| 摘要 |
Covers metal casting methods and apparatus to minimize the formation of voids and to improve the quality of the final cast product. The casting mold, which is preferably positioned adjacent to other parts of the casting apparatus, is provided with an opening preferably adjacent to a "hot spot" of the casting space where the poured metal would be expected to solidify at a relatively slower rate, so that some of the molten metal will reach through and beyond the opening and form a metallic nib or projection. The casting equipment, which includes a movable rod, is operated to drive the rod against the nib or projection to force it through the opening surface and into pressurized contact with the casting material to overcome the voids which would otherwise be produced within the cast product.
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