Apparatus for separating mold plates from a casting
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United States of America Patent
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-
Jun 15, 1993
Issued Date -
N/A
app pub date -
Mar 23, 1992
filing date -
Aug 13, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for separating an upper (12) and lower (14) mold plate of a mold assembly (10) from a preformed substrate or casting (16) by including a mold ejection apparatus (70) having a support surface (76) to receive and support the mold assembly (10). A plurality of clamps (84) pivotally connected to the support surface (76) engage the preformed substrate (16) at spaced apart intervals about the periphery of the preformed substrate (16) to restrain the substrate (16) and lower mold plate (14) against the support surface (76). The apparatus further includes a plurality of secondary hydraulic pumps (98) having a piston (106) and cylinder (108) assembly and a lifting bar (120) pivotally connected to one end of the piston (106). The secondary pumps (98) are supported on the support surface (76) at spaced apart intervals adjacent the periphery of the mold assembly (10). A master hydraulic pump (132) is activated to provide a simultaneous operating force to each of the secondary hydraulic pumps (98) to uniformly separate the upper mold plate (12) from the preformed substrate (16).
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