Production process of low-gloss high-requirement fine sand grains

Abstract

The invention discloses a low-gloss high-requirement fine sand grain production process, which comprises a base, the top of the base is provided with a feeding bin, the top of the feeding bin is provided with a support, during use, raw materials are placed in a premixing bin, stirring blades are driven by a driving motor to stir at a low speed, material aggregation is avoided, a rotating motor is started to drive the premixing bin to turn over, and then the raw materials are fed into the premixing bin. A sealing plate is opened, materials fall and pass through a filter screen to be subjected to impurity removal, then a limiting rod is continuously pressed, the filter screen vertically vibrates in a reciprocating mode through the elastic force of a limiting spring, material accumulation and blockage are avoided, a weak shearing screw is driven by a power motor to conduct uniform feeding, and after the materials are fed to an ACM mill, fine grinding is conducted. And then the sand grains are conveyed into a bonding machine from a material guide hose, a powder accumulation prevention auxiliary agent is added, the linear speed of the bonding machine is adjusted to 27 m / s-30 m / s, high-speed stirring is conducted for 6 minutes, the sand grain gloss is reduced, then plate spraying operation of the fine sand grains is completed, and therefore the production technology of the low-gloss high-requirement fine sand grains is completed.

Description

Technical Field

[0001] This invention relates to the field of powder coating technology, specifically to a production process for low-gloss, high-requirement fine-textured coatings. Background Technology

[0002] Powder coatings, with their environmental compliance and comprehensive performance advantages, are gradually replacing traditional coating processes, especially in high-end manufacturing and green supply chains, where they have become the preferred technology. Our traditional thermos cup industry is also using powder coatings on a large scale. Due to the characteristics of the thermos cup industry, users prefer powder coatings with low gloss and fine sand texture. To solve the problems of low yield, low production capacity and insufficient surface fineness in existing technologies, we need a production process with low gloss and high requirements for fine sand texture.

[0003] The fine sand texture currently used requires a series of additives in the formula because the powder coating on thermos cups needs to be resistant to washing with various solvents. Most of these additives increase the reaction rate. In addition, the reaction rate of low-gloss sand texture is already very fast. If this type of powder is produced using conventional processes, it will easily char and fail to achieve the desired effect. Furthermore, the current industry production process for low-gloss sand texture is also prone to charring, resulting in large fluctuations in gloss and an insufficiently smooth surface, which is difficult for users to accept. Summary of the Invention

[0004] The purpose of this invention is to provide a production process for low-gloss, high-requirement fine-textured finishes to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The production process for low-gloss, high-requirement fine-textured finishes includes a base, a feeding hopper mounted on top of the base, a support mounted on top of the feeding hopper, a rotary motor mounted on the outer wall of the support, a premixing hopper mounted on the outer wall of the rotary motor, a sealing plate mounted on top of the premixing hopper, a drive motor mounted on the bottom of the premixing hopper, a stirring blade mounted on top of the drive motor, a filter screen mounted on the inner wall of the feeding hopper, a limit rod mounted on the outer wall of the filter screen, a limit spring mounted on the outer wall of the limit rod, a conveying hopper mounted at the bottom of the feeding hopper, a power motor mounted on the side wall of the conveying hopper, a weak-shear screw mounted on the side wall of the power motor, an ACM mill mounted on the side of the conveying hopper away from the power motor, a guide hose mounted at the bottom of the ACM mill, a bonding machine mounted on the side of the guide hose away from the ACM mill, a cover plate mounted on top of the bonding machine, a feeding hopper mounted on top of the cover plate, a drive motor mounted at the bottom of the bonding machine, and a paddle mounted on top of the drive motor.

[0007] Preferably, the sealing plate is connected to the flange of the premixed chamber, and the premixed chamber is connected to the support via a rotary motor to form a flipping structure.

[0008] Preferably, the filter screen is movably connected to the feed hopper, and the filter screen forms a telescopic structure with a limiting spring and a limiting rod.

[0009] Preferably, the outer diameter of the weak shear screw matches the inner diameter of the conveying chamber, and the rotational speed of the weak shear screw needs to be reduced by about 27-35.

[0010] Preferably, the main mill speed of the ACM mill is as high as possible, and the auxiliary mill speed needs to be adjusted to between 25 and 30. The auxiliary mill speed should also be adjusted according to the particle size distribution, and the median particle size is generally controlled between 23 and 27.

[0011] Preferably, the cover plate is tightly fitted to the bonding machine, and the blades are rotated with the bonding machine via a drive motor.

[0012] The production process for low-gloss, high-requirement fine-textured finishes includes the following steps:

[0013] S1. Place the raw materials into the premixing chamber, then seal the sealing plate, and at the same time start the drive motor to drive the stirring blade to rotate and stir at low speed to avoid material accumulation.

[0014] S2. After the materials are premixed, the premixing bin is rotated by starting the rotary motor, and then the sealing plate is opened so that the premixed materials can be directly fed into the feeding bin for rapid feeding.

[0015] S3. When the material enters the feed hopper, the filter screen can intercept large particles or aggregated material clumps. At the same time, pressing the limit rod continuously causes the filter screen to vibrate vertically through the elastic force of the limit spring, which accelerates the material feeding rate and prevents the material from accumulating and clogging on the surface of the filter screen.

[0016] S4. Then, the power motor is started to drive the weak shear screw for feeding. The weak shear screw reduces the shear force, reduces molecular chain breakage, and maintains the original molecular weight and structural integrity of the material. At the same time, although the shear force of the weak shear screw is low, it can still achieve stable material conveying and macroscopic mixing through the pushing of the screw channel and gentle stirring, resulting in higher conveying stability.

[0017] S5. Finally, after the material is conveyed to the ACM mill, it is finely ground by the built-in grinding rotor to achieve pulverization. Then, it is pressurized and conveyed to the bonding machine through the feed hose. Then, an anti-powder accumulation agent is added through the feeding hopper at a ratio of 1%-1.3%. Then, the linear speed of the bonding machine is adjusted to 27m / s-30m / s, and high-speed stirring is carried out for 6 minutes to reduce the gloss of the sand texture and improve the product quality. After the stirring is completed, the powder spraying plate is taken out to complete the fine sand texture production spraying plate operation.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The process involves placing raw materials into the premixing chamber via a base, feeding hopper, support, rotary motor, premixing hopper, sealing plate, drive motor, and stirring blades. The sealing plate is then used to seal the chamber, and the drive motor is activated to rotate the stirring blades at low speed. Since different materials may have different physical properties, directly feeding them into the main processing equipment can easily lead to insufficient mixing and fluctuations in product performance. By using the low-speed stirring and tumbling of the stirring blades, the materials are first macroscopically and uniformly dispersed to avoid material aggregation, laying the foundation for subsequent deep mixing or reaction. After the materials are premixed, the rotary motor is activated to rotate the premixing hopper, and then the sealing plate is opened, allowing the premixed materials to directly enter the feeding hopper, further improving feeding efficiency.

[0020] 2. By employing a filter screen, limiting rod, and limiting spring, when material enters the feed hopper, the filter screen can intercept large particles or aggregated material clumps. Simultaneously, continuous pressing of the limiting rod causes the limiting spring to vibrate the filter screen vertically, accelerating the material feeding rate. This vibration also prevents material from accumulating and clogging the filter screen surface. The filter screen improves material purity, preventing product performance defects caused by impurities when the material enters subsequent core equipment such as the bonding machine.

[0021] 3. The system employs a conveying bin, a power motor, and a low-shear screw. The power motor drives the low-shear screw for feeding. The low-shear screw features a large pitch, low compression ratio, and no strong shearing elements. For polymer materials or heat-sensitive materials, high shear can lead to molecular chain breakage, affecting the material's mechanical properties. The low-shear screw reduces shear force, minimizing molecular chain breakage and maintaining the original molecular weight and structural integrity of the material. Although the shear force is low, the low-shear screw can still achieve stable material conveying and macroscopic mixing through the pushing and gentle stirring of the screw channel, resulting in higher conveying stability.

[0022] 4. The process involves an ACM mill, feed hose, bonding machine, cover plate, feed hopper, drive motor, and paddles. After the material is fed into the ACM mill, it undergoes fine grinding by the built-in grinding rotor, thus achieving pulverization. Then, under pressure, it is conveyed from the feed hose to the bonding machine. Next, an anti-powdering agent is added at a ratio of 1%-1.3% through the feed hopper. The linear speed of the bonding machine is then adjusted to 27m / s-30m / s, and high-speed stirring is performed for 6 minutes. The addition of the anti-powdering agent reduces the glossiness of the surface, resulting in a product with a smooth surface to the touch. Due to the protective coating of anti-powdering agent wax powder, the resistance to solvent washing is also enhanced. Compared with conventional processes, it is less prone to coking, has higher production capacity, and a higher yield rate. Attached Figure Description

[0023] Figure 1 This is a front view structural schematic diagram of the production process for low-gloss, high-requirement fine sand texture of the present invention;

[0024] Figure 2 This is a side view of the production process for the low-gloss, high-requirement fine sand texture of the present invention.

[0025] Figure 3 This is a schematic cross-sectional view of the premixing chamber in the production process of the low-gloss, high-requirement fine sand texture of the present invention.

[0026] Figure 4 This is a schematic diagram showing the disassembled structure of the components surrounding the filter screen in the production process of the low-gloss, high-requirement fine sand texture of the present invention.

[0027] Figure 5 This is a schematic cross-sectional view of the internal structure of the conveyor chamber in the production process of the low-gloss, high-requirement fine sand texture of the present invention.

[0028] Figure 6 This is a schematic diagram showing the internal structure of the bonding machine used in the production process of low-gloss, high-requirement fine sand texture of the present invention.

[0029] In the diagram: 1. Base; 2. Feed hopper; 3. Support frame; 4. Rotary motor; 5. Premixing hopper; 6. Sealing plate; 7. Drive motor; 8. Mixing blade; 9. Filter screen; 10. Limiting rod; 11. Limiting spring; 12. Conveying hopper; 13. Power motor; 14. Weak shear screw; 15. ACM mill; 16. Feed hose; 17. Bonding machine; 18. Cover plate; 19. Feed hopper; 20. Drive motor; 21. Paddle. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1-6 This invention provides a production process technology solution for low-gloss, high-requirement fine sand texture:

[0032] The production process for a low-gloss, high-requirement fine-textured finish includes a base 1, a feeding hopper 2 mounted on top of the base 1, a support 3 mounted on top of the feeding hopper 2, a rotary motor 4 mounted on the outer wall of the support 3, a premixing hopper 5 mounted on the outer wall of the rotary motor 4, a sealing plate 6 mounted on top of the premixing hopper 5, a drive motor 7 mounted on the bottom of the premixing hopper 5, a stirring blade 8 mounted on top of the drive motor 7, a filter screen 9 mounted on the inner wall of the feeding hopper 2, a limit rod 10 mounted on the outer wall of the filter screen 9, a limit spring 11 mounted on the outer wall of the limit rod 10, and a bottom of the feeding hopper 2... The device includes a conveying chamber 12, a power motor 13 mounted on the side wall of the conveying chamber 12, a weak shear screw 14 mounted on the side wall of the power motor 13, an ACM mill 15 mounted on the side of the conveying chamber 12 away from the power motor 13, a guide hose 16 mounted on the bottom of the ACM mill 15, a bonding machine 17 mounted on the side of the guide hose 16 away from the ACM mill 15, a cover plate 18 mounted on the top of the bonding machine 17, a feeding hopper 19 mounted on the top of the cover plate 18, a drive motor 20 mounted on the bottom of the bonding machine 17, and a paddle 21 mounted on the top of the drive motor 20.

[0033] The sealing plate 6 is connected to the flange of the premixing chamber 5, and the premixing chamber 5 forms a flipping structure with the support 3 via the rotary motor 4.

[0034] The filter screen 9 is movably connected to the feed hopper 2, and the filter screen 9 forms a telescopic structure with the limit spring 11 and the limit rod 10.

[0035] The outer diameter of the weak shear screw 14 is matched with the inner diameter of the conveying chamber 12, and the rotational speed of the weak shear screw 14 needs to be reduced by about 27-35.

[0036] The ACM mill 15 has a main mill speed that should be as high as possible, while the auxiliary mill speed should be adjusted to between 25-30. The auxiliary mill speed should also be adjusted according to the particle size distribution, with the median particle size generally controlled between 23-27.

[0037] The cover plate 18 is tightly fitted to the bonding machine 17, and the blade 21 forms a rotating structure with the bonding machine 17 through the drive motor 20.

[0038] The production process for low-gloss, high-requirement fine-textured finishes includes the following steps:

[0039] S1. Place the raw materials into the premixing chamber 5, then seal the sealing plate 6, and at the same time start the drive motor 7 to drive the stirring blade 8 to rotate and stir at low speed to avoid material accumulation.

[0040] S2. After the material premixing is completed, the premixing chamber 5 is rotated by starting the rotary motor 4, and the sealing plate 6 is opened. The premixed material directly enters the feeding chamber 2 for rapid feeding.

[0041] S3. When the material enters the feed hopper 2, the filter screen 9 can intercept large particles or aggregated material clumps. At the same time, by continuously pressing the limit rod 10, the filter screen 9 will vibrate vertically through the elastic force of the limit spring 11, which will accelerate the material feeding rate and prevent the material from accumulating and clogging on the surface of the filter screen 9.

[0042] S4. Then, the power motor 13 drives the weak shear screw 14 to feed the material. The weak shear screw 14 reduces the shear force, reduces molecular chain breakage, and maintains the original molecular weight and structural integrity of the material. At the same time, although the shear force of the weak shear screw 14 is low, it can still achieve stable material conveying and macroscopic mixing through the pushing of the screw channel and gentle stirring, resulting in higher conveying stability.

[0043] S5. Finally, after the material is conveyed to the ACM mill 15, it is finely ground by the built-in grinding rotor to achieve pulverization. Then, it is pressurized and conveyed from the feed hose 16 to the bonding machine 17. Then, an anti-powder accumulation agent is added through the feeding hopper 19 at a ratio of 1%-1.3%. Then, the linear speed of the bonding machine 17 is adjusted to 27m / s-30m / s, and high-speed stirring is carried out for 6 minutes to reduce the gloss of the sand texture and improve the product quality. After the stirring is completed, the powder spraying plate is taken out to complete the fine sand texture production spraying plate operation.

[0044] It should be noted that this invention is a production process for low-gloss, high-requirement fine sand texture. In use, the raw materials are placed in the premixing chamber 5, and the stirring blades 8 are driven by the drive motor 7 to stir at low speed to prevent material aggregation. Then, the rotary motor 4 is started to rotate the premixing chamber 5 and open the sealing plate 6. The material falls through the filter screen 9 for impurity removal. The limit rod 10 is then continuously pressed, and the filter screen 9 vibrates vertically back and forth due to the elasticity of the limit spring 11, preventing material accumulation and blockage. The power motor 13 drives the weak-shear screw 14 for uniform feeding. After the material is fed to the ACM mill 15, it is finely ground and then conveyed through the guide hose 16 to the bonding machine 17. An anti-powder-accumulation additive is added, and the linear speed of the bonding machine 17 is adjusted to 27m / s-30m / s. High-speed stirring is performed for 6 minutes to reduce the sand texture gloss, and then the fine sand texture spraying operation is completed. This completes the production process for low-gloss, high-requirement fine sand texture.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production process for low-gloss, high-requirement fine-textured finishes, characterized by: The system includes a base (1), a feeding hopper (2) mounted on the top of the base (1), a support (3) mounted on the top of the feeding hopper (2), a rotary motor (4) mounted on the outer wall of the support (3), a premixing hopper (5) mounted on the outer wall of the rotary motor (4), a sealing plate (6) mounted on the top of the premixing hopper (5), a drive motor (7) mounted on the bottom of the premixing hopper (5), a stirring blade (8) mounted on the top of the drive motor (7), a filter screen (9) mounted on the inner wall of the feeding hopper (2), a limit rod (10) mounted on the outer wall of the filter screen (9), a limit spring (11) mounted on the outer wall of the limit rod (10), and a conveying hopper (…) mounted on the bottom of the feeding hopper (2). 12) A power motor (13) is installed on the side wall of the conveying bin (12), and a weak shear screw (14) is installed on the side wall of the power motor (13). An ACM mill (15) is installed on the side of the conveying bin (12) away from the power motor (13). A guide hose (16) is installed at the bottom of the ACM mill (15). A bonding machine (17) is installed on the side of the guide hose (16) away from the ACM mill (15). A cover plate (18) is installed on the top of the bonding machine (17). A feeding hopper (19) is installed on the top of the cover plate (18). A drive motor (20) is installed at the bottom of the bonding machine (17). A paddle (21) is installed on the top of the drive motor (20).

2. The production process for low-gloss, high-requirement fine-textured finishes according to claim 1, characterized in that: The sealing plate (6) is connected to the flange of the premixing chamber (5), and the premixing chamber (5) forms a flipping structure with the support (3) through the rotary motor (4).

3. The production process for low-gloss, high-requirement fine-textured finishes according to claim 1, characterized in that: The filter screen (9) is movably connected to the feed bin (2), and the filter screen (9) forms a telescopic structure with the limiting rod (10) through the limiting spring (11).

4. The production process for low-gloss, high-requirement fine-textured finishes according to claim 1, characterized in that: The outer diameter of the weak shear screw (14) matches the inner diameter of the conveying chamber (12), and the rotational speed of the weak shear screw (14) needs to be reduced by about 27-35.

5. The production process for low-gloss, high-requirement fine-textured finish according to claim 1, characterized in that: The main mill speed of the ACM mill (15) should be as high as possible, and the auxiliary mill speed should be adjusted to between 25-30. The auxiliary mill speed should also be adjusted according to the particle size distribution. Generally, the median particle size should be controlled between 23-27.

6. The production process for low-gloss, high-requirement fine-textured finishes according to claim 1, characterized in that: The cover plate (18) is tightly fitted to the bonding machine (17), and the blade (21) forms a rotating structure with the bonding machine (17) through the drive motor (20).

7. The production process for low-gloss, high-requirement fine-textured finishes is characterized by: Includes the following steps: S1. Place the raw materials into the premix bin (5), then seal the sealing plate (6), and start the drive motor (7) to drive the stirring blade (8) to rotate and stir at low speed to avoid material accumulation. S2. After the material is premixed, the premixing bin (5) is turned over by starting the rotary motor (4), and the sealing plate (6) is opened. The premixed material is directly fed into the feeding bin (2) for rapid feeding. S3. When the material enters the feed hopper (2), the filter screen (9) can intercept large particles or aggregated material clumps. At the same time, the limit rod (10) is pressed continuously, and the filter screen (9) vibrates vertically through the elastic force of the limit spring (11), which speeds up the material feeding rate and prevents the material from accumulating and clogging on the surface of the filter screen (9). S4. Then, the power motor (13) is started to drive the weak shear screw (14) to feed the material. The weak shear screw (14) reduces the shear force, reduces molecular chain breakage, and maintains the original molecular weight and structural integrity of the material. At the same time, although the shear force of the weak shear screw (14) is low, it can still achieve stable material conveying and macroscopic mixing through the push of the screw groove and gentle stirring, resulting in higher conveying stability. S5. Finally, after the material is conveyed to the ACM mill (15), it is finely ground by the built-in grinding rotor to achieve pulverization. Then, it is pressurized and conveyed from the feed hose (16) to the bonding machine (17). Then, the anti-powdering agent is added through the feeding hopper (19) at a ratio of 1%-1.3%. Then, the linear speed of the bonding machine (17) is adjusted to 27m / s-30m / s and high-speed stirring is performed for 6 minutes to reduce the gloss of the sand texture and improve the product quality. After the stirring is completed, the powder spraying plate is taken out to complete the fine sand texture production spraying plate operation.

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