Water washing device and its coating system

Abstract

This utility model relates to the field of electroplating equipment technology and discloses a water washing device and its coating system, including: a housing; multiple water washing tanks disposed in the housing; multiple first conveying rollers disposed above the water washing tanks; and a spray system including multiple spray pipes disposed on one side of the first conveying rollers, with multiple spray nozzles opened on the side of the spray pipes, the spray nozzles pointing towards the roller surface of the first conveying rollers. This utility model can ensure the smoothness of the roller surface of the first conveying rollers, thereby avoiding wear on the surface of the coating material.

Description

Technical Field

[0001] This utility model relates to the field of electroplating equipment technology, specifically to a water washing device and its coating system. Background Technology

[0002] In the coating process of thin film materials (such as optical films, release films, and packaging films), water washing is a crucial step before electroplating. After undergoing previous processes such as coating and curing, the surface of the film often retains contaminants such as unreacted monomers, low molecular weight precipitates, and dust particles. If these residues are not thoroughly removed, they will seriously affect subsequent processing of the film (such as lamination, printing, and coating) and the performance of the final product (such as light transmittance, adhesion strength, and appearance quality). To ensure the thoroughness and efficiency of water washing, multi-roller conveyor washing devices are commonly used in existing technologies. In such devices, the film material passes sequentially around multiple conveyor rollers arranged in a specific layout, thus forming a winding transport path within the washing tank.

[0003] However, existing multi-roller conveyor washing devices still face a problem: the surface of the conveyor rollers is not completely smooth, and several small pits will form on the surface. When the membrane material passes around multiple conveyor rollers and is transported by the conveyor rollers, the small pits on the surface of the conveyor rollers will affect the surface of the membrane material. In severe cases, these small pits will scratch the surface of the membrane material. Utility Model Content

[0004] In view of this, the present invention provides a water washing device and its coating system to solve the problem of wear on the surface of the film material during the conveying process of the conveying roller.

[0005] In a first aspect, this utility model provides a water washing device, comprising: shell; Multiple water washing tanks are disposed within the outer casing; Multiple first conveyor rollers are disposed above the washing tank; The jetting system includes multiple jetting pipes, which are disposed on one side of the first conveying roller. Multiple jetting nozzles are opened on the side of the jetting pipes, and the jetting nozzles point towards the roller surface of the first conveying roller.

[0006] Beneficial effects: Water is sprayed onto the surface of the first conveyor roller through the nozzles of the spray system, causing the water to adhere to the roller surface. This water fills the small pits on the roller surface, and due to the tension, a water film is formed at the opening of the pits, preventing the water from spilling out of the pits due to the rotation of the first conveyor roller. This stably fills the small pits on the surface of the first conveyor roller, ensuring the smoothness of the roller surface when the membrane material passes around multiple first conveyor rollers and is transported by the conveyor rollers, thereby avoiding wear on the surface of the membrane material.

[0007] In one optional embodiment, the jet system further includes multiple water inlet pipes and multiple water washing pipes, one end of each water inlet pipe being connected to both the water washing pipes and the jet pipes, and the water washing pipes being disposed in the water washing tank.

[0008] Beneficial effects: The water flow input from the inlet pipe is delivered to the spray pipe and the washing pipe respectively. At the same time, water is sprayed onto the surface of the first conveying roller through the spray pipe to fill the pits, and water is injected into the washing tank through the washing pipe to wash the membrane material in the washing tank. This reduces the wear on the membrane material surface and washes the membrane material.

[0009] In one alternative embodiment, the diameter of the jet pipe is smaller than the diameter of the water washing pipe.

[0010] Beneficial effects: The diameter of the spray pipe is smaller than that of the water washing pipe, which allows the water pressure in the spray pipe to be maintained at a low level. This ensures that the water in the spray pipe does not splash too much when it hits the surface of the first conveyor roller after being sprayed from the spray nozzle. This allows the water sprayed from the spray nozzle to fully and easily adhere to the surface of the first conveyor roller, thus filling the pits on the roller surface.

[0011] In one optional embodiment, the washing device further includes a plurality of second conveying rollers disposed within the washing tank; The plurality of said washing tanks are connected side by side, and the height of the plurality of said washing tanks decreases gradually from one end to the other along their side-by-side direction.

[0012] Beneficial effects: The second conveyor roller is always submerged in the water in the washing tank, so the second conveyor roller will not cause wear on the surface of the membrane material; the height of multiple washing tanks decreases stepwise from one end to the other along their parallel direction to form a stepped structure. When the water level of the highest washing tank reaches its limit, water overflows from it and flows into the adjacent washing tank, and so on, until the overflowing water flows into the lowest washing tank, and then the water is circulated to the water inlet pipe to complete the circulation.

[0013] In one alternative embodiment, the axis of the first conveying roller is parallel to the axis of the second conveying roller; Each of the washing tanks is also provided with a drain outlet, which is connected to the other end of the corresponding water inlet pipe.

[0014] Beneficial effects: The axes of the first and second conveying rollers are parallel, which allows multiple first and second conveying rollers to form a serpentine film material conveying trajectory; and when the entire washing process is completed, the water inside the washing tank is drained through the drain outlets opened in each washing tank, making drainage convenient and quick.

[0015] In one alternative embodiment, the washing device further includes a plurality of liquid level indicators disposed on one side of the washing tank.

[0016] Beneficial effects: The liquid level indicator allows operators to intuitively understand the liquid level in each washing tank, thereby enabling them to monitor in real time whether the water in the washing tank needs to be replenished and control the opening and closing of the water inlet pipe according to the above conditions.

[0017] In one alternative embodiment, a jet support for fixing the jet pipe is provided between the jet pipe and the housing.

[0018] Beneficial effects: The simple structure of the jet support ensures that the jet pipe is stably installed on the outer shell and does not interfere with the movement of the conveyor roller, thus not affecting the normal conveying of the membrane material.

[0019] In one alternative embodiment, the jet system further includes a diverter pipe disposed between the washing pipe and the jet pipe.

[0020] Beneficial effects: The diversion pipe is used to ensure that the water delivered from the inlet pipe can be simultaneously distributed to the washing pipe and the spray pipe, thereby simultaneously completing the washing of the membrane material and the spraying of water onto the surface of the first conveying roller.

[0021] In one alternative embodiment, the jet pipe is disposed obliquely below the first conveying roller; The nozzle is opened at an angle of 5°-30° to the horizontal plane.

[0022] Beneficial effects: Since the spray pipe is located diagonally below the first conveyor roller, and the spray nozzle is opened diagonally upwards, forming an angle of 5°-30° with the horizontal plane, it can ensure that the spray nozzle sprays water onto the roller surface of the first conveyor roller, rather than spraying it onto the membrane material in contact with the first conveyor roller, thereby avoiding wrinkles caused by water spraying on the membrane material.

[0023] Secondly, this utility model also provides a coating system, including the aforementioned water washing device.

[0024] Beneficial effects: In the entire coating system, the water washing device provided by this utility model can ensure that the film material is fully washed while filling the pits on the surface of the first conveying roller through the tension of water, avoiding wear on the surface of the film material, and providing a smooth film material for other processing steps downstream of the water washing device in the coating system, which helps to improve the coating accuracy of the entire coating system. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a water washing device according to an embodiment of the present utility model; Figure 2 for Figure 1 A magnified view of part A in the diagram; Figure 3 This is a top view of a water washing device according to an embodiment of the present utility model; Figure 4 for Figure 4 A cross-sectional view along the BB direction; Figure 5 This is a structural schematic diagram of a water washing device according to another embodiment of the present utility model; Figure 6 This is a schematic diagram of the washing tank and internal structure of a washing device according to an embodiment of the present utility model; Figure 7 for Figure 1 A schematic diagram of the structure behind the adjacent two side plates of the hidden shell; Figure 8 for Figure 7 A magnified view of part of C; Figure 9 This is a schematic diagram showing the orientation of the membrane material in a water washing device according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures: 1. Outer shell; 2. Washing tank; 3. First conveying roller; 4. Spray pipe; 5. Second conveying roller; 6. Spray nozzle; 7. Water inlet pipe; 8. Washing pipe; 9. Drain outlet; 10. Liquid level indicator; 11. Spray support; 12. Diverter pipe. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] In the manufacturing process of high-end thin film materials (such as optical films and release films), the pre-coating water washing process is crucial to ensuring the quality of the final product. After previous coating and curing treatments, the surface of the film often retains unreacted monomers, precipitates, and dust. Incomplete cleaning will directly damage key properties of the film, such as light transmittance and adhesion strength. Therefore, related technologies commonly employ multi-roller conveyor washing schemes, where the film material meanders around multiple conveyor rollers in the washing tank, extending its immersion and stretching time to ensure thorough cleaning. However, this design, intended to improve cleaning effectiveness, introduces new risks due to the inherent defects of its core component—the conveyor rollers: Over long-term use, the surface of the conveyor rollers inevitably develops microscopic pits, scratches, and other imperfections. When the delicate film material continuously rubs and contacts these roller surfaces with microscopic defects under tension, scratches or indentations are easily generated, leading to a decrease in product yield. This contradiction of "ensuring cleaning effectiveness while damaging the film material itself" has become a major technical bottleneck restricting the production of high-surface-quality film materials.

[0030] The following is combined Figures 1 to 9 The following describes embodiments of the present invention.

[0031] See Figures 1 to 8 The first embodiment of this utility model provides a water washing device, including a housing 1, which is typically made of stainless steel or a corrosion-resistant alloy material, and is used to support and house all internal components. Inside the housing 1, along the direction of membrane travel (e.g. Figure 9 Multiple washing tanks 2 are arranged sequentially (as indicated by the middle arrow). These washing tanks 2 are used to hold water and soak and clean the membrane material.

[0032] This embodiment includes three washing tanks 2. A first conveying roller 3 and a second conveying roller 5 are respectively arranged above and inside each washing tank 2. The number of first conveying rollers 3 and second conveying rollers 5 is several. In this embodiment, as shown... Figure 4 and Figure 9As shown, the system includes four first conveying rollers 3 positioned above the washing tank 2, and three second conveying rollers 5 positioned inside the washing tank 2. The first conveying rollers 3 and the second conveying rollers 5 are rotatably mounted on the outer casing 1 via bearing seats (not shown) and are synchronously driven by an external drive motor (not shown). The membrane material passes around these first conveying rollers 3 and second conveying rollers 5 in a serpentine path, thereby being fully unfolded and conveyed forward.

[0033] The core of this embodiment lies in the introduction of a jetting system. This jetting system includes a jetting pipe 4 disposed on one side of each first conveying roller 3. It should be noted that the jetting pipe 4 is disposed on the side of the first conveying roller 3 that does not contact the film material, and the axis of the jetting pipe 4 is parallel to the axis of the first conveying roller 3. Multiple jetting nozzles 6 are evenly distributed along the length of the side of the jetting pipe 4. The opening direction of these jetting nozzles 6 is precisely set to point towards the cylindrical roller surface of the first conveying roller 3.

[0034] Its anti-wear working principle is as follows: After water is pumped into the spray pipe 4, it is continuously and stably sprayed out from each spray nozzle 6, forming multiple fine water columns that precisely hit the roller surface of the corresponding first conveyor roller 3. These water streams spread out on the roller surface and, by virtue of the surface tension and adhesion of the liquid, fill and cover all existing microscopic pits, scratches, and other defects on the roller surface. Even when the first conveyor roller 3 rotates at high speed, due to the tension, the liquid filled in the pits is not easily thrown out, thus forming a dynamic and stable "water lubrication layer" on the roller surface. When the membrane material passes over this moist and smooth roller surface, it actually comes into contact with the water film on it, rather than directly rubbing against the hard metal roller surface, thereby fundamentally avoiding scratches and wear caused by hard contact.

[0035] Furthermore, the second conveying roller 5 is always positioned in the washing tank 2. In other words, during the operation of this embodiment, the second conveying roller 5 is always submerged in the water inside the washing tank 2, thereby avoiding wear on the surface of the membrane material when it is conveyed in conjunction with the first conveying roller 3.

[0036] See Figure 1 , Figure 6 and Figure 7 The second embodiment of this utility model further refines the jet system, integrating water supply and cleaning functions.

[0037] The jet system also includes an inlet pipe 7 and a wash pipe 8. The inlet pipe 7 serves as the main water supply line, with one end connected to an external water pump and filtration system (not shown in the figure). The other end of the inlet pipe 7 is connected to both the wash pipe 8 and the jet pipe 4.

[0038] The washing pipe 8 is located at the bottom or lower side wall of the washing tank 2. Several water outlets are formed on the pipe to evenly inject water into the washing tank 2, ensuring continuous replenishment of the liquid and preventing contaminants from overflowing. Simultaneously, a portion of the water flow is diverted to the spray pipe 4 to perform the aforementioned roller surface wetting function.

[0039] Furthermore, the diameter of the spray pipe 4 is smaller than that of the washing pipe 8. This design ensures that the water pressure in the main water circuit remains normal at the washing pipe 8 to meet the demand for high-flow water injection. When the water flows into the smaller diameter spray pipe 4, the flow velocity inside the pipe increases due to the reduced flow cross-sectional area. However, due to the increased pipe resistance and the larger number of outlets (spray nozzles 6), the pressure of the ejected water column remains at a moderate, non-impact level. This ensures that the water can fully adhere to the roller surface without causing violent splashing, saving water and preventing high-pressure water mist from interfering with the stable operation of the membrane material.

[0040] See Figure 4 In the second embodiment of this utility model, the three washing tanks 2 are arranged in a side-by-side connection, and their heights are not the same, but decrease gradually from one end to the other along their side-by-side direction, thus forming a clear stepped structure.

[0041] Specifically, the first water washing tank 2, located at the water inlet, is the tallest. The heights of subsequent second and third water washing tanks 2 decrease sequentially. All three water washing tanks 2 have corresponding overflow ports (not shown in the figure), which are existing technology and will not be elaborated upon here. During operation, water supplied by the spray system is first injected into the tallest first water washing tank 2. When the liquid level in the first water washing tank 2 exceeds its overflow port, the excess water naturally overflows into the adjacent, slightly shorter second water washing tank 2. This process continues, with water flowing through all the water washing tanks 2 in sequence, finally exiting from the lowest water washing tank 2 or entering the circulation system. This circulating cleaning method significantly improves cleaning efficiency and water economy.

[0042] In addition, see Figure 5 Each washing tank 2 has a drain outlet 9 at its lowest point. The drain outlet 9 is connected to the other end of the corresponding water inlet pipe 7 via a pipe, or to a centralized circulation processing unit (not shown in the figure). This allows for the circulation, filtration, and reuse of the cleaning solution in continuous production mode. When the entire washing process is complete and equipment maintenance is required, simply opening the drain valve allows the liquid in each washing tank 2 to be quickly and thoroughly drained through these drain outlets 9.

[0043] like Figure 1 , Figure 3 and Figure 6As shown, a liquid level indicator 10 is installed on the outer side wall of each washing tank 2. This liquid level indicator 10 includes, but is not limited to, a glass tube level gauge, with its upper and lower ends connected to the interior of the washing tank 2 via valves. Operators can visually observe the real-time liquid level in each washing tank 2, thereby adjusting the opening of the inlet valve in a timely manner to ensure the liquid level is always maintained within the optimal operating range.

[0044] Furthermore, to ensure the accuracy and stability of the relative position between the nozzle 6 and the first conveying roller 3, a nozzle support 11 for fixing the nozzle 4 is provided between the nozzle 4 and the outer casing 1. This nozzle support 11 can be made of L-shaped or U-shaped sheet metal, with one end fastened to the beam of the outer casing 1 by screws, and the other end clamped to the nozzle 4 by a pipe clamp. This structure is simple and reliable, and will not interfere with the rotation of the first conveying roller 3 or the conveying path of the film material.

[0045] Furthermore, to ensure a smooth and even distribution of water flow to the washing pipe 8 and the spray pipe 4, a diversion pipe 12 is installed between them. This diversion pipe 12 can be a separate tubular distributor with two outlets, or it can be directly integrated into the inlet branch pipe. Its function is to optimize the flow path, reduce turbulence, and ensure that the two water supply lines do not interfere with each other.

[0046] Further, see Figure 9 The jet pipe 4 is positioned diagonally below the first conveying roller 3. Meanwhile, the jet nozzle 6 is not horizontal, but rather angled upwards, with its centerline forming an angle α with the horizontal plane. Extensive experimental verification has shown that the optimal range for this angle α is between 5° and 30°.

[0047] Optionally, the value of α is any one of 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, and 30°, or a value between any two values.

[0048] The angle α ensures that the water jet from the nozzle 6 covers the surface of the first conveying roller 3 at a suitable tangential angle, while completely avoiding the membrane material running on the roller surface. This prevents the water jet from directly impacting the membrane surface, thus preventing wrinkles, shaking, or water stains caused by uneven stress, and ensuring the smoothness of membrane material transport and product quality.

[0049] The third embodiment of this utility model provides a coating system, which includes, but is not limited to, an unwinding mechanism, a coating mechanism, a curing oven, a water washing device as described in the previous embodiment, a drying oven, an electroplating or vacuum coating mechanism, and a winding mechanism arranged in sequence.

[0050] In this coating system, the water washing device of this invention is located at a critical station. It ensures that the surface of the film material entering the subsequent precision coating process is not only thoroughly cleaned of contaminants but also remains intact, free from scratches and wear caused by the transport process. This provides a crucial guarantee for obtaining high-performance, high-yield coated products, enhancing the overall process level and product competitiveness of the coating system.

[0051] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A water washing device, characterized in that, include: Outer shell (1); Multiple water washing tanks (2) are disposed in the outer casing (1); Multiple first conveying rollers (3) are disposed above the washing tank (2); The jetting system includes multiple jetting pipes (4), which are disposed on one side of the first conveying roller (3). Multiple jetting ports (6) are opened on the side of the jetting pipes (4), and the jetting ports (6) point to the roller surface of the first conveying roller (3).

2. The water washing device according to claim 1, characterized in that, The jet system also includes multiple water inlet pipes (7) and multiple water washing pipes (8). One end of the water inlet pipe (7) is connected to both the water washing pipe (8) and the jet pipe (4). The water washing pipe (8) is located in the water washing tank (2).

3. The water washing device according to claim 2, characterized in that, The diameter of the jet pipe (4) is smaller than the diameter of the water washing pipe (8).

4. The water washing device according to claim 3, characterized in that, The washing device also includes a plurality of second conveying rollers, which are disposed inside the washing tank; The multiple washing tanks (2) are connected side by side, and the height of the multiple washing tanks (2) decreases gradually from one end to the other along their side-by-side direction.

5. The water washing device according to claim 4, characterized in that, The axis of the first conveying roller (3) is parallel to the axis of the second conveying roller; Each of the washing tanks (2) is also provided with a drain outlet (9), which is connected to the other end of the corresponding water inlet pipe (7).

6. The water washing device according to claim 1, characterized in that, The washing device also includes a plurality of liquid level indicators (10), which are disposed on one side of the washing tank (2).

7. The water washing device according to claim 1, characterized in that, A jet support (11) for fixing the jet pipe (4) is provided between the jet pipe (4) and the outer shell (1).

8. The water washing device according to claim 2, characterized in that, The jet system also includes a split pipe (12), which is disposed between the washing pipe (8) and the jet pipe (4).

9. The water washing device according to claim 1, characterized in that, The jet pipe (4) is located diagonally below the first conveying roller (3); The opening direction of the jet nozzle (6) is obliquely upward relative to the horizontal plane, and forms an angle of 5°-30° with the horizontal plane.

10. A coating system, characterized in that, Includes the water washing device as described in any one of claims 1-9.

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