Our originally developed aluminum materials have enabled us to implement cold forging for die-casting materials, which resulted in the efficient manufacture of aluminum products with non-casting nests and high accuracy. Parts name : Clutch drum Manufacturing process     Aluminum die-casting blank (patented ) Cold forging   Internal composition (1)ADC-10 (Casting) x100 A lot of casing nests. Small silicon crystallized. (2)New materials (Casting) x100 Casting nests reduced. Netting manganese compounds crystallized. (3)New materials (Casting) x100 Casting nests disappeared. Netting manganese compounds stratified by plastic flow. Soundness confirmed.   Comparison with conventional manufacturing process Weight     Copyright 2004 Kubota Iron Works Co., Ltd. All rights Reserved.