METALLIC SECTOR FOR VITRIFICATION COLD CRUCIBLE

摘要

The present invention relates to a metallic sector for a vitrification cold melting crucible having three cooling passages with different diameters. In the vitrification cold melting crucible including a melting space composed of a plurality of metallic sectors, a cross sectional area of a first cooling passage of the metallic sector formed into a single passage larger than a cross sectional area of a second cooling passage composed of at least two sub passage. In an existing cooling method, one or two cooling passages are formed in a metallic sector. However, the present invention is characterized by a fact that at least three cooling passages are formed in the metallic sector to enhance a cooling efficiency of the vitrification cold melting crucible with an enlarged size. The purpose of the present invention is to provide the metallic sector for the vitrification cold melting crucible wherein the cooling efficiency of the metallic sector is improved.