The oil spot is the most common quality problem on the […]
The oil spot is the most common quality problem on the surface of aluminum foil. The main reason is that the rolling oil is mixed with the kinematic viscosity of oil or rolling oil. In addition, the outlet angle of the rolling mill is not correct, the wind pressure is too small, The oil on the net.
The solution is:
① prevent oil mixed with rolling oil;
② control the rolling viscosity of the rolling oil, not exceeding 2.34 × 10-6m2 / s;
③ cold days should be heated rolling oil;
④ control the addition of additives The amount of 5% -7%;
⑤ increased at the exit of the mill two air vents, the upper two tuyeres, the lower row of four tuyeres, blowing from both sides;
⑥ in the last rolling pass manual rub Foil off the surface of the oil;
⑦ aluminum annealing, at 200 ℃ to stay for some time, so that the full evaporation of rolling oil.