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US 4,355,680 AGranted
Method and apparatus for continuous casting of hollow articles
AssigneeCaterpillar Tractor Co.
InventorJohn G. Frantzreb, Sr.
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AssigneeCaterpillar Tractor Co.
InventorJohn G. Frantzreb, Sr.
Estimating the term…
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.
A method for the continuous casting of hollow articles (12), comprising:
In an apparatus (10) for the continuous casting of hollow articles (12), said apparatus (10) having a vertically oriented mold (20), said mold having an upper end (24) and a lower end (22), a casting breech (36) in communication with the lower end (22) of said mold (20), means (38) for providing a supply of molten metal (16) to said casting breech (36), means (26) for cooling the mold (20), and means (44) for withdrawing a solidified hollow article (12) from the upper end (24) of said mold (20), the improvement comprising:
An apparatus (10) for the continuous casting of hollow articles (12), comprising:
Dependencies are inferred from the claim text.