Production method of aluminum foil
According to the development process of aluminum foil, the production methods of aluminum foil mainly include the following types: stack rolling method, strip rolling method and deposition method. We share the first two production methods today.
1.stack rolling method
The stack rolling method is a method of producing foil by using the multi-layer block stack rolling method, which is the foil production method used in the emergence of the two-roll rolling mill. The aluminum foil produced by the stack rolling method is prone to creasing, and the minimum thickness of the rolled is generally only 0.01 ~ 0.02mm, and the length of the rolled foil is short, and the production efficiency is low. At present, the stack rolling method is rarely used.
2.strip rolling method
The strip rolling method is the main method of aluminum foil production at present, and the aluminum foil produced by this method has accounted for more than 90%. In this method, the hot-rolled plate or the melt continuous casting and rolling plate is used as the aluminum foil wool. Aluminum foil wool is generally rolled into a simple material through 5 to 6 passes of cold rolling on a foil rolling mill. Generally, there is no annealing in the middle, and two or more layers of rolling are usually used in the last rolling pass. The main features of the strip rolling method are high production efficiency (rolling speed up to 2500m/min), good surface quality and uniform thickness. At present, the thinnest aluminum foil produced by this method can reach 0.005mm, and the width can reach 2000mm. Due to the improvement of the performance of the quadruple rolling mill, it is possible to carry out large-scale production of thin foil with a thickness of 4um, but the cost is not necessarily cost-effective.