Spraying device having rapid drying function, and method

Abstract

A spraying device having a rapid drying function, and a method. The spraying device comprises a base, a spraying box, spraying mechanisms, a drying box, an electric sliding table, and a heating wire, wherein the spraying box and the drying box are securely connected to the base; a guide rail is provided on the base; the electric sliding table is slidably connected to the guide rail; the spraying box is in communication with the drying box; the heating wire is mounted on an inner wall of the drying box; the spraying mechanisms are securely connected to the base, and are disposed on two sides of the spraying box; the spraying box and the drying box are sequentially arranged in a conveying direction of a workpiece; the workpiece to be processed is placed on the electric sliding table, and the electric sliding table then moves along the guide rail, thereby driving the workpiece to sequentially pass through the spraying box and the drying box; when the workpiece passes through the spraying box, the spraying mechanisms located on the two sides of the spraying box operate to spray a coating onto the surface of the workpiece; and after the spraying is completed, the workpiece is driven by the electric sliding table to enter the drying box, and the heating wire operates to perform a rapid drying treatment on the sprayed workpiece.

Description

A spraying device and method with rapid drying function Technical Field

[0001] This invention relates to the field of spraying technology, specifically to a spraying device and method with a rapid drying function. Background Technology

[0002] A spraying apparatus is a device used to uniformly spray paint or coatings onto a target surface. It typically includes a spray gun, nozzles, and a corresponding control system to ensure precision and consistency. The design of a spraying apparatus needs to consider factors such as the properties of the paint, the characteristics of the target surface, and production efficiency. Common types of spraying apparatus include spray guns, spraying machines, and spraying robots.

[0003] When spraying metal workpieces, some large workpieces often require multiple spray heads to work together to improve spraying efficiency. However, when multiple spray heads work together, the sprayed areas will partially overlap, and the amount of paint applied in the overlapping areas will be greater than that in the normally sprayed areas. This can easily lead to inconsistent paint thickness on the workpiece, thus affecting the spraying quality.

[0004] Summary of the Invention

[0005] The purpose of this invention is to provide a spraying apparatus and method with a rapid drying function to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: The spraying device includes a base, a spraying box, a spraying mechanism, a drying box, an electric slide table, and a heating wire. The spraying box and the drying box are fixedly connected to the base. The base is provided with a guide rail. The electric slide table is slidably connected to the guide rail. The spraying box and the drying box are connected. The heating wire is installed on the inner wall of the drying box. The spraying mechanism is fixedly connected to the base. The spraying mechanism is arranged on both sides of the spraying box. The spraying box and the drying box are arranged sequentially along the conveying direction of the workpiece.

[0007] This invention employs electrostatic spraying. The base, mounted on the ground, provides stable support for the entire device. When spraying is required, the workpiece to be processed is placed on an electric slide table equipped with clamps to fix the workpiece. The electric slide table then moves along a guide rail, causing the workpiece to pass sequentially through a spray box and a drying box. As the workpiece passes through the spray box, the spraying mechanisms located on both sides of the spray box activate, spraying the coating onto the surface of the workpiece. After spraying, the workpiece, driven by the electric slide table, enters the drying box, where heating wires activate to rapidly dry the sprayed workpiece. This integrated spraying and drying process improves processing efficiency.

[0008] Furthermore, the spraying mechanism includes a column, a linear module, a spraying assembly, an adjustment assembly, and an electrostatic generator. The column is fixedly connected to the base, the linear module is slidably connected to the column, the spraying assembly is fixedly connected to the linear module, the adjustment assembly is fixedly connected to the spraying assembly, the spraying assembly is externally connected to compressed air and paint source, the electrostatic generator is fixedly connected to the base, and the electrostatic generator is electrically connected to the spraying assembly.

[0009] The column is fixed on the base to provide stable support for the spraying mechanism. During the spraying operation, the spraying assembly uses compressed air as a power source to spray paint onto the surface of the workpiece. An electrostatic generator causes the paint sprayed from the spraying assembly to become electrostatically charged, which facilitates the paint adhering to the surface of the workpiece. The linear module is used to drive the spraying assembly to move up and down along the column, thereby spraying the paint evenly onto the surface of the workpiece. In order to prevent interference between multiple nozzles during spraying and affect the spraying quality, the adjustment assembly is used to reduce interference between multiple nozzles and improve the spraying effect.

[0010] Furthermore, the spraying assembly includes a bracket, an electrostatic spray gun, an air inlet pipe, and a feed pipe. The bracket is securely connected to the linear module, the electrostatic spray gun is securely connected to the bracket, the electrostatic spray gun is electrically connected to the electrostatic generator, and several electrostatic spray guns are provided on the bracket. The air inlet pipe is connected to the air inlet of the electrostatic spray gun and is connected to compressed air. The feed pipe is connected to the feed inlet of the electrostatic spray gun and is connected to a paint source.

[0011] The bracket is fixed on the linear module to provide stable support for the spraying assembly. During the spraying operation, compressed air introduced through the air inlet pipe serves as the power source to spray the paint that enters the electrostatic spray gun from the feed pipe. The electrostatic spray gun generates high-voltage static electricity through the electrostatic generator, causing the head of the electrostatic spray gun to become negatively charged, while the workpiece is grounded and positively charged. When the paint is sprayed out from the head of the electrostatic spray gun, it captures the charge and becomes negatively charged. Under the action of airflow and electric field, it flies toward the workpiece and adheres to its surface. During the spraying process, the paint is subjected to the combined effects of gravity, air thrust, and electrostatic attraction. Under the action of air thrust and electrostatic attraction, it overcomes its own gravity and adheres to the surface of the workpiece.

[0012] Furthermore, the adjustment assembly is located between the two electrostatic spray guns. The adjustment assembly includes a connecting frame, side support, elastic block, movable element, and electrode plate. One end of the connecting frame is fixedly connected to the bracket, and the other end of the connecting frame is fixedly connected to the elastic block. The side support is fixedly connected to the connecting frame and is located on both sides of the connecting frame. One end of the movable element is hinged to the side support, and the other end of the movable element is hinged to the elastic block. The elastic block is made of rubber and is arc-shaped. The electrode plate is fixedly connected to the elastic block, and the electrode plate faces the workpiece. The electrode plate is electrically connected to the negative electrode of the electrostatic generator.

[0013] However, during spraying operations, when multiple electrostatic spray guns operate simultaneously, the paint sprayed from the electrostatic spray guns diffuses towards the workpiece in a cone shape. The paint diffused between two adjacent electrostatic spray guns will partially overlap, forming an overlapping zone. Under the thrust of the airflow, the paint coverage in the overlapping zone will be greater than in the normally sprayed area. The distribution of paint in the overlapping zone is adjusted by regulating the components to ensure a consistent paint thickness on the workpiece surface. The outer contour of the overlapping zone is arc-shaped. To conform to this overlapping zone, an arc-shaped elastic block is placed on the side closest to the workpiece, and an electrode sheet is covered on the surface of the elastic block. The electrode plate is connected to the negative terminal of the electrostatic generator, making the electrode plate negatively charged and the workpiece positively charged. An electric field is formed between them. The paint is negatively charged, and the paint entering the overlapping area overcomes the thrust of the airflow under the action of the electric field, thereby changing its direction of movement. This makes the paint distribution in the overlapping area more uniform, thus ensuring the spraying quality. However, the spraying pressure required varies for different workpieces. When the spraying pressure increases, the diffusion range of the paint will increase, and the curvature of the contour curve of the overlapping area will decrease. The curvature of the elastic block is automatically adjusted by the moving element to match the curvature of the overlapping area, thereby ensuring the adjustment effect.

[0014] Furthermore, the moving element includes a fixed sleeve, a piston rod, a return spring, and a connecting tube. The fixed sleeve is hinged to the side support, one end of the piston rod is hinged to the elastic block, and the other end of the piston rod is slidably connected to the inner cavity of the fixed sleeve. The fixed sleeve is divided into an air intake chamber and an adjustment chamber by the piston rod. The air intake chamber is located on the side closer to the elastic block, and the adjustment chamber is located on the side closer to the side support. One end of the connecting tube is connected to the air intake chamber, and the other end of the connecting tube is connected to the air intake pipe. The return spring is installed in the adjustment chamber.

[0015] The increased spraying pressure is achieved by increasing the intake pressure, thus increasing the pressure inside the intake pipe. With the intake chamber and intake pipe connected by a connecting pipe, the pressure inside the intake chamber also increases. Under this pressure, the piston rod is pushed towards the lateral support side, compressing the return spring. This causes the elastic block hinged to the piston rod to expand laterally, reducing the curvature of the elastic block. When the spraying pressure decreases, the pressure inside the intake chamber is less than the spring force of the return spring. Under this spring force, the piston rod moves towards the elastic block, increasing its curvature. This achieves automatic adjustment of the elastic block's curvature according to the spraying pressure, matching it to the contour curve curvature of the overlapping area, ensuring effective adjustment and improving spraying quality.

[0016] Furthermore, a laser rangefinder is installed on the connecting frame, with the detection end of the laser rangefinder facing the workpiece. The laser rangefinder is connected to an external detection power supply, and the detection power supply and the laser rangefinder constitute a detection circuit. The detection circuit is used to control the voltage transmitted to the electrode plate by the electrostatic generator.

[0017] To ensure that the voltage on the electrode plate meets the requirements, the distance between the adjustment component and the workpiece is first measured using a laser rangefinder. Then, the voltage transmitted to the electrode plate by the electrostatic generator is controlled by the corresponding control system to maintain the voltage on the electrode plate within a suitable range, so as to ensure the strength of the electric field.

[0018] Furthermore, several electrode plates are mounted on the surface of the elastic block, and the voltage of the several electrode plates gradually increases from both sides of the elastic block toward the center.

[0019] Because the elastic block is arc-shaped, the distance between the electrode plates at both ends of the elastic block and the workpiece is relatively close. Since the electric field strength is related to the distance, the closer the distance, the higher the electric field strength. By gradually increasing the voltage of the electrode plates on the elastic block from both sides to the center, the electric field strength between the several electrode plates on the elastic block and the workpiece is kept consistent, thereby ensuring the adjustment effect.

[0020] The method includes the following steps:

[0021] 1) First, place the workpiece to be sprayed on the electric slide and clamp it;

[0022] 2) The electric slide moves along the guide rail, thereby driving the workpiece through the spray box. The spraying mechanism is started to spray the workpiece.

[0023] 3) During the spraying process, the overlapping area of ​​the spraying is adjusted by adjusting the components;

[0024] 4) After the spraying is completed, the workpiece enters the drying oven under the drive of the electric slide table, and the sprayed workpiece is dried by heating wire.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are: after the spraying is completed, the workpiece enters the drying chamber under the drive of the electric slide table, the heating wire works, and the sprayed workpiece is quickly dried, realizing the integration of spraying and drying, which is conducive to improving processing efficiency.

[0026] The distribution of coating in the overlapping area is adjusted by regulating the components to ensure a consistent coating thickness on the workpiece surface. The outer contour of the overlapping area of ​​the diffused coating is arc-shaped. To fit this overlapping area, an arc-shaped elastic block is placed on the side closest to the workpiece. An electrode sheet is then placed on the surface of the elastic block and connected to the negative terminal of the electrostatic generator. This makes the electrode sheet negatively charged and the workpiece positively charged, creating an electric field between them. The coating becomes negatively charged, causing the coating entering the overlapping area to overcome the thrust of the airflow under the action of the electric field, thereby changing its direction of movement. This makes the coating distribution in the overlapping area more uniform, thus ensuring the coating quality.

[0027] The air intake chamber and air intake pipe are connected by a connecting pipe. When the spraying pressure increases, the pressure in the air intake chamber also increases. Under the action of pressure, the piston rod is pushed to move towards the side support, and the return spring is compressed. This causes the elastic block hinged to the piston rod to expand to both sides, thereby reducing the curvature of the elastic block. When the spraying pressure decreases, the pressure in the air intake chamber is less than the elastic force of the return spring. Under the action of the elastic force, the piston rod moves towards the side of the elastic block, increasing the curvature of the elastic block. This achieves automatic adjustment of the curvature of the elastic block according to the spraying pressure, so that it matches the curvature of the contour curve of the overlapping area, ensuring the adjustment effect and improving the spraying quality. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 is a magnified view of a portion of Figure 1 along direction A;

[0031] Figure 3 is a partial cross-sectional view of the present invention;

[0032] Figure 4 is a schematic diagram of the spraying mechanism;

[0033] Figure 5 is a magnified view of a portion of Figure 4 along direction B;

[0034] Figure 6 is a schematic diagram of the adjustment component;

[0035] Figure 7 is a partial enlarged view of Figure 6 along direction C;

[0036] Figure 8 is a schematic diagram of the overlapping area during spraying;

[0037] Figure 9 is a schematic diagram of the stress on the coating in the overlapping area;

[0038] In the diagram: 1-Base, 11-Guide rail, 2-Spraying box, 3-Spraying mechanism, 31-Column, 32-Linear module, 33-Spraying assembly, 331-Bracket, 332-Electrostatic spray gun, 333-Air inlet pipe, 334-Feed pipe, 34-Adjusting assembly, 341-Connecting frame, 342-Side support, 343-Elastic block, 344-Moving element, 3441-Fixing sleeve, 34411-Air inlet chamber, 34412-Adjusting chamber, 3442-Piston rod, 3443-Reset spring, 3444-Connecting pipe, 345-Electrode plate, 346-Laser rangefinder, 35-Electrostatic generator, 4-Drying oven, 5-Electric slide, 6-Heating wire. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0040] The present invention provides the following technical solution:

[0041] As shown in Figures 1 and 3, the spraying device includes a base 1, a spraying box 2, a spraying mechanism 3, a drying box 4, an electric slide table 5, and a heating wire 6. The spraying box 2 and the drying box 4 are fixedly connected to the base 1. The base 1 is provided with a guide rail 11. The electric slide table 5 is slidably connected to the guide rail 11. The spraying box 2 and the drying box 4 are connected. The heating wire 6 is installed on the inner wall of the drying box 4. The spraying mechanism 3 is fixedly connected to the base 1. The spraying mechanism 3 is arranged on both sides of the spraying box 2. The spraying box 2 and the drying box 4 are arranged sequentially along the conveying direction of the workpiece.

[0042] This invention employs electrostatic spraying. The base 1, installed on the ground, provides stable support for the entire device. When spraying is required, the workpiece to be processed is placed on the electric slide table 5, which is equipped with clamps to fix the workpiece. The electric slide table 5 then moves along the guide rail 11, thereby driving the workpiece through the spray box 2 and the drying box 4 in sequence. When the workpiece passes through the spray box 2, the spraying mechanism 3 located on both sides of the spray box 2 operates, spraying the paint onto the surface of the workpiece. After spraying, the workpiece enters the drying box 4 under the drive of the electric slide table 5, where the heating wire 6 operates to quickly dry the sprayed workpiece, achieving integrated spraying and drying, which is beneficial to improving processing efficiency.

[0043] As shown in Figure 2, the spraying mechanism 3 includes a column 31, a linear module 32, a spraying component 33, an adjusting component 34, and an electrostatic generator 35. The column 31 is fixedly connected to the base 1, the linear module 32 is slidably connected to the column 31, the spraying component 33 is fixedly connected to the linear module 32, the adjusting component 34 is fixedly connected to the spraying component 33, the spraying component 33 is externally connected to compressed air and paint source, the electrostatic generator 35 is fixedly connected to the base 1, and the electrostatic generator 35 is electrically connected to the spraying component 33.

[0044] The column 31 is fixed on the base 1 to provide stable support for the spraying mechanism 3. During the spraying operation, the spraying component 33 uses compressed air as a power source to spray the paint onto the surface of the workpiece. The electrostatic generator 35 makes the paint sprayed from the spraying component 33 carry static electricity, which makes it easier for the paint to adhere to the surface of the workpiece. The linear module 32 is used to drive the spraying component 33 to move up and down along the column 31, so as to spray the paint evenly onto the surface of the workpiece. In order to prevent the multiple nozzles from interfering with each other during spraying and affecting the spraying quality, the adjustment component 34 is used to reduce the interference between the multiple nozzles and improve the spraying effect.

[0045] As shown in Figures 4 and 5, the spraying assembly 33 includes a bracket 331, an electrostatic spray gun 332, an air inlet pipe 333, and a feed pipe 334. The bracket 331 is fastened to the linear module 32. The electrostatic spray gun 332 is fastened to the bracket 331 and electrically connected to the electrostatic generator 35. Several electrostatic spray guns 332 are provided on the bracket 331. The air inlet pipe 333 is connected to the air inlet of the electrostatic spray gun 332 and is connected to compressed air. The feed pipe 334 is connected to the feed inlet of the electrostatic spray gun 332 and is connected to a paint source.

[0046] The bracket 331 is fixed on the linear module 32 to provide stable support for the spraying assembly 33. During the spraying operation, the compressed air introduced through the air inlet pipe 333 serves as the power source to spray the paint that enters the electrostatic spray gun 332 from the feed pipe 334. The electrostatic spray gun 332 generates high voltage static electricity through the electrostatic generator 35, so that the head of the electrostatic spray gun 332 becomes negatively charged, while the workpiece is grounded and becomes positively charged. When the paint is sprayed out from the head of the electrostatic spray gun 332, it will capture the charge and become negatively charged. Under the action of airflow and electric field, it flies towards the workpiece and adheres to its surface. During the spraying process, the paint is subjected to the action of gravity, air thrust and electrostatic field attraction, and under the action of air thrust and electrostatic field attraction, it overcomes its own gravity and adheres to the surface of the workpiece.

[0047] As shown in Figure 6-9, the adjustment assembly 34 is located between the two electrostatic spray guns 332. The adjustment assembly 34 includes a connecting frame 341, a side support 342, an elastic block 343, a movable element 344, and an electrode plate 345. One end of the connecting frame 341 is fastened to the support 331, and the other end of the connecting frame 341 is fastened to the elastic block 343. The side support 342 is fastened to the connecting frame 341 and is located on both sides of the connecting frame 341. One end of the movable element 344 is hinged to the side support 342, and the other end of the movable element 344 is hinged to the elastic block 343. The elastic block 343 is made of rubber and is arc-shaped. The electrode plate 345 is fastened to the elastic block 343 and faces the workpiece. The electrode plate 345 is electrically connected to the negative electrode of the electrostatic generator 35.

[0048] However, during the spraying operation, when multiple electrostatic spray guns 332 operate simultaneously, the paint sprayed from the electrostatic spray guns 332 diffuses towards the workpiece in a conical shape. The paint diffused between two adjacent electrostatic spray guns 332 will partially overlap, forming an overlapping area. Under the thrust of the airflow, the paint coverage in the overlapping area will be greater than that in the normally sprayed area. The distribution of paint in the overlapping area is adjusted by the adjusting component 34 to ensure a consistent spray thickness on the workpiece surface. The outer contour of the overlapping area of ​​the diffused paint is arc-shaped. To conform to this overlapping area, an arc-shaped elastic block 343 is set on the side closest to the workpiece, and an electrode sheet 34 is covered on the surface of the elastic block 343. 5. The electrode 345 is connected to the negative terminal of the electrostatic generator 35, so that the electrode 345 is negatively charged and the workpiece is positively charged, forming an electric field between them. The paint is negatively charged, so that the paint entering the overlapping area overcomes the thrust of the airflow under the action of the electric field, thereby changing its direction of movement and making the paint distribution in the overlapping area more uniform, thus ensuring the spraying quality. However, the spraying pressure required is different for different workpieces. When the spraying pressure increases, the diffusion range of the paint will increase and the curvature of the contour curve of the overlapping area will decrease. The curvature of the elastic block 343 is automatically adjusted by the movable element 344 to match the curvature of the overlapping area, thereby ensuring the adjustment effect.

[0049] As shown in Figure 6-9, the movable element 344 includes a fixed sleeve 3441, a piston rod 3442, a return spring 3443, and a connecting pipe 3444. The fixed sleeve 3441 is hinged to the side support 342. One end of the piston rod 3442 is hinged to the elastic block 343, and the other end of the piston rod 3442 is slidably connected to the inner cavity of the fixed sleeve 3441. The fixed sleeve 3441 is divided into an air intake chamber 34411 and an adjustment chamber 34412 by the piston rod 3442. The air intake chamber 34411 is located on the side closer to the elastic block 343, and the adjustment chamber 34412 is located on the side closer to the side support 342. One end of the connecting pipe 3444 is connected to the air intake chamber 34411, and the other end of the connecting pipe 3444 is connected to the air intake pipe 333. The return spring 3443 is installed in the adjustment chamber 34412.

[0050] The increased spraying pressure is achieved by increasing the intake pressure, thus increasing the pressure within the intake pipe 333. With the connecting pipe 3444 connecting the intake chamber 34411 and the intake pipe 333, the pressure within the intake chamber 34411 also increases. Under this pressure, the piston rod 3442 is pushed towards the side support 342, compressing the return spring 3443. This causes the elastic block 343, hinged to the piston rod 3442, to expand laterally, reducing its curvature. When the spraying pressure decreases, the pressure within the intake chamber 34411 is less than the spring force of the return spring 3443. Under this spring force, the piston rod 3442 moves towards the elastic block 343, increasing its curvature. This achieves automatic adjustment of the elastic block 343's curvature according to the spraying pressure, ensuring it matches the curvature of the overlapping area's contour curve, guaranteeing the adjustment effect, and improving the spraying quality.

[0051] As shown in Figure 5, a laser rangefinder 346 is provided on the connecting frame 341. The detection end of the laser rangefinder 346 faces the workpiece. The laser rangefinder 346 is connected to an external detection power supply. The detection power supply and the laser rangefinder 346 constitute a detection circuit. The detection circuit is used to control the voltage transmitted from the electrostatic generator 35 to the electrode plate 345.

[0052] To ensure that the voltage on the electrode 345 meets the requirements, the distance between the adjustment component 34 and the workpiece is first measured by the laser rangefinder 346. Then, the voltage transmitted to the electrode 345 by the electrostatic generator 35 is controlled by the corresponding control system so that the voltage on the electrode 345 is maintained in a suitable range to ensure the strength of the electric field.

[0053] As shown in Figure 5, several electrode plates 345 are mounted on the surface of the elastic block 343, and the voltage of the several electrode plates 345 gradually increases from both sides of the elastic block 343 toward the center.

[0054] Because the elastic block 343 is arc-shaped, the distance between the electrode plates 345 at both ends of the elastic block 343 and the workpiece is relatively close. Since the electric field strength is related to the distance, the closer the distance, the higher the electric field strength. By gradually increasing the voltage of the electrode plates 345 on the elastic block 343 from both sides to the center, the electric field strength between the several electrode plates 345 on the elastic block 343 and the workpiece is kept consistent, thereby ensuring the adjustment effect.

[0055] The method includes the following steps:

[0056] 1) First, place the workpiece to be sprayed on the electric slide table 5 and clamp it;

[0057] 2) The electric slide moves along the guide rail 11, thereby driving the workpiece through the spray box 2. The spraying mechanism 3 is started to spray the workpiece.

[0058] 3) During the spraying process, the overlapping area of ​​the spraying is adjusted by adjusting component 34;

[0059] 4) After the spraying is completed, the workpiece enters the drying oven 4 under the drive of the electric slide table 5, and the sprayed workpiece is dried by the heating wire 6.

[0060] The working principle of this invention is as follows: First, the workpiece to be processed is placed on the electric slide table 5, which is equipped with a clamp to fix the workpiece. Then, the electric slide table 5 moves along the guide rail 11, thereby driving the workpiece to pass through the spray box 2 and the drying box 4 in sequence. When the workpiece passes through the spray box 2, the spraying mechanism 3 located on both sides of the spray box 2 works. Compressed air introduced through the air inlet pipe 333 serves as the power source to spray the paint from the feed pipe 334 into the electrostatic spray gun 332. The electrostatic spray gun 332 generates high voltage static electricity through the electrostatic generator 35, so that the head of the electrostatic spray gun 332 becomes negatively charged, while the workpiece is grounded and positively charged. When the paint is sprayed from the head of the electrostatic spray gun 332, it captures the charge and becomes negatively charged. Under the action of airflow and electric field, it flies towards the workpiece and adheres to its surface. By setting an arc shape on the side close to the workpiece... The elastic block 343 is further coated with an electrode plate 345, which is connected to the negative terminal of the electrostatic generator 35. This results in the electrode plate 345 being negatively charged and the workpiece being positively charged, creating an electric field between them. The paint, being negatively charged, overcomes the airflow thrust under the influence of the electric field, thus changing its direction of movement and making the paint distribution in the overlapping area more uniform, thereby ensuring spraying quality. When the spraying pressure increases, the diffusion range of the paint increases, and the curvature of the contour curve of the overlapping area decreases. The curvature of the elastic block 343 is automatically adjusted by the movable element 344 to match the curvature of the overlapping area, thus ensuring the adjustment effect. After spraying, the workpiece enters the drying chamber 4 driven by the electric slide table 5, where the heating wire 6 operates to quickly dry the sprayed workpiece.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0062] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spraying device with a rapid drying function, characterized in that: The spraying device includes a base (1), a spraying box (2), a spraying mechanism (3), a drying box (4), an electric slide (5), and a heating wire (6). The spraying box (2) and the drying box (4) are fixedly connected to the base (1). The base (1) is provided with a guide rail (11). The electric slide (5) is slidably connected to the guide rail (11). The spraying box (2) is connected to the drying box (4). The heating wire (6) is installed on the inner wall of the drying box (4). The spraying mechanism (3) is fixedly connected to the base (1). The spraying mechanism (3) is arranged on both sides of the spraying box (2). The spraying box (2) and the drying box (4) are arranged sequentially along the conveying direction of the workpiece.

2. The spraying device with rapid drying function according to claim 1, characterized in that: The spraying mechanism (3) includes a column (31), a linear module (32), a spraying assembly (33), an adjustment assembly (34), and an electrostatic generator (35). The column (31) is fixedly connected to the base (1). The linear module (32) is slidably connected to the column (31). The spraying assembly (33) is fixedly connected to the linear module (32). The adjustment assembly (34) is fixedly connected to the spraying assembly (33). The spraying assembly (33) is externally connected to compressed air and paint source. The electrostatic generator (35) is fixedly connected to the base (1) and electrically connected to the spraying assembly (33).

3. A spraying device with rapid drying function according to claim 2, characterized in that: The spraying assembly (33) includes a bracket (331), an electrostatic spray gun (332), an air inlet pipe (333), and a feed pipe (334). The bracket (331) is fastened to the linear module (32). The electrostatic spray gun (332) is fastened to the bracket (331) and electrically connected to the electrostatic generator (35). Several electrostatic spray guns (332) are provided on the bracket (331). The air inlet pipe (333) is connected to the air inlet of the electrostatic spray gun (332) and is connected to compressed air. The feed pipe (334) is connected to the feed inlet of the electrostatic spray gun (332) and is connected to a paint source.

4. A spraying device with rapid drying function according to claim 3, characterized in that: The adjustment assembly (34) is located between the two electrostatic spray guns (332). The adjustment assembly (34) includes a connecting frame (341), a side support (342), an elastic block (343), a movable element (344), and an electrode plate (345). One end of the connecting frame (341) is fastened to the bracket (331), and the other end of the connecting frame (341) is fastened to the elastic block (343). The side support (342) is fastened to the connecting frame (341), and the side support... The support (342) is located on both sides of the connecting frame (341). One end of the movable element (344) is hinged to the side support (342), and the other end of the movable element (344) is hinged to the elastic block (343). The elastic block (343) is made of rubber and is arc-shaped. The electrode plate (345) is fastened to the elastic block (343). The electrode plate (345) faces the workpiece and is electrically connected to the negative electrode of the electrostatic generator (35).

5. A spraying device with rapid drying function according to claim 4, characterized in that: The movable element (344) includes a fixed sleeve (3441), a piston rod (3442), a return spring (3443), and a connecting pipe (3444). The fixed sleeve (3441) is hinged to the side support (342). One end of the piston rod (3442) is hinged to the elastic block (343), and the other end of the piston rod (3442) is slidably connected to the inner cavity of the fixed sleeve (3441). The fixed sleeve (3441) is divided into sections by the piston rod (3442). An air intake chamber (34411) and an adjustment chamber (34412) are provided. The air intake chamber (34411) is located on the side near the elastic block (343), and the adjustment chamber (34412) is located on the side near the side support (342). One end of the connecting pipe (3444) is connected to the air intake chamber (34411), and the other end of the connecting pipe (3444) is connected to the air intake pipe (333). The return spring (3443) is installed in the adjustment chamber (34412).

6. A spraying device with rapid drying function according to claim 5, characterized in that: The connecting frame (341) is equipped with a laser rangefinder (346), the detection end of the laser rangefinder (346) faces the workpiece, the laser rangefinder (346) is connected to an external detection power supply, the detection power supply and the laser rangefinder (346) constitute a detection circuit, the detection circuit is used to control the voltage transmitted from the electrostatic generator (35) to the electrode plate (345).

7. A spraying device with rapid drying function according to claim 6, characterized in that: A plurality of electrode plates (345) are mounted on the surface of the elastic block (343), and the voltage of the plurality of electrode plates (345) gradually increases from both sides of the elastic block (343) toward the center.

8. The spraying method of a spraying device with rapid drying function according to claim 7, characterized in that: The method includes the following steps: 1) First, place the workpiece to be sprayed on the electric slide (5) and clamp it; 2) The electric slide (5) moves along the guide rail (11), thereby driving the workpiece through the spray box (2), and the spraying mechanism (3) starts to spray the workpiece. 3) During the spraying process, the overlapping area of ​​the spraying is adjusted by adjusting the component (34); 4) After the spraying is completed, the workpiece enters the drying oven (4) driven by the electric slide (5) and is dried by the heating wire (6).

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