Method for molding a fusible core

Details Method for molding a fusible core Method for molding a fusible core

1992-05-11

1993-08-31

Rosenbaum, Mark

Metal founding

Process

With measuring, testing, inspecting, or condition determination

164 41, 164113, B22D 1732

Patent

active

052400646

ABSTRACT:
A method for molding a fusible core from a molten metal, including filling a mold by forcing back molten metal under pressure into the mold by means of a positive displacement pump equipped with a pressure regulator and having an output rate, total filling of the mold corresponding to a manometric height; measuring the pressure of the forced-back metal; adapting the output rate of the positive displacement pump so that the growing pressure imposed on the forced-back molten metal does not undergo any sudden variation during filling of the mold; and limiting the pressure exerted on the molten metal to a maximum pressure value which is slightly higher than the manometric height.

REFERENCES:
patent: 3893792 (1975-07-01), Laczko
patent: 4019561 (1977-04-01), Aoki
patent: 4660620 (1987-04-01), Ozeki
patent: 4680151 (1987-07-01), Fujita et al.
patent: 4743190 (1988-05-01), Bunnschweiler et al.
patent: 4878032 (1989-10-01), Hatamura
Giesserei, vol. 78, No. 5, Mar. 4, 1991, pp. 146-150, Dusseldorf, DE; L. Iten: "Neue Druckgiessmaschinen mit digitaler Echtzeitregelung des Giessvorgangs".
Patent Abstracts of Japan, vol. 8, No. 280 (M-347) [17171], Dec. 21, 1984; & JP-A-59 150 652 (UBE Kosan K.K.) Aug. 28, 1984.

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