A coating device for enameled wire

Abstract

This utility model discloses a coating device for enameled wire, belonging to the technical field of coating devices for enameled wire. Its structure includes a base, a paint box mounted on the upper surface of the base, a mounting frame fixed at the top of the paint box, a vertical electric push rod inside the frame, and a pressure roller at the output end of the push rod. Guide rollers are mounted on the outer wall of the pressure roller and the side wall of the paint box, and the wire passes through the guide rollers. A "U"-shaped fixing frame is provided on one side of the paint box, through which the wire passes. Multiple hollow cylinders are fixed on the inner wall of the frame, and each hollow cylinder has a movable rod near the wire. Springs connect adjacent hollow cylinders and movable rods. In use, the wire first passes between the arc-shaped plates inside the fixing frame. After the device is started, the guide rollers on the side wall of the paint box and the outer wall of the pressure roller rotate, pulling the wire towards the paint box. When the wire passes the arc-shaped plates, the springs between the hollow cylinders and the movable rods push the arc-shaped plates to approach the wire from multiple directions, using uniform pressure to straighten the wire. At the same time, the ball bearings on the inner wall of the arc-shaped plates roll with the wire, reducing wear and preventing jamming.

Description

Technical Field

[0001] This utility model belongs to the technical field of enameling line painting devices, and specifically relates to an enameling line painting device. Background Technology

[0002] The enameling unit is a core piece of equipment specifically designed for the production of enameled wires. It uniformly coats the surface of metal conductors (such as copper or aluminum wires) with insulating varnish, and then dries and cures the varnish layer to form enameled wires with excellent insulation properties. It is a crucial link in the manufacturing chain of electrical and electronic products such as wires, cables, motors, and transformers, directly determining the core performance characteristics of the enameled wire, including insulation reliability, temperature resistance, and mechanical strength.

[0003] Application No. 202420527105.1 discloses a device for painting enameled wire. "This utility model, through the combined use of guide wheels and auxiliary wheels, enables the device to effectively fix and limit the wire body. Simultaneously, it uses a downward pressing method to install and position the wire body, making operation simple and convenient. Furthermore, the device is equipped with a drying box, which can effectively and quickly dry the wire body after painting, avoiding the secondary operation of manual drying and greatly improving the device's operating efficiency." In the aforementioned enameled wire painting process, if the wire body is not adequately pre-treated before entering the paint box for painting, two types of problems affecting the painting quality are likely to occur: Firstly, the wire body may be damaged due to previous pre-treatment... Deformations such as bending and displacement caused by transportation, storage, or external impacts can lead to uneven coating of the enamel wire if it is directly placed into the enamel box. This uneven coating will result in localized areas of excessive or insufficient enamel thickness or drips due to uneven stress and irregular orientation on the wire surface. Furthermore, the wire surface may have residual burrs or protrusions from production, or rust, oil, or other impurities from long-term exposure and storage. These surface defects can hinder the tight adhesion between the enamel and the wire, causing defects such as bubbles and pinholes in the enamel layer. This can also lead to subsequent enamel peeling, severely affecting the insulation performance and service life of the final enameled wire, and significantly reducing the overall effect of the coating process and the product qualification rate. Utility Model Content

[0004] The purpose of this invention is to provide a coating device for enameled wires to solve the problems mentioned in the background art.

[0005] To achieve the above objective, the utility model provides the following technical solution: a varnishing apparatus for enameled wires, comprising: a base, wherein a varnish tank is installed on the upper end surface of the base, a mounting frame is fixed at the top end of the varnish tank, a vertical electric push rod is installed in the mounting frame, a pressing wheel is installed at the output end of the electric push rod, wire guide wheels are installed on both the outer wall of the pressing wheel and the side wall of the varnish tank, and a wire body is threaded through the wire guide wheels; a fixing frame is arranged on one side of the varnish tank, the fixing frame is in a shape of a square frame, the wire body passes through the fixing frame, a plurality of hollow cylinders are fixed on the inner wall of the fixing frame, a movable rod is arranged on one side of each hollow cylinder close to the wire body, a spring is connected between each adjacent hollow cylinder and movable rod, a position limiting assembly is arranged between each adjacent hollow cylinder and movable rod, an arc-shaped plate is fixed at one end of each movable rod close to the wire body, and a plurality of rolling assemblies are installed in each arc-shaped plate.

[0006] Preferably, the position limiting assembly comprises a position limiting groove, a position limiting block and an anti-drop block, the position limiting groove is formed on the inner wall of the hollow cylinder along the expansion and contraction direction of the spring, the position limiting block is fixed on the outer wall of the movable rod, the position limiting groove is matched with the position limiting block, and the anti-drop block is fixed on the inner wall of the position limiting groove, so as to prevent the movable rod from dropping off from the hollow cylinder.

[0007] Preferably, the rolling assembly comprises a rolling groove and a ball, the rolling groove is formed on the outer wall of the arc-shaped plate close to the wire body, and the ball is installed in the rolling groove.

[0008] Through the above technical solution:

[0009] When in use, the wire body is firstly threaded between the arc-shaped plates inside the fixing frame. Since the fixing frame is of a square-frame structure, and the plurality of arc-shaped plates are distributed around the wire body, a regular passing channel is provided for the wire body in the initial state. After the apparatus is started, the wire guide wheels on the side wall of the varnish tank and the outer wall of the pressing wheel start to operate, and pull the wire body through the traction force generated by their own rotation, so that the wire body moves smoothly towards the direction close to the varnish tank along a preset path.

[0010] When the wire body passes through the area of the arc-shaped plates, the spring between the hollow cylinder and the movable rod exerts an elastic effect: the spring releases elastic force to push the movable rod, driving the arc-shaped plate fixedly connected to one end of the movable rod to approach the wire body synchronously. Since the plurality of arc-shaped plates are close to the wire body together from different directions, they can form uniform lateral extrusion force on the wire body. This extrusion force can act on the surface of the wire body, completely straightening the bent and offset parts of the wire body generated during the conveying process, ensuring that the wire body enters the subsequent varnishing link in a straight state. At the same time, the balls in the rolling grooves on the inner wall of the arc-shaped plates will contact the surface of the wire body as the wire body moves and roll flexibly in the rolling grooves, converting the sliding friction between the arc-shaped plates and the wire body into rolling friction, which not only reduces the wear on the surface of the wire body, but also avoids the phenomena of jamming and stagnation of the wire body caused by excessive frictional resistance, ensuring the fluency of wire body conveying.

[0011] The straightened cable continues to move smoothly to the area above the paint box, guided by the guide rollers. The paint box, as the core area for painting, contains a sufficient amount of paint pre-stored to provide the raw material for the painting process. At this point, the vertical electric push rod inside the mounting frame is activated. The output end of the electric push rod extends downwards, causing the pressure roller at its end to move down synchronously. During its descent, the pressure roller applies downward pressure to the cable below, precisely pressing the cable, originally above the paint box, into the paint inside. This ensures the cable surface is fully saturated with paint, ultimately completing a full painting operation.

[0012] A polishing box is provided between the paint box and the fixed frame. A rotary motor is installed on the side wall of the polishing box. A main gear is connected to the output end of the rotary motor. A secondary gear is installed on the side of the main gear. A polishing cylinder is installed on the side wall of the secondary gear, and the production line passes through the polishing cylinder.

[0013] Preferably, the outer wall of the grinding cylinder is provided with a plurality of through holes evenly distributed, and the bottom of the inner wall of the grinding box is provided with a pull-out collection pool.

[0014] Through the above technical solution:

[0015] In use, the line, after being straightened by the arc plate inside the fixed frame, continues to move along the preset conveying path in a straight state and smoothly enters the polishing box located between the paint box and the fixed frame, starting the surface pretreatment process before painting.

[0016] At this point, the rotary motor installed on the side wall of the grinding box is started, and the motor output shaft begins to rotate at high speed. The main gear fixedly connected to its end rotates synchronously. Because the main gear and the auxiliary gear on the side maintain a precise meshing state, the rotational power of the main gear is smoothly transmitted to the auxiliary gear through the meshing transmission between the gears, driving the auxiliary gear to rotate at the same transmission ratio. The side wall of the auxiliary gear is fixedly connected to the grinding cylinder inside the grinding box. As the auxiliary gear rotates, the grinding cylinder also starts to rotate, forming a continuous grinding power source.

[0017] Because the production line passes precisely through the center of the grinding cylinder, and the inner wall of the grinding cylinder is lined with fine abrasive media (such as a layer of diamond abrasive or sandpaper rings), the abrasive media on the inner wall comes into close contact with the outer surface of the production line during the high-speed rotation of the grinding cylinder. This allows for comprehensive grinding and cleaning of oil stains, dust, and other contaminants adhering to the production line surface, as well as rust accumulated over long-term storage, and uneven areas such as burrs and protrusions left over from the production process. During the grinding process, the production line is fed forward at a constant speed, ensuring that the grinding cylinder can perform uniform and continuous treatment on its outer surface. This results in a smooth and clean pretreatment standard for the production line surface, laying a good foundation for the subsequent painting process.

[0018] Meanwhile, wastes such as metal chips and rust powder generated during the grinding process are rapidly thrown against the inner wall of the grinding cylinder under the action of centrifugal force generated by the high-speed rotation of the grinding cylinder. Since a plurality of through holes penetrating the outer wall of the grinding cylinder are evenly opened, these wastes can quickly leave the grinding cylinder through the through holes and be thrown outward. The wastes leaving the grinding cylinder vertically fall into the aggregate tank at the bottom end of the inner wall of the grinding box under the action of their own gravity. The aggregate tank adopts a drawable design, which can completely receive all dropped wastes, avoiding the situation that wastes accumulate inside the grinding box to affect the grinding effect or cause equipment jamming. When the wastes in the aggregate tank accumulate to a certain amount, workers can directly draw the aggregate tank out from the outside of the grinding box for cleaning, which is convenient and efficient in operation.

[0019] Preferably, a drying box is provided on a side of the paint box away from the grinding box, and the wire body passes through the drying box.

[0020] Specifically, after the painting operation is completed, the wire body with wet paint covering its surface smoothly enters the drying box behind the paint box under the guidance of the wire guide wheels; a stable temperature adapted to the characteristics of the paint and a hot air circulation system are preset in the drying box, which can quickly remove moisture and volatile solvents in the paint layer, and simultaneously promote cross-linking and curing of paint molecules, so that a dense and smooth insulating protective layer is formed on the surface of the wire body. After the wire body completely passes through the drying box, the thoroughly dried paint layer can support the wire body to smoothly enter subsequent wire take-up and detection processes, avoiding the problems of sagging, adhesion or pollution of wet paint.

[0021] Compared with the prior art, the beneficial effects of the present utility model are:

[0022] (1) When the present utility model is used, the wire body is firstly threaded into the square-shaped fixed frame between the arc-shaped plates distributed around the wire body. After the device is started, the wire guide wheels on the side wall of the paint box and the outer wall of the pressure wheel operate and pull the wire body to move steadily toward the paint box; when the wire body passes through the arc-shaped plates, the spring between the hollow cylinder and the movable rod pushes the movable rod to drive the arc-shaped plates to approach the wire body from multiple directions, straightening the bent and deviated parts of the wire body with uniform lateral extrusion force. Meanwhile, the balls in the rolling grooves on the inner walls of the arc-shaped plates roll along with the movement of the wire body, converting sliding friction into rolling friction, reducing the wear of the wire body and avoiding jamming, ensuring that the wire body enters subsequent links straightly and smoothly.

[0023] (2) When this utility model is in use, the line straightened by the arc plate of the fixed frame enters the grinding box between the paint box and the fixed frame along the preset path; the rotating motor on the side wall of the grinding box is started, the motor drives the main gear to rotate, and then the auxiliary gear is rotated synchronously through the gear transmission, which in turn drives the grinding cylinder connected to the auxiliary gear to rotate. The grinding medium on the inner wall of the grinding cylinder rotates at high speed with it, cleaning the stains, rust and burrs on the surface of the line in all directions, and the line is conveyed at a uniform speed to ensure uniform grinding; the waste generated by grinding is thrown out through the through hole of the grinding cylinder under the action of centrifugal force, and finally falls into the pull-out collection pool at the bottom of the grinding box due to gravity, which not only avoids the accumulation of waste affecting the equipment, but also facilitates subsequent cleaning, and prepares the line for painting. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the paint box of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the fixing frame of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the grinding cylinder of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the spring of this utility model.

[0029] In the diagram: 1. Base; 2. Paint box; 3. Mounting frame; 4. Electric push rod; 5. Pressure roller; 6. Guide roller; 7. Production line; 8. Fixing frame; 9. Hollow cylinder; 10. Movable rod; 11. Spring; 12. Arc plate; 13. Groove; 14. Ball bearing; 15. Limiting groove; 16. Limiting block; 17. Anti-detachment block; 18. Grinding box; 19. Rotary motor; 20. Main gear; 21. Secondary gear; 22. Grinding cylinder; 23. Collection pool; 24. Drying box. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-5As shown, the utility model provides the following technical solution: an enameling device for enameled wires, comprising: a base 1, a paint tank 2 mounted on an upper end surface of the base 1, a mounting frame 3 fixed on a top end of the paint tank 2, a vertical electric push rod 4 mounted in the mounting frame 3, a pressing wheel 5 mounted at an output end of the electric push rod 4, wire guide wheels 6 respectively mounted on an outer wall of the pressing wheel 5 and a side wall of the paint tank 2, and a wire body 7 threaded through the wire guide wheels 6; a fixing frame 8 arranged on one side of the paint tank 2, wherein the fixing frame 8 is in a "square" shape, the wire body 7 passes through the fixing frame 8, a plurality of hollow cylinders 9 are fixed on an inner wall of the fixing frame 8, a movable rod 10 is arranged on a side of each hollow cylinder 9 close to the wire body 7, a spring 11 is connected between each adjacent hollow cylinder 9 and the movable rod 10, a limiting assembly is arranged between each adjacent hollow cylinder 9 and the movable rod 10, an arc-shaped plate 12 is fixed on an end of each movable rod 10 close to the wire body 7, and a plurality of rolling assemblies are mounted in each arc-shaped plate 12.

[0032] Further, the limiting assembly comprises a limiting groove 15, a limiting block 16 and a detachment prevention block 17, the limiting groove 15 is formed on an inner wall of the hollow cylinder 9 along an expansion and contraction direction of the spring 11, the limiting block 16 is fixed on an outer wall of the movable rod 10, the limiting groove 15 is adapted to the limiting block 16, and the detachment prevention block 17 is fixed on an inner wall of the limiting groove 15, so as to prevent the movable rod 10 from detaching from the hollow cylinder 9.

[0033] Further, the rolling assembly comprises a rolling groove 13 and a rolling ball 14, the rolling groove 13 is formed on an outer wall of the arc-shaped plate 12 close to the wire body 7, and the rolling ball 14 is mounted in the rolling groove 13.

[0034] Through the above technical solution:

[0035] When in use, the wire body 7 is firstly threaded between the arc-shaped plates 12 inside the fixing frame 8. Since the fixing frame 8 has a square-shaped structure and the plurality of arc-shaped plates 12 are distributed around the wire body 7, a regular passage for the wire body 7 is provided in an initial state. After the device is started, the wire guide wheels 6 on the side wall of the paint tank 2 and the outer wall of the pressing wheel 5 start to operate, and pull the wire body 7 through the traction force generated by their rotation, so that the wire body 7 moves stably in a direction close to the paint tank 2 along a preset path.

[0036] When the line body 7 passes through the area of ​​the arc plate 12, the spring 11 between the hollow cylinder 9 and the movable rod 10 plays an elastic role: the spring 11 releases its elastic force to push the movable rod 10, causing the arc plate 12, which is fixedly connected to one end of the movable rod 10, to move towards the line body 7 simultaneously. As multiple arc plates 12 approach the line body 7 from different directions, they will form a uniform lateral squeezing force on it. This squeezing force can act on the surface of the line body 7, completely straightening the bending and offset parts of the line body 7 caused during the conveying process, ensuring that the line body 7 enters the subsequent painting stage in a straight state. At the same time, the ball bearings 14 in the roller groove 13 on the inner wall of the arc plate 12 will come into contact with the surface of the line body 7 as the line body 7 moves and roll flexibly in the roller groove 13, converting the sliding friction between the arc plate 12 and the line body 7 into rolling friction. This reduces the wear on the surface of the line body 7 and avoids the line body 7 from getting stuck or stopping due to excessive frictional resistance, ensuring the smooth conveying of the line body 7.

[0037] The straightened cable 7 continues to move smoothly to the area above the paint tank 2 under the guidance of the guide roller 6. The paint tank 2, as the core area for painting, contains a sufficient amount of paint to provide the raw material for the painting operation. At this time, the vertical electric push rod 4 in the mounting frame 3 is activated. The output end of the electric push rod 4 extends downward, driving the pressure roller 5 installed at its end to move down synchronously. During the descent, the pressure roller 5 applies downward pressure to the cable 7 below, accurately pressing the cable 7, which was originally above the paint tank 2, into the paint in the paint tank 2, so that the surface of the cable 7 is fully saturated with paint, and finally completing a complete painting operation.

[0038] Please see Figures 1-4 As shown, a polishing box 18 is provided between the paint box 2 and the fixed frame 8. A rotary motor 19 is installed on the side wall of the polishing box 18. The output end of the rotary motor 19 is connected to the main gear 20. A secondary gear 21 is installed on the side of the main gear 20. A polishing cylinder 22 is installed on the side wall of the secondary gear 21, and the line 7 passes through the polishing cylinder 22.

[0039] Furthermore, the outer wall of the grinding cylinder 22 is evenly provided with multiple through holes, and the bottom of the inner wall of the grinding box 18 is equipped with a pull-out collection pool 23.

[0040] Through the above technical solution:

[0041] In use, the line 7, after being straightened by the arc plate 12 inside the fixed frame 8, continues to move along the preset conveying path in a straight state and smoothly enters the polishing box 18 located between the paint box 2 and the fixed frame 8, thus starting the surface pretreatment process before painting.

[0042] At this time, the rotary motor 19, installed on the side wall of the grinding box 18, is started. The output shaft of the motor begins to rotate at high speed, and the main gear 20, which is fixedly connected to its end, rotates synchronously. Since the main gear 20 and the auxiliary gear 21 on the side maintain a precise meshing state, the rotational power of the main gear 20 is smoothly transmitted to the auxiliary gear 21 through the meshing transmission between the gears, driving the auxiliary gear 21 to rotate at the same transmission ratio. The side wall of the auxiliary gear 21 is fixedly connected to the grinding cylinder 22 inside the grinding box 18. As the auxiliary gear 21 rotates, the grinding cylinder 22 also starts to rotate, forming a continuous grinding power source.

[0043] Because the production line 7 passes precisely through the center of the grinding cylinder 22, and the inner wall of the grinding cylinder 22 is lined with fine abrasive media (such as a layer of diamond abrasive or sandpaper rings), during the high-speed rotation of the grinding cylinder 22, the abrasive media on the inner wall comes into close contact with the outer surface of the production line 7. This allows for comprehensive grinding and cleaning of oil stains, dust, and other contaminants adhering to the surface of the production line 7, as well as rust accumulated over long-term storage, and uneven areas such as burrs and protrusions left over from the production process. During the grinding process, the production line 7 is always conveyed forward at a uniform speed, ensuring that the grinding cylinder 22 can perform uniform and continuous treatment on its outer surface. This achieves a smooth and clean pretreatment standard for the production line 7, laying a good foundation for the subsequent painting process.

[0044] Meanwhile, metal shavings, rust, and other waste generated during the grinding process are rapidly thrown towards the inner wall of the grinding cylinder 22 by the centrifugal force generated by the high-speed rotation of the grinding cylinder 22. Since the outer wall of the grinding cylinder 22 has multiple through holes evenly distributed, these waste materials quickly detach from the grinding cylinder 22 through these holes and are thrown outwards. Under their own gravity, the waste materials detach from the grinding cylinder 22 fall vertically into the collection pool 23 at the bottom of the inner wall of the grinding box 18. This collection pool 23 is designed to be retractable, capable of completely catching all the falling waste materials, preventing waste from accumulating inside the grinding box 18 and affecting the grinding effect or causing equipment jamming. When the waste material in the collection pool 23 accumulates to a certain amount, the operator can directly pull it out from the outside of the grinding box 18 for cleaning, making the operation convenient and efficient.

[0045] For further details, please refer to Figures 1-2 As shown, a drying box 24 is provided on the side of the paint box 2 away from the polishing box 18, and the production line 7 passes through the drying box 24.

[0046] Specifically, after the painting process is completed, the wire 7, with its surface covered with wet paint, is smoothly guided into the drying chamber 24 behind the paint box 2 by the guide roller 6. The drying chamber 24 is equipped with a stable temperature and hot air circulation system adapted to the characteristics of the paint, which can quickly remove the moisture and volatile solvents in the paint layer, while promoting the cross-linking and curing of the paint molecules, so that a dense and smooth insulating protective layer is formed on the surface of the wire 7. After the wire 7 has completely passed through the drying chamber 24, the thoroughly dried paint layer can support its smooth entry into the subsequent winding and inspection processes, avoiding problems such as dripping, sticking or contamination of wet paint.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coating device for enameled wire, characterized in that, Comprising: a base (1), wherein a paint tank (2) is mounted on an upper end surface of the base (1), a mounting frame (3) is fixed at a top end of the paint tank (2), a vertical electric push rod (4) is mounted in the mounting frame (3), a pressure wheel (5) is mounted at an output end of the electric push rod (4), wire guide wheels (6) are mounted on an outer wall of the pressure wheel (5) and a side wall of the paint tank (2) respectively, and a wire body (7) is threaded through the wire guide wheels (6); a fixing frame (8) is arranged on one side of the paint tank (2), the fixing frame (8) is in a shape of a square frame, the wire body (7) passes through the fixing frame (8), a plurality of hollow cylinders (9) are fixed on an inner wall of the fixing frame (8), a movable rod (10) is arranged on one side, close to the wire body (7), of each hollow cylinder (9), a spring (11) is connected between each adjacent hollow cylinder (9) and the corresponding movable rod (10), a limiting assembly is arranged between each adjacent hollow cylinder (9) and the corresponding movable rod (10), an arc-shaped plate (12) is fixed at one end, close to the wire body (7), of each movable rod (10), and a plurality of rolling assemblies are mounted in each arc-shaped plate (12).

2. The enameling device for an enameled wire according to claim 1, characterized in that: the limiting assembly comprises a limiting groove (15), a limiting block (16) and a detachment-preventing block (17), the limiting groove is formed in an inner wall of the hollow cylinder (9) along the expansion and contraction direction of the spring (11), the limiting block (16) is fixed on an outer wall of the movable rod (10), the limiting groove (15) is adapted to the limiting block (16), and the detachment-preventing block (17) is fixed on an inner wall of the limiting groove (15).

3. The enameling device for an enameled wire according to claim 1, characterized in that: the rolling assembly comprises a rolling groove (13) and a ball (14), the rolling groove (13) is formed in an outer wall, close to the wire body (7), of the arc-shaped plate (12), and the ball (14) is mounted in the rolling groove (13).

4. The enameling device for an enameled wire according to claim 1, characterized in that: a grinding box (18) is arranged between the paint tank (2) and the fixing frame (8), a rotating motor (19) is mounted on a side wall of the grinding box (18), an output end of the rotating motor (19) is connected with a main gear (20), an auxiliary gear (21) is engaged and mounted at a side of the main gear (20), a grinding cylinder (22) is mounted on a side wall of the auxiliary gear (21), and the wire body (7) passes through the grinding cylinder (22).

5. The enameling device for an enameled wire according to claim 4, characterized in that: a plurality of through holes are uniformly formed in an outer wall of the grinding cylinder (22), and a drawable material collecting tank (23) is mounted at a bottom end of an inner wall of the grinding box (18).

6. The enameling device for an enameled wire according to claim 1, characterized in that: a drying box (24) is arranged on one side, away from the grinding box (18), of the paint tank (2), and the wire body (7) passes through the drying box (24).

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