Industrial aluminum profile surface: causes of scratches, scratches and scratches:
1. Sundries on the surface of ingot
2. Ingot composition segregation, large amount of segregation floats on the surface
3. On the other hand, when the ingot is not homogenized or the homogenization effect is not good, there are a certain number of hard metal particles in the ingot. When the metal flows through the working belt during the extrusion process, these segregation floats or hard metal particles adhere to the surface of the working belt or cause damage to the working belt, and finally cause scratch on the surface of the profile.
4. There are sundries on the mold cavity or working belt, and the hardness of the mold working belt is low, so that the surface of the working belt is injured during extrusion and the profile is scratched;
5. There are exposed metal or hard inclusions in the graphite strip on the discharge track or swing bed. When it contacts with the profile, it will scratch the profile surface;
6. When the fork rod transfers the profile from the discharge rail to the swing bed, the profile is bruised due to the high speed;
7. Scratches caused by manually dragging profiles on the swing bed;
8. Damage caused by friction or extrusion between profiles during transportation.
