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Analysis on the causes of spotty defects that often appear on the surface of aluminum profiles

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Update time : 2023-01-04 19:58:12
Although the surface of aluminum profiles often appear spottled defects, but these defects occur in the extrusion process, especially the determination of process methods, parameters and so on is very important for the quality of aluminum profiles. On the one hand, the operation of aluminum extrusion die is very critical, and no defects can occur. Mold edge rough or size error, will affect the quality of aluminum profile. On the other hand, due to the influence of heat generated in aluminum profile welding, resulting in uneven tone problems. In the welding process, the surface in solid solution state sometimes forms a transparent oxide film with poor coloring, but the surface in precipitation state will form a colored oxide film with poor glossiness and transparency. Third, in the lathe, bending, milling and other mechanical processing, the cutting powder will be attached to the surface of the aluminum profile, easy to produce scratches. In order to avoid this damage as much as possible, you can use sandpaper for part of the processing.
In addition, sandblasting, grinding, grinding and other processing will occur local overheating, resulting in uneven tone and uneven. In order to avoid the scratching and bruising of aluminum profiles in packaging and transportation, attention should be paid to the packaging and transportation links to reduce unnecessary damage.
To sum up, there are many reasons for the surface spot defects of aluminum profiles. Several typical steps in the process of profile production are analyzed and elaborated. In the production process, only to find out the cause of surface spot defects, timely discover the problem, and actively solve, in order to improve the quality of aluminum profiles entering the market, the loss will be lower. In addition, the quality inspection department should also strictly check the product quality, in order to improve the overall quality of aluminum products.
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