Electrostatic powder spinning cup

Abstract

The application provides a powder electrostatic spinning cup, which comprises a shell body, a powder passing assembly is arranged in the shell body, and powder coating flows in the shell body; a spinning cup main body is connected to the upper end of the powder passing assembly, the spinning cup main body is rotatably connected to the powder passing assembly, and the spinning cup main body is circumferentially provided with a second opening; the powder coating can be sprayed out of the second opening; a plurality of air outlets are circumferentially arranged at the top end of the shell body, one end of the air outlet is connected to a gas supply assembly, the airflow blown out of the air outlet can form an air curtain, the air curtain intersects with the flowing path of the powder coating sprayed out of the second opening; and an air force adjusting assembly is used for adjusting the air pressure of the airflow blown out of the air outlet. Through cooperation of the air blowing assembly and the gas supply assembly, the air curtain intersecting with the flowing path of the sprayed powder is formed, the air pressure of the airflow blown out of the air outlet is adjusted through the air force adjusting assembly, the gas flow rate sprayed out of the air outlet is adjusted, the spraying range of the powder coating sprayed out of the spinning cup main body is adjusted, and the application range of the electrostatic spinning cup is improved.

Description

Technical Field

[0001] This application relates to the field of spray coating rotary cup technology, specifically to a powder electrostatic rotary cup. Background Technology

[0002] With my country's increasing emphasis on environmental protection, powder coating has become increasingly widely used because it is non-toxic, solvent-free, and free of volatile toxic substances.

[0003] Electrostatic spraying utilizes the principle of high-voltage electrostatic corona discharge. A metal guide cup on the spray gun head is connected to a high-voltage negative electrode, while the workpiece being coated is grounded, forming a positive electrode. A strong electrostatic field is created between the spray gun and the workpiece. When the carrier gas delivers the powder coating from the powder supply hopper through the powder delivery pipe to the guide cup of the spray gun, a dense charge is generated around it, and the powder becomes negatively charged. Under the action of electrostatic force and compressed air, the powder is uniformly adsorbed onto the workpiece. After heating, the powder melts and solidifies into a uniform, continuous, flat, and smooth coating film.

[0004] Currently, most powder coating applications use electrostatic powder spray guns, where the atomization and shaping of the powder coating rely primarily on the flow control of the powder supply system. The spray width of the powder coating is essentially fixed, resulting in limited applicability. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide a powder electrostatic rotating cup, comprising:

[0006] The outer shell body has a first space inside and a first opening communicating with the first space at its top;

[0007] A powder-passing assembly is disposed within the first space and has a first channel through which powder coating flows.

[0008] The rotary cup body is located on the outer shell body near the first opening side, and its bottom end is rotatably connected to the powder conveying assembly. The rotary cup body has a first cavity communicating with the first channel, and the rotary cup body has a second opening around its circumference communicating with the first cavity. The powder coating can be sprayed out through the second opening.

[0009] The air blowing assembly includes a plurality of air outlets disposed around the periphery of the outer shell body. One end of each air outlet is connected to the outside of the outer shell body, and the other end is connected to a first air supply assembly. The first air supply assembly is used to supply air to the air outlets, and the airflow blown out from the air outlets forms an air curtain. The air curtain intersects with the flow path of the powder coating after it is sprayed out from the second opening.

[0010] A wind force regulating component, which is connected to the first air supply component, is used to regulate the pressure of the airflow blown out from the air outlet.

[0011] According to the technical solution provided in the embodiments of this application, the outer shell body is provided with a plurality of second channels, one end of each second channel is the air outlet and the other end is the air inlet, and the air inlet is connected to the first air supply component; along the rotation direction of the rotary cup body, the air outlet is located downstream of the air inlet.

[0012] According to the technical solution provided in the embodiments of this application, the bottom of the rotary cup body is provided with an extension, the extension is sleeved on the outside of the powder conveying component, a fourth gap is formed between the inner wall of the extension and the outer wall of the powder conveying component, and a powder baffle is provided on the extension to prevent the powder coating sprayed by the powder conveying component from entering the fourth gap.

[0013] According to the technical solution provided in the embodiments of this application, the powder conveying assembly is fitted with a first main shaft, the first main shaft is connected to the main body of the rotary cup near the first opening end, the first main shaft is fitted with a first bearing, the outer ring of the first bearing is connected to the inner wall of the outer shell, and its inner ring is connected to the first main shaft; the end of the first main shaft away from the rotary cup body is connected to a driving component, the driving component is used to drive the first main shaft to rotate within the outer shell.

[0014] According to the technical solution provided in the embodiments of this application, a first gap is formed between the first main shaft and the inner wall of the outer shell body. An inflation component is provided outside the outer shell body. One end of the inflation component is connected to the end of the first gap away from the main body of the rotating cup, and is used to vent air into the first gap.

[0015] According to the technical solution provided in the embodiments of this application, the outer shell body is further provided with a powder blocking component, which is used to prevent the powder coating sprayed from the second opening from entering the first gap.

[0016] According to the technical solution provided in the embodiments of this application, a second space is formed between the bottom surface of the rotary cup body and the top surface of the outer shell body. The powder blocking component includes a transverse portion extending outward from the side of the main shaft near the rotary cup body. The transverse portion is disposed in the second space and is used to block the powder coating from entering the first gap.

[0017] According to the technical solution provided in the embodiments of this application, the first bearing is provided with a first sealing element near the main body of the rotary cup. The first sealing element is sleeved on the outside of the first main shaft. The side of the first sealing element near the first main shaft forms the first gap with the outer wall of the first main shaft. The side of the first sealing element away from the first main shaft forms a fifth space with the inner wall of the outer shell body that communicates with the first gap. The horizontal part is provided with a vertical part away from the first main shaft. The vertical part is inserted into the fifth space.

[0018] According to the technical solution provided in the embodiments of this application, there is a third space between the outer ring of the first bearing near the main body of the rotating cup, the side of the first seal away from the main body of the rotating cup, and the inner wall of the outer shell body. The third space is connected to the inflation assembly. The first seal is provided with a plurality of oblique channels in the circumferential direction. One end of each oblique channel is connected to the first gap, and the other end is connected to the third space.

[0019] According to the technical solution provided in the embodiments of this application, a second bearing is provided on the end of the first spindle away from the main body of the rotating cup. The outer ring of the second bearing is connected to the inner wall of the outer shell body, and its inner ring is connected to the first spindle.

[0020] In summary, this application proposes a powder electrostatic rotary cup, including a shell body, a powder-passing component inside which powder coating flows; a rotary cup body is connected to the upper end of the powder-passing component, and the rotary cup body and the powder-passing component are rotatably connected; the rotary cup body has a second opening in the circumferential direction; the powder coating can be sprayed out through the second opening; multiple air outlets are provided in the circumferential direction at the top of the shell body, one end of the air outlet is connected to an air supply component, and the airflow blown out of the air outlet can form an air curtain, which intersects with the flow path of the powder coating after being sprayed out through the second opening; a wind force regulating component is used to regulate the pressure of the airflow blown out of the air outlet; this application, by cooperating with the air blowing component and the air supply component, forms an air curtain that intersects with the flow path of the sprayed powder, and by regulating the pressure of the airflow blown out of the air outlet through the wind force regulating component, the flow rate of the gas sprayed out of the air outlet is regulated, thereby regulating the spray width of the powder coating sprayed out of the rotary cup body, thus improving the applicability of the electrostatic rotary cup. Attached Figure Description

[0021] Figure 1 A schematic diagram of the main structure of a powder electrostatic rotary cup provided in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the gas path structure of a powder electrostatic rotary cup provided in an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the overall structure of a powder electrostatic rotary cup provided in an embodiment of this application;

[0024] Figure 4 This is a front view of the molding cover of a powder electrostatic rotating cup provided in an embodiment of this application.

[0025] The text labels in the image represent:

[0026] 1. Outer shell; 2. Powder guiding assembly; 3. Rotary cup body; 4. Second opening; 5. Air outlet; 6. Dispersing disc; 7. Cup head body; 8. First channel; 9. Forming cover; 10. First protrusion; 11. Boss; 12. First fixing part; 13. Sixth space; 14. First air pipe connector; 15. First main shaft; 16. First bearing; 17. Drive assembly; 18. Second bearing; 19. Positioning sleeve; 20. Spring; 21. Fourth space; 22. Turbine 23. Blade; 24. Second fixing part; 25. First pressure ring; 26. Second air pipe connector; 27. First gap; 28. Lateral part; 29. ​​First seal; 30. Fifth space; 31. Vertical part; 32. Second gap; 33. Third space; 34. Angled channel; 35. Powder baffle; 36. Fourth gap; 37. Power supply component; 38. Carbon brush; 39. Conductive disk; 40. Mounting bracket; 41. Mounting branch pipe; 42. Support arm; 43. Second channel. Detailed Implementation

[0027] The present application 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, only the parts relevant to the invention are shown in the accompanying drawings.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] As mentioned in the background section, in view of the problems in the prior art, this application proposes a powder electrostatic rotating cup, comprising:

[0030] The outer shell body 1 has a first space inside and a first opening communicating with the first space at its top;

[0031] Powder-passing component 2, which is disposed in the first space and has a first channel 8 inside, through which powder coating flows;

[0032] The rotary cup body 3 is located on the outer shell body 1 near the first opening side, and its bottom end is rotatably connected to the powder conveying assembly 2. The rotary cup body 3 has a first cavity communicating with the first channel 8, and the rotary cup body 3 is provided with a second opening 4 around its circumference communicating with the first cavity; the powder coating can be sprayed out through the second opening 4.

[0033] The air blowing assembly includes a plurality of air outlets 5 disposed around the outer shell body 1. One end of each air outlet 5 is connected to the outside of the outer shell body 1, and the other end is connected to a first air supply assembly. The first air supply assembly is used to supply air to the air outlets 5. The airflow blown out from the air outlets 5 forms an air curtain. The air curtain intersects with the flow path of the powder coating after it is sprayed out from the second opening 4.

[0034] A wind force adjustment component, which is connected to the first air supply component, is used to adjust the pressure of the airflow blown out from the air outlet 5.

[0035] Please refer to Figure 1 , Figure 4 As shown, the outer shell 1 contains a powder conveying assembly 2. The powder conveying assembly 2 is made of insulating material, and its bottom is connected to an external powder feeding assembly. The powder feeding assembly continuously feeds the powder coating into the powder conveying assembly 2 from bottom to top. The rotary cup body 3 is located above the first opening. The rotary cup body 3 includes a dispersing disk 6 and a cup head body 7 from top to bottom. The dispersing disk 6 and the cup head body 7 are fixed together by screws. During the high-speed rotation of the rotary cup body 3, the powder coating is atomized and ejected at high speed from the periphery of the second opening 4, spraying onto the area to be coated. On the surface of the component, the air blowing assembly sprays compressed air through the air outlet 5 via the first air supply assembly. The compressed air forms an air curtain that intersects with the flow path of the powder coating after it is sprayed out from the second opening 4. By cooperating with the air blowing assembly and the first air supply assembly, an air curtain intersecting with the flow path of the sprayed powder is formed. The pressure of the airflow blown out from the air outlet is adjusted by the wind force adjustment assembly, thereby adjusting the flow rate of the gas sprayed out from the air outlet and adjusting the spray width of the powder coating sprayed out from the rotary cup body 3, thus improving the applicability of the electrostatic rotary cup.

[0036] In a preferred embodiment, the outer shell body 1 is provided with a plurality of second channels 42, one end of each second channel 42 is the air outlet 5, and the other end is the air inlet, the air inlet being connected to the first air supply component; along the rotation direction of the rotary cup body 3, the air outlet 5 is located downstream of the air inlet.

[0037] Please refer to Figure 1As shown, the first opening is provided with an annular molding cover 9. The inner wall of the top of the outer shell body 1 is provided with a first protrusion 10. The bottom of the molding cover 9 is provided with a ring of bosses 11. The first protrusion 10 and the bosses 11 abut against each other to restrict the movement of the molding cover 9 in the vertical direction. A second sealing ring is provided at the abutment of the first protrusion 10 and the bosses 11. The inner circumference of the molding cover 9 is provided with a plurality of second channels 42. The upper end of the second channel 42 is the air outlet 5, and the lower end of the second channel 42 is the air inlet. The first air supply component is connected to the air inlet. Along the rotation direction of the rotary cup body 3, the air outlet 5 is located downstream of the air inlet. The air outlet 5 has the same air outlet direction as the rotation direction of the rotary cup body 3, which can ensure that the sprayed powder is further dispersed after being sprayed out by the rotation of the rotary cup body 3. At the same time, the spray width of the sprayed powder can be adjusted.

[0038] In a preferred embodiment, the bottom of the rotary cup body 3 is provided with an extension, which is sleeved on the outside of the powder conveying assembly 2. A fourth gap 35 is formed between the inner wall of the extension and the outer wall of the powder conveying assembly 2. A powder baffle 34 is provided on the extension, which is used to prevent the powder coating sprayed by the powder conveying assembly 2 from entering the fourth gap 35.

[0039] Please refer to Figure 1 As shown, the bottom of the rotary cup body 3 has a downwardly extending extension, the bottom of which is connected to the first main shaft 15. The extension is placed outside the powder-passing assembly 2 and is tapered, thus forming a fourth gap 35 between the extension and the powder-passing assembly 2. The powder-blocking plate 34 is an annular baffle extending from the inner wall of the extension toward the powder-passing assembly 2. The end of the powder-blocking plate 34 away from the extension is positioned above the edge of the powder-passing assembly 2. When the powder-passing assembly 2 sprays the powder coating onto the rotary cup body 3, and the powder coating is sprayed out through the second opening 4, due to the impact force, a portion of the sprayed powder will bounce back downwards. The powder-blocking plate 34 can prevent the sprayed powder from entering the fourth gap 35. After the powder coating is blocked by the powder-blocking plate 34, the powder coating will pass through the powder-passing assembly 2 and be sprayed out through the second opening 4 together, improving the utilization efficiency of the powder coating.

[0040] In a preferred embodiment, the powder-passing assembly 2 is fitted with a first main shaft 15, which is connected to the rotary cup body 3 near the first opening end. The first main shaft 15 is fitted with a first bearing 16, the outer ring of which is connected to the inner wall of the outer shell body 1, and its inner ring is connected to the first main shaft 15. The end of the first main shaft 15 away from the rotary cup body 3 is connected to a drive assembly 17, which is used to drive the first main shaft 15 to rotate within the outer shell body 1.

[0041] Please refer to Figure 1 , Figure 2 As shown, the first main shaft 15 is a hollow structure. The top of the first main shaft 15 is threadedly connected to the extension at the bottom of the rotary cup body 3. A first fixing part 12 is sleeved on the first main shaft 15. The forming cover 9 is sleeved on the first fixing part 12. A third sealing ring is provided between the forming cover 9 and the first fixing part 12. A groove is provided in the middle of the first fixing part 12 towards the powder conveying assembly 2. This groove forms a sixth space 13 between itself and the inner wall of the outer shell body. The first air supply assembly includes a first air pipe connector 14. A first air source is connected to the lower part of the first air pipe connector 14. The upper end of the first air pipe connector 14 communicates with the sixth space 13. The top of the sixth space 13 is connected to each of the aforementioned air inlets; the first air source introduces compressed air into the sixth space 13, and the compressed air is ejected from the air outlet 5 through the second channel 42. When the supply pressure of the first air source is increased, the flow rate of the compressed air ejected through the second channel 42 increases, and when it intersects with the path of the sprayed powder ejected by the rotary cup body 3, the spray width of the sprayed powder will decrease; when the supply pressure of the first air source is decreased, the flow rate of the compressed air ejected through the second channel 42 decreases, and when it intersects with the path of the sprayed powder ejected by the rotary cup body 3, the degree of change in the spray width of the sprayed powder will decrease, thereby achieving the effect of changing the spray width of the sprayed powder.

[0042] In a preferred embodiment, the outer ring of the first bearing 16 is connected to the side of the first fixing part 12 near the first spindle 15, and is connected to the outer housing body 1 through the first fixing part 12, thereby restricting the rotation of the outer ring of the first bearing 16; the inner ring of the first bearing 16 is connected to the outer wall of the first spindle 15, and can be driven to rotate within the outer housing body 1 through the drive assembly 17.

[0043] Please refer to Figure 1 , Figure 2As shown, a fourth space 21 is provided at the lower end of the first fixing part 12. The drive assembly 17 is provided in the fourth space 21. The drive assembly 17 includes a turbine blade 22, which is fixedly connected to the lower end of the first main shaft 15. A second fixing part 23 is connected below the first fixing part 12. A first groove is provided on the side of the second fixing part 23 near the rotating cup body 3. The bottom of the first fixing part 12 is placed in the first groove. The first fixing part 12 is fixed to the second fixing part 23 by a first pressure ring 24. The second fixing part 23 also has a second air supply assembly that communicates with the fourth space 21. The second air supply assembly includes a second air pipe connector 25 fixed on the second fixing part 23. The upper end of the second air pipe connector 25 communicates with the fourth space 21, and the lower end of the second air pipe connector 25 communicates with a second air source. The second air source is used to supply compressed air into the fourth space 21. The compressed air can drive the turbine blade 22 to rotate. The turbine blade 22 drives the first main shaft 15 to rotate, thereby causing the first main shaft 15 to drive the rotating cup body 3 to rotate.

[0044] In a preferred embodiment, a first gap 26 is formed between the first spindle 15 and the inner wall of the outer shell body 1. An inflation component is provided outside the outer shell body 1. One end of the inflation component is connected to the end of the first gap 26 away from the rotating cup body 3, and is used to vent air into the first gap 26.

[0045] Please refer to Figure 1 , Figure 2 As shown, the first gap 26 is the gap formed between the first spindle 15 and the first fixing part 12 near the side of the first spindle 15. The inflation assembly includes an external air source and an inflation pipe. One end of the inflation pipe is connected to the external air source, and the other end passes through a pre-set pipe inside the outer shell 1 and is connected to the first gap 26. When the external air source is turned on, gas enters the first gap 26 through the inflation pipe and blows air towards the side near the rotary cup body 3, blowing out the powder coating that is about to enter the first gap 26. This can effectively prevent the powder from entering the interior of the first spindle 15, avoiding the first spindle from being affected by the force of the powder accumulated in the first gap 26, and ensuring the smooth progress of the spraying process.

[0046] In a preferred embodiment, the outer shell body 1 is further provided with a powder blocking component, which is used to prevent the powder coating sprayed from the second opening 4 from entering the first gap 26.

[0047] In a preferred embodiment, a second space is formed between the bottom surface of the rotary cup body 3 and the top surface of the outer shell body 1. The powder blocking component includes a transverse portion 27 extending outward from the side of the first main shaft 15 near the rotary cup body 3. The transverse portion 27 is disposed in the second space and is used to block the powder coating from entering the first gap 26.

[0048] Please refer to Figure 1 , Figure 2 As shown, the first spindle 15 is slightly higher than the outer shell 1 on the side near the main body 3 of the rotary cup. The distance by which the first spindle 15 extends outward must be greater than or equal to the width of the inlet of the first gap 26. The transverse portion 27 is between the main body 3 of the rotary cup and the outer shell 1, that is, the transverse portion 27 can cover the inlet of the first gap 26 to prevent the paint powder from entering the first gap 26 from the inlet, thereby causing structural damage to the inside of the first spindle 15.

[0049] In a preferred embodiment, the first bearing 16 is provided with a first sealing member 28 near the side of the rotating cup body 3. The first sealing member 28 is sleeved on the outside of the first spindle 15. The side of the first sealing member 28 near the first spindle 15 forms a first gap 26 with the outer wall of the first spindle 15, and the side away from the first spindle 15 forms a fifth space 29 with the inner wall of the outer casing body 1 that communicates with the first gap 26. The horizontal part 27 is provided with a vertical part 30 on the side away from the first spindle 15, and the vertical part 30 is inserted into the fifth space 29.

[0050] Please refer to Figure 1 , Figure 2 As shown, the top of the first fixing part 12 is sleeved outside the vertical part 30. After the vertical part 30 is inserted into the fifth space 29, an S-shaped gap is formed between its outer wall and the first fixing part 12 and the first sealing member 28. The top of the S-shaped gap is connected to the outside. The horizontal part 27 is placed above the first sealing member 28. A second gap 31 is formed between the horizontal part 27 and the first sealing member 28. The second gap 31 is connected to the first gap 26. Therefore, the inflation component vents air into the first gap 26, and the gas flows out through the S-shaped gap. In addition, even if the inflation component 26 is not working, the S-shaped gap can complicate the entry path of the powder coating, forming a special dustproof groove design structure, effectively avoiding the entry of the powder coating and better protecting the internal structure of the first main shaft 15.

[0051] In a preferred embodiment, a third space 32 is provided between the outer ring of the first bearing 16 near the side of the rotating cup body 3, the side of the first seal 28 away from the rotating cup body 3, and the inner wall of the outer shell body 1. The third space 32 is connected to the inflation assembly. The first seal 28 is provided with a plurality of oblique channels 33 in the circumferential direction. One end of each oblique channel 33 is connected to the first gap 26, and the other end is connected to the third space 32.

[0052] Please refer to Figure 1 , Figure 2 As shown, the third space 32 is formed between the side of the first sealing member 28 away from the main body 3 of the rotating cup and the inner wall of the first fixing part 12. The third space 32 is an annular cavity. The inflation component supplies air into the annular cavity. The oblique channel 33 has eight through holes arranged in a circumferential array on the first sealing member 28. The gas enters the first gap 26 along the oblique channel 33, which can realize the function of the gas pushing out the powder coating.

[0053] In a preferred embodiment, a second bearing 18 is fitted around the end of the first spindle 16 away from the main body 3. The outer ring of the second bearing 18 is connected to the inner wall of the outer shell 1, and its inner ring is connected to the first spindle 16.

[0054] Please refer to Figure 1 As shown, a second bearing 18 is provided below the first bearing 16 in the first space. The second bearing 18 is sleeved on the outside of the first main shaft 15. The outer ring of the second bearing 18 is connected to the first fixing part 12, and its inner ring is connected to the outer wall of the first main shaft 15. The connection relationship between the second bearing 18 and the first bearing 16 and the first main shaft 15 is the same. The second bearing 18 and the first bearing 16 cooperate with each other to stabilize the rotation process of the first main shaft 15.

[0055] Please refer to Figure 1 As shown, a positioning assembly is provided on the outer sleeve of the first spindle 15. The positioning assembly is rotatably connected to the first spindle 15 and is located between the first bearing 16 and the second bearing 18. The positioning assembly includes a bearing positioning sleeve 19, which is sleeved on the outer wall of the first spindle 15. The two ends of the positioning sleeve 19 are respectively connected to the outer rings of the first bearing 16 and the second bearing 18. The positioning sleeve 19 is used to fix the two and prevent them from moving up and down. The positioning assembly also includes a spring 20 sleeved on the outer sleeve 19. The bottom of the spring 20 abuts against a connecting ring, which is fixedly connected to the outer ring of the second bearing 18.

[0056] Please refer to Figure 1As shown, a power supply component 36 is fixed on the second fixing part 23. A carbon brush 37 is connected to the upper end of the power supply component 36. The carbon brush 37 is placed in the fourth space 21. A conductive disk 38 is fixedly connected below the turbine blade 22. The conductive disk 38 rotates together with the turbine blade 22. The carbon brush 37 is charged through contact with the turbine blade 22, thereby charging the first main shaft 15. The first main shaft 15 further charges the rotary cup body 3. At the same time, the fixing screw on the rotary cup body 3 is also charged. The powder coating sprayed by the powder conveying component 2 is charged through the inductive charging of the rotary cup body 3 and the contact charging of the fixing screw, thereby improving the charging effect of the powder coating.

[0057] Please refer to Figure 3 As shown, a mounting bracket 39 is screwed to the lower part of the outer shell body 1. The mounting bracket 39 is connected to the second fixing part 23 through a mounting branch pipe 40. The mounting branch pipe 40 is screwed to the mounting bracket 39 for fixation. The lower end of the power supply component 36 is also fixed on the mounting bracket 39. A support arm 41 is connected to the mounting bracket 39 away from the first opening end. The powder electrostatic rotary cup can be connected to the spraying auxiliary equipment through the support arm 41.

[0058] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A powder electrostatic rotating cup, characterized in that, include: The outer shell body (1) has a first space inside and a first opening communicating with the first space at its top; Powder coating component (2), wherein the powder coating component (2) is disposed in the first space and has a first channel (8) inside, wherein powder coating flows in the first channel (8); The rotary cup body (3) is located on the outer shell body (1) near the first opening side, and its bottom end is rotatably connected to the powder conveying assembly (2). The rotary cup body (3) has a first cavity communicating with the first channel (8), and the rotary cup body (3) is provided with a second opening (4) communicating with the first cavity around its circumference; the powder coating is sprayed out from the second opening (4). The air blowing assembly includes multiple air outlets (5) arranged around the outer shell body (1). One end of the air outlet (5) is connected to the outside of the outer shell body (1), and the other end is connected to a first air supply assembly. The first air supply assembly is used to supply air to the air outlet (5). An annular molding cover (9) is provided at the first opening. Multiple second channels (42) are arranged around the inner circumference of the molding cover (9). The upper end of the second channel (42) is the air outlet (5), and the lower end of the second channel (42) is the air inlet. The first air supply assembly is connected to the air inlet. Along the rotation direction of the rotary cup body (3), the air outlet (5) is located downstream of the air inlet. The air outlet (5) has the same air outlet direction as the rotation direction of the rotary cup body (3). The airflow blown out by the air outlet (5) forms an air curtain. The air curtain intersects with the flow path of the powder coating after being sprayed out from the second opening (4). A wind force regulating component is connected to the first air supply component and is used to regulate the pressure of the airflow blown out from the air outlet (5); The powder-passing assembly (2) is fitted with a first main shaft (15), which is connected to the rotary cup body (3) near the first opening end. The first main shaft (15) is fitted with a first bearing (16), the outer ring of which is connected to the inner wall of the outer shell body (1), and its inner ring is connected to the first main shaft (15). The end of the first main shaft (15) away from the rotary cup body (3) is connected to a drive assembly (17), which is used to drive the first main shaft (15) to rotate inside the outer shell body (1). A first gap (26) is formed between the first main shaft (15) and the inner wall of the outer shell body (1). An inflation component is provided outside the outer shell body (1). One end of the inflation component is connected to the end of the first gap (26) away from the main body (3) for venting air into the first gap (26). The outer shell body (1) is also provided with a powder blocking component, which is used to prevent the powder coating sprayed out from the second opening (4) from entering the first gap (26); A second space is formed between the bottom surface of the rotary cup body (3) and the top surface of the outer shell body (1). The powder blocking assembly includes a transverse portion (27) extending outward from the side of the main shaft near the rotary cup body (3). The transverse portion (27) is located in the second space and is used to block the powder coating from entering the first gap (26). The first bearing (16) is provided with a first seal (28) on the side near the main body (3). The first seal (28) is sleeved on the outside of the first main shaft (15). The side of the first seal (28) near the first main shaft (15) forms the first gap (26) with the outer wall of the first main shaft (15). The side away from the first main shaft (15) forms a fifth space (29) with the inner wall of the outer shell body (1) that communicates with the first gap (26). The horizontal part (27) is provided with a vertical part (30) on the side away from the first main shaft (15). The vertical part (30) is inserted into the fifth space (29). The outer ring of the first bearing (16) is close to the side of the main body (3), and the first seal (28) is away from the main body (3) and the inner wall of the outer shell body (1) have a third space (32), which is connected to the inflation assembly; the first seal (28) is provided with a plurality of oblique channels (33) in the circumferential direction, one end of each oblique channel (33) is connected to the first gap (26), and the other end is connected to the third space (32).

2. The powder electrostatic rotating cup according to claim 1, characterized in that: The bottom of the rotary cup body (3) is provided with an extension, which is sleeved on the outside of the powder conveying assembly (2). A fourth gap (35) is formed between the inner wall of the extension and the outer wall of the powder conveying assembly (2). A powder baffle (34) is provided on the extension, which is used to prevent the powder coating sprayed by the powder conveying assembly (2) from entering the fourth gap (35).

3. The powder electrostatic rotating cup according to claim 2, characterized in that: The first spindle (15) is fitted with a second bearing (18) at the end away from the main body (3). The outer ring of the second bearing (18) is connected to the inner wall of the outer shell body (1), and its inner ring is connected to the first spindle (15).

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