A uniform coating device for reverse osmosis membrane non-woven fabric production

Abstract

This utility model discloses a uniform coating device for the production of nonwoven fabrics for reverse osmosis membranes. It includes a support frame, a first guide roller mounted on the left side of the support frame, a heating box fixedly mounted on the right side of the inner cavity of the support frame, a second guide roller mounted on the right side of the heating box and outside the support frame, and symmetrically arranged conveyor rollers mounted inside the support frame. This utility model achieves uniform coating of the material through a curved surface fit design between the limiting bracket and the coating roller, combined with an elastically adjustable clamping mechanism of a support spring and an adjusting screw. This ensures uniform coating thickness and high flatness on the nonwoven fabric surface, meeting industry standards. The adjusting screw can precisely control the downward pressure of the limiting bracket, adapting to coating materials of different viscosities and thicknesses. The coating roller's front clamping bracket is slidably mounted via a clamping bracket and a knob, facilitating quick disassembly and replacement of coating rollers with different textures, adapting to diverse coating processes.

Description

Technical Field

[0001] This utility model relates to the field of reverse osmosis membrane nonwoven fabric production technology, specifically a uniform coating device for the production of reverse osmosis membrane nonwoven fabric. Background Technology

[0002] Reverse osmosis membranes are generally made by dissolving polysulfone in an organic solution to form a membrane solution, which is then cast onto a single layer of nonwoven fabric using a casting machine to produce a high-strength reverse osmosis membrane. The nonwoven fabric used as the substrate for the reverse osmosis membrane must have excellent uniformity of fiber web distribution, good microporous structure, high tensile strength, low thermal shrinkage, suitable air permeability, no surface fuzzing, small deformation, and consistent thickness. However, the surface of the reverse osmosis membrane nonwoven fabric needs to be coated during the production process. Generally, due to the uneven thickness of the coating on the coating roller surface, errors will occur during the coating process, and it is also impossible to coat the coating on the coating roller surface evenly, thus affecting the production efficiency of the reverse osmosis membrane nonwoven fabric. Utility Model Content

[0003] The purpose of this invention is to provide a uniform coating device for the production of nonwoven fabrics for reverse osmosis membranes, which has the advantage of being able to scrape the surface of the coating roller evenly and improve the coating uniformity.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a uniform coating device for the production of nonwoven fabric for reverse osmosis membranes, comprising a support frame, a first guide roller mounted on the left side of the support frame, a heating box fixedly mounted on the right side of the inner cavity of the support frame, a second guide roller mounted on the right side of the heating box and outside the support frame, conveying rollers symmetrically arranged inside the support frame, a front fixing plate and a rear fixing plate respectively mounted at the front and rear ends of the conveying rollers, the ends of the front fixing plate and the rear fixing plate being connected to the ends of the support frame, a coating roller mounted in the middle of the front fixing plate and the rear fixing plate, a drive motor fixedly mounted outside the rear fixing plate, and the output shaft of the drive motor being connected to the rear end of the coating roller, a limit seat fitted to the upper surface of the coating roller, support springs fixedly mounted on both sides of the top of the limit seat, an adjusting seat mounted on the upper end of the support spring, an adjusting screw threaded inside the adjusting seat, and the lower end of the adjusting screw being rotatably mounted to the top of the limit seat.

[0005] As a preferred embodiment, side baffles are installed on both sides of the bottom of the inner cavity of the support frame, and a collection box is pulled out between the two side baffles, with the collection box corresponding to the area directly below the coating roller and the conveying roller.

[0006] As a preferred embodiment, a fixed seat is fixedly installed on the top of the adjusting seat, and a positioning frame is installed on the right side of the fixed seat. The right end of the positioning frame is bent and connected to the right side of the support frame.

[0007] As a preferred embodiment, limiting vertical plates are fixedly installed on both the front and rear sides of the top of the limiting card seat, and the upper end of the limiting vertical plate extends through to the adjusting seat and above the adjusting seat.

[0008] As a preferred embodiment, the bottom of the limiting seat is concave and matches the surface shape of the coating roller.

[0009] As a preferred embodiment, the front and rear sides of the coating roller are connected by a snap-fit ​​bracket, and a knob is rotatably mounted on the outside of the front snap-fit ​​bracket. The front snap-fit ​​bracket is snapped into the upper part of the front fixing plate and slidably installed.

[0010] As a preferred embodiment, an adjustment frame is fixedly installed on the external drive motor at the rear end of the coating roller, and the two extended portions of the adjustment frame are connected to the outside of the rear fixed plate through a sliding rod and a sliding plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model achieves uniform coating of the material by using a curved surface fit design between the limiting card seat and the coating roller, combined with an elastic adjustable clamping mechanism of the support spring and the adjusting screw. This ensures uniform coating thickness and flatness on the nonwoven fabric surface, meeting high industry standards. The adjusting screw can precisely control the downward pressure of the limiting card seat to adapt to the requirements of coating materials with different viscosities and thicknesses. The coating roller achieves sliding installation of the front card holder through the card holder and knob, facilitating quick disassembly and replacement of coating rollers with different textures, and adapting to diverse coating processes.

[0013] 2. This utility model uses a limiting vertical plate that penetrates through the adjusting seat and extends above it to form a vertical physical limit. During the coating process, the lateral force generated when the coating roller rotates or the nonwoven fabric is conveyed can easily cause the limiting seat to move laterally. The limiting vertical plate can firmly restrict it within the fixed track to prevent deviation. The limiting vertical plate increases the connection strength between the limiting seat and the adjusting seat, making the entire coating assembly structure more stable. When the adjusting screw adjusts the fit between the limiting seat and the coating roller, the limiting vertical plate can prevent the seat from tilting or shaking, ensuring that the elastic pressure of the support spring is evenly applied to the surface of the coating roller, thereby maintaining a stable coating pressure. Attached Figure Description

[0014] Figure 1 This is a first-person perspective structural perspective view of the present invention;

[0015] Figure 2 This is a second-view perspective structural perspective view of the present invention;

[0016] Figure 3 This is a partial structural cross-sectional view of the present invention.

[0017] In the diagram: 1. Support frame; 2. First guide roller; 3. Second guide roller; 4. Heating box; 5. Conveying roller; 6. Coating roller; 7. Front fixing plate; 8. Rear fixing plate; 9. Side baffle; 10. Collection box; 11. Limiting bracket; 12. Support spring; 13. Adjusting seat; 14. Fixing seat; 15. Positioning frame; 16. Drive motor; 17. Adjusting screw; 18. Limiting vertical plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Example

[0020] Please see Figure 1 As shown, this utility model provides a uniform coating device for the production of nonwoven fabric for reverse osmosis membranes, including a support frame 1. A first guide roller 2 is installed on the left side of the support frame 1. A heating box 4 is fixedly installed on the right side of the inner cavity of the support frame 1. A second guide roller 3 is installed on the right side of the heating box 4 and outside the support frame 1. Conveying rollers 5 are symmetrically arranged inside the support frame 1. A front fixing plate 7 and a rear fixing plate 8 are respectively installed at the front and rear ends of the conveying rollers 5. The ends of the front fixing plate 7 and the rear fixing plate 8 are connected to the ends of the support frame 1. A coating roller 6 is installed in the middle of the front fixed plate 7 and the rear fixed plate 8. A drive motor 16 is fixedly installed on the outside of the rear fixed plate 8, and the output shaft of the drive motor 16 is connected to the rear end of the coating roller 6. A limit seat 11 is fitted to the upper surface of the coating roller 6. Support springs 12 are fixedly installed on both sides of the top of the limit seat 11. An adjustment seat 13 is installed on the upper end of the support spring 12. An adjustment screw 17 is installed in the internal thread of the adjustment seat 13. The lower end of the adjustment screw 17 is rotatably installed with the top of the limit seat 11.

[0021] This technical solution utilizes the curved surface fit design of the limiting bracket 11 and the coating roller 6, combined with the elastic adjustable clamping mechanism of the support spring 12 and the adjusting screw 17, to achieve uniform scraping of the coating material, ensuring uniform coating thickness and flatness on the nonwoven fabric surface, meeting high industry standards. The adjusting screw 17 can precisely control the downward pressure of the limiting bracket 11 to adapt to the requirements of coating materials with different viscosities and thicknesses. The coating roller 6 achieves sliding installation of the front clamping bracket through the clamping frame and knob, facilitating quick disassembly and replacement of coating rollers 6 with different textures, and adapting to diverse coating processes. Example

[0022] Based on Embodiment 1, this utility model is as follows: Figure 1 As shown, side baffles 9 are installed on both sides of the bottom of the inner cavity of the support frame 1, and a collection box 10 is pulled out between the two side baffles 9. The collection box 10 is located directly below the coating roller 6 and the conveying roller 5. A fixed seat 14 is fixedly installed on the top of the adjusting seat 13, and a positioning frame 15 is installed on the right side of the fixed seat 14. The right end of the positioning frame 15 is bent and connected to the right side of the support frame 1.

[0023] Adopting such Figure 1 The technical solution shown has side baffles 9 located on both sides below the coating roller 6 and the conveying roller 5. These baffles can limit and block the sides of the collection box 10, allowing the collection box 10 to be quickly installed inside the support frame 1. This facilitates the collection of liquid dripping after coating, preventing paint from scattering to other parts of the equipment, ensuring a clean production environment, and reducing equipment maintenance frequency. The collection box 10 directly collects excess paint dripping. By periodically weighing or observing the collection volume, if the collection volume increases abnormally, it may indicate that the gap between the limiting seat 11 and the coating roller 6 is too large or that the material viscosity fluctuates, allowing for timely adjustment of process parameters. The fixed seat 14 is connected to the right side of the support frame 1 through the positioning frame 15, forming a stable support structure. This distributes the force of the adjusting seat 13 to the entire support frame 1. During the coating process, even if the coating roller 6 vibrates at high speed, the adjusting seat 13 can remain stable, preventing uneven contact between the limiting seat 11 and the coating roller 6 due to shaking.

[0024] Secondly, in the technical solution, limiting vertical plates 18 are fixedly installed on both the front and rear sides of the top of the limiting card seat 11. The upper end of the limiting vertical plate 18 extends through to the adjusting seat 13 and extends above the adjusting seat 13. The bottom of the limiting card seat 11 is concave and matches the surface shape of the coating roller 6.

[0025] Its adoption is as follows Figure 1The technical solution shown has a limiting vertical plate 18 that passes through the adjusting seat 13 and extends above it, forming a physical limit in the vertical direction. During the coating process, the lateral force generated by the rotation of the coating roller 6 or the conveying of the nonwoven fabric can easily cause the limiting seat 11 to move laterally. The limiting vertical plate 18 can firmly limit it within the fixed track to prevent deviation. The limiting vertical plate 18 increases the connection strength between the limiting seat 11 and the adjusting seat 13, making the entire coating assembly structure more stable. When the adjusting screw 17 adjusts the fit between the limiting seat 11 and the coating roller 6, the limiting vertical plate 18 can prevent the seat from tilting or shaking, ensuring that the elastic pressure of the supporting spring 12 is evenly applied to the surface of the coating roller 6, thereby maintaining a stable coating pressure. Example

[0026] This utility model is as follows Figures 1-3 As shown, the front and rear sides of the coating roller 6 are connected by snap-fit ​​brackets, and a knob is rotatably installed on the outside of the front snap-fit ​​bracket. The front snap-fit ​​bracket is snapped into the upper part of the front fixing plate 7 and slidably installed. An adjustment bracket is fixedly installed on the outside of the drive motor 16 at the rear end of the coating roller 6, and the two ends of the adjustment bracket are connected to the outside of the rear fixing plate 8 through the cooperation of the slide rod and the slide plate.

[0027] Using the above technical solution, the front snap-fit ​​bracket is fixed to the upper part of the front fixing plate 7 by snap-fit ​​and can slide along it. With the rotation adjustment of the knob, the coating roller 6 can be quickly installed and removed. When it is necessary to replace the coating roller 6 with a different diameter or surface texture to adapt to different coating processes, no complicated tools are required. The snap-fit ​​bracket can be loosened by rotating the knob. The entire replacement process can be shortened, which significantly improves the process switching efficiency of the equipment.

[0028] The working principle of this utility model is as follows: The nonwoven fabric roll is introduced into the device through the first guide roller 2 and conveyed to the coating roller 6 below the conveying roller 5. When it is necessary to adjust the height of the limiting bracket 11, the adjusting screw 17 is rotated to drive the adjusting seat 13 and the support spring 12 to rise or fall, so as to adjust the gap between the limiting bracket 11 and the surface of the coating roller 6. The support spring 12 maintains a constant pressure, and the drive motor 16 drives the coating roller 6 to rotate. The coating material is evenly coated on the surface of the coating roller 6. When the nonwoven fabric passes between the coating roller 6 and the conveying roller 5, the limiting bracket 11 scrapes off the excess material to form a uniform coating. The dripping material is collected by the collection box 10. The coated nonwoven fabric is dried by the heating box 4 and output through the second guide roller 3 to complete the uniform coating process. In addition, the height of the front and rear clips and the coating roller 6 can be adjusted before coating to suit nonwoven fabrics of different thicknesses.

[0029] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0030] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A uniform coating apparatus for the production of nonwoven fabrics for reverse osmosis membranes, comprising a support frame (1), characterized in that: A first guide roller (2) is installed on the left side of the support frame (1). A heating box (4) is fixedly installed on the right side of the inner cavity of the support frame (1). A second guide roller (3) is installed on the right side of the heating box (4) and outside the support frame (1). Conveying rollers (5) are symmetrically arranged inside the support frame (1). A front fixing plate (7) and a rear fixing plate (8) are respectively installed at the front and rear ends of the conveying rollers (5). The ends of the front fixing plate (7) and the rear fixing plate (8) are connected to the ends of the support frame (1). A coating roller (6) is installed in the middle of the coating roller (6). A drive motor (16) is fixedly installed on the outside of the rear fixed plate (8). The output shaft of the drive motor (16) is connected to the rear end of the coating roller (6). A limit seat (11) is fitted on the upper surface of the coating roller (6). Support springs (12) are fixedly installed on both sides of the top of the limit seat (11). An adjustment seat (13) is installed on the upper end of the support spring (12). An adjustment screw (17) is installed on the internal thread of the adjustment seat (13). The lower end of the adjustment screw (17) is rotatably installed on the top of the limit seat (11).

2. The uniform coating device for producing nonwoven fabrics for reverse osmosis membranes according to claim 1, characterized in that: Side baffles (9) are installed on both sides of the bottom of the inner cavity of the support frame (1), and a collection box (10) is pulled out between the two side baffles (9). The collection box (10) is located directly below the coating roller (6) and the conveying roller (5).

3. The uniform coating device for producing nonwoven fabrics for reverse osmosis membranes according to claim 1, characterized in that: A fixed seat (14) is fixedly installed on the top of the adjusting seat (13), and a positioning frame (15) is installed on the right side of the fixed seat (14). The right end of the positioning frame (15) is bent and connected to the right side of the support frame (1).

4. The uniform coating device for producing nonwoven fabrics for reverse osmosis membranes according to claim 1, characterized in that: Limiting vertical plates (18) are fixedly installed on the front and rear sides of the top of the limiting card seat (11). The upper end of the limiting vertical plate (18) extends through to the adjusting seat (13) and extends above the adjusting seat (13).

5. A uniform coating device for the production of nonwoven fabrics for reverse osmosis membranes according to claim 1, characterized in that: The bottom of the limiting seat (11) is concave and matches the surface shape of the coating roller (6).

6. A uniform coating device for the production of nonwoven fabrics for reverse osmosis membranes according to claim 1, characterized in that: The front and rear sides of the coating roller (6) are connected by a snap-fit ​​bracket, and a knob is rotatably installed on the outside of the front snap-fit ​​bracket. The front snap-fit ​​bracket is snapped onto the upper part of the front fixing plate (7) and slidably installed.

7. A uniform coating device for the production of nonwoven fabrics for reverse osmosis membranes according to claim 1, characterized in that: An adjustment frame is fixedly installed on the external drive motor (16) at the rear end of the coating roller (6), and the two ends of the adjustment frame are connected to the external side of the rear fixed plate (8) through a sliding rod and a sliding plate.

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