Device for coating film surface with coating liquid

Abstract

The utility model discloses a device for coating a coating liquid on the surface of a film, which comprises a tensioning assembly for tensioning the film, a compression roller assembly, an anilox roller assembly and a containing groove provided with the coating liquid, the tensioning assembly is located on the upstream of the compression roller assembly, and the compression roller assembly comprises a base, a fixing plate, a sliding block, a compression roller installation seat, a compression roller, an upper support and a lifting driver. One end of the fixing plate is fixed to the base, the other end of the fixing plate is fixed to the upper support, the lifting driver is connected with the upper support, the sliding block is in sliding fit with the fixing plate, the pressing roller mounting base is fixed to the sliding block, the sliding block or the pressing roller mounting base is connected with the lifting driver, the pressing roller is connected with the pressing roller mounting base, and the pressing roller is located on the upstream of the anilox roller assembly. According to the utility model, a large wrap angle can be formed between the film and the anilox roller, and the amount of coating liquid obtained by the film from the surface of the anilox roller is increased.

Description

Technical Field

[0001] This utility model relates to membrane production equipment, specifically to a device for coating a coating liquid onto a membrane surface. Background Technology

[0002] MDO (Machine Direction Orientation) film is a technology that improves the stiffness, optical properties, and barrier properties of a film by increasing its orientation in the machine direction (MD direction) through a post-extrusion process. The main purpose of MDO film is to improve its flatness, tensile strength, and opening properties through a stretching-heat treatment-cooling process.

[0003] MDO film is widely used in various packaging materials, especially in recyclable flexible packaging. It simplifies the stretching process and allows for the production of two to three times more film products with the same amount of plastic. Due to its smooth properties, MDO film also speeds up downstream processing and increases added value.

[0004] In the production process of MDO film, one step is to coat the surface of the MDO film with a coating liquid. To achieve the coating liquid coating, corresponding rollers are needed to tension the MDO film. Then, the MDO film passes between the pressure roller assembly and the anilox roller assembly. The anilox roller assembly is in conjunction with a receiving tank containing coating liquid. When the anilox roller in the anilox roller assembly rotates and passes through the receiving tank, the coating liquid in the receiving tank adheres to the surface of the anilox roller. When the MDO film passes through the anilox roller, the coating liquid on the anilox roller adheres to the MDO film.

[0005] In the above structure, since the pressure roller in the pressure roller assembly is located directly above the anilox roller, the wrap angle formed between the MDO film and the anilox roller is constant when the MDO film passes through the anilox roller. This results in a small contact area between the MDO film and the anilox roller, which leads to a smaller amount of coating liquid obtained by the MDO film from the surface of the anilox roller, resulting in poor coating quality. Utility Model Content

[0006] This invention provides an apparatus for coating a coating liquid onto a membrane surface. This invention can enable the membrane to form a larger wrap angle with the anilox roller, thereby increasing the amount of coating liquid obtained by the membrane from the surface of the anilox roller.

[0007] The technical solution to achieve the above objectives is as follows:

[0008] An apparatus for applying a coating liquid to a membrane surface includes a tensioning assembly for tensioning the membrane, a pressure roller assembly, an anilox roller assembly, and a receiving tank containing the coating liquid. The tensioning assembly is located upstream of the pressure roller assembly. The pressure roller assembly includes a base, a fixed plate, a slider, a pressure roller mounting seat, a pressure roller, an upper support, and a lifting driver. One end of the fixed plate is fixed to the base, and the other end of the fixed plate is fixed to the upper support. The lifting driver is connected to the upper support. The slider is slidably engaged with the fixed plate. The pressure roller mounting seat is fixed to the slider. The slider or the pressure roller mounting seat is connected to the lifting driver. The pressure roller is connected to the pressure roller mounting seat. The pressure roller is located upstream of the anilox roller assembly.

[0009] Furthermore, the height of the lowest point of the pressure roller is not on the same straight line as the height of the highest point of the anilox roller in the anilox roller assembly.

[0010] Furthermore, the lifting drive is a servo electric cylinder.

[0011] Furthermore, the tensioning assembly includes a first guide roller, a second guide roller, a corona roller, and a third guide roller. The second guide roller is located above the first guide roller, the corona roller is located below the second guide roller, and the third guide roller is located above the corona roller and the pressure roller.

[0012] Furthermore, it also includes a flattening roller, which is located between the third guide roller and the pressure roller.

[0013] In this invention, since the pressure roller is located upstream of the anilox roller assembly and its height can be adjusted as needed, when the film passes sequentially from the lowest point of the pressure roller and the highest point of the anilox roller, a wrap angle is formed between the film and the anilox roller, increasing the contact area between the film and the anilox roller. Compared to the prior art where the pressure roller is directly above the anilox roller, this invention allows the film surface to obtain more coating liquid from the surface of the anilox roller, thereby improving the coating efficiency and quality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the membrane passing through the tensioning assembly, pressure roller assembly, and anilox roller assembly.

[0015] Figure 2 This is a structural diagram of the pressure roller assembly.

[0016] Labels in the attached diagram:

[0017] Anilox roller assembly 1, receiving groove 2, base 3, fixing plate 4, slider 5, pressure roller mounting seat 6, pressure roller 7, upper support 8, lifting driver 9, first guide roller 10, second guide roller 11, corona roller 12, third guide roller 13, flattening roller 14, support rod 15, limiting block 16, film A. Detailed Implementation

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] like Figures 1 to 2As shown, the device for coating liquid on a membrane surface according to this utility model includes a tensioning assembly for tensioning the membrane, a pressure roller assembly, an anilox roller assembly 1, and a receiving tank 2 containing the coating liquid. The tensioning assembly is located upstream of the pressure roller assembly. The pressure roller assembly includes a base 3, a fixing plate 4, a slider 5, a pressure roller mounting seat 6, a pressure roller 7, an upper support 8, and a lifting driver 9. One end of the fixing plate 4 is fixed to the base 3, and the other end of the fixing plate 4 is fixed to the upper support 8. The lifting driver 9 is connected to the upper support 8. The slider 5 is slidably engaged with the fixing plate 4. The fixing plate 4 is provided with a slide rail, and the slider 5 is slidably engaged with the slide rail. The pressure roller mounting seat 6 is fixed to the slider 5. The slider 5 or the pressure roller mounting seat 6 is connected to the lifting driver 9. The pressure roller 7 is connected to the pressure roller mounting seat 6 and is located upstream of the anilox roller assembly 1.

[0023] The height of the lowest point of the pressure roller 7 is not on the same straight line as the height of the highest point of the anilox roller in the anilox roller assembly 1. In this embodiment, preferably, the height of the lowest point of the pressure roller 7 is lower than the highest point of the anilox roller in the anilox roller assembly 1. The film A passes through the lowest point of the pressure roller 7 and the highest point of the anilox roller in sequence. In this way, a wrap angle is formed between the film A and the anilox roller, which increases the contact area between the film A and the anilox roller. Compared with the case where the pressure roller is located directly above the anilox roller in the prior art, this utility model is beneficial for the surface of the film A to obtain more coating liquid from the surface of the anilox roller.

[0024] In this embodiment, the two ends of the pressure roller 7 are respectively provided with a base 3, a fixing plate 4, a slider 5, a pressure roller mounting seat 6, an upper support 8, and a lifting driver 9. Therefore, there are two lifting drivers 9 that indirectly raise and lower the pressure roller 7. In this embodiment, the lifting driver 9 is preferably a servo electric cylinder. The servo electric cylinder is a modular product that integrates a servo motor and a lead screw. Because of the closed-loop servo control, the control accuracy is high. Therefore, when it is necessary to adjust the height of the pressure roller 7, both lifting drivers 9 are activated at the same time, so that the two ends of the pressure roller 7 are raised and lowered at the same time, avoiding the two ends of the pressure roller 7 not being at the same height position.

[0025] The pressure roller assembly also includes a limiting assembly, which includes a support rod 15 and a limiting block 16. One end of the support rod 15 is fixed to the fixing plate 4, and the other end of the support rod 15 is fixed to the limiting block 16. The limiting block 16 is used to limit the pressure roller mounting seat 6 from descending to the lowest position. The limiting block 16 is made of nylon.

[0026] The tensioning assembly includes a first guide roller 10, a second guide roller 11, a corona roller 12, and a third guide roller 13. The second guide roller 11 is located above the first guide roller 10, the corona roller 12 is located below the second guide roller 11, and the third guide roller 13 is located above the corona roller 12 and the pressure roller 7. The center of the first guide roller 10 is not on the same vertical line as the center of the second guide roller 11, the center of the second guide roller 11 is not on the same vertical line as the center of the corona roller 12, the center of the corona roller 12 is not on the same vertical line as the center of the third guide roller 13, and the center of the third guide roller 13 is not on the same vertical line as the center of the pressure roller 7.

[0027] This invention also includes a flattening roller 14, which is located between the third guide roller 13 and the pressure roller 7. The flattening roller 14 keeps the film A flat. The center of the flattening roller 14 is not on the same vertical line as the center of the third guide roller 13 and the center of the pressure roller 7.

[0028] The working process of this utility model is as follows: Membrane A is in accordance with... Figure 1 The path shown passes sequentially through the first guide roller 10, the second guide roller 11, the corona roller 12, the third guide roller 13, the flattening roller 14, the pressure roller 7, and the anilox roller assembly 1. As needed, the height of the pressure roller 7 is adjusted so that the film A and the anilox roller assembly 1 form the required wrap angle. During adjustment, the lifting driver 9 works, and the lifting driver 9 drives the slider 5 or the pressure roller mounting seat 6 to rise or fall along the guide rail on the fixed plate 4, thereby causing the pressure roller 7 to rise or fall to obtain the required wrap angle.

[0029] Finally, it should be noted that the above-described embodiments are merely preferred embodiments of the present invention used to illustrate the technical solutions of the present invention, and are not intended to limit them, much less limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of protection of the claims.

Claims

1. An apparatus for coating a coating liquid onto a membrane surface, comprising a tensioning assembly for tensioning the membrane, a pressure roller assembly, an anilox roller assembly (1), and a receiving tank (2) containing the coating liquid, wherein the tensioning assembly is located upstream of the pressure roller assembly, characterized in that, The pressure roller assembly includes a base (3), a fixing plate (4), a slider (5), a pressure roller mounting seat (6), a pressure roller (7), an upper support (8), and a lifting driver (9). One end of the fixing plate (4) is fixed to the base (3), and the other end of the fixing plate (4) is fixed to the upper support (8). The lifting driver (9) is connected to the upper support (8). The slider (5) is slidably engaged with the fixing plate (4). The pressure roller mounting seat (6) is fixed to the slider (5). The slider (5) or the pressure roller mounting seat (6) is connected to the lifting driver (9). The pressure roller (7) is connected to the pressure roller mounting seat (6). The pressure roller (7) is located upstream of the anilox roller assembly (1).

2. The apparatus for applying a coating liquid to a membrane surface according to claim 1, characterized in that, The height of the lowest point of the pressure roller (7) is not on the same straight line as the height of the highest point of the anilox roller in the anilox roller assembly (1).

3. The apparatus for applying a coating liquid to a membrane surface according to claim 1, characterized in that, The lifting driver (9) is a servo electric cylinder.

4. The apparatus for applying a coating liquid to a membrane surface according to claim 1, characterized in that, The tensioning assembly includes a first guide roller (10), a second guide roller (11), a corona roller (12), and a third guide roller (13). The second guide roller (11) is located above the first guide roller (10), the corona roller (12) is located below the second guide roller (11), and the third guide roller (13) is located above the corona roller (12) and the pressure roller (7).

5. The apparatus for applying a coating liquid to a membrane surface according to claim 3, characterized in that, It also includes a flattening roller (14), which is located between the third guide roller (13) and the pressure roller (7).

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