaneously scrape the water attached to the lower surface of the film inward, so that the water passes through the first spiral hole and the second spiral hole and drips into the liquid collecting box. The film pre-wiping device can pre-scrape and collect part of the water attached to the film, which is beneficial to improving the water removal effect of the water absorption device.

Description

Technical Field

[0001] The present invention relates to the technical field of coating processing, and particularly to a film pre-water scraping device and a double unwind and double rewind coating production line. Background Art

[0002] Coating processing is a technical process for uniformly coating a coating on the surface of a film. Some specific coatings are difficult to solidify, so it is necessary to soak the film and the specific coating on the film in water to accelerate the solidification of the specific coating. The commonly used soaking water method is to set a solidification tank filled with water, and multiple driving rollers are arranged in the solidification tank. The multiple driving rollers are used to traction the film, so that the film and the specific coating on the film can be soaked in water, and then the specific coating can be quickly solidified. After the film leaves the solidification tank, water will adhere to the surface of the film, and the adhered water will affect the quality of the coating. Therefore, after the film leaves the solidification tank, it needs to pass through a water absorption device, so that the water absorption device can absorb the water adhered to the film. The water absorption device includes multiple water absorption rollers, and the film is wound around the multiple water absorption rollers, so that the multiple water absorption rollers can absorb the water on the film. In the prior art, due to the relatively fast conveying speed of the film, the multiple water absorption rollers face a relatively high water absorption load in a short time, and thus it is difficult for the multiple water absorption rollers to absorb the water on the film cleanly in a short time, so the water removal effect of the water absorption device is reduced. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a film pre-water scraping device, which can pre-scrape part of the water adhered to the film to reduce the water absorption load of the subsequent water absorption device, and thus is beneficial to improving the water removal effect of the water absorption device.

[0004] The present invention also provides a double unwind and double rewind coating production line having the above-mentioned film pre-water scraping device.

[0005] The film pre - water scraping device according to the embodiment of the first aspect of the present invention includes a frame, a first water scraping mechanism, and a rotary driving mechanism. The first water scraping mechanism includes a first water scraping roller and a liquid collecting box. Both the left and right ends of the first water scraping roller are rotatably connected to the frame. A dripping cavity is formed inside the first water scraping roller. On the left and right sides of the outer wall of the first water scraping roller, a first spiral hole and a second spiral hole with opposite rotation directions are respectively provided. Both the first spiral hole and the second spiral hole are communicated with the dripping cavity. The outer wall of the first water scraping roller is used for winding the film, and the outer wall of the first water scraping roller is kept in contact with the lower surface of the film. The liquid collecting box is arranged in the dripping cavity, and the left and right ends of the liquid collecting box are respectively rotatably connected to the left and right inner side walls of the dripping cavity, so that the liquid collecting box remains stationary relative to the frame under its own gravity, and the opening of the liquid collecting box is kept upward; the rotary driving mechanism is arranged on the frame, and the rotary driving mechanism is used to drive the first water scraping roller to rotate. The inner walls of the first spiral hole and the second spiral hole can simultaneously scrape the water attached to the lower surface of the film inward, so that the water passes through the first spiral hole and the second spiral hole and drips into the liquid collecting box.

[0006] It has at least the following beneficial effects:

[0007] The outer wall of the first water scraping roller is used for winding the film, and the outer wall of the first water scraping roller is kept in contact with the lower surface of the film. The rotary driving mechanism drives the first water scraping roller to rotate around its own axis, so that the first water scraping roller can play a role in pulling the film. During the rotation of the first water scraping roller, the first spiral hole and the second spiral hole rotate around the axis of the first water scraping roller, so that the inner walls of the first spiral hole and the second spiral hole with opposite rotation directions can simultaneously scrape the water attached to the lower surface of the film inward. Then, under the action of the inner walls of the first spiral hole and the second spiral hole, the water can move along the spiral directions of the first spiral hole and the second spiral hole towards the middle of the first water scraping roller, avoiding the water flowing out from the left and right ends of the first water scraping roller and polluting the processing environment. During the process of the water moving towards the middle of the first water scraping roller, the water will pass through the first spiral hole and the second spiral hole and fall into the dripping cavity inside the first water scraping roller. And the liquid collecting box located in the dripping cavity remains stationary relative to the frame under its own gravity, that is, the liquid collecting box does not rotate with the first water scraping roller, so that the water dripping from the first spiral hole and the second spiral hole can fall into the liquid collecting box, thus completing the scraping and collection of part of the water attached to the lower surface of the film. This film pre - water scraping device can pre - scrape and collect part of the water attached to the film, reducing the water absorption load of the subsequent water absorption device, so it is beneficial to improve the water removal effect of the water absorption device.

[0008] The film pre - water scraping device according to the embodiment of the first aspect of the present invention further includes a pumping mechanism. The pumping mechanism is arranged on the frame. The first water scraping mechanism further includes an installation pipe. The installation pipe is arranged at one end of the first water scraping roller and is communicated with the dripping cavity. The pumping end of the pumping mechanism passes through the installation pipe and extends into the liquid collecting box, so that the pumping mechanism can pump the water collected in the liquid collecting box.

[0009] According to the thin film pre - wiper device of the first - aspect embodiment of the present invention, the first wiper mechanism further includes a first magnetic attraction member and a second magnetic attraction member. The first magnetic attraction member is disposed at one end of the liquid collection box, and the second magnetic attraction member is disposed on the frame. The first magnetic attraction member and the second magnetic attraction member are magnetically attracted to each other so that the liquid collection box remains stationary relative to the frame.

[0010] According to the thin film pre - wiper device of the first - aspect embodiment of the present invention, the first wiper mechanism further includes a splash - proof perforated plate. The splash - proof perforated plate is disposed in the liquid collection box so that the water dripping from the first spiral hole and the second spiral hole can fall on the splash - proof perforated plate.

[0011] According to the thin film pre - wiper device of the first - aspect embodiment of the present invention, it further includes a second wiper mechanism for scraping the water adhering to the upper surface of the thin film.

[0012] According to the thin film pre - wiper device of the first - aspect embodiment of the present invention, the second wiper mechanism includes a liquid collection tank, a second wiper roller, two water collection sleeves, and two drain pipes;

[0013] Both the left and right ends of the second wiper roller are rotatably connected to the frame. The first wiper roller and the second wiper roller are arranged in sequence along the conveying direction of the thin film. The second wiper roller is located below the first wiper roller. First spiral grooves and second spiral grooves are respectively provided on the left and right sides of the outer wall of the second wiper roller. The spiral direction of the first spiral groove is the same as that of the first spiral hole, and the spiral direction of the second spiral groove is the same as that of the second spiral hole. The outer wall of the second wiper roller is for the thin film to wind around, and the outer wall of the second wiper roller is kept in contact with the upper surface of the thin film;

[0014] Both of the two water collection sleeves are disposed on the frame. The two water collection sleeves are respectively sleeved on the left and right ends of the second wiper roller. A gap for water to flow is left between the outer wall of the two water collection sleeves and the second wiper roller. The area between the two water collection sleeves is for the thin film to move;

[0015] The rotation driving mechanism can drive the second wiper roller to rotate so that the inner walls of the first spiral groove and the second spiral groove can scrape the water adhering to the upper surface of the thin film and make the water in the first spiral groove and the second spiral groove respectively flow into the two water collection sleeves;

[0016] The two drain pipes are respectively disposed at the lower ends of the two water collection sleeves. The two drain pipes are respectively communicated with the two water collection sleeves so that the water in the two water collection sleeves can respectively flow into the two drain pipes;

[0017] The liquid collecting tank is arranged on the frame, and the liquid collecting tank is communicated with the two drain pipes, so that the water in the two drain pipes can flow into the liquid collecting tank.

[0018] In the film pre-water scraping device according to the first aspect embodiment of the present invention, water blocking arc plates are arranged on one side of the two water collecting sleeves facing each other, and the two water blocking arc plates are both located below the second water scraping roller. The gaps between the two water blocking arc plates and the outer wall of the second water scraping roller are used for the film to move, so that the water dripping from both sides of the film can respectively fall on the two water blocking arc plates, and the water on the two water blocking arc plates can respectively flow into the two water collecting sleeves.

[0019] In the film pre-water scraping device according to the first aspect embodiment of the present invention, the positions of the two water collecting sleeves in the left-right direction can be adjusted, so that the distance between the two water collecting sleeves can be adjusted.

[0020] The film pre-water scraping device according to the first aspect embodiment of the present invention further includes a bracket, two slide rails, two sliders and two lead screw nut driving mechanisms. The bracket is arranged on the frame, and the bracket is located below the second water scraping roller. The two slide rails are both parallel to the left-right direction and are arranged on the bracket. The two sliders are respectively arranged on the two water collecting sleeves, and the two sliders are respectively slidably connected to the two slide rails. The two lead screw nut driving mechanisms are both arranged on the frame, and the output ends of the two lead screw nut driving mechanisms are respectively connected to the two water collecting sleeves. The two lead screw nut driving mechanisms can respectively drive the two water collecting sleeves to move in the left-right direction, so that the two water collecting sleeves approach or move away from each other, and the distance between the two water collecting sleeves can be adjusted.

[0021] The double-unwinding and double-winding coating production line according to the second aspect embodiment of the present invention includes two continuous coating devices, one of the continuous coating devices is arranged above the other continuous coating device. The two continuous coating devices both include an automatic unwinding device, a coating device, a solidification tank, a water absorption device, an oven, a deviation rectifying device, an automatic winding device and the film pre-water scraping device according to the first aspect embodiment of the above. The automatic unwinding device, the coating device, the solidification tank, the film pre-water scraping device, the water absorption device, the oven, the deviation rectifying device and the automatic winding device are arranged in sequence along the conveying path of the film.

[0022] It has at least the following beneficial effects: This double-unwinding and double-winding coating production line has all the beneficial effects brought by the above film pre-water scraping device, and will not be repeated here.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0024] The present invention will be further described below in conjunction with the drawings and embodiments, where:

[0025] Figure 1 is a schematic diagram of the film running structure of the film pre-wiping device according to an embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of the structure of the film pre-wiping device;

[0027] Figure 3 is a schematic diagram of the structure of the first wiping mechanism in the film pre-wiping device;

[0028] Figure 4 is Figure 3 a partial enlarged view of part A in

[0029] Figure 5 is a schematic diagram of the internal structure of the first wiping roller in the film pre-wiping device;

[0030] Figure 6 is a schematic diagram of the structure of the liquid collecting box in the film pre-wiping device;

[0031] Figure 7 is a schematic diagram of the structure of the second wiping mechanism in the film pre-wiping device;

[0032] Figure 8 is Figure 7 a partial enlarged view of part B in

[0033] Figure 9 is a partial structure schematic diagram of the second wiping mechanism in the film pre-wiping device;

[0034] Figure 10 is a side view of the film running of the first wiping roller and the second wiping roller in the film pre-wiping device;

[0035] Figure 11 is a top view schematic diagram of the first wiping roller and the second wiping roller in the film pre-wiping device;

[0036] Figure 12 is a schematic diagram of the structure of the water collecting sleeve of another embodiment of the present invention;

[0037] Reference Numerals in the Drawings:

[0038] The first wiping mechanism 100; the first wiping roller 110; the first spiral hole 111; the second spiral hole 112; the dripping cavity 113; the liquid collecting box 120; the anti-splash perforated plate 121; the mounting pipe 130;

[0039] Second wiper mechanism 200; second wiper roller 210; first spiral groove 211; second spiral groove 212; water collecting sleeve 220; water blocking arc plate 221; drain pipe 230;

[0040] Bracket 300; slide rail 310; slider 320;

[0041] Frame 400. Detailed implementation manner

[0042] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., refer to the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present invention.

[0043] In the description of the present invention, if the first and second are described only for the purpose of distinguishing technical features, it should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0044] In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0045] Refer to Figures 1 to 5 , the present invention discloses a thin film pre-wiping device, including a frame 400, a first wiper mechanism 100 and a rotation driving mechanism (not shown in the figure).

[0046] The first wiper mechanism 100 includes a first wiper roller 110 and a liquid collecting box 120. Both the left and right ends of the first wiper roller 110 are rotatably connected to the frame 400. A dripping cavity 113 is formed inside the first wiper roller 110. On the left and right sides of the outer wall of the first wiper roller 110, a first spiral hole 111 and a second spiral hole 112 with opposite spiral directions are respectively provided. Both the first spiral hole 111 and the second spiral hole 112 communicate with the dripping cavity 113. The outer wall of the first wiper roller 110 is for the film to be wound around. The outer wall of the first wiper roller 110 is kept in contact with the lower surface of the film. The liquid collecting box 120 is arranged inside the dripping cavity 113. The left and right ends of the liquid collecting box 120 are respectively rotatably connected to the left and right inner side walls of the dripping cavity 113, so that the liquid collecting box 120 remains stationary relative to the frame 400 under its own gravity, and the opening of the liquid collecting box 120 is kept upward; a rotation driving mechanism is arranged on the frame 400. The rotation driving mechanism is used to drive the first wiper roller 110 to rotate. The inner walls of the first spiral hole 111 and the second spiral hole 112 can simultaneously scrape the water attached to the lower surface of the film inward, so that the water passes through the first spiral hole 111 and the second spiral hole 112 and drips into the liquid collecting box 120.

[0047] In the embodiment of the present invention, the film is conveyed from back to front. The first wiper roller 110 is parallel to the left - right direction. The outer wall of the first wiper roller 110 is for the film to be wound around, so that the outer wall of the first wiper roller 110 can be kept in contact with the lower surface of the film. The output end of the rotation driving mechanism is connected to the first wiper roller 110. The rotation driving mechanism can drive the first wiper roller 110 to rotate around its own axis, so that the first wiper roller 110 can play a role in pulling the film. The left and right ends of the liquid collecting box 120 are respectively rotated on the left and right inner side walls of the dripping cavity 113 inside the first wiper roller 110. Therefore, during the rotation of the first wiper roller 110 and under the action of the own gravity of the liquid collecting box 120, the first wiper roller 110 will not drive the liquid collecting box 120 to rotate, that is, the liquid collecting box 120 can remain stationary relative to the frame 400, and the opening of the liquid collecting box 120 is kept upward. In the embodiment of the present invention, the opening of the liquid collecting box 120 is always upward, and the bottom plate of the liquid collecting box 120 is an arc plate. A counterweight is provided at the lowermost end of the bottom plate of the liquid collecting box 120. The counterweight can increase the overall weight of the liquid collecting box 120 and lower the overall center of gravity of the liquid collecting box 120, ensuring that the first wiper roller 110 can remain stationary relative to the frame 400 during the rotation process and ensuring that the liquid collecting port (opening) of the liquid collecting box 120 remains upward.

[0048] In the embodiment of the present invention, the spiral directions of the first spiral hole 111 and the second spiral hole 112 are opposite, and the rotation direction of the first wiper roller 110 matches the spiral directions of the first spiral hole 111 and the second spiral hole 112, so that the inner wall of the first spiral hole 111 can convey water from left to right, and the inner wall of the second spiral hole 112 can convey water from right to left. That is, the inner walls of the first spiral hole 111 and the second spiral hole 112 can simultaneously scrape inward and convey the water attached to the lower surface of the film. Inward means toward the middle of the first wiper roller 110. In the embodiment of the present invention, the film pre-wiping device and the water absorption device are arranged in sequence along the conveying direction of the film, that is, the film first passes through the film pre-wiping device and then enters the water absorption device.

[0049] It can be understood that the outer wall of the first wiper roller 110 is used for the film to wind around, and the outer wall of the first wiper roller 110 is in contact with the lower surface of the film. The rotation driving mechanism drives the first wiper roller 110 to rotate around its own axis, so that the first wiper roller 110 can play a role in pulling the film. During the rotation of the first wiper roller 110, the first spiral hole 111 and the second spiral hole 112 rotate around the axis of the first wiper roller 110, so that the inner walls of the first spiral hole 111 and the second spiral hole 112 with opposite spiral directions can simultaneously scrape the water attached to the lower surface of the film inward. As a result, under the action of the inner walls of the first spiral hole 111 and the second spiral hole 112, the water can move along the spiral directions of the first spiral hole 111 and the second spiral hole 112 toward the middle of the first wiper roller 110, avoiding the water flowing out from the left and right ends of the first wiper roller 110 and polluting the processing environment. During the process of the water moving toward the middle of the first wiper roller 110, the water will pass through the first spiral hole 111 and the second spiral hole 112 and fall into the dripping cavity 113 inside the first wiper roller 110. The liquid collecting box 120 located in the dripping cavity 113 remains stationary relative to the frame 400 under its own gravity, that is, the liquid collecting box 120 does not rotate with the first wiper roller 110, and the opening of the liquid collecting box 120 faces upward, so that the water dripping from the first spiral hole 111 and the second spiral hole 112 can fall into the liquid collecting box 120, thereby completing the scraping and collection of part of the water attached to the lower surface of the film. The film pre-wiping device can pre-scrape and collect part of the water attached to the film, reducing the water absorption load of the subsequent water absorption device, so it is beneficial to improve the water removal effect of the water absorption device and ensure the water removal effect of the film.

[0050] In an embodiment of the present invention, the bottom plate of the liquid collecting box 120 is an arc plate with a 180° arc, and the arc plate is half of the pipe. The central axis of the pipe coincides with the axis of the first water scraping roller 110, that is, the axis of the arc plate coincides with the axis of the first water scraping roller 110. When the thin film is wound around the outer wall of the first water scraping roller 110, the wrap angle between the thin film and the outer wall of the first water scraping roller 110 is less than 180°, so that the water scraped by the inner walls of the first spiral hole 111 and the second spiral hole 112 can fall into the dripping cavity 113, and the water in the dripping cavity 113 can fall into the liquid collecting box 120.

[0051] Reference Figure 5 and Figure 6 Moreover, the thin film pre-water scraping device further includes a pumping mechanism (not shown in the figure). The pumping mechanism is arranged on the frame 400. The first water scraping mechanism 100 further includes a mounting pipe 130. The mounting pipe 130 is arranged at one end of the first water scraping roller 110 and communicates with the dripping cavity 113. The pumping end of the pumping mechanism passes through the mounting pipe 130 and extends into the liquid collecting box 120, so that the pumping mechanism can pump the water collected in the liquid collecting box 120. It can be understood that the central axis of the mounting pipe 130 coincides with the central axis of the first water scraping roller 110, and the mounting pipe 130 can rotate with the first water scraping roller 110. The mounting pipe 130 communicates with the dripping cavity 113 in the first water scraping roller 110, so that the pumping end of the pumping mechanism can extend into the liquid collecting box 120 in the dripping cavity 113 through the mounting pipe 130, and the pumping end of the pumping mechanism does not rotate with the first water scraping roller 110. Furthermore, the pumping mechanism can pump the water in the liquid collecting box 120 to prevent the water in the liquid collecting box 120 from overflowing and dripping into the processing environment, thus preventing the processing environment from being polluted. The pumping mechanism is a common suction mechanism and will not be further elaborated here.

[0052] In an embodiment of the present invention, the first water scraping mechanism 100 further includes a first magnetic attracting member and a second magnetic attracting member. The first magnetic attracting member is arranged at one end of the liquid collecting box 120, and the second magnetic attracting member is arranged on the frame 400. The first magnetic attracting member and the second magnetic attracting member attract each other magnetically, so that the liquid collecting box 120 remains stationary relative to the frame 400. It can be understood that through the mutual magnetic attraction of the first magnetic attracting member and the second magnetic attracting member, the liquid collecting box 120 can be stably held in a specific position under the combined influence of its own gravity and the magnetic attraction force, so that the liquid collecting box 120 will not generate excessive shaking or displacement due to the rotation of the first water scraping roller 110, ensuring that the opening of the liquid collecting box 120 always faces upward. Furthermore, the liquid collecting box 120 can accurately collect the water entering the dripping cavity 113. In an embodiment of the present invention, both the first magnetic attracting member and the second magnetic attracting member can be magnets that can attract each other magnetically and will not be further elaborated here.

[0053] Reference Figure 1 、 Figures 7 to 11, the film pre-wiping device further includes a second wiping mechanism 200 for wiping the water adhering to the upper surface of the film. The second wiping mechanism 200 includes a liquid collecting tank (not shown in the figure), a second wiping roller 210, two water collecting sleeves 220, and two drain pipes 230.

[0054] Both the left and right ends of the second wiping roller 210 are rotatably connected to the frame 400. The first wiping roller 110 and the second wiping roller 210 are arranged in sequence along the conveying direction of the film. The second wiping roller 210 is located below the first wiping roller 110. On the left and right sides of the outer wall of the second wiping roller 210, a first spiral groove 211 and a second spiral groove 212 are respectively provided. The spiral direction of the first spiral groove 211 is the same as that of the first spiral hole 111, and the spiral direction of the second spiral groove 212 is the same as that of the second spiral hole 112. The outer wall of the second wiping roller 210 is used for the film to wind around. The outer wall of the second wiping roller 210 is kept in contact with the upper surface of the film; both water collecting sleeves 220 are arranged on the frame 400, and the two water collecting sleeves 220 are respectively sleeved on the left and right ends of the second wiping roller 210. A gap for water to flow is left between the two water collecting sleeves 220 and the outer wall of the second wiping roller 210. The area between the two water collecting sleeves 220 is used for the film to move; the rotation driving mechanism can drive the second wiping roller 210 to rotate, so that the inner walls of the first spiral groove 211 and the second spiral groove 212 can scrape the water adhering to the upper surface of the film, and the water in the first spiral groove 211 and the second spiral groove 212 can respectively flow into the two water collecting sleeves 220; the two drain pipes 230 are respectively arranged at the lower ends of the two water collecting sleeves 220, and the two drain pipes 230 are respectively communicated with the two water collecting sleeves 220, so that the water in the two water collecting sleeves 220 can respectively flow into the two drain pipes 230; the liquid collecting tank is arranged on the frame 400, and the liquid collecting tank is communicated with the two drain pipes 230, so that the water in the two drain pipes 230 can flow into the liquid collecting tank.

[0055] In the embodiment of the present invention, the second wiping roller 210 is parallel to the left and right direction. The outer wall of the second wiping roller 210 is used for the film to wind around, so that the outer wall of the second wiping roller 210 can be kept in contact with the upper surface of the film. The output end of the rotation driving mechanism is connected to the second wiping roller 210. The rotation driving mechanism can drive the second wiping roller 210 to rotate around its own axis, so that the second wiping roller 210 can play a role in pulling the film. The film is conveyed from the back to the front. The first wiping roller 110 and the second wiping roller 210 are arranged in sequence along the conveying direction of the film, that is, the second wiping roller 210 is located in front of the first wiping roller 110, and the second wiping roller 210 is located below the first wiping roller 110.

[0056] In the embodiment of the present invention, the spiral direction of the first spiral groove 211 is the same as that of the first spiral hole 111, and the spiral directions of the second spiral groove 212 and the second spiral hole 112, that is, the spiral directions of the first spiral groove 211 and the second spiral groove 212 are opposite. Refer to Figure 10 and Figure 11 , Figure 10 The two arrows in Figure 11 are the rotation directions of the first wiper roller 110 and the second wiper roller 210 respectively. Since the film is conveyed from back to front, and the first wiper roller 110 is in contact with the lower surface of the film, and the second wiper roller 210 is in contact with the upper surface of the film, the rotation directions of the first wiper roller 110 and the second wiper roller 210 are opposite, that is, the rotation drive mechanism can drive the second wiper roller 210 to rotate in the reverse direction of the first wiper roller 110. In the embodiment of the present invention, the rotation drive mechanism includes a first motor and a second motor. Both the first motor and the second motor are arranged on the frame 400, and the output ends of the first motor and the second motor are respectively connected to the first wiper roller 110 and the second wiper roller 210, so that the first motor and the second motor can respectively drive the first wiper roller 110 and the second wiper roller 210 to rotate in the reverse direction. The rotation drive mechanism is a common drive mechanism and will not be further described here.

[0057] Figure 11 The two solid arrows at the back in Figure 11 are the conveying directions of the first spiral hole 111 and the second spiral hole 112 respectively, and the two solid arrows at the front in

[0058] are the conveying directions of the first spiral groove 211 and the second spiral groove 212 respectively. Since the spiral direction of the first spiral groove 211 is the same as that of the first spiral hole 111, the spiral direction of the second spiral groove 212 is the same as that of the second spiral hole 112, and the rotation directions of the first wiper roller 110 and the second wiper roller 210 are opposite, the first spiral hole 111 and the second spiral hole 112 can simultaneously scrape and convey water towards the middle of the first wiper roller 110, the first spiral groove 211 can convey water from right to left, and the second spiral groove 212 can convey water from left to right, that is, the first spiral groove 211 and the second spiral groove 212 can respectively and simultaneously scrape and convey water towards the left and right ends of the second wiper roller 210.It can be understood that the outer wall of the second wiper roller 210 is used for winding the film, and the outer wall of the second wiper roller 210 is in contact with the upper surface of the film. The rotary drive mechanism drives the second wiper roller 210 to rotate about its own axis, so that the second wiper roller 210 can play a role in pulling the film. During the rotation of the second wiper roller 210, the first spiral groove 211 and the second spiral groove 212 rotate around the axis of the second wiper roller 210, so that the inner walls of the first spiral groove 211 and the second spiral groove 212 with opposite spiral directions can simultaneously scrape the water attached to the upper surface of the film inward, and a part of the film in contact with the outer wall of the second wiper roller 210 can block a part of the first spiral groove 211 and the second spiral groove 212 located below, so that a part of the first spiral groove 211 and the second spiral groove 212 located below can hold water, and then the water in a part of the first spiral groove 211 and the second spiral groove 212 located below can move along the spiral directions of the first spiral groove 211 and the second spiral groove 212 towards the left and right ends of the second wiper roller 210 respectively. Since the two water collecting sleeves 220 are respectively sleeved on the left and right ends of the second wiper roller 210, and there is a gap for water flow between the two water collecting sleeves 220 and the outer wall of the second wiper roller 210, the water flowing along the first spiral groove 211 and the second spiral groove 212 will gradually approach the water collecting sleeves 220 on the left and right sides during the flow process and finally flow into the two water collecting sleeves 220. Then the water in the two water collecting sleeves 220 will flow into the liquid collecting tank through two drain pipes 230 respectively to complete the scraping and collecting of a part of the water attached to the upper surface of the film. The second wiper mechanism 200 can pre-scrape and collect a part of the water attached to the film, that is, the second wiper mechanism 200 can further reduce the amount of water attached to the film entering the water absorption device, and further reduce the water absorption load of the subsequent water absorption device, so it is beneficial to improve the water removal effect of the water absorption device.

[0059] It should be noted that referring to Figure 1 and Figure 10 , the area where the film is in contact with the outer wall of the second wiper roller 210 is the covering area, and a part of the first spiral groove 211 and the second spiral groove 212 in the covering area are the part of the first spiral groove 211 and the second spiral groove 212 located below. Under the covering effect of the film, a part of the first spiral groove 211 and the second spiral groove 212 in the covering area can hold the water attached to the film, and a part of the first spiral groove 211 and the second spiral groove 212 in the covering area can scrape and convey the water towards the left and right ends of the second wiper roller 210 respectively. Here, the first spiral groove 211 is taken as an example. Under the conveyance of the first spiral groove 211, the water in the first spiral groove 211 moves towards the water collecting sleeve 220. During the movement of the water, the water will leave the film and fall into the water collecting sleeve 220 under its own gravity, so that the water collecting sleeve 220 can play a role in collecting the water.

[0060] In the embodiment of the present invention, two water-collecting sleeves 220 are respectively mounted on the left and right ends of the second wiper roller 210, and the area between the two water-collecting sleeves 220 is dedicated to the movement of the film, so that the two water-collecting sleeves 220 can limit the moving film and enable the two water-collecting sleeves 220 to fit tightly with both sides of the film in the width direction, thereby preventing water from leaking from between the water-collecting sleeves 220 and the film, thereby preventing water from contaminating the processing area. Figure 12 As an embodiment of the present invention, two water-collecting sleeves 220 are provided with water-retaining arc plates 221 on opposite sides thereof. Both water-retaining arc plates 221 are located below the second wiper roller 210. The gaps between the two water-retaining arc plates 221 and the outer wall of the second wiper roller 210 are used for movement of the film, so that water dripping from both sides of the film can fall on the two water-retaining arc plates 221 respectively, and the water on the two water-retaining arc plates 221 can flow into the two water-collecting sleeves 220 respectively. It is understandable that water dripping from both sides of the film in the width direction can accurately fall on the two water-retaining arc plates 221, and the water on the two water-retaining arc plates 221 can flow into the two water-collecting sleeves 220 respectively, thereby preventing water dripping from both sides of the film from polluting the processing environment. As an embodiment of the present invention, the upper surfaces of the two water-retaining arc plates 221 are provided with guide slopes, and the angle formed by the two guide slopes is downward, so that water can drip onto the two guide slopes, and then the water can flow into the two water collecting sleeves 220 respectively through the two guide slopes.

[0061] refer to Figure 7 and Figure 9, the positions of the two water collecting sleeves 220 in the left - right direction can be adjusted so that the distance between the two water collecting sleeves 220 can be adjusted. It can be understood that in different production requirements, the width of the film will be different. By adjusting the distance between the two water collecting sleeves 220, the two water collecting sleeves 220 can adapt to films of different width specifications, enabling the two water collecting sleeves 220 to smoothly collect the water attached to the film, thereby improving the versatility of the film pre - water scraping device. Specifically, the film pre - water scraping device further includes a bracket 300, two slide rails 310, two sliders 320, and two screw - nut driving mechanisms. The bracket 300 is arranged on the frame 400 and is located below the second water scraping roller 210. The two slide rails 310 are both parallel to the left - right direction and are arranged on the bracket 300. The two sliders 320 are respectively arranged on the two water collecting sleeves 220, and the two sliders 320 are respectively slidably connected to the two slide rails 310, enabling the two water collecting sleeves 220 to move in the left - right direction on the bracket 300, that is, enabling the distance between the two water collecting sleeves 220 to be adjusted. The two screw - nut driving mechanisms are both arranged on the frame 400, and the output ends of the two screw - nut driving mechanisms are respectively connected to the two water collecting sleeves 220. The two screw - nut driving mechanisms can respectively drive the two water collecting sleeves 220 to move in the left - right direction, thereby enabling the distance between the two water collecting sleeves 220 to be adjusted. The screw - nut driving mechanism is a common linear driving mechanism and will not be further elaborated here.

[0062] As an embodiment of the present invention, sealing rings are arranged on the opposite sides of the inner cavities of the two water collecting sleeves 220. The two sealing rings are both located between the two drain pipes 230. The inner walls of the two water collecting sleeves 220 are in contact with the outer wall of the second water scraping roller 210 through the sealing rings. The two sealing rings are respectively used to seal the gaps between the opposite sides of the two water collecting sleeves 220 and the outer wall of the second water scraping roller 210 to prevent the water in the two water collecting sleeves 220 from flowing out from the opposite sides of the two water collecting sleeves 220 respectively. In the embodiment of the present invention, the water pump includes a water pump, a return pipe, and three water suction pipes. One end of one water suction pipe penetrates through the installation pipe 130 and extends into the liquid collecting box 120. The other ends of the other two water suction pipes are respectively communicated with the lower ends of the two drain pipes 230. The other ends of the three water suction pipes are simultaneously communicated with one end of the return pipe, and the other end of the return pipe is communicated with the liquid collecting tank. The water pump is arranged on the return pipe. After the water pump is started, the water in the liquid collecting box 120 can be sucked into the liquid collecting tank by one of the water suction pipes, and negative pressures are formed in the gaps between the two water collecting sleeves 220 and the outer wall of the second water scraping roller 210, enabling the water in the two water collecting sleeves 220 to be respectively quickly sucked into the two drain pipes 230, and the water in the two drain pipes 230 can quickly flow into the liquid collecting tank.

[0063] The present invention also discloses a double-unwinding and double-winding coating production line, which includes two continuous coating devices, with one continuous coating device disposed above the other. Both continuous coating devices include an automatic unwinding device, a coating device, a coagulation box, a water absorption device, an oven, a deviation rectification device, an automatic winding device, and a film pre-water scraping device. The automatic unwinding device, the coating device, the coagulation box, the film pre-water scraping device, the water absorption device, the oven, the deviation rectification device, and the automatic winding device are arranged in sequence along the conveying path of the film. In the embodiment of the present invention, the double-unwinding and double-winding coating production line is a device for surface coating processing of substrates such as films and papers, and has two unwinding devices and two winding devices. Its working process generally is that the two unwinding devices respectively unwind the substrates, apply a layer of glue, coating, ink or the like with specific functions on the surface of the substrates through the coating device, then perform drying treatment through the drying device, and finally the two winding devices respectively wind up the coated and dried substrates into rolls. The double-unwinding and double-winding coating production line can achieve continuous production. Through the double-unwinding and double-winding and non-stop material feeding technologies, the production cycle is shortened, the production efficiency is improved, at the same time, the manual intervention and downtime are reduced, the operation cost of the equipment is lowered, and the errors and wastes caused by material replacement or adjustment are also reduced, which is beneficial to improving the quality of film products.

[0064] Specifically, the double-unwinding and double-winding coating production line includes two continuous coating devices that can independently perform spot coating processing on the film, so the coating efficiency of the film can be significantly improved. The film pre-water scraping device can reduce the water absorption load of the subsequent water absorption device, so it is beneficial to improve the water removal effect of the water absorption device, and further can ensure the quality of the film products processed by the continuous coating device. The automatic unwinding device, the coating device, the coagulation box, the water absorption device, the oven, the deviation rectification device, and the automatic winding device are all common devices in the coating technology field, and will not be further described here.

[0065] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0066] Certainly, the present invention is not limited to the above embodiments. Those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A thin film pre-wiper device, characterized in that, Comprising: A frame; A first wiper mechanism, including a first wiper roller and a liquid collecting box. The left and right ends of the first wiper roller are rotatably connected to the frame. A dripping cavity is formed inside the first wiper roller. A first spiral hole and a second spiral hole with opposite rotation directions are respectively provided on the left and right sides of the outer wall of the first wiper roller. The first spiral hole and the second spiral hole are both communicated with the dripping cavity. The outer wall of the first wiper roller is used for winding the film. The outer wall of the first wiper roller is kept in contact with the lower surface of the film. The liquid collecting box is arranged in the dripping cavity. The left and right ends of the liquid collecting box are respectively rotatably connected to the left and right inner side walls of the dripping cavity, so that the liquid collecting box remains stationary relative to the frame under its own gravity and the opening of the liquid collecting box remains upward; A rotation driving mechanism is arranged on the frame. The rotation driving mechanism is used to drive the first wiper roller to rotate. The inner walls of the first spiral hole and the second spiral hole can simultaneously scrape the water attached to the lower surface of the film, so that the water passes through the first spiral hole and the second spiral hole and drips into the liquid collecting box; A second wiper mechanism, including a liquid collecting tank, a second wiper roller, two water collecting sleeves and two drain pipes. The left and right ends of the second wiper roller are rotatably connected to the frame. The first wiper roller and the second wiper roller are arranged in sequence along the conveying direction of the film. The second wiper roller is located below the first wiper roller. A first spiral groove and a second spiral groove are respectively provided on the left and right sides of the outer wall of the second wiper roller. The rotation direction of the first spiral groove is the same as that of the first spiral hole, and the rotation direction of the second spiral groove is the same as that of the second spiral hole. The outer wall of the second wiper roller is used for winding the film. The outer wall of the second wiper roller is kept in contact with the upper surface of the film. The two water collecting sleeves are both arranged on the frame. The two water collecting sleeves are respectively sleeved on the left and right ends of the second wiper roller. A gap for water flow is left between the two water collecting sleeves and the outer wall of the second wiper roller. The area between the two water collecting sleeves is used for the film to move. The rotation driving mechanism can drive the second wiper roller to rotate, so that the inner walls of the first spiral groove and the second spiral groove can scrape the water attached to the upper surface of the film, and the water in the first spiral groove and the second spiral groove respectively flows into the two water collecting sleeves. The two drain pipes are respectively arranged at the lower ends of the two water collecting sleeves. The two drain pipes are respectively communicated with the two water collecting sleeves, so that the water in the two water collecting sleeves can respectively flow into the two drain pipes. The liquid collecting tank is arranged on the frame. The liquid collecting tank is communicated with the two drain pipes, so that the water in the two drain pipes can flow into the liquid collecting tank.

2. The thin film pre-wiping device according to claim 1, wherein: It further includes a water pumping mechanism which is arranged on the frame. The first wiper mechanism further includes a mounting pipe which is arranged at one end of the first wiper roller and communicated with the dripping cavity. The water pumping end of the water pumping mechanism passes through the mounting pipe and extends into the liquid collecting box, so that the water pumping mechanism can suck the water collected in the liquid collecting box.

3. The thin film pre-wiping device according to claim 1, wherein: The first wiper mechanism further includes a first magnetic attracting member and a second magnetic attracting member. The first magnetic attracting member is arranged at one end of the liquid collecting box, and the second magnetic attracting member is arranged on the frame. The first magnetic attracting member and the second magnetic attracting member are magnetically attracted to each other, so that the liquid collecting box remains stationary relative to the frame.

4. The thin film pre-wiping device according to claim 1, wherein: The first wiper mechanism further includes a splash-proof perforated plate which is arranged in the liquid collecting box, so that the water dripping from the first spiral hole and the second spiral hole can fall on the splash-proof perforated plate.

5. The thin-film pre-wiping device according to claim 1, characterized in that: On the opposite sides of the two water collecting sleeves, there are water blocking arc plates. Both of the two water blocking arc plates are located below the second wiper roller. The gaps between the two water blocking arc plates and the outer wall of the second wiper roller are used for the film to move, so that the water dripping from both sides of the film can respectively fall on the two water blocking arc plates, and the water on the two water blocking arc plates can respectively flow into the two water collecting sleeves.

6. The film pre-wiper device according to claim 1, characterized in that: The positions of the two water collecting sleeves in the left-right direction can be adjusted, so that the distance between the two water collecting sleeves can be adjusted.

7. The film pre-wiper device according to claim 6, characterized in that: It further includes a bracket, two slide rails, two sliders and two lead screw-nut driving mechanisms. The bracket is arranged on the frame. The bracket is located below the second wiper roller. The two slide rails are both parallel to the left-right direction and are arranged on the bracket. The two sliders are respectively arranged on the two water collecting sleeves. The two sliders are respectively slidably connected to the two slide rails. The two lead screw-nut driving mechanisms are both arranged on the frame. The output ends of the two lead screw-nut driving mechanisms are respectively connected to the two water collecting sleeves. The two lead screw-nut driving mechanisms can respectively drive the two water collecting sleeves to move in the left-right direction, so that the two water collecting sleeves approach or move away from each other, and the distance between the two water collecting sleeves can be adjusted.

8. Double-sided coating production line for double-sided coating and double-sided rewinding, characterized in that It includes two continuous coating devices. One of the continuous coating devices is arranged above the other continuous coating device. Both of the two continuous coating devices include an automatic unwinding device, a coating device, a solidification box, a water absorption device, an oven, a deviation rectifying device, an automatic winding device and the film pre-wiping device according to any one of claims 1 to 7. The automatic unwinding device, the coating device, the solidification box, the film pre-wiping device, the water absorption device, the oven, the deviation rectifying device and the automatic winding device are arranged in sequence along the conveying path of the film.

Images