Eb Bruhl Aluminiumtechnik Gmbh

Nemak, S.a.b. De C.v.

Nemak Linz Gmbh

Rolf Gosch

Henning Meishner

Peter Stika

Wolfgang Kuhn

Annett Bretschneider

Wolfgang Kühn

An enamel powder for manufacturing a coating is present as a mixture which contains 100 parts of a glass powder, 0.1-7.5 parts of ceramic fibers, glass fibers or carbon fibers, and alternatively to one another or in combination with one another 10-21 parts of a powdery oxidic compound of a light metal or 1-5 parts of a powder of a heavy metal. A metal component provided with the enamel powder withstands a flow of hot gas against it. The invention specifies a method, by means of which such metal components can be provided with an enamel coating.

Enamel powder, metal component having a surface section provided with an enamel coating and method for manufacturing such a metal component

A supply vessel containing a molten bath has a discharge opening which is controlled by a valve. The discharge opening is located in a vertical plane and has a horizontal axis. The valve includes a set of valve plates having through openings for the passage of molten material. The valve plates are rotatable relative to one another in order to bring the through openings into and out of register and thus open and close the valve. One of the valve plates sits adjacent the discharge opening and is stationary while another of the valve plates is remote from the discharge opening and is freely rotatable. A mold having an inlet, a casting cavity and feeders between the inlet and casting cavity is brought into engagement with the freely rotatable valve plate. The mold is positioned with the casting cavity below the upper surface of the molten bath and with the feeders below the casting cavity. The valve is opened and the casting cavity filled with molten material via the mold inlet and the feeders. When the casting cavity is full, the mold is rotated on the horizontal axis of the discharge opening in order to bring the feeders above the casting cavity. The freely rotatable valve plate rotates with the mold so that the valve remains open during rotation of the mold. The valve is closed after the molten material in the casting cavity has solidified. The mold is removed from the supply vessel once the entire contents of the mold are solid.

Method of and vessel for filling a casting mold

A rotary slide valve for controlling the flow of molten material from a discharge opening of a holding vessel into an inlet of a rotatable casting mold has three valve plates which are in face-to-face contact. A first valve plate at the inflow side of the valve is fixed and is designed to abut the holding vessel peripherally of its discharge opening. A second valve plate at the discharge side of the valve is designed to engage the mold peripherally of the mold inlet and to rotate with the mold between two terminal positions. The third valve plate is sandwiched between the others and can be driven in rotation relative to both. Each of the valve plates is provided with a through opening. The valve is designed so that, at least in the two terminal positions of the discharge valve plate, the openings of all the valve plates can be brought into register and the openings of two of the valve plates can be brought out of register.

Rotary slide valve for metallurgical vessels

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Thalheim bei Wels, Austria

Rolf Gosch