A surface treatment system and method for aluminum profiles based on a basket-based circulating conveyor.

Abstract

This invention provides a surface treatment system and method for aluminum profiles based on a cyclic conveying system using baskets. A sandblasting machine receives multiple aluminum profiles from an external conveyor and performs sandblasting on each profile individually. A basket loading unit receives empty baskets from an external conveyor and the multiple aluminum profiles from the sandblasting machine, loading the profiles into a full basket. A chemical treatment line simultaneously performs chemical treatment on the full basket of aluminum profiles. A control unit is connected to the sandblasting machine, the basket loading unit, and the chemical treatment line. This system and method achieves a reasonable combination of sandblasting on single aluminum profiles and simultaneous chemical treatment on multiple profiles, coordinating the two processes to meet the requirements of both sandblasting and chemical treatment, thereby improving the surface efficiency and quality of the aluminum profiles.

Description

Technical Field

[0001] This invention relates to the field of aluminum profile surface treatment technology, and in particular to a surface treatment system and method for aluminum profiles based on a basket-based circulating conveyor. Background Technology

[0002] Aluminum profiles are produced by hot extrusion of bars containing aluminum and other metallic elements. They possess advantages such as lightweight and high strength, and are widely used in various fields including construction, automotive manufacturing, medical devices, and chemical equipment. However, hot-extruded aluminum profiles are highly susceptible to corrosion in humid, saline, and dusty environments, resulting in the formation of an oxide film on the surface. This oxide film is porous, uneven, and discontinuous, and cannot serve as a protective layer for the aluminum surface. To improve the corrosion resistance of aluminum alloy surfaces and enhance their decorative and functional properties, surface treatment is essential before hot extrusion. This surface treatment process begins with sandblasting to remove impurities and sharp edges from the aluminum profile surface, followed by subsequent surface chemical treatments.

[0003] Currently, one method in aluminum profile surface treatment involves sandblasting individual aluminum profiles, followed by single-profile transport to a chemical treatment line for multiple chemical processes such as degreasing, alkaline etching, and sealing before output. However, the sandblasting process is relatively short, while the chemical treatment process is longer, making it difficult to coordinate the speeds of the two processes, resulting in low production efficiency. Furthermore, single-profile transport easily leads to surface wear and scratches, compromising surface quality. Another method involves stacking aluminum profiles on a hoisting frame and feeding them into a sandblasting machine. Multiple profiles are then transported to the chemical treatment line for further chemical treatment. While this increases production efficiency, the stacking of multiple profiles on the rack results in uneven sandblasting surfaces, and sand particles accumulate in the gaps between the profiles, hindering drainage and causing poor chemical treatment results and contamination of the chemical treatment line, ultimately failing to meet process requirements. Summary of the Invention

[0004] Based on this, the present invention provides an aluminum profile surface treatment system and method based on a basket-based circulating conveyor, which rationally combines sandblasting treatment of a single aluminum profile with simultaneous chemical treatment of multiple aluminum profiles, achieving coordinated operation of the two treatment processes to meet the process requirements of sandblasting and chemical treatment, and improving the surface efficiency and quality of aluminum profiles.

[0005] To achieve the above objectives, in a first aspect, the present invention provides an aluminum profile surface treatment system based on a basket-based circulating conveyor, comprising a sandblasting machine, a basket loading unit, a chemical treatment line, and a control unit. The sandblasting machine receives multiple aluminum profiles conveyed externally and performs sandblasting treatment on each; the basket loading unit receives empty baskets conveyed externally and the multiple aluminum profiles conveyed by the sandblasting machine, loading the multiple aluminum profiles into the same basket to form a full basket; the chemical treatment line simultaneously performs chemical treatment on the multiple aluminum profiles in the full basket; and the control unit is connected to the sandblasting machine, the basket loading unit, and the chemical treatment line.

[0006] Furthermore, the aluminum profile surface treatment system also includes a double-layer conveying unit, which includes an upper conveying roller conveyor and a lower conveying roller conveyor arranged at intervals and with the same direction. The upper conveying roller conveyor is configured to input empty baskets into the basket loading unit, and the lower conveying roller conveyor is configured to output fully loaded baskets from the chemical treatment line.

[0007] Furthermore, the aluminum profile surface treatment system also includes a crate sorting unit. The crate sorting unit is located at the front end of the double-layer conveyor unit and includes a gantry frame, a winch, and a hanger. The gantry frame spans above the upper and lower conveyor roller tracks, and a transverse guide rail is provided at the top, which is perpendicular to the direction of the upper and lower conveyor roller tracks. The winch slides on the transverse guide rail, and the hanger is connected to the output end of the winch and is adapted to the hanging ears of the crate.

[0008] Furthermore, the aluminum profile surface treatment system also includes an aluminum profile input unit and an empty basket conveying unit. The aluminum profile input unit is located at the input port of the sandblasting machine and is configured to input aluminum profiles into the sandblasting machine. The empty basket conveying unit is located at the input port of the loading unit and is configured to input empty baskets into the loading unit so as to load the sandblasted aluminum profiles into the loading unit.

[0009] Furthermore, the aluminum profile holding basket is provided with an upwardly extending support frame, and the support frame is provided with multiple layers of cantilever beams at vertical intervals. The basket loading unit is provided with a robotic arm device, which is configured to place the single aluminum profiles output by the sandblasting machine onto the cantilever beams of each layer.

[0010] Furthermore, the chemical treatment line is sequentially equipped with an oil removal station, an alkaline etching station, a neutralization station, an oxidation station, a sealing station, and a hot water washing station. The oil removal station is configured to simultaneously remove oil from multiple aluminum profiles in the holding basket; the alkaline etching station is configured to simultaneously alkali-etch multiple aluminum profiles in the holding basket; the neutralization station is configured to simultaneously neutralize multiple aluminum profiles in the holding basket; the sealing station is configured to simultaneously seal holes in multiple aluminum profiles in the holding basket; and the hot water washing station is configured to simultaneously wash multiple aluminum profiles in the holding basket with hot water.

[0011] Furthermore, a water washing station is set up between each adjacent work station. The water washing station includes a water washing spray seat adapted to the height of the cantilever beams of each layer of the holding basket, and is configured to simultaneously water wash multiple aluminum profiles loaded on the cantilever beams of each layer.

[0012] Furthermore, the chemical processing line also includes horizontal guide rails extending along the layout direction of each workstation. Lifting equipment is slidably mounted on the horizontal guide rails. Position sensors are respectively installed at each workstation along the horizontal guide rails. The control unit is configured to receive and control the horizontal movement and lifting of the fully loaded container based on the detection signals from the position sensors.

[0013] Furthermore, a feeding unit is provided between the input end and the crating unit of the chemical processing line, and a discharging unit is provided between the output end and the sorting unit. The feeding unit and the discharging unit are respectively equipped with displacement sensors to detect the movement of the fully loaded crates. The control unit is configured to receive and control the operation of the feeding unit and the discharging unit according to the detection signal of the displacement sensor.

[0014] To achieve the above objectives, in a second aspect, the present invention provides a surface treatment method for aluminum profiles based on a basket-based circulating conveying system, comprising the following steps:

[0015] S100. The sandblasting machine receives a single aluminum profile from the outside and performs sandblasting treatment on each of them;

[0016] S200. The upper conveyor roller conveyor conveys empty containers inward, and the container sorting unit sorts the conveyed empty containers to the loading unit.

[0017] S300. The loading unit receives an empty container and multiple sandblasted aluminum profiles, and loads the multiple aluminum profiles into the empty container to form a full container.

[0018] S400. The chemical processing line receives fully loaded baskets and simultaneously performs chemical processing on multiple aluminum profiles on them.

[0019] S500. The basket sorting unit transports the fully loaded baskets output from the chemical processing line to the lower conveyor roller conveyor, which outputs the fully loaded baskets outward.

[0020] Compared with existing methods of aluminum profile sandblasting and subsequent chemical treatment, the technical advantages of the aluminum profile surface treatment system and method based on the circulating conveying of baskets provided by this invention are at least reflected in the following aspects:

[0021] 1. The loading unit receives empty baskets and multiple aluminum profiles undergoing sandblasting in the sandblasting machine. The loading unit loads the multiple aluminum profiles into the controlled basket to form a full-load basket. Then, the full-load baskets are transported and various chemical treatment operations are carried out on the chemical treatment line. The two treatment processes are coordinated and reasonably combined to meet the process requirements of sandblasting and chemical treatment, thereby improving the efficiency and quality of aluminum profile surface treatment.

[0022] 2. The upper conveyor roller conveyor of the double-layer conveyor unit conveys empty containers inward. The container sorting unit sorts the empty containers to the loading unit. At the same time, the container sorting unit conveys the full containers output from the chemical processing line to the lower conveyor roller conveyor for outward output. The above process automatically realizes the input of the required empty containers and the output of the processed full containers, which improves the degree of automation and system efficiency and reduces the space occupied by the conveyor.

[0023] 3. In the chemical processing line, the control unit receives and controls the horizontal movement and lifting of the fully loaded container based on the detection signals from the position sensor. This process involves degreasing, alkaline etching, neutralization, oxidation, sealing, and hot water washing of multiple aluminum profiles within the container. The system is highly automated and meets the needs of mass surface treatment of aluminum profiles. Attached Figure Description

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the aluminum profile surface treatment system based on the circulating conveying of baskets.

[0026] Figure 2 The working principle diagram of the aluminum profile surface treatment system based on the circulating conveying of baskets is provided.

[0027] Figure 3 Schematic diagram of the double-layer circulating conveyor unit and the crate sorting unit;

[0028] Figure 4This is a schematic diagram showing the state of the double-layer circulating conveyor unit from the input of an empty basket to the output of a processed full basket;

[0029] Figure 5 This is a diagram showing the structure of a chemical processing line;

[0030] Figure 6 This is a flowchart of the surface treatment process for aluminum profiles based on the cyclic conveying of containers.

[0031] Explanation of reference numerals in the attached diagram:

[0032] 1-Double-layer conveyor unit, 11-Lower layer conveyor roller conveyor, 12-Upper layer conveyor roller conveyor;

[0033] 2- Basket sorting unit;

[0034] 3-Empty basket conveying unit;

[0035] 4-Bagging unit;

[0036] 5-Aluminum profile input unit;

[0037] 6-Sandblasting machine;

[0038] 7-Feeding unit;

[0039] 8-Chemical treatment line, 81-Degreasing station, 82-Alkali etching station, 83-Neutralization station, 84-Oxidation station, 85-Sealing station, 86-Hot water washing station;

[0040] 9-Feeding unit;

[0041] a-Aluminum profile, c1-Empty holding basket, c2-Fully loaded holding basket. Detailed Implementation

[0042] Currently, in the surface treatment of aluminum profiles, one method involves sandblasting individual aluminum profiles and then conveying them individually to a chemical treatment line for multiple chemical processes, including degreasing, alkaline etching, and sealing, before final output. Another method involves stacking aluminum profiles on a hoisting frame and feeding them into a sandblasting machine, followed by multiple profiles being sent to a chemical treatment line for further chemical processing. These two processes are difficult to coordinate in terms of speed, resulting in low production efficiency, difficulty in guaranteeing surface quality, and inability to meet process requirements.

[0043] Therefore, this invention provides an aluminum profile surface treatment system and method based on a circulating conveyor basket. A sandblasting machine receives multiple aluminum profiles from an external conveyor and performs sandblasting treatment on each. A basket loading unit receives empty baskets from an external conveyor and the multiple aluminum profiles from the sandblasting machine, loading the multiple aluminum profiles into the same basket to form a full-load basket. A chemical treatment line simultaneously performs chemical treatment on the multiple aluminum profiles in the full-load basket. This achieves a reasonable combination of sandblasting treatment of single aluminum profiles and simultaneous chemical treatment of multiple aluminum profiles, coordinating the two treatment processes to meet the process requirements of sandblasting and chemical treatment, thereby improving the surface efficiency and quality of the aluminum profiles.

[0044] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The description of exemplary embodiments is merely illustrative and is in no way intended to limit the scope of this disclosure or its application or use. This disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully express the scope of this disclosure to those skilled in the art.

[0045] like Figure 1 and Figure 2 As shown, this invention provides an aluminum profile surface treatment system based on a basket-based circulating conveyor, comprising: a sandblasting machine 6, a basket loading unit 4, a chemical treatment line 8, and a control unit. The sandblasting machine 6 receives multiple aluminum profiles a from an external conveyor and performs sandblasting treatment on each; the basket loading unit 4 receives an empty basket c1 from an external conveyor and the multiple aluminum profiles a from the sandblasting machine 6, loading the multiple aluminum profiles a into the same basket to form a full-load basket; the chemical treatment line 8 simultaneously performs chemical treatment on the multiple aluminum profiles a in the full-load basket c2; the control unit is connected to the sandblasting machine 6, the basket loading unit 4, and the chemical treatment line 8.

[0046] Based on the provided aluminum profile surface treatment system, the loading unit 4 receives an empty holding basket c1 and multiple aluminum profiles a that are being sandblasted in the sandblasting machine 6. The loading unit 4 loads the multiple aluminum profiles into the controlled holding basket to form a full holding basket c2. Then, in the chemical treatment line 8, the full holding baskets c2 are used as units for conveying and various chemical treatment operations. This achieves a reasonable combination of sandblasting treatment of single aluminum profiles and simultaneous chemical treatment of multiple aluminum profiles, coordinating the two treatment processes, meeting the process requirements of sandblasting and chemical treatment, and improving the efficiency and quality of aluminum profile surface treatment.

[0047] like Figure 1 , Figure 3 and Figure 4As shown, the aluminum profile surface treatment system further includes a double-layer conveying unit 1. The double-layer conveying unit 1 includes an upper conveying roller conveyor 12 and a lower conveying roller conveyor 11 arranged at intervals and with the same direction. The upper conveying roller conveyor 12 is configured to input empty baskets c1 into the basket loading unit 4, and the lower conveying roller conveyor 11 is configured to output fully loaded baskets c2 from the chemical treatment line 8. The aluminum profile surface treatment system also includes a basket sorting unit. The basket sorting unit is located at the front end of the double-layer conveying unit 1 and includes a gantry frame, a winch, and a hanger. The gantry frame spans above the upper conveying roller conveyor 12 and the lower conveying roller conveyor, and a transverse guide rail is provided at the top, perpendicular to the direction of the upper conveying roller conveyor 12 and the lower conveying roller conveyor 11. The winch slides on the transverse guide rail, and the hanger is connected to the output end of the winch and is adapted to the hanging ears of the basket.

[0048] Based on the provided double-layer conveying unit 1, the upper conveying roller 12 of the double-layer conveying unit 1 conveys empty containers c1 inward. The containers sorting unit 2 sorts the conveyed empty containers c1 to the loading unit 4. At the same time, the containers sorting unit 2 conveys the full containers c2 output from the chemical treatment line 8 to the lower conveying roller 11. The lower conveying roller 11 outputs the full containers c2 outward. The above process automatically realizes the input of empty containers c1 required by the aluminum profile surface treatment system and the output of the processed full containers c2, which improves the automation level and system efficiency of the surface treatment process and reduces the occupancy of the conveying space.

[0049] like Figure 1 and Figure 2 As shown, the aluminum profile surface treatment system further includes an aluminum profile input unit 5 and an empty basket conveying unit 3. The aluminum profile input unit 5 is located at the input port of the sandblasting machine 6 and is configured to input aluminum profile a into the sandblasting machine 6. The empty basket conveying unit 3 is located at the input port of the loading unit 4 and is configured to input an empty container c1 into the loading unit 4 so as to load the sandblasted aluminum profile a into the loading unit 4.

[0050] like Figure 6 As shown, based on the provided aluminum profile surface treatment system, this invention provides an aluminum profile surface treatment method based on the circulating conveying of a holding basket, comprising the following steps:

[0051] S100. The sandblasting machine 6 receives multiple aluminum profiles a from the outside and performs sandblasting treatment on them respectively;

[0052] S200. The upper conveyor roller conveyor 12 conveys empty containers c1 inward, and the containers sorting unit sorts the conveyed empty containers c1 to the loading unit 4.

[0053] S300. The loading unit 4 receives an empty container c1 and multiple sandblasted aluminum profiles, and loads the multiple aluminum profiles a into the empty container c1 to form a full container c2.

[0054] S400. Chemical processing line 8 receives a fully loaded container c2 and simultaneously performs chemical processing on multiple aluminum profiles a on it;

[0055] S500. The basket sorting unit transports the full-load baskets c2 output from the chemical processing line 8 to the lower conveyor roller 11, and the lower conveyor roller 11 outputs the full-load baskets c2 outward.

[0056] Based on the provided aluminum profile surface treatment method, a sandblasting machine receives multiple aluminum profiles from an external source and performs sandblasting treatment on each; a crating unit receives an empty crate from an external source and the multiple aluminum profiles from the sandblasting machine, loading the multiple aluminum profiles into the same crate to form a full crate; a chemical treatment line simultaneously performs chemical treatment on the multiple aluminum profiles in the full crate. This achieves a reasonable combination of sandblasting treatment of single aluminum profiles and simultaneous chemical treatment of multiple aluminum profiles, coordinating the two treatment processes to meet the process requirements of sandblasting and chemical treatment, and improving the surface efficiency and quality of aluminum profiles.

[0057] like Figure 5 As shown, in some embodiments, the chemical processing line 8 is sequentially equipped with an oil removal station 81, an alkaline etching station 82, a neutralization station 83, an oxidation station 84, a sealing station 85, and a hot water washing station 86. The oil removal station 81 is configured to simultaneously degrease multiple aluminum profiles in the holding basket; the alkaline etching station 82 is configured to simultaneously alkali-etch multiple aluminum profiles in the holding basket; the neutralization station 83 is configured to simultaneously neutralize multiple aluminum profiles in the holding basket; the sealing station 85 is configured to simultaneously seal multiple aluminum profiles in the holding basket; and the hot water washing station 86 is configured to simultaneously wash multiple aluminum profiles in the holding basket with hot water. Furthermore, a water washing station is provided between each adjacent station. The water washing station includes a water washing spray base adapted to the height of the cantilever beams of each layer of the holding basket, and is configured to simultaneously wash multiple aluminum profiles mounted on the cantilever beams of each layer. Enables automated batch processing and improves surface quality.

[0058] In some embodiments, the aluminum profile holding basket is provided with an upwardly extending support frame, and the support frame is provided with multiple layers of cantilever beams at vertical intervals. The basket loading unit 4 is provided with a robotic arm device, which is configured to place the single aluminum profile a output by the sandblasting machine 6 onto each layer of cantilever beams. The material of the holding basket can be a polymer plastic, such as PE, PA, etc., which has good acid and alkali resistance, corrosion resistance, and does not participate in the surface treatment reaction.

[0059] Furthermore, the chemical processing line 8 also includes a horizontal guide rail extending along the arrangement direction of each workstation. A hoisting device is slidably mounted on the horizontal guide rail. Position sensors are respectively installed on the horizontal guide rail at each workstation. The control unit is configured to receive and control the horizontal movement and lifting of the fully loaded container c2 according to the detection signals of the position sensors.

[0060] Furthermore, a feeding unit 7 is provided between the input end of the chemical processing line 8 and the crate loading unit 4, and a discharging unit 9 is provided between the output end and the sorting unit. The feeding unit 7 and the discharging unit 9 are respectively equipped with displacement sensors to detect the movement of the fully loaded crate c2. The control unit is configured to receive and control the operation of the feeding unit 7 and the discharging unit 9 according to the detection signal of the displacement sensor.

[0061] Based on the above setup, a horizontal guide rail extends along the layout direction of each workstation in the chemical processing line, and a hoisting device slides on the horizontal guide rail. Position sensors are installed at each workstation on the horizontal guide rail. The control unit receives and controls the horizontal movement and lifting of the fully loaded container basket according to the detection signals of the position sensors. The process of degreasing, alkaline etching, neutralization, oxidation, sealing and hot water washing of multiple aluminum profiles in the container basket is carried out. The automation level is high, which meets the needs of mass surface treatment of aluminum profiles.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A surface treatment system for aluminum profiles based on a circulating conveyor system for holding baskets, characterized in that, include: The sandblasting machine (6) receives multiple aluminum profiles (a) from the outside and performs sandblasting treatment on each of them; The loading unit (4) receives an empty container (c1) from the outside and multiple aluminum profiles (a) from the sandblasting machine (6), and loads the multiple aluminum profiles (a) into the same container to form a full container. The chemical processing line (8) simultaneously chemically processes multiple aluminum profiles (a) of a fully loaded container (c2); as well as The control unit is connected to the sandblasting machine (6), the loading unit (4), and the chemical treatment line (8) for control purposes; The aluminum profile surface treatment system also includes a double-layer conveying unit (1). The double-layer conveying unit (1) includes an upper conveying roller (12) and a lower conveying roller (11) arranged at intervals and with the same direction. The upper conveying roller (12) is configured to input empty containers (c1) into the loading unit (4), and the lower conveying roller (11) is configured to output full containers (c2) from the chemical treatment line (8).

2. The aluminum profile surface treatment system based on the circulating conveying of holding baskets according to claim 1, characterized in that, The aluminum profile surface treatment system also includes a crate sorting unit. The crate sorting unit is located at the front end of the double-layer conveyor unit (1) and includes a gantry frame, a winch and a hanger. The gantry frame spans above the upper conveyor roller (12) and the lower conveyor roller, and a transverse guide rail is arranged at the top perpendicular to the direction of the upper conveyor roller (12) and the lower conveyor roller (11). The winch slides on the transverse guide rail, and the hanger is connected to the output end of the winch and is adapted to the hanging ears of the crate.

3. The aluminum profile surface treatment system based on the circulating conveying of holding baskets according to claim 1, characterized in that, The aluminum profile surface treatment system also includes an aluminum profile input unit (5) and an empty basket conveying unit (3). The aluminum profile input unit (5) is located at the input port of the sandblasting machine (6) and is configured to input aluminum profiles (a) into the sandblasting machine (6). The empty basket conveying unit (3) is located at the input port of the loading unit (4) and is configured to input empty baskets (c1) into the loading unit (4) to load the sandblasted aluminum profiles (a) into the loading unit (4).

4. The aluminum profile surface treatment system based on the circulating conveying of holding baskets according to claim 2, characterized in that, The basket body is provided with an upwardly extending support frame, and the support frame is provided with multiple layers of cantilever beams at vertical intervals. The basket loading unit (4) is provided with a robotic arm device, which is configured to place the single aluminum profile (a) output by the sandblasting machine (6) onto each layer of cantilever beams.

5. The aluminum profile surface treatment system based on the circulating conveying of holding baskets according to any one of claims 1 to 4, characterized in that, The chemical processing line (8) is sequentially equipped with an oil removal station (81), an alkaline etching station (82), a neutralization station (83), an oxidation station (84), a sealing station (85), and a hot water washing station (86). The oil removal station (81) is configured to simultaneously remove oil from multiple aluminum profiles in the holding basket; the alkaline etching station (82) is configured to simultaneously alkali etch multiple aluminum profiles in the holding basket; the neutralization station (83) is configured to simultaneously neutralize multiple aluminum profiles in the holding basket; the sealing station (85) is configured to simultaneously seal multiple aluminum profiles in the holding basket; and the hot water washing station (86) is configured to simultaneously wash multiple aluminum profiles in the holding basket with hot water.

6. The aluminum profile surface treatment system based on the circulating conveying of holding baskets according to claim 5, characterized in that, Each adjacent workstation is equipped with a water washing station, which includes a water washing spray station adapted to the height of the cantilever beams of each layer of the holding basket, and is configured to simultaneously water wash multiple aluminum profiles mounted on the cantilever beams of each layer.

7. The aluminum profile surface treatment system based on the circulating conveying of holding baskets according to claim 5, characterized in that, The chemical processing line (8) also includes a horizontal guide rail extending along the arrangement direction of each work station. A hoisting device is slidably mounted on the horizontal guide rail. A position sensor is installed on each work station along the horizontal guide rail. The control unit is configured to receive and control the horizontal movement and lifting of the fully loaded container (c2) according to the detection signal of the position sensor.

8. The aluminum profile surface treatment system based on the circulating conveying of holding baskets according to claim 7, characterized in that, The chemical processing line (8) is provided with a feeding unit (7) between the input end and the crating unit (4) and a discharging unit (9) between the output end and the sorting unit. The feeding unit (7) and the discharging unit (9) are respectively provided with displacement sensors to detect the movement of the fully loaded crates (c2). The control unit is configured to receive and control the feeding unit (7) and the discharging unit (9) according to the detection signal of the displacement sensor.

9. A surface treatment method for aluminum profiles based on the circulating conveying of crates, using the aluminum profile surface treatment system based on the circulating conveying of crates as described in any one of claims 1 to 8, characterized in that, Including the following steps: S100. The sandblasting machine (6) receives multiple aluminum profiles (a) from the outside and performs sandblasting treatment on each of them; S200. The upper conveyor roller (12) conveys empty containers (c1) inward. The aluminum profile surface treatment system also includes a container sorting unit, which sorts the conveyed empty containers (c1) to the loading unit (4). S300. The loading unit (4) receives an empty container (c1) and multiple sandblasted aluminum profiles, and loads the multiple aluminum profiles (a) into the empty container (c1) to form a full container (c2). S400. Chemical processing line (8) receives a full-load container (c2) and simultaneously chemically processes multiple aluminum profiles (a) on it; S500. The basket sorting unit transports the full-load baskets (c2) output from the chemical processing line (8) to the lower conveyor roller (11), and the lower conveyor roller (11) outputs the full-load baskets (c2) outward.

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