DOUBLING ROLLING METHOD FOR ALUMINUM FOIL

摘要

PURPOSE:To decrease the material rupture during rolling and the generation of pinholes in product foil by subjecting aluminum stocks for doubling rolling to a specific heat treatment then superposing the two sheets of the stocks and subjecting the same to the prescribed rolling. CONSTITUTION:The aluminum stocks (thin sheets) 5, 5 as the material to be rolled are delivered simultaneously from un-coilers 1 and 2 and after the stocks are superposed and rolled by rolling rolls 3, the rolled material is taken up by a coiler 4 and the product coil is thus produced. The waving 6 of the superposed surface of the product foil is decreased to prevent the rupture of the material during rolling in such a case and the aluminum stocks 5 for doubling rolling are subjected to the heat treatment (tempering) for 1-3 hours at 150-230 deg.C in order to decrease the generation of the pinholes. The waving 6 of the superposed surfaces is thereby effectively decreased. The satisfactory attainment of the purpose is not possible with the heat treatment under the conditions except the above-mentioned temp. range and time range.