Film pre-water-scraping device and double-unwinding and double-winding coating production line

Abstract

The invention discloses a film pre-water-scraping device and discloses a double-unwinding and double-winding coating production line with the film pre-water-scraping device, and the film pre-water-scraping device comprises a rack, a first water-scraping mechanism and a rotary driving mechanism. The first water scraping mechanism comprises a first water scraping roller and a liquid collecting box, a dripping cavity is formed in the first water scraping roller, and a first spiral hole and a second spiral hole which are opposite in rotation direction are formed in the outer wall of the first water scraping roller; the liquid collecting box is arranged in the dripping cavity, and the left end and the right end of the liquid collecting box are rotationally connected to the left inner side wall and the right inner side wall of the dripping cavity correspondingly; and the rotary driving mechanism is arranged on the rack and used for driving the first water scraping roller to rotate, and the inner walls of the first spiral hole and the second spiral hole can inwards scrape water attached to the lower surface of the film at the same time, so that the water penetrates through the first spiral hole and the second spiral hole and drips into the liquid collecting box. According to the film water pre-scraping device, part of water attached to the film can be scraped and collected in advance, and the water removal effect of the water absorption device can be improved.

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 perform soaking water treatment on the film and the specific coating on the film to accelerate the solidification of the specific coating. The commonly used soaking water method is to set a solidification tank, in which water is stored. There are multiple driving rollers in the solidification tank, and 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 thus 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 at least solve 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 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 communicate with the dripping cavity. The outer wall of the first water scraping roller is for the film to be wound around. The outer wall of the first water scraping roller is in contact with the lower surface of the film. The liquid collecting box is arranged inside 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 faces upward. The rotary driving mechanism is arranged on the frame and 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: The outer wall of the first water scraping roller is for the film to be wound around, and the outer wall of the first water scraping roller is 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 inside 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.

[0007] 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 communicates 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.

[0008] According to the thin-film pre-wiping 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 collecting box, and the second magnetic attraction member is disposed on the frame. The first magnetic attraction member and the second magnetic attraction member magnetically attract each other to keep the liquid collecting box stationary relative to the frame.

[0009] According to the thin-film pre-wiping device of the first aspect embodiment of the present invention, the first wiper mechanism further includes a splash-proof porous plate. The splash-proof porous plate is disposed 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 porous plate.

[0010] The thin-film pre-wiping device according to the first aspect embodiment of the present invention further includes a second wiper mechanism for wiping the water attached to the upper surface of the thin film.

[0011] According to the thin-film pre-wiping device of the first aspect embodiment of the present invention, the second wiper mechanism includes a liquid collecting tank, a second wiper roller, two water collecting sleeves, and two drain pipes; 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 in contact with the upper surface of the thin film; Both of the two water collecting sleeves are disposed 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 to 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 for the thin 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 thin film and make the water in the first spiral groove and the second spiral groove flow into the two water collecting sleeves respectively; The two drain pipes are respectively disposed 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 flow into the two drain pipes respectively; The liquid collecting tank is disposed 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.

[0012] According to the thin film pre - water scraping device of the first - aspect embodiment of the present invention, water - blocking arc plates are provided on one side of each of the two water - collecting sleeves facing each other. Both of the two water - blocking arc plates are 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 thin film to move, so that the water dripping from both sides of the thin 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.

[0013] According to the thin film pre - water scraping device of 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.

[0014] According to the thin film pre - water scraping device of the first - aspect embodiment of the present invention, 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 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. 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.

[0015] According to the double - unwind and double - wind coating production line of the second - aspect embodiment of the present invention, 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 unwind device, a coating device, a coagulation box, a water - absorbing device, an oven, a deviation - rectifying device, an automatic winding device and the thin film pre - water scraping device of the above - mentioned first - aspect embodiment. The automatic unwind device, the coating device, the coagulation box, the thin film pre - water scraping device, the water - absorbing device, the oven, the deviation - rectifying device and the automatic winding device are arranged in sequence along the conveying path of the thin film.

[0016] It has at least the following beneficial effects: This double - unwind and double - wind coating production line has all the beneficial effects brought by the above - mentioned thin film pre - water scraping device, and no repeated description will be made here.

[0017] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following further describes the present invention in conjunction with the drawings and embodiments, where: Figure 1 It is a schematic diagram of the film running structure of the film pre-wiping device in an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of the film pre-wiping device; Figure 3 It is a schematic diagram of the structure of the first wiping mechanism in the film pre-wiping device; Figure 4 It is Figure 3 The partial enlarged view at position A in Figure 5 It is a schematic diagram of the internal structure of the first wiping roller in the film pre-wiping device; Figure 6 It is a schematic diagram of the structure of the liquid collecting box in the film pre-wiping device; Figure 7 It is a schematic diagram of the structure of the second wiping mechanism in the film pre-wiping device; Figure 8 It is Figure 7 The partial enlarged view at position B in Figure 9 It is a schematic diagram of the partial structure of the second wiping mechanism in the film pre-wiping device; Figure 10 It is a side view of the film running of the first wiping roller and the second wiping roller in the film pre-wiping device; Figure 11 It is a top view schematic diagram of the first wiping roller and the second wiping roller in the film pre-wiping device; Figure 12 It is a schematic diagram of the structure of the water collecting sleeve in another embodiment of the present invention; Reference numerals in the drawings: 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 installation pipe 130; The second wiping mechanism 200; the second wiping roller 210; the first spiral groove 211; the second spiral groove 212; the water collecting sleeve 220; the water blocking arc plate 221; the drain pipe 230; The bracket 300; the slide rail 310; the slider 320; The frame 400. Detailed implementation manners

[0019] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on 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, and thus should not be construed as a limitation to the present invention.

[0020] In the description of the present invention, if the first and the second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or the sequence of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0022] Reference Figures 1 to 5 , the present invention discloses a thin film pre-wiping device, which includes a frame 400, a first wiping mechanism 100, and a rotation driving mechanism (not shown in the figure).

[0023] The first wiping mechanism 100 includes a first wiping roller 110 and a liquid collecting box 120. Both the left and right ends of the first wiping roller 110 are rotatably connected to the frame 400. A dripping cavity 113 is formed inside the first wiping roller 110. First spiral holes 111 and second spiral holes 112 with opposite rotation directions are respectively provided on the left and right sides of the outer wall of the first wiping roller 110. Both the first spiral holes 111 and the second spiral holes 112 communicate with the dripping cavity 113. The outer wall of the first wiping roller 110 is for winding the thin film, and the outer wall of the first wiping roller 110 is in contact with the lower surface of the thin film. The liquid collecting box 120 is arranged inside the dripping cavity 113. Both the left and right ends of the liquid collecting box 120 are 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 faces upward; the rotation driving mechanism is arranged on the frame 400, and the rotation driving mechanism is used to drive the first wiping roller 110 to rotate. The inner walls of the first spiral holes 111 and the second spiral holes 112 can simultaneously scrape the water attached to the lower surface of the thin film inward, so that the water passes through the first spiral holes 111 and the second spiral holes 112 and drips into the liquid collecting box 120.

[0024] In the embodiment of the present invention, the thin film is conveyed from the back to the front. The first water scraping roller 110 is parallel to the left - right direction. The outer wall of the first water scraping roller 110 is for the thin film to wind around, so that the outer wall of the first water scraping roller 110 can be in contact with the lower surface of the thin film. The output end of the rotation driving mechanism is connected to the first water scraping roller 110. The rotation driving mechanism can drive the first water scraping roller 110 to rotate around its own axis, so that the first water scraping roller 110 can play a role in pulling the thin film. 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 in the first water scraping roller 110. Therefore, during the rotation of the first water scraping roller 110 and under the action of its own gravity, the first water scraping 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 remains upward. In the embodiment of the present invention, the opening of the liquid collecting box 120 always faces upward, and the bottom plate of the liquid collecting box 120 is an arc plate. A counterweight is provided at the lowest 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 water scraping roller 110 can remain stationary relative to the frame 400 during rotation and ensuring that the liquid collecting port (opening) of the liquid collecting box 120 remains upward.

[0025] 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 water scraping 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 thin film. Inward means towards the middle of the first water scraping roller 110. In the embodiment of the present invention, the thin film pre - water scraping device and the water absorption device are arranged in sequence along the conveying direction of the thin film, that is, the thin film first passes through the thin film pre - water scraping device and then enters the water absorption device.

[0026] It can be understood that the outer wall of the first wiper roller 110 is used for winding the film, and the outer wall of the first wiper roller 110 abuts against 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 towards 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 towards 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 machine 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 remains 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, thus completing the scraping and collection of part of the water attached to the lower surface of the film. This 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.

[0027] In the embodiment of the present invention, the bottom plate of the liquid collecting box 120 is an arc plate with a radian of 180°, and the arc plate is half of the pipe. The central axis of the pipe coincides with the axis of the first wiper roller 110, that is, the axis of the arc plate coincides with the axis of the first wiper roller 110. When the film is wound around the outer wall of the first wiper roller 110, the wrap angle between the film and the outer wall of the first wiper 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.

[0028] Reference Figure 5 and Figure 6, the film pre-wiper further includes a pumping mechanism (not shown in the figure). The pumping mechanism is disposed on the frame 400. The first wiper mechanism 100 further includes a mounting pipe 130. The mounting pipe 130 is disposed at one end of the first wiper 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 suck 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 wiper roller 110, and the mounting pipe 130 can rotate following the first wiper roller 110. The mounting pipe 130 communicates with the dripping cavity 113 in the first wiper 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 following the first wiper roller 110. Furthermore, the pumping mechanism can suck 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, and prevent the processing environment from being polluted. The pumping mechanism is a common suction mechanism and will not be further described here.

[0029] In the embodiment of the present invention, the first wiper mechanism 100 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 collecting box 120, and the second magnetic attraction member is disposed on the frame 400. The first magnetic attraction member and the second magnetic attraction member are magnetically attracted to each other, 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 attraction member and the second magnetic attraction member, the liquid collecting box 120 can be stably held at 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 wiper roller 110, ensuring that the opening of the liquid collecting box 120 is always upward. Furthermore, the liquid collecting box 120 can accurately collect the water entering the dripping cavity 113. In the embodiment of the present invention, both the first magnetic attraction member and the second magnetic attraction member can be magnets that can be magnetically attracted to each other and will not be further described here.

[0030] Reference Figure 1 , Figures 7 to 11 , the film pre-wiper further includes a second wiper mechanism 200. The second wiper mechanism 200 is used to scrape the water attached to the upper surface of the film. The second wiper mechanism 200 includes a liquid collecting tank (not shown in the figure), a second wiper roller 210, two water collecting sleeves 220, and two drain pipes 230.

[0031] Both the left and right ends of the second wiper roller 210 are rotatably connected to the frame 400. The first wiper roller 110 and the second wiper roller 210 are arranged in sequence along the conveying direction of the film. The second wiper roller 210 is located below the first wiper roller 110. On the left and right sides of the outer wall of the second wiper 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 wiper roller 210 is for the film to be wound around, and the outer wall of the second wiper roller 210 is kept in contact with the upper surface of the film; both water collecting sleeves 220 are arranged on the frame 400. The two water collecting sleeves 220 are respectively sleeved on the left and right ends of the second wiper roller 210. A gap for water to flow is left between the two water collecting sleeves 220 and the outer wall of the second wiper roller 210. The area between the two water collecting sleeves 220 is for the film to move; the rotation driving mechanism can drive the second wiper 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 attached to the upper surface of the film, and the water in the first spiral groove 211 and the second spiral groove 212 respectively flows into the two water collecting sleeves 220; two drain pipes 230 are respectively arranged at the lower ends of the two water collecting sleeves 220. 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; a liquid collecting tank is arranged on the frame 400. 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.

[0032] In an embodiment of the present invention, the second wiper roller 210 is parallel to the left - right direction. The outer wall of the second wiper roller 210 is for the film to be wound around, so that the outer wall of the second wiper 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 wiper roller 210. The rotation driving mechanism can drive the second wiper roller 210 to rotate around its own axis, so that the second wiper roller 210 can play a role in pulling the film. The film is conveyed from back to front. The first wiper roller 110 and the second wiper roller 210 are arranged in sequence along the conveying direction of the film, that is, the second wiper roller 210 is located in front of the first wiper roller 110 and the second wiper roller 210 is located below the first wiper roller 110.

[0033] In an 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 for 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 11The two dashed arrows therein are respectively the rotation directions of the first wiper roller 110 and the second wiper roller 210. 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. The first motor and the second motor are both 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 opposite directions. The rotation drive mechanism is a common drive mechanism and will not be further described here.

[0034] Figure 11 The two solid arrows at the rear side therein are respectively the conveying directions of the first spiral hole 111 and the second spiral hole 112, Figure 11 The two solid arrows at the front side therein are respectively the conveying directions of the first spiral groove 211 and the second spiral groove 212. 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.

[0035] It is understandable 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 around 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 respectively flow into the liquid collecting tank through the two drain pipes 230 to complete the scraping and collection 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.

[0036] 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 action 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.

[0037] In an embodiment of the present invention, two water collecting sleeves 220 are respectively sleeved on the left and right ends of the second wiper roller 210, and the area between the two water collecting sleeves 220 is exclusively for the movement of the film, so that the two water collecting sleeves 220 can play a role in limiting the moving film, enabling the two water collecting sleeves 220 to closely cooperate with both sides in the width direction of the film respectively, avoiding water leakage between the water collecting sleeves 220 and the film, and thus avoiding water pollution in the processing area. Refer to Figure 12 , as an embodiment of the present invention, water retaining arc plates 221 are provided on the opposite sides of the two water collecting sleeves 220. Both of the two 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 the movement of the film, so that the water dripping from both sides of the film can respectively fall on the two water retaining arc plates 221, and the water on the two water retaining arc plates 221 can respectively flow into the two water collecting sleeves 220. It can be understood that the water dripping from both sides in the width direction of the film can accurately fall on the two water retaining arc plates 221, and the water on the two water retaining arc plates 221 can respectively flow into the two water collecting sleeves 220, thus preventing the water dripping from both sides of the film from polluting the processing environment. As an embodiment of the present invention, guide slopes are provided on the upper surfaces of the two water retaining arc plates 221. The included angle formed by the two guide slopes faces downward, and the water can fall on the two guide slopes, so that the water can respectively flow into the two water collecting sleeves 220 through the two guide slopes.

[0038] 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 the bracket 300 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 along 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 along 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.

[0039] 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 quickly sucked into the two drain pipes 230 respectively, and the water in the two drain pipes 230 can quickly flow into the liquid collecting tank.

[0040] The present invention also discloses a double-unwinding and double-winding coating production line, which includes two continuous coating devices, one of the continuous coating devices is arranged above the other continuous coating device. 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 is generally that the two unwinding devices respectively unwind the substrates, apply a layer of glue, coating, ink, etc. 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 the coated and dried substrates into rolls. The double-unwinding and double-winding coating production line can realize 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 reduced, and the errors and wastes caused by material replacement or adjustment are also reduced, which is beneficial to improving the quality of film products.

[0041] 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.

[0042] 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-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0043] Certainly, the present invention is not limited to the above-described 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 in the scope defined by the claims of this application.

Claims

1. A thin film pre-wiping device, characterized in that: include: frame; The first wiper mechanism comprises a first wiper roller and a liquid collecting box, the left and right ends of the first wiper roller are both rotatably connected to the frame, a dripping cavity is formed in the first wiper roller, the left and right sides of the outer wall of the first wiper roller are respectively provided with a first spiral hole and a second spiral hole with opposite rotation directions, the first spiral hole and the second spiral hole are both connected to the dripping cavity, the outer wall of the first wiper roller is used for winding a film, the outer wall of the first wiper roller is kept against 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 remains facing upward; A rotary drive mechanism is arranged on the frame, and 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 inward, so that the water passes through the first spiral hole and the second spiral hole and drips into the liquid collection box.

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

3. The thin film pre-wiping device according to claim 1, characterized in that: The first wiper mechanism also includes a first magnetic component and a second magnetic component, the first magnetic component is arranged on one end of the liquid collection box, and the second magnetic component is arranged on the frame, and the first magnetic component and the second magnetic component are magnetically attracted to each other to keep the liquid collection box stationary relative to the frame.

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

5. The thin film pre-wiping device according to claim 1, characterized in that: It also includes a second wiper mechanism, which is used to wipe off water attached to the upper surface of the film.

6. The thin film pre-wiping device according to claim 5, characterized in that: The second wiper mechanism comprises a liquid collecting tank, a second wiper roller, two water collecting sleeves and two drainage 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 sequentially arranged along the conveying direction of the film, the second wiper roller is located below the first wiper roller, the left and right sides of the outer wall of the second wiper roller are respectively provided with a first spiral groove and a second spiral groove, the rotation direction of the first spiral groove is the same as that of the first spiral hole, 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, and the outer wall of the second wiper roller is kept against the upper surface of the film; The two water-collecting sleeves are both arranged on the frame, and the two water-collecting sleeves are respectively sleeved on the left and right ends of the second wiper roller, and a gap for water flow is left between the two water-collecting sleeves and the outer wall of the second wiper roller, and the area between the two water-collecting sleeves is used for the movement of the film; The rotary drive 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 make the water in the first spiral groove and the second spiral groove flow into the two water collecting sleeves respectively; The two drainage pipes are respectively arranged at the lower ends of the two water collecting sleeves, and the two drainage pipes are respectively communicated with the two water collecting sleeves, so that the water in the two water collecting sleeves can flow into the two drainage pipes respectively; The liquid collecting box is arranged on the frame, and the liquid collecting box is communicated with the two drainage pipes so that the water in the two drainage pipes can flow into the liquid collecting box.

7. The thin film pre-wiping device according to claim 6, characterized in that: A water retaining arc plate is provided on the opposite side of the two water collecting sleeves, and the two water retaining arc plates are located below the second wiper roller. The gaps between the two water retaining arc plates and the outer wall of the second wiper roller are used for the movement of the film, so that water dripping from both sides of the film can fall on the two water retaining arc plates respectively, and the water on the two water retaining arc plates can flow into the two water collecting sleeves respectively.

8. The thin film pre-wiping device according to claim 6, 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.

9. The thin film pre-wiping device according to claim 8, characterized in that: It also includes a bracket, two slide rails, two sliders and two 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 parallel to the left and right directions 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 screw-nut driving mechanisms are both arranged on the frame, the output ends of the two screw-nut driving mechanisms are respectively connected to the two water-collecting sleeves, the two screw-nut driving mechanisms can respectively drive the two water-collecting sleeves to move in the left and right directions, so that the two water-collecting sleeves are close to or away from each other, and the distance between the two water-collecting sleeves can be adjusted.

10. Double-release and double-receive coating production line, characterized in that: The invention comprises two continuous coating devices, wherein one of the continuous coating devices is arranged above the other continuous coating device, and both of the two continuous coating devices comprise an automatic unwinding device, a coating device, a solidification box, a water absorption device, an oven, a deviation correction device, an automatic winding device, and a film pre-wiping device as described in any one of claims 5 to 9, wherein the automatic unwinding device, the coating device, the solidification box, the film pre-wiping device, the water absorption device, the oven, the deviation correction device, and the automatic winding device are arranged in sequence along the conveying path of the film.

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