Method and apparatus for the low-pressure die-casting of metals

Details Method and apparatus for the low-pressure die-casting of metals Method and apparatus for the low-pressure die-casting of metals

1988-05-27

1989-08-29

Seidel, Richard K.

Metal founding

Process

With measuring, testing, inspecting, or condition determination

164119, 164155, 164306, B22D 1732

Patent

active

048608203

ABSTRACT:
A low-pressure die casting process in which gaseous pressure is applied to molten metal in a bath (C) in three stages from three pressure applying circuits. The first circuit applies pressure to lift molten metal to the charging aperture of the die. When the presence of the metal at that die is detected by a sensor (8), a datum pressure is established and the further application of gaseous pressure to the molten metal is taken over by a second circuit. When the pressure applied to the molten metal differs from the datum pressure by a predetermined amount, an after pressure is applied to the molten metal by the third circuit.

REFERENCES:
patent: 2990592 (1961-06-01), Hursen
patent: 3844331 (1974-10-01), Py et al.
patent: 3951199 (1976-04-01), Pereira
patent: 4585050 (1986-04-01), Merrien et al.

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