Plastic spraying assembly line

Abstract

The utility model discloses a plastic spraying assembly line which comprises a conveying track arranged in a circulating mode, a plurality of hanging tools arranged on the conveying track and moving along the conveying track, a feeding mechanism used for feeding external workpieces to the hanging tools, and preheating equipment, spraying equipment and curing equipment which are sequentially arranged on the conveying track. The feeding mechanism feeds an external workpiece to the hanging tool, the conveying rail drives the external workpiece on the hanging tool to move into the preheating equipment for workpiece preheating treatment, the preheated workpiece is conveyed to the spraying equipment through the conveying rail to be sprayed, and the sprayed workpiece is conveyed to the curing equipment through the conveying rail to be cured. According to the plastic spraying assembly line, through the automatic and efficient design, high quality and high efficiency of workpiece surface treatment are achieved, and the assembly line is suitable for surface spraying treatment of various types of workpieces and has wide application prospects and market value.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic spraying, in particular to a powder spraying production line. Background Art

[0002] The powder spraying production line is a device for surface treatment, mainly used for evenly spraying electrostatic powder coatings on the surface of workpieces and forming a coating through curing. This production line is widely used in the surface treatment of various materials such as metals, plastics, and woods to improve the corrosion resistance, decoration, and wear resistance of products. In the existing powder spraying process, most are carried out manually in a closed powder spraying room. The dust scattered during powder spraying seriously affects the physical and mental health of construction workers, and the scattered dust cannot be processed in time. There is still dust pollution when the door is opened, and a large amount of dust is wasted. Moreover, most of the heat preservation after spraying and curing is not in place, resulting in poor curing effect and low yield of the finished products after spraying. Content of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a powder spraying production line. By setting reverse powder spraying in a double-station powder spraying room, the powdering of workpieces becomes more uniform. By covering a heat preservation chamber on the preheating device and / or the curing device, a stable temperature environment can be provided. After the powder coating is sprayed on the surface of the workpiece, it needs to be cured through a certain temperature and time to form a firm and flat coating. The heat preservation chamber can ensure that the temperature of the workpiece is uniform during the preheating and curing processes, avoiding the influence of temperature fluctuations on the preheating and curing quality.

[0004] To achieve the above purpose, the technical solution adopted by the utility model includes a transportation track, a plurality of hangers arranged on the transportation track and moving along the transportation track, and a loading mechanism for loading external workpieces onto the hangers. It also includes a preheating device, a spraying device, and a curing device arranged in sequence on the transportation track. The loading mechanism loads the external workpiece onto the hanger, and the transportation track drives the external workpiece on the hanger to move into the preheating device for workpiece preheating treatment. The preheated workpiece is transported to the spraying device via the transportation track for spraying, and the sprayed workpiece is transported to the curing device via the transportation track for curing treatment. The circularly arranged transportation track can realize continuous and automated transportation of workpieces, greatly improving production efficiency. The workpiece moves in a circle on the track without waiting or stagnating, reducing time waste in the production process. The loading mechanism can adopt a manipulator, and the manipulator can be equipped with sensors. When the external workpiece is conveyed to the vicinity of the loading mechanism by a conveyor belt or other means, the sensors will detect the presence of the workpiece and trigger corresponding actions. The robotic arm or other actuating mechanisms will grab the workpiece from the conveyor belt according to the preset program and parameters and accurately place it at the designated position on the hanger.

[0005] The described powder coating production line further includes a heat preservation chamber covering the preheating equipment and / or curing equipment. The heat preservation chamber includes a heat preservation inner cavity. One end of the heat preservation inner cavity away from the preheating equipment and / or curing equipment is provided with an opening, and a heat preservation door is provided at the opening. The inner wall material of the heat preservation chamber can adopt aerogel, which is a new type of nano-porous heat preservation material with extremely low thermal conductivity and excellent heat preservation performance. At the same time, it also has good fire prevention, waterproof and sound insulation properties. Through its unique heat preservation inner cavity and heat preservation material, the heat preservation chamber effectively isolates the preheating equipment and / or curing equipment from the external environment, reduces heat dissipation and the influence of external temperature fluctuations on the internal temperature of the equipment. This helps to maintain a stable temperature environment inside the equipment and ensure the uniformity and quality of the powder coating.

[0006] The described loading mechanism includes a loading manipulator and a driving motor for driving the loading manipulator to load. The loading manipulator clamps and loads external workpieces onto the hangers on the transportation track. The fully automatic loading manipulator realizes functions such as automatic grasping, conveying and positioning of workpieces through an integrated control system. It can be seamlessly connected with other links of the powder coating production line, reducing labor costs and improving production efficiency.

[0007] The described preheating equipment includes a preheating furnace and a first heater used in cooperation with the preheating furnace. The first heater includes a first furnace body, a first burner used in cooperation with the first furnace body, and a first fan for transmitting the air heated by the first burner into the preheating furnace. The preheating furnace is the core part of the preheating equipment, and its main function is to heat the workpiece or material to be processed to a certain temperature. Preheating can reduce the temperature difference between the coating and the substrate, remove moisture and activate the surface, which is beneficial to the bonding between the coating and the substrate and improve the adhesion of the coating.

[0008] The described curing equipment includes a curing furnace and a second heater used in cooperation with the curing furnace. The second heater includes a second furnace body, a second burner used in cooperation with the second furnace body, and a second fan for transmitting the air heated by the second burner into the curing furnace. The curing furnace is the main part of the curing equipment. It provides a high-temperature environment, enabling the powder coating sprayed on the surface of the workpiece to undergo a chemical reaction (such as crosslinking curing) at high temperature, thereby forming a hard, wear-resistant and corrosion-resistant coating.

[0009] The spraying equipment is a two-station powder spraying booth. The spraying equipment includes a powder spraying box body, two powder spraying machines with opposite powder spraying directions installed on the powder spraying box body, and a powder recovery device used in conjunction with the powder spraying box body. There are two powder spraying machines installed in the powder spraying booth, and their powder spraying directions are opposite. This design enables the workpiece to receive spraying from two directions simultaneously or alternately when passing through the powder spraying booth, improving the uniformity and efficiency of spraying. The powder recovery device includes a recovery box, a filtering device, and a suction fan. An air inlet is provided on one side of the recovery box. The suction fan installed on the recovery box is connected to the powder spraying booth to suck the excess powder in the powder spraying booth for secondary recovery. The filtering device filters the powder recovered for the second time, saving resources and allowing it to be reused in production for the second time.

[0010] The heat preservation door can be an air curtain heat insulation door, which isolates the hot air inside the preheating equipment and / or curing equipment from the air outside the preheating equipment and / or curing equipment. The air curtain heat insulation door is equipped with a fan and multiple air nozzles inside. When the door needs to be closed, the fan starts and blows a high-speed air flow to form a dense air curtain. This air curtain can block the intrusion of external cold air and the loss of internal hot air, thereby maintaining the stability of the internal environment of the equipment. At the same time, the air curtain can also effectively prevent dust, particles and other impurities from entering the equipment, ensuring the quality of powder spraying on the powder spraying production line.

[0011] An air filter plate is provided between the first furnace body and / or the second furnace body and the preheating furnace and / or the curing furnace. The air in the furnace body extracted by the first fan and the second fan is filtered by the air filter plate and then input into the preheating furnace and / or the curing furnace. The first fan and the second fan are respectively responsible for extracting air from the first furnace body and the second furnace body. This air may contain particles, steam, smoke or other impurities generated during the heating or treatment process; the air filter plate is composed of multiple layers of filter meshes with different pore sizes and materials, which can effectively block and remove impurities and particles in the air. The air becomes cleaner after being filtered by the air filter plate and is suitable for reuse; the filtered clean air is blown into the preheating furnace and / or the curing furnace by the fan for reuse. These clean air helps to maintain the stability of the furnace temperature and reduce maintenance problems caused by the accumulation of impurities.

[0012] Opening and closing doors are provided on both sides of the spraying equipment that are far away from each other. The transportation track extends along the opening direction of the opening and closing doors on both sides of the spraying equipment. The transportation track is in the same direction as the opening direction of the opening and closing doors of the spraying equipment, enabling the workpiece to move smoothly along the track when entering and leaving the spraying equipment, reducing the transfer time and labor cost. It is an efficient, convenient and flexible production method, which helps to improve production efficiency and product quality.

[0013] The spraying device further includes an electrostatic generating component used in conjunction with the powder spraying box body. The electrostatic generating component enables the powder coating in the powder spraying box body to carry static electricity and adsorb onto the workpiece pre-treated by the preheating device, making the powder more evenly adsorbed onto the external workpiece.

[0014] It also includes a control system. The control system is arranged on the transportation track and is connected to the feeding mechanism, preheating device, spraying device, and curing device. Through preset programs and algorithms, the control system can automate the entire process of workpiece feeding, preheating, spraying, curing, etc., reduce manual intervention, improve production efficiency and product consistency, and ensure the efficient, stable, and reliable operation of the entire production process.

[0015] The beneficial effects of the present utility model: The double-station powder spraying booth design is adopted, where the powder spraying directions of the two stations are opposite, significantly improving the powder spraying efficiency and the uniformity of the coating. In addition, by installing a heat preservation chamber on the preheating device and / or curing device, a stable temperature control environment can be created. When the powder coating is sprayed onto the surface of the workpiece, this coating needs to undergo specific temperature and time conditions for curing to ensure the formation of a final strong and flat coating. The key role of the heat preservation chamber is that it can ensure that the workpiece is affected by a uniform and stable temperature during the preheating and curing processes, effectively preventing the adverse effects that temperature fluctuations may bring to the preheating effect and curing quality, thereby improving the overall quality and performance of the coating. Description of the Drawings

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 is a structural schematic diagram of the feeding mechanism of the present utility model;

[0018] Figure 3 is a structural schematic diagram of the preheating furnace and curing furnace of the present utility model;

[0019] Figure 4 is a structural schematic diagram of the spraying device of the present utility model.

[0020] The reference numerals include:

[0021] 1. Transportation track; 2. Loading mechanism; 3. Preheating equipment; 4. Spraying equipment; 5. Curing equipment; 6. Insulation chamber; 7. Insulation inner cavity; 8. Insulation door; 9. Loading manipulator; 10. Driving motor; 11. Preheating furnace; 12. First heater; 13. First furnace body; 14. First burner; 15. First blower; 16. Curing furnace; 17. Second heater; 18. Second furnace body; 19. Second burner; 20. Second blower; 21. Powder spraying box body; 22. Powder spraying machine; 23. Powder recovery equipment; 24. Air filter plate; 25. Opening and closing door; 26. Electrostatic generating assembly. Detailed implementation manners

[0022] For further illustration, the content mentioned in the implementation manners does not limit the present utility model.

[0023] Please refer to Figures 1 to 4 As shown, a powder spraying production line of the present utility model includes a circulating transportation track 1, a plurality of hangers arranged on the transportation track 1 and moving along the transportation track 1, and a loading mechanism 2 for loading external workpieces onto the hangers. It also includes a preheating equipment 3, a spraying equipment 4, and a curing equipment 5 arranged in sequence on the transportation track 1. The loading mechanism 2 loads the external workpieces onto the hangers, the transportation track 1 drives the external workpieces on the hangers to move into the preheating equipment 3 for workpiece preheating treatment, the preheated workpieces are transported to the spraying equipment 4 by the transportation track 1 for spraying, and the sprayed workpieces are transported to the curing equipment 5 by the transportation track 1 for curing treatment. The powder spraying production line adopts a circular transportation track 1 made of wear-resistant and high-temperature-resistant alloy steel to ensure long-term stable operation. A plurality of hangers are arranged on the track, and the hangers are made of stainless steel, with sufficient load-bearing capacity and stability for hanging the workpieces to be processed.

[0024] The circulating transportation track 1 can realize continuous and automated transportation of workpieces, greatly improving production efficiency. The workpieces move in a cycle on the track without waiting or stagnating, reducing time waste in the production process. The loading mechanism 2 is located at the starting end of the transportation track 1. The loading mechanism 2 can adopt a manipulator, and the manipulator can be equipped with sensors. When an external workpiece is conveyed to the vicinity of the loading mechanism 2 by a conveyor belt or other means, the sensors will detect the presence of the workpiece and trigger corresponding actions. The manipulator or other actuators will grab the workpiece from the conveyor belt according to the preset program and parameters and accurately place it at the designated position on the hanger.

[0025] The described powder coating production line further includes a heat preservation chamber 6 covering the preheating device 3 and / or the curing device 5. The heat preservation chamber 6 includes a heat preservation inner cavity 7. One end of the heat preservation inner cavity 7 away from the preheating device 3 and / or the curing device 5 is provided with an opening, and a heat preservation door 8 is provided at the opening. The inner wall material of the heat preservation chamber 6 can adopt aerogel, which is a new type of nano-porous heat preservation material with an extremely low thermal conductivity and excellent heat preservation performance. At the same time, it also has good fire prevention, waterproof and sound insulation properties. Through its unique heat preservation inner cavity 7 and heat preservation material, the heat preservation chamber 6 effectively isolates the preheating device 3 and / or the curing device 5 from the external environment, reducing heat loss and the influence of external temperature fluctuations on the internal temperature of the device. During the process of transporting the external workpieces after preheating or curing to outside the heat preservation chamber 6 via the transport track 1, heat loss can be reduced and the temperature can be maintained, which helps to maintain a stable temperature environment inside the device and ensure the uniformity and quality of the powder coating.

[0026] The described loading mechanism 2 includes a loading manipulator 9 and a driving motor 10 for driving the loading manipulator 9 to load. The loading manipulator 9 clamps and loads external workpieces onto the hangers on the transport track 1. The fully automatic loading manipulator 9 realizes functions such as automatic grasping, conveying and positioning of workpieces through an integrated control system. The fully automatic loading manipulator 9 identifies and locates external workpieces through external sensors or machine vision systems to determine their accurate positions and postures. The loading manipulator 9 automatically moves above the workpiece according to the recognition result, firmly clamps the workpiece through the end effector, the driving motor 10 starts to drive the loading manipulator 9 to convey the workpiece to the designated position on the transport track 1, and places it on the hanger through precise positioning technology. It can be seamlessly connected with other links of the powder coating production line, reducing labor costs and improving production efficiency.

[0027] The described preheating device 3 includes a preheating furnace 11 and a first heater 12 used in cooperation with the preheating furnace 11. The first heater 12 includes a first furnace body 13, a first burner 14 used in cooperation with the first furnace body 13, and a first blower 15 for transmitting the air heated by the first burner 14 into the preheating furnace 11. First, start the first burner 14 to generate high-temperature flames or hot air. Subsequently, the first blower 15 blows the high-temperature air or hot air into the preheating furnace 11 to heat the workpieces placed in the furnace. By controlling the firepower of the burner and the air volume of the blower, the temperature and time in the preheating furnace 11 can be precisely adjusted to meet the preheating requirements of different workpieces and coatings. The preheating furnace 11 is the core part of the preheating device 3, and its main function is to heat the workpieces or materials to be processed to a certain temperature. Preheating can reduce the temperature difference between the coating and the substrate, remove moisture and activate the surface, which is beneficial to the bonding between the coating and the substrate and improve the adhesion of the coating.

[0028] The curing equipment 5 includes a curing furnace 16 and a second heater 17 used in conjunction with the curing furnace 16. The second heater 17 includes a second furnace body 18, a second burner 19 used in conjunction with the second furnace body 18, and a second blower 20 that transports the air heated by the second burner 19 into the hanging curing furnace 16. During the curing process, the second burner 19 is started and ignited to generate high-temperature flames or hot air. The second blower 20 sends this hot air or hot gas into the curing furnace 16 through a pipeline to heat the workpiece sprayed with powder coating. As the temperature rises and time passes, the powder coating gradually undergoes a chemical reaction and cures into a hard coating. The curing furnace 16 is the main part of the curing equipment 5, which provides a high-temperature environment for the powder coating sprayed on the surface of the workpiece to undergo a chemical reaction (such as crosslinking curing) at high temperature, thereby forming a hard, wear-resistant, and corrosion-resistant coating.

[0029] The spraying equipment 4 is a two-station powder spraying booth. The spraying equipment includes a powder spraying box body 21, two powder spraying machines 22 with opposite spraying directions installed on the powder spraying box body 21, and a plurality of powder recovery devices 23 installed beside the two powder spraying machines 22. The external workpiece is transported into the spraying equipment 4 through the transportation track 1. The powder spraying machine 22 and the powder recovery system are started, and the powder coating is evenly sprayed on the surface of the workpiece through the principle of electrostatic adsorption. After powder spraying, the excess powder in the powder spraying booth is sucked into the powder recovery device 23 by the suction fan for secondary utilization.

[0030] There are two powder spraying machines 22 installed in the powder spraying booth, and their spraying directions are opposite. This design enables the workpiece to receive spraying from two directions simultaneously or alternately when passing through the powder spraying booth, improving the uniformity and efficiency of spraying. The powder recovery device 23 includes a recovery box, a filtering device, and a suction fan. One side of the recovery box is provided with an air inlet. The suction fan installed on the recovery box is connected to the powder spraying booth to suck the excess powder in the powder spraying booth for secondary recovery. The filtering device filters the powder recovered for the second time, saving resources and enabling it to be put into production for secondary use.

[0031] The heat preservation door 8 can be an air curtain heat insulation door, which isolates the hot air inside the preheating equipment 3 and / or the curing equipment 5 from the air outside the preheating equipment 3 and / or the curing equipment 5. The air curtain heat insulation door is equipped with a blower and a plurality of air nozzles inside. When the door body needs to be closed, the blower is started to blow a high-speed air flow to form a dense air curtain. This air curtain can block the intrusion of external cold air and the loss of internal hot air, thereby maintaining the stability of the internal environment of the equipment. At the same time, the air curtain can also effectively prevent dust, particles and other impurities from entering the equipment, ensuring the spraying quality of the powder coating production line.

[0032] An air filter plate 24 is provided between the first furnace body 13 and / or the second furnace body 18 and the preheating furnace 11 and / or the curing furnace 16. The air in the furnace bodies extracted by the first blower 15 and the second blower 20 is filtered by the air filter plate 24 and then input into the preheating furnace 11 and / or the curing furnace 16. The first blower 15 and the second blower 20 are respectively responsible for extracting air from the first furnace body 13 and the second furnace body 18. This air may contain particles, vapors, fumes or other impurities generated during the heating or processing; the air filter plate 24 is composed of multiple layers of filter meshes with different pore sizes and materials, which can effectively block and remove impurities and particles in the air. The air filtered by the air filter plate 24 becomes cleaner and is suitable for reuse; the filtered clean air is blown into the preheating furnace 11 and / or the curing furnace 16 by the blower for reuse. These clean air helps to maintain the stability of the furnace temperature and reduce maintenance problems caused by the accumulation of impurities. During the filtering process, the multiple layers of filter meshes gradually remove impurities such as particles and fumes in the air, making the air cleaner; the filtered clean air is then blown into the preheating furnace 11 and / or the curing furnace 16 by the blower.

[0033] Both sides of the spraying device 4 that are far away from each other are provided with opening and closing doors 25, and the transportation track 1 extends along the opening direction of the opening and closing doors 25 on both sides of the spraying device. When an external workpiece enters the spraying device 4 for spraying or after being sprayed by the spraying device 4, the opening and closing doors 25 on both sides of the spraying device 4 will automatically open or close. The transportation track 1 is in the same direction as the opening direction of the opening and closing doors 25 of the spraying device 4, so that the workpiece can move smoothly along the track when entering and leaving the spraying device 4, reducing the transfer time and labor costs. It is an efficient, convenient and flexible production method, which helps to improve production efficiency and product quality.

[0034] The spraying device 4 further includes an electrostatic generating component 26 used in cooperation with the powder spraying box body 21. The electrostatic generating component 26 makes the powder coating in the powder spraying box body 21 carry static electricity to adsorb on the workpiece pre-treated by the preheating device 3, so that the powder is adsorbed on the external workpiece more evenly.

[0035] The remaining parts of this embodiment are the same as those of the first embodiment. For the features not explained in this embodiment, the explanations of the first embodiment are adopted and will not be elaborated here.

[0036] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A plastic spraying production line, comprising a transport track (1), a plurality of hangers arranged on the transport track (1) and moving along the transport track (1), and a loading mechanism (2) for loading external workpieces onto the hangers, characterized in that: The invention also comprises a preheating device (3), a spraying device (4) and a curing device (5) which are arranged in sequence on a transport track (1); the feeding mechanism (2) feeds an external workpiece onto a hanger; the transport track (1) drives the external workpiece on the hanger to move into the preheating device (3) for preheating of the workpiece; the workpiece after preheating is transported to the spraying device (4) via the transport track (1) for spraying; the workpiece after spraying is transported to the curing device (5) via the transport track (1) for curing; the spraying device (4) is a double-station powder spraying room; the spraying device (4) comprises a powder spraying box (21), two powder sprayers (22) installed on the powder spraying box (21) and having opposite powder spraying directions, and a powder recovery device (23) used in conjunction with the powder spraying box (21).

2. A plastic spraying line according to claim 1, characterized in that: The plastic spraying production line further comprises an insulation chamber (6) which is arranged on the preheating device (3) and / or the curing device (5), the insulation chamber (6) comprising an insulation inner cavity (7), an opening being arranged at one end of the insulation inner cavity (7) away from the preheating device (3) and / or the curing device (5), and an insulation door (8) being arranged at the opening.

3. A plastic spraying line according to claim 1, characterized in that: The feeding mechanism (2) comprises a feeding robot (9) and a driving motor (10) for driving the feeding robot (9) to feed materials. The feeding robot (9) clamps and feeds external workpieces onto a hanger on the transport track (1).

4. A plastic spraying line according to claim 1, characterized in that: The preheating device (3) comprises a preheating furnace (11), a first heater (12) used in conjunction with the preheating furnace (11), the first heater (12) comprising a first furnace body (13), a first burner (14) used in conjunction with the first furnace body (13), and a first fan (15) for transmitting air heated by the first burner (14) to the preheating furnace (11).

5. The plastic spraying line according to claim 1, characterized in that: The curing device (5) comprises a curing furnace (16), a second heater (17) used in conjunction with the curing furnace (16), the second heater (17) comprising a second furnace body (18), a second burner (19) used in conjunction with the second furnace body (18), and a second fan (20) for transmitting air heated by the second burner (19) to the hanging curing furnace (16).

6. A plastic spraying line according to claim 2, characterized in that: The heat-insulating door (8) is an air curtain heat-insulating door, which isolates the hot air in the preheating device (3) and / or the curing device (5) from the air outside the preheating device (3) and / or the curing device (5).

7. A plastic spraying line according to claim 4 or 5, characterized in that: An air filter plate (24) is provided between the furnace body and the preheating furnace (11) or the curing furnace (16); the air in the furnace body extracted by the fan is filtered through the air filter plate (24) and then input into the preheating furnace (11) or the curing furnace (16).

8. The plastic spraying line according to claim 1, characterized in that: The spraying equipment (4) is provided with opening and closing doors (25) on two sides away from each other, and the transport track (1) is arranged to extend along the openings of the opening and closing doors (25) on both sides of the spraying equipment (4).

9. A plastic spraying production line according to claim 6, characterized in that: The spraying equipment (4) also includes an electrostatic generating component (26) used in conjunction with the powder spraying box (21), wherein the electrostatic generating component (26) enables the powder coating in the powder spraying box (21) to carry static electricity so as to be adsorbed on the workpiece preheated by the preheating equipment (3).

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