[China Aluminum Network] Aluminium surface damage is mainly caused by the presence of impurities on the surface of the ingot or segregation of ingot components. When a large amount of segregated precipitates are present on the surface of the ingot and the ingot is not homogenized or homogenized, the ingot has a certain amount of hard metal particles, and the metal flows through the working belt during the extrusion process. These segregated precipitates or hard metal particles adhere to the surface of the working belt or cause damage to the working belt, resulting in scratches on the surface of the profile.
2 There are debris on the mold cavity or working belt, the working belt hardness of the mold is low, so that the work belt surface is injured when the extrusion and scratches the profile;
3 The exposed metal or graphite bars in the discharge track or oscillating plate have hard inclusions, which cause scratches on the surface of the profile when they come into contact with the profiles;
4 When the fork bar is sending the profile from the discharge rail to the swing bed, the profile is damaged due to excessive speed;
5 caused by artificial dragging profiles in the swing bed caused by scratches;
6 The friction or extrusion between the profiles causes damage during transport.
Solution 1 Strengthen the control of the quality of the ingot;
2 to improve the quality of mold repair, the mold periodically nitrided and strictly enforce the nitriding process;
3 Use soft felt to separate the profiles from the auxiliary tools to minimize the contact damage between the profiles and the auxiliary tools;
4 Handle with care in production, try to avoid arbitrarily dragging or turning profiles;
Aluminium profile surface damage causes and solutions 5 Reasonably arrange the profiles in the material box, try to avoid mutual friction.
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