Causes and solutions of aluminum profile surface damage


Release time:

2022-03-03

Ingot surface debris or ingot composition segregation. When there is a large amount of segregation floating on the surface of the ingot and the ingot is not homogenized or the homogenization treatment effect is not good

1. main reason

surface

ingot surface is attached with debris or ingot composition segregation. When there are a large number of segregation floats on the surface of the ingot and 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 scratches on the surface of the profile;
Mold
There are sundries on the mold cavity or working belt, and the hardness of the working belt of the mold is low, which causes the surface of the working belt to be injured during extrusion and scratches the profile;

Production Equipment

① There are exposed metal or graphite strips with hard inclusions on the discharge track or pendulum bed, which will scratch the surface of the profile when contacting the profile;
② When the profile is fed from the discharge track to the pendulum bed by the fork rod, the profile is bruised due to too fast speed;
③ Drag the profile manually on the pendulum bed to cause scratches;
④ Friction or extrusion between the profiles during transportation causes damage.

2. Solution

① Strengthen the control of ingot quality;

② Improve the quality of mold repair. The mold is nitrided regularly and the nitriding process is strictly implemented.

③ Use soft felt to isolate the profile from the auxiliary tools to minimize the contact damage between the profile and the auxiliary tools;

④ Handle with care during production, and try to avoid dragging or turning the profile at will;

⑤ Place the profiles reasonably in the material frame to avoid mutual friction as much as possible.