Abstract: During ceramic casting for the production of a molten bath it is often observed that the fire-resistant material becomes eroded and/or solid oxide phases are deposited. Both phenomena interfere with the smooth outflow of the molten bath. The present invention is intended, therefore, to provide an outflow which is stable in shape even when a molten bath is passed through, especially in multiple-sequence casting. To this end, the invention provides for ceramic casting with an envelope (10, 14) which is at least partly external and an internal insert (11, 14, 53) at a distance from the envelope (10, 14), the insert ( b 11, 14, 53) and envelope being connected together.
Type:
Grant
Filed:
March 27, 1986
Date of Patent:
October 11, 1988
Assignee:
Chamotte- und Tonwerk Kurt Hagenburger
Inventors:
Klaus Hagenburger, Ernst Muller, Werner Schattner, Hans G. Rosenstock, Peter W. Valentin
Abstract: A compact and re-usable ingate device for transferring molten metal to a mold during casting employs a substantially unitary structure resembling a trapezoidal block of refractory material. Within the block are a generally cylindrical rotation chamber, an inlet channel which receives the molten metal and injects it tangentially into the rotation chamber, so that the metal swirls rapidly to separate nonmetallic inclusions, and an outlet channel which conveys the cleaned metal to the mold. The rotation chamber may have a bottom that is positioned below the opening to the outlet channel and walls which slope outward slightly from the bottom to at least the opening, so that inclusions and metal that has solidified at the bottom can be removed from the rotation chamber. Alternately the outlet channel may open into the bottom at an eccentric position, so that all of the molten metal will be drained.
Type:
Grant
Filed:
November 29, 1984
Date of Patent:
May 3, 1988
Assignees:
Chamotte- und Tonwerk Kurt Hagenburger, Georg Fischer Aktiengesellschaft
Inventors:
Ernst Muller, Hans D. Grabowski, Hans-Joachim Bohm, Adolf Trautwein