压延和挤压用的大型铝锭的铸造,通常采用直接冷却法,即将金属浇入开底式的铸模中,而模的侧壁构成如所要求的铸锭横断面形状相似的孔型。铸锭已凝固的底部由最初停在模子底部位置的底座托着下降,其下降速度取决于所要求的铸造速度。现今常用的直接冷却连续铸造法生产铝锭时模壁是被冷却的,因此模壁与熔体相互接触 Casting of large aluminum ingots for calendering and extrusion is usually performed by a direct cooling method in which metal is poured into open-end molds and sidewalls of the molds are formed into a pattern of holes of a similar cross-sectional shape as the desired ingot. The solidified bottom of the ingot is lowered by the base initially parked at the bottom of the mold, the rate of which drops depending on the desired casting speed. The die wall is cooled when the aluminum ingot is produced by the direct cooling continuous casting method used today, so that the die wall and the melt contact each other