The characteristics of oil marks on the surface of aluminum profiles reflect:
The oil stains on the aluminum profile are not wiped clean before aging. After aging, the watermark will be produced on the surface of the aluminum profile, which will appear dark spots and have a certain depth after oxidation.
Causes of oil marks on the surface of aluminum profiles:
1. The finished sawing oil stains are left on both ends of the aluminum profile, and the gloves are not clean or even sticky with graphite dust when the material is moved (lifted);
2. When the aluminum profile is stretched, the glove is dirty and the material is too long, and the sawing is not removed;
3. The gloves are dirty and leave a "mark" during the intermediate sorting;
4. Extrusion equipment and tools leaking oil traces (driving, lifting belt).
The method of eliminating oil marks on the surface of aluminum profile:
1. In the process of aluminum production, the gloves should be clean when lifting the aluminum alloy profile, and the oil stains should be wiped off in time;
2. When drawing aluminum, take proper materials;
3. Sorting materials, the gloves when lifting and moving materials and stretching and taking materials, the gloves when adding rods should be separated;
4. Pay attention to oil leakage of equipment and tools, and clean the paper cushion straps.
