Casting powder spraying line

Abstract

The utility model relates to the technical field of powder spraying, in particular to a casting powder spraying line which comprises a conveying track, a suspension frame arranged on the conveying track and moving along with the conveying track and a driving device driving the suspension frame to move along the conveying track. The pretreatment equipment, the preheating treatment equipment, the powder spraying chamber, the curing treatment equipment and the cooling equipment are sequentially arranged in the length direction of the conveying track, the suspension frame is used for bearing an external powder spraying part, and the external powder spraying part enters the pretreatment equipment through the conveying track to be subjected to surface cleaning treatment; the cleaned workpiece flows into preheating treatment equipment for preheating treatment, the preheated workpiece enters a powder spraying chamber for spraying treatment, the sprayed workpiece flows into curing treatment equipment for high-temperature curing, and the workpiece is cooled through cooling equipment after being cured; automatic conveying and a coherent technological process are beneficial to reducing manual operation participation, improving production efficiency and ensuring technological quality.

Description

Technical Field

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

[0002] With the continuous development of industrial production, the requirements for product protection, decoration and functionality are getting higher and higher. Traditional painting methods, such as spray painting, have problems such as high emissions of volatile organic compounds (VOCs), low paint utilization rate, and unstable coating quality. In this context, powder spraying technology has gradually emerged. Powder coatings have the advantages of being solvent-free, environmentally friendly, high utilization rate, and excellent coating performance. From an environmental perspective, powder coatings do not contain solvents, greatly reducing the emissions of VOCs and meeting the requirements of increasingly strict environmental protection regulations.

[0003] Economically, the higher paint utilization rate reduces production costs. Moreover, powder coatings can form thicker coatings, have good corrosion resistance, wear resistance and weather resistance, and can meet the use requirements in various harsh environments. The progress of technology has also provided support for the development of powder spraying treatment. For example, the continuous improvement of electrostatic spraying technology has improved the powder adhesion rate and the uniformity of the coating. However, the existing powder spraying production lines for castings still lack automated conveying and a coherent production process. Summary of the Utility Model

[0004] In order to overcome the shortcomings and deficiencies existing in the prior art, the purpose of the utility model is to provide a powder spraying line for castings. The powder spraying production process for castings drives the conveying track through a driving device to achieve automated conveying and a coherent process, which is beneficial to reducing the participation of manual operations, improving production efficiency, and ensuring process quality.

[0005] To achieve the above object, a casting powder spraying line of the present utility model includes a conveying track, a hanging rack disposed on the conveying track and moving along with the conveying track, and a driving device for driving the hanging rack to move along the conveying track; it further includes a pretreatment device, a preheating treatment device, a powder spraying chamber, a curing treatment device, and a cooling device arranged in sequence along the length direction of the conveying track. The hanging rack is used to carry external powder spraying parts. The external powder spraying parts enter the pretreatment device through the conveying track for surface cleaning treatment. After the cleaning is completed, the workpiece flows into the preheating treatment device for preheating treatment. After the preheating treatment is completed, the workpiece enters the powder spraying chamber for spraying treatment. After the spraying is completed, the workpiece flows into the curing treatment device for high-temperature curing. After the workpiece is cured, it is cooled down through the cooling device. Through the cooperation of the conveying track and the driving device, the conveying track can circulate the external powder spraying parts in the sequentially connected pretreatment device, preheating treatment device, powder spraying chamber, curing treatment device, and cooling device, ensuring the precise control and execution of each process link. The pretreatment device performs surface cleaning treatment, providing a good foundation for the subsequent coating adhesion; the preheating treatment can improve the adhesion of the powder and the uniformity of the coating; the curing treatment makes the coating solidify and form, enhancing its performance; the cooling device ensures the stable state of the workpiece and shortens the production cycle. The orderly connection of each link effectively improves the quality and stability of the coating. The automated conveying and coherent process reduce the participation of manual operations, improve production efficiency, and ensure the process quality.

[0006] Furthermore, the powder spraying chamber is arranged in a large cyclone isolation room. An isolation cover is provided on the outer surface of the powder spraying chamber. The large cyclone isolation room includes a cyclone separation device. The cyclone separation device is provided with a pipeline with one end connected to the isolation cover, and the cyclone separation device is connected to the isolation cover through the pipeline. By setting the large cyclone isolation room, a large amount of powder coatings generated during the powder spraying process can be effectively separated and recycled, improving the utilization rate of the coatings and reducing production costs. By isolating the dust in a specific area and effectively collecting and treating it, the dust flying in the workplace can be greatly reduced, protecting the health of workers and reducing the risk of occupational diseases. Reducing the dust concentration can reduce the risk of dust explosion and improve the safety of the production process. It has the advantages of efficient dust recovery, improved working environment, and enhanced production safety.

[0007] Furthermore, the powder spraying room is provided with a powder spraying window, and the powder spraying room is equipped with a plurality of powder spraying guns corresponding to the powder spraying windows, and external operators and / or machines spray the external powder spraying parts in the powder spraying room via the powder spraying guns. Manual operation can be flexibly adjusted according to the complex shape and special parts of the workpiece to ensure that the coating evenly covers the hard-to-reach corners and details; or when encountering workpieces with flaws or uneven surfaces, manual operation can quickly judge and adopt corresponding spraying strategies to ensure the quality of the coating. The machine can perform spraying operations quickly and continuously, which is particularly suitable for large-scale and batch production. For workpieces of the same model and specification, the machine can always maintain the same spraying effect. Manual spraying has the advantages of high flexibility and the ability to cope with special situations, and machine spraying has the advantages of high efficiency and good repeatability.

[0008] Furthermore, the conveying track is also provided with a wheel mechanism, which has an outer wheel arranged at the edge of the wheel mechanism and a rotating shaft arranged at the center of the wheel mechanism, the outer wheel is connected to the conveying track in a rolling manner, and the rotating shaft is fixedly arranged on the external bearing plane. By providing the wheel mechanism, the conveying track changes its movement direction through the relative rotation connection with the outer wheel, so that the travel path of the conveying track can make full use of space, which is conducive to saving space and thus reducing costs. In addition, in the conveying path of the long conveying track, the wheel mechanism can also be used as an intermediate carrier, so that the conveying track is more stable during operation, reduces jitter and shaking, and ensures the stability and safety of the workpiece during the conveying process.

[0009] Furthermore, the driving device includes a driving motor, a driven mechanism and a connecting mechanism, the driving motor is provided with a first rotating shaft, the driven mechanism is provided with a second rotating shaft, the first rotating shaft and the second rotating shaft are connected in rotation by means of an external belt, the driven mechanism is further provided with a third rotating wheel driven by the second rotating shaft, the connecting mechanism is provided with a fourth rotating wheel, the third rotating shaft and the fourth rotating wheel are connected in rotation by means of an external rack. The second rotating shaft and the third rotating wheel are driven by a worm gear structure, and through the meshing of the worm and the worm wheel, the transmission input high-speed and low-torque power of the first rotating shaft and the second rotating shaft can be converted into output low-speed and high-torque power through the worm gear structure meshing with the second rotating shaft, thereby meeting the power output requirements of the conveying track.

[0010] Furthermore, the connecting mechanism also has a connecting member, one end of which is fixedly connected to the fourth rotating wheel, and the other end of which is rotatably connected to the conveying track.

[0011] Furthermore, the preheating treatment device includes a preheating housing and a first heating device. A preheating inner cavity is provided inside the preheating housing. The first heating device includes a first heater, a first blower, and a first heating matrix with two ends respectively connected to the first heater and the first blower. The first heating matrix is provided with a first inner cavity. The first heater heats the gas stored in the first inner cavity, and the first blower sucks gas from the preheating inner cavity into the first inner cavity and / or the first blower discharges gas from the first inner cavity into the preheating inner cavity. By providing the first heating device, the external powder spraying parts passing through the preheating treatment device can be preheated in a timely and effective manner.

[0012] Furthermore, the curing treatment device includes a curing housing. A curing inner cavity is provided inside the curing housing. The curing inner cavity is connected to the first inner cavity through the first blower. The first heater heats the gas stored in the first inner cavity, and the first blower sucks gas from the curing inner cavity into the first inner cavity and / or the first blower discharges gas from the first inner cavity into the curing inner cavity. By providing the second heating device, the external powder spraying parts passing through the curing treatment device can be cured in a timely and effective manner.

[0013] Furthermore, the first blower is provided with a first filter screen. The first filter screen is provided with a plurality of holes and has a hollow structure. The first filter screen is used to filter dust and / or solid particles in the gas. By providing the first filter screen, secondary pollution to the external powder spraying parts can be effectively avoided, ensuring the quality of the final product.

[0014] Furthermore, the cooling device includes a cooling fan and a cooling housing. A cooling inner cavity is provided inside the cooling housing. The cooling fan blows out low-temperature gas to cool the external powder spraying parts in the cooling inner cavity. By providing the cooling device, rapid cooling of the external powder spraying parts can be achieved, which is beneficial to shortening the production cycle and improving production efficiency.

[0015] The beneficial effects of the present utility model: A casting powder spraying line of the present utility model drives the conveying track through a driving device, so that the external powder spraying parts move between the pretreatment device, the preheating treatment device, the powder spraying chamber, the curing treatment device, and the cooling device connected in sequence. The automated conveying and coherent process are beneficial to reducing the participation of manual operations, improving production efficiency, and ensuring process quality.

[0016] By providing a large cyclone isolation chamber, the dust is isolated in a specific area and effectively collected and treated, which can greatly reduce the dust flying in the workplace, protect the health of workers, and reduce the risk of occupational diseases. Reducing the dust concentration can reduce the risk of dust explosion and improve the safety of the production process. It has the advantages of efficient dust recovery, improved working environment, and enhanced production safety.

[0017] By setting up the wheel mechanism, the conveyor track changes its movement direction through the relative rotation connection with the outer wheel, so that the travel path of the conveyor track can fully utilize the space, which is conducive to saving space and thus reducing costs. In addition, in the long conveying path of the conveyor track, the wheel mechanism can also be used as an intermediate carrier, making the conveyor track more stable during operation, reducing jitter and shaking, and ensuring the stability and safety of the workpiece during the conveying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the process of the utility model;

[0019] Figure 2 This is a schematic structural diagram of a large cyclone separation chamber of the utility model;

[0020] Figure 3 It is a schematic diagram of the first partial structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the driving device of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the first heating device of the utility model;

[0023] Figure 6 This is a schematic diagram of the cooling device structure of the utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the wheel mechanism of the utility model;

[0025] Figure 8 for Figure 5 The structural diagram at A in the middle;

[0026] Reference numerals include:

[0027] 1. Pretreatment equipment; 2. Preheating treatment equipment; 3. Powder spraying chamber; 4. Curing treatment equipment; 5. Cooling equipment; 6. Workpiece loading area; 7. Workpiece unloading area; 8. Large cyclone isolation chamber; 9. First heating device; 10. Driving device; 11. Runner mechanism; 100. Conveyor track; 101. Suspension rack; 102. Driving motor; 103. Driven mechanism; 104. First rotating shaft; 105. Second rotating shaft; 106. Third runner; 107. Fourth runner; 108. Connector; 109. Connecting mechanism; 201. Preheating outer shell; 202. Preheating inner cavity; 301. Isolation cover; 302. First working area; 303. Second working area; 306. Powder spraying gun; 307. Powder spraying window; 401. Curing outer shell; 402. Curing inner cavity; 501. Cooling fan; 502. Cooling outer shell; 503. Cooling inner cavity; 801. Cyclone separation device; 802. Pipeline; 901. First heater; 902. First heating matrix; 903. First blower; 904. First inner cavity; 905. First filter screen; 906. Hole; 111. Outer wheel; 112. Rotating shaft. Detailed implementation mode

[0028] For the convenience of understanding by those skilled in the art, the present invention will be further described below in conjunction with embodiments and drawings. The content mentioned in the implementation mode does not limit the present invention.

[0029] Please refer to Figures 1 to 8 As shown in the figure, a casting powder spraying line of the present invention includes a conveyor track 100, a driving device 10 for driving the conveyor track 100 to move, and a suspension rack 101 arranged on the conveyor track 100 and moving with the conveyor track 100; it also includes a pretreatment equipment 1, a preheating treatment equipment 2, a powder spraying chamber 3, a curing treatment equipment 4, and a cooling equipment 5 connected in sequence through the conveyor track 100. The suspension rack 101 suspends an external powder spraying part on the conveyor track 100. The external powder spraying part enters the pretreatment equipment 1 through the conveyor track 100 for surface cleaning treatment. After the cleaning is completed, the workpiece flows into the preheating treatment equipment 2 for preheating treatment. After the preheating treatment is completed, the workpiece enters the powder spraying chamber 3 for spraying treatment. After the spraying is completed, the workpiece flows into the curing treatment equipment for high-temperature curing. After the workpiece is cured, it is cooled down through the cooling equipment 5.

[0030] Through the cooperation of the conveying track 100 and the driving device 10, the conveying track 100 can circulate the external powder spraying parts in the pre-treatment equipment 1, preheating treatment equipment 2, powder spraying chamber 3, curing treatment equipment 4 and cooling equipment 5 connected in sequence, ensuring the precise control and execution of each process link. The pre-treatment equipment 1 performs surface cleaning treatment to provide a good foundation for subsequent coating adhesion; the preheating treatment can improve the adhesion of the powder and the uniformity of the coating; the curing treatment makes the coating cured and formed, enhancing its performance; the cooling equipment 5 ensures the stable state of the workpiece and shortens the production cycle. The orderly connection of each link effectively improves the quality and stability of the coating. The automated conveying and coherent process reduce the participation of manual operations, improve production efficiency and ensure process quality.

[0031] In this embodiment, there are also a workpiece loading area 6 and a workpiece unloading area 7. The workpiece loading area 6 is the area where manual work or / and machines install and fix the external powder spraying parts on the hanging rack 101; the workpiece unloading area 7 is the area where manual work or / and machines disassemble the finished workpieces from the hanging rack 101. The workpiece loading area 6 is connected to the pre-treatment equipment 1 through the conveying track 100. In the production process, the workpiece loading step is before the pre-treatment step; the workpiece unloading area 7 is connected to the cooling equipment 5 through the conveying track 100 and is also connected to the workpiece loading area 6 through the conveying track 100. In the production process, the workpiece unloading step is after the cooling step. After the workpiece unloading is completed, the hanging rack 101 returns to the workpiece loading area 6 following the conveying track 100. The workpiece unloading area 7 also has a manual inspection area for products. The manual inspection area for products is the area where manual work inspects the external powder spraying parts flowing out of the cooling equipment 5. The qualified products are disassembled from the hanging rack 101 through manual work and / or machines. The unqualified products flow into the workpiece unloading area 7 along the conveying track 100 and then go through the powder spraying process again.

[0032] Specifically, the powder spraying chamber 3 is arranged in the large cyclone isolation room 8. An isolation cover 301 is arranged on the outer surface of the powder spraying chamber 3. The large cyclone isolation room 8 includes a cyclone separation device 801. The cyclone separation device 801 is provided with a pipeline 802 connected to one end of the isolation cover 301. The cyclone separation device 801 communicates with the air inside the isolation cover 301 through the pipeline 802. In this embodiment, the cyclone separation device 801 includes a cyclone separator and a filtration system. The cyclone separator can separate the powder particles in the air from the gas by using centrifugal force. For example, the heavier powder particles are thrown towards the wall surface and fall into the collection device through the high-speed rotating airflow. The filtration system can be used to further filter the air for fine powder particles and ensure that the discharged air meets the environmental protection standards. For example, by using a HEPA filter, particles with a smaller diameter can be captured.

[0033] During actual use, powder spraying treatment is performed on external powder spraying parts in the powder spraying chamber 3. A large number of powder particles are free in the air. At this time, the cyclone separation device 801 can be turned on. The cyclone separation device 801 processes the air in the powder spraying chamber 3 through the pipeline 802, separates and recovers the powder particles from the gas for reuse, and outputs air that meets environmental protection standards.

[0034] By setting up the large cyclone isolation chamber 8, a large amount of powder coating generated during the powder spraying process can be effectively separated and recovered, improving the utilization rate of the coating and reducing production costs. By isolating the dust in a specific area and effectively collecting and treating it, the dust flying in the workplace can be greatly reduced, protecting the health of workers and reducing the risk of occupational diseases. Reducing the dust concentration can also reduce the risk of dust explosion and improve the safety of the production process. It has the advantages of efficient dust recovery, improved working environment, and enhanced production safety.

[0035] Specifically, the powder spraying chamber 3 is provided with a powder spraying window 302. The powder spraying chamber 3 is configured with a plurality of powder spraying guns 301 corresponding to the powder spraying window 302. External operators and / or machines spray the external powder spraying parts in the powder spraying chamber 3 via the powder spraying guns 301. In this embodiment, the powder spraying chamber 3 is provided with a first working area 302 and a second working area 303. The first working area 302 and the second working area 303 are arranged opposite to each other. The conveying track 100 is located between the first working area 302 and the second working area 303. Both the first working area 302 and the second working area 303 are provided with a plurality of powder spraying windows 302. The machine is located in the middle of the working area, and the external operator is located on one side of the machine. During actual production and manufacturing, the machines located in the first working area 302 and the second working area 303 spray the external powder spraying parts with simple structures or / and flat planes that face them directly. The external staff then spray the corners and details that are difficult for the machine to evenly cover. For example, for castings with complex curved surfaces and concave structures, manual operation can more precisely control the angle and distance of the spray gun, thereby achieving a better spraying effect.

[0036] When external staff encounter workpieces with surface defects or unevenness, they can quickly judge and adopt corresponding spraying strategies to ensure the coating quality. The machine can perform spraying operations quickly and continuously, especially suitable for large-scale and batch production situations. For workpieces of the same model and specification, the machine can always maintain the same spraying effect. Therefore, setting up a spraying operation environment with coexistence of humans and machines has the advantages of high flexibility, strong compatibility, high efficiency, and repeatability.

[0037] Specifically, the conveying track 100 is also provided with a wheel mechanism 11, which has an outer wheel 111 arranged at the edge of the wheel mechanism 11, and a rotating shaft 112 arranged at the center of the wheel mechanism 11. The outer wheel 111 is rotatably connected to the conveying track 100, and the rotating shaft 112 is fixedly arranged on the external bearing plane. In this embodiment, the casting powder spraying production line combines different production processes compactly in the same space through reasonable partitioning and functional integration. Since it is not a traditional streamlined arrangement, the wheel mechanism 11 is required to adjust the moving direction of the conveying track 100. There are multiple wheel mechanisms 11, and multiple wheel mechanisms 11 are used to adjust the moving direction of the conveying track 100 between process steps, and are also used to adjust the moving direction of the conveying track 100 in the same process step. For example, in the preheating treatment and curing treatment process, the external powder spraying parts need to move one or more back and forth in the preheating inner cavity 202 and the curing inner cavity 402 to achieve a better treatment effect for the external powder spraying parts.

[0038] By providing the wheel mechanism 11, the conveying track 100 changes the direction of movement through the relative rotation connection with the outer wheel 111, so that the travel path of the conveying track 100 can fully utilize the space, which is conducive to saving space and thus reducing costs. In addition, in the long conveying path of the conveying track 100, the wheel mechanism 11 can also be used as an intermediate carrier, so that the conveying track 100 is more stable during operation, reducing jitter and shaking, and ensuring the stability and safety of the workpiece during the conveying process.

[0039] Specifically, the driving device 10 includes a driving motor 102, a driven mechanism 103 and a connecting mechanism 109. The driving motor 102 is provided with a first rotating shaft 104, the driven mechanism 103 is provided with a second rotating shaft 105, the first rotating shaft 104 and the second rotating shaft 105 are rotationally connected by an external belt, the driven mechanism 103 is also provided with a third rotating wheel 106 driven by the second rotating shaft 105, and the connecting mechanism 109 is provided with a fourth rotating wheel 107, and the third rotating wheel 106 and the fourth rotating wheel 107 are rotationally connected by an external rack. In this embodiment, the second rotating shaft 105 is a worm structure, and the driven mechanism 103 has a worm gear mechanism meshing with the second rotating shaft 112. The other end of the third rotating wheel 106 is fixedly connected to the worm gear mechanism. The second rotating shaft 105 and the third rotating wheel 106 are transmitted through the worm gear structure. Through the meshing of the worm and the worm wheel, the transmission input high-speed and low-torque power of the first rotating shaft 104 and the second rotating shaft 105 can be converted into output low-speed and high-torque power through the worm gear structure meshing with the second rotating shaft 105, thereby meeting the power output requirements of the conveying track 100.

[0040] Specifically, the connecting mechanism 109 further includes a connecting member 108. One end of the connecting member 108 is fixedly connected to the fourth runner 107, and the other end of the connecting member 108 is rotatably connected to the conveying track 100. In this embodiment, the connecting member 108 is a gear structure, and the conveying track 100 is provided with a rack structure meshing with the connecting member 108. During actual use, the fourth runner 107 generates power with low speed and high torque through the transmission of the third rotating shaft, so that the connecting member 108 is rotatably connected to the conveying track 100, driving the conveying track 100 to move.

[0041] Specifically, the preheating treatment device 2 includes a preheating housing 201 and a first heating device 9. A preheating inner cavity 202 is arranged inside the preheating housing 201. The first heating device 9 includes a first heater 901, a first blower 903, and a first heating base body 902 with the first heater 901 and the first blower 903 connected to both ends respectively. The first heating base body 902 is provided with a first inner cavity 904. The first heater 901 heats the gas stored in the first inner cavity 904, and the first blower 903 inhales gas from the preheating inner cavity 202 into the first inner cavity 904 and / or the first blower 903 discharges gas from the first inner cavity 904 into the preheating inner cavity 202. In this embodiment, the first blower 903 is provided with a sensor. When the sensor senses an external powder spraying part, it triggers the first blower 903 to output the high-temperature gas in the first inner cavity 904 to the preheating inner cavity 202. When the sensor does not sense, it triggers the first blower 903 to input the gas in the preheating inner cavity 202 into the first inner cavity 904. By setting the first heating device 9, the external powder spraying part passing through the preheating treatment device 2 can be preheated in a timely and effective manner.

[0042] Specifically, the curing treatment device 4 includes a curing housing 401. A curing inner cavity 402 is arranged inside the curing housing 401. The curing inner cavity 402 is communicated with the first inner cavity 904 through the first blower 903. The first heater 901 heats the gas stored in the first inner cavity 904, and the first blower 903 inhales gas from the curing inner cavity 402 into the first inner cavity 904 and / or the first blower 903 discharges gas from the first inner cavity 904 into the curing inner cavity 402. In this embodiment, the first blower 903 is provided with a sensor. When the sensor senses an external powder spraying part, it triggers the first blower 903 to output the high-temperature gas in the first inner cavity 904 to the curing inner cavity 402. When the sensor does not sense, it triggers the first blower 903 to input the gas in the curing inner cavity 402 into the first inner cavity 904. By setting the first heating device 9, the external powder spraying part passing through the curing treatment device 4 can be cured in a timely and effective manner.

[0043] Specifically, the first blower 903 is provided with a first filter screen 905. The first filter screen 905 is provided with a plurality of holes 906 in a hollow structure. The first filter screen 905 is used to filter dust and / or solid particles in the gas. By providing the first filter screen 905, secondary pollution to the external powder spraying parts can be effectively avoided, ensuring the quality of the final product.

[0044] Specifically, the cooling device 5 includes a cold blower 501, a cooling housing 502, and a cooling cavity 503 provided inside the cooling housing 502. The cold blower 501 blows out low-temperature gas to take away the high-temperature gas attached to the external powder spraying parts in the cooling cavity 503, thereby achieving temperature reduction. By providing the cooling device 5, rapid temperature reduction of the external powder spraying parts can be achieved, which is beneficial to shortening the production cycle and improving production efficiency.

[0045] The above content is only a 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 manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A casting powder spraying line, characterized by: The invention comprises a conveying track (100), a hanging frame (101) arranged on the conveying track (100) and moving with the conveying track (100), and a driving device (10) driving the hanging frame (101) to move along the conveying track (100); and also comprises a pretreatment device (1), a preheating device (2), a powder spraying chamber (3), a curing device (4), and a cooling device (5) arranged in sequence along the length direction of the conveying track (100); the hanging frame (101) is used to carry external powder spraying parts; the external powder spraying parts enter the pretreatment device (1) via the conveying track (100) for surface cleaning treatment; after cleaning, the workpiece flows into the preheating device (2) for preheating treatment; after preheating treatment, the workpiece enters the powder spraying chamber (3) for spraying treatment; after spraying, the workpiece flows into the curing device (4) for high-temperature curing. After the workpiece is solidified, it is cooled by a cooling device (5); the preheating treatment equipment (2) comprises a preheating shell (201) and a first heating device (9); a preheating inner cavity (202) is arranged inside the preheating shell (201); the first heating device (9) comprises a first heater (901), a first blower (903) and a first heating base (902) whose two ends are respectively connected to the first heater (901) and the first blower (903); the first heating base (902) is provided with a first inner cavity (904); the first heater (901) heats the gas stored in the first inner cavity (904); the first blower (903) inhales the gas from the preheating inner cavity (202) into the first inner cavity (904) and / or the first blower (903) discharges the gas from the first inner cavity (904) into the preheating inner cavity (202).

2. A casting powder spraying line according to claim 1, characterized in that: The invention also comprises a large cyclone isolation room (8), characterized in that: the powder spraying room (3) is arranged in the large cyclone isolation room (8), an isolation cover (301) is arranged on the outer surface of the powder spraying room (3), the large cyclone isolation room (8) comprises a cyclone separation device (801), the cyclone separation device (801) is provided with a pipe (802) with one end connected to the isolation cover (301), and the cyclone separation device (801) is connected to the isolation cover (301) through the pipe (802).

3. A casting powder spraying line according to claim 1, characterized in that: The powder spraying room (3) is provided with a powder spraying window, and the powder spraying room (3) is equipped with a plurality of powder spraying guns corresponding to the powder spraying windows. External workers and / or machines spray external powder spraying parts in the powder spraying room (3) via the powder spraying guns.

4. A casting powder spraying line according to claim 1, characterized in that: The conveying track (100) is further provided with a rotating wheel mechanism (11), the rotating wheel mechanism (11) comprising an outer wheel (111) arranged at an edge position of the rotating wheel mechanism (11), and a rotating shaft (112) arranged at a center position of the rotating wheel mechanism (11), the outer wheel (111) is rollingly connected to the conveying track (100), and the rotating shaft (112) is fixedly arranged on an external bearing plane.

5. A casting powder spraying line according to claim 1, characterized in that: The driving device (10) comprises a driving motor (102), a driven mechanism (103) and a connecting mechanism (109); the driving motor (102) is provided with a first rotating shaft (104); the driven mechanism (103) is provided with a second rotating shaft (105); the first rotating shaft (104) and the second rotating shaft (105) are rotationally connected by means of an external belt; the driven mechanism (103) is further provided with a third rotating wheel (106) driven by the second rotating shaft (105); the connecting mechanism (109) has a fourth rotating wheel (107); the third rotating shaft and the fourth rotating wheel (107) are rotationally connected by means of an external rack.

6. A casting powder spraying line according to claim 5, characterized in that: The connecting mechanism (109) further comprises a connecting member (108), one end of which is fixedly connected to the fourth rotating wheel (107), and the other end of which is rotatably connected to the conveying track (100).

7. A casting powder spraying line according to claim 1, characterized in that: The curing treatment equipment (4) includes a curing shell (401), a curing inner cavity (402) is arranged inside the curing shell (401), the curing inner cavity (402) is connected to the first inner cavity (904) through a first blower (903), the first heater (901) heats the gas stored in the first inner cavity (904), the first blower (903) inhales the gas from the curing inner cavity (402) into the first inner cavity (904) and / or the first blower (903) discharges the gas from the first inner cavity (904) into the curing inner cavity (402).

8. A casting powder spraying line according to claim 1, characterized in that: The first blower (903) is provided with a first filter (905), the first filter (905) is provided with a plurality of holes (906) and is in a hollow structure, and the first filter (905) is used to filter dust and / or solid particles in the gas.

9. A casting powder spraying line according to claim 1, characterized in that: The cooling device (5) comprises a cooling fan (501), a cooling shell (502), and a cooling inner cavity (503) arranged inside the cooling shell (502); the cooling fan (501) blows out low-temperature gas to cool the external powder spraying parts of the cooling inner cavity (503).

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