Patent ID: 6871693
Filing Date: 2005-03-29
Classification: B22D

Abstract:
1. A method of continuous casting of slabs and ingots, in particular, of thin slabs in a continuous casting installation including a soft reduction section in a strand guide under a mold and having pressure rollers and support rollers ( 3 , 4 ) which are continuously restrained relative to one another, either individually or as a segment ( 1 ) by hydraulic cylinders ( 7 , 7 ′), and are restrained by stops ( 30 ) in a limiting manner, the method comprising the steps of using a hard-pressure restraining force in an area of the soft reduction section of the strand guide in which the strand has not completely solidified, and using a soft-pressure restraining force in an area of the soft reduction section of the strand guide in which the strand has completely solidified; defining a pressure changeover value at which restraining with the hard-pressure restraining force is switched to restraining with the soft-pressure retaining force and vice versa; and applying the soft pressure restraining force when the pressure is above the changeover value, and applying the hard-pressure retaining force when the pressure is below the changeover value.