| 摘要 |
PURPOSE:To cast a pipe with less surface defects continuously without generation of cracks by maintaining the temp. on the wall surfaces of the hollow master mold and core of a mold for continuous casting of pipes in contact with molten metal at temp. higher than the solidifying temp. of casting metal. CONSTITUTION:Molten metal 8 is supplied into a mold and the height of the molten metal in the mold is maintained constant by means of a control valve 9 for melt surface. A heating element 2 is provided in the master mold 1 of said mold, and a heating element 4 is provided in a core 3 to maintain the temp. on the inside wall surfaces at the outside of the mold at temp. higher than the solidifying temp. of the casting metal. Further, the temp. of casting, the descending speed of a dummy pipe 5, etc. are controlled, and the pipe 5 is moved downward so that a pipe 11 is cast continuously under the outlet of the mold. By this method the pipe made of alloys which are heretofore difficult to produce pipes by plastic working is produced easily. |
