Container powder spray line

Abstract

The utility model discloses a container powder spraying production line, including epoxy base powder spraying area, first air skid conveyer, first ground skid conveyer, first conversion conveyer, polyester powder spraying area, second air skid conveyer, second conversion conveyer, second ground skid conveyer and third conversion conveyer, and epoxy base powder spraying area includes first spraying equipment, second spraying equipment and first baking equipment who set apart in proper order along the production line trend, and polyester powder spraying area includes third spraying equipment, fourth spraying equipment and second baking equipment who set apart in proper order along the production line trend, can reduce the shaking of container, and the conveying speed of conversion sequence is greatly improved, is favorable to first spraying equipment, second spraying equipment, third spraying equipment and fourth spraying equipment to spray powder to container, can reduce the spraying operation auxiliary time of container, thereby improves the spraying efficiency of container.

Description

Technical Field

[0001] This utility model relates to the field of container coating technology, and in particular to a container powder coating production line. Background Technology

[0002] Existing container powder coating production lines require coating both the inside and outside of containers with epoxy primer and polyester powder to extend their service life. When transporting containers between different workstations, they are moved via accumulating chain conveyors. However, these conveyors are prone to container swaying and operate at speeds less than or equal to 18 m / min, hindering the powder coating process and extending the coating time. This negatively impacts coating efficiency and production quality. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a container powder coating production line that can improve the production quality and coating efficiency of container coating production lines.

[0004] A container powder coating production line according to an embodiment of the present invention includes: The epoxy primer spraying area includes a first spraying device, a second spraying device, and a first baking device arranged sequentially and at intervals along the production line. The first spraying device is used to spray epoxy primer onto the top, bottom, sides, and bottom of the container. The second spraying device is used to spray epoxy primer onto the remaining exterior of the container. The first baking device is used to bake and cure the epoxy primer. The first aerial skid conveyor is used to hang and lock the top corner pieces of the container. The first aerial skid conveyor can move cyclically around the first spraying equipment. A first ground skid conveyor is used to support the bottom corner pieces of the container. The first ground skid conveyor reciprocates between the second spraying equipment and the first baking equipment. A first ground-to-air transfer conveyor is located between the first spraying equipment and the second spraying equipment. The first transfer conveyor is used to transfer containers on the first aerial skid conveyor to the first ground skid conveyor. The polyester powder coating area includes a third coating device, a fourth coating device, and a second baking device arranged sequentially at intervals along the production line. The third coating device is used to coat the top, bottom, sides, and bottom of the container with polyester powder. The fourth coating device is used to coat the remaining exterior of the container with polyester powder. The second baking device is used to bake and cure the polyester powder. The second aerial skid conveyor is used to hang and lock the top corner pieces of the container, and the second aerial skid conveyor can move around the third spraying equipment; The second ground-to-air conversion conveyor is located between the third spraying equipment and the first baking equipment. The second conversion conveyor is used to transfer containers on the first ground skid conveyor to the second air skid conveyor. The second ground skid conveyor is used to support the bottom corner pieces of the container, and the second ground skid conveyor reciprocates between the fourth spraying equipment and the second baking equipment; A third ground-to-air transfer conveyor is located between the third and fourth spraying equipment. The third transfer conveyor is used to transfer containers from the second aerial skid conveyor to the second ground skid conveyor.

[0005] The container powder coating production line according to the embodiments of this utility model has at least the following beneficial effects: During container painting, a first aerial skid conveyor suspends and locks the top corner fittings of the container, suspending it in the air. This allows the first painting equipment to apply epoxy primer to the container's interior top, bottom, sides, and bottom. Next, a first ground-to-air transfer conveyor transfers the container from the aerial skid conveyor to a first ground skid. At this point, the container's bottom corner fittings rest against the first ground skid. The first ground skid conveyor then transports the container and its ground skid to a second painting equipment, where the second equipment applies epoxy primer to the remaining exterior of the container. At this stage, the container's interior top, bottom, sides, and bottom are all coated with epoxy primer. Then, the first ground skid conveyor transports the container and its ground skid to a first baking equipment to cure the epoxy primer. Finally, a second ground-to-air transfer conveyor transfers the container from the first ground skid conveyor to a second aerial skid conveyor, suspending it in the air. The second aerial skid conveyor then transports the container and its aerial skid to a second... The third spraying equipment enables the application of polyester powder to the top, bottom, sides, and bottom of the container. Then, a third ground-to-air transfer conveyor transfers the container from the second aerial skid conveyor to the second ground skid. At this point, the container's bottom corners rest against the first ground skid. The second ground skid conveyor then transports the container and the ground skid to the fourth spraying equipment, which applies polyester powder to the remaining exterior of the container. At this point, both the inner and outer surfaces of the container are coated with polyester powder. Finally, the second ground skid conveyor transports the container to the second baking equipment to bake and cure the polyester powder. This method eliminates the need for traditional container conveyor chains, reduces container swaying, and significantly increases conveying speed. It facilitates powder coating by the first, second, third, and fourth spraying equipment, reducing coating operations and running time, thereby improving coating efficiency and production quality.

[0006] According to some embodiments of the present invention, the epoxy base powder spraying area further includes a first preheating device, which is located at the front end of the first spraying device and is used to preheat the container.

[0007] According to some embodiments of the present invention, the epoxy base powder spraying area further includes a first cooling device, which is located at the rear end of the first baking device to cool the epoxy base powder.

[0008] According to some embodiments of the present invention, the epoxy base powder spraying area further includes a second preheating device, which is located between the second spraying device and the first baking device, and is used to preheat the epoxy base powder.

[0009] According to some embodiments of the present invention, the epoxy base powder spraying area is provided with a first touch-up spraying station, which is located between the second spraying equipment and the second preheating equipment. The first touch-up spraying station is used to touch up the spraying dead corners of the container.

[0010] According to some embodiments of the present invention, the polyester powder coating area further includes a second cooling device, which is located at the rear end of the second baking device to cool the polyester powder.

[0011] According to some embodiments of the present invention, the polyester powder spraying area further includes a third preheating device, which is located between the fourth spraying device and the second baking device, and is used to preheat the polyester powder.

[0012] According to some embodiments of the present invention, the polyester powder coating area is provided with a second re-spraying station, which is located between the fourth coating equipment and the third preheating equipment. The second re-spraying station is used to re-spray the coating dead corners of the container.

[0013] According to some embodiments of the present invention, a first buffer area is also included, which is disposed adjacent to the epoxy base powder spraying area, and the first buffer area is used to buffer the container that has been baked by the first baking equipment.

[0014] According to some embodiments of the present invention, a second buffer area is also included, which is disposed adjacent to the polyester base powder spraying area, and the second buffer area is used to buffer the container after it has been baked by the second baking equipment.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a container powder coating production line according to an embodiment of the present invention.

[0017] Figure label: First spraying equipment 110, second spraying equipment 120, first baking equipment 130, first preheating equipment 140, first cooling equipment 150, second preheating equipment 160, first respraying station 170, fourth conversion conveyor 180; First aerial skid conveyor 210, first ground skid conveyor 220, first transfer conveyor 230, second aerial skid conveyor 240, second transfer conveyor 250, second ground skid conveyor 260, third transfer conveyor 270; The third spraying equipment 310, the fourth spraying equipment 320, the second baking equipment 330, the second cooling equipment 340, the third preheating equipment 350, and the second touch-up spraying station 360; First cache 410, second cache 420. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] In related technologies, container powder coating production lines require the application of epoxy primer and polyester powder to both the interior and exterior of containers to improve their service life. When containers are transported between different workstations via accumulating chain conveyors, the containers tend to sway, which hinders powder coating and prolongs the coating time, thus affecting coating efficiency.

[0023] Reference Figure 1 According to an embodiment of the present invention, a container powder coating production line includes an epoxy base powder coating area, a first overhead skid conveyor 210, a first ground skid conveyor 220, a first conversion conveyor 230, a polyester powder coating area, a second overhead skid conveyor 240, a second conversion conveyor 250, a second ground skid conveyor 260, and a third conversion conveyor 270. The epoxy base powder coating area includes a first coating device 110, a second coating device 120, and a first baking device 130 arranged sequentially and at intervals along the production line. The first coating device 110 is used to coat the entire inner wall of the container and the outer wall of the container located at the bottom with epoxy base powder. The second coating device 120 is used to coat the remaining outer wall of the container with epoxy base powder. The system includes a first baking device 130 for baking and curing epoxy base powder, a first overhead skid conveyor 210 for hoisting containers and capable of moving around the first spraying device 110, a first ground skid conveyor 220 for carrying containers and reciprocating between the second spraying device 120 and the first baking device 130, a first transfer conveyor 230 located between the first spraying device 110 and the second spraying device 120, and used to transfer containers from the first overhead skid conveyor 210 to the first ground skid conveyor 220. The polyester powder coating area includes a third spraying device 310 and a fourth spraying device 320 arranged sequentially at intervals along the production line. The equipment includes a spraying device 320, a second baking device 330, a third spraying device 310 for spraying polyester powder onto all inner walls and the bottom outer wall of the container, a fourth spraying device 320 for spraying polyester powder onto the remaining outer walls of the container, a second baking device 330 for baking and curing the polyester powder, a second aerial skid conveyor 240 for hoisting the container, and the second aerial skid conveyor 240 is movable around the third spraying device 310. A second transfer conveyor 250 is located between the third spraying device 310 and the first baking device 130, and is used to transfer containers from the first ground skid conveyor 220 to the second aerial skid conveyor 240. 60 is used to carry containers. The second ground skid conveyor 260 reciprocates between the fourth spraying equipment 320 and the second baking equipment 330. The third transfer conveyor 270 is located between the third spraying equipment 310 and the fourth spraying equipment 320. The third transfer conveyor 270 is used to transfer containers on the second aerial skid conveyor 240 to the second ground skid conveyor 260. In this way, the traditional method of using a stacking chain conveyor to transport containers can be abandoned, the shaking of containers can be reduced, and it is beneficial for the first spraying equipment 110, the second spraying equipment 120, the third spraying equipment 310 and the fourth spraying equipment 320 to spray powder on the containers. This can reduce the spraying time of the containers and thus improve the spraying efficiency of the containers.

[0024] For example, during container painting, the first aerial skid conveyor 210 suspends and locks the top corner fittings of the container, suspending the container in the air. This allows the first painting equipment 110 to spray epoxy primer onto the top, bottom, sides, and bottom of the container. Then, the first ground-to-air transfer conveyor 230 transfers the container from the first aerial skid conveyor 210 to the first ground skid conveyor 220. At this point, the bottom corner fittings of the container abut against the first ground skid conveyor 220, which then transports the container to the second painting stage. Equipment 120 enables the second spraying equipment 120 to spray epoxy primer onto the remaining exterior of the container. At this time, both the inner and outer surfaces of the container are coated with epoxy primer. Then, the first ground skid conveyor 220 transports the container to the first baking equipment 130 to bake and cure the epoxy primer. Afterwards, the second ground-to-air transfer conveyor 250 transfers the container from the first ground skid conveyor 220 to the second aerial skid conveyor 240, suspending the container in the air. The second aerial skid conveyor then transports the container to the third spraying equipment 310. This allows the third spraying equipment 310 to spray polyester powder onto the top, bottom, sides, and bottom of the container. Then, the third ground-to-air transfer conveyor 270 transfers the container from the second aerial skid conveyor 240 to the second ground skid conveyor 260. At this point, the bottom corner fittings of the container abut against the second ground skid conveyor 260, which then transports the container to the fourth spraying equipment 320. The fourth spraying equipment 320 then sprays polyester powder onto the remaining exterior of the container. At this point, the inner surface of the container and... The outer surface of the container is coated with polyester powder. Then, the second ground skid conveyor 260 transports the container to the second baking equipment 330 to bake and cure the polyester powder. This eliminates the need for the traditional method of using a stacking chain conveyor to transport containers, reduces container swaying, and significantly increases the conveying speed. This is beneficial for the first spraying equipment 110, the second spraying equipment 120, the third spraying equipment 310, and the fourth spraying equipment 320 to spray powder onto the container, reducing the container spraying operation and running time, thereby improving the efficiency and quality of container spraying.

[0025] It is understandable that by setting up the first ground-to-air conversion conveyor 230 and the second ground-to-air conversion conveyor 250, seamless switching between air and ground transportation modes can be achieved, eliminating the frequent start-stop swaying of traditional accumulation chain conveyors, reducing container position deviation, and improving container transportation efficiency, which will not be elaborated further here.

[0026] Understandably, by setting up the first aerial skid conveyor 210 and the second aerial skid conveyor 240, the container can be suspended in the air. When the container is suspended, there is no contact surface friction, which greatly reduces transportation shaking and shortens the single spraying time. By setting up the first ground skid conveyor 220 and the second ground skid conveyor 260, damage to the first aerial skid conveyor 210 and the second aerial skid conveyor 240 caused by high-temperature baking can be avoided, which can improve the service life of the equipment and stably support the container, preventing uneven curing caused by displacement during baking. Further details will not be elaborated here.

[0027] It should be noted that the first aerial skid conveyor 210 and the second aerial skid conveyor 240 are common knowledge in the art. For example, the first aerial skid conveyor 210 includes a first roller bed, a first skid, and a spreader. The first roller bed includes a first frame, a first roller assembly mounted on the first frame, a first drive device for driving the first roller assembly, and a first transmission mechanism cooperating with the first roller assembly. The first roller assembly is composed of multiple first rollers. The first skid has a frame structure, and first frames supporting the first roller assembly are provided on both sides of the first skid. The spreader is connected to the first skid and is located below the first skid. The first transmission mechanism is a conveyor belt or chain, and the first drive device is a motor. In this way, containers can be hoisted and transported. The structure of the second aerial skid conveyor 240 is the same as that of the first aerial skid conveyor 210, and will not be described in detail here.

[0028] It should be noted that the first ground skid conveyor 220 and the second ground skid conveyor 260 are common knowledge in the art. For example, the second ground skid conveyor 260 includes a second roller bed, a second skid, and a carrier. The second roller bed includes a second frame, a second roller assembly mounted on the second frame, a second drive device for driving the second roller assembly, and a second transmission mechanism cooperating with the second roller assembly. The second roller assembly consists of multiple second rollers. The second skid has a frame structure, and second frames supporting the second roller assembly are provided on both sides of the second skid. The carrier is connected to the second skid and is located below the second skid. The second transmission mechanism is a conveyor belt or chain, and the second drive device is a motor. In this way, containers can be hoisted and transported. The structure of the second ground skid conveyor 260 is the same as that of the second ground skid conveyor 260, and will not be described again here.

[0029] It should be noted that the first spraying equipment 110 includes a robotic arm, a spray gun, and a material tank containing epoxy primer. The spray gun is located at the output end of the robotic arm, enabling the robotic arm to drive the spray gun to move and thus spray epoxy primer onto the container. The robotic arm can be a three-axis or four-axis robotic arm, etc., and the first spraying equipment 110 can be configured with one or more units; no limitation is made here. Furthermore, the specific structures of the second spraying equipment 120, the third spraying equipment 310, and the fourth spraying equipment 320 are the same as those of the first spraying equipment 110, and will not be described in detail here.

[0030] It should be noted that the first conversion conveyor 230 includes a third drive unit and a liftable conveyor platform. The third drive unit is a motor. The third drive unit can drive the conveyor platform to rise and fall through a screw drive structure. When the container is transferred from the air to the ground, the third drive unit drives the container to fall. When the container is transferred from the ground to the air, the third drive unit drives the container to rise. The specific structures of the second conversion conveyor 250 and the third conversion conveyor 270 are the same as those of the first conversion conveyor 230, and are not limited here.

[0031] It is understood that the first baking equipment 130 includes a first housing and a first heating unit disposed within the first housing. The first heating unit can heat the first housing to raise the ambient temperature inside the first housing. When the container enters the first housing, it can be heated by the first heating unit. The first heating unit includes, but is not limited to, an electromagnetic heater, an infrared heater, or a resistance heater. It should be noted that because the container is transported into the first baking equipment 130 via a first skid conveyor, the first housing can be a closed structure, reducing energy loss and exhaust gas leakage. Furthermore, the specific structure of the second baking equipment 330 is the same as that of the first baking equipment 130, and will not be described again here.

[0032] In some embodiments of this utility model, the epoxy base powder spraying area further includes a first preheating device 140, which is located at the front end of the first spraying device 110. The first preheating device 140 is used to preheat the container, enhance the adsorption of epoxy base powder, reduce sagging, and thus improve the spraying quality of the container.

[0033] It should be noted that by setting up the first preheating device 140, the container can be preheated to prevent the epoxy primer from failing to adhere stably to the container when the temperature is low in winter, thereby improving the coating quality of the container.

[0034] It should be noted that the first preheating device 140 includes a second container and a second heating unit disposed in the second container. The second heating unit can heat the second container to raise the ambient temperature inside the second container. When the container enters the second container, it can be heated by the second heating unit. The second heating unit includes, but is not limited to, an electromagnetic heater, an infrared heater, or a resistance heater.

[0035] In some embodiments of this utility model, the epoxy primer spraying area further includes a fourth conversion conveyor 180 and a third ground skid conveyor. The fourth conversion conveyor 180 is located between the first aerial skid conveyor 210 and the first preheating device 140. The third ground skid conveyor is movably disposed between the third ground skid conveyor and the first preheating device 140 to transport containers from the first preheating device 140 to the fourth conversion conveyor 180, so that the fourth conversion conveyor 180 can transport containers on the third ground skid conveyor to the first aerial skid conveyor 210, so that the containers are suspended in the air.

[0036] It should be noted that the specific structure of the fourth conversion conveyor 180 is the same as that of the first conversion conveyor 230, and the specific structure of the third ground skid conveyor is the same as that of the first ground skid conveyor 220, which will not be described again here.

[0037] In some embodiments of this utility model, the epoxy base powder spraying area further includes a first cooling device 150, which is located at the rear end of the first baking device 130 to cool the epoxy base powder, thereby accelerating the cooling speed of the container and improving the spraying efficiency of the container powder coating production line.

[0038] It should be noted that the first cooling device 150 can be a refrigeration air conditioner, including but not limited to central air conditioning or ducted air conditioning.

[0039] In some embodiments of this utility model, the epoxy base powder spraying area further includes a second preheating device 160. The second preheating device 160 is located between the second spraying device 120 and the first baking device 130. The second preheating device 160 is used to preheat the epoxy base powder, which can prevent the epoxy base powder from curing inconsistently due to excessive temperature difference during the process of transporting the container from the second spraying device 120 to the first baking device 130, thereby improving the spraying quality of the epoxy base powder.

[0040] It should be noted that the specific structure of the second preheating device 160 is the same as that of the first preheating device 140, and will not be described again here.

[0041] In some embodiments of this utility model, the epoxy base powder spraying area is provided with a first touch-up spraying station 170. The first touch-up spraying station 170 is located between the second spraying equipment 120 and the second preheating equipment 160. The first touch-up spraying station 170 is used to touch up the spraying dead corners of the container, eliminate weak points in the coating, and extend the service life of the container.

[0042] It should be noted that the dead corners for painting containers refer to the welds or edges of the containers, and are not restricted here.

[0043] In some embodiments of this utility model, the polyester powder coating area further includes a second cooling device 340, which is located at the rear end of the second baking device 330 to cool the polyester powder, thereby accelerating the cooling speed of the container and improving the coating efficiency of the container powder coating production line.

[0044] It should be noted that the second cooling device 340 can be a refrigeration air conditioner or a fan, including but not limited to central air conditioning or fan cooling systems.

[0045] In some embodiments of this utility model, the polyester powder coating area further includes a third preheating device 350. The third preheating device 350 is located between the fourth coating device 320 and the second baking device 330. The third preheating device 350 is used to preheat the polyester powder, which can prevent the polyester powder from curing inconsistently or having different surface colors due to excessive temperature difference during the process of the container being transported from the fourth coating device 320 to the second baking device 330, thereby improving the coating quality of the epoxy primer.

[0046] It should be noted that the specific structure of the second preheating device 160 is the same as that of the first preheating device 140, and will not be described again here.

[0047] In some embodiments of this utility model, the polyester powder coating area is provided with a second re-spraying station 360, which is located between the fourth coating equipment 320 and the third preheating equipment 350. The second re-spraying station 360 is used to re-spray the coating dead corners of the container, eliminate weak points in the coating, and extend the service life of the container.

[0048] In some embodiments of this utility model, a first buffer area 410 is also included. The first buffer area 410 is arranged adjacent to the epoxy base powder spraying area. The first buffer area 410 is used to buffer the containers that have been baked by the first baking equipment 130. On the one hand, when the operators are resting, the operators can transfer the containers in the first baking equipment 130 to the first buffer area 410, which can solve the problem of the container's high-temperature curing time being too long. On the other hand, the first buffer area 410 can balance the difference in cycle time between the preceding and following processes, thereby preventing the production line from being blocked or running idle.

[0049] In some embodiments of this utility model, a second buffer zone 420 is also included. The second buffer zone 420 is arranged adjacent to the polyester base powder spraying area. The second buffer zone 420 is used to buffer the containers that have been baked by the second baking equipment 330. On the one hand, when the operators are resting, the operators can transfer the containers in the second baking equipment 330 to the second buffer zone 420, which can solve the problem of the container's high-temperature curing time being too long. On the other hand, the second buffer zone 420 can balance the difference in cycle time between the preceding and following processes, thereby preventing the production line from being blocked or running idle.

[0050] In some embodiments of this utility model, a sandblasting area is also included. The sandblasting area is located at the front end of the epoxy primer spraying area. The sandblasting area can sandblast the inner and outer surfaces of the container to clean the oxide scale, loose rust, etc. on the inner and outer surfaces of the container, improve the surface roughness and adhesion, and prepare for subsequent painting.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A container powder coating production line, characterized in that, include: The epoxy base powder spraying area includes a first spraying device (110), a second spraying device (120), and a first baking device (130) arranged sequentially and at intervals along the production line. The first spraying device (110) is used to spray epoxy base powder onto the top, bottom, sides, and bottom of the container. The second spraying device (120) is used to spray epoxy base powder onto the remaining exterior of the container. The first baking device (130) is used to bake and cure the epoxy base powder. The first aerial skid conveyor (210) is used to hang and lock the top corner pieces of the container. The first aerial skid conveyor (210) can move cyclically around the first spraying equipment (110). A first ground skid conveyor (220) is used to support the bottom corner pieces of the container. The first ground skid conveyor (220) moves cyclically between the second spraying equipment (120) and the first baking equipment (130). The first ground-to-air transfer conveyor (230) is located between the first spraying equipment (110) and the second spraying equipment (120). The first ground-to-air transfer conveyor (230) is used to transfer containers on the first air skid conveyor (210) to the first ground skid conveyor (220). The polyester powder coating area includes a third coating device (310), a fourth coating device (320), and a second baking device (330) arranged sequentially at intervals along the production line. The third coating device (310) is used to coat the top, bottom, sides, and bottom of the container with polyester powder. The fourth coating device (320) is used to coat the remaining exterior of the container with polyester powder. The second baking device (330) is used to bake and cure the polyester powder. The second aerial skid conveyor (240) is used to hang and lock the top corner pieces of the container. The second aerial skid conveyor (240) can move cyclically around the third spraying equipment (310). The second ground-to-air transfer conveyor (250) is located between the third spraying equipment (310) and the first baking equipment (130). The second ground-to-air transfer conveyor (250) is used to transfer containers on the first ground skid conveyor (220) to the second air skid conveyor (240). The second ground skid conveyor (260) is used to support the bottom corner pieces of the container. The second ground skid conveyor (260) moves cyclically between the fourth spraying equipment (320) and the second baking equipment (330). A third ground-to-air transfer conveyor (270) is located between the third spraying equipment (310) and the fourth spraying equipment (320), and the third ground-to-air transfer conveyor (270) is used to transfer containers on the second air skid conveyor (240) to the second ground skid conveyor (260).

2. The container powder spray painting line according to claim 1, characterized in that, The epoxy base powder spraying area also includes a first preheating device (140), which is located at the front end of the first spraying device (110) and is used to preheat the container.

3. The container powder spray paint line of claim 1, wherein, The epoxy base powder spraying area also includes a first cooling device (150), which is located at the rear end of the first baking device (130) to cool the epoxy base powder.

4. The container powder spray paint line of claim 1, wherein, The epoxy base powder spraying area also includes a second preheating device (160), which is located between the second spraying device (120) and the first baking device (130). The second preheating device (160) is used to preheat the epoxy base powder.

5. The container powder spray painting line according to claim 4, characterized in that, The epoxy base powder spraying area is provided with a first touch-up spraying station (170), which is located between the second spraying equipment (120) and the second preheating equipment (160). The first touch-up spraying station (170) is used to touch up the spraying dead corners of the outer wall of the container.

6. The container powder spray painting line according to claim 1, characterized in that, The polyester powder coating area also includes a second cooling device (340), which is located at the rear end of the second baking device (330) to cool the polyester powder.

7. The container powder spray painting line according to claim 1, characterized in that, The polyester powder coating area also includes a third preheating device (350), which is located between the fourth coating device (320) and the second baking device (330). The third preheating device (350) is used to preheat the polyester powder.

8. The container powder spray painting line according to claim 7, characterized in that, The polyester powder coating area is provided with a second touch-up spraying station (360), which is located between the fourth coating equipment (320) and the third preheating equipment (350). The second touch-up spraying station (360) is used to touch up the coating dead corners of the outer wall of the container.

9. The container powder spray painting line according to claim 1, characterized in that, It also includes a first buffer area (410), which is adjacent to the epoxy base powder spraying area. The first buffer area (410) is used to buffer the container that has been baked by the first baking equipment (130).

10. The container powder spray painting line according to claim 1, characterized in that, It also includes a second buffer area (420), which is arranged adjacent to the polyester base powder spraying area. The second buffer area (420) is used to buffer the container after it has been baked by the second baking equipment (330).

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