An apparatus for uniformly coating the surface of an aluminum alloy profile

CN122522232APending Publication Date: 2026-08-07HUBEI XINGYI NEW MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUBEI XINGYI NEW MATERIAL TECH CO LTD
Filing Date
2026-07-01
Publication Date
2026-08-07

AI Technical Summary

Technical Problem

然而,现有喷淋处理装置在面对不同截面形状或异形型材时,喷淋布局难以根据型材的具体轮廓灵活调整,导致喷射覆盖范围与型材表面难以良好匹配;同时,装夹、位移与旋转动作之间的协同性不足,使得多面处理的操作流程较为繁琐,处理效率与涂覆均匀性均受到制约

Benefits of technology

本发明中,根据型材形状,工作人员可先通过锁止部调整相应喷淋部在门字形的安装部上的安装数量与位置并锁止,以形成多方位喷射布局,随后,将型材置于夹持固定组件的两个夹持端上,并分别夹持固定型材的首尾两端;操作完毕时,启动第一位移组件沿基座的X轴往复滑动,带动涂覆组件对型材进行喷淋涂覆,当需要处理其他面时,夹持固定组件带动型材旋转至合适角度,再由第一位移组件配合涂覆组件进行喷淋,即可对型材各表面全面处理,从而方便实际使用。

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Abstract

The application discloses an aluminum alloy profile surface passivation uniform coating device, which comprises a base, a first displacement assembly arranged on the base, the first displacement assembly being capable of reciprocating sliding along the X-axis direction of the base, at least one coating assembly, the coating assembly comprising a mounting part, a spraying part and a locking part, the mounting part being in the shape of a door character and arranged on the first displacement assembly in three, the locking part being arranged on the spraying part, capable of moving the spraying part to the corresponding position of the mounting part and locking the position, the spraying part being used for spraying treatment medium on the profile arranged on the base to complete passivation coating treatment on the profile surface, and a clamping and fixing assembly arranged on the base, the clamping and fixing assembly having two clamping ends capable of approaching or moving away from each other, and the clamping and fixing assembly being capable of rotating and adjusting after clamping the profile. The application has the advantages of flexible and adjustable spraying layout, uniform coating effect on the profile, and convenience in actual use.
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Description

Technical Field

[0001] This invention relates to the field of profile processing technology, and in particular to a device for uniformly coating and passivating the surface of aluminum alloy profiles. Background Technology

[0002] Aluminum alloy profiles, due to their lightweight, high strength, and ease of processing, are widely used in architectural decoration, transportation, electronics, and industrial profiles. To improve the corrosion resistance and oxidation resistance of aluminum alloy profiles and extend their service life, passivation treatment is the core process of surface treatment. This involves forming a uniform and dense passivation protective film on the profile surface to isolate it from air and media corrosion. Current treatment methods generally involve fixing the profile and then coating its surface using a spraying device, with multi-faceted treatment possible by flipping the profile. However, existing spraying devices struggle to flexibly adjust the spray layout according to the specific contours of profiles with different cross-sectional shapes or irregular shapes, resulting in poor matching between the spray coverage area and the profile surface. Furthermore, insufficient coordination between clamping, displacement, and rotation makes the multi-faceted treatment process cumbersome, limiting both processing efficiency and coating uniformity. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings mentioned above by providing a passivation and uniform coating device for aluminum alloy profiles, which achieves flexible and adjustable spray layout and uniform coating of the profiles.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a passivation and uniform coating device for aluminum alloy profiles, comprising: A base, on which a first displacement component is provided, the first displacement component being capable of reciprocating along the X-axis direction of the base; At least one coating component includes a mounting part, a spraying part, and a locking part. The number of mounting parts is three and they are arranged in a U-shape on the first displacement component. The locking part is arranged on the spraying part and can drive the spraying part to move to the corresponding position of the mounting part and lock it in place. The spraying part is used to spray a treatment medium onto the profile arranged on the base to complete the passivation coating treatment on the surface of the profile. The clamping and fixing assembly is mounted on the base and has two clamping ends that can be brought close to or moved away from each other. After clamping the profile, it can also drive the profile to rotate and adjust.

[0005] Furthermore, the first displacement component includes a first drive unit disposed on the base, the base is provided with a slide table that can slide along its X-axis direction, and the slide table is provided with a gantry that can slide along its Z-axis direction. A linear module is vertically mounted on the slide, and the gantry frame is mounted at the moving end of the linear module.

[0006] Furthermore, the mounting part includes multiple mounting guide rails respectively disposed on the inner walls and the inner top wall of opposite sides of the gantry frame. An inlet and outlet are provided on one side of the mounting guide rail for the locking part to enter and exit. A first rack is also provided in the mounting guide rail along its length.

[0007] Furthermore, the mounting rails on the gantry are all staggered from each other.

[0008] Furthermore, the locking part includes a mounting block that can pass through the corresponding inlet and outlet and slide into the corresponding mounting guide rail. The mounting block has an adjustment groove, in which a second rack is slidably disposed. A contact strip is also slidably inserted into the adjustment groove. The second rack has an inclined surface on the side near the contact strip. The contact strip can move and abut against the corresponding inclined surface of the second rack, causing the second rack to slide towards the side closer to the first rack. An operating lever is rotatably mounted on the abutment bar. The operating lever rotates at a 90-degree angle. A lock cylinder is mounted at one end of the operating lever. An operating groove and a locking groove are interconnected within the mounting block. One end of the operating lever can slide and extend into the operating groove, and the lock cylinder can simultaneously slide into the locking groove. The operating lever can also drive the lock cylinder to rotate 90 degrees in the locking groove to a locked position.

[0009] Furthermore, both the abutment bar and the operating lever are provided with locking holes. When the operating lever is rotated 90 degrees to the locked position, the locking hole on it is aligned with the locking hole on the abutment bar.

[0010] Furthermore, the spray unit includes a solenoid valve mounted on the mounting block, and a telescopic rod is provided at the output end of the solenoid valve. The solenoid valve can cooperate with an external pipe and a hydraulic cylinder to drive the moving end of the telescopic rod to extend and retract. The telescopic rod is equipped with a nozzle and a sensing component at its moving end.

[0011] Furthermore, the clamping and fixing assembly includes a second displacement assembly disposed on the base, the second displacement assembly having two moving ends, and each moving end being provided with a clamping part.

[0012] Furthermore, the base is provided with a groove in the shape of a strip, and the second displacement component includes two sets of sliders that are slidably disposed in the groove. The base is also provided with a linear guide rail with a power source. The linear guide rail includes a bidirectional lead screw with two sections of threads in opposite directions. The two sets of sliders are respectively screwed to the two sections of threads of the bidirectional lead screw. The clamping part includes a mounting plate disposed on the slider, a fixed platform disposed on the mounting plate, a semi-circular insertion groove being formed on the fixed platform, a notched gear ring being rotatably disposed at the corresponding insertion groove on the fixed platform, a gear being rotatably disposed on the fixed platform to mesh with the gear ring, a servo motor being disposed on the fixed platform to drive the gear to rotate, and supports being disposed on the inner walls of opposite sides of the gear ring, with gripper cylinders disposed on the supports.

[0013] Furthermore, the base is provided with two symmetrically distributed air-suction components, which are used to suck up and collect excess passivation coating medium during spraying.

[0014] The beneficial effects of this invention are reflected in: In this invention, based on the shape of the profile, the operator can first adjust the number and position of the corresponding spraying units on the U-shaped mounting part through the locking part and lock them to form a multi-directional spraying layout. Then, the profile is placed on the two clamping ends of the clamping and fixing component, and the first and last ends of the profile are clamped and fixed respectively. When the operation is completed, the first displacement component is started to slide back and forth along the X-axis of the base, driving the coating component to spray and coat the profile. When other surfaces need to be treated, the clamping and fixing component drives the profile to rotate to a suitable angle, and then the first displacement component cooperates with the coating component to spray, so that all surfaces of the profile can be fully treated, thus facilitating actual use. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention; Figure 2 This is a bottom view diagram of the present invention; Figure 3 This is a first partial schematic diagram of the coating component in this invention; Figure 4 This is a second partial schematic diagram of the coating component in this invention; Figure 5 In this invention Figure 3 An enlarged schematic diagram of A shown; Figure 6 This is a third partial schematic diagram of the coating component in this invention; Figure 7 This is a partial schematic diagram of the clamping and fixing component in this invention.

[0016] In the picture: 1. Base; 2. First displacement assembly; 201. First drive unit; 202. Slide table; 203. Gantry frame; 204. Linear module; 3. Coating assembly; 301. Mounting guide rail; 302. Inlet / outlet; 303. First rack; 304. Mounting block; 305. Second rack; 306. Abutment bar; 307. Operating lever; 308. Lock cylinder; 309. Operating groove; 310. Locking groove; 31 1. Lock hole; 312. Solenoid valve; 313. Telescopic rod; 314. Nozzle; 315. Sensing component; 4. Clamping and fixing assembly; 401. Slider; 402. Linear guide rail; 403. Clamping part; 4031. Mounting plate; 4032. Fixing platform; 4033. Gear ring; 4034. Gear; 4035. Servo motor; 4036. Support; 4037. Grip cylinder; 5. Suction assembly. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-7 The present invention discloses a passivation uniform coating device for aluminum alloy profiles, including a base 1, a first displacement component 2 disposed on the base 1, the first displacement component 2 being able to slide back and forth along the X-axis direction of the base 1, and at least one coating component 3 disposed on the first displacement component 2.

[0019] In one embodiment, the coating component 3 includes a mounting part, a spraying part, and a locking part. The mounting part consists of three parts arranged in a U-shape on the first displacement component 2. The locking part is located on the spraying part and can move the spraying part to the corresponding position of the mounting part and lock it in place. The spraying part is used to spray the treatment medium onto the profile disposed on the base 1 to complete the passivation coating treatment on the surface of the profile. The base 1 is provided with a clamping and fixing component 4, which has two clamping ends that can be close to or far from each other, and can also rotate and adjust the profile after clamping it.

[0020] In practice, depending on the shape of the profile, the operator can first adjust the number and position of the corresponding spray units on the U-shaped mounting part through the locking part and lock them to form a multi-directional spraying layout. Then, the profile is placed on the two clamping ends of the clamping and fixing component 4, and the first and last ends of the profile are clamped and fixed respectively. When the operation is completed, the first displacement component 2 is started to slide back and forth along the X-axis of the base 1, driving the coating component 3 to spray and coat the profile. When other surfaces need to be treated, the clamping and fixing component 4 drives the profile to rotate to a suitable angle, and then the first displacement component 2 cooperates with the coating component 3 to spray, so that all surfaces of the profile can be fully treated, thus facilitating actual use.

[0021] In one embodiment, the first displacement component 2 includes a first drive unit 201 mounted on a base 1. The base 1 is provided with a slide table 202 that can slide along its X-axis direction. The slide table 202 is provided with a gantry 203 that can slide along its Z-axis direction. A linear module 204 is vertically arranged on the slide table 202. The gantry 203 is arranged at the moving end of the linear module 204.

[0022] In specific implementation, the first drive unit 201 includes a power source and a slide rail. The power source can be a linear motor, and the slide table 202 is installed at the moving end of the slide rail. In use, the power source of the first drive unit 201 cooperates with the slide rail to drive the slide table 202 to move linearly along the X-axis direction of the base 1, while the linear module 204 can drive the gantry 203 to move linearly along its Z-axis direction. Through multi-directional adjustment, it can be adapted to different profiles and spray treatment.

[0023] In one embodiment, the mounting part includes a plurality of mounting guide rails 301 respectively mounted on the inner walls of opposite sides and the inner top wall of the gantry frame 203. An inlet and outlet 302 is provided on one side of the mounting guide rail 301 for the locking part to enter and exit. A first rack 303 is also provided in the mounting guide rail 301 along its length direction.

[0024] In practice, the corresponding locking part can slide and be inserted into the mounting guide rail 301. The staff can slide the locking part to the corresponding position according to the actual needs. After adjustment, it can be locked in the corresponding position of the first rack 303 to fix it.

[0025] In one embodiment, the mounting rails 301 on the gantry 203 are all staggered.

[0026] This design allows the spray sections on each mounting rail 301 to be staggered, thereby preventing excessive spray material from splashing onto the corresponding spray section and ensuring the spraying effect.

[0027] In one embodiment, the locking part includes a mounting block 304, which can pass through the corresponding inlet / outlet 302 and slide into the corresponding mounting guide rail 301. The mounting block 304 has an adjustment groove, in which a second rack 305 is slidably mounted, and an abutment strip 306 is slidably inserted. The side of the second rack 305 near the abutment strip 306 has an inclined surface. An operating rod 307 is rotatably mounted on the abutment strip 306. The operating rod 307 has a rotation angle of ninety degrees. A lock cylinder 308 is mounted on one end of the operating rod 307. The mounting block 304 has an operating groove 309 and a locking groove 310 that are interconnected. One end of the operating rod 307 can slide and extend into the operating groove 309, and the lock cylinder 308 can simultaneously slide into the locking groove 310. The operating rod 307 can also drive the lock cylinder 308 to rotate ninety degrees in the locking groove 310 to a locked position.

[0028] In practice, the operator can press the abutment bar 306 to slide it into the adjustment groove. The abutment bar 306 can move and abut against the corresponding inclined surface of the second rack 305, causing the second rack 305 to slide towards the side closer to the first rack 303. When the abutment bar 306 slides, the operating rod 307 connected to it moves synchronously, which will drive the lock cylinder 308 to slide into the locking groove 310. Then, the operating rod 307 is rotated 90 degrees, so that the lock cylinder 308 rotates synchronously and locks in the locking groove 310, thereby enabling the abutment bar 306 to be positioned and locked. When it is necessary to release the positioning, it is only necessary to reverse the operation.

[0029] In one embodiment, both the abutment bar 306 and the operating lever 307 are provided with locking holes 311.

[0030] In practice, to further improve the reliability of locking, when the operating lever 307 is rotated 90 degrees to the locked position, the locking hole 311 on it is exactly aligned with the locking hole 311 on the contact bar 306. At this time, the operator can insert the external pin into the two locking holes 311 to play a double security role. When it is necessary to release the positioning, first pull out the pin, and then operate the operating lever 307 in the opposite direction.

[0031] In one embodiment, the spray unit includes a solenoid valve 312 mounted on the mounting block 304. A telescopic rod 313 is mounted at the output end of the solenoid valve 312. The solenoid valve 312 can cooperate with an external pipe and a hydraulic cylinder to drive the moving end of the telescopic rod 313 to extend and retract. A nozzle 314 and a sensing component 315 are mounted at the moving end of the telescopic rod 313.

[0032] In practical implementation, when there are multiple spray units, each nozzle 314 can be connected to the liquid source and pump equipment through a unified external hose, thereby enabling centralized spraying operations. Each solenoid valve 312 is connected to the hydraulic cylinder through an external pipe for centralized control. At the same time, the sensing component 315 is used to sense the distance between the nozzle 314 and the profile. The sensing component 315 can be a distance sensor or a vision recognition module. In use, the sensing component 315 can sense the distance between the nozzle 314 and the profile, and control the start and stop of the hydraulic cylinder through the controller, thereby extending and retracting the telescopic rod 313 to the corresponding position, and cooperating with the control of the opening and closing of the solenoid valve 312 to carry out spraying operations, so as to ensure that each nozzle 314 can effectively cover different positions of the profile, thus improving the spraying effect.

[0033] The hydraulic system and its corresponding control system mentioned above are common knowledge in this field, so I will not go into too much detail about their specific structure and working principle.

[0034] In one embodiment, the clamping and fixing assembly 4 includes a second displacement assembly mounted on the base 1. The second displacement assembly has two moving ends, and each moving end is provided with a clamping part 403.

[0035] In practice, the two moving ends of the second displacement component can drive the two clamping parts 403 to move closer or further apart, thereby clamping and fixing different positions of profiles of different shapes. This design facilitates subsequent spraying treatment. When it is necessary to treat the original clamping position of the profile, after the first full spraying, the staff can cooperate to briefly loosen the clamping part 403, move the profile slightly to change the clamping point, and then spray the previously blocked part, making the spraying operation more flexible and comprehensive.

[0036] In one embodiment, a groove in the shape of a strip is provided on the base 1, and the second displacement component includes two sets of sliders 401 that are slidably installed in the groove. A linear guide 402 with a power source is also installed on the base 1. The linear guide 402 includes a bidirectional lead screw with two sections of threads in opposite directions. The two sets of sliders 401 are respectively screwed onto the two sections of threads of the bidirectional lead screw.

[0037] In practice, when the linear guide 402 is working, it can drive the two sets of sliders 401 to move towards or away from each other.

[0038] In one embodiment, the clamping part 403 includes a mounting plate 4031 mounted on the slider 401. A fixed platform 4032 is mounted on the mounting plate 4031. A semi-circular insertion slot is provided on the fixed platform 4032. A toothed ring 4033 with a notch is rotatably mounted on the fixed platform 4032 at the corresponding insertion slot. A gear 4034 that meshes with the toothed ring 4033 is rotatably mounted on the fixed platform 4032. A servo motor 4035 capable of driving the gear 4034 to rotate is mounted on the fixed platform 4032. Supports 4036 are mounted on the inner walls of opposite sides of the toothed ring 4033. A gripper cylinder 4037 is mounted on each support 4036.

[0039] In practice, by starting the servo motor 4035, the gear 4034 drives the notched gear ring 4033 to rotate to the corresponding angle, so that the gripper cylinder 4037 on the gear ring 4033 can rotate synchronously, and the profile can pass through the notch and move between the two gripper cylinders 4037. The gripper cylinder 4037 can be started to clamp the profile. The moving end of the gripper cylinder 4037 can be equipped with a corresponding type of clamp.

[0040] In one embodiment, two symmetrically distributed suction components 5 are installed on the base 1, which are used to suck up and collect excess passivation coating medium during spraying.

[0041] In practice, the suction assembly 5 includes a filter layer, a suction pump, and a storage chamber, which is located below the profile installation location. Therefore, when the suction assembly 5 is working, it can suck up excess paint into its storage chamber, which facilitates subsequent reuse and reduces environmental pollution.

[0042] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0043] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0044] Additionally, "multiple" refers to two or more.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for uniformly passivating and coating the surface of aluminum alloy profiles, characterized in that, include: A base (1) is provided with a first displacement component (2), which is capable of reciprocating along the X-axis direction of the base (1). At least one coating component (3) includes a mounting part, a spraying part and a locking part. The number of mounting parts is three and they are arranged in a gate shape on the first displacement component (2). The locking part is arranged on the spraying part and can drive the spraying part to move to the corresponding position of the mounting part and lock it in place. The spraying part is used to spray the treatment medium onto the profile arranged on the base (1) to complete the passivation coating treatment on the surface of the profile. The clamping and fixing component (4) is disposed on the base (1) and has two clamping ends that can be close to or far from each other, and can also drive the profile to rotate and adjust after clamping it.

2. The aluminum alloy profile surface passivation and uniform coating device according to claim 1, characterized in that: The first displacement component (2) includes a first drive unit (201) disposed on the base (1), the base (1) is provided with a slide (202) that can slide along its X-axis direction, and the slide (202) is provided with a gantry (203) that can slide along its Z-axis direction. A linear module (204) is vertically arranged on the slide (202), and the gantry (203) is arranged at the moving end of the linear module (204).

3. The aluminum alloy profile surface passivation and uniform coating device according to claim 2, characterized in that: The mounting part includes a plurality of mounting guide rails (301) respectively installed on the inner walls and the inner top wall of opposite sides of the gantry frame (203). An inlet and outlet (302) is provided on one side of the mounting guide rail (301) for the locking part to enter and exit. A first rack (303) is also provided in the mounting guide rail (301) along its length direction.

4. The aluminum alloy profile surface passivation and uniform coating device according to claim 3, characterized in that: The mounting rails (301) on the gantry (203) are all staggered.

5. The aluminum alloy profile surface passivation and uniform coating device according to claim 3, characterized in that: The locking part includes a mounting block (304), which can pass through the corresponding inlet and outlet (302) and slide into the corresponding mounting guide rail (301). The mounting block (304) is provided with an adjustment groove, and a second rack (305) is slidably provided in the adjustment groove. An abutment strip (306) is also slidably inserted in the adjustment groove. The second rack (305) has an inclined surface on the side near the abutment strip (306). The abutment strip (306) can move and abut against the corresponding inclined surface of the second rack (305), so that the second rack (305) slides towards the side near the first rack (303). An operating lever (307) is rotatably mounted on the abutment strip (306). The operating lever (307) rotates at a 90-degree angle. A lock cylinder (308) is mounted on one end of the operating lever (307). An operating groove (309) and a locking groove (310) are provided in the mounting block (304) and are interconnected. One end of the operating lever (307) can slide and extend into the operating groove (309), and the lock cylinder (308) can simultaneously slide into the locking groove (310). The operating lever (307) can also drive the lock cylinder (308) to rotate 90 degrees in the locking groove (310) to a locked position.

6. The aluminum alloy profile surface passivation and uniform coating device according to claim 5, characterized in that: Both the abutment bar (306) and the operating lever (307) are provided with locking holes (311). When the operating lever (307) is rotated 90 degrees to the locked position, the locking hole (311) on it is aligned with the locking hole (311) on the abutment bar (306).

7. The aluminum alloy profile surface passivation and uniform coating device according to claim 5, characterized in that: The spray unit includes a solenoid valve (312) mounted on the mounting block (304). A telescopic rod (313) is provided at the output end of the solenoid valve (312). The solenoid valve (312) can cooperate with an external pipe and a hydraulic cylinder to drive the moving end of the telescopic rod (313) to extend and retract. The telescopic rod (313) is provided with a nozzle (314) and a sensing component (315) at its moving end.

8. The aluminum alloy profile surface passivation and uniform coating device according to claim 1, characterized in that: The clamping and fixing assembly (4) includes a second displacement assembly disposed on the base (1). The second displacement assembly has two moving ends, and each moving end is provided with a clamping part (403).

9. The aluminum alloy profile surface passivation and uniform coating device according to claim 8, characterized in that: The base (1) is provided with a groove in the shape of a strip. The second displacement component includes two sets of sliders (401) that are slidably disposed in the groove. The base (1) is also provided with a linear guide (402) with a power source. The linear guide (402) includes a bidirectional lead screw with two sections of threads in opposite directions. The two sets of sliders (401) are respectively screwed to the two sections of threads of the bidirectional lead screw. The clamping part (403) includes a mounting plate (4031) disposed on the slider (401). A fixed platform (4032) is disposed on the mounting plate (4031). A semi-circular insertion slot is provided on the fixed platform (4032). A toothed ring (4033) with a notch is rotatably disposed at the corresponding insertion slot of the fixed platform (4032). A gear (4034) that meshes with the toothed ring (4033) is rotatably disposed on the fixed platform (4032). A servo motor (4035) capable of driving the gear (4034) to rotate is disposed on the fixed platform (4032). Supports (4036) are provided on the inner walls of the opposite sides of the toothed ring (4033). A gripper cylinder (4037) is disposed on the support (4036).

10. The aluminum alloy profile surface passivation uniform coating device according to claim 1, characterized in that: The base (1) is provided with two symmetrically distributed air suction components (5), which are used to suck up and collect excess passivation coating medium during spraying.