For the thickness of less than 0.012mm (thickness size and the diameter of the work roll) of the very thin aluminum foil, due to the elasticity of the roll flattening, with a single rolling method is very difficult, so the use of double rolling method, that is, the middle of the two foils plus lubricant, and then rolled together for the rolling method (also known as the stacked rolling). Stack rolling can not only roll out the single sheet rolling can not produce very thin aluminum foil, but also can reduce the number of strip breaks, improve labor productivity, the use of this process can be mass-produced 0.006mm-0.03mm single-sided light aluminum foil.
(3) Speed effect. Aluminum foil rolling process, the foil thickness with the rolling system of the rise and thinning of the phenomenon known as the speed effect. For the explanation of the mechanism of the speed effect has yet to be in-depth study, the reasons for the speed effect is generally believed to have the following three aspects: 1) the work roll and rolling material section between the friction state changes, with looking at the rolling speed of the Bureau, the lubricating oil with the amount of people increased, so that the lubrication between the rolls and rolling material changes. The coefficient of friction decreases, the oil film becomes thicker, and the thickness of the aluminum foil is then thinned.
(2) changes in the rolling mill itself. The mill with cylindrical bearings, as the rolling speed increases, the roll neck will float in the bearing, thus making the two interacting loaded rolls will move in the direction of leaning against each other.
3) Processing softening when the material is deformed by rolling. High-speed aluminum foil rolling mill rolling speed is very high, with the increase in rolling speed, rolling deformation area of the temperature to open high, according to the calculation of the deformation area of the metal temperature can rise to 200 ℃, equivalent to an intermediate restoration of the annealing, thus giving rise to the processing of the rolled material softening phenomenon.