Patent ID: 9457397
Filing Date: 2016-10-04
CPC Classification: B22D

Claim Text:
1. A roll casting method, comprising: casting molten metal in a mold region delimited on a first side by a first casting roll rotating around a horizontal first axis of rotation; conveying a metal strand, created by solidification of the molten metal, out of the mold region; applying a liquid coolant to a surface of the first casting roll by a first cooling device via first coolant applying devices receiving the liquid coolant via first coolant lines, the liquid coolant being inert in respect of the molten metal and having a standard boiling point at normal air pressure of below 20° C. and an operating temperature at or below an operating boiling point related to an operating pressure applied to the liquid coolant; detecting an actual property of the first casting roll by a first sensor configured to observe a section of the first casting roll before the section makes contact with the molten metal and after the section has received the coolant in a rotation cycle of the first casting roll; and controlling the first cooling device by a control device determining, for each of a plurality of periodic cycles of a clock cycle time, a proportion of activation time of the first cooling device in the clock cycle time, as a function of the actual property and a corresponding target property, and activating the first cooling device accordingly throughout the cycles, the control device controlling the first cooling device such that the liquid coolant, after being applied to a surface portion of the first casting roll, is substantially entirely vaporized from the casting roll prior to the surface portion making next contact with the molten metal.