An enclosed powder spraying chamber

Abstract

The utility model relates to electrostatic powder spraying equipment technical field discloses a closed powder spraying chamber, including import hand supplementary work chamber, powder spraying work chamber and export hand supplementary work chamber, is provided with import platform directional clear blowing device in import hand supplementary work chamber, and the blowing direction of import platform directional clear blowing device is toward powder spraying work chamber, is provided with export platform directional clear blowing device in export hand supplementary work chamber, and the blowing direction of export platform directional clear blowing device is toward powder spraying work chamber, is provided with annular clear blowing device in powder spraying work chamber, and the bottom of powder spraying work chamber is equipped with the dropping chute, and one end of dropping chute is connected with the suction pipeline, to make the powder in powder spraying work chamber discharge through dropping chute and suction pipeline. The closed powder spraying chamber has good powder overflow prevention effect, can solve the problem of production environment pollution caused by powder overflow and dispersion, and effectively improves the spraying efficiency and spraying quality.

Description

Technical Field

[0001] This utility model relates to the technical field of electrostatic powder coating equipment, specifically to a closed powder spraying chamber. Background Technology

[0002] Electrostatic powder coating is a common process for workpiece surface treatment. Due to its advantages such as strong coating adhesion and excellent corrosion resistance, it is widely used in the processing of hardware, machinery, and home appliances. The powder coating chamber is the space where the coating operation takes place. During the coating process, some powder that is not adsorbed onto the workpiece (over-coating) floats in the air and gradually settles, adhering to the bottom plate of the powder coating chamber. However, most existing powder coating chambers are open structures, which easily lead to powder spillage during operation. Powder residue easily accumulates on the bottom plate of the chamber, not only polluting the production environment and affecting the uniformity of the coating, reducing overall coating efficiency and quality, but also causing material waste because the spilled powder cannot be recovered and reused. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a closed powder spraying chamber that has a good anti-powder overflow effect, can solve the problem of powder overflow and dispersion causing pollution to the production environment, and effectively improves spraying efficiency and spraying quality.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A closed powder coating chamber includes an inlet manual repair chamber, a powder coating chamber, and an outlet manual repair chamber arranged sequentially along the workpiece conveying direction. The inlet manual repair chamber is equipped with several sets of inlet platform directional cleaning devices, the air blowing direction of which is towards the powder coating chamber. The outlet manual repair chamber is equipped with several sets of outlet platform directional cleaning devices, the air blowing direction of which is towards the powder coating chamber. The powder spraying chamber is equipped with an annular cleaning device, and the bottom of the powder spraying chamber is provided with a material discharge chute. One end of the material discharge chute is connected to a suction pipe so that the powder in the powder spraying chamber is discharged through the material discharge chute and the suction pipe.

[0005] As a further improvement to the above technical solution: The bottom of the inlet manual repair chamber is provided with a first backflush air bag, which is connected to the directional cleaning device of the inlet platform. The bottom of the outlet manual repair chamber is provided with a second backflush air bag, which is connected to the directional cleaning device of the outlet platform. The first backflush air bag and / or the second backflush air bag are connected to the annular cleaning device.

[0006] The bottom of the powder spraying chamber is provided with a first inclined surface and a second inclined surface arranged in a mirror-symmetric manner. The annular cleaning device is located on the high side of the first inclined surface and the second inclined surface, and the material drop chute is located on the low side of the first inclined surface and the second inclined surface.

[0007] A throttling plate is rotatably connected to the material discharge chute. A throttling groove is formed on the throttling plate. A first throttling gap is formed between one side of the throttling plate and the side wall of the material discharge chute, and a second throttling gap is formed between the other side of the throttling plate and the side wall of the material discharge chute.

[0008] The left and right walls of the powder spraying chamber are provided with several sets of spray gun slots for the spray guns to pass through.

[0009] Several sets of lighting devices are installed on the top of the inlet manual repair chamber, the top of the powder spraying chamber, and the top of the outlet manual repair chamber.

[0010] Compared with the prior art, the advantages of this utility model are: This utility model's enclosed powder coating chamber includes an inlet manual application chamber, a powder coating chamber, and an outlet manual application chamber. The three chambers are interconnected. The inlet manual application chamber is equipped with multiple sets of inlet platform directional cleaning devices with airflow directed towards the powder coating chamber. Correspondingly, the outlet manual application chamber is equipped with multiple sets of outlet platform directional cleaning devices with airflow directed towards the powder coating chamber. This system can gather the powder dispersed from the inlet and outlet manual application stations into the powder coating chamber. The powder coating chamber is equipped with a ring-shaped cleaning device. The bottom of the spraying chamber is equipped with a drop trough. During the spraying process, powder that is not adsorbed onto the workpiece will settle to the bottom wall. A ring-shaped cleaning device blows the powder on the bottom wall into the drop trough. The drop trough is connected to a suction pipe, which transports the powder to a powder recovery device for recycling. This achieves closed collection of powder throughout the chamber, which not only effectively solves the problem of powder overflowing from the chamber inlet and outlet and causing pollution to the production environment, but also avoids powder waste, reduces raw material loss, reduces production costs, and has a good powder overflow prevention effect, effectively improving spraying efficiency and spraying quality. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a closed powder spraying chamber.

[0012] Figure 2 This is a schematic diagram of a half-section of a closed powder spraying chamber.

[0013] Figure 3 This is a schematic diagram of the cross-section of a closed powder spraying chamber.

[0014] Figure 4This is a partial structural diagram of the throttle plate.

[0015] Figure 5 This is a schematic diagram of the cross-sectional structure of the powder coating operation chamber.

[0016] Figure 6 This is a schematic diagram of the structure of a closed powder spraying chamber from the front view.

[0017] Figure 7 This is a top-view structural diagram of a closed powder spraying chamber.

[0018] Legend: 1. Imported manual application chamber; 101. Imported platform directional cleaning device; 102. First back-blowing air manifold; 2. Powder spraying chamber; 201. Annular cleaning device; 202. Material drop chute; 203. Suction pipe; 204. First inclined plane; 205. Second inclined plane; 206. Spray gun through-hole; 3. Outlet manual application chamber; 301. Outlet platform directional cleaning device; 302. Second back-blowing air manifold; 4. Throttling plate; 401. Throttling channel; 402. First throttling gap; 403. Second throttling gap; 5. Lighting device. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1 to 7As shown, the enclosed powder coating chamber of this embodiment includes an inlet manual repair chamber 1, a powder coating chamber 2, and an outlet manual repair chamber 3, which are sequentially connected along the workpiece conveying direction. The inlet manual repair chamber 1 is equipped with several sets of inlet platform directional cleaning devices 101, with the air blowing direction of the inlet platform directional cleaning devices 101 facing the powder coating chamber 2. The outlet manual repair chamber 3 is equipped with several sets of outlet platform directional cleaning devices 301, with the air blowing direction of the outlet platform directional cleaning devices 301 facing the powder coating chamber 2. The powder coating chamber 2 is equipped with an annular cleaning device 201. A material discharge chute 202 is provided at the bottom of the powder coating chamber 2, and one end of the material discharge chute 202 is connected to a suction pipe 203 so that the powder in the powder coating chamber 2 is discharged through the material discharge chute 202 and the suction pipe 203. The enclosed powder coating chamber is divided into sections along the workpiece conveyor line, including an inlet manual touch-up chamber 1, a powder coating chamber 2, and an outlet manual touch-up chamber 3. The three chambers are interconnected. Workpieces first enter the inlet manual touch-up chamber 1 for pre-treatment before coating, then enter the powder coating chamber 2 for spray gun application, and finally enter the outlet manual touch-up chamber 3 for post-coating touch-ups and cleaning. The inlet manual touch-up chamber 1 is equipped with multiple sets of inlet platform directional cleaning devices 101 with air blowing direction towards the powder coating chamber 2. Correspondingly, the outlet manual touch-up chamber 3 is equipped with multiple sets of outlet platform directional cleaning devices 301 with air blowing direction towards the powder coating chamber 2, which can remove the powder drift from the inlet and outlet manual touch-up stations. The powder is collected in the powder spraying chamber 2, which is equipped with an annular cleaning device 201. A material drop trough 202 is located at the bottom of the powder spraying chamber 2. During the spraying process, powder that is not adsorbed onto the workpiece settles to the bottom wall. The annular cleaning device 201 blows the powder from the bottom wall into the material drop trough 202. One end of the material drop trough 202 is connected to a suction pipe 203, which transports the powder to a powder recovery device for recycling. This achieves closed-loop powder collection throughout the chamber, effectively solving the problem of powder overflowing from the chamber inlet and outlet, causing environmental pollution. It also avoids powder waste, reduces raw material loss, and lowers production costs. The closed-loop powder collection effectively prevents powder overflow and improves spraying efficiency and quality.

[0021] It should be noted that, in this embodiment, the suction pipe 203 includes a suction device (not shown in the figure) for generating negative pressure inside the pipe. The suction device can be a centrifugal fan commonly used in the prior art, and the downstream end of the suction pipe 203 is connected to a powder recovery device for recycling the powder.

[0022] Preferably, the bottom of the inlet manual repair chamber 1 is provided with a first backflush air bag 102, which is connected to the inlet platform directional cleaning device 101. The bottom of the outlet manual repair chamber 3 is provided with a second backflush air bag 302, which is connected to the outlet platform directional cleaning device 301. The first backflush air bag 102 and / or the second backflush air bag 302 are connected to the annular cleaning device 201. In this embodiment, the first backflush air manifold 102 is used as an example. The first backflush air manifold 102 is connected to each group of inlet platform directional cleaning devices 101 through a high-pressure air pipe. The compressed air stored in the first backflush air manifold 102 provides an instantaneous high-pressure purging air source for the inlet platform directional cleaning devices 101. The second backflush air manifold 302 is similar and will not be described in detail here. The first backflush air manifold 102 and / or the second backflush air manifold 302 are connected to the annular cleaning device 201 through branch air pipes. The compressed air stored in the backflush air manifold is simultaneously supplied to the cleaning operation in the powder spraying chamber 2, which simplifies the overall air circuit structure and reduces the cost of laying external air source pipelines. In other embodiments, a third backflush air manifold can also be provided at the bottom of the powder spraying chamber 2. The third backflush air manifold is connected to the annular cleaning device 201.

[0023] Preferably, the bottom of the powder spraying chamber 2 is provided with a first inclined surface 204 and a second inclined surface 205 arranged in a mirror-symmetric manner, the annular cleaning device 201 is located on the higher side of the first inclined surface 204 and the second inclined surface 205, and the material drop chute 202 is located on the lower side of the first inclined surface 204 and the second inclined surface 205. In this embodiment, the high-level sides of the first inclined surface 204 and the second inclined surface 205 are respectively arranged on the left and right sides of the powder spraying operation chamber 2, and the low-level sides converge towards each other in the middle of the chamber. The material drop trough 202 is formed in the middle of the chamber. During the spraying operation, the settled powder will slide down along the first inclined surface 204 and the second inclined surface 205 and finally collect and fall into the low-level material drop trough 202. The annular cleaning device 201 is set on the high-level side of the first inclined surface 204 and the second inclined surface 205 and is arranged in a ring around the powder spraying operation chamber 2. The annular cleaning device 201 blows air in a direction towards the inclined surface and uses high-pressure airflow to sweep away the residual powder adhering to the inclined surface, preventing the powder from agglomerating and accumulating on the inclined surface and ensuring that the powder slides down smoothly and collects into the material drop trough 202.

[0024] Preferably, a throttling plate 4 is rotatably connected to the material discharge chute 202. The throttling plate 4 has a throttling groove 401. A first throttling gap 402 is formed between one side of the throttling plate 4 and the side wall of the material discharge chute 202, and a second throttling gap 403 is formed between the other side of the throttling plate 4 and the side wall of the material discharge chute 202. In this embodiment, the throttling plate 4 is hinged to the opening of the material discharge chute 202. A throttling groove 401 extending along the length direction is formed in the middle of the throttling plate 4. The right edge of the throttling plate 4 forms a first throttling gap 402 with the right side wall of the material discharge chute 202, and the left edge of the throttling plate 4 forms a second throttling gap 403 with the left side wall of the material discharge chute 202. When the suction pipe 203 operates under negative pressure, a negative pressure is formed inside the material discharge chute 202, and the airflow in the powder spraying chamber 2 can only pass through the throttling groove 401, the first throttling gap 402, and the second throttling gap 403. The three channels of the throttling gap 403 flow downwards. Due to the throttling effect of the contraction of the flow cross section, the airflow velocity in the three channels is greatly increased. The high-speed airflow carries the powder in the drop trough 202 into the suction pipe 203. When the first throttling gap 402 and the second throttling gap 403 are blocked by the agglomerated powder, the operator can rotate the throttling plate 4 to change the opening width of the first throttling gap 402 and the second throttling gap 403, so that the agglomerated powder falls smoothly into the drop trough 202. The operation is simple and convenient, and effectively avoids the throttling plate 4 from becoming blocked and failing.

[0025] Preferably, the left and right walls of the powder coating chamber 2 are provided with several sets of spray gun slots 206 for the spray gun to pass through. In this embodiment, the body of the external electrostatic spray gun passes through the spray gun slots 206 and extends into the powder coating chamber 2. The gun head is directly facing the workpiece conveyed in the chamber to perform electrostatic powder coating. The spray gun slots 206 can both limit the installation position of the spray gun and reserve space for the vertical movement of the spray gun.

[0026] Preferably, several sets of lighting devices 5 are provided on the top of the inlet manual repair chamber 1, the top of the powder spraying chamber 2, and the top of the outlet manual repair chamber 3, which can provide working lighting for the inlet manual repair station, the middle spraying station, and the outlet manual repair station, making it convenient for operators to visually inspect the workpiece spraying quality and carry out manual repair spraying operations.

[0027] In practical applications, compressed air is injected into the first back-blowing air manifold 102 and the second back-blowing air manifold 302. The workpiece is continuously conveyed into the closed powder coating chamber. The workpiece first enters the inlet manual touch-up chamber 1 for pre-treatment by the operator before spraying, then enters the powder coating chamber 2 for spray gun spraying, and finally enters the outlet manual touch-up chamber 3 for touch-up spraying and cleaning by the operator. In the powder coating chamber 2, electrostatic spray guns on both sides pass through the spray gun channel 206 to spray powder onto the workpiece. The settled powder slides down the first inclined surface 204 and the second inclined surface 205. With the help of the annular cleaning device 201, the inclined surfaces are swept, and the powder falls into the material drop trough 202. In the inlet manual touch-up chamber 1... The interior is equipped with multiple sets of inlet platform directional cleaning devices 101 with air blowing direction towards the powder spraying operation chamber 2, and multiple sets of outlet platform directional cleaning devices 301 with air blowing direction towards the powder spraying operation chamber 2 are installed in the outlet manual repair operation chamber 3. These devices can sweep and collect the powder scattered at the inlet and outlet manual repair stations into the powder spraying operation chamber 2. The suction pipe 203 performs negative pressure suction, and high-speed air is formed at the throttling groove 401, the first throttling gap 402 and the second throttling gap 403 of the throttling plate 4. The powder in the drop trough 202 is transported to the powder recovery device for recycling through the suction pipe 203, realizing the closed collection of powder in the entire chamber of the closed powder spraying chamber and preventing dust leakage.

[0028] The above description is merely a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. For those skilled in the art, improvements and modifications obtained without departing from the technical concept of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A closed powder spraying chamber, characterized in that, The system includes an inlet manual repair chamber (1), a powder spraying chamber (2), and an outlet manual repair chamber (3) that are sequentially connected along the workpiece conveying direction. The inlet manual repair chamber (1) is equipped with several sets of inlet platform directional cleaning devices (101), and the air blowing direction of the inlet platform directional cleaning devices (101) is towards the powder spraying chamber (2). The outlet manual repair chamber (3) is equipped with several sets of outlet platform directional cleaning devices (301), and the air blowing direction of the outlet platform directional cleaning devices (301) is towards the powder spraying chamber (2). The powder spraying operation chamber (2) is equipped with an annular cleaning device (201), and the bottom of the powder spraying operation chamber (2) is provided with a material drop chute (202). One end of the material drop chute (202) is connected to a suction pipe (203) so that the powder in the powder spraying operation chamber (2) is discharged through the material drop chute (202) and the suction pipe (203).

2. The enclosed powder spraying chamber according to claim 1, characterized in that, The bottom of the inlet manual repair chamber (1) is provided with a first backflush air bag (102), which is connected to the inlet platform directional cleaning device (101). The bottom of the outlet manual repair chamber (3) is provided with a second backflush air bag (302), which is connected to the outlet platform directional cleaning device (301). The first backflush air bag (102) and / or the second backflush air bag (302) are connected to the annular cleaning device (201).

3. The enclosed powder spraying chamber according to claim 2, characterized in that, The bottom of the powder spraying chamber (2) is provided with a first inclined surface (204) and a second inclined surface (205) arranged in a mirror-symmetric manner. The annular cleaning device (201) is located on the high side of the first inclined surface (204) and the second inclined surface (205), and the material drop chute (202) is located on the low side of the first inclined surface (204) and the second inclined surface (205).

4. The enclosed powder spraying chamber according to claim 3, characterized in that, A throttling plate (4) is rotatably connected to the material discharge chute (202). A throttling groove (401) is provided on the throttling plate (4). A first throttling gap (402) is formed between one side of the throttling plate (4) and the side wall of the material discharge chute (202). A second throttling gap (403) is formed between the other side of the throttling plate (4) and the side wall of the material discharge chute (202).

5. The enclosed powder spraying chamber according to claim 4, characterized in that, The powder spraying operation chamber (2) has several sets of spray gun through slots (206) on the left and right sides for the spray guns to pass through.

6. The enclosed powder spraying chamber according to claim 5, characterized in that, Several sets of lighting devices (5) are provided on the top of the inlet hand-applied operation chamber (1), the top of the powder spraying operation chamber (2), and the top of the outlet hand-applied operation chamber (3).

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