Patents Assigned to Davy Distington Limited
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Patent number: 6176298Abstract: 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: GrantFiled: June 10, 1999Date of Patent: January 23, 2001Assignee: Davy Distington LimitedInventor: John Huddart Watters
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Patent number: 6015006Abstract: 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: GrantFiled: October 23, 1997Date of Patent: January 18, 2000Assignee: Davy Distington LimitedInventors: Ian Cassels, James Nicholas Cooper
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Patent number: 5368089Abstract: 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: GrantFiled: September 11, 1992Date of Patent: November 29, 1994Assignee: Davy (Distington) LimitedInventors: Timothy Reynolds, Robert M. Perry, David A. Preshaw
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Patent number: 5348075Abstract: 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: GrantFiled: March 10, 1993Date of Patent: September 20, 1994Assignee: Davy (Distington) LimitedInventors: Robert M. Perry, Timothy Reynolds, Thomas Hope, Kenneth T. Lawson
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Patent number: 5188167Abstract: 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: GrantFiled: January 29, 1991Date of Patent: February 23, 1993Assignee: Davy (Distington) LimitedInventors: Robert M. Perry, Timothy Reynolds
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Patent number: 5188166Abstract: 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: GrantFiled: December 18, 1991Date of Patent: February 23, 1993Assignee: Davy (Distington) LimitedInventor: Robert M. Perry
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Patent number: 4883114Abstract: 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: GrantFiled: January 24, 1989Date of Patent: November 28, 1989Assignees: Clecim, Davy (Distington) Limited, Sumitomo Heavy Industries Ltd.Inventor: Manfred Wolf