Heated-chamber die-casting apparatus
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United States of America Patent
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-
Mar 23, 1999
Grant Date -
N/A
app pub date -
Mar 19, 1997
filing date -
Mar 22, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A die-casting apparatus has a pair of mold parts together defining a mold cavity and a feed sleeve set in one of the parts and defining a passage having a short inner portion opening into and flared toward the cavity, a long outer portion of uniform cross-sectional shape and having an outer end, and a restriction between the portions. Molten metal is fed to the outer end and through the passage to the cavity. A heater surrounds the sleeve at the outer portion for heating the sleeve substantially only at the outer portion and insulation surrounds the heater. The sleeve and any metal therein are cooled at a location in the sleeve downstream of the passage outer portion, normally at the restriction.
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