Equipment for coating antirust layer on surface of fastener

Abstract

The utility model relates to the technical field of fastener surface treatment, in particular to coating equipment for an antirust layer on the surface of a fastener, which comprises a support, two side frames, a conveyor belt, a coating component and a collecting component, and the two side frames are fixedly mounted on two sides of the top of the support; the coating assembly is mounted between the two side frames and used for periodically shaking the conveying belt, so that the fasteners placed on the conveying belt are continuously turned over in the conveying process to be coated with an anti-rust layer; and the collecting assembly is arranged below the conveying belt and used for collecting and reusing redundant paint generated when the fasteners passing through the upper portion of the conveying belt are subjected to spraying work. Compared with the prior art, the problems that traditional equipment is low in coating efficiency, poor in continuity and weak in recycling capacity are solved.

Description

Technical Field

[0001] This utility model relates to the field of fastener surface treatment technology, and in particular to a device for coating a rust-proof layer on the surface of fasteners. Background Technology

[0002] Fasteners (such as bolts, nuts, and washers) are indispensable basic parts in mechanical assembly and are widely used in the automotive, aerospace, and construction industries. Because metal fasteners are exposed to corrosive environments such as moisture and salt spray for extended periods, they are highly susceptible to corrosion, leading to decreased mechanical performance and even failure. Therefore, applying anti-rust coatings (such as electroplating, Dacromet coating, and phosphating) to the surface of fasteners is a key process to improve their corrosion resistance and service life. Currently, traditional fastener anti-rust coating equipment suffers from the following main defects: insufficient coating uniformity, especially inadequate coverage of complex structures such as threads and grooves; low automation, relying on manual flipping or multiple coatings, resulting in low efficiency; significant waste of anti-rust solution, lacking an efficient recovery system; and rigid equipment structure, making it difficult to adapt to fasteners of different shapes and sizes. These problems lead to unstable coating quality and high production costs, necessitating a new type of coating equipment to overcome these technical bottlenecks.

[0003] In the prior art, Chinese patent document CN213727460U, entitled "A Surface Anti-rust Coating Device for Fastener Processing," proposes a device that uses a base plate fixedly connected to the bottom of an anti-rust oil tank at the top, and the bottom of the base plate fixedly connected to the bottom of two supports. The two supports support the threaded rod. When a servo motor is started, the threaded sleeve moves left and right along the threaded rod. The threaded sleeve drives the hydraulic cylinder at the bottom to move synchronously with the threaded sleeve. This achieves the device's low energy consumption and reduced production costs. However, in practical applications, the above technical solution relies on the hydraulic cylinder and movable hook for manual operation of the soaking tank, which is inefficient and difficult to operate continuously. At the same time, the coating recycling and reuse capabilities are poor. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a rust-proof coating equipment for fastener surfaces, so as to solve the problems of low coating efficiency, poor continuity and weak recycling capacity in traditional equipment.

[0005] To achieve the above objectives, this utility model provides a device for coating a rust-proof layer on the surface of fasteners, including a support, two side frames, a conveyor belt, a coating assembly, and a collection assembly. The two side frames are fixedly installed on the top two sides of the support, and the conveyor belt is rotatably installed between the two side frames.

[0006] A coating assembly, installed between the two side frames, is used to periodically vibrate the conveyor belt, causing the fasteners placed on the conveyor belt to be continuously flipped over and coated with an anti-rust layer during the transfer process.

[0007] A collection component, located below the conveyor belt, is used to collect and reuse excess paint generated during the spraying of fasteners passing above the conveyor belt.

[0008] Preferably, the coating assembly includes two drive rollers rotatably mounted in the middle of the two side frames. The conveyor belt is sleeved on the two drive rollers and connected for transmission. A plurality of vibrating rollers are rotatably connected between the two side frames. The vibrating rollers are in contact with one side of the conveyor belt. A plurality of protrusions are fixedly mounted on the vibrating rollers. A feed pipe is fixedly connected to one side of the support. A transfer pipe is connected above the feed pipe. A plurality of first nozzles extend from one side of the transfer pipe toward the vibrating rollers. A conveying pipe is connected above the transfer pipe. A second nozzle is connected to the other end of the conveying pipe.

[0009] Preferably, the collecting component includes a collecting trough located directly below the conveyor belt, a storage bin is fixedly connected to the center of the collecting trough, and a discharge pipe is connected to one side of the storage bin through the support.

[0010] Preferably, the conveyor belt is a strip-shaped part with a densely perforated portion on its surface, and the size of the perforated portion on the conveyor belt is smaller than the size of the fastener.

[0011] Preferably, a protective plate is fixedly connected to the top of the side frame, the second nozzle passes through the protective plate and is located above the conveyor belt, the transfer pipe passes through the side frame and is located in the middle of the conveyor belt, and multiple pressurizing nozzles are provided on both the first nozzle and the second nozzle, with the pressurizing nozzles of the first nozzle and the second nozzle facing each other.

[0012] Preferably, a motor is fixedly installed on one side of the bracket, a chain is sleeved on one side of the drive shaft of the motor, a sprocket is sleeved on the other end of the chain, the sprocket is rotatably installed on one side of the side frame, and the sprocket passes through the side frame and is fixed to a transmission roller.

[0013] Preferably, a pulley is fixedly installed on one side of the drive roller, and a pulley is provided on the vibrating roller adjacent to the drive roller. A belt is sleeved between the two pulleys, and the vibrating roller is connected to the vibrating roller on the other side of the adjacent roller through the belt.

[0014] Preferably, the collection trough is located directly below the conveyor belt and is funnel-shaped, with the through trough fixedly connected to the storage bin.

[0015] The beneficial effects of this utility model are:

[0016] 1. This equipment for coating rust-proof coating on fastener surfaces uses protrusions on vibrating rollers to periodically lift the conveyor belt, causing the fasteners to automatically flip during transport. Combined with bidirectional cross-spraying from the middle of the first spray nozzle and the second spray nozzle (top), it ensures that the rust-proof liquid covers all surfaces of the fasteners, including complex structures such as threads and grooves, completely eliminating coating dead corners. At the same time, the tracked working mode provides stronger connectivity and higher efficiency.

[0017] 2. This equipment for applying anti-rust coating to fastener surfaces features a recycling system consisting of a funnel-shaped collection tank and a storage bin. This system can quickly collect dripping anti-rust liquid, which is then discharged through a discharge pipe, filtered, and reused, reducing material waste. At the same time, the enclosed design with a protective plate and collection tank prevents liquid splashing or evaporation, combining environmental friendliness and economy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal parts structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the collection component of this utility model.

[0023] The diagram is marked as follows:

[0024] 1. Support frame; 2. Side frame; 3. Conveyor belt; 4. Drive roller; 5. Vibrating roller; 6. Sprocket; 7. Chain; 8. Motor; 9. Protrusion; 10. Feed pipe; 11. Transfer pipe; 12. Conveying pipe; 13. First nozzle; 14. Second nozzle; 15. Guard plate; 16. Collection trough; 17. Storage bin; 18. Discharge pipe; 19. Pulley; 20. Belt. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0026] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] like Figures 1 to 4 As shown, a rust-preventive coating device for fastener surfaces includes a support 1, two side frames 2, a conveyor belt 3, a coating assembly, and a collection assembly. The two side frames 2 are fixedly installed on the top two sides of the support 1. The conveyor belt 3 is a strip-shaped part with a dense perforated portion on its surface. The size of the perforated portion on the conveyor belt 3 is smaller than the size of the fastener. The dense perforated structure on the surface of the conveyor belt 3 can prevent the fastener from falling out of the hole during the conveying process, and at the same time drive its movement to ensure that spray dead corners are avoided during coating.

[0028] Furthermore, such as Figures 1 to 4As shown, the coating assembly, installed between the two side frames 2, is used to periodically vibrate the conveyor belt 3, causing the fasteners placed on the conveyor belt 3 to continuously flip over during transmission for rust-preventive coating. It includes two drive rollers 4, rotatably mounted in the middle of the two side frames 2. The conveyor belt 3 is fitted onto the two drive rollers 4 and connected for transmission. Multiple vibrating rollers 5 are rotatably connected between the two side frames 2, with each vibrating roller 5 tightly fitted to one side of the conveyor belt 3. Multiple protrusions 9 are fixedly mounted on the vibrating rollers 5. A feed pipe 1 is fixedly connected to one side of the support 1. 0. A transfer pipe 11 is connected above the feed pipe 10. Multiple first nozzles 13 extend from one side of the transfer pipe 11 toward the vibrating roller 5. A conveying pipe 12 is connected above the transfer pipe 11. A second nozzle 14 is connected to the other end of the conveying pipe 12. A guard plate 15 is fixedly connected to the top of the side frame 2. The second nozzle 14 passes through the guard plate 15 and is located above the conveyor belt 3. The transfer pipe 11 passes through the side frame 2 and is located in the middle of the conveyor belt 3. Multiple pressurizing nozzles are provided on both the first nozzles 13 and the second nozzles 14. The pressurizing nozzles of the first nozzles 13 and the second nozzles 14 face each other. The setup includes a motor 8 fixedly mounted on one side of the support frame 1. A chain 7 is fitted onto one side of the drive shaft of the motor 8, and a sprocket 6 is fitted onto the other end of the chain 7. The sprocket 6 is rotatably mounted on one side of the side frame 2, passing through the side frame 2 and fixed to a transmission roller 4. A pulley 19 is fixedly mounted on one side of the transmission roller 4, and a pulley 19 is also provided on the vibrating roller 5 adjacent to the transmission roller 4. A belt 20 is fitted between the two pulleys 19, and the vibrating roller 5 is also connected to the adjacent vibrating roller 5 on the other side via the belt 20. The protrusions 9 on the vibrating roller 5 periodically push up the conveyor belt 3 to tighten it. During transport, the parts are continuously flipped to ensure that the rust-preventive liquid (such as chromium coating, phosphating solution, etc.) can evenly cover all surfaces, including threads, grooves, and other dead corners that are difficult to cover with traditional spraying. Compared with static transport, dynamic shaking can reduce liquid accumulation and avoid excessive coating thickness or uneven dripping. The first spray nozzle 13 sprays from the middle of the conveyor belt 3, focusing on covering the sides and bottom of the fasteners. The second spray nozzle 14 sprays downwards through the guard plate 15, covering the upper surface of the fasteners. The pressurized nozzles are set opposite each other to form a cross-spray flow field, reducing airflow interference and improving coating uniformity. The pulley 19 A belt 20 is added to link the vibrating roller 5, causing multiple vibrating rollers 5 to rotate synchronously, ensuring consistent vibration frequency and avoiding uneven local vibration. The feed pipe 10 centrally supplies liquid, which is then distributed to the first spray nozzle 13 (middle spraying) through the transfer pipe 11, and supplied to the second spray nozzle 14 (top spraying) through the conveyor pipe 12. This reduces pipeline redundancy, lowers the risk of blockage, and shortens the liquid delivery path, reducing rust inhibitor sedimentation and maintaining stable spray concentration. The guard plate 15 prevents spray splashing and contamination of the equipment exterior, while also guiding airflow to prevent rust inhibitor atomization and diffusion. When using the equipment, the fasteners to be treated (such as bolts, nuts, etc.) are first placed onto the conveyor belt 3. The hollow structure of the conveyor belt 3 prevents the fasteners from falling off. The power is then turned on, and the motor 8 drives the sprocket 6 through the chain 7, which in turn drives the transmission roller 4 to rotate.The conveyor belt 3 moves continuously, and the drive roller 4, linked by the belt 20, rotates synchronously with the vibrating roller 5. The protrusions 9 on the vibrating roller 5 periodically lift the conveyor belt 3, causing the fasteners to flip continuously during transport, ensuring all surfaces are covered by the coating. Rust inhibitor is then introduced from the outside through the feed pipe 10 into the transfer pipe 11, and diverted to the first spray nozzle 13. The pressurized nozzle of the first spray nozzle 13 sprays the fasteners from the middle of the conveyor belt 3 towards the sides and bottom. The rust inhibitor enters the second spray nozzle 14 through the transfer pipe 12, penetrating the guard plate 15 and spraying downwards to cover the upper surface of the fasteners. The pressurized nozzles are positioned opposite each other, forming a cross-spray flow field to improve coating uniformity.

[0029] Furthermore, such as Figures 1 to 4 As shown, a collection component, located below the conveyor belt 3, is used to collect and reuse excess paint generated during the spraying of fasteners passing above the conveyor belt 3. It includes a collection trough 16, directly below the conveyor belt 3. A storage bin 17 is fixedly connected to the center of the collection trough 16. A discharge pipe 18 passes through a support 1 on one side of the storage bin 17. The collection trough 16 is funnel-shaped, with a longer length on the side closer to the conveyor belt 3 and a shorter length on the side farther from the conveyor belt 3. A through groove is formed at the shortest point, and the through groove is fixedly connected to the storage bin 17. The inclined design (longer on the side closer to the conveyor belt 3 and shorter on the side farther away) allows the dripping rust inhibitor to flow naturally towards the center, avoiding accumulation. The through-channel structure directly connects to the collection bin 17, reducing liquid retention and improving recycling efficiency. The collection bin 17 centrally stores waste liquid, which can be easily pumped back to the circulation system or discharged through the discharge pipe 18. The overall closed design prevents the rust inhibitor from evaporating or splashing. When the equipment is in use, when the first spray pipe 13 and the second spray pipe 14 are spraying, excess rust inhibitor drips through the hollow part of the conveyor belt 3. The dripping liquid enters the funnel-shaped collection tank 16, flows along the inclined surface to the through-channel, and the liquid flows into the collection bin 17 through the through-channel. After the impurities settle, it is discharged through the discharge pipe 18.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0031] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for coating a rust-preventive layer on the surface of fasteners, characterized in that, include: The bracket (1), two side frames (2), a conveyor belt (3), a coating assembly and a collection assembly are provided. The two side frames (2) are fixedly installed on the top sides of the bracket (1), and the conveyor belt (3) is rotatably installed between the two side frames (2). The coating assembly is installed between the two side frames (2) for periodically shaking the conveyor belt (3) so that the fasteners placed on the conveyor belt (3) are continuously flipped over and coated with the anti-rust layer during the transmission process. A collection component, located below the conveyor belt (3), is used to collect and reuse excess paint generated during the spraying of fasteners passing above the conveyor belt (3).

2. The equipment for coating a rust-proof layer on the surface of fasteners according to claim 1, characterized in that, The coating assembly includes two drive rollers (4), which are rotatably mounted in the middle of the two side frames (2). The conveyor belt (3) is sleeved on the two drive rollers (4) and connected to them. Multiple vibrating rollers (5) are rotatably connected between the two side frames (2). The vibrating rollers (5) are in contact with one side of the conveyor belt (3). Multiple protrusions (9) are fixedly mounted on the vibrating rollers (5). A feed pipe (10) is fixedly connected to one side of the bracket (1). A transfer pipe (11) is connected above the feed pipe (10). Multiple first nozzles (13) extend from one side of the transfer pipe (11) toward the vibrating rollers (5). A conveying pipe (12) is connected above the transfer pipe (11). A second nozzle (14) is connected to the other end of the conveying pipe (12).

3. The equipment for coating a rust-proof layer on the surface of fasteners according to claim 2, characterized in that, The collection assembly includes a collection trough (16) located directly below the conveyor belt (3). A storage bin (17) is fixedly connected to the center of the collection trough (16). A discharge pipe (18) is connected to one side of the storage bin (17) through the support (1).

4. The equipment for coating a rust-proof layer on the surface of fasteners according to claim 1, characterized in that, The conveyor belt (3) is a strip-shaped part with a dense hollowed-out portion on its surface. The size of the hollowed-out portion on the conveyor belt (3) is smaller than the size of the fastener.

5. The equipment for coating a rust-proof layer on the surface of fasteners according to claim 2, characterized in that, A guard plate (15) is fixedly connected to the top of the side frame (2). The second nozzle (14) passes through the guard plate (15) and is located above the conveyor belt (3). The transfer pipe (11) passes through the side frame (2) and is located in the middle of the conveyor belt (3). Multiple pressurizing nozzles are provided on both the first nozzle (13) and the second nozzle (14). The pressurizing nozzles of the first nozzle (13) and the second nozzle (14) are arranged opposite to each other.

6. The equipment for coating a rust-proof layer on the surface of fasteners according to claim 2, characterized in that, A motor (8) is fixedly installed on one side of the bracket (1). A chain (7) is sleeved on one side of the drive shaft of the motor (8). A sprocket (6) is sleeved on the other end of the chain (7). The sprocket (6) is rotatably installed on one side of the side frame (2). The sprocket (6) passes through the side frame (2) and is fixed to a transmission roller (4).

7. The equipment for coating a rust-proof layer on the surface of fasteners according to claim 2, characterized in that, A pulley (19) is fixedly installed on one side of the transmission roller (4), and a pulley (19) is provided on the vibration roller (5) adjacent to the transmission roller (4). A belt (20) is sleeved between the two pulleys (19), and the vibration roller (5) is connected to the vibration roller (5) on the other side of the adjacent side through the belt (20).

8. The equipment for coating a rust-proof layer on the surface of fasteners according to claim 3, characterized in that, The collection trough (16) is located directly below the conveyor belt (3) and the collection trough (16) is funnel-shaped, with the trough fixedly connected to the storage bin (17).

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