Please download the dossier by clicking on the dossier button x
×

Method and apparatus for counter-gravity casting of metal

  • US 6,467,532 B1
  • Filed: 12/18/2000
  • Issued: 10/22/2002
  • Est. Priority Date: 07/06/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of casting metal products by transferring molten metal from a furnace to a presented cavity of successive casting cavities of moulds in a mould string which mould string is advanced in unison, said method comprising the steps of:

  • generating a predetermined profile of molten metal level in the presented cavity as a function time during filling of the presented cavity;

    creating in the molten metal with a pressurizing device a pressure sufficient to lift the molten metal via a duct leading from the furnace to the presented cavity;

    controlling, with a closed-loop control arrangement, the pressurizing device to vary the pressure to ensure that the presented cavity is filled with molten metal in accordance with the predetermined profile, said controlling step including the step of deriving an input for the closed-loop control arrangement from a measured flow velocity of the molten metal taken from a sensor of a Venturi restriction in the duct in order to control the pressurizing device.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×