Metal founding – Means to shape a forming surface – Including means applying vacuum directly to mold material
Patent
1985-05-24
1986-11-04
Godici, Nicholas P.
Metal founding
Means to shape a forming surface
Including means applying vacuum directly to mold material
164195, B22C 1528
Patent
active
046205845
ABSTRACT:
A green sand mold filling system is formed of an air chamber box having a cover plate which supports a pattern. Air passageway holes, which communicate with the air chamber, extend through the plate and pattern at preselected locations, such as difficult to fill pockets, depressions and the like. An open top and bottom flask section is positioned over the plate and around the pattern. Filling sand is poured into the flask and is mechanically compacted or squeezed therein. During the filling and squeezing, a vacuum is provided in the air chamber and, therefore, through the air passageway holes, to assist the sand flow into and the sand densification at the pre-selected locations. Thereafter, the vacuum is discontinued and pressurized air is provided in the air chamber and, therefore, through the air passageway holes, to assist in separation of the compacted sand from the pattern and plate and to maintain the integrity and accuracy of the cavity formed in the sand while the flask section is removed.
REFERENCES:
patent: 1475935 (1923-12-01), Coleman
patent: 3293703 (1966-12-01), Taccone
patent: 3858639 (1975-01-01), Larkin
patent: 4103733 (1978-08-01), Edwards
Batten, Jr. J. Reed
Godici Nicholas P.
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