Method for manufacturing mixing impeller
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United States of America Patent
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-
Mar 30, 1999
Issued Date -
N/A
app pub date -
Feb 26, 1993
filing date -
Jan 17, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method of making an impeller having inner and outer portions of polyurethane resin having different flexibilities with the outer portion bonded to the inner portion and having greater flexibility than the inner portion, includes rotating a centrifugal casting mold containing a polyurethane resin forming material of predetermined composition, introducing into the inner portion of the mold another polyurethane resin forming composition of different composition than the first material, centrifugal casting the inner and outer portions together, and curing the resulting shape to form a disk having bonded inner and outer portions of polyurethane resin having different flexibilities.
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Cited Art Landscape
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