Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1993-07-27
1994-07-05
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164306, B22D 1706
Patent
active
053259050
ABSTRACT:
A multi-stage sand mold 4 defines a plurality of casting impressions or cavities 31 fed with molten metal from a tubular central chamber 28 via intermediate ducts 30A, 30B extending horizontally outwardly from opposite sides of the chamber, and ingates 32A, 32B extending between the ducts and the impressions. At each stage the sum of the cross-sectional areas of the ducts at their inlets is substantially less than the cross-sectional area of the central chamber, and the sum of the cross-sectional areas of the ingates fed by a given duct is at least equal to its cross-sectional area. This results in delivery rate reductions at the entrances to the ducts and in pressure reductions at the entrances to the ingates, which enhances the uniformity and integrity of the castings.
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Lin Kuang Y.
Pont-A-Mousson S.A.
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