| 摘要 |
A method and apparatus (10) for the continuous casting of hollow articles (12) provides for the removal of liquid metal (49) from a mold (20) concurrently with the withdrawal of the solidified article (12). Undesirable reaction products, such as oxides, sulfides, and ceramic compositions, are commonly included in cast articles, reducing the mechanical and physical properties of the article and producing a product of inferior quality. The problem is solved by continuously casting molten metal (16) in a vertically oriented mold (20) and draining the contaminate enriched liquid (49) from an upper end (24) of the mold (20), thereby washing undesirable impurities from the freezing zone resulting in a clean, dense hollow article (12) having superior properties. Seamless mechanical tubing suitable for oil field and hydraulic cylinder applications can be produced by this process.
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