Preparation process of metallic textured colored powder coatings

Abstract

This invention discloses a preparation process for metallic textured colored powder coatings, comprising the following steps: Step 1, raw material weighing and addition: polyester resin, epoxy resin, and floating silver aluminum powder solid raw materials are weighed and controlled using a quantitative component, and added into a raw material premixing component; Step 2, raw material premixing: after injecting the polyester resin, epoxy resin, and floating silver aluminum powder solid raw materials into the premixing component, the solid raw materials inside are thoroughly stirred and mixed by the premixing component; Step 3, melt mixing and extrusion: subsequently, the mixture is injected into a heated mixing component through a connected pipe, and the molten coating is subjected to secondary extrusion mixing by a melt mixing component located inside the heated mixing component; the fully melt-mixed coating is then extruded and extruded out; Step 4, cooling and pressing; Step 5, pulverizing and screening. This invention ensures thorough mixing of raw materials during the melt processing.

Description

Technical Field

[0001] This invention mainly relates to the technical field of coatings, specifically the preparation process of metallic textured colored powder coatings. Background Technology

[0002] With the increasing emphasis on environmental protection by the state, powder coatings, as environmentally friendly, high-efficiency, and economical products, have seen rapid growth in production, variety, and application areas in recent years. In terms of decorative properties, in addition to ordinary powder coatings with different gloss levels and smooth surfaces, the variety and usage of orange peel, wrinkle, sand texture, patterned, hammered, and metallic powder coatings are also increasing, gradually penetrating various fields of solvent-based coating applications. Among these varieties, metallic powder coatings are a major category of decorative powder coatings, including metallic glitter, metallic coatings, metallic patterns, hammered textures, and metallic gloss textured powder coatings. With the widespread use of metallic powder coatings, the quality requirements are becoming increasingly stringent. Currently, the preparation of metallic powder coatings mainly includes the following steps: raw material weighing → premixing → melt extrusion → tableting → coarse crushing → fine grinding → grading → packaging. The premixing process involves stirring and mixing the powdered base material, filler, and pigment. The melt extrusion process involves melting and extruding the mixed raw materials.

[0003] According to the powder coating preparation process provided by CN201811564712.0, the process includes: (1) raw material preparation; (2) pre-melting, where several raw materials processed in step (1) are melted through various melting equipment; (3) pre-mixing, where several molten raw materials are gradually added to a mixing equipment in proportion, and the mixture is stirred while adding the raw materials; (4) extrusion; (5) tableting; (6) pulverization; (7) impurity removal; and (8) grading, where the material is graded using a sieving device to obtain the finished product and package it. In this scheme, the pre-mixing of molten raw materials is more uniform than the pre-mixing of powder, ensuring that the composition of each powder coating particle is the same and guaranteeing the quality of the powder coating.

[0004] The above-mentioned device can achieve premixing of raw materials and improve the output quality of powder coatings, but it cannot fully mix the raw materials during the melt processing process. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a preparation process for metallic textured colored powder coatings to solve the technical problems mentioned in the background art.

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

[0007] The preparation process of metallic textured colored powder coatings includes the following steps:

[0008] Step 1: Weighing and adding raw materials. The polyester resin, epoxy resin and aluminum powder solid raw materials are weighed and controlled by the quantitative component and added into the premixing component.

[0009] Step 2: Raw material premixing. After injecting polyester resin, epoxy resin and floating silver aluminum powder solid raw materials into the premixing component, the solid raw materials inside are thoroughly stirred and mixed through the premixing component.

[0010] Step 3: Melt-mix extrusion. The mixture is then injected into the heated mixing component through a connecting pipe. The molten coating is then subjected to a secondary extrusion mixing process by the melt-mixing component located inside the heated mixing component. The fully melt-mixed coating is then pushed out through the extrusion.

[0011] Step 4: Cooling and pressing. The molten coating after extrusion is then pressed into sheets by cold rollers.

[0012] Step 5: Crushing and screening. Finally, the coating material, which has been pressed into sheets, is coarsely crushed and finely crushed using a crusher. The coating material with the qualified mesh size is then screened out.

[0013] Preferably, the premixing component includes a mixing chamber, a plurality of electromagnetic valves linearly distributed on the top of the mixing chamber, a cavity inside the mixing chamber, a stirring transmission rod passing through the side wall of the mixing chamber, a stirring mechanism located on the side wall of the stirring transmission rod, and a transmission box located on the side wall of the mixing chamber; the transmission box contains an agitator motor, the agitator motor's actuator end being connected to one end of the stirring transmission rod, and the stirring transmission rod being slidably connected to the inner wall of the mixing chamber.

[0014] Preferably, the stirring mechanism includes a shovel back plate disposed on the side wall of the stirring transmission rod, a drain box disposed on the side wall of the shovel back plate, an arc-shaped shovel disposed at the bottom of the shovel back plate, a turning feed inlet disposed at one end of the arc-shaped shovel, and a feed outlet symmetrically disposed on the top of the side wall of the drain box and located on the side wall of the shovel back plate.

[0015] Preferably, the flipping feed inlet is connected to the bottom of the drain box, the flipping back plate is located at the center of the side wall of the stirring transmission rod, and the rotation trajectory of the stirring mechanism is located inside the cavity.

[0016] Preferably, the melting and mixing component includes a feeding pipe communicating with the bottom of the mixing tank, a feeding box located at the bottom of the feeding pipe, a rotary motor located at one end of the feeding box, a melting tube located at the other end of the feeding box, a threaded screw located at the actuating end of the rotary motor, and a discharge pipe located at one end of the melting tube.

[0017] Preferably, the threaded rod is a tapered rod, and the diameter of the tapered rod gradually increases from the end away from the end where the discharge pipe is located to the end closer to the end where the discharge pipe is located. The threaded blade sidewall of the threaded rod is slidably connected to the inner wall of the melting tube. A vacuum pump is installed at the top of the injection box and on one side of the injection pipe.

[0018] Preferably, the discharge pipe is connected to the melting pipe, the discharge pipe is corrugated and has a hexagonal cross-section.

[0019] Preferably, the heating and mixing component includes a first heating tube, a second heating tube, and a third heating tube that are sleeved on the outer wall of the melting tube and arranged sequentially.

[0020] Preferably, the first heating tube is located near the side of the filling box, and the third heating tube is located near the side of the discharge pipe. The first heating tube is set to a heating temperature of 200 degrees Celsius, the second heating tube is set to a heating temperature of 700 degrees Celsius, and the third heating tube is set to a heating temperature of 400 degrees Celsius. The temperature of the first heating tube, the second heating tube, and the third heating tube is controlled by a temperature sensor.

[0021] Preferably, the metering component consists of three raw material storage boxes located on top of the plurality of electromagnetic valves, and the raw material storage boxes are respectively filled with polyester resin, epoxy resin and aluminum powder solid raw materials.

[0022] In summary, the present invention has the following main beneficial effects:

[0023] In this invention, polyester resin, epoxy resin, and aluminum powder are used as base powder raw materials. The mixture is prepared through processes such as mixing, melt extrusion, crushing, and sieving. It can achieve colored electroplating effects in different color systems. The silver powder paint has a strong metallic texture, high salt spray resistance, and high weather resistance, and does not cause other negative effects on most formulations. It is highly versatile, widely applicable, and easy to operate, achieving room temperature self-drying without high-temperature baking. However, during the injection of granules and powders, segregation can easily occur, and the powder tends to accumulate, increasing the difficulty and time required for subsequent melting and mixing of raw materials. A pre-mixing component provides initial stirring and mixing of the unmelted polyester resin, epoxy resin, and aluminum powder solid raw materials. This initial pre-mixing ensures a better final product color and more uniform paint color. The stirring mechanism in the pre-mixing component, compared to a driven stirring rod, can effectively turn and scoop the granular and powdery raw materials.

[0024] The raw materials are heated and melted by a multi-stage heating and mixing component, and then mixed a second time with a melting and mixing component. The heating and mixing component has multiple temperature settings, and by setting the temperature to rise first and then fall, energy consumption is reduced and costs are lowered while ensuring that the raw materials can be melted.

[0025] The melting and mixing component removes air trapped in the raw materials before melting and mixing, preventing oxidation of the metal materials and reducing the gloss of the finished product. During melting and mixing, the gradually compressed mixing space ensures that the molten materials are fully mixed together, and the gradual compression of the mixing space also effectively removes air bubbles from the raw materials.

[0026] In addition, when the mixed raw materials are discharged, the spiral extrusion and mixing of the raw materials are gathered and fused through the irregularly shaped discharge pipe. The stress inside the raw materials is removed during the gathering process in the discharge pipe, so that the raw materials can be better processed into tablets when they enter the cold press roller. Attached Figure Description

[0027] Figure 1 This is a flowchart illustrating the overall process steps of the present invention.

[0028] Figure 2 This is an isometric view of the integrated processing structure of the present invention;

[0029] Figure 3 This is an isometric view of the premixed component structure of the present invention;

[0030] Figure 4 This is a cross-sectional view of the premixed component of the present invention;

[0031] Figure 5 This is an isometric view of the stirring mechanism structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the heating and mixing component and the threaded rotor structure of the present invention;

[0033] Figure 7 This is an isometric view and a cross-sectional view of the discharge pipe of the present invention.

[0034] Figure Descriptions: 10. Metering component; 11. Raw material storage tank; 20. Premixing component; 21. Mixing and stirring tank; 22. Solenoid valve; 23. Cavity; 25. Stirring transmission rod; 24. Stirring mechanism; 26. Transmission box; 30. Heating and mixing component; 31. First heating tube; 32. Second heating tube; 33. Third heating tube; 40. Melting and mixing component; 41. Injection pipe; 42. Injection box; 43. Rotary motor; 44. Melting tube; 45. Threaded swivel rod; 46. Discharge pipe; 241. Tilting back plate; 242. Dispensing box; 243. Arc-shaped tilting; 244. Tilting inlet; 245. Dispensing port; 421. Vacuum pump. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] Example

[0037] like Figure 1 , 2 As shown in steps 3, 4, and 5, in step one, raw material weighing and addition, the polyester resin, epoxy resin, and aluminum powder solid raw materials are weighed and controlled by the quantitative component 10 and added into the premixing component 20. In step two, raw material premixing, after the polyester resin, epoxy resin, and aluminum powder solid raw materials are injected into the premixing component 20, the solid raw materials inside are thoroughly stirred and mixed by the premixing component 20. The premixing component 20 includes a mixing chamber 21, multiple solenoid valves 22 linearly distributed on the top of the mixing chamber 21, a cavity 23 inside the mixing chamber 21, a stirring transmission rod 25 passing through the side wall of the mixing chamber 21, a stirring mechanism 24 on the side wall of the stirring transmission rod 25, and a transmission box 26 on the side wall of the mixing chamber 21. The transmission box 26 is equipped with an agitator motor, and the agitator motor's actuator is connected to the stirring mechanism. One end of the stirring transmission rod 25 is connected and slidably connected to the inner wall of the mixing box 21; the stirring mechanism 24 includes a flipper back plate 241 on the side wall of the stirring transmission rod 25, a drain box 242 on the side wall of the flipper back plate 241, an arc-shaped flipper 243 at the bottom of the flipper back plate 241, a flipping feed inlet 244 at one end of the arc-shaped flipper 243, and a feed outlet 245 symmetrically arranged on the top of the side wall of the drain box 242 and located on the side wall of the flipper back plate 241; the flipping feed inlet 244 is connected to the bottom of the drain box 242, the flipper back plate 241 is located at the center of the side wall of the stirring transmission rod 25, and the rotation trajectory of the stirring mechanism 24 is located inside the cavity 23; the metering component 10 consists of three raw material storage boxes 11 located on top of multiple electromagnetic valves 22, and the raw material storage boxes 11 are respectively filled with polyester resin, epoxy resin and floating silver aluminum powder solid raw materials.

[0038] It should be noted that in this embodiment, for the initial mixing stage of polyester resin, epoxy resin, and floating silver aluminum powder as base powder raw materials, segregation is likely to occur during the injection of particles and powders, and the powder tends to accumulate, which will increase the difficulty of subsequent melting and mixing of raw materials and the mixing time. Through three raw material storage tanks 11, which are respectively filled with polyester resin, epoxy resin and floating silver aluminum powder solid raw materials, the solid raw materials are quantitatively injected into the mixing tank 21 through the electromagnetic valve 22 at the bottom of the raw material storage tank 11. The stirring motor in the transmission box 26 set on the side wall of the mixing tank 21 works, driving the stirring transmission rod 25 to rotate, so that the stirring mechanism 24 can stir and mix the solid raw materials.

[0039] Furthermore, during the rotation of the arc-shaped shovel 243, solid raw materials enter the dispensing box 242 connected to it through the shovel inlet 244. As the stirring transmission rod 25 continues to rotate 180 degrees until the stirring mechanism 24 is above the stirring transmission rod 25, the solid raw materials in the dispensing box 242 are discharged to both sides through the dispensing ports 245 on both sides of the dispensing box 242 under the action of gravity and rotational force. The solid raw materials flow to the bottom two ends of the mixing box 21. As the raw materials at the bottom center of the mixing box 21 are turned over, the raw materials at both ends of the mixing box 21 flow back to the bottom center of the mixing box 21. Through multiple stirring and mixing, the solid raw materials are fully stirred.

[0040] like Figure 1 , 2As shown in Figure 6, in step three, the coating material is melt-mixed and extruded, and then injected into the heated mixing component 30 through a connected pipe. The melt-mixing component 40, located inside the heated mixing component 30, performs a secondary extrusion mixing of the molten coating material. The fully melt-mixed coating material is then pushed and extruded out. The melt-mixing component 40 includes an injection pipe 41 connected to the bottom of the mixing tank 21, an injection box 42 located at the bottom of the injection pipe 41, a rotary motor 43 located at one end of the injection box 42, a melting pipe 44 located at the other end of the injection box 42, a threaded rod 45 located at the actuating end of the rotary motor 43, and a discharge pipe 46 located at one end of the melting pipe 44. The threaded rod 45 is a tapered rod, and the end furthest from the end where the discharge pipe 46 is located is closer to the end where the discharge pipe 46 is located. The diameter of the tapered rod gradually increases at one end of 46. The sidewall of the threaded blade in the threaded rod 45 is slidably connected to the inner wall of the melting tube 44. A vacuum pump 421 is installed on the top of the injection box 42 and on one side of the injection pipe 41. The heating and mixing component 30 includes a first heating tube 31, a second heating tube 32, and a third heating tube 33, which are sleeved on the outer wall of the melting tube 44 and arranged sequentially. The first heating tube 31 is located near the side of the injection box 42, and the third heating tube 33 is located near the side of the discharge pipe 46. The heating temperature of the first heating tube 31 is set to 200 degrees, the heating temperature of the second heating tube 32 is set to 700 degrees, and the heating temperature of the third heating tube 33 is set to 400 degrees. The temperature of the first heating tube 31, the second heating tube 32, and the third heating tube 33 is controlled by a temperature sensor.

[0041] It should be noted that in this embodiment, during the raw material melting and mixing stage, the valve set in the injection pipe 41 is opened, and the fully stirred mixed raw material enters the injection box 42 through the injection pipe 41. During this period, the air in the injection box 42 is extracted by the vacuum pump 421 set at the top of the injection box 42 to prevent the metal raw material from oxidizing with the air, which would cause the gloss of the finished product to decrease. As the rotating motor 43 works, it drives the threaded rod 45 to rotate and transports the mixed raw material into the melting tube 44.

[0042] The outer wall of the melting tube 44 is fitted with a first heating tube 31, a second heating tube 32, and a third heating tube 33 to heat and melt the solid raw material inside the melting tube 44. The heating tubes are set with multiple different temperatures. By setting the temperature to rise first and then fall, energy consumption is reduced and costs are lowered while ensuring that the raw material can be melted.

[0043] Furthermore, as the threaded rod 45 continues to rotate, because the threaded rod 45 is a tapered rod with its diameter gradually increasing from the end away from the end with the discharge pipe 46 to the end with the discharge pipe 46, the threaded rod 45 gradually compresses the mixing space, which can fully mix the raw materials in the molten state together. The gradual compression of the mixing space can also effectively remove air bubbles in the raw materials. The secondary mixing of the solid raw materials can make the solid raw materials more fully mixed.

[0044] like Figure 1 , 2 As shown in Figure 7, step four is cooling and pressing. The molten coating after extrusion is then pressed into a sheet shape by a cold press roller. Step five is crushing and screening. Finally, the coating pressed into a sheet shape is coarsely crushed and finely crushed by a crusher, and the coating with qualified mesh size is screened out. The discharge pipe 46 is connected to the melting pipe 44. The discharge pipe 46 is corrugated and has a hexagonal cross-section.

[0045] It should be noted that in this embodiment, when the mixed raw materials are discharged, the spiral extrusion and mixing of the raw materials are gathered and fused through the irregularly shaped discharge pipe 46. The stress inside the raw materials is removed during the process of gathering, rotating and expanding in the discharge pipe 46. Finally, the fully molten and mixed raw materials are transported to the cold press roller machine. The raw materials can be better processed into tablets in the cold press roller machine. Finally, the finished products are crushed and screened by the crushing machine and packaged.

[0046] The working principle of this invention is as follows:

[0047] In this invention, polyester resin, epoxy resin, and aluminum powder are used as base powder raw materials. The mixture is prepared through processes such as mixing, melt extrusion, crushing, and sieving. Color electroplating effects can be obtained in different color systems. Based on the analysis of the technical indicators and control characteristics of thermosetting powder coatings, combined with stainless steel powder coating formulations, silver powder paint has the characteristics of strong metallic texture, high salt spray resistance, and high weather resistance. A transparent powder is then coated on its surface to create various color electroplating effects. Good leveling properties and a full paint film are required. It will not cause other negative effects on most formulations and can achieve room temperature self-drying without high-temperature baking.

[0048] For the initial mixing stage using polyester resin, epoxy resin, and aluminum powder as base powder, segregation is prone to occur during the injection of granules and powders, causing powder to easily clump together, which increases the difficulty and time of subsequent melting and mixing. Three raw material storage tanks 11, each containing solid raw materials of polyester resin, epoxy resin, and aluminum powder respectively, are used. A solenoid valve 22 at the bottom of each storage tank 11 quantitatively injects the solid raw materials into a mixing chamber 21. A motor in a transmission box 26 located on the side wall of the mixing chamber 21 operates, driving the stirring transmission rod 25 to rotate, thereby enabling the stirring mechanism 24 to mix the solid raw materials. During the rotation of the arc-shaped shovel 243, solid raw materials enter the dispensing box 242 connected to it through the shovel inlet 244. As the stirring transmission rod 25 continues to rotate 180 degrees until the stirring mechanism 24 is above the stirring transmission rod 25, the solid raw materials in the dispensing box 242 are discharged to both sides through the dispensing ports 245 on both sides of the dispensing box 242 under the action of gravity and rotational force. The solid raw materials flow to the bottom two ends of the mixing box 21. As the raw materials at the bottom center of the mixing box 21 are turned over, the raw materials at both ends of the mixing box 21 flow back to the bottom center of the mixing box 21. Through multiple stirring and mixing, the solid raw materials are fully stirred.

[0049] During the raw material melting and mixing stage, the valve on the injection pipe 41 is opened, and the fully stirred mixed raw material enters the injection box 42 through the injection pipe 41. During this process, the vacuum pump 421 installed at the top of the injection box 42 extracts the air from the injection box 42 to prevent the metal raw material from oxidizing with the air, which would reduce the gloss of the finished product. As the rotating motor 43 operates, it drives the threaded screw 45 to rotate and transport the mixed raw material to the melting tube 44. The outer wall of the melting tube 44 is fitted with a first heating tube 31, a second heating tube 32, and a third heating tube 33 to heat and melt the solid raw material inside the melting tube 44. The tube employs multiple temperature settings, with the temperature first rising and then falling, reducing energy consumption and lowering costs while ensuring the raw materials can be melted. Furthermore, as the threaded rod 45 continues to rotate, its tapered shape, with the diameter gradually increasing from the end furthest from the discharge pipe 46 towards the end closest to it, allows for the gradual compression of the mixing space. This ensures thorough mixing of the molten raw materials and effectively removes air bubbles, resulting in a more complete secondary mixing of the solid materials.

[0050] In addition, when the mixed raw materials are discharged, the spiral extrusion and mixing of the raw materials are gathered and fused through the irregularly shaped discharge pipe 46. The stress inside the raw materials is removed during the process of gathering, rotating and expanding in the discharge pipe 46, so that the raw materials can be better processed into tablets when entering the cold press roller.

[0051] The above embodiments are merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A preparation process for metallic textured colored powder coatings, characterized in that... This includes the following steps: Step 1: Weighing and adding raw materials. The polyester resin, epoxy resin and floating silver aluminum powder solid raw materials are weighed and controlled by the quantitative component (10) and added into the premixing component (20). Step 2: Raw material premixing. After injecting polyester resin, epoxy resin and floating silver aluminum powder solid raw materials into the premixing component (20), the solid raw materials inside are thoroughly stirred and mixed through the premixing component (20). Step 3: Melt-mix extrusion, then inject into the heated mixing component (30) through a connected pipe, and perform secondary extrusion mixing of the molten coating through the melt-mixing component (40) set inside the heated mixing component (30); and push the fully melt-mixed coating out through extrusion. Step 4: Cooling and pressing. The molten coating after extrusion is then pressed into sheets by cold rollers. Step 5: Crushing and screening. Finally, the coating material, which has been pressed into sheets, is processed by coarse and fine crushing using a crusher. The coating material that meets the qualified mesh size is then screened out. The premixing component (20) includes a mixing tank (21), a plurality of electromagnetic valves (22) linearly distributed on the top of the mixing tank (21), a cavity (23) inside the mixing tank (21), a stirring transmission rod (25) passing through the side wall of the mixing tank (21), a stirring mechanism (24) on the side wall of the stirring transmission rod (25), and a transmission box (26) on the side wall of the mixing tank (21); the transmission box (26) is equipped with an agitator motor, the agitator motor's actuator end is connected to one end of the stirring transmission rod (25), and the stirring transmission rod (25) is slidably connected to the inner wall of the mixing tank (21); The stirring mechanism (24) includes a shovel back plate (241) disposed on the side wall of the stirring transmission rod (25), a drain box (242) disposed on the side wall of the shovel back plate (241), an arc-shaped shovel (243) disposed at the bottom of the shovel back plate (241), a turning feed inlet (244) disposed at one end of the arc-shaped shovel (243), and a feed outlet (245) symmetrically disposed on the top of the side wall of the drain box (242) and located on the side wall of the shovel back plate (241). The flipping feed inlet (244) is connected to the bottom of the drain box (242), the flipping back plate (241) is located at the center of the side wall of the stirring transmission rod (25), and the rotation trajectory of the stirring mechanism (24) is located inside the cavity (23).

2. The preparation process of the metallic textured colored powder coating according to claim 1, characterized in that, The melting and mixing component (40) includes a feeding pipe (41) connected to the bottom of the mixing tank (21), a feeding box (42) located at the bottom of the feeding pipe (41), a rotary motor (43) located at one end of the feeding box (42), a melting tube (44) located at the other end of the feeding box (42), a threaded screw (45) located at the actuating end of the rotary motor (43), and a discharge pipe (46) located at one end of the melting tube (44).

3. The preparation process of the metallic textured colored powder coating according to claim 2, characterized in that, The threaded rod (45) is a tapered rod, and the diameter of the tapered rod gradually increases from the end away from the end where the discharge pipe (46) is located to the end closer to the end where the discharge pipe (46) is located. The threaded blade sidewall of the threaded rod (45) is slidably connected to the inner wall of the melting tube (44). A vacuum pump (421) is installed on the top of the injection box (42) and on one side of the injection pipe (41).

4. The preparation process of the metallic textured colored powder coating according to claim 3, characterized in that, The discharge pipe (46) is connected to the melting pipe (44). The discharge pipe (46) is corrugated and has a hexagonal cross-section.

5. The preparation process of the metallic textured colored powder coating according to claim 2, characterized in that, The heating and mixing component (30) includes a first heating tube (31), a second heating tube (32), and a third heating tube (33) that are sleeved on the outer wall of the melting tube (44) and arranged sequentially.

6. The preparation process of the metallic textured colored powder coating according to claim 5, characterized in that, The first heating tube (31) is located near the side of the filling box (42), and the third heating tube (33) is located near the side of the discharge pipe (46). The first heating tube (31) is set to a heating temperature of 200 degrees, the second heating tube (32) is set to a heating temperature of 700 degrees, and the third heating tube (33) is set to a heating temperature of 400 degrees. The first heating tube (31), the second heating tube (32), and the third heating tube (33) are all regulated by temperature sensors.

7. The preparation process of the metallic textured colored powder coating according to claim 1, characterized in that, The quantitative component (10) consists of three raw material storage boxes (11) located on top of the multiple electromagnetic valves (22). The raw material storage boxes (11) are respectively filled with polyester resin, epoxy resin and floating silver aluminum powder solid raw materials.

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