Protective gas device for pressure die-casting machines

Details Protective gas device for pressure die-casting machines Protective gas device for pressure die-casting machines

2007-11-06

2007-11-06

Johnson, Jonathan (Department: 1725)

Metal founding

Means providing inert or reducing atmosphere

C164S154100

Reexamination Certificate

active

10529080

ABSTRACT:
A protective gas device for the melting furnaces of pressure die-casting machines, in particular for processing a magnesium melt. A collection container of a mixing device for the components of a protective gas, which covers the melt to prevent oxidation or other damage, is configured as a pressure accumulator and the orifices for feeding the protective gas into the melting furnace are provided with inlet nozzles. Gas flow to the inlet nozzles is regulated by metering devices. The operating pressure is equal to or less than the pressure in the pressure accumulator of the mixing device, but high enough to atomise the jets and produce a turbulent inflow behind the inlet nozzles. Said pressurized protective-gas distribution permits the metering of gas into various furnace chambers or furnaces without repercussions. A uniform concentration of the protective gas can be achieved in all areas by the selective arrangement of the inlet nozzles.

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