Control device for controlling mold oscillation in a continuous casting machine

A control device for controlling horizontal oscillation on a mold into which molten metal is poured in a continuous casting machine, said mold having a mold frame;

• two long-side plates opposed with each other;
• and two short-side plates extending orthogonal to said long-side plates, each of said long-side plates being movably attached to said mold frame such that they can move horizontally through hydraulic cylinders and each of said hydraulic cylinders having a piston rod, wherein said control device comprising:
• position detecting means attached to said piston rod for detecting an actual position of said long-side plates to produce an actual horizontal position signal representing the detected actual position of said long-side plates;
• open-close control means connected to said position detecting means, supplied with a target horizontal position command, and given to a predetermined offset value, for producing a control signal by using said target horizontal position command, said actual horizontal position signal, and said predetermined offset value, said target horizontal position command representing a target horizontal position of said long-side plates and said target horizontal position varies from a target close position up to a target open position indicated as a function of time, said control signal indicating a deviation between said target horizontal position and said detected actual horizontal position, said open-close control means making said deviation to be equal to said predetermined offset value when said target horizontal position is equal to said target close position;
• and
• driving means, connected to said open-close control means and said hydraulic cylinders, for driving said hydraulic cylinders according to said control signal.