Electrostatic plastic spraying device

Abstract

The utility model provides an electrostatic plastic spraying device which comprises an upper conveying beam, the upper conveying beam and a lower conveying beam are arranged in parallel, and the upper conveying beam, the lower conveying beam and a supporting frame are fixedly installed in a machine cover. One ends of the upper conveying beam and the lower conveying beam are rotationally provided with feeding rollers, and the other ends are provided with curing heating plates; a curing conveying wheel is arranged between the other ends of the upper conveying beam and the lower conveying beam; plastic spraying machine boxes are arranged on the outer side of the upper conveying beam and the outer side of the lower conveying beam, two plastic spraying pipe sets are installed between the plastic spraying machine boxes, and each plastic spraying pipe of the plastic spraying pipe sets is provided with a plurality of plastic spraying nozzles. The full-process continuous operation of steel plate feeding, spraying and curing is achieved, shutdown turning is not needed, the production efficiency is improved, and manual intervention is reduced; the upper and lower parallel plastic spraying pipe groups can perform synchronous double-sided spraying, so that compared with the traditional manner of turning over after single-sided spraying, the time is greatly shortened, and the risk of coating damage is avoided; the curing conveying wheels are combined with a guide structure, deviation of the steel plate is effectively limited, and the spraying and curing process is stable.

Description

Technical Field

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

[0002] Powder coating, a widely used metal surface treatment technology, uses electrostatic powder spraying equipment to uniformly adsorb plastic powder onto the surface of a workpiece, which then cures to form a protective coating that combines decorative and corrosion-resistant properties. In the field of steel plate powder coating, traditional processes often require manual or mechanical assistance to flip the steel plate to achieve double-sided spraying, which is inefficient and labor-intensive.

[0003] While existing technologies have attempted improvements, such as the Chinese utility model patent CN220861783U which proposes an electrostatic powder coating device for steel plates, using a motor-driven clamping frame to achieve flipping, this solution has significant limitations: First, it can only process a single steel plate at a time, requiring a shutdown to change the workpiece after powder coating, thus hindering continuous production; second, frequent start-stop operations easily lead to equipment wear and tear, extending the processing cycle and making it difficult to meet the demands of industrialized mass production. Furthermore, traditional flipping structures are prone to causing scratches or uneven stress on the steel plate surface coating, affecting the coating quality.

[0004] Therefore, it is essential to invent an electrostatic powder coating device. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an electrostatic powder coating device, including an upper conveyor beam, a lower conveyor beam, a support frame, a machine cover, feed rollers, a curing heating plate, curing conveyor wheels, a powder coating machine housing, powder coating pipe assemblies, and powder coating nozzles. Two upper and two lower conveyor beams are provided, arranged parallel to each other. The upper and lower conveyor beams and the support frame are fixedly installed inside the machine cover, with the lower conveyor beam and the support frame fixedly installed together. Several feed rollers are rotatably mounted on one end of each of the two upper and two lower conveyor beams, and a curing heating plate is fixedly mounted on the other end. Several curing conveyor wheels are rotatably mounted between the other ends of the upper and lower conveyor beams. A powder coating machine housing is located on the outer side of the upper and lower conveyor beams, and two sets of powder coating pipe assemblies are fixedly installed between the two powder coating machine housings. Each powder coating pipe in each powder coating pipe assembly is equipped with several powder coating nozzles.

[0006] Preferably, the upper conveying beam, the lower conveying beam, and the support frame are located in the middle of the machine cover, and windows are opened at both ends of the machine cover, with the two corresponding windows capable of taking out and placing metal steel plates.

[0007] Preferably, three chain drive mechanisms are installed on the upper conveying beam, and each chain drive mechanism is equipped with a drive motor. The output end of the drive motor is fixed to the input end of the chain drive mechanism. The output ends of two chain drive mechanisms are connected to the corresponding curing conveying wheel, and the output end of the other chain drive mechanism is connected to a corresponding set of feeding rollers.

[0008] Preferably, the area between the feed roller and the curing conveyor wheel rotatably mounted on the upper and lower conveying beams is the powder coating area, and the powder coating pipe assembly is located in the powder coating area.

[0009] Preferably, the curing conveyor wheel is arranged adjacent to the curing heating plate, and several of the curing conveyor wheels are located between two sets of curing heating plates that are horizontally distributed in parallel.

[0010] Preferably, a plurality of the curing conveyor wheels are arranged laterally along the axis of the upper and lower conveyor beams, and the cross-section of the curing conveyor wheels is "I" shaped, allowing the metal steel plate to pass over the powder coating area from the feed roller and smoothly transition onto the curing conveyor wheels.

[0011] Preferably, the powder coating area is provided with two sets of powder coating pipe groups arranged in parallel, one above the other. The powder coating pipe groups are located between the feed roller and the curing heating plate. The powder coating pipe group is a powder coating assembly composed of several powder coating pipes. Each powder coating pipe is connected to the output end of the powder coating machine box. The powder coating pipe group can perform double-sided powder coating on the metal steel plate passing through the powder coating area.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model uses upper and lower conveyor beams in conjunction with feeding rollers and curing conveyor wheels to achieve continuous operation of the entire process from steel plate feeding, spraying to curing, without the need to stop the machine to flip the plate or change the workpiece, which significantly improves production efficiency and reduces the frequency of manual intervention.

[0014] This utility model, with its parallel spray coating tube assembly, can simultaneously spray both sides of a steel plate. Compared to the traditional method of spraying one side at a time and then flipping it over, it significantly shortens the processing time and avoids the risk of coating damage caused by flipping.

[0015] The "I"-shaped curing conveyor wheel design of this utility model can effectively limit the lateral displacement of the steel plate. Combined with the conveyor roller and guide structure, it ensures that the steel plate remains stable during the spraying and curing process, reducing the problem of uneven coating thickness caused by shaking. Attached Figure Description

[0016] Figure 1 This is a partial cross-sectional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the machine cover of this utility model before it is installed.

[0018] Figure 3 This is a utility model Figure 2 A top-view structural diagram.

[0019] In the picture:

[0020] 1. Upper conveyor beam; 2. Lower conveyor beam; 3. Support frame; 4. Machine cover; 5. Feed roller; 6. Curing heating plate; 7. Curing conveyor wheel; 8. Powder coating machine box; 9. Powder coating pipe assembly; 10. Powder coating nozzle; 11. Window; 12. Chain drive mechanism; 13. Drive motor. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0022] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0023] As attached Figure 1 To be continued Figure 3 As shown:

[0024] This utility model provides an electrostatic powder coating device, comprising an upper conveying beam 1, a lower conveying beam 2, a support frame 3, a machine cover 4, feeding rollers 5, a curing heating plate 6, curing conveying wheels 7, a powder coating machine housing 8, powder coating pipe assemblies 9, and powder coating nozzles 10. Two upper conveying beams 1 and two lower conveying beams 2 are provided, arranged parallel to each other. The upper conveying beams 1, lower conveying beams 2, and support frame 3 are fixedly installed inside the machine cover 4, wherein the lower conveying beams 2 and support frame 3 are fixedly installed together. Several feeding rollers 5 are rotatably mounted on one end of each of the two upper conveying beams 1 and two lower conveying beams 2, and a curing heating plate 6 is fixedly mounted on the other end. Several curing conveying wheels 7 are rotatably mounted between the other ends of the upper conveying beams 1 and lower conveying beams 2. A powder coating machine housing 8 is located on the outer side of the upper conveying beams 1 and lower conveying beams 2, and two sets of powder coating pipe assemblies 9 are fixedly installed between the two powder coating machine housings 8. Each powder coating pipe of each powder coating pipe assembly 9 is provided with several powder coating nozzles 10.

[0025] Furthermore, the machine cover 4 is made of high-strength metal materials, such as stainless steel, providing excellent protection and a certain degree of sealing to effectively prevent dust from escaping during the powder coating process. The upper conveyor beam 1, lower conveyor beam 2, and support frame 3 are precisely installed in the middle of the machine cover 4. The upper conveyor beam 1 and lower conveyor beam 2 are made of high-quality alloy steel, possessing sufficient strength and rigidity to withstand the weight of the metal steel plates during transport. The support frame 3 is also made of sturdy metal and is firmly fixed to the bottom of the machine cover 4 by welding or bolting, providing stable support for the upper conveyor beam 1 and lower conveyor beam 2.

[0026] Furthermore, windows 11 are provided at both ends of the machine cover 4. The size of the windows 11 is designed according to the maximum size of the metal steel plate to ensure that the metal steel plate can pass through smoothly. The edges of the windows 11 are smoothed to avoid scratching the metal steel plate. In actual operation, operators can easily pick up and put down the metal steel plate through these two corresponding windows 11, realizing the rapid replacement and conveying of materials.

[0027] Furthermore, three chain drive mechanisms 12 are precisely installed on the upper conveyor beam 1. Each chain drive mechanism 12 mainly consists of a chain, sprockets, and a tensioning device. The chain is made of high-strength alloy steel, possessing excellent wear resistance and fatigue resistance. Each chain drive mechanism 12 is equipped with a drive motor 13. The drive motor 13 is a high-efficiency, energy-saving three-phase asynchronous motor, possessing stable output power and reliable operating performance. The drive motor 13 can drive the three chain drive mechanisms 12 to operate synchronously.

[0028] Furthermore, the output end of the drive motor 13 is fixed to the input end of the chain drive mechanism 12 via a coupling to ensure efficient power transmission. The output ends of two chain drive mechanisms 12 are connected to the corresponding curing conveyor rollers 7 via key connections, enabling accurate power transmission to each curing conveyor roller 7 and driving its rotation. Similarly, the output ends of the other chain drive mechanism 12 are connected to a corresponding set of feed rollers 5 via key connections, driving the feed rollers 5 to rotate and realize the conveying of the metal steel plate.

[0029] Furthermore, the upper conveyor beam 1 and the lower conveyor beam 2 are rotatably mounted on the feed roller 5 and the curing conveyor wheel 7 via bearings. Both the feed roller 5 and the curing conveyor wheel 7 are made of high-quality carbon steel and have undergone surface quenching treatment to improve their hardness and wear resistance. The area formed between the feed roller 5 and the curing conveyor wheel 7 is the powder coating area.

[0030] Furthermore, the powder coating pipe assembly 9 is precisely positioned within the powder coating area. The powder coating pipe assembly 9 is fixed to the upper conveyor beam 1 and the lower conveyor beam 2 via brackets to ensure its positional stability. The powder coating pipe assembly 9 is capable of precisely powder coating the metal steel plates within this area.

[0031] Furthermore, the curing conveyor rollers 7 are arranged adjacent to the curing heating plates 6. The curing heating plates 6 are made of ceramic heating material, which features fast heating speed and uniform temperature. Several curing conveyor rollers 7 are located between two sets of curing heating plates 6 that are horizontally distributed in parallel. The curing heating plates 6 are fixed to the inside of the machine cover 4 by bolts, maintaining a suitable distance from the curing conveyor rollers 7 to ensure that the passing metal steel plates can be uniformly heated and cured.

[0032] Furthermore, several curing conveyor rollers 7 are arranged laterally along the axes of the upper conveyor beam 1 and the lower conveyor beam 2. The cross-section of the curing conveyor rollers 7 is designed in an "I" shape, which better guides the conveying of the metal steel sheet and prevents it from shifting during the conveying process. The curing conveyor rollers 7 are rotatably connected to the upper conveyor beam 1 and the lower conveyor beam 2 through bearings, ensuring their rotational flexibility. Driven by the feed rollers 5, the metal steel sheet can smoothly pass through the powder coating area and smoothly transition onto the curing conveyor rollers 7 for further curing treatment.

[0033] Furthermore, the powder coating area is equipped with two parallel sets of powder coating pipe assemblies 9, located between the feed roller 5 and the curing heating plate 6. Each powder coating pipe assembly 9 is a powder coating component composed of several powder coating pipes made of corrosion-resistant plastic with a smooth interior to ensure smooth paint flow. Each powder coating pipe is connected to the output end of the powder coating machine housing 8 via a pipe. The powder coating machine housing 8 contains a pressure pump and a paint storage tank, providing a stable paint supply and appropriate spraying pressure for the powder coating pipes. The powder coating pipe assembly 9 can perform double-sided powder coating on the metal steel plates passing through the powder coating area, ensuring that the surface of the metal steel plates is uniformly covered with paint.

[0034] The working principle is as follows: First, the metal steel plate is fed into the machine cover 4 through window 11. At this time, the drive motor 13 starts, driving one of the sprockets in the chain drive mechanism 12 to rotate through the coupling. This sprocket drives the other sprockets to run together through the chain, thereby simultaneously driving a set of feed rollers 5 installed on the upper conveyor beam 1 to rotate. The feed rollers 5 on the upper conveyor beam 1, in conjunction with the feed rollers 5 on the lower conveyor beam 2, receive and move the steel plate towards the powder coating area. The knurled design on the surface of the feed rollers 5 provides friction, ensuring uniform conveying of the steel plate.

[0035] Upon entering the powder coating area, the upper and lower powder coating pipe groups 9 start synchronously. The electrostatic generator inside the powder coating machine housing 8 charges the plastic powder, which is then transported to the powder coating nozzle 10 through the powder coating pipe. The nozzle 10 sprays the powder evenly onto both sides of the steel plate at an adjustable angle, utilizing the principle of electrostatic adsorption to ensure the powder adheres tightly.

[0036] The coated steel plate continues to move forward, driven by two other sets of chain drive mechanisms 12 to support the curing conveyor wheel 7. The "I"-shaped groove of the curing conveyor wheel 7 engages the edge of the steel plate to prevent lateral displacement, while simultaneously pulling the steel plate into the curing channel.

[0037] Inside the curing channel, the parallel quartz curing heating plates 6 are simultaneously heated to the set temperature (e.g., 180-220℃) to bake the powder on the steel plate surface. During the curing process, the curing conveyor wheel 7 rotates continuously to ensure that the steel plate passes through the heating area at a uniform speed, avoiding local overheating or uneven curing.

[0038] Finally, the cured steel plate is conveyed out of the machine cover 4 by the curing conveyor wheel 7 and leaves the equipment through another window 11, completing the entire powder coating process. During this process, the powder recovery device built into the powder coating machine housing 8 works continuously to collect and recycle unattached powder, and the machine cover 4 is kept relatively sealed inside by the sealing strip to reduce dust leakage.

[0039] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. An electrostatic powder coating device, characterized in that, The system includes an upper conveyor beam (1), a lower conveyor beam (2), a support frame (3), a machine cover (4), a feed roller (5), a curing heating plate (6), a curing conveyor wheel (7), a powder coating machine housing (8), a powder coating pipe assembly (9), and a powder coating nozzle (10). Two upper conveyor beams (1) and two lower conveyor beams (2) are provided, arranged parallel to each other. The upper conveyor beams (1), lower conveyor beams (2), and support frame (3) are fixedly installed inside the machine cover (4), wherein the lower conveyor beams (2) and support frame (3) are fixedly installed together. The two upper conveyor beams (1) 1) Several feeding rollers (5) are rotatably installed at one end of the two lower conveying beams (2), and a curing heating plate (6) is fixedly installed at the other end; several curing conveying wheels (7) are rotatably installed between the other ends of the upper conveying beam (1) and the lower conveying beam (2); a powder coating machine box (8) is provided on the outer side of the middle of the upper conveying beam (1) and the lower conveying beam (2), and two sets of powder coating pipe groups (9) are fixedly installed between the two powder coating machine boxes (8), and several powder coating nozzles (10) are provided on each powder coating pipe of the powder coating pipe group (9).

2. The electrostatic powder coating device as described in claim 1, characterized in that: The upper conveying beam (1), the lower conveying beam (2) and the support frame (3) are located in the middle of the machine cover (4). The machine cover (4) has windows (11) at both ends, and the two corresponding windows (11) can be used to pick up and put in metal steel plates.

3. The electrostatic powder coating device as described in claim 2, characterized in that: Three chain drive mechanisms (12) are installed on the upper conveying beam (1). Each chain drive mechanism (12) is equipped with a drive motor (13). The output end of the drive motor is fixed to the input end of the chain drive mechanism (12). The output ends of two chain drive mechanisms (12) are connected to the corresponding curing conveying wheel (7), and the output end of the other chain drive mechanism (12) is connected to the corresponding set of feeding rollers (5).

4. The electrostatic powder coating device as described in claim 3, characterized in that: The area between the feed roller (5) and the curing conveyor wheel (7) rotatably mounted on the upper conveyor beam (1) and the lower conveyor beam (2) is the powder coating area, and the powder coating tube assembly (9) is set in the powder coating area.

5. The electrostatic powder coating device as described in claim 4, characterized in that: The curing conveyor wheel (7) is arranged adjacent to the curing heating plate (6), and several of the curing conveyor wheels (7) are located between two sets of curing heating plates (6) that are horizontally distributed in parallel.

6. The electrostatic powder coating device as described in claim 5, characterized in that: Several curing conveyor wheels (7) are arranged laterally along the axis of the upper conveyor beam (1) and the lower conveyor beam (2). The cross-section of the curing conveyor wheel (7) is "I". The metal steel plate is allowed to pass through the powder coating area from the feed roller (5) and smoothly transition to the curing conveyor wheel (7).

7. The electrostatic powder coating device as described in claim 6, characterized in that: The powder coating area is provided with two sets of parallel powder coating tube groups (9) arranged at the top and bottom. The powder coating tube groups (9) are located between the feed roller (5) and the curing heating plate (6). The powder coating tube group (9) is a powder coating assembly composed of several powder coating tubes. Each powder coating tube is connected to the output end of the powder coating machine box (8). The powder coating tube group (9) can perform double-sided powder coating on the metal steel plate passing through the powder coating area.

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