Metal founding – Means to shape a forming surface – Including means for compacting particulate fluent mold...
Patent
1977-02-02
1977-12-20
Shore, Ronald J.
Metal founding
Means to shape a forming surface
Including means for compacting particulate fluent mold...
164 37, 164379, 164394, B22C 1508
Patent
active
040635864
ABSTRACT:
A mold forming machine for the production of casting molds wherein molding sand is compressed within mold flasks is provided with stabilizing means for counteracting the effects of the compressive forces generated within the mold flask during compression of the molding sand tending to cause distortion of the flask. The stabilizing means include a movable frame which is adapted to extend about a molding flask placed in the machine with the frame being positioned relative to the flask by lifting gears which move the frame in accordance with the various stages of operation of the machine. A plurality of fluid pressure actuated tensioning elements are mounted on the frame to be movable therewith. The tensioning elements are adapted to apply compressive forces inwardly of the mold flasks during application of the molding sand compressing forces. Pressure devices for applying fluid pressure to the tensioning elements in order to effect application of the compressive forces against the mold flask operate to control the compressive forces applied by the tensioning elements so that the magnitude of these forces will be determined in relation to the magnitude of the forces applied by the molding sand compressing mechanism.
REFERENCES:
patent: 791214 (1905-05-01), Rockwood
patent: 1784995 (1930-12-01), Morris et al.
patent: 3695339 (1972-10-01), Toccone
Buhrer Erwin
Shore Ronald J.
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