Method and apparatus for low pressure aluminum foam casting

Details Method and apparatus for low pressure aluminum foam casting Method and apparatus for low pressure aluminum foam casting

2005-08-23

2005-08-23

Lin, Kuang Y. (Department: 1725)

Metal founding

Means to shape metallic material

Pressure shaping means

C164S079000

Reexamination Certificate

active

06932146

ABSTRACT:
A method for casting an article composed of a foamed metal includes positioning a die with a die cavity above a bath of a molten metal and pressurizing the bath to cause the molten metal to fill the die cavity. A gas is then bubbled through the molten metal to form a foam. The foam is formed in the die cavity. Once the foam in the die cavity is solidified, the pressure in the bath is released and the formed article is removed. An apparatus for the method includes a die positioned above the bath, the die having a die cavity in fluid communication with the bath. The bath is provided with a pressurizing means and a venting means as well as a gas supply port for forming the foam.

REFERENCES:
patent: 3214265 (1965-10-01), Fiedler
patent: 3297431 (1967-01-01), Ridgway, Jr.
patent: 3940262 (1976-02-01), Niebylski et al.
patent: 4618427 (1986-10-01), VenÅs
patent: 55-84260 (1980-06-01), None
G. Davies et al., “Review Metallic Foams: Their Prdoduction, Properties and Applications,” Journal of Material Science, 1983, pp. 1899-1911, No. 18.

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