| 摘要 |
<p>The mold is equipped with a casting ring (6) which is formed by clamping together four generally rectilinear wall segments (8) that are, first, arranged like the sides of a picture frame about the rabbet (52) of a rectangular case (10), and then abutted together, sash-like, at their mitered ends (80), to form a ring, the casting surface (9) of which will produce the rectangular cross-sectional outline common to sheet ingot or the like, when molten metal is fed through the ring. The clamping action is produced by a set of screws (94) at the corners (10') of the case, and after the ring (6) is clamped about a pair of spaced, axially opposing lips (54) and (60) on the case and an annular plate (14) thereabove, the plate (14) is clamped to the top of the case, to secure the ring in place and seal the axial ends of the ring against fluid flow thereacross. This makes it possible, in turn, to fabricate the wall segments (8) from graphite or other fluid-permeable material.</p> |
