A bracket for aluminum alloy spraying

Abstract

This utility model discloses a hanging rack for aluminum alloy spraying, belonging to the field of aluminum alloy painting technology. It includes a frame and a sliding rail hook assembly. The frame is divided into three zones along its length: a waiting zone, a spraying zone, and a drying zone. The sliding rail hook assembly connects the three zones via linear sliding rails and is driven by a motor. Each zone has a continuous spiral guide plate on its inner wall, with multiple sets of air nozzles on the surface of the spiral guide plate. The axis of the air nozzles is set at a 30-45° angle to the direction of movement of the sliding rail hook assembly. A V-shaped liquid collection tank is provided at the bottom of the frame, with ultrasonic transducers evenly distributed on the inner wall of the tank. An inclined guide pipe is connected to the bottom of the liquid collection tank. This utility model effectively solves the problem that existing hanging racks with a single structure cannot provide sufficient airflow control and precise drying treatment, resulting in insufficient spraying efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy processing and spraying technology, specifically to a hanger for aluminum alloy spraying. Background Technology

[0002] In the surface treatment of aluminum alloy parts, spraying technology is a crucial method that significantly enhances the product's aesthetics and protective performance. Currently, most aluminum alloy spraying operations utilize single-structure hangers. Especially in high-precision spraying processes, precise airflow distribution and a well-designed airflow guidance system are required to ensure a uniform coating free of bubbles. While some intelligent hangers on the market achieve a degree of automation, they still lack sufficient airflow control and precise drying processes, resulting in insufficient spraying efficiency and product quality.

[0003] Therefore, there is an urgent need for a hanger for aluminum alloy spraying that can improve spraying efficiency and quality. Utility Model Content

[0004] The purpose of this invention is to overcome the aforementioned technical difficulties and provide a bracket for aluminum alloy spraying that can improve spraying efficiency and quality.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a hanging rack for aluminum alloy spraying, comprising a frame and a sliding rail hook assembly. The frame is divided into three zones along its length: a waiting zone, a spraying zone, and a drying zone. The sliding rail hook assembly connects the three zones through a linear sliding rail and is driven by a drive motor. Each zone has a continuous spiral guide plate on its inner wall. The surface of the spiral guide plate has multiple sets of air jets. The axis of the air jets is set at an angle of 30-45° with the movement direction of the sliding rail hook assembly. A V-shaped liquid collection tank is provided at the bottom of the frame. Ultrasonic transducers are evenly distributed on the inner wall of the tank. An inclined guide pipe is connected to the bottom of the liquid collection tank.

[0006] Furthermore, the aperture of the jet nozzle gradually narrows along the airflow direction, with an inlet diameter of 1.5-2 mm and an outlet diameter of 0.8-1.2 mm, and the spacing between the nozzles is 3-5 times the aperture.

[0007] Furthermore, the jet nozzle is connected to the main air supply manifold via a branch pipeline. The main air supply manifold is equipped with an independent temperature control module. The temperature control module outputs ambient temperature compressed air to the spraying area and hot air at 60-80℃ to the drying area.

[0008] Furthermore, the pitch P of the spiral guide plate and the width W of the frame satisfy P=0.6-0.8W, and the height of the guide plate is 1 / 8-1 / 6 of the frame height.

[0009] Furthermore, the ultrasonic transducer operates at a frequency of 28-40 kHz and a power density of 0.5 W / cm². 2 It conforms to the curved surface of the inner wall of the liquid collection tank.

[0010] Furthermore, the slide rail hook assembly slides with the I-beam track set on the top of the frame via rollers. The slide rail hook assembly includes rotatable hooks, and the hook surface is coated with a polytetrafluoroethylene varnish coating with a coating thickness of 50-80μm.

[0011] The aluminum alloy spraying bracket provided by this utility model has the following beneficial effects:

[0012] This invention divides the frame along its length into a waiting area, a spraying area, and a drying area. Each area is equipped with continuous spiral guide plates, and the areas are connected by linear slide rails. This enables automated movement of the slide rail hooks, allowing for orderly processing of workpieces at different stages. It effectively guides airflow during spraying and drying, providing a uniform and suitable environment for the workpieces, significantly improving work efficiency and product quality. This effectively solves the problem of existing racks with a single structure that cannot provide sufficient airflow control and precise drying, resulting in insufficient spraying efficiency and product quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the aluminum alloy spraying bracket of this utility model.

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the frame of the aluminum alloy spraying bracket of this utility model.

[0015] Figure 3 This is a top view of the spiral guide plate of the aluminum alloy spraying bracket of this utility model.

[0016] In the diagram: 1. Frame; 2. Slide rail hook assembly; 3. Waiting area; 4. Spraying area; 5. Drying area; 6. Spiral guide plate; 7. Air nozzle; 8. Liquid collection tank; 9. Ultrasonic transducer; 10. Inclined guide pipe. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. The described embodiments are merely some, not all, of these embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0018] like Figure 1-3The present invention provides a hanging rack for aluminum alloy spraying, including a frame 1 and a sliding hook assembly 2. The frame 1 is 6m long. The sliding hook assembly 2 slides with the I-beam track on the top of the frame 1 via rollers. The sliding hook assembly 2 includes rotatable hooks with a polytetrafluoroethylene varnish coating on the surface, the coating thickness being 50-80μm. The frame 1 is divided into three zones along its length: a waiting zone 3, a spraying zone 4, and a drying zone 5. The sliding hook assembly 2 connects the three zones through a linear slide rail and is driven by a drive motor. The waiting zone 3 is 1.2m long and equipped with an electrostatic eliminator with an adjustable voltage of ±5kV. The spraying zone 4 is 3.6m long and operates at 25±2℃, equipped with 6 sets of conventional automatic spray guns. The drying zone 5 is 1.2m long and equipped with an infrared heating plate with a power density of 3W / cm2 and a heat dissipation fin structure. A PID temperature control module achieves a temperature control accuracy of ±1.5℃.

[0019] This application provides continuous spiral guide plates 6 on the inner walls of each zone, located on the upper inner wall of the frame 1. The pitch P of the spiral guide plate 6 and the width W of the frame 1 satisfy P=0.6-0.8W. The height of the guide plate is 1 / 8-1 / 6 of the height of the frame 1. Experiments show that when the height of the guide plate is increased to 1 / 6, the airflow velocity in the edge area can be increased by 40%, effectively improving the accumulation of coating at the edge. This application uses the spiral guide plate 6 in combination with multiple sets of jet nozzles 7 to form an airflow vortex within the frame 1. The spiral airflow forms a low-pressure vortex center, forcing the paint mist to move directionally towards the collection tank 8, thereby improving its settling rate.

[0020] The spiral guide plate 6 has multiple sets of air jets 7 on its surface. The axis of the air jets 7 is set at an angle of 30-45° with the movement direction of the slide rail hook assembly 2, so that it can form a turbulent mixing effect and make the paint particles more evenly distributed. The aperture of the air jets 7 gradually narrows along the airflow direction, with an inlet diameter of 1.5-2mm and an outlet diameter of 0.8-1.2mm. The spacing between the holes is 3-5 times the aperture. The air jets 7 are connected to the main air supply manifold through branch pipes. The main air supply manifold is equipped with an independent temperature control module. The temperature control module outputs room temperature compressed air to the spraying area 4 and 60-80℃ hot air to the drying area 5, which enhances convective heat transfer and reduces energy consumption.

[0021] The frame 1 described in this application has a V-shaped liquid collection tank 8 at its bottom, with ultrasonic transducers 9 evenly distributed on the inner wall of the tank. The ultrasonic transducers 9 effectively prevent the solidification of waste paint in the liquid collection tank 8. The bottom of the liquid collection tank 8 is connected to an inclined guide pipe 10. The ultrasonic transducers 9 have a working frequency of 28-40kHz and a power density of 0.5W / cm2, and conform to the curved surface of the inner wall of the liquid collection tank 8. Through comparative experiments, it was found that during the operation of the ultrasonic transducers 9, the comprehensive waste paint recovery rate was 89.2%; when the ultrasonic transducers 9 were turned off during the spraying process, the waste paint agglomeration rate was >40%, and the comprehensive waste paint recovery rate was 64.7%.

[0022] The applicant divided the same batch of aluminum alloy into two groups for spraying treatment. One group used a traditional hanger, and the other group used the hanger provided in this application. The testing was carried out according to GB / T13452.2-2008 standard. Nine test points were taken in each area. The uniformity of the coating was tested on the two groups of sprayed aluminum alloys using a BYK orange peel meter. The coating type was PPG ED6060 epoxy primer with a solid content of 68%. The spraying pressure was 0.35MPa±2%, and the ambient temperature and humidity were 25±1℃ / 50%RH±5%. The test results are as follows: for aluminum alloys sprayed with the traditional hanger, the uniformity was 0.8Ra / μm in the flat area, 2.1Ra / μm in the edge area, and 3.5Ra / μm in the R-corner area; for aluminum alloys sprayed with the hanger provided in this application, the uniformity was 0.3Ra / μm in the flat area, 0.5Ra / μm in the edge area, and 0.7Ra / μm in the R-corner area.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hanging bracket for aluminum alloy spraying, comprising a frame (1) and a slide rail type hook assembly (2), characterized in that: The frame (1) is divided into three zones along its length: a waiting zone (3), a spraying zone (4), and a drying zone (5). The sliding hook group (2) is connected to the three zones through a linear sliding rail and is driven by a drive motor. Each zone has a continuous spiral guide plate (6) on its inner wall. The spiral guide plate (6) has multiple sets of air jets (7) on its surface. The axis of the air jets (7) is set at an angle of 30-45° with the direction of movement of the sliding hook group (2). The bottom of the frame (1) is provided with a V-shaped liquid collection tank (8). Ultrasonic transducers (9) are evenly distributed on the inner wall of the tank. The bottom of the liquid collection tank (8) is connected to an inclined guide pipe (10).

2. The aluminum alloy spray hanger of claim 1, characterized by: The aperture of the jet nozzle (7) gradually decreases along the airflow direction, with an inlet diameter of 1.5-2 mm and an outlet diameter of 0.8-1.2 mm. The spacing between the nozzles is 3-5 times the aperture.

3. The aluminum alloy spray hanger of claim 1, wherein: The jet nozzle (7) is connected to the main air supply manifold through a branch pipeline. The main air supply manifold is equipped with an independent temperature control module. The temperature control module outputs room temperature compressed air to the spraying area (4) and outputs 60-80℃ hot air to the drying area (5).

4. The aluminum alloy spray hanger of claim 1, wherein: The pitch P of the spiral guide plate (6) and the width W of the frame (1) satisfy P=0.6-0.8W, and the height of the guide plate is 1 / 8-1 / 6 of the height of the frame (1).

5. The aluminum alloy spray hanger of claim 1, wherein: The ultrasonic vibrator (9) has a working frequency of 28-40 kHz and a power density of 0.5 W / cm 2 , and conforms to the inner wall curve of the collecting tank (8).

6. The aluminum alloy spray hanger of claim 1, wherein: The slide rail hook assembly (2) slides with the I-beam track set on the top of the frame (1) via rollers. The slide rail hook assembly (2) includes a rotatable hook, and the hook surface is coated with a polytetrafluoroethylene varnish coating with a coating thickness of 50-80μm.

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