Aluminium foil manufacturing process and thickness control

Aluminium foil manufacturing process consists of continuous casting steps and annealing between them. Due to its excellent properties, aluminium foil is widely used in food, beverages, cigarettes, pharmaceuticals, photographic bases, household daily necessities, etc., and is usually used as its packaging material; electrolytic capacitor materials; thermal insulation materials for buildings, vehicles, ships, houses, etc.; As a decorative gold and silver wire, wallpaper and various types of stationery printed matter and light industrial products, decorative trademarks. The rolling speed of the high-speed aluminum foil rolling mill is very high. As the rolling speed increases, the temperature of the rolling deformation zone increases. According to the calculation, the metal temperature of the deformation zone can rise to 200 ° C, which is equivalent to an intermediate recovery annealing. Process softening of rolled materials.
Aluminium foil manufacturing process and thickness control
The aluminium foil manufacturing process should be in accordance with the following principles:
1. Determination of the total processing rate
The total processing rate refers to the total deformation degree of the foil after the recrystallization annealing to the finished product. In general, the total processing rate of the 1 series can reach more than 99%, and some 8 series products can also reach this value, but the total processing rate of the aluminum alloy foil is generally below 90%.
2. Determination of the pass rate
The determination of the pass rate is the core of the aluminium foil rolling process. The pure aluminum series products can achieve a pass rate of 65%, and the first pass after the blank is annealed. The processing rate is generally about 50%.
Aluminium foil thickness can be divided into three levels: 0.1-0.2mm, 0.01-0.1mm and 0.005-0.009mm. Aluminium foil thickness measurement methods for rolling mainly include eddy current thickness measurement, isotope ray thickness measurement and X-ray thickness measurement. X-ray thickness measurement is one of the most common thickness measurement methods used in current aluminum foil production, especially in high speed aluminum foil rolling mills. Thickness control method for aluminium foil rolling includes rolling force control, tension control, rolling speed control, tension/speed and speed/tension control.

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