REDUCED PRESSURE CASTING METHOD

REDUCED PRESSURE CASTING METHOD

PURPOSE:To manufacture a high quality casting product having little oxide by sucking inert gas through a sprue tube with reduced pressure in a mold and replacing air in a cavity in the mold and in a passage for the sprue tube with inert gas. CONSTITUTION:As the inert gas can be sucked through the sp...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: IIDA SEIZO, UOZUMI MINORU
Format: Patent
Sprache:eng
Schlagworte:
CASTING
CASTING OF METALS
CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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Beschreibung
Zusammenfassung:PURPOSE:To manufacture a high quality casting product having little oxide by sucking inert gas through a sprue tube with reduced pressure in a mold and replacing air in a cavity in the mold and in a passage for the sprue tube with inert gas. CONSTITUTION:As the inert gas can be sucked through the sprue tube 4 with the reduced pressure in the mold 1, the air in the cavity 8 in the mold 1 and in the passage for the sprue tube 4 can be perfectly replaced with the inert gas. After that, the pressure in the mold 1 is reduced and the molten metal 6 is filled up into the cavity 8 in the mold through the sprue tube 4. Therefore, in the process of filling up the molten metal 6 into the cavity 8 in the mold 1, the oxidation of molten metal 6 is restrained as much as possible and the high quality casting product is obtd.