| 摘要 |
Method and apparatus for countergravity casting a plurality of articles wherein a ceramic mold (10) is provided having an upstanding riser passage (12) and a plurality of mold cavities (16) disposed along a length of the riser passage (12) at different elevations, each mold cavity (16) communicating to the riser passage (12) via a gate passage (14), wherein molten metal is forced to flow upwardly from a source into the riser passage (12) for supply to the mold cavities (16) via their gate passages (14), wherein the mold is rotated so that molten metal that resides in the gate passages is subjected to centrifugal force in a direction toward the mold cavities (16), and wherein molten metal in the riser passage is drained to empty the riser passage before molten metal in the mold cavities (16) and th e gate passages solidifies, leaving the gate passages at least partially fille d with molten metal for supply to the mold cavities (16) in response to shrinkage.
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