| 摘要 |
A gravity pour vacuum casting method and apparatus providing uniform set-up provisions for gas permeable molds (10) regardless of mold size, shape, or mold type employed in accordance with the present invention. Apparatus includes a sprue-forming device (12) that when combined with a disposable foundry pattern (14) and subsequently invested together as a unit forms a gas permeable mold (10) in accordance with the present invention, and further includes a vacuum chamber (64) configured to match corresponding counterparts of said sprue-forming device (12).
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