Method, Pressure-supply member and pressure-supply system for active after-feeding of castings
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United States of America Patent
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-
Sep 4, 2001
Grant Date -
N/A
app pub date -
Sep 13, 1999
filing date -
Mar 18, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
When pouring casting cavities in casting moulds having after-feeding reservoirs, tubular lances are introduced, firstly with their point at a short distance from the after-feeding reservoir, after which the lances are pressurized from a pressure chamber and by means of a member with an inclined surface pressed downwardly through the last short distance to the after-feeding reservoir so as to pressurize the latter. With this arrangement it is possible to pressurize the after-feeding reservoirs without the need of equipping the casting moulds with complicated extra equipment and without risk of the molten metal being pressurized unnecessarily.
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