Water-based nano ceramic coating preparation device for aluminum alloy hub

Abstract

The invention discloses an aluminum alloy hub water-based nano ceramic coating preparation device which comprises a stirring barrel, a foot stool, a supporting sleeve and a driving box, the stirring barrel is installed on the foot stool, a feeding port is formed in the upper portion of the stirring barrel, the supporting sleeve is installed at the top of the stirring barrel, a driving shaft is installed in the supporting sleeve, and a rotating seat is installed at the bottom of the stirring barrel; the lower end of the driving shaft is rotatably arranged on the rotating seat, a lower stirring piece is mounted on the driving shaft, a lifting sleeve sleeves the periphery of the driving shaft, a rotating sleeve is rotatably arranged at the bottom of the lifting sleeve, and an upper stirring piece is connected to the lower end of the rotating sleeve; a linkage groove formed in the axial direction of the driving shaft is formed in the periphery of the driving shaft, a linkage block is connected into the rotating sleeve, and the linkage block is arranged in the linkage groove and can move along the linkage groove. The stirring device can effectively stir and mix materials.

Description

Technical Field

[0001] This invention relates to the field of coating preparation technology, and more specifically, to an apparatus for preparing water-based nano-ceramic coatings for aluminum alloy wheel hubs. Background Technology

[0002] With increasingly stringent environmental regulations and rising demand for high-performance coatings, water-based nano-ceramic coatings are widely used in aluminum alloy wheel coating. These coatings require the uniform mixing of film-forming substances such as modified silica sol and water-based organosilicon resin with nanofillers such as nano-zirconia, nano-silica, and nano-alumina. However, nanofillers have high specific surface area and surface energy, making them prone to agglomeration, and the density and viscosity of the coating components vary. Traditional mixing devices have the following drawbacks: a single mixing method cannot adapt to the mixing requirements of different material amounts; when there is a large amount of material, it is difficult to achieve uniform mixing of the entire area using only a single mixing component, easily leading to uneven mixing between the upper and lower layers; when there is a small amount of material, the contact between the mixing component and the material is insufficient, resulting in inadequate mixing force and the inability to effectively break up the agglomeration of nanofillers. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for preparing water-based nano-ceramic coatings for aluminum alloy wheels.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This invention discloses a device for preparing water-based nano-ceramic coatings for aluminum alloy wheel hubs, comprising a mixing tank, a stand, a support sleeve, and a drive box. The mixing tank is mounted on the stand and has a feed inlet at its upper part. The support sleeve is mounted on the top of the mixing tank and contains a drive shaft. A rotating seat is mounted at the bottom of the mixing tank, and the lower end of the drive shaft is rotatably mounted on the rotating seat. A lower stirring component is mounted on the drive shaft. A lifting sleeve is fitted around the outer periphery of the drive shaft, and a rotating sleeve is rotatably mounted at the bottom of the lifting sleeve. An upper stirring component is connected to the lower end of the rotating sleeve. A linkage groove is formed on the outer periphery of the drive shaft along its axial direction. A linkage block is connected inside the rotating sleeve and is located within the linkage groove, allowing it to move along the groove. The device also includes a telescopic rod mounted on the support sleeve, which drives and connects to the lifting sleeve. The drive box includes a mounting box containing a drive motor. The drive motor drives and connects to a drive gear. The upper end of the drive shaft passes through the support sleeve and extends into the mounting box. A driven gear is mounted on the drive shaft. An opening is formed on the lifting sleeve for the driven gear to protrude, and the drive gear meshes with the driven gear.

[0006] Furthermore, the lower mixing component includes a lower mixing disc, on the upper surface of which a plurality of vertically arranged lower mixing blocks are evenly installed; the upper mixing component includes an upper mixing disc, on the lower surface of which a plurality of vertically arranged upper mixing blocks are evenly installed; the outer periphery of the upper mixing disc and the lower mixing disc are respectively provided with notches for the lower mixing blocks and the upper mixing blocks to pass through, and when the upper mixing component and the lower mixing component are closed, the lower mixing blocks and the upper mixing blocks are relatively staggered.

[0007] Furthermore, a second receiving cavity is provided at the lower part of the upper mixing plate, and a lower washing blade is provided in the second receiving cavity. The lower end face of the lower washing blade is convex and has a state of being low in the middle and high on the outer periphery.

[0008] Furthermore, a receiving cavity is provided on the upper part of the lower mixing plate, and several upper washing blades are installed at the bottom of the receiving cavity. The upper end face of the upper washing blades is arc-shaped and the inner height is lower than the outer height. The several upper washing blades are evenly distributed in a circular shape at the bottom of the receiving cavity. The projection of the lower washing blades on the bottom surface of the receiving cavity is located within the coverage area formed by the inner ends of the several upper washing blades.

[0009] Furthermore, a clearance groove is provided on the inner wall of the lifting sleeve, and part of the driven gear can be located in the clearance groove to avoid contact interference between the driven gear and the inner wall of the lifting sleeve.

[0010] Furthermore, it also includes an auxiliary stirring mechanism, which includes a bottom stirring rod and a side stirring rod connected together. One end of the bottom stirring rod is fixedly connected to the outer periphery of the drive shaft. The bottom stirring rod is arranged along the bottom shape of the mixing tank. The side stirring rod is connected to the end of the bottom stirring rod away from the drive shaft and is vertically arranged along the side wall of the mixing tank.

[0011] Furthermore, several scrapers are provided on the lower part of the bottom stirring rod and the outer side of the side stirring rod to scrape off residual materials on the bottom and side walls of the mixing tank.

[0012] Furthermore, the upper end of the lifting sleeve extends out of the mounting box and is connected to a support plate. The telescopic rod drives the support plate, and the extension and retraction of the telescopic rod drives the lifting sleeve and the upper mixing component to rise and fall as a whole.

[0013] The beneficial effects of this invention are as follows: the upper stirring component is raised and lowered by the telescopic rod, realizing the separation and closure of the upper and lower stirring components. When there is a large amount of material, axial circulation stirring is formed, and when there is a small amount of material, concentrated stirring is performed, which effectively solves the mixing problem under different material amounts and improves the stirring adaptability. The axial circulation stirring mechanism promotes full exchange of materials between the upper and lower layers. Combined with the stirring of the radial stirring block and the auxiliary stirring mechanism, it realizes the mixing of materials in the whole area without dead corners, effectively breaks the agglomeration of nanofillers, and ensures that the components of the coating are uniformly dispersed. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a device for preparing water-based nano-ceramic coatings for aluminum alloy wheels in this embodiment.

[0015] Figure 2 This is a cross-sectional view of the apparatus for preparing water-based nano-ceramic coatings for aluminum alloy wheel hubs in this embodiment;

[0016] Figure 3 This is a cross-sectional view of another state of the water-based nano-ceramic coating preparation device for aluminum alloy wheel hubs in this embodiment;

[0017] Figure 4 This is a schematic diagram showing the cooperation between the upper and lower stirring components in this embodiment;

[0018] Figure 5 This is a schematic diagram of the installation of the lifting sleeve and the drive shaft in this embodiment.

[0019] Reference numerals: 1. Mixing tank; 2. Feed inlet; 3. Support sleeve; 4. Drive box; 5. Leg; 6. Rotating seat; 7. Drive shaft; 8. Bottom mixing rod; 9. Side mixing rod; 10. Scraper; 11. Lower mixing component; 12. Lifting sleeve; 13. Rotating sleeve; 14. Upper mixing component; 15. Lower mixing plate; 16. Lower mixing block; 17. Receiving cavity one; 18. Upper washing blade; 19. Upper mixing plate; 20. Upper mixing block; 21. Receiving cavity two; 22. Lower washing blade; 23. Notch; 24. Linkage block; 25. Linkage groove; 26. Driven gear; 27. Drive motor; 28. Drive gear; 29. ​​Support plate; 30. Telescopic rod; 31. Opening; 32. Mounting box; 33. Clearance groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1-5 As shown, a device for preparing water-based nano-ceramic coatings for aluminum alloy wheel hubs includes a mixing tank 1, a stand 5, a support sleeve 3, and a drive box 4. The mixing tank 1 is mounted on the stand 5. The mixing tank 1 is made of stainless steel, with an inner diameter of 800 mm and a height of 1200 mm. The stand 5 is made of carbon steel and welded together, with a height of 600 mm to ensure stable placement of the mixing tank 1. A feed inlet 2 is provided at the top of the mixing tank 1, and a cover plate is installed on the feed inlet 2. The support sleeve 3, which is cylindrical, is fixedly installed on the top of the mixing tank 1 by bolts. A rotating seat 6 is fixedly installed at the center of the bottom of the mixing tank 1. A drive shaft 7 is installed inside the mixing tank 1, and the lower end of the drive shaft 7 is rotatably connected to the rotating seat 6 through a bearing. The drive shaft 7 passes through the support sleeve 3.

[0022] A lower stirring component 11 is mounted on the drive shaft 7. A lifting sleeve 12 is fitted around the outer periphery of the drive shaft 7. A rotating sleeve 13 is rotatably mounted at the bottom of the lifting sleeve 12, and an upper stirring component 14 is connected to the lower end of the rotating sleeve 13. The lower stirring plate 15 of the lower stirring component 11 has a diameter of 600 mm and a thickness of 20 mm. Eight vertically arranged lower stirring blocks 16 are mounted on the upper end face. The lower stirring blocks 16 are cuboid structures with a length of 50 mm, a width of 30 mm, and a height of 80 mm, and are evenly distributed on the upper end face of the lower stirring plate 15. The upper stirring plate 19 of the upper stirring component 14 has the same diameter and thickness as the lower stirring plate 15. Eight vertically arranged upper stirring blocks 20 with the same dimensions as the lower stirring blocks 16 are mounted on the lower end face of the upper stirring plate 19, and are evenly distributed on the lower end face of the upper stirring plate 19. The diameters of the upper stirring plate 19 and the lower stirring plate 15 are adapted to the inner diameter of the mixing tank 1, which can maximize the coverage of the mixing area and reduce the number of dead corners. Eight evenly distributed stirring blocks increase the contact area with the material, and the vertically arranged structure generates strong radial shear force when rotating, effectively breaking up easily agglomerated nanofillers such as nano-zirconia and nano-silica in water-based nano-ceramic coatings, preventing agglomerates from affecting the coating's density. The size design of the stirring blocks balances stirring force and material flowability, providing sufficient shear force to break up agglomerates without obstructing material flow due to excessive size, thus ensuring stirring efficiency.

[0023] Both the upper mixing plate 19 and the lower mixing plate 15 have eight notches 23 on their outer periphery, the size of which is adapted to the mixing blocks. The notch 23 design ensures that when the upper and lower mixing components are closed, the lower mixing block 16 can pass through the notch 23 of the upper mixing plate 19, and the upper mixing block 20 can pass through the notch 23 of the lower mixing plate 15, avoiding collisions and interference between the mixing blocks. Simultaneously, the upper and lower mixing blocks are arranged in a staggered pattern, forming a more complex mixing path, allowing for cross-cutting mixing of small amounts of material, significantly improving mixing intensity. The staggered distribution of the mixing blocks allows the material to fully tumble and collide within a limited space, promoting molecular-level contact between the modified silica sol, water-based organosilicon resin, and nanofillers, solving the problem of insufficient mixing with small amounts of material, and ensuring uniform mixing of all components of the coating.

[0024] like Figure 4As shown, cavity 17 is located at the center of the upper part of the lower mixing plate 15, with a diameter of 450 mm and a depth of 30 mm. It contains eight upper washing blades 18, each with an arc-shaped upper surface, a radius of 150 mm, an inner height of 20 mm, and an outer height of 40 mm. Cavity 21 is located at the center of the lower part of the upper mixing plate 19, with the same diameter as cavity 17 and a depth of 30 mm. It contains one lower washing blade 22, with a convex lower surface radius of 150 mm, a middle height of 10 mm, and an outer circumferential height of 30 mm. Several upper washing blades 18 are evenly distributed in a circular pattern at the bottom of cavity 17. Cavities 17 and 21 form a material circulation channel, providing space for axial material flow. The arc-shaped design of the upper washing blades 18, with a lower inner side and a higher outer side, generates an upward thrust on the material below when rotating. Furthermore, the eight evenly distributed upper washing blades 18 create a stable upward airflow, ensuring the material rises smoothly. The convex structure of the lower washing blade 22, which is low in the middle and high on the outer periphery, can generate a downward thrust on the material above when rotating. This thrust works in synergy with the thrust of the upper washing blade 18 to create a complete axial circulation path. This circulation design completely solves the defects of traditional stirring, which only focuses on radial mixing and makes it difficult to exchange materials between the upper and lower layers. It allows the water-based silicone resin at the top to fully contact the nanofiller at the bottom, avoiding stratification and ensuring the overall performance consistency of the coating.

[0025] The projection of the lower washing blade 22 onto the bottom surface of the receiving cavity 17 lies within the coverage area formed by the inner ends of several upper washing blades 18. The material pushed by the lower washing blade 22 is located near the center and can accurately fall into the working area of ​​the upper washing blades 18, allowing the material to be retained in the circulation channel and improving material circulation efficiency. At the same time, some of the descending material and the ascending material form convective collisions in the receiving cavity area, further enhancing the mixing effect, shortening the stirring time, and improving production efficiency; at the same time, it avoids material residue at the edge of the circulation channel, reducing raw material waste and lowering production costs.

[0026] A linkage groove 25 is provided on the outer periphery of the drive shaft 7, and the linkage groove 25 is arranged along the axial direction of the drive shaft 7. A linkage block 24 is connected inside the rotating sleeve 13, and the linkage block 24 is arranged in the linkage groove 25. The linkage block 24 can move along the linkage groove 25. Through the cooperation of the linkage block 24 and the linkage groove 25, the drive shaft 7 can drive the rotating sleeve 13 to rotate synchronously, and the rotating sleeve 13 can move along the axial direction of the drive shaft 7. This device also includes a telescopic rod 30 installed on the support sleeve 3. The telescopic rod 30 is driven and connected to the support plate 29. The upper end of the lifting sleeve 12 extends out of the mounting box 32 and is connected to the support plate 29. The drive box 4 includes a mounting box 32. A drive motor 27 is installed in the mounting box 32. The drive motor 27 is driven and connected to a drive gear 28. The upper end of the drive shaft 7 passes through the support sleeve 3 and extends into the mounting box 32. A driven gear 26 is installed on the drive shaft 7. An opening 31 is provided on the lifting sleeve 12 for the driven gear 26 to be exposed. The drive gear 28 meshes with the driven gear 26. An avoidance groove 33 is provided on the inner wall of the lifting sleeve 12, and part of the driven gear 26 can be located in the avoidance groove 33, thereby avoiding contact with the inner wall of the lifting sleeve 12.

[0027] An auxiliary stirring mechanism is installed at the lower end of the drive shaft 7. The bottom stirring rod 8 of the auxiliary stirring mechanism is 350mm long and designed in an arc shape along the bottom of the mixing tank 1. The side stirring rod 9 is 800mm high and 10mm away from the side wall of the mixing tank 1. Three rubber scrapers 10 are provided on the lower part of the bottom stirring rod 8 and the outer side of the side stirring rod 9. The scrapers 10 fit tightly against the tank wall and bottom. The bottom stirring rod 8 is designed in an arc shape along the bottom of the tank, which can completely fit the curved surface of the bottom of the mixing tank 1, effectively turning over the nanofiller deposited at the bottom of the tank, avoiding uneven mixing problems, and ensuring that the materials are fully blended. The rubber material is soft and elastic, which can fit tightly against the tank wall and bottom, scraping off residual paint material. On the one hand, it avoids raw material waste, and on the other hand, it prevents residual material from falling off after drying and contaminating the next batch of paint, ensuring the purity of the paint. The rubber material will not scratch the stainless steel inner wall of the mixing tank, extending the service life of the equipment, while reducing the friction between the scraper and the tank wall, reducing energy consumption.

[0028] The raw materials for the water-based nano-ceramic coating, including modified silica sol, water-based organosilicon resin, nano-zirconia, nano-silica, nano-alumina, various additives, and deionized water, are added to the mixing tank 1 through the feed inlet 2. If the material quantity is large, occupying 40%-80% of the mixing tank volume, the telescopic rod 30 is extended, causing the upper agitator 14 to rise, separating the upper and lower agitators. The drive motor 27 is then started, and the drive shaft 7 drives the upper and lower agitators and auxiliary agitator mechanism to rotate. The upper agitator 14, located at a higher position within the mixing tank 1, agitates the material at a higher position, while the lower agitator 11, located at a lower position within the mixing tank 1, agitates the material at a lower position. Through the independent action of the high and low-position dual agitators, the entire mixing area is covered, avoiding dead zones caused by large material quantities. During the rotation of the upper agitator 14 and the lower agitator 11, the lower washing blade 22 and the upper washing blade 18 are respectively driven to rotate. The lower washing blade 22 has a convex lower end face and a structure that is low in the middle and high at the outer periphery. This shape design can generate a centripetal converging force when rotating, which not only generates a uniform downward thrust on the material at the higher position, but also guides the material to concentrate towards the center of the second receiving cavity 21, avoiding the material from spreading to the barrel wall and causing circulation failure. After this part of the material flows downward to the receiving cavity 17 of the lower agitator 11, the cavity structure of the receiving cavity 17 can play a guiding role, so that the material flows smoothly to the outer periphery after contacting the bottom of the cavity, avoiding material splashing or turbulence caused by direct impact. The rotating upper washing blades 18 then generate an upward thrust on the materials. The upper surface of the upper washing blades 18 is arc-shaped, and the inner height is lower than the outer height. This design utilizes the guiding effect of the arc-shaped surface to push the material flowing from the periphery upward. At the same time, several upper washing blades 18 are evenly distributed in a circumferential shape, which can form a stable upward airflow, ensuring that the material rises smoothly and covers a comprehensive area. After the material rises into the receiving cavity 21 of the upper stirring component 14, it is then pushed downward by the lower washing blades 22, forming a closed-loop flow between the high and low points.

[0029] If the material quantity is small, accounting for 20%-40% of the mixing tank volume, the telescopic rod 30 is retracted, causing the upper mixing component 14 to descend and fit against the lower mixing component. This prevents the material from adhering to the bottom and failing to participate in the mixing due to its small quantity, significantly improving the contact efficiency between the material and the mixing components. At this time, the lower end face of the upper mixing plate 19 fits against the upper end face of the lower mixing plate 15, forming a seal for the first and second receiving cavities 17 and 21. This sealing structure isolates the lower washing blade 22 and the upper washing blade 18 from the mixing area, preventing them from generating additional axial thrust when mixing a small amount of material, thereby preventing the material from forming turbulence in the limited space. Turbulence can prevent the material from being effectively sheared by the mixing blocks and may even exacerbate agglomeration. Therefore, this sealing design ensures the targeted and effective mixing by shielding the washing blades, allowing a small amount of material to achieve the same level of mixing uniformity as a large amount of material. The drive shaft 7 drives the upper stirring component 14 and the lower stirring component 11 to rotate synchronously. The lower stirring block 16 and the upper stirring block 20 are staggered to concentrate the stirring of a small amount of material, increase the stirring force, and ensure that the material is mixed evenly.

[0030] It achieves efficient adaptation to different material quantities, meeting the needs of mass production and small-batch trial production without the need for additional component replacement, thus improving the equipment's practicality and production flexibility.

[0031] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A device for preparing water-based nano-ceramic coatings for aluminum alloy wheel hubs, characterized in that, The device includes a mixing tank (1), a support sleeve (3), and a drive box (4). The support sleeve (3) is installed on the top of the mixing tank (1). A drive shaft (7) is installed inside the support sleeve (3). A rotating seat (6) is installed at the bottom of the mixing tank (1). The lower end of the drive shaft (7) is rotatably mounted on the rotating seat (6). A lower stirring component (11) is installed on the drive shaft (7). A lifting sleeve (12) is fitted around the outer periphery of the drive shaft (7). A rotating sleeve (13) is rotatably mounted at the bottom of the lifting sleeve (12). An upper stirring component (14) is connected to the lower end of the rotating sleeve (13). A linkage groove (25) is opened on the outer periphery of the drive shaft (7) along its axial direction. A linkage block (24) is connected inside the rotating sleeve (13). The linkage block (24) is set in the linkage groove (25) and can move along the linkage groove (25); it also includes a telescopic rod (30) installed on the support sleeve (3), the telescopic rod (30) drives the lifting sleeve (12); the drive box (4) includes a mounting box (32), a drive motor (27) is installed in the mounting box (32), the drive motor (27) drives the drive gear (28), the upper end of the drive shaft (7) passes through the support sleeve (3) and extends into the mounting box (32), the driven gear (26) is installed on the drive shaft (7), the lifting sleeve (12) has an opening (31) for the driven gear (26) to be exposed, and the drive gear (28) meshes with the driven gear (26).

2. The apparatus for preparing water-based nano-ceramic coatings for aluminum alloy wheel hubs according to claim 1, characterized in that, The lower stirring component (11) includes a lower stirring plate (15), and a plurality of vertically arranged lower stirring blocks (16) are evenly installed on the upper end surface of the lower stirring plate (15); the upper stirring component (14) includes an upper stirring plate (19), and a plurality of vertically arranged upper stirring blocks (20) are evenly installed on the lower end surface of the upper stirring plate (19); the outer periphery of the upper stirring plate (19) and the lower stirring plate (15) are respectively provided with notches (23) for the lower stirring blocks (16) and the upper stirring blocks (20) to pass through.

3. The apparatus for preparing water-based nano-ceramic coatings for aluminum alloy wheel hubs according to claim 2, characterized in that, When the upper stirring component (14) and the lower stirring component (11) are closed, the lower stirring block (16) and the upper stirring block (20) are relatively staggered.

4. The water-based nano-ceramic coating preparation device for aluminum alloy wheel hubs according to claim 2 or 3, wherein the upper stirring plate (19) has a second accommodating cavity (21) at its lower part, and a lower washing blade (22) is provided in the second accommodating cavity (21), wherein the lower end face of the lower washing blade (22) is convex.

5. The apparatus for preparing water-based nano-ceramic coatings for aluminum alloy wheel hubs according to claim 1, characterized in that, The lower stirring plate (15) has an upper cavity (17) and a number of upper washing blades (18) are installed at the bottom of the cavity (17). The upper surface of the upper washing blades (18) is arc-shaped, and the height of the inner side of the upper surface of the upper washing blades (18) is lower than the height of the outer side.

6. The apparatus for preparing water-based nano-ceramic coatings for aluminum alloy wheel hubs according to claim 1, characterized in that, It also includes an auxiliary stirring mechanism, which includes a bottom stirring rod (8) and a side stirring rod (9) connected to each other. One end of the bottom stirring rod (8) is fixedly connected to the outer periphery of the drive shaft (7), and the bottom stirring rod (8) is adapted to the bottom shape of the mixing tank (1). The side stirring rod (9) is connected to the end of the bottom stirring rod (8) away from the drive shaft (7), and the side stirring rod (9) is vertically arranged along the side wall of the mixing tank (1).

7. The apparatus for preparing water-based nano-ceramic coatings for aluminum alloy wheel hubs according to claim 6, characterized in that, Several scrapers (10) are provided on the lower part of the bottom stirring rod (8) and the outer side of the side stirring rod (9).

8. The apparatus for preparing water-based nano-ceramic coatings for aluminum alloy wheel hubs according to claim 1, characterized in that, The upper end of the lifting sleeve (12) extends out of the mounting box (32) and is fixedly connected to the support plate (29). The output end of the telescopic rod (30) is driven to connect with the support plate (29). The telescopic rod (30) drives the lifting sleeve (12) and the upper stirring component (14) to rise and fall synchronously through the telescopic rod (30).

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