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The main causes of particles on the surface of extruded aluminum profiles

What are the main causes of particles on the surface of extruded aluminum profiles? In the extrusion production of aluminum profiles, there are some small particles adsorbed on the surface of the profile to varying degrees, which feel tactile when touched, affecting the surface beauty of the oxidation, electrophoretic painting and spraying profiles, and reducing production efficiency and yield.

Therefore, it is necessary to analyze its formation mechanism in order to take measures to reduce or eliminate the occurrence of surface defects of this type of material. In the extrusion production of aluminum profiles, common defects are relatively intuitive, such as bending, twisting, deformation, slag inclusion, etc. The defect of “adsorbed particles” is difficult to detect without careful observation or touch.

The harm is: it is difficult to remove during the production process of electrophoresis and spray-painted profiles, affecting the appearance of the profiles and causing waste products.

Therefore, it is necessary to continuously observe and analyze in the practice of extrusion production, summarize its causes, and take timely measures to reduce or eliminate the occurrence of such defects. The influencing factors of “adsorbed particles” are mainly three aspects: mold, casting rod and extrusion process.

The operating level of the operator is also reflected in these three elements. On the basis of production practice, by constantly analyzing problems and summarizing experience, we can reduce or avoid “adsorbed particles”, aluminum sticking, rough surfaces, scratches, profiles Tear and other defects can greatly improve the yield and production efficiency of profiles.