Patent ID: 6612361
Filing Date: 2003-09-02
Classification: B22D

Abstract:
An ingot mold (1) for continuous casting of molten metal for forming rectangular- or square-section steel billets, comprising a longitudinally elongated casting conduit (2) through which said molten metal flows and is cooled; said casting conduit (2) having a rectangular cross section, and being defined by a first (3) and a second (4) pair of parallel, side by side walls; said first (3) and said second (4) pair of walls being perpendicular to one another, and defining four inner edges (5);said casting conduit (2) comprising at least a first portion (8) having rounded inner edges (5) and an inner section varying gradually from a respective longitudinal first end (7), at which said molten metal is fed in, towards a respective longitudinal second end (11) opposite the first; wherein said at least a first portion (8) is provided with four funnel-shaped portions (12) which project transversely and are located at said four edges (5) defined by said pairs of walls (3, 4); said funnel-shaped portions (12) extending longitudinally from said first end (7) to said second end (11) of said at least a first portion (8) and tapering towards said second end (11), at which said at least a first portion (8) has a rectangular cross section with no projections; said variation in section of said at least a first portion (8) being determined by a corresponding continuous, gradual variation in the inner radius of curvature of said four funnel-shaped portions (12); said radius of curvature decreasing from a maximum value (R1) at said first end (7), to a minimum value (R2) at said second end (11).