Zimmermann & Jansen Gmbh

Flo-con Systems, Inc.

Ludwig Walther

Josef Lothmann

Heinz D Hannes

Friedhelm Paulus

A method and apparatus of controlling the pouring spout of a tundish for molten metals, including a slide valve composed of a valve member mounted for movement between a head plate disposed on the underside of the tundish and a discharge member. For preventing in a particularly effective way any freezing of the molten metal and for avoiding any static shadow corners the valve member and/or the head plate or both in the closed and/or open or part-open position thereof are moved in such a way that a two-dimensional relative movement perpendicular to the longitudinal axis of the pouring spout is generated between the valve member and the head plate.

Method for controlling the discharge channel of a casting container

An apparatus for the exact position feedback of a double-acting power piston in a hydraulic power cylinder subjected to extreme environmental conditions, especially high temperatures, comprising a double-acting detecting (measuring), or follower cylinder, having a volume corresponding to that of said power cylinder and including a detecting piston the position of which is sensed by an electrical detector, wherein a pair of working spaces of power and detecting cylinders are in fluid communication with each other via a connecting pipe, while the respective other working spaces are adapted to be connected to a (pressursized) fluid pump or a reservoir through a control valve. Pressure limiting switches are each positioned in said connecting pipe as well as in the fluid line extending between the power cylinder and the control valve, and both the power piston and detecting piston each include a valve-controlled acknowledgement passage by which fluid communication can be established between the two working spaces of the power and detecting cylinders.

Exact position feedback of double-acting power piston in hydraulic

The invention relates to an apparatus for the exact position feedback of a double-acting power piston in a hydraulic power cylinder subjected to extreme environmental conditions, especially high temperatures, comprising a likewise double-acting detecting (measuring) or follower cylinder having a volume equivalent to that of said power cylinder and including a detecting piston the position of which can be sensed by electric means, wherein a pair of working spaces of power and detecting cylinders are in fluid communication with each other via a connecting pipe, while the respective other working spaces are adapted to be connected to a (pressurized) fluid pump or a reservoir through a control valve. This apparatus comprises pressure limiting switches which are each positioned in said connecting pipe as well as in the fluid line extending between said power cylinder and said control valve; and both said power piston and said detecting piston each include a valve-controlled acknowledgement passage by means of which fluid communication can be established between said two working spaces or of said power and detecting cylinders.

Apparatus for the exact position feedback of a double-acting power

Disclosed is a method of controlling the nozzle damper (slide valve) of a vessel for the metallurgical casting, in response of the variation of the molten metal level of the volume of molten metal tapped from said vessel the nozzle opening is stepwise controlled in response to, the value of the vertical level of the molten metal above said nozzle damper at the respective tapping time or after the respective tapping period with the molten metal volume calculated from the time integral of the respective previous actual damper opening areas.

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Duren-Niederau, Germany

Ludwig Walther