Powder coating device

Abstract

The invention belongs to the technical field of composite powder preparation, and discloses a powder coating device. The powder coating device comprises a shell and a stirring assembly, and the shell is provided with a reaction cavity used for containing at least two kinds of powder; the stirring assembly comprises a powdering piece, a static blocking piece and a driving piece, the static blocking piece is fixed to the shell and provided with a flow guide face arranged in the reaction cavity, the powdering piece is arranged in the reaction cavity and provided with a flow guide protrusion, the driving piece is partially arranged in the reaction cavity and connected with the powdering piece, and the driving piece is used for driving the powdering piece to rotate; when the driving piece drives the powder beating piece to rotate in the reaction cavity, the flow guide protrusions arranged on the powder beating piece enable powder to rotate and be mixed according to a vortex-shaped track, the powder can collide with the flow guide face when rotating in the reaction cavity, and under the combined action of the powder beating piece and the static blocking piece, the powder coating uniformity and efficiency are effectively improved, and the coating effect is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of composite powder preparation technology, and in particular to a powder coating device. Background Technology

[0002] Powder coating technology is a material modification process that uses physical or chemical methods to form a functional coating layer on the surface of matrix particles. Its core value lies in giving materials new interfacial properties and composite performance.

[0003] Solid-phase coating mainly employs mechanical mixing methods. In existing technologies, mixing equipment is used to stir and mix two powders. However, conventional stirring and mixing methods result in poor powder uniformity and low mixing efficiency.

[0004] Therefore, there is an urgent need to provide a powder coating device to improve the uniformity and efficiency of powder coating. Summary of the Invention

[0005] The purpose of this invention is to provide a powder coating device to improve the uniformity and efficiency of powder coating.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This invention provides a powder coating device, which includes a housing and a stirring assembly. The housing has a reaction chamber for accommodating at least two types of powder. The stirring assembly includes a powder grinding component, a stationary baffle, and a driving component. The stationary baffle is fixed to the housing and has a guide surface placed within the reaction chamber. The powder grinding component is disposed within the reaction chamber and has a guide protrusion. The driving component is partially disposed within the reaction chamber and connected to the powder grinding component. The driving component drives the powder grinding component to rotate, so that the powder in the reaction chamber rotates along a vortex trajectory and collides with the guide surface.

[0008] As an optional technical solution for a powder coating device, the powder grinding component is provided with a powder grinding groove communicating with the reaction chamber, the flow guiding protrusion is located outside the powder grinding groove, and one end of the stationary baffle with the flow guiding surface is inserted into the powder grinding groove. The powder enters the powder grinding groove from the reaction chamber and collides with the flow guiding surface.

[0009] As an optional technical solution for a powder coating device, the stirring assembly further includes a powder scraper, one end of which is fixed to the housing and the other end is inserted into the powder grinding trough. The powder scraper and the stationary baffle are spaced apart to scrape off the powder adhering to the inner wall of the powder grinding trough.

[0010] As an optional technical solution for a powder coating device, the powder grinding component includes a base support, a connecting cylinder, and a main cylinder. The connecting cylinder and the main cylinder are both connected to the base support. The connecting cylinder is located inside the main cylinder. The base support, the connecting cylinder, and the main cylinder form the powder grinding groove. The connecting cylinder is connected to the driving component. At least a portion of the flow guiding protrusion is provided on the main cylinder.

[0011] As an optional technical solution for a powder coating device, the main cylinder is provided with a powder inlet hole to allow the powder in the reaction chamber to enter the powder grinding tank;

[0012] And / or, the flow guide protrusion extends from the base portion to the main cylinder portion.

[0013] As an optional technical solution for a powder coating device, it also includes a fixed base. The driving component includes a rotating shaft. The fixed base is a one-time processing structure. The rotating shaft is rotatably connected to the fixed base. The rotation of the rotating shaft drives the powder grinding component to rotate.

[0014] As an optional technical solution for a powder coating device, the housing is provided with a water-cooled cavity, which is arranged around the outer periphery of the reaction chamber. The housing is provided with a water-cooled connector that communicates with the water-cooled cavity for supplying or draining water to the water-cooled cavity.

[0015] As an optional technical solution for a powder coating device, a pressure relief valve is also included, which is disposed in the housing for venting gas from the reaction chamber.

[0016] As an optional technical solution for a powder coating device, it also includes a temperature detector, which is partially inserted into the stationary baffle to detect the temperature inside the reaction chamber.

[0017] As an optional technical solution for a powder coating device, the housing includes a chamber cylinder, a chamber cover, and a first clamp. The chamber cover is detachably fixed to the chamber cylinder via the first clamp. The chamber cover and the chamber cylinder form the reaction chamber. The stationary baffle is fixed to the chamber cover.

[0018] Beneficial effects:

[0019] This invention provides a powder coating device, comprising a shell and a stirring assembly. The shell has a reaction chamber for accommodating at least two types of powder. The stirring assembly includes a powder pulverizer, a stationary baffle, and a driving component. The stationary baffle is fixed to the shell and has a guide surface positioned within the reaction chamber. The powder pulverizer is disposed within the reaction chamber and has guide protrusions. The driving component is partially disposed within the reaction chamber and connected to the powder pulverizer. The driving component drives the powder pulverizer to rotate, causing the powder within the reaction chamber to rotate along a vortex trajectory and collide with the guide surface. By placing the powder pulverizer within the reaction chamber of the shell and positioning the guide surface of the stationary baffle within the reaction chamber, when the driving component drives the powder pulverizer to rotate within the reaction chamber, the guide protrusions on the powder pulverizer cause the powder to rotate and mix along a vortex trajectory. Furthermore, the powder collides with the guide surface as it rotates within the reaction chamber. The combined action of the powder pulverizer and the stationary baffle effectively improves the uniformity and efficiency of powder coating, ensuring the coating effect. Attached Figure Description

[0020] Figure 1 This is a partial structural schematic diagram of the powder coating device provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the chamber cover, pressure relief valve, temperature detector, and part of the stirring assembly provided in the embodiments of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the chamber cylinder, temperature detector, and part of the stirring assembly provided in the embodiment of the present invention;

[0023] Figure 4 This is a first-view structural schematic diagram of the powder grinding component provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the powder grinding component from a second perspective according to an embodiment of the present invention;

[0025] Figure 6 This is a structural schematic diagram of the stationary stop provided in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the powder scraper provided in an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the chamber cylinder and the air supply assembly provided in an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the chamber cylinder, the fixed base, and the driving component provided in the embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of the chamber cylinder and water-cooled connector provided in an embodiment of the present invention.

[0030] In the picture:

[0031] 10. Shell; 10a. Reaction chamber; 11. Chamber cylinder; 111. Inner cylinder; 112. Outer cylinder; 113. Water-cooled chamber; 12. Chamber cover; 13. First clamp; 14. Water-cooled connector; 15. Second clamp;

[0032] 20. Stirring assembly; 21. Powder grinding component; 21a. Powder grinding trough; 210. Flow guide protrusion; 211. Base support; 212. Connecting cylinder; 213. Main cylinder; 2131. Powder inlet through hole; 22. Stationary baffle; 22a. Stationary baffle rod; 22b. Stop; 221. Flow guide surface; 23. Powder scraper; 231. Main rod body; 232. Powder scraper; 24. Drive component; 24a. Rotating shaft;

[0033] 30. Fixing base; 31. First bearing; 32. Second bearing; 40. Air supply assembly; 41. Support; 42. Air supply connector; 50. Pressure relief valve; 60. Temperature detector; 70. Third clamp. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0035] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0038] like Figures 1 to 6 as well as Figure 9 As shown, this embodiment provides a powder coating device, which includes a housing 10 and a stirring assembly 20. The housing 10 has a reaction chamber 10a for accommodating at least two types of powder. The stirring assembly 20 includes a powder pulverizer 21, a stationary baffle 22, and a driving component 24. The stationary baffle 22 is fixed to the housing 10 and has a guide surface 221 placed in the reaction chamber 10a. The powder pulverizer 21 is disposed in the reaction chamber 10a and has a guide protrusion 210. The driving component 24 is partially disposed in the reaction chamber 10a and connected to the powder pulverizer 21. The driving component 24 is used to drive the powder pulverizer 21 to rotate so that the powder in the reaction chamber 10a rotates along a vortex trajectory and collides with the guide surface 221.

[0039] By setting a powder-grinding component 21 in the reaction chamber 10a of the housing 10 and placing the guide surface 221 of the stationary baffle 22 in the reaction chamber 10a, when the driving component 24 drives the powder-grinding component 21 to rotate in the reaction chamber 10a, the guide protrusion 210 on the powder-grinding component 21 causes the powder to rotate and mix in a vortex-like trajectory. When the powder rotates in the reaction chamber 10a, it will collide with the guide surface 221. Under the combined action of the powder-grinding component 21 and the stationary baffle 22, the uniformity and efficiency of powder coating are effectively improved, ensuring the coating effect.

[0040] Specifically, the shell 10 includes a chamber cylinder 11, a chamber cover 12, and a first clamp 13. The chamber cover 12 is detachably fixed to the chamber cylinder 11 via the first clamp 13. The chamber cover 12 and the chamber cylinder 11 form a reaction chamber 10a, and a stationary baffle 22 is fixed to the chamber cover 12. In this embodiment, the powder contained in the reaction chamber 10a is nanoparticles and micron-sized particles.

[0041] The chamber cover 12 is detachably fixed to the chamber cylinder 11 by the first clamp 13, thereby forming the reaction chamber 10a. The first clamp 13 makes the pressure evenly distributed by the annular fastening, avoids local stress concentration, and helps to improve the sealing of the connection between the chamber cover 12 and the chamber cylinder 11. The opening and closing operation of the chamber cover 12 is convenient and quick, which is convenient for picking up and putting in powder, as well as for cleaning and maintenance.

[0042] Since powder coating may generate gas, to prevent excessive gas pressure in the reaction chamber 10a, in some embodiments, the powder coating device further includes a pressure relief valve 50. The pressure relief valve 50 is disposed in the housing 10 for venting gas from the reaction chamber 10a. In this embodiment, the chamber cover 12 is provided with a mounting through hole communicating with the reaction chamber 10a, and the pressure relief valve 50 is sealed and fixed at the mounting through hole of the chamber cover 12.

[0043] In this embodiment, the powder coating device includes a first pair of connecting pipes, a second pair of connecting pipes, and a second clamp 15. The first pair of connecting pipes is inserted into and sealed in the mounting through hole of the chamber cover 12. The pressure relief valve 50 is threadedly connected to the second pair of connecting pipes. The second pair of connecting pipes is fixed to the first pair of connecting pipes by the second clamp 15, thereby installing the pressure relief valve 50 on the chamber cover 12.

[0044] In some embodiments, the powder coating device further includes a temperature detector 60, which is partially inserted into the stationary baffle 22 to detect the temperature inside the reaction chamber 10a. By inserting the temperature detector 60 into the stationary baffle 22, and thus indirectly placing it in the reaction chamber 10a, it avoids direct contact with the powder, thus preventing it from affecting the powder coating. This also facilitates the monitoring and control of the temperature inside the reaction chamber 10a, preventing excessively high temperatures from affecting the powder coating effect.

[0045] See Figures 3 to 5 The powder grinding component 21 is provided with a powder grinding groove 21a that communicates with the reaction chamber 10a. The flow guiding protrusion 210 is located outside the powder grinding groove 21a. The stationary baffle 22 has one end with a flow guiding surface 221 inserted into the powder grinding groove 21a. The powder enters the powder grinding groove 21a from the reaction chamber 10a and collides with the flow guiding surface 221.

[0046] By setting a pulverizing groove 21a on the pulverizing component 21 that communicates with the reaction chamber 10a, setting the flow guiding protrusion 210 outside the pulverizing groove 21a, and inserting one end of the stationary baffle 22 with the flow guiding surface 221 into the pulverizing groove 21a, under the action of the flow guiding protrusion 210 of the pulverizing component 21, the powder rotates and mixes in the reaction chamber 10a according to a vortex trajectory. At the same time, the powder can enter the pulverizing groove 21a from the reaction chamber 10a and collide with the flow guiding surface 221. Inserting one end of the stationary baffle 22 into the pulverizing groove 21a makes the spatial arrangement more reasonable, which helps to accommodate a larger pulverizing component 21 and ensures the powder coating effect.

[0047] In this embodiment, the powder grinding component 21 includes a base support 211, a connecting cylinder 212, and a main cylinder 213. Both the connecting cylinder 212 and the main cylinder 213 are connected to the base support 211. The connecting cylinder 212 is located inside the main cylinder 213. The base support 211, the connecting cylinder 212, and the main cylinder 213 form a powder grinding trough 21a. The connecting cylinder 212 is connected to the drive component 24. At least a portion of the flow-guiding protrusions 210 are disposed on the main cylinder 213. By forming the powder grinding trough 21a with the base support 211, the connecting cylinder 212, and the main cylinder 213, and with the connecting cylinder 212 located inside the main cylinder 213, an annular powder grinding trough 21a is formed, which facilitates the flow of powder within the powder grinding trough 21a.

[0048] In this embodiment, the base portion 211 is circular; the connecting cylinder portion 212 is located at the middle position of the base portion 211; the main cylinder portion 213 is provided with a powder inlet hole 2131 to allow the powder in the reaction chamber 10a to enter the powder grinding tank 21a; the powder inlet hole 2131 is located near the guide protrusion 210; the main cylinder portion 213 has a bottom end connected to the base portion 211 and a top end away from the base portion 211, and the powder inlet hole 2131 is located near the bottom end of the main cylinder portion 213; there are two powder inlet holes 2131 arranged opposite each other; the powder inlet hole 2131 is an elliptical hole.

[0049] See Figure 5 The guide protrusion 210 extends from the base portion 211 to the main cylinder portion 213. By setting the guide protrusion 210 to extend from the base portion 211 to the main cylinder portion 213, the guide protrusion 210 can guide the powder on both the outer bottom surface of the base portion 211 and the outer side surface of the main cylinder portion 213, preventing some powder from accumulating below the base portion 211 and resulting in poor powder coating effect.

[0050] In this embodiment, an annular protrusion is provided at the connection position between the bottom support portion 211 and the connecting cylinder portion 212. Two flow guiding protrusions 210 are arranged opposite each other. One end of the flow guiding protrusion 210 is connected to the annular protrusion and the other end extends from the outer bottom surface of the bottom support portion 211 to the outer side surface of the main cylinder portion 213 until it is flush with the end face of the main cylinder portion 213 on the side away from the bottom support portion 211.

[0051] See Figure 3 , Figure 4 and Figure 6 The stationary stop 22 includes a stationary stop rod 22a and a stop portion 22b connected to the stationary stop rod 22a. The stop portion 22b is provided with a guide surface 221 on the side near the main cylinder portion 213. The guide surface 221 is a wavy surface; a wavy surface refers to a surface that is uneven.

[0052] In this embodiment, the side of the stop portion 22b away from the main cylinder portion 213 is a plane; the cross section of the stop portion 22b along the axis of the stationary stop rod 22a is approximately circular fan-shaped, which refers to a planar figure enclosed by an arc and two radii passing through the two ends of this arc.

[0053] See Figure 2 , Figure 3 and Figure 7 The mixing assembly 20 also includes a powder scraper 23. One end of the powder scraper 23 is fixed to the housing 10 and the other end is inserted into the powder mixing trough 21a. The powder scraper 23 and the stationary baffle 22 are spaced apart to scrape off the powder adhering to the inner wall of the powder mixing trough 21a. By adding the powder scraper 23 in the powder mixing trough 21a, when the powder mixing assembly 21 rotates, the powder scraper 23 scrapes off the powder adhering to the inner wall of the powder mixing trough 21a, thus preventing the powder from adhering to the inner wall of the powder mixing trough 21a and affecting the uniformity of powder coating.

[0054] In this embodiment, the powder scraper 23 includes a main rod 231 and a powder scraping part 232 connected to the main rod 231. The main rod 231 is fixed to the chamber cover 12, and the powder scraping part 232 is placed in the reaction chamber 10a. The tip of the powder scraping part 232 is positioned towards the connecting cylinder 212 to scrape off the powder adhering to the surface of the connecting cylinder 212.

[0055] In this embodiment, the stationary baffle 22a of the stationary baffle 22 and the main rod 231 of the powder scraper 23 are both sealed through the chamber cover 12 and fixed to the chamber cover 12 by nuts. In other embodiments, the stationary baffle 22a and the powder scraper 23 can also be detachably fixed to the chamber cover 12 by snap-fit ​​or other methods to facilitate cleaning and maintenance.

[0056] See Figure 1 , Figure 8 and Figure 9 The powder coating device also includes a base (not shown), a fixing seat 30, and a gas supply assembly 40. The gas supply assembly 40 includes a support 41 and a gas supply connector 42. The fixing seat 30 is fixed to the base, the support 41 is fixed to the fixing seat 30, the chamber cylinder 11 is fixed to the support 41, one end of the gas supply connector 42 is placed outside the support 41, and the other end of the gas supply connector 42 is placed inside the support 41 and communicates with the reaction chamber 10a to introduce nitrogen gas into the reaction chamber 10a. Nitrogen gas, as an inert gas, can prevent oxidation of active powders (such as metal powders and alloy powders) during the high-temperature coating process, ensuring component stability.

[0057] In this embodiment, the support 41 is fixed to the fixing base 30 by bolts, and the chamber cylinder 11 is fixed to the support 41 by the third clamp 70. In other embodiments, the chamber cylinder 11 can also be directly fixed to the fixing base 30, and the air supply assembly 40 can be placed in other positions.

[0058] In this embodiment, the driving component 24 includes a rotating shaft 24a, and the fixed base 30 is a one-time processing structure. The rotating shaft 24a is rotatably connected to the fixed base 30, and the rotation of the rotating shaft 24a drives the powder grinding component 21 to rotate. The driving component 24 also includes a drive motor, and the rotating shaft 24a is driven to rotate by the drive motor. When the rotating shaft 24a rotates, it drives the powder grinding component 21 to rotate in the reaction chamber 10a. The rotation speed of the powder grinding component 21 is above 400 rpm, which is a high-speed rotation state.

[0059] The fixed base 30 is designed as a one-time processing structure, which is processed from a single material and only requires one clamping. This prevents eccentricity caused by the different coaxiality of the rotating shaft 24a and the corresponding hole of the fixed base 30. Once eccentric, centrifugal force will be generated during high-speed rotation, resulting in loosening between the chamber cylinder 11, the support 41 and the fixed base 30, as well as vibration and noise. The rotating shaft 24a is driven by a drive motor to increase the rotation speed, thereby improving the powder coating effect.

[0060] In this embodiment, the fixed base 30 is provided with a first bearing 31 and a second bearing 32. The rotating shaft 24a is rotatably mounted on the fixed base 30 through the first bearing 31 and the second bearing 32. The head of the rotating shaft 24a passes through the support 41 and the chamber cylinder 11 in sequence and is keyed to the connecting cylinder 212 of the powder grinding component 21.

[0061] The support 41 is equipped with a sealing structure. The rotating shaft 24a is rotatably inserted into the support 41 through the sealing structure. The sealing structure can also ensure the sealing of the connection between the rotating shaft 24a and the chamber cylinder 11. The sealing structure includes components such as a rotary pressure seal, an oil seal, and bearings. The principle of the sealing structure is existing technology and will not be described in detail here.

[0062] See Figure 10 The housing 10 contains a water-cooled cavity 113, which is arranged around the outer periphery of the reaction chamber 10a. The housing 10 is provided with a water-cooled connector 14 that communicates with the water-cooled cavity 113 for supplying or draining water to the water-cooled cavity 113. By using the water-cooled cavity 113 arranged around the outer periphery of the reaction chamber 10a and connected to the water-cooled connector 14, the heat generated by the powder coating in the reaction chamber 10a is quickly transferred by water cooling, resulting in high heat dissipation efficiency.

[0063] In this embodiment, the chamber cylinder 11 includes an inner cylinder 111 and an outer cylinder 112. The outer cylinder 112 is sleeved and fixed to the outside of the inner cylinder 111 and forms a water-cooled cavity 113 with the inner cylinder 111. A water-cooled connector 14 is disposed on the outer cylinder 112 and communicates with the water-cooled cavity 113. Two water-cooled connectors 14 are provided at intervals, one of which is used to supply water to the water-cooled cavity 113 and the other is used to discharge water from the water-cooled cavity 113.

[0064] The following is a detailed description of the operation of the powder coating device:

[0065] Open the chamber cover 12 and pour the nano powder and micron powder into the chamber cylinder 11 through the feed port. Then, use the first clamp 13 to cover and fix the chamber cover 12 onto the chamber cylinder 11, so that the reaction chamber 10a is in a closed state. Drive the motor to drive the rotating shaft 24a to rotate, which in turn drives the powder grinding component 21 to rotate in the reaction chamber 10a. The guide protrusions 210 on the powder grinding component 21 cause the powder to rotate and mix in a vortex-like trajectory. When the powder rotates in the reaction chamber 10a, it will collide with the guide surface 221. Use the water cooling chamber 113 to continuously cool the reaction chamber 10a until the powder is coated.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A powder coating device, characterized in that, The device includes a housing (10) and a stirring assembly (20). The housing (10) has a reaction chamber (10a) for containing at least two types of powders. The stirring assembly (20) includes a powder grinding component (21), a stationary baffle (22), and a driving component (24). The stationary baffle (22) is fixed to the housing (10) and has a guide surface (221) placed inside the reaction chamber (10a). The powder grinding component (21) is disposed inside the reaction chamber (10a) and has a guide protrusion (210). The driving component (24) is partially placed in the reaction chamber (10a) and connected to the powder grinding component (21). The driving component (24) is used to drive the powder grinding component (21) to rotate so that the powder in the reaction chamber (10a) rotates along a vortex trajectory and collides with the guide surface (221).

2. The powder coating device according to claim 1, characterized in that, The powder grinding component (21) is provided with a powder grinding groove (21a) communicating with the reaction chamber (10a). The flow guiding protrusion (210) is located outside the powder grinding groove (21a). The stationary baffle (22) is provided with one end of the flow guiding surface (221) inserted into the powder grinding groove (21a). The powder enters the powder grinding groove (21a) from the reaction chamber (10a) and collides with the flow guiding surface (221).

3. The powder coating device according to claim 2, characterized in that, The stirring assembly (20) also includes a powder scraper (23), one end of which is fixed to the housing (10) and the other end is inserted into the powder grinding tank (21a). The powder scraper (23) and the stationary baffle (22) are spaced apart to scrape off the powder adhering to the inner wall of the powder grinding tank (21a).

4. The powder coating device according to claim 2, characterized in that, The powder grinding component (21) includes a base support (211), a connecting cylinder (212), and a main cylinder (213). The connecting cylinder (212) and the main cylinder (213) are both connected to the base support (211). The connecting cylinder (212) is located inside the main cylinder (213). The base support (211), the connecting cylinder (212), and the main cylinder (213) form the powder grinding groove (21a). The connecting cylinder (212) is connected to the driving component (24). At least a portion of the flow guiding protrusion (210) is provided on the main cylinder (213).

5. The powder coating device according to claim 4, characterized in that, The main cylinder (213) is provided with a powder inlet hole (2131) so that the powder in the reaction chamber (10a) can enter the powder grinding tank (21a); And / or, the flow guide protrusion (210) extends from the base portion (211) to the main cylinder portion (213).

6. The powder coating device according to claim 1, characterized in that, It also includes a fixed base (30), the driving component (24) includes a rotating shaft (24a), the fixed base (30) is a one-time processing structure, the rotating shaft (24a) is rotatably connected to the fixed base (30), and the rotation of the rotating shaft (24a) drives the powder grinding component (21) to rotate.

7. The powder coating device according to claim 1, characterized in that, The housing (10) is provided with a water-cooled cavity (113), which is arranged around the outer periphery of the reaction chamber (10a). The housing (10) is provided with a water-cooled connector (14) that communicates with the water-cooled cavity (113) for supplying water or draining water to the water-cooled cavity (113).

8. The powder coating apparatus according to any one of claims 1-6, characterized in that, It also includes a pressure relief valve (50), which is disposed in the housing (10) for discharging gas from the reaction chamber (10a).

9. The powder coating device according to any one of claims 1-6, characterized in that, It also includes a temperature detector (60), which is partially inserted into the stationary baffle (22) to detect the temperature inside the reaction chamber (10a).

10. The powder coating apparatus according to any one of claims 1-6, characterized in that, The housing (10) includes a chamber cylinder (11), a chamber cover (12), and a first clamp (13). The chamber cover (12) is detachably fixed to the chamber cylinder (11) by the first clamp (13). The chamber cover (12) and the chamber cylinder (11) together form the reaction chamber (10a). The stationary baffle (22) is fixed to the chamber cover (12).

Images