Sealing riser sleeve
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United States of America Patent
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-
Apr 3, 2001
Grant Date -
N/A
app pub date -
Nov 4, 1997
filing date -
Nov 6, 1996
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A riser sleeve apparatus (10) for preparing and insulating a passage (14) within which molten metal is accumulated prior to its movement into a mold cavity which includes an inner surface (12) which longitudinally extends between a first end (16) and a second end (18) wherein the inner surface bounds the passage. The riser sleeve further includes an annular lip (20) which is positioned adjacent the second end and extends inward into the passage. When the riser sleeve is positioned about a plug of a pattern, the annular lip deforms to seal the passage at the second end. A process for forming a cast metal article using the riser sleeve apparatus. A process for forming the riser sleeve apparatus using a vacuum forming technique.
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