Preparation equipment and process of antibacterial antiseptic powder coating

Abstract

The present application relates to the technical field of powder coating, in particular to a preparation process of antibacterial and anticorrosive powder coating, comprising: S1, mixing raw materials: using a mixing tank to uniformly mix raw materials such as epoxy resin, hardener and additive; S2, mixing and melting raw materials: putting the uniformly mixed raw materials into a screw extruder for melting; S3, cutting: using a cutter to cut the raw materials extruded by the screw extruder to obtain flaky granular materials; S4, powdering: using a cyclone pulverizer to grind and refine the flaky granular materials; and S5, screening: using an ultrasonic vibration screen to screen the powder materials produced by the cyclone pulverizer. The present application optimizes and improves the screening process, improves the screening stability of the coating powder, thereby improving the particle size consistency of the coating powder, and further improving the product quality of the antibacterial and anticorrosive powder coating preparation process. On the other hand, the present application also provides an antibacterial and anticorrosive powder coating preparation equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of powder coating technology, in particular to a kind of antibacterial anticorrosive powder coating preparation equipment and process. BACKGROUND

[0002] Antibacterial anticorrosive powder coating is mainly realized by physical shielding to achieve the antibacterial anticorrosive protection of materials, the benzene ring and ether bond in the molecular structure of epoxy resin make epoxy resin have excellent antibacterial and corrosion resistance, the epoxy group and fatty chain light group in the molecular structure of epoxy resin contain high polarity, can react with the free bond on the metal surface to form chemical bond, thus having firm adhesion, at the same time, intermolecular force is generated, and then epoxy resin has good mechanical properties, so epoxy resin powder is a kind of powder coating commonly used in antibacterial anticorrosion in industry.

[0003] The preparation process of epoxy powder coating is generally to mix epoxy resin, hardener, additive and other raw materials uniformly by using mixing tank, stirrer and other mixing equipment, put the uniformly mixed raw materials into spiral extruder and other melting equipment, then cool the mixed flaky material extruded by spiral extruder, and send it into ball mill, cyclone crusher and other grinding equipment to grind and refine the flaky material, screen the coating powder after grinding and refining by ultrasonic vibration screen and other powder screening equipment, and then the preparation process is completed, and then the product is packaged, transported and stored for subsequent process treatment.

[0004] The particle size of epoxy powder is directly related to the final coating effect: if the particle size is too large, it cannot be uniformly coated on the surface of the coated object, causing visible unevenness; and if the particle size is too small, it will cause insufficient adhesion, unstable coating quality and other problems. The particle size tolerance of epoxy powder also has a significant impact on the surface smoothness and surface consistency of the coating: if the particle size tolerance exceeds the set value, it will cause the thickness and surface roughness of the coating to be inconsistent, affecting the quality of the final coating. The link that most affects the particle size and tolerance of epoxy powder in the preparation process of epoxy powder is the screening link of the coating powder after grinding and refining by powder screening equipment, and the mesh number and aperture of the screen will directly control the particle size and tolerance.

[0005] The traditional ultrasonic vibrating screen screen is mostly a metal wire woven screen, which has poor rigidity and poor bending resistance. In actual use, the screen will collapse downward under the gravity of the screened material, and then form a pore size deviation in the middle and edge of the screen, that is, the flat screen hole becomes a curved screen hole, the vertical projection area of the screen hole in the middle of the screen is reduced, and the particle size of the material screened in the middle and edge of the screen is different, which easily leads to the particle size and tolerance of the overall coating powder being out of tolerance. Since the vertical projection area of the screen hole in the middle of the screen is reduced, the screened material is also prone to accumulate on the screen area that collapses downward and has a reduced vertical projection area, thereby causing the screen to be blocked, affecting production efficiency, further, the accumulated material in the middle of the screen causes the load on the screen to be uneven, and a large internal stress is generated in the center of the screen and the edge of the screen during vibration operation, thereby reducing the service life of the screen, and further, the kinetic energy of the center of the screen is large due to the accumulation of material during vibration operation, which continuously pulls the metal wire to cause deformation of the metal wire, thereby causing the screen hole to become larger, and further causing the particle size and tolerance of the coating powder to be out of tolerance.

[0006] Since the mesh number of the epoxy powder screen is about 180 meshes, it is difficult to identify the screened product with the naked eye, and it is necessary to use complex and time-consuming detection methods such as screening or pasting to check the screen after the equipment is stopped, or to use visual inspection method to observe the screen with the naked eye during the equipment pause gap to check whether the screen color, shape, overall structure, etc. are deformed, cracked, broken, etc. Regardless of which method, the operator needs to have a certain operation proficiency, which increases the labor cost and time cost, and further increases the preparation period and production cost of the epoxy powder.

[0007] In addition to increasing the detection frequency, another improvement scheme is to replace the metal wire woven screen with a stainless steel laser perforated screen. The stainless steel laser perforated screen has good rigidity and strong bending resistance, and the screen hole diameter size will not be affected by vibration fatigue stress, but in actual use, on the one hand, the manufacturing difficulty of large-area whole stainless steel laser perforated screen is high, the manufacturing cost is high, and the manufacturing material of large-area whole stainless steel laser perforated screen is fragile and is more prone to damage in use, especially under high load and large amplitude conditions, which is prone to fatigue, cracking, etc. The repair cost of the damaged large-area whole stainless steel laser perforated screen is high, the repair period is long, the overall practicability is not high, and the preparation period and production cost of the epoxy powder are increased.

[0008] Therefore, an antibacterial and anticorrosive powder coating preparation equipment and process are provided, which optimizes and improves the screening equipment in the preparation process, improves the screening stability and consistency of the coating powder, thereby improving the particle size consistency of the coating powder, and further improving the product quality of the antibacterial and anticorrosive powder coating preparation process. SUMMARY

[0009] The application provides an antibacterial and antiseptic powder coating preparation equipment and a process thereof, and the screening process of the antibacterial and antiseptic powder coating preparation process is optimized and improved to obtain higher uniformity of the coating powder particles, improve the screening consistency and use stability of the antibacterial and antiseptic coating powder in the screening process, and further improve the product quality of the antibacterial and antiseptic powder coating preparation process.

[0010] To achieve the above-mentioned purpose, in one aspect, the application provides an antibacterial and antiseptic powder coating preparation equipment, which comprises a machine body, an ultrasonic generator, a resonator, a rotor, a screen, a feeding pipe, a receiving cylinder, and a coarse particle opening.

[0011] The screen comprises a plurality of stainless steel laser-perforated sub-screens and a fixing frame, the fixing frame comprises a vertically placed fixing rod and a plurality of mounting rods horizontally connected to the fixing rod, the plurality of mounting rods are circumferentially arranged around the axis of the fixing rod, one sub-screen is connected between every two mounting rods through interference, the receiving cylinder is provided with a plurality of coarse particle openings corresponding to the discharge directions of the sub-screens, the coarse particle openings are communicated with the screen, and the plurality of sub-screens and the mounting rods are interfered with each other to form the entire screen.

[0012] Compared to wire mesh screens, stainless steel laser-perforated screens offer better overall rigidity and stronger flexural resistance. The screen aperture diameter is not affected by the fatigue stress generated by the high-frequency vibration of ultrasonic vibrating screens. However, large-area integral stainless steel laser-perforated screens are typically made with a material thickness of less than 2mm, resulting in a larger width-to-thickness ratio. Compared to wire mesh screens, their energy absorption and buffering effects are inferior. Consequently, they are more susceptible to overloaded external stresses during use, which can then be transferred to damage the internal screen aperture structure. This is especially true under high load and large amplitude conditions, leading to stress concentration and increased likelihood of fatigue cracking between the screen apertures. Furthermore, integral stainless steel laser-perforated screens exhibit... After damage, the entire stainless steel laser-perforated screen needs to be disassembled, and the damaged areas repaired by welding. During installation and disassembly, the large width and thickness of the screen generate significant torque, which can easily lead to excessive local torque within the screen. This stress concentration can exacerbate damage or even cause complete breakage. Repairing large areas of the entire stainless steel laser-perforated screen requires extra care and a high level of operator skill, resulting in higher repair costs and a longer repair cycle. Damage to the entire stainless steel laser-perforated screen during use significantly increases the preparation cycle and production cost of antibacterial and anti-corrosion powder. Multiple coarse-particle openings should be provided, arranged diagonally downwards and corresponding to the sub-screens, separated by mounting rods. These sub-screens can be considered independently operating screening units. When material undergoes an outward spiral motion and contacts the mounting rods, the rods can block a large amount of material from further movement and guide the material colliding with them.

[0013] Setting multiple coarse particle inlets can further improve the discharge efficiency of coarse particles that cannot pass through the screen, reduce the residence time of coarse particles on the sub-screen, thereby reducing the load on the sub-screen, thus improving the service life and reliability of the screen, and ultimately improving the production efficiency and product consistency of antibacterial and anti-corrosion powder.

[0014] The fixing frame serves to fix and connect the subnets, and also provides structural support for the overall structure composed of the subnets. It is mostly made of metal. The vertically placed fixing rod and multiple mounting rods evenly distributed around the axis of the fixing rod form a spatial frame structure with a plane and a vertical support axis. Compared with the planar stiffener splicing structure, it has stronger resistance to torsion and deformation. The mounting rods are connected to the subnets through interference fit. Compared with the most common bolt fixing, the friction between the fixing frame and the subnet achieves fastening. The interference fit can better reduce loosening and vibration. In the high-frequency vibration environment of the ultrasonic vibrating screen, the interference fit is not easy to loosen, thereby improving the strength and stability of the connection. At the same time, the interference fit does not require drilling. In the high-frequency vibration environment of the ultrasonic vibrating screen, there will be no stress concentration and damage due to the threaded holes of bolt fixing.

[0015] Due to the same area and thickness of the metal wire, the stainless steel laser opening screen is heavier, and a more powerful ultrasonic generator and resonator are needed. In order to save power consumption and reduce production cost, the selection principle of the screen is light weight and high strength. The preferred fixed rod and mounting rod are made of 2024 aluminum alloy material. 2024 aluminum alloy belongs to aluminum-copper-magnesium alloy, which has high strength, good toughness and wear resistance. Compared with steel, copper and other metal materials, 2024 aluminum alloy has lighter weight and better strength under the same volume and mass. The fatigue resistance of 2024 aluminum alloy is much higher than that of steel under the working condition of high-frequency vibration of ultrasonic vibration screen. The use of 2024 aluminum alloy material can further improve the practicality and reliability of the ultrasonic vibration screen, thereby improving the production efficiency and particle size consistency of the antibacterial and corrosion-resistant powder production process.

[0016] The umbrella-shaped elastic plate is fixedly installed on the fixed rod for evenly distributing the impact force of the screen. The umbrella-shaped elastic plate is made of elastic material, and the overall thickness of the umbrella-shaped elastic plate is 1-2mm. A locking device is arranged above the connection point of the fixed rod and the mounting rod. The locking device is used to fix the umbrella-shaped elastic plate on the fixed rod. A plurality of mesh holes are evenly arranged on the screen. A plurality of openings with the same aperture as the mesh holes are evenly arranged on the umbrella-shaped elastic plate, and the vertical projection of the opening on the screen completely coincides with the corresponding mesh hole at the bottom end. A plurality of through grooves corresponding to the mounting rods are evenly arranged on the umbrella-shaped elastic plate, and the vertical projection of the through groove on the screen completely coincides with the corresponding through groove.

[0017] The locking device can be a bolt that fixes and locks the umbrella-shaped elastic plate on the fixed rod. This scheme has simple structure and low cost, but stress concentration is easy to occur at the threaded hole, and the threaded connection is easy to be damaged by high-frequency vibration of the ultrasonic vibration screen. A rotating cam expansion interference extrusion seat adjustment locking structure similar to a bicycle can also be used. The umbrella-shaped elastic plate can also be fixed on a cylindrical member by welding or integral sheet metal. Threaded holes are formed in the cylindrical member, and rubber film lock bolts are screwed into the threaded holes or Loctite lock washers are arranged on the contact surface between the threaded hole and the cylindrical member. The pressure of the bolt on the fixed rod realizes the friction fixation of the cylindrical member, i.e. the umbrella-shaped elastic plate, on the fixed rod.

[0018] The umbrella-shaped elastic plate is set to uniformly disperse the impact of the material delivery pipe on the sub-screen when delivering material to the sub-screen, so as to prolong the service life of the sub-screen. The umbrella-shaped elastic plate is provided with an opening with the same aperture as that of the sub-screen, so as to reduce the material receiving area of the umbrella-shaped elastic plate, reduce the impact of the delivered material on the umbrella-shaped elastic plate, and further prolong the service life of the umbrella-shaped elastic plate. The umbrella-shaped elastic plate is preferably made of an elastic material, such as SWOSC-V steel strip spring steel or SUP12V steel strip spring steel. Both of the steel strip spring steels have good fatigue strength, especially good fatigue resistance under high-frequency reciprocating stress. The overall thickness of the umbrella-shaped elastic plate should be set to between 1 and 2 mm. If the thickness is too thin, cracks may occur during bending. If the thickness is too thick, the stiffness coefficient is too large, and the function of dispersing the impact of the material delivery pipe on the sub-screen when delivering material to the sub-screen is lost. A through groove with the same width as the mounting rod is provided on each vertical projection surface of the mounting rod. The through groove improves the movement freedom of the umbrella-shaped elastic plate, further increases the performance of the umbrella-shaped elastic plate in dispersing the impact of the material delivery pipe on the sub-screen when delivering material to the sub-screen, and positions the through groove and the mounting rod to make most of the material passing through the through groove fall on the mounting rod which has good rigidity and strength, thereby reducing the impact of the material on the sub-screen. At the same time, the through groove divides the umbrella-shaped elastic plate into multiple units, reduces the production difficulty and manufacturing cost of the umbrella-shaped elastic plate, improves the practicability and reliability of the ultrasonic vibrating screen, and further improves the production efficiency and particle size consistency of the antibacterial and anticorrosive powder.

[0019] Each of the mounting rods is a spiral shape diverging outward from the center of the screen, the spiral shape is the same as the movement trajectory of the material on the screen, the axis of the coarse particle outlet is parallel to the axis of the corresponding mounting rod of the sub-screen, and the projection line of the coarse particle outlet in the plane of the sub-screen is the same as the movement trajectory of the material on the screen. The spiral mounting rod can further improve the discharge efficiency of coarse particles that cannot pass through the screen, reduce the residence time of coarse particles on the sub-screen, thereby reducing the load on the sub-screen, improving the service life and reliability of the screen, and further improving the production efficiency and product consistency of the antibacterial and anticorrosive powder.

[0020] The screen mesh of the ultrasonic vibrating screen is not only vibrated vertically or horizontally, but also vibrated vertically and horizontally simultaneously. Due to the extremely high vibration frequency, the direction and size of the vibration force on the granular material on the screen mesh are constantly changing, thereby causing the screened material to constantly roll and collide. At this time, the screened material is also subjected to the action of gravity, and under the combined action of the vibration force and gravity, moves along a spiral outward expanding trajectory. Each of the mounting rods is a spiral shape diverging outward with the center of the screen mesh as the center. On the one hand, the mounting rod curve profile can further guide the screened material that hits the mounting rod, reduce the impact force, improve the kinetic energy of the material to maintain the screening capacity of the material, and improve the screening performance of the sub-mesh on the material. On the other hand, the mounting rod is a spiral shape diverging outward with the center of the screen mesh as the center, which reduces the bending moment generated by the impact energy of the ultrasonic vibrating screen on the mounting rod, reduces the elastic and plastic deformation of the mounting rod caused by the impact energy of the vibrating screen, thereby improving the strength of the interference fit between the mounting rod and the sub-mesh, preventing the mounting rod and the sub-mesh from falling off, thereby improving the service life and reliability of the screen mesh, and further improving the production efficiency and particle size consistency of the antibacterial and corrosion-resistant powder. For the convenience of making the mounting rod, the mounting rod can be regarded as an Archimedes spiral.

[0021] Each of the mounting rods is provided with a mounting groove on both horizontal sides for connecting with the sub-mesh. The mounting groove is tapered, and the sub-mesh is gap-fitted with the tapered mounting groove in the thickness direction. A wear-resistant glue coating is provided on the non-vertical surface of the sub-mesh and the mounting groove for interference fitting of the sub-mesh and the mounting groove. The wear-resistant glue coating is made of polyurethane or silicone rubber.

[0022] In addition to facilitating positioning and installation, the tapered mounting groove can prevent the sub-mesh and the mounting rod from falling off under the high-frequency vibration of the ultrasonic vibrating screen, further improving the connection strength of the interference fit between the sub-mesh and the mounting rod in the thickness direction of the sub-mesh. The wear-resistant glue coating can reduce the friction and impact between the sub-mesh and the mounting groove under the high-frequency vibration of the ultrasonic vibrating screen, avoid thermal deformation and material wear caused by high-frequency friction between the sub-mesh and the mounting groove, and prevent metal powder from falling into the material to pollute the screened material. The wear-resistant glue coating can be preferably made of polyurethane or silicone rubber, both of which have high strength, excellent wear resistance and chemical stability, good adhesion and are not easy to peel off, and silicone rubber has better thermal stability.

[0023] The mounting rods are hingedly connected to the fixed rod. The hinging axes of the mounting rods and the fixed rod are parallel to the fixed rod, and the rotatable angle range of the hinging point is 5-15 degrees. Each of the mounting rods is provided with an anti-disengagement portion on the side away from the fixed rod to prevent the sub-mesh from disengaging in the radial direction.

[0024] Compared to common connections used in screen frame structures such as welding, riveting, and anti-loosening bolts, the hinged connection of the fixing rod and the mounting rod allows for a certain degree of planar mobility, making it easier to assemble and disassemble the sub-screen. At the same time, the mobility of the hinge point further reduces the elastic and plastic deformation of the mounting rod caused by the impact energy generated by the vibrating screen, thereby improving the strength of the interference fit between the mounting rod and the sub-screen and preventing the mounting rod from falling off. The hinge point can rotate at an angle of 5-15 degrees, which ensures both installation strength and facilitates the fixation of the sub-screen after installation.

[0025] The anti-detachment part includes mounting holes at the ends of each mounting rod furthest from the fixed rod, connecting to the mounting grooves on both sides. Expansion screws that mate with the sub-nets on both sides of the mounting groove are installed within the mounting holes. Each sub-net has an arc-shaped notch for tenon-and-mortise engagement with the expansion screw. Multiple sub-nets and mounting rods are interlocked to form the entire screen. After the expansion screws are driven into the mounting holes, they compress the arc-shaped notches on both sides of the sub-nets. The arc-shaped notches provide a locking force, preventing the sub-nets from loosening and detaching radially. Compared to triangular or rectangular notches, the arc-shaped notches reduce stress concentration at the corner joints, further strengthening the interlocking strength between the multiple sub-nets and the mounting rods. Simultaneously, when the sub-nets are assembled as a whole and not installed into the ultrasonic vibrating screen, the lack of fixing by the inner wall of the ultrasonic vibrating screen makes the screen prone to deformation and detachment under impact in the thickness direction. The expansion screws further improve the practicality and reliability of the ultrasonic vibrating screen, thereby increasing the production efficiency and particle size consistency of the antibacterial and anti-corrosion powder. The anti-detachment part can also be configured such that the screen has a fixing hole at the contact position with the mounting groove, and bolts that penetrate the width direction of the mounting groove are used for clearance fit or overfit to prevent the sub-screen from detaching radially.

[0026] On the other hand, the present invention provides a process for preparing an antibacterial and anti-corrosion powder coating, wherein the process uses the above-mentioned method for preparing an antibacterial and anti-corrosion powder coating and includes the following steps:

[0027] S1 Raw Material Mixing: Epoxy resin, hardener, additives and other raw materials are mixed in a set ratio. The mixed raw materials are put into the mixing tank and the mixing tank mixes the epoxy resin, hardener, additives and other raw materials evenly.

[0028] S2 Raw Material Mixing: The uniformly mixed raw materials in the mixing tank are discharged into the screw extruder, and after heating, the screw extruder extrudes the molten raw materials.

[0029] S3 pelletizing: The molten raw material extruded from the screw extruder is cooled and hardened using a cooling device, and the cooled and hardened raw material is cut with a continuous cutter to obtain granular material;

[0030] S4 milling: the conveying belt moves the flaky material to the cyclone crusher, which grinds and refines the flaky material to obtain powder material;

[0031] S5 screening: the powder material is sent into the ultrasonic vibrating screen using the pneumatic conveyor, the material is guided vertically downward to the umbrella-shaped elastic plate, the screen mesh is vibrated by the ultrasonic generator and resonator, and the powder material on the screen mesh is excited, the material with a diameter smaller than the screen hole falls into the qualified product area below the ultrasonic vibrating screen, and the material with a diameter larger than the screen hole is discharged from the ultrasonic vibrating screen through the coarse particle port; the screen mesh includes three sub-meshes, and the umbrella-shaped elastic plate is equally divided by three through grooves, the sub-meshes and the through grooves are arranged in three, on the one hand, it can avoid the poor strength after installation due to the too many equal parts of the screen mesh and the umbrella-shaped elastic plate, on the other hand, it can also reduce the strength and time of manual assembly of the sub-meshes, and has good practical effect;

[0032] S6 packaging: the packing machine automatically packs and seals the powder material in the qualified product area of the ultrasonic vibrating screen.

[0033] Compared with the prior art, the present application has the following advantages:

[0034] 1. By optimizing the screening process in the preparation process of the antibacterial and anticorrosive powder coating, the screening consistency and stability of the antibacterial and anticorrosive coating powder are improved, and the product quality of the antibacterial and anticorrosive powder coating preparation process is improved, specifically, by setting the combined stainless steel laser perforated screen mesh in the ultrasonic vibrating screen, the practicability and reliability of the stainless steel laser perforated screen mesh are improved by utilizing the characteristics of the interference connection of multiple sub-meshes, thereby improving the screening consistency of the coating powder, the antibacterial and anticorrosive coating powder particle size consistency is improved, and the product quality of the antibacterial and anticorrosive powder coating preparation process is improved.

[0035] 2. By arranging the umbrella-shaped elastic plate above the combined stainless steel laser perforated screen mesh and cooperating with the combined stainless steel laser perforated screen mesh, the impact force on the combined stainless steel laser perforated screen mesh is reduced by utilizing the principle of absorbing the impact force of the material to be screened by the umbrella-shaped elastic plate through deformation, the stress condition and screening performance of the combined stainless steel laser perforated screen mesh are optimized, the stability and reliability of the stainless steel laser perforated screen mesh in the ultrasonic vibrating screen are further improved, and the production stability of the antibacterial and anticorrosive powder coating production process is improved, thereby improving the product quality and production efficiency of the antibacterial and anticorrosive powder coating preparation process.

[0036] 3. By setting the spiral reinforcing structure same as the material movement track on the screen in the combined stainless steel laser opening screen, the kinetic energy of the material to be screened is improved, so as to maintain the screening capacity of the material to be screened, meanwhile, the spiral reinforcing structure can reduce the bending moment generated by the impact energy on the combined stainless steel laser opening screen in the vibration process of the ultrasonic vibration screen, reduce the elastic deformation and plastic deformation of the combined stainless steel laser opening screen after being impacted by vibration, further improve the reliability and stability of the stainless steel laser opening screen in the ultrasonic vibration screen, and further improve the product quality and stability of the antibacterial and anticorrosive powder coating preparation process. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0038] Figure 2 It is an enlarged view of A of Figure 1

[0039] Figure 3 It is a schematic diagram of the flow of the material to be screened of the present application;

[0040] Figure 4 It is a schematic diagram of the top view structure of the present application;

[0041] Figure 5 It is a B-B sectional view of Figure 4

[0042] Figure 6 It is a schematic diagram of the cooperation of the fixed rod and the mounting rod structure (without installing the sub-screen);

[0043] Figure 7 It is a schematic diagram of the cooperation of the fixed rod, the mounting rod and the umbrella-shaped elastic plate structure (without installing the sub-screen);

[0044] Figure 8 It is a schematic diagram of the cooperation of the mounting rod, the expansion screw and the sub-screen structure.

[0045] In the figure: 1, machine body; 2, screen; 3, feeding pipe; 4, coarse particle port; 5, fixed rod; 6, mounting rod; 7, sub-screen; 8, umbrella-shaped elastic plate; 9, through groove; 10, mounting groove; 11, wear-resistant glue coating; 12, mounting hole; 13, expansion screw; 14, mesh; 15, opening; 16, arc-shaped notch; 17, cylindrical part; 18, threaded hole; 19, check bolt. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application.

[0047] ​​For the convenience of understanding the overall scheme and the readability of the drawings, the screen mesh structure of the screen 2 in the drawings is not fully drawn, but only partially drawn schematically. Please refer to Figures 1 to 8 The application provides an antibacterial and anticorrosive powder coating preparation device and process, and a technical scheme is as follows:

[0048] An antibacterial and anticorrosive powder coating preparation process comprises the following steps: S1, mixing raw materials: raw materials such as epoxy resin, hardener and additive are proportioned according to a set ratio, and the proportioned raw materials are put into a mixing tank, and the mixing tank uniformly mixes the raw materials such as epoxy resin, hardener and additive.

[0049] S2, melting and mixing raw materials: the uniformly mixed raw materials in the mixing tank are guided out to a screw extruder, the screw extruder extrudes the raw materials in a molten state after heating, so that different components can be fully mixed, and the quality stability of the final product is ensured.

[0050] S3, granulation: a cooling device is used to cool and harden the molten raw materials extruded by the screw extruder, a continuous cutter is used to cut the cooled and hardened raw materials to obtain granular materials, and the width and speed of the cutter are adjusted to control the particle size and tolerance range, thereby facilitating the subsequent process steps.

[0051] S4, powdering: a conveying belt moves the granular materials to a cyclone crusher, the cyclone crusher grinds and refines the granular materials to obtain powder materials, and the powder materials have improved coating property, adhesion and wear resistance.

[0052] S5, screening: a pneumatic conveyor is used to send the powder materials into an ultrasonic vibrating screen, the materials are guided vertically downward to umbrella-shaped elastic plates 8, an ultrasonic generator and a resonator jointly vibrate a screen mesh 2, and then the powder materials on the screen mesh 2 are excited, the materials with a diameter smaller than the screen mesh fall into a qualified product area below the ultrasonic vibrating screen, and the materials with a diameter larger than the screen mesh are discharged from the ultrasonic vibrating screen through a coarse particle port 4, so as to ensure the quality and consistency of the final powder.

[0053] The screen mesh 2 comprises three sub-meshes 7, and the umbrella-shaped elastic plates 8 are equally divided by three through grooves 9, the sub-meshes 7 and the through grooves 9 are arranged in three, on the one hand, the strength after installation can be avoided to be poor due to too many equal parts of the screen mesh 2 and the umbrella-shaped elastic plates 8, and on the other hand, the strength and time consumption during manual assembly of the sub-meshes 7 can be reduced, and the practical effect is good;

[0054] The ultrasonic vibrating screen comprises a machine body 1, an ultrasonic generator (not shown in the figure), a resonator (not shown in the figure), a rotor (not shown in the figure), a screen mesh 2, a feeding pipe 3, a material collecting cylinder (not shown in the figure) and a coarse particle port 4.

[0055] S6, packaging: a packaging machine automatically packs and seals the powder materials in the qualified product area of the ultrasonic vibrating screen.

[0056] The application further provides a preparation device for an antibacterial and antiseptic powder coating preparation process, in particular a screening device, wherein an ultrasonic generator is fixedly installed on a cylindrical body 1, the ultrasonic generator is connected with a resonator movably installed on the body 1, a rotor is installed on the resonator, and a screen 2 is arranged above the rotor, the screen 2 comprises a plurality of stainless steel laser-perforated sub-screens 7 and a fixing frame, the fixing frame comprises a fixing rod 5 arranged vertically and a plurality of mounting rods 6 connected horizontally on the fixing rod 5, the mounting rods 6 are arranged in a circumferential direction of the fixing rod 5, and one sub-screen 7 is connected between every two mounting rods 6 through interference, and a plurality of coarse particle outlets 4 corresponding to the sub-screens 7 in a discharging direction are arranged on a collecting cylinder, and the coarse particle outlets 4 are communicated with the screen 2.

[0057] In particular, the sub-screens 7 can be made of 2mm-thick 304 stainless steel cut into single sub-screen 7 shapes and then laser-perforated, or a whole 2mm-thick 304 stainless steel circular plate is laser-perforated and then cut into a plurality of sub-screen 7 shapes, and it should be noted that the mounting surface of the sub-screens 7 in contact with the mounting rods 6 needs to be polished and ground to avoid burrs and edges on the mounting surface of the sub-screens 7 in contact with the mounting rods 6, which can damage the mounting rods 6 made of 2024 aluminum alloy.

[0058] The fixing rod 5 can be made by casting or milling, and the rod body of the mounting rod 6 is made by cutting mounting grooves 10 and mounting holes 12 on both sides of a whole aluminum straight rod and then bending the straight rod.

[0059] Each mounting rod 6 is in a spiral shape diverging outward with the center of the screen 2 as a center, and the spiral shape is the same as the movement track of the material on the screen 2, the axis direction of the coarse particle outlet 4 is parallel to the axis of the adjacent mounting rod 6, the coarse particle outlet 4 should be arranged in multiple, and arranged correspondingly with the sub-screens 7 obliquely downward with the separation of the mounting rods 6, the plurality of sub-screens 7 can be regarded as independent screening units, after the material makes spiral movement outward and contacts the mounting rod 6, the mounting rod 6 can block a large amount of material from further movement, and at the same time, the mounting rod 6 can guide the material to be screened that collides with the mounting rod 6, the plurality of coarse particle outlets 4 can further improve the discharge efficiency of the coarse particles that cannot pass through the screen, reduce the residence time of the coarse particles on the sub-screens 7, and then reduce the load on the sub-screens 7, and then improve the service life and reliability of the screen 2, and then improve the production efficiency of the antibacterial and antiseptic powder and the product consistency.

[0060] The fixed rod 5 is fixedly installed with umbrella-shaped elastic plates 8 for evenly distributing the impact force on the sub-net 7. The umbrella-shaped elastic plates 8 are made of elastic material, and the overall thickness of the umbrella-shaped elastic plates 8 is 1-2 mm. The sub-net 7 is uniformly provided with a plurality of mesh holes 14. The umbrella-shaped elastic plates 8 are uniformly provided with a plurality of openings 15 with the same aperture as the mesh holes 14, and the vertical projection of the opening 15 on the sub-net 7 completely coincides with the corresponding mesh hole 14 at the bottom end. The umbrella-shaped elastic plates 8 are uniformly provided with through-slots 9 corresponding to the mounting rods 6, and the vertical projection of the through-slot 9 on the sub-net 7 completely coincides with the corresponding through-slot 9. The umbrella-shaped elastic plates 8 can be made of a whole body of a fan-shaped plate SWOSC-V steel belt spring steel sheet metal bent and welded with through-slots 9, and the whole body is installed on the fixed rod 5. The umbrella-shaped elastic plates 8 can also be made of a plurality of independent SWOSC-V steel belt spring steels bent and shaped with gaps and installed on the fixed rod 5. Since a plurality of sub-nets 7 are combined to form a whole screen 2, it is still inconvenient to disassemble and replace the sub-nets 7. The purpose of setting the umbrella-shaped elastic plates 8 is to evenly disperse the impact on the sub-net 7 when the material delivery pipe 3 delivers materials to the sub-net 7, so as to prolong the service life of the sub-net 7. At the same time, the umbrella-shaped elastic plates 8 are provided with openings 15 with the same aperture as the sub-net 7, which reduces the material receiving area of the umbrella-shaped elastic plates 8 and reduces the impact of the delivered materials on the umbrella-shaped elastic plates 8. The through-slots 9 with the same width as the mounting rods 6 are provided on the vertical projection plane of each mounting rod 6. The through-slots 9 improve the movement freedom of the umbrella-shaped elastic plates 8, further increase the performance of the umbrella-shaped elastic plates 8 in dispersing the impact on the sub-net 7 when the material delivery pipe 3 delivers materials to the sub-net 7, and the position cooperation of the through-slots 9 and the mounting rods 6 makes most of the materials directly passing through the through-slots 9 fall on the mounting rods 6 with better rigidity and strength, thereby reducing the impact of the materials on the sub-net 7. At the same time, the through-slots 9 divide the umbrella-shaped elastic plates 8 into a plurality of single bodies, reduce the production difficulty and manufacturing cost of the umbrella-shaped elastic plates 8, improve the practicability and reliability of the ultrasonic vibration screen, and further improve the production efficiency and particle size consistency of the antibacterial and anticorrosive powder.

[0061] The locking device is arranged above the connecting point of the fixing rod 5 and the mounting rod 6, is used for fixing the umbrella-shaped elastic plate 8 on the fixing rod 5, and comprises a cylindrical member 17 sleeved on the fixing rod 5 and integrally formed with the umbrella-shaped elastic plate 8. At least two threaded holes 18 are formed in the cylindrical member 17, and the threaded holes 18 are symmetrically arranged about the center of the cylindrical member 17. After a locking bolt 19 is inserted into the threaded hole 18, the stability of the fixing of the cylindrical member 17 and the umbrella-shaped elastic plate 8 can be improved. In order to balance the convenience of disassembly and assembly and the mounting strength, the number of the threaded holes 18 is 2, and the threaded holes 18 are used for being connected with the locking bolt 19. The locking device can be used for fixing and locking the umbrella-shaped elastic plate 8 on the fixing rod 5 by using a bolt. This scheme has simple structure and low cost, but stress concentration is prone to occurring at the threaded hole 18, and the threaded connection position is prone to being damaged by high-frequency vibration of the ultrasonic vibrating screen. An expansion interference extrusion seat adjustment locking structure similar to a bicycle seat can also be adopted. The umbrella-shaped elastic plate 8 can also be fixed on the cylindrical member 17 in the form of welding or integral sheet metal. Threaded holes 18 are formed in the cylindrical member 17, rubber locking washers 19 are screwed into the threaded holes 18, or Loctite locking washers are arranged on the contact surface between the bolt and the cylindrical member 17. The pressure of the bolt on the fixing rod 5 is used to realize the frictional fixing of the cylindrical member 17, i.e. the umbrella-shaped elastic plate 8, on the fixing rod 5.

[0062] Each of the mounting rods 6 is provided with a mounting groove 10 for being connected with the sub-net 7 on the horizontal two sides. The mounting groove 10 is conical, and the sub-net 7 is gap-fitted with the conical mounting groove 10 in the thickness direction. A wear-resistant rubber coating 11 for interference fitting of the sub-net 7 and the mounting groove 10 is arranged on the non-vertical surface of the sub-net 7 and the mounting groove 10. The wear-resistant rubber coating 11 is made of polyurethane or silicone rubber. The wear-resistant rubber coating 11 is made of polyurethane or silicone rubber, both of which have high strength, excellent wear resistance and chemical stability. Polyurethane has good adhesion and is not easy to peel off. Silicone rubber has better thermal stability. The wear-resistant rubber coating 11 can be first coated on the edge of the sub-net 7 and then cured, and then the sub-net 7 is inserted into the conical mounting groove 10 of the mounting rod 6. Alternatively, the wear-resistant rubber coating 11 can be uniformly sprayed into the conical mounting groove 10 of the mounting rod 6, and then the sub-net 7 is inserted into the conical mounting groove 10. The wear-resistant rubber coating 11 can reduce the friction and impact between the sub-net 7 and the mounting groove 10 under high-frequency vibration of the ultrasonic vibrating screen, avoid thermal deformation and material wear caused by high-frequency friction between the sub-net 7 and the mounting groove 10, and avoid metal powder falling into the material under high-frequency friction to pollute the material to be screened.

[0063] The mounting rods 6 are all hinged on the fixed rods 5, the hinging axes of the mounting rods 6 and the fixed rods 5 are all parallel to the fixed rods 5, and the rotatable angle range of the hinging points is 5-15 degrees, due to the hinging connection of the fixed rods 5 and the mounting rods 6, the fixed rods 5 and the mounting rods 6 have certain planar activity, which is more convenient for disassembling and assembling the sub-meshes 7, and all the sub-meshes 7 are sequentially installed, the mounting rods 6 and the sub-meshes 7 are mutually over-pressing, the over-pressing force direction is along the circumferential direction of the whole circular mesh screen 2, and then the mesh screens 2 are mutually pressed; compared with the common connection methods for the mesh screen 2 frame structure such as welding, riveting and locking bolt 19 connection, the hinging connection of the fixed rods 5 and the mounting rods 6 makes the fixed rods 5 and the mounting rods 6 have certain planar activity, which is more convenient for disassembling and assembling the sub-meshes 7, and meanwhile, the activity of the hinging points is utilized to further reduce the elastic deformation and plastic deformation of the mounting rods 6 caused by the impact energy of the ultrasonic vibration screen, and then the over-pressing strength of the mounting rods 6 and the sub-meshes 7 is improved, the mounting rods 6 and the sub-meshes 7 are prevented from falling off, and the rotatable angle of the hinging points is preferably 5-15 degrees, and when the angle is less than 5 degrees, the hinging structure will absorb too much impact capacity and result in insufficient strength, and when the angle is greater than 15 degrees, the swing range is not convenient for fixing the sub-meshes 7.

[0064] Each of the mounting rods 6 is provided with an anti-disengagement part for preventing the sub-meshes 7 from being disengaged along the radial direction, the anti-disengagement part comprises a mounting hole 12 arranged on each of the mounting rods 6, and the mounting hole 12 is located at the end of the mounting rod 6 away from the fixed rod 5, the mounting hole 12 is in communication with the mounting grooves 10 on both sides, and the mounting hole 12 is arranged along the axial direction of the mounting rod 6, an expansion screw 13 matched with the sub-meshes 7 on both sides of the mounting groove 10 is arranged in the mounting hole 12, an arc-shaped notch 16 matched with the expansion screw 13 is arranged on the sub-mesh 7, and the sub-meshes 7 and the mounting rods 6 are mutually over-pressing to form the whole mesh screen 2, the expansion screw 13 extrudes the arc-shaped notches 16 of the sub-meshes 7 on both sides after being screwed into the mounting hole 12, the arc-shaped notches 16 can provide clamping locking force to prevent the sub-meshes 7 from being disengaged along the radial direction, compared with the triangular or rectangular notches, the arc-shaped notches 16 can reduce the stress concentration at the edge joint position, further strengthen the over-pressing strength of the sub-meshes 7 and the mounting rods 6, and prevent the sub-meshes 7 from being assembled into a whole and not being installed into the ultrasonic vibration screen, when the sub-meshes 7 are not fixed by the inner wall of the ultrasonic vibration screen, the mesh screen 2 is easy to deform and fall off when subjected to external force impact in the thickness direction of the mesh screen 2, the expansion screw 13 can further improve the practicability and reliability of the ultrasonic vibration screen, and then the production efficiency and the particle size consistency of the antibacterial and anticorrosive powder are improved.

[0065] In the embodiment provided in the drawings of the present application, the specific use steps are as follows:

[0066] First, turn on the ultrasonic generator switch, and perform initial debugging of the device; manually pour the real machine material from above the center of the screen 2 onto the umbrella-shaped elastic plate 8, and then observe the powder condition of the umbrella-shaped elastic plate 8. After no abnormalities are found, the material slides from the umbrella-shaped elastic plate 8 to each sub-screen 7. The ultrasonic vibrating screen vibrates vertically and horizontally at the same time. Due to the extremely high vibration frequency, the direction and size of the vibration force on the particles on the screen 2 constantly change, which causes the sieved material to constantly roll and collide. At this time, the sieved material is also subjected to gravity, and under the combined action of vibration force and gravity, it moves along a spiral outward trajectory. At this time, observe the spiral outward trajectory of the material, compare it with the profile of the installation rod 6, and adjust the vibration frequency and amplitude of the ultrasonic vibrating screen to match the spiral outward trajectory of the material with the profile of the installation rod 6.

[0067] After the spiral outward trajectory of the material matches the profile of the installation rod 6, observe the discharge efficiency of the coarse particle outlet 4 for coarse particles that cannot pass through the screen. If it is found that the discharge is not smooth, a guide plate can be arranged on the inner wall of the machine body 1 to guide the coarse particles that cannot pass through the screen to be discharged. Thus, the machine adjustment operation is completed.

[0068] Subsequently, fix the parts of the machine body 1, record the current vibration frequency and amplitude, and use them as standard reference values for subsequent machine adjustment operations. Align the feed pipe 3 with the center of the screen 2, cover the corresponding protective structure, and then formally start production.

[0069] In the specific technical features and embodiments described in the specific embodiments, any suitable combination can be combined without contradiction, for example, different specific technical features / embodiments / embodiments can form different embodiments. In order to avoid unnecessary repetition, various possible combinations of each specific technical feature / embodiment / embodiment in the present application are not described again.

Claims

1. An antibacterial antiseptic powder paint preparation apparatus characterized by: The utility model relates to a kind of ultrasonic vibrating screen, including body (1), ultrasonic generator, resonator, rotor, screen (2), feed pipe (3), receiving cylinder, coarse grain port (4), the ultrasonic generator is fixedly installed on the cylindrical body (1), and ultrasonic generator is connected with the resonator movably installed on body (1), rotor is installed on the resonator, and screen (2) is arranged above rotor, screen (2) includes multiple stainless steel laser aperture (15) subnets (7) and fixed frame, the fixed frame includes vertically placed fixed rod (5) and multiple mounting rods (6) horizontally connected on fixed rod (5), and multiple mounting rods (6) are all arranged with fixed rod (5) axis circle, and one subnet (7) is connected by interference between every two mounting rods (6), multiple coarse grain ports (4) corresponding to subnet (7) discharge direction one by one are equipped on the receiving cylinder, and coarse grain port (4) all communicate with screen (2), every mounting rod (6) is the spiral shape that with the center of screen (2) as circle center diverges outward, and spiral shape is identical with the movement track of material on screen (2), the axial direction of coarse grain port (4) is parallel with the axis of adjacent mounting rod (6). Fixed rod (5) is fixedly installed with umbrella-shaped elastic plate (8) for equal division of the impact force of subnet (7), umbrella-shaped elastic plate (8) is made of elastic material, and the overall thickness of umbrella-shaped elastic plate (8) is 1-2mm, locking device is provided above the connecting point of fixed rod (5) and mounting rod (6), and the locking device is used to fix umbrella-shaped elastic plate (8) on fixed rod (5), multiple mesh holes (14) are uniformly provided on subnet (7), multiple aperture (15) identical with mesh hole (14) aperture are uniformly provided on umbrella-shaped elastic plate (8), and the vertical projection of aperture (15) on subnet (7) is completely coincident with corresponding mesh hole (14) at the bottom, umbrella-shaped elastic plate (8) is uniformly provided with through slot (9) corresponding to mounting rod (6), and the vertical projection plane of through slot (9) on subnet (7) is completely coincident with corresponding through slot (9).

2. An anti-bacterial preservative powder paint preparation apparatus as claimed in claim 1, wherein: Every mounting rod (6) is provided with mounting groove (10) for being connected with subnet (7) on horizontal two sides, the mounting groove (10) is all tapered, and subnet (7) is in clearance fit with tapered mounting groove (10) in thickness direction, wear-resistant glue coating (11) for interference fitting of subnet (7) and mounting groove (10) is provided on the non-vertical surface of subnet (7) and mounting groove (10), and the wear-resistant glue coating (11) is made of polyurethane or silicone rubber.

3. An anti-bacterial preservative powder paint preparation apparatus as claimed in claim 2, wherein: The mounting rod (6) is hinged on the fixed rod (5), the hinge axis of the mounting rod (6) and the fixed rod (5) is parallel with the fixed rod (5), and the rotatable angle range of the hinge point is 5-15 degrees, and every mounting rod (6) is provided with anti-drop portion preventing subnet (7) from separating along radial direction away from the fixed rod (5) side.

4. An anti-bacterial preservative powder paint preparation apparatus as claimed in claim 3, wherein: The anti-off part comprises a mounting hole (12) formed on each mounting rod (6), and the mounting hole (12) is located at the end of the mounting rod (6) away from the fixed rod (5), the mounting hole (12) is in communication with the mounting grooves (10) on both sides, and the mounting hole (12) is arranged along the axial direction of the mounting rod (6), the expansion screw (13) matched with the sub-net (7) on both sides of the mounting groove (10) is mounted in the mounting hole (12) in a clearance fit, and the sub-net (7) is provided with an arc-shaped notch (16) matched with the expansion screw (13) in a mortise and tenon joint.

5. An anti-bacterial preservative powder paint preparation apparatus as claimed in claim 1, wherein: The locking device comprises a cylindrical part (17) sleeved on the fixed rod (5), and the cylindrical part (17) is integrally formed with the umbrella-shaped elastic plate (8), at least two threaded holes (18) are formed in the cylindrical part (17), and the threaded holes (18) are symmetrically arranged about the center of the cylindrical part (17), and the threaded holes (18) are used for connecting with the lock bolt (19).

6. A process for the preparation of an antimicrobial preservative powder coating using the antimicrobial preservative powder coating according to any one of claims 1 to 5, characterized in that, The method comprises the following steps: S1 raw material mixing: the raw materials containing epoxy resin, hardener and additive are mixed in a mixing tank according to a set ratio, and the raw materials containing epoxy resin, hardener and additive are uniformly mixed in the mixing tank; S2 raw material melting: the uniformly mixed raw materials in the mixing tank are guided into a spiral extruder, and the raw materials in a molten state are extruded by the spiral extruder after being heated; S3 pelletizing: the molten raw materials extruded by the spiral extruder are cooled and hardened by using a cooling device, and the cooled and hardened raw materials are cut by a continuous cutter to obtain pelletized materials; S4 powdering: the pelletized materials are conveyed to a cyclone crusher by a conveying belt, the pelletized materials are ground and refined by the cyclone crusher to obtain powder materials; S5 screening: the powder materials are sent into an ultrasonic vibrating screen by using a pneumatic conveyor, the materials are guided vertically downward to the umbrella-shaped elastic plate (8), the screen (2) is vibrated by the ultrasonic generator and the resonator, and then the powder materials on the screen (2) are excited, the materials with a diameter smaller than the screen hole fall into a qualified product area below the ultrasonic vibrating screen, and the materials with a diameter larger than the screen hole are discharged from the ultrasonic vibrating screen through a coarse particle port (4); S6 packaging: the powder materials in the qualified product area of the ultrasonic vibrating screen are automatically bagged and sealed by a packaging machine.

7. A process for the preparation of an antimicrobial preservative powder coating according to claim 6, characterized in that: The screen (2) in the step S5 comprises three sub-nets (7), and the umbrella-shaped elastic plate (8) is equally divided by three through grooves (9).

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