Apparatus and method for sequentially feeding quantities of sand

Details Apparatus and method for sequentially feeding quantities of sand Apparatus and method for sequentially feeding quantities of sand

1996-09-09

1999-09-28

Batten, Jr., J. Reed

Metal founding

Process

Shaping a forming surface

164 37, 164 38, 1641601, 164193, 164195, B22C 1500, B22C 1524

Patent

active

059571896

ABSTRACT:
A first quantity of all the molding sand necessary to produce a mold is fed in the mold space, the first quantity being one of at least two parts divided from the total molding sand. The mold space is evacuated and then air is introduced into the mold space at the air-pressure rising rate of 30--to 500 kg/cm.sup.2 /sec. Another quantity of the molding sand is fed into the mold space, the mold space is evacuated and then air is introduced into the mold space at the air-pressure rising rate of 30--to 500 kg/cm.sup.2 /sec. The apparatus includes a sand passage through which each quantity of sand is fed into the mold space, and a gate for closing the sand passage thereby closing the mold space to allow the mold space to be evacuated and then subjected to a pressure increase.

REFERENCES:
patent: 5558148 (1996-09-01), Uzaki et al.

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