Melt ejection pressure control system for the melt spinning process

摘要

A method and apparatus for maintaining a constant ejection pressure in a melt spinning process for converting a molten metal into a metal foil of a uniform thickness. The backpressure exerted against inert gas being injected into the bottom of a crucible containing molten metal is monitored. Any negative rate change in the backpressure is noted and the gas overpressure in the crucible is then increased to return the back-pressure to its original value. In another embodiment the gas flow rate of the inert gas is monitored. Any positive rate change in the flow rate is noted and the gas overpressure is then increased to return the flow rate of the gas back to normal. This maintains a constant ejection pressure of molten metal passing through the orifice of the crucible producing foil with a uniform thickness.