Patents Assigned to Davy Distington Limited
  • Patent number: 6176298
    Abstract: A continuous casting mould wall (1, 2) has a non-metallic coating (5) thereon the thickness of which is different at first and third regions (6, 9) closer to the inlet and outlet ends respectively of the mould passage (3), from that at a second region (8), whereby the meniscus of molten metal can be in the first region (6) and solidification can commence in contact with the first or second regions (6, 8), whilst the solidifying casting passes through the third region (9) with reduced wear on the mould.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: January 23, 2001
    Assignee: Davy Distington Limited
    Inventor: John Huddart Watters
  • Patent number: 6015006
    Abstract: A continuous casting mould comprises a fixed part (2) and a moveable part (1) and the latter includes means defining the mould passage. The moveable part is displaced relative to the fixed part generally in the direction of casting. The moveable part (1) is guided relative to the fixed part (2) by a plurality of guidance elements (4) each of which has a pair of opposit faces (6) which are arcuate convex form. The faces of each element are urged into abutting relation with cooperating surfaces on the fixed and moveable parts to allow rocking of the element relative to the surface.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: January 18, 2000
    Assignee: Davy Distington Limited
    Inventors: Ian Cassels, James Nicholas Cooper
  • Patent number: 5368089
    Abstract: The device comprises a body of thermally conductive material having an upper part through which liquid coolant is passed and a lower part which is submerged in the molten metal to be cooled. The lower part has a dimension which is greater than the corresponding dimension in a higher horizontal cross-sectional plane so that a skull of solidified metal is locked to the body by extending around the greater dimension.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: November 29, 1994
    Assignee: Davy (Distington) Limited
    Inventors: Timothy Reynolds, Robert M. Perry, David A. Preshaw
  • Patent number: 5348075
    Abstract: In the manufacture of thin metal slab, a workpiece is cast in a continuous casting mould but, while still connected to the part within the mould, the workpiece is treated differently across its width to produce slab of a different width from the east workpiece and of uniform cross-section. The treatment may be rolling or forging.
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: September 20, 1994
    Assignee: Davy (Distington) Limited
    Inventors: Robert M. Perry, Timothy Reynolds, Thomas Hope, Kenneth T. Lawson
  • Patent number: 5188167
    Abstract: A continuous casting mould for casting thin slabs has, at its inlet end, a mould cavity which has generally rectangular side regions joined by a central pouring region. At least part of the walls of the pouring region are of arcuate form and over at least part of the depth of the mould the radii of curvature of the arcuate parts progressively increase.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: February 23, 1993
    Assignee: Davy (Distington) Limited
    Inventors: Robert M. Perry, Timothy Reynolds
  • Patent number: 5188166
    Abstract: A twin roll strip casting machine has an edge containment assembly abutting against opposite ends of the rolls. Each assembly has a face portion of refractory material supported by a backing plate. The assemblies are oscillated at up to ultrasonic frequencies in directions parallel to the direction of casting with the face portions urged into contact with the ends of the roll barrels.
    Type: Grant
    Filed: December 18, 1991
    Date of Patent: February 23, 1993
    Assignee: Davy (Distington) Limited
    Inventor: Robert M. Perry
  • Patent number: 4883114
    Abstract: Steel is teemed into one end of a continuous casting mold to form a continuously cast strand which is withdrawn through the other end of the mold. The mold is oscillated and the strand is accelerated through a first range of speeds less than 1.2 meter per minute and a second range of speeds greater than this value. As the strand accelerates through the first range, the oscillation frequency is increased from a value between 60 and 120 cycles per minute to a value between 120 and 200 cycles per minute while holding the stroke constant. On the other hand, when the strand accelerates through the second range, the oscillation frequency is maintained constant and the stroke is increased with strand speed. A condition of negative strip is maintained in both ranges and the time for which negative strip occurs during each oscillation cycle approximates 0.1 second.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: November 28, 1989
    Assignees: Clecim, Davy (Distington) Limited, Sumitomo Heavy Industries Ltd.
    Inventor: Manfred Wolf