Electrostatic powder spraying equipment

Abstract

The utility model provides an electrostatic powder spraying device, which relates to the technical field of powder spraying, and comprises a shell, a clamping mechanism, a driving mechanism and a spraying mechanism, a spraying bin is arranged in the shell, the clamping mechanism is arranged in the spraying bin, the clamping mechanism is used for clamping a workpiece to be sprayed, and the driving mechanism is used for driving the spraying mechanism to rotate. The driving mechanism is in transmission connection with the clamping mechanism so as to drive the clamping mechanism to rotate, the spraying mechanism comprises a spraying head, the spraying head is located in the spraying bin and located on one side of the clamping mechanism, and the spraying head is used for conducting electrostatic powder spraying on a to-be-sprayed workpiece clamped on the clamping mechanism. The workpiece is kept rotating in the spraying process, so that the spraying head can spray the workpiece from multiple angles, and the spraying uniformity and completeness are ensured.

Description

Technical Field

[0001] This utility model relates to the field of powder coating technology, and more specifically, to an electrostatic powder coating device. Background Technology

[0002] High-voltage electrostatic powder coating technology, as an important surface treatment process in modern industry, has been widely used in the automotive parts manufacturing field due to its significant advantages of being environmentally friendly and pollution-free, having high material utilization, and low energy consumption. This technology uses a high-voltage electrostatic field to charge powder coating particles, which are then uniformly adsorbed onto the workpiece substrate surface by the electric field force. After thermosetting, a dense protective coating with excellent adhesion is formed.

[0003] High-voltage electrostatic powder coating in related technologies relies on manual operation, where operators hold electrostatic powder spray guns to spray each workpiece individually. This not only results in low production efficiency and high labor intensity for workers, but also makes it difficult to ensure uniform coating results, often leading to missed or over-spraying, which seriously affects the appearance quality and coating performance of the product. Utility Model Content

[0004] The problem this invention addresses is: how to provide an electrostatic powder coating equipment that can improve production efficiency and ensure uniform coating.

[0005] To address the aforementioned problems, this utility model provides an electrostatic powder coating device, comprising a housing, a clamping mechanism, a driving mechanism, and a coating mechanism. The housing contains a coating chamber, and the clamping mechanism is disposed within the coating chamber. The clamping mechanism is used to clamp the workpiece to be coated. The driving mechanism is connected to the clamping mechanism to drive the clamping mechanism to rotate. The coating mechanism includes a nozzle located within the coating chamber and on one side of the clamping mechanism. The nozzle is used to perform electrostatic powder coating on the workpiece clamped by the clamping mechanism.

[0006] Optionally, the clamping mechanism includes a clamping frame, which is rotatably connected to the inner wall of the spraying chamber via a rotating shaft. The clamping frame is provided with a placement platform for placing the workpiece to be sprayed. Multiple threaded rods are provided above the placement platform, and the threaded rods are rotatably connected to the clamping frame. One end of each threaded rod is provided with a clamping plate, which is used to clamp the workpiece to be sprayed placed on the placement platform.

[0007] Optionally, the clamping frame is further provided with a mounting block, the mounting block is provided with a threaded through hole, the threaded rod is threadedly connected to the threaded through hole, one end of the threaded rod extends out of the threaded through hole and is connected to the clamping plate, and the other end of the threaded rod extends out of the threaded through hole and is connected to a rotating handle.

[0008] Optionally, the drive mechanism includes a rotary motor, a drive wheel, and a driven wheel. The output end of the rotary motor is coaxially connected to the drive wheel, and the drive wheel is meshed with the driven wheel. One end of the rotating shaft extends out of the outside of the spray booth and is coaxially connected to the driven wheel.

[0009] Optionally, the spraying mechanism further includes a powder supply cylinder, a powder supply pipe, and an electrostatic generator. The powder supply cylinder is connected to the spray head through the powder supply pipe, and the electrostatic generator is connected to the spray head.

[0010] Optionally, a cover plate is connected to the powder supply cylinder, and a stirring motor is provided on the cover plate. The output end of the stirring motor passes through the cover plate and is connected to a stirring paddle. When the cover plate is connected to the powder supply cylinder, the stirring paddle is located inside the powder supply cylinder.

[0011] Optionally, the cover plate is provided with an observation hole for observing the amount of powder remaining in the powder supply cylinder.

[0012] Optionally, a door panel is rotatably connected to the opening of the spraying chamber.

[0013] Optionally, the bottom of the spraying chamber is provided with a powder collection port, the lower end of which is connected to a powder collection pipe, and the lower end of the powder collection pipe is threaded with a sealing cap.

[0014] Optionally, the bottom of the spraying chamber and the powder collection port are provided with a downwardly sloping surface.

[0015] The beneficial effects of this electrostatic powder coating equipment are as follows: A spray chamber is provided within the housing, offering space for electrostatic powder coating. A clamping mechanism is located within the spray chamber and is used to clamp the workpiece to be coated, fixing it in place during the coating process and facilitating the coating operation. A drive mechanism is connected to the clamping mechanism. The drive mechanism rotates the clamping mechanism and the workpiece it holds within the spray chamber, helping to achieve multi-angle coating of the workpiece and improving the uniformity and efficiency of the coating. The coating mechanism includes a nozzle located within the spray chamber and on one side of the clamping mechanism. The nozzle can be positioned, for example, above the clamping mechanism, for electrostatic powder coating of the workpiece held by the clamping mechanism. Electrostatic powder coating technology utilizes a high-voltage electrostatic field to charge powder coating particles, which are then uniformly adsorbed onto the workpiece surface by the electric field force. During operation, the workpiece to be coated is first fixed by the clamping mechanism, then the drive mechanism is activated to rotate the clamping mechanism and the workpiece within the spray chamber. Simultaneously, the nozzle of the coating mechanism begins electrostatic powder coating of the workpiece. As the workpiece rotates, the spray nozzle can spray different parts of the workpiece, ensuring the uniformity and integrity of the coating.

[0016] This utility model's electrostatic powder coating equipment, through automated spraying, significantly reduces worker workload and improves spraying efficiency compared to traditional manual handheld spray gun spraying. Because the workpiece rotates during spraying, the nozzle can spray from multiple angles, ensuring uniformity and integrity of the coating, reducing missed or overspraying, and improving product appearance quality and coating performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of a clamping mechanism and a driving mechanism according to the present invention;

[0019] Figure 3 This is a schematic diagram of the overall structure of a spraying mechanism according to the present invention;

[0020] Figure 4 This is a schematic diagram of the overall structure of a cover plate according to the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Shell; 11. Spraying chamber; 12. Chamber door panel; 13. Powder collection port; 14. Powder collection pipe; 15. Sealing cover; 16. Inclined surface; 2. Clamping mechanism; 21. Clamping frame; 211. Placement platform; 212. Mounting block; 2121. Threaded through hole; 22. Rotating shaft; 23. Threaded rod; 231. Clamping plate; 232. Rotating handle; 3. Drive mechanism; 31. Rotary motor; 32. Drive wheel; 33. Driven wheel; 4. Spraying mechanism; 41. Spray nozzle; 42. Powder supply cylinder; 421. Cover plate; 422. Stirring motor; 423. Stirring paddle; 424. Observation hole; 43. Powder supply pipe; 44. Electrostatic generator. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0024] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0025] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0026] like Figure 1 , Figure 2 As shown in the figure, an electrostatic powder coating device provided by this utility model includes a housing 1, a clamping mechanism 2, a driving mechanism 3, and a spraying mechanism 4. The housing 1 is provided with a spraying chamber 11. The clamping mechanism 2 is disposed in the spraying chamber 11 and is used to clamp the workpiece to be sprayed. The driving mechanism 3 is connected to the clamping mechanism 2 to drive the clamping mechanism 2 to rotate. The spraying mechanism 4 includes a nozzle 41, which is located in the spraying chamber 11 and on one side of the clamping mechanism 2. The nozzle 41 is used to perform electrostatic powder coating on the workpiece to be sprayed clamped on the clamping mechanism 2.

[0027] Specifically, the spraying chamber 11 provides a closed working environment for accommodating the workpiece to be sprayed and for performing the spraying operation. This helps control dust diffusion during the spraying process, protects the health of operators, and maintains a good spraying environment. The clamping mechanism 2 is rotatably connected within the spraying chamber 11 to firmly clamp the workpiece to be sprayed. Driven by the drive mechanism 3, it rotates, allowing different parts of the workpiece to be exposed sequentially under the nozzle 41, enabling omnidirectional or angled spraying. The drive mechanism 3 is connected to the clamping mechanism 2, providing rotational power to drive the clamping mechanism 2 and the workpiece on it to rotate. During electrostatic powder coating, the position of the workpiece is automatically changed by the drive mechanism 3, reducing manual operation and improving spraying efficiency and uniformity. The spraying mechanism 4 includes a nozzle 41 located within the spraying chamber 11 and above the clamping mechanism 2. The nozzle 41 uses electrostatic powder coating technology to uniformly spray charged powder coating particles onto the surface of the rotating workpiece. The electrostatic effect causes the powder particles to adhere tightly to the workpiece, and a high-quality coating is subsequently formed through a curing process.

[0028] In this embodiment, the combination of an automated rotating clamping mechanism 2 and a fixed-position spray head 41 enables continuous and uniform spraying of the workpiece. Compared to manual handheld spray guns, this significantly improves spraying efficiency and coating uniformity, reducing missed or overspraying. It reduces the need for direct manual intervention in the spraying process, lowers the labor intensity of operators, improves the working environment, and minimizes the impact of human factors on spraying quality. Automated control ensures consistent spraying, contributing to improved coating adhesion, density, and overall quality, thereby enhancing the appearance and performance of the final product.

[0029] Optionally, such as Figure 2 As shown, the clamping mechanism 2 includes a clamping frame 21, which is rotatably connected to the inner wall of the spraying chamber 11 via a rotating shaft 22. The clamping frame 21 is provided with a placement platform 211 for placing the workpiece to be sprayed. Multiple threaded rods 23 are provided above the placement platform 211, and the threaded rods 23 are rotatably connected to the clamping frame 21. One end of the threaded rod 23 is provided with a clamping plate 231, which is used to clamp the workpiece to be sprayed placed on the placement platform 211.

[0030] Specifically, the clamping frame 21 is rotatably connected to the inner wall of the spraying chamber 11 via a rotating shaft 22. The clamping frame 21 and all its components (including the workpiece to be sprayed) can rotate around the rotating shaft 22 under the drive of the drive mechanism 3, so that the workpiece can uniformly receive the powder coating from the spray nozzle 41 during the spraying process, thereby improving the uniformity and efficiency of the spraying. The placement platform 211 is a plane set on the clamping frame 21 to support the workpiece to be sprayed, providing a stable platform to ensure that the workpiece will not be affected by shaking or tilting during the spraying process. Multiple threaded rods 23 are rotatably connected to the clamping frame 21, and each threaded rod 23 has a clamping plate 231 at its lower end. When the threaded rod 23 rotates, due to the transmission action of the thread, the clamping plate 231 will move up and down along the threaded rod 23, allowing the user to adjust the position of the clamping plate 231 according to the size and shape of the workpiece, thereby achieving the clamping of the workpiece. Once the clamping plate 231 is tightly attached to the workpiece, it can ensure that the workpiece remains stable during the spraying process and prevent spraying defects caused by movement or falling off.

[0031] In this optional embodiment, through the synergistic action of the rotating shaft 22 and the clamping frame 21, the workpiece can uniformly receive powder coating during the spraying process, thereby avoiding the problem of uneven spraying caused by the fixed position of the workpiece. The placement table 211 provides a stable support platform, and the combination of the threaded rod 23 and the clamping plate 231 allows the user to adjust it according to the specific situation of the workpiece, ensuring that the workpiece remains stable during the spraying process, reducing movement or falling off during the spraying process, thereby improving the spraying quality and efficiency. Since the threaded rod 23 and the clamping plate 231 can be adjusted in position, the clamping mechanism 2 can adapt to workpieces of different sizes and shapes, thereby improving the versatility and practicality of the equipment.

[0032] Optionally, such as Figure 2 As shown, the clamping frame 21 is also provided with a mounting block 212. The mounting block 212 is provided with a threaded through hole 2121. The threaded rod 23 is threadedly connected to the threaded through hole 2121. One end of the threaded rod 23 extends out of the threaded through hole 2121 and is connected to the clamping plate 231. The other end of the threaded rod 23 extends out of the threaded through hole 2121 and is connected to a rotating handle 232.

[0033] Specifically, a mounting block 212 is added to the clamping frame 21, and a threaded through hole 2121 is opened on the mounting block 212, so that the threaded rod 23 can be fixed to the mounting block 212 by threaded connection, which not only ensures the stability of the connection, but also facilitates subsequent adjustment and maintenance. The upper end of the threaded rod 23 extends out of the threaded through hole 2121 and is connected to the rotating handle 232, so that the user can easily rotate the threaded rod 23 without the use of additional tools, simplifying the operation process and improving work efficiency. The lower end of the threaded rod 23 also extends out of the threaded through hole 2121 and is connected to the clamping plate 231. When the rotating handle 232 drives the threaded rod 23 to rotate, due to the transmission action of the thread, the clamping plate 231 will move up and down along the threaded rod 23, so that the user can adjust the position of the clamping plate 231 by rotating the handle 232 according to the size and shape of the workpiece, thereby realizing the clamping or release of the workpiece.

[0034] In this optional embodiment, the introduction of the rotating handle 232 allows the user to easily rotate the threaded rod 23 and adjust the position of the clamping plate 231, simplifying the operation process, reducing operational difficulty, and improving work efficiency. The threaded connection ensures a stable connection between the threaded rod 23 and the mounting block 212, avoiding unstable clamping or spraying defects caused by loose connection.

[0035] Optionally, such as Figure 2As shown, the drive mechanism 3 includes a rotary motor 31, a drive wheel 32 and a driven wheel 33. The output end of the rotary motor 31 is coaxially connected to the drive wheel 32. The drive wheel 32 and the driven wheel 33 are meshed together. One end of the rotating shaft 22 extends out of the outside of the spraying chamber 11 and is coaxially connected to the driven wheel 33.

[0036] Specifically, a rotary motor 31, acting as a power source, is connected to the outer wall of the spraying chamber 11. When the rotary motor 31 starts, its output end begins to rotate, providing the necessary power. The output end of the rotary motor 31 is coaxially connected to the drive wheel 32, and the drive wheel 32 and the driven wheel 33 are meshed together through a toothed structure, ensuring smooth and effective power transmission. When the drive wheel 32 rotates, its toothed structure drives the driven wheel 33 to rotate at the same speed or at a certain proportional speed. One end of the rotating shaft 22 extends out of the outer side of the spraying chamber 11 and is coaxially connected to the driven wheel 33. Therefore, when the driven wheel 33 rotates, the rotating shaft 22 also rotates accordingly. The clamping mechanism 2 is rotatably connected to the inner wall of the spraying chamber 11 through the rotating shaft 22, so the rotation of the rotating shaft 22 will drive the clamping mechanism 2 and the workpiece clamped thereon to rotate together.

[0037] In this optional embodiment, the rotation of the drive mechanism 3 allows the clamping mechanism 2 and the workpiece to be coated to uniformly receive powder coating from the spray nozzle 41, thereby avoiding uneven coating caused by a fixed workpiece position and improving coating quality and overall product aesthetics. The meshing connection between the drive wheel 32 and the driven wheel 33 ensures smooth power transmission, reduces power loss and fluctuations during power transmission, and makes the rotational motion more stable and reliable.

[0038] Optionally, such as Figure 3 As shown, the spraying mechanism 4 also includes a powder supply cylinder 42, a powder supply pipe 43, and an electrostatic generator 44. The powder supply cylinder 42 is connected to the spray head 41 through the powder supply pipe 43, and the electrostatic generator 44 is connected to the spray head 41.

[0039] Specifically, the powder supply cylinder 42, serving as a storage container for the powder coating, is connected to the top of the housing 1 and contains an appropriate amount of powder coating for supplying the spraying operation. The powder supply cylinder 42 typically includes a sealing structure and a stirring device to ensure long-term preservation and uniform supply of the powder coating. The powder supply pipe 43 connects the powder supply cylinder 42 and the nozzle 41, conveying the powder coating from the powder supply cylinder 42 to the nozzle 41. The powder supply pipe 43 typically contains a conveying device (such as a screw conveyor or pneumatic conveying system) to ensure a continuous and uniform supply of the powder coating. Simultaneously, the powder supply pipe 43 must also prevent powder blockage and leakage. The electrostatic generator 44 is also connected to the top of the housing 1 and to the nozzle 41. The electrostatic generator 44 generates a high-voltage electrostatic field, causing the powder coating sprayed from the nozzle 41 to acquire an electrostatic charge. When the charged powder coating comes into contact with the workpiece to be sprayed, due to electrostatic adsorption, the powder coating adheres tightly to the workpiece surface. Electrostatic spraying helps improve spraying efficiency and coating quality. The nozzle 41 is located inside the spray chamber 11 and above the clamping mechanism 2. It is responsible for spraying the powder coating delivered by the powder supply pipe 43 in the form of a mist, and is simultaneously subjected to the high-voltage electrostatic field generated by the electrostatic generator 44. The setting of the nozzle 41 needs to take into account parameters such as spray angle, spray speed and spray volume to ensure that the powder coating can uniformly and efficiently cover the workpiece to be sprayed.

[0040] In this optional embodiment, electrostatic spraying allows the powder coating to adhere tightly to the surface of the workpiece, reducing paint waste and environmental pollution. Simultaneously, electrostatic adsorption results in more uniform paint distribution, improving spraying efficiency. Electrostatic spraying achieves high coating thickness uniformity and adhesion, making the coating more robust and durable, thus improving the overall quality and aesthetics of the product. Furthermore, the spraying mechanism 4 in this embodiment can adapt to workpieces of different sizes and shapes. By adjusting the powder supply, electrostatic voltage, and nozzle 41 parameters, it can meet the customized needs of different customers, demonstrating strong adaptability.

[0041] Optionally, such as Figure 3 , Figure 4 As shown, a cover plate 421 is connected to the powder supply cylinder 42, and a stirring motor 422 is provided on the cover plate 421. The output end of the stirring motor 422 passes through the cover plate 421 and is connected to a stirring paddle 423. When the cover plate 421 is connected to the powder supply cylinder 42, the stirring paddle 423 is located inside the powder supply cylinder 42.

[0042] Specifically, the cover plate 421, as a sealing component of the powder supply cylinder 42, is tightly connected to the top of the powder supply cylinder 42 through appropriate connection methods (such as bolts, clips, etc.), ensuring the sealing of the powder supply cylinder 42 and facilitating the disassembly and cleaning of the cover plate 421. The stirring motor 422 is mounted on the cover plate 421, with its output end passing through the cover plate 421 and extending into the powder supply cylinder 42. The design of the stirring motor 422 must consider factors such as its power, speed, and noise level to ensure it can meet the requirements for stirring powder coatings without interfering with the operator. The stirring paddle 423 is connected to the output end of the stirring motor 422. When the stirring motor 422 is started, the stirring paddle 423 rotates inside the powder supply cylinder 42. The design of the stirring paddle 423 must consider factors such as its shape, length, and material to ensure effective stirring of the powder coatings and prevent clumping and deposition. Simultaneously, the stirring paddle 423 must also possess sufficient strength and wear resistance to extend its service life. During the spraying operation, the stirring motor 422 runs continuously, and the stirring paddle 423 rotates continuously inside the powder supply cylinder 42, ensuring that the powder coating is evenly dispersed within the powder supply cylinder 42 and avoiding clumping and deposition problems caused by prolonged standing. At the same time, the stirring process also helps to improve the flowability of the powder coating, making it easier to be delivered to the spray head 41 through the powder supply pipe 43.

[0043] In this optional embodiment, the powder coating in the powder supply cylinder 42 is kept uniformly dispersed by the continuous stirring of the stirring paddle 423, avoiding uneven spraying caused by agglomeration and deposition, which helps to improve the spraying quality and the overall aesthetics of the product. The stirring device ensures that the powder coating in the powder supply cylinder 42 is always in a flowing state, thereby ensuring the continuity and stability of the spraying operation, helping to reduce the failure rate and downtime during the spraying process, and improving production efficiency.

[0044] Optionally, such as Figure 4 As shown, the cover plate 421 is provided with an observation hole 424 for observing the amount of powder remaining in the powder supply cylinder 42.

[0045] Specifically, the observation hole 424, as an opening on the cover plate 421, requires careful design in size and position to ensure that operators can clearly see the powder coating inside the powder supply cylinder 42. The design of the observation hole 424 also needs to consider its sealing and safety to prevent powder coating leakage or operator injury. During the spraying operation, operators can directly observe the remaining powder in the powder supply cylinder 42 through the observation hole 424. This observation method is convenient and quick, without interrupting the spraying operation or opening the cover plate 421, thus improving work efficiency and safety. By observing the observation hole 424, operators can roughly judge the remaining amount of powder coating in the powder supply cylinder 42, so as to replenish the powder coating in a timely manner and avoid interruption of the spraying operation. At the same time, the observation hole 424 can also help operators understand the distribution of the powder coating, so as to make necessary stirring or adjustments.

[0046] In this optional embodiment, the observation hole 424 allows the operator to observe the remaining powder in the powder supply cylinder 42 without opening the cover plate 421, thus avoiding interruptions and wasted time caused by frequent opening of the cover plate 421, and helping to improve the efficiency and continuity of the spraying operation. During the spraying operation, opening the cover plate 421 may lead to powder coating leakage or operator injury. The observation hole 424 avoids this risk, allowing the operator to observe the remaining powder in the powder supply cylinder 42 without contacting the powder coating, thereby improving operational safety. The observation hole 424 also helps the operator to promptly detect insufficient powder coating in the powder supply cylinder 42 for timely replenishment, avoiding problems such as decreased spraying quality and equipment damage due to insufficient powder coating, thereby reducing equipment maintenance costs. Furthermore, by observing the observation hole 424, the operator can understand the distribution of powder coating in the powder supply cylinder 42 for necessary stirring or adjustment, helping to ensure the uniformity and stability of the powder coating during the spraying process, thereby improving the quality and efficiency of the spraying operation.

[0047] Optionally, such as Figure 1 As shown, a door panel 12 is rotatably connected to the opening of the spraying chamber 11.

[0048] Specifically, the door panel 12 is connected to the opening edge of the spray booth 11 via a rotating connector (such as a hinge, shaft, etc.), allowing the door panel 12 to rotate within a certain angle range, typically from a fully closed position to a fully open position, or vice versa. When it is necessary to enter the spray booth 11 for maintenance, parts replacement, or cleaning, the operator can manually or mechanically push the door panel 12 to rotate it around the rotating connector, thereby opening the opening of the spray booth 11. Conversely, when spraying begins, the door panel 12 needs to be closed to ensure the airtightness of the spray booth 11 and prevent powder coating leakage. To ensure the airtightness of the spray booth 11 when the door panel 12 is closed, a sealing strip or gasket can be installed between the door panel 12 and the opening edge of the spray booth 11. When the door panel 12 is closed, the sealing strip or gasket will fit tightly, preventing powder coating from leaking out from gaps.

[0049] In this optional embodiment, the rotatable connection of the door panel 12 makes opening and closing the spray booth 11 more convenient and quick, thereby improving the efficiency of the spraying operation. During the spraying operation, the inside of the spray booth 11 may be filled with high-pressure gas and powder coating. The rotatable connection and sealing of the door panel 12 help prevent these harmful substances from leaking into the external environment, thereby protecting the safety of the operators.

[0050] Optimizing coating quality: The tight closure and sealing of the door panel 12 ensures more uniform airflow and powder coating distribution inside the coating chamber 11, which helps improve the quality of the coating operation. At the same time, the sealing also prevents external air and impurities from entering the coating chamber 11 and affecting the coating effect.

[0051] Optionally, such as Figure 1 , Figure 2 As shown, the bottom of the spraying chamber 11 is provided with a powder collection port 13, the lower end of the powder collection port 13 is connected to a powder collection pipe 14, and the lower end of the powder collection pipe 14 is threadedly connected to a sealing cap 15.

[0052] Specifically, the powder collection port 13, as an opening at the bottom of the spray chamber 11, is positioned and sized to ensure efficient collection of powder scattered during the spraying process. The powder collection port 13 is typically located at the lowest point of the spray chamber 11 to allow powder to flow naturally under gravity. The upper end of the powder collection pipe 14 is connected to the powder collection port 13, and the lower end is threadedly connected to the sealing cap 15. The powder collection pipe 14 collects and stores the powder falling through the powder collection port 13. The sealing cap 15 is threadedly connected to the lower end of the powder collection pipe 14, facilitating installation and removal while providing a reliable seal to prevent powder leakage during collection. After the spraying operation is completed, the operator can open the sealing cap 15, remove the powder collection pipe 14 from the spray chamber 11, pour the collected powder into a designated container, and then re-thread the sealing cap 15 back onto the powder collection pipe 14.

[0053] In this optional embodiment, the powder collection port 13 and powder collection pipe 14 can effectively collect the powder scattered during the spraying process and reuse it, which helps to improve the powder utilization rate and reduce production costs. The scattering and leakage of powder coatings can cause some environmental pollution. The powder collection port 13 and sealing cap 15 can prevent powder leakage during the collection process, thereby reducing environmental pollution. The powder collection port 13, powder collection pipe 14, and sealing cap 15 make the powder collection and storage process more efficient and convenient, thereby improving the efficiency of the spraying operation. Operators do not need to spend too much time and energy on powder collection and storage, and can focus more on the spraying operation itself.

[0054] Optionally, such as Figure 1 , Figure 2 As shown, a downwardly sloping surface 16 is provided between the bottom of the spraying chamber 11 and the powder collection port 13.

[0055] Specifically, the inclined surface 16 serves as a transition between the bottom of the spray chamber 11 and the powder collection port 13. Its inclination angle and length must consider factors such as powder flowability, the size of the spray chamber 11, and the location of the powder collection port 13 to ensure that the powder can flow smoothly from the bottom of the chamber to the collection port. During the spraying operation, scattered powder will fall onto the inclined surface 16. Due to the inclined surface 16, the powder will be subject to gravity and flow downwards along the inclined surface 16 until it reaches the powder collection port 13. The powder collection port 13 is located at the lower end of the inclined surface 16 and is responsible for receiving the powder flowing down from the inclined surface 16. The size and shape of the powder collection port 13 must ensure that it can efficiently receive and accommodate the powder flowing down from the inclined surface 16.

[0056] In this optional embodiment, the inclined surface 16 allows the powder to flow more smoothly to the powder collection port 13, thereby reducing the residence time and dispersion range of the powder in the spray chamber 11, which helps to improve the powder collection efficiency and reduce powder waste. The inclined surface 16 can more effectively utilize the internal space of the spray chamber 11, allowing the powder to flow more concentratedly to the collection port, helping to reduce powder accumulation and dust buildup inside the spray chamber 11, keeping the spray chamber 11 clean and tidy. Because the inclined surface 16 makes it easier for the powder to flow to the collection port, the cleaning and maintenance of the inside of the spray chamber 11 also becomes simpler and more convenient. Operators can more easily clean up powder that has fallen onto the inclined surface 16, thereby reducing the workload of cleaning and maintenance.

[0057] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

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