Patent ID: 6260740
Filing Date: 2001-07-17
Classification: B22D

Abstract:
A process for directing a flow of metallic liquid from a melt container to a stationary permanent mold through a first immersion nozzle part, an intermediate part, and a second immersion nozzle part of an immersion nozzle, the second immersion nozzle part having an elongated cross section with broad sides and narrow sides, said process comprising the steps of:a. reducing a central portion of the flow of metallic liquid at an inlet region of the second immersion nozzle part with respect to the broad sides of the second immersion nozzle part;b. increasing the angle of expansion of the flow of the metallic liquid at the inlet region for substantially preventing a return flow of the metallic liquid along the narrow sides of the second immersion nozzle part; andc. directing the flow upon leaving the second immersion nozzle part with a velocity profile of flow that is smaller toward the central portion of the second immersion nozzle part and larger toward the narrow sides of the second immersion nozzle part.