Method and apparatus for compacting foundry mold making material

Details Method and apparatus for compacting foundry mold making material Method and apparatus for compacting foundry mold making material

1988-06-10

1990-04-10

Godici, Nicholas P.

Metal founding

Process

With measuring, testing, inspecting, or condition determination

164 71, 164 37, 164 38, 164154, 1641601, 164173, 164195, B22C 1508, B22C 1528

Patent

active

049151592

ABSTRACT:
To permit close matching of compaction pressure being applied to foundry mold making material, such as foundry sand, to the shape of a mold pattern (2) in a pattern box (3, 4), individual fluid pressure is applied to a plurality of press plungers (7) located on a pressure plate which is moved towards the sand in the mold box at a high rate of speed, the press plungers being biassed by fluid pressure to have a maximum difference (.DELTA.H) in stroke of penetration depth of at least 30% of the height (H) of the mold box; individual valves (14) can apply compressed air to individual cylinders under control, for example, of a microprocessor; the valves can be located in a matrix arrangement (FIG. 3). The method and apparatus can be used in combination with explosion or pressure impulse compaction and fluidizing of the foundry sand.

REFERENCES:
patent: 2959828 (1960-11-01), Frankenstein
patent: 3293703 (1966-12-01), Taccone
patent: 3586093 (1971-06-01), Young
patent: 4588017 (1986-05-01), Damm et al.
patent: 4617978 (1986-10-01), Damm
patent: 4620584 (1986-11-01), Witt
Giesserei-Praxis (Foundry Practice) 1965, vol. 21, pp. 440-442.
"Olehydraulik und pneumatik", (Oil Hydraulics and Pneumatics) vol. 10, 1966, No. 1, pp. 26-27.

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