Patent ID: 9120148
Filing Date: 2015-09-01
Classification: B22D

Abstract:
1. A pour tube for use in casting a stream of molten metal from an upstream position to a downstream position, the pour tube having a pour tube central longitudinal axis and comprising an inner surface defining a bore and a port distributor in fluid communication, and an outer surface having at least two exit ports, wherein each port has a straight central longitudinal axis, wherein the exit ports are in fluid communication with the port distributor, wherein the port distributor is located downstream of the bore, and wherein the port distributor has a greater radius with respect to the pour tube longitudinal axis than does the bore, and wherein the exit port central longitudinal axes do not intersect the pour tube longitudinal axis, and wherein the exit ports comprise an inner wall and an outer wall, each in communication with the port distributor and the outer surface, wherein the outer wall has a greater length than the inner wall, and wherein the exit ports are spaced regularly at a rotation angle theta around the periphery of the port distributor, and wherein the exit ports have a port width of at least wherein r theta is the rotation angle around the periphery of the port distributor occupied by the port, expressed in radians.