Leybold-heraeus Gmbh

Rolf Ruthardt

Wolfgang Wagner

Franz Hohne

Josef Gediga

Friedrich-Carl Freytag

Heinz Pajonk

An arrangement for controlling the pouring of a melt out of a crucible with a hole in the bottom which hole is blocked while the material is being melted with a closure plate that melts through locally as the result of heat transferred from the melt. To precisely establish the time at which the closure plate melts through, the plate is cooled from below while the starting material is being melted. Cooling is at least decreased and preferably terminated when it is time to pour out the melt. The plate can be cooled by a flow of a gas coolant directed against it or by contact with a cooling element that is raised into position against it from below.

Method of and device for controlling the pouring of a melt

A device for manufacturing powder from a melt by a mechanism for dividing it up. The device has a vertical shaft and a powder outtake that communicates with the shaft. To achieve the objectives of reducing the overall height of such a device and preventing the powder from sintering, the powder outtake consists of the lower section of the shaft and has essentially the same cross-section as the upper section. Both sections, together, essentially determine the overall height of the device. Both sections are connected with a releasable connecting element and can be separated from each other in a direction perpendicular to the axis of the shaft.

Device for manufacturing powder by dividing a melt

An arrangement for manufacturing powder from a melt by a mechanism for dividing it up. The device has a vertical shaft and a powder outtake that communicates with the shaft through a funnel-shaped housing component. To achieve the objectives of reducing the overall height of such a device and preventing the powder from sintering, the axis of the housing component is perpendicular to the axis of the shaft, and the shaft tilts in a bearing until the axis of the housing component is horizontal.

Apparatus for manufacturing powder by dividing a melt

A plant for producing metal powder from metal melts includes a first chamber with a device for converting a melt stream initially into liquid and then solid metal particles in a non-oxidizing atmosphere, a tundish with a closable floor opening that can be mounted on the first chamber and discharged thereinto, and a melt device for filling the tundish with molten metal. The metal melt is continuously protected against oxidation or absorption of gas, the structural height of the plant is reduced and the capacity of the melt device is utilized to a greater degree by enclosing the melt device by a second chamber separated from the first chamber for maintaining a nonoxidizing atmosphere. The second chamber is equipped with at least one lock into which the tundish can be brought and from which it can be removed. The tundish, formed as a transporting vessel, is provided with a cover for maintaining a non-oxidizing atmosphere during transportation and discharge into the first chamber and the second chamber of the melt device is equipped with a drive mechanism for raising the cover for the filling procedure of the tundish.

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Hanau am Main, Germany

Rolf Ruthardt