Bi-metal feed screw for screw presses
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United States of America Patent
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-
Mar 5, 1991
Issued Date -
N/A
app pub date -
Oct 19, 1989
filing date -
May 6, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cast-formed bi-metallic worm in a mechanical screw press for expressing liquids from fibrous materials and a method of manufacture thereof. The worm is rotatably driven by the presses drive shaft and includes a body adapted to slidably engage around and be driven by the drive shaft and a flight extending radially outward from within the body. The body is formed of a ductal homogeneous cast material while the flight, which may be continuous or split, is cast formed of a harder homogeneous material so as to mechanically engage within and be rotatably driven by the body. The worm may also include a wear resistant cast-formed shell around the periphery of the body formed of either the same material as the flight or another hard wear resistant material.
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