Continuous method and apparatus for upwards casting

• US 3,872,913 A
• Filed: 12/04/1970
• Issued: 03/25/1975
• Est. Priority Date: 12/15/1969
• Status: Expired due to Term

• Current Assignee: Timo Jorma Juhani Lohikoski
• Original Assignee: Timo Jorma Juhani Lohikoski
• Inventors: Lohikoski, Timo Jorma Juhani
• Primary Examiner(s): Annear, R. Spencer
• Application Number:
  US05/095,038
• Time in Patent Office: 1,572 Days
• Field of Search: 164/64,82,85,253,273R,281,283
• US Class Current: 164/474
• CPC Class Codes: B22D 11/145 for upward casting

Abstract

Melt is continuously drawn upwards from a supply of the melt by suction through a vertical graphite nozzle the upper portion of which is cooled to solidify the melt enough in the nozzle to endure pulling the solidified product upwards through a cooler having a cross-section which is somewhat greater than that of the product. Attached to a support above the melt supply there is a support for a vertical cooler having three pipes defining a tortuous flow passage therebetween the ends of which are provided with an inlet and an outlet for passing e.g. cooling water through the passage. The innermost tube of the cooler through which the product is pulled is of somewhat greater diameter than the product and has an opening at the upper part thereof to create suction inside the apparatus. Coaxially attached to and partially surrounded by the lower part of the cooler there is a graphite nozzle the lower end of which is immersed in the melt supply.

Claims

1. An improved continuous method of upwards casting of profiled products, such as bars, plates and pipes in which melt is sucked above the surface of the melt into a nozzle where it is solidified and then pulled upwards through a cooler to form a solidified product, the improvement comprising:

applying said upwards-directed suction on the melt through the nozzle which is partly immersed in the melt;

cooling the upper portion of the nozzle to solidify the product enough to endure pulling;

further cooling the product in the cooler above the nozzle; and

pulling the solidified product removed from the nozzle upwards by pulling means above the Cooler.

2. Apparatus for casting profiled products continuously upwards from a melt comprising:

a support above the melt;

a vertical cooler attached to the support and comprising three concentric pipes defining a passage therebetween having an inlet and an outlet for coolant medium, the innermost pipe having a greater cross-section than the product and an opening for creating suction inside said innermost pipe; and

a nozzle coaxially attached to and partially surrounded by the lower end of the cooler to cool the upper portion of the nozzle for conducting the metal from the melt and for forming a shaping surface for solidification of the melt.