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A METHOD OF CASTING IN A GAS PERMEABLE SHELL MOLD AND A GAS PERMEABLE SHELL MOLD FOR CARRYING OUT THE SAID METHOD
A METHOD OF CASTING IN A GAS PERMEABLE SHELL MOLD AND A GAS PERMEABLE SHELL MOLD FOR CARRYING OUT THE SAID METHOD
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机译：一种在气体渗透性壳模中铸造的方法以及一种用于实施所述方法的气体渗透性壳模中的方法
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摘要
A method of casting in a gas permeable, shell mold, comprising the steps of providing a mold with a vertical riser passage having an open lower end and having a mold cavity connected to said riser passage by a gate passage having stabilizing screen means there across, providing a crucible for holding molten metal, lowering the open lower end of said mold beneath the surface of molten metal in said crucible, causing molten metal to fill said riser passage and said mold cavity through said gate passage and said stabilizing screen means therein and to filter out impurities and draining molten metal from said riser passage and from the portion of said gate passage between said stabilizing screen means and said riser passage before complete solidification of said molten metal in said mold cavity, said stabilizing screen means stabilizing molten metal in said mold cavity and in the portion of said gate passage between said stabilizing screen means stabilizing molten metal in said mold cavity and in the portion of said gate passage between said stabilizing screen means and said mold cavity during and subsequent to drainage of molten from said riser passage and from the portion of said gate passage between said stabilizing screen means and said riser passage.
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