Patent ID: 7874346
Filing Date: 2011-01-25
Classification: B22D,C22C,C22F,H01M,Y02E

Abstract:
1. A method for manufacturing non lead added anode zinc material having utility for manganese dry batteries comprising in order, at least the following steps: compounding a zinc alloy by melting zinc, 0.1 mass % or more and 0.7 mass % or less of bismuth, and optionally 0.0005 mass % or more and 0.05 mass % or less of magnesium, and other impurity elements inevitably contained in zinc in a melting furnace; and casting the compounded molten zinc alloy to a molded material in the form of a band by a casting system; and rolling the molded material in said form of a band to form a zinc alloy sheet by a rolling system; and punching the rolled zinc alloy sheet in a designated thickness into a designated shape by a punching system, wherein a temperature at the surface of the molded zinc alloy material in the form of a band is controlled to be 100° C. or more and 190° C. or less at the time of entering into said rolling, and in a cross section of the cast molded band, acicular crystals make up an area less than 10% of the area of said cross section.