Device for improving spraying defects

Abstract

The utility model relates to the technical field of spraying, and discloses a device for improving spraying flaws, which comprises a bottom plate, the bottom of a cabinet is fixedly connected to the upper surface of the bottom plate, the inner wall of the cabinet is fixedly connected with a connecting column, the bottom of a material receiving disc is fixedly connected with material receiving pipes which are in bilateral symmetry, one end of each material receiving pipe is fixedly connected with a spraying material box, and the other end of each material receiving pipe is fixedly connected with a spraying material box. The spraying material box is connected to the inner wall of the machine cabinet in a sliding mode, a fixing assembly is arranged on the side wall of the spraying material box, and the fixing assembly is used for fixing the spraying material box. According to the utility model, the rotary nozzle throws PVDF slurry into small liquid drops and sprays the small liquid drops to the surface of a film, during long-time operation, large liquid drops can be accumulated on the upper edge and the lower edge of the spraying window, the large liquid drops fall into the material receiving disc to avoid coating marks, and the material receiving hose below the material receiving disc introduces the slurry into the spraying material box, so that the coating marks are reduced, the cost is reduced, and the film spraying quality and the production efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of spraying technology, and in particular to a device for improving spraying defects. Background Technology

[0002] In modern manufacturing, the spraying process for materials such as thin films is widely used, for example in the manufacturing of electronic equipment, the production of packaging materials, and the processing of functional films. These industries have extremely high requirements for the quality of films, especially the quality of surface coatings. PVDF materials are often used as film spraying materials due to their excellent chemical stability, corrosion resistance, and mechanical properties. In order to meet the needs of high-quality production, there is an urgent need for a device that can effectively improve spraying defects, thereby improving production efficiency and product quality, reducing production costs, and adapting to increasingly fierce market competition.

[0003] In existing thin-film coating technologies, common mechanical structures include spray guns, feeding systems, and simple support devices. Spray guns typically employ traditional pneumatic or hydraulic structures, using pressure to spray paint from nozzles. The feeding system generally consists of a paint storage container and a delivery pipeline. Under the influence of gravity or pressure difference, the paint is transported to the spray gun through the pipeline. In terms of technical principles, the main principle is to utilize the pressure generated by the spray gun to atomize the paint into small particles. These small particles then fly towards the film surface and adhere under the influence of aerodynamics.

[0004] In current thin-film spraying processes, especially when using PVDF slurry, severe coating marks are prone to occur. Due to the lack of an effective droplet handling mechanism, during prolonged spraying, small PVDF droplets ejected from the nozzle accumulate near the spray window to form large droplets. These large droplets randomly fall onto the film surface, and the drying oven cannot dry them. These large droplets then remain on the pressure roller after passing through, adhering to the subsequently passing films and causing continuous coating mark contamination. These coating marks severely affect the surface quality of the film, making the product unsuitable for high-quality production. Moreover, once coating marks occur, the repair cost is high, and it also leads to a large amount of material waste, increasing production costs. Therefore, a device for improving spraying defects is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a device for improving spray coating defects, which aims to improve the problem of coating marks caused by large droplets in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An apparatus for improving coating defects includes a base plate, a feeding assembly is provided on one side of the top of the base plate for providing the apparatus with a raw film to be coated, and a processing assembly is provided on the other side of the top of the base plate for coating the raw film.

[0008] The processing assembly includes a cabinet, the bottom of which is fixedly connected to the upper surface of the base plate. An isolation assembly is provided on the outer wall of the cabinet to isolate the original film from the outside environment. A drying assembly is provided on the inner wall of the cabinet to heat and dry the coated film. A connecting column is fixedly connected to the inner wall of the cabinet, and a spraying assembly is located at the bottom of the connecting column. The spraying assembly is used to spray the original film. A receiving tray is located in front of the spraying assembly, and symmetrical receiving pipes are fixedly connected to the bottom of the receiving tray. A spray paint box is fixedly connected to one end of each receiving pipe. The spray paint box is slidably connected to the inner wall of the cabinet, and a fixing assembly is provided on the side wall of the spray paint box to fix it in place.

[0009] As a further description of the above technical solution:

[0010] The feeding assembly includes a support arm, the bottom of which is fixedly connected to the upper surface of the base plate. The support arms are symmetrically distributed on the upper surface of the base plate. Multiple vertically symmetrical rotating rollers are rotatably connected between the support arms. A thin film is slidably connected to the outer wall of each rotating roller.

[0011] As a further description of the above technical solution:

[0012] The isolation assembly includes a protrusion, the sidewall of which is fixedly connected to the outer wall of the cabinet, and a passage groove is provided inside the protrusion, with a thin film slidably connected to the inner wall of the passage groove;

[0013] As a further description of the above technical solution:

[0014] The drying assembly includes a drying chamber, the outer wall of which is fixedly connected to the inner wall of the cabinet, and the drying chamber is located inside the upper part of the cabinet;

[0015] As a further description of the above technical solution:

[0016] The spraying assembly includes a sprayer, the top of which is fixedly connected to the bottom of the connecting column, a plurality of rotating nozzles fixedly connected to the output end of the sprayer, a spraying window fixedly connected to the side wall of the sprayer, the rotating nozzles being located on the inner wall of the spraying window, and a feed hose fixedly connected to the bottom of the sprayer, with a filter fixedly connected to the bottom of the feed hose.

[0017] As a further description of the above technical solution:

[0018] The fixing component includes a slide rail, the sidewalls of which are fixedly connected to the left and right sides of the inner wall of the cabinet, and a slider is slidably connected to the inner wall of the slide rail, the sidewalls of which are fixedly connected to the left and right sides of the outer wall of the paint box.

[0019] As a further description of the above technical solution:

[0020] The top of the paint box is provided with a groove, and the cabinet side wall is rotatably connected with a cabinet door;

[0021] As a further description of the above technical solution:

[0022] Multiple positioning holes are provided on both the upper and lower sides of the inner wall of the slide groove. A spring is fixedly connected to the inner wall of the positioning hole, and a ball is fixedly connected to one end of the spring. Multiple positioning grooves are provided on both the upper and lower layers of the outer wall of the slider, and the ball is slidably connected to the inner wall of the positioning groove.

[0023] This utility model has the following beneficial effects:

[0024] In this invention, the high-speed rotation of the rotary nozzle throws the PVDF slurry into small droplets and sprays them onto the film surface. However, after long-term operation, large droplets accumulate along the upper and lower edges of the spray window. These large droplets fall onto the receiving tray to avoid coating marks. The receiving hose below the receiving tray introduces the PVDF slurry into the spray coating box, reducing slurry loss and minimizing coating marks caused by large droplets. This reduces production costs and improves film coating quality and production efficiency.

[0025] In this invention, the cabinet door is first opened, the groove is engaged, and the paint box is pulled. The paint box causes the slider to move, causing the spring to retract, thus removing the paint box and the receiving tray together for cleaning. After cleaning, the slider is aligned with the slide groove, and the paint box is pushed inward. The ball bearings enter the positioning groove under the action of the spring, completing the locking of the paint box. This solves the problem of inconvenient equipment maintenance and improves equipment maintenance efficiency and equipment service life. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a device for improving spray coating defects proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the protruding platform of a device for improving coating defects proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the receiving tray of a device for improving coating defects proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of a sprayer for improving coating defects proposed in this utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the paint box of the device for improving coating defects proposed in this utility model.

[0031] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0032] Legend:

[0033] 1. Base plate; 2. Support arm; 3. Rotating roller; 4. Film; 5. Cabinet; 6. Protruding platform; 7. Through groove; 8. Drying oven; 9. Connecting column; 10. Sprayer; 11. Rotating nozzle; 12. Spraying window; 13. Receiving tray; 14. Receiving pipe; 15. Spray paint box; 16. Feed hose; 17. Filter; 18. Slide rail; 19. Slider; 20. Positioning hole; 21. Spring; 22. Ball bearing; 23. Positioning groove; 24. Cabinet door; 25. Groove. Detailed Implementation

[0034] 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.

[0035] Reference Figure 1 and Figure 2This utility model provides an embodiment of a device for improving coating defects, comprising a base plate 1, a feeding assembly on one side of the top of the base plate 1 for providing the device with the original film to be coated, and a processing assembly on the other side of the top of the base plate 1 for coating the original film; the processing assembly includes a cabinet 5, the bottom of which is fixedly connected to the upper surface of the base plate 1, an isolation assembly on the outer wall of the cabinet 5 for isolating the original film from the outside, a drying assembly on the inner wall of the cabinet 5 for heating and drying the coated film, and a connecting column 9 fixedly connected to the inner wall of the cabinet 5, with a coating assembly at the bottom of the connecting column 9 for coating the original film. A receiving tray 13 is installed in front of the spraying assembly to accurately catch large droplets falling from the spraying window 12. The receiving tray 13 is made of corrosion-resistant plastic material and has a certain inclined angle at the bottom to facilitate the flow of liquid to the receiving pipe 14. The bottom of the receiving tray 13 is fixedly connected to symmetrical receiving pipes 14. The receiving pipes 14 ensure that the PVDF slurry flows smoothly from the receiving tray 13 to the spraying material box 15 under the action of gravity. One end of the receiving pipe 14 is fixedly connected to the spraying material box 15. The spraying material box 15 is a key component for storing and supplying PVDF slurry. The spraying material box 15 is slidably connected to the inner wall of the cabinet 5. The side wall of the spraying material box 15 is provided with a fixing component for fixing the spraying material box. 15. The feeding assembly includes support arms 2, with their bottoms fixedly connected to the upper surface of the base plate 1. The support arms 2 are symmetrically distributed on the upper surface of the base plate 1. Multiple vertically symmetrical rotating rollers 3 are rotatably connected between the support arms 2. The rotating rollers 3 are key components for feeding; each roller consists of a central shaft and a roller body, which wraps around the central shaft. The roller body is made of a rubber material with elasticity and wear resistance, and its surface has textures to increase friction with the film 4, preventing slippage of the film 4 on the rotating rollers 3. The film 4 is slidably connected to the outer wall of the rotating rollers 3. The film 4 is orderly transferred between the multiple vertically symmetrical rotating rollers 3. Through their synergistic action, the film 4... The isolation assembly includes a protrusion 6, whose sidewall is fixedly connected to the outer wall of the cabinet 5. The protrusion 6 is made of metal and has good structural stability. The protrusion 6 has a through groove 7 inside, which is designed for the smooth passage of the membrane 4. The membrane 4 is slidably connected to the inner wall of the through groove 7. The inner wall of the through groove 7 is ground and polished to reduce the frictional resistance of the membrane 4 during passage and prevent the surface of the membrane 4 from being scratched. Its width and height are matched with the thickness and width of the membrane 4 to ensure that the membrane 4 can maintain good positional accuracy when passing through and will not be offset or stuck.

[0036] Specifically, when using this device, the rotating roller 3 first feeds the film 4 into the through groove 7 of the protrusion 6. At this time, the sprayer 10 inside the cabinet 5 starts to work. The rotating nozzle 11 in the sprayer 10 rotates at high speed, throwing out PVDF slurry into small PVDF droplets, which are then sprayed onto the surface of the film 4. However, during long-term operation, due to the physical properties of PVDF slurry and some factors in the spraying process, large PVDF droplets will gradually accumulate at the upper and lower edges of the spraying window 12. When the large droplets accumulated on the inner wall of the spraying window 12 drip down, due to the design of the receiving tray 13, the large PVDF droplets will fall directly into the receiving tray 13. The receiving pipe 14 below the receiving tray 13 can introduce the accumulated PVDF slurry into the spray coating box 15. When the receiving pipe 14 introduces the accumulated PVDF slurry into the spray coating box 15, the slurry loss can be reduced, thereby achieving the effect of reducing coating marks and reducing PVDF slurry loss.

[0037] Reference Figure 3 - Figure 5The drying assembly includes a drying chamber 8, which contains heating wires evenly distributed throughout its interior to generate uniform heat. The outer wall of the drying chamber 8 is fixedly connected to the inner wall of the cabinet 5, and the drying chamber 8 is located at the top inside the cabinet 5. The spraying assembly includes a sprayer 10, whose top is fixedly connected to the bottom of a connecting column 9. The connecting column 9 provides a stable support structure for the sprayer 10 and is made of stainless steel, possessing good corrosion resistance and sufficient strength to withstand the weight of the sprayer 10 during operation and any potential vibrations. The output end of the sprayer 10 is fixedly connected to... Multiple rotating nozzles 11 are connected. During rotation, the slurry is ejected from the nozzle orifices under centrifugal force, forming uniform small droplets. These droplets impact the surface of the film 4 at high speed, forming a uniform coating. A spray window 12 is fixedly connected to the side wall of the sprayer 10. The spray window 12 is a key component that isolates the spraying area from other parts inside the cabinet 5. It is made of transparent plastic material, which allows operators to observe the spraying process while withstanding the impact and pressure that may occur during spraying. The rotating nozzles 11 are located on the inner wall of the spray window 12, and the bottom of the sprayer 10 is fixedly connected to... The system includes a feed hose 16. The inner layer of the feed hose 16 is made of a corrosion-resistant material, such as polytetrafluoroethylene (PTFE), which is in direct contact with the PVDF slurry. This material has extremely low surface energy, preventing the slurry from adhering to the hose wall and exhibiting excellent chemical resistance. The outer layer is made of rubber with a certain strength and wear resistance, used to protect the inner layer and provide mechanical strength. A filter 17 is fixedly connected to the bottom of the feed hose 16. The filter 17 effectively filters out impurities in the slurry, ensuring the purity of the slurry entering the sprayer 10. The fixing assembly includes a chute 18, which can accommodate a slider 19. A stable sliding track is provided. The side wall of the slide 18 is fixedly connected to the left and right sides of the inner wall of the cabinet 5. The inner wall of the slide 18 is slidably connected to the slider 19, which fits tightly with the slide 18 to ensure that the paint box 15 slides smoothly in the cabinet 5. The side wall of the slider 19 is fixedly connected to the left and right sides of the outer wall of the paint box 15. The top of the paint box 15 is provided with a groove 25. The edge of the groove 25 is rounded to avoid scratching the hands of the staff. The side wall of the cabinet 5 is rotatably connected to the cabinet door 24, which makes it convenient for the operator to add or check the PVDF slurry. The edge of the cabinet door 24 is designed with a sealing rubber strip to prevent external impurities from entering.

[0038] Specifically, after the film 4 is coated, the rotation of the rotating roller 3 will cause the film 4 to move upward. At this time, the drying chamber 8 in the cabinet 5 will start to work to heat and dry the freshly coated film 4. During the drying process, the hot air circulates in the drying chamber 8 and comes into full contact with the PVDF coating on the surface of the film 4, so that the solvent in the coating evaporates quickly, thereby making the coating dry and solidify quickly. The dried film 4 will be uniformly collected on the surface of the rotating roller 3 above as the rotating roller 3 rotates, completing the entire coating and drying process.

[0039] Reference Figure 6 Multiple positioning holes 20 are provided on both the upper and lower sides of the inner wall of the slide groove 18. The inner wall of the slide groove 18 is tightly fitted with the outer diameter of the spring 21, which can ensure that the spring 21 can stably extend and retract within the positioning hole 20 without any deviation. The spring 21 is fixedly connected to the inner wall of the positioning hole 20. The spring 21 has good elasticity to ensure that it can provide appropriate elastic force to the ball 22 under normal working conditions, so as to achieve positioning of the slider 19. One end of the spring 21 is fixedly connected to the ball 22. Multiple positioning grooves 23 are provided on both the upper and lower layers of the outer wall of the slider 19. The shape and size of the positioning groove 23 match the ball 22, which can ensure that the ball 22 slides in it. The ball 22 is slidably connected to the inner wall of the positioning groove 23.

[0040] Specifically, during routine equipment maintenance, staff need to follow standardized procedures to thoroughly clean the equipment to ensure its performance and lifespan. First, staff should gently pull outwards from the handle of cabinet door 24 to open it. Next, remove the feed hose 16 and filter 17 from inside the paint box 15. Then, manually engage the groove 25 and pull the paint box 15 outwards. The paint box 15 will move outwards under the pulling force. This displacement of the paint box 15 will cause the slider 19 to move as well. The displacement of the slider 19 will cause the spring 21 on the inner wall of the slide 18 to retract into the positioning hole 20. This allows the paint box 15 and its outer receiving tray 13 to be removed and cleaned together. After moving the paint box 15 and receiving tray 13 to a suitable cleaning area, use specialized cleaning tools and cleaning agents. The cleaning solution thoroughly cleans the components. After cleaning, the operator aligns the slider 19 with the slide groove 18 and pushes the paint box 15 inward. When pushed to the bottom, the ball bearings 22 inside the slide groove 18 lose the lateral pressure from the slider 19, and the spring 21 begins to rebound, pushing the ball bearings 22 back to their original position. After losing external pressure, the spring 21 quickly rebounds using its stored elastic potential energy, and its elastic force pushes the ball bearings 22 outward along the axial direction of the positioning hole 20. The ball bearings 22 pop out of the positioning hole 20 and enter the positioning groove 23 on the side wall of the slider 19. The ball bearings 22 accurately embed into the positioning groove 23, achieving precise positioning of the slider 19 and locking the paint box 15. This achieves the effect of quickly picking up and putting away the paint box 15, thus efficiently maintaining the equipment, reducing equipment maintenance time, and improving equipment availability and production efficiency.

[0041] Working principle: When using this device, the rotating roller 3 first feeds the film 4 into the through groove 7 of the protrusion 6. At this time, the sprayer 10 inside the cabinet 5 starts working. The rotating nozzle 11 in the sprayer 10 rotates at high speed, throwing out PVDF slurry into small PVDF droplets, which are then sprayed onto the surface of the film 4. However, during long-term operation, large PVDF droplets gradually accumulate at the upper and lower edges of the spray window 12. When the large droplets accumulated on the inner wall of the spray window 12 drip downwards, they fall directly into the receiving tray 13, avoiding coating marks. At the same time, the receiving pipe 14 below the receiving tray 13 can introduce the accumulated PVDF slurry into the spray paint box 15, which can reduce slurry loss. This achieves the effect of reducing coating marks and reducing PVDF slurry loss. After the film 4 is sprayed, the rotation of the rotating roller 3 will cause the film 4 to move upward. At this time, the drying box 8 inside the cabinet 5 starts working to heat and dry the freshly sprayed film 4. The dried film 4 will then move upwards with the rotation of the rotating roller 3. The moving parts are uniformly stored on the surface of the rotating roller 3 above. During routine maintenance of the equipment, the staff needs to clean the inner wall of the equipment. First, the cabinet door 24 can be manually opened to remove the feed hose 16 and filter 17 from the inside of the paint box 15. Then, the groove 25 is manually engaged, and the paint box 15 is pulled outward. At this time, the displacement of the paint box 15 causes the slider 19 to move as well. The displacement of the slider 19 causes the spring 21 on the inner wall of the slide groove 18 to retract into the positioning hole 20. Therefore, it is possible to... The paint box 15 and its outer receiving tray 13 are removed and cleaned together. After cleaning, the staff aligns the slider 19 with the slide groove 18 and pushes the paint box 15 inward. When it is pushed all the way in, the ball bearings 22 inside the slide groove 18 lose the squeezing force of the slider 19, and the spring 21 begins to rebound and push the ball bearings 22 back to their original position. The ball bearings 22 enter the positioning groove 23 on the side wall of the slider 19, thus locking the paint box 15. This achieves the effect of quickly taking out and putting in the paint box 15, thereby efficiently maintaining the equipment.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for improving spray defects, comprising a base plate (1), characterized in that: The bottom plate (1) top side is provided with an upper assembly, the upper assembly is used for providing the device with the original film to be sprayed, the bottom plate (1) top other side is provided with processing assembly, the processing assembly is used for the original film is sprayed processing; The processing assembly includes a cabinet (5), the bottom of the cabinet (5) is fixedly connected to the upper surface of the bottom plate (1), the outer wall of the cabinet (5) is provided with an isolation assembly, the assembly is used to isolate the original film from the outside world, the inner wall of the cabinet (5) is provided with a drying assembly, the drying assembly is used for heating and drying the film after spraying, the inner wall of the cabinet (5) is fixedly connected with a connecting column (9), the bottom of the connecting column (9) is provided with a spraying assembly, the spraying assembly is used for spraying operation to the original film, the front of the spraying assembly is provided with a receiving tray (13), the bottom of the receiving tray (13) is fixedly connected with a left-right symmetrical receiving pipe (14), one end of the receiving pipe (14) is fixedly connected with a spraying box (15), the spraying box (15) is slidingly connected to the inner wall of the cabinet (5), the side wall of the spraying box (15) is provided with a fixing assembly, the fixing assembly is used for fixing the spraying box (15).

2. The apparatus for improving spray defects of claim 1, wherein: The upper assembly includes a support arm (2), the bottom of the support arm (2) is fixedly connected to the upper surface of the bottom plate (1), the support arm (2) is distributed on the upper surface of the bottom plate (1) left-right symmetrically, a plurality of upper and lower symmetrical rotating rollers (3) are rotatably connected between the support arms (2), the outer wall of the rotating roller (3) is slidingly connected with a film (4).

3. The apparatus for improving spray defects of claim 1, wherein: The isolation assembly includes a protruding table (6), the side wall of the protruding table (6) is fixedly connected to the outer wall of the cabinet (5), the inside of the protruding table (6) is provided with a through groove (7), the inner wall of the through groove (7) is slidingly connected with a film (4).

4. The apparatus for improving spray defects of claim 1, wherein: The drying assembly includes a drying box (8), the outer wall of the drying box (8) is fixedly connected to the inner wall of the cabinet (5), and the drying box (8) is located above the inside of the cabinet (5).

5. The apparatus for improving spray defects of claim 1, wherein: The spraying assembly includes a sprayer (10), the top of the sprayer (10) is fixedly connected to the bottom of the connecting column (9), a plurality of rotating nozzles (11) are fixedly connected to the output end of the sprayer (10), a spraying window (12) is fixedly connected to the side wall of the sprayer (10), the rotating nozzles (11) are located in the inner wall of the spraying window (12), a feeding hose (16) is fixedly connected to the bottom of the sprayer (10), and a filter (17) is fixedly connected to the bottom of the feeding hose (16).

6. The apparatus for improving spray defects of claim 1, wherein: The fixing assembly includes a sliding groove (18), the side wall of the sliding groove (18) is fixedly connected to the left and right sides of the inner wall of the cabinet (5), a sliding block (19) is slidingly connected to the inner wall of the sliding groove (18), and the side wall of the sliding block (19) is fixedly connected to the outer wall of the spraying box (15) left and right sides.

7. The apparatus for improving spray imperfections of claim 6, wherein: The top of the spraying box (15) is provided with a groove (25), and the side wall of the cabinet (5) is rotatably connected with a cabinet door (24).

8. The apparatus for improving spray defects of claim 6, wherein: The inner wall of the chute (18) is provided with a plurality of positioning holes (20) on the upper and lower sides, the inner wall of the positioning hole (20) is fixedly connected with a spring (21), one end of the spring (21) is fixedly connected with a ball (22), the outer wall of the sliding block (19) is provided with a plurality of positioning grooves (23) on the upper and lower layers, and the ball (22) is slidingly connected to the inner wall of the positioning groove (23).

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