Screw shaft structure for double-shaft extruder
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United States of America Patent
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Jun 16, 2015
Grant Date -
Sep 26, 2013
app pub date -
Mar 30, 2012
filing date -
Mar 31, 2011
priority date (Note) -
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Abstract
A screw shaft structure for a twin screw extruder includes a tapered section (20) provided between a ground section (6) and a screw piece inserting section (8), and a tapered ring (21) fitted onto the tapered section (20). The tapered ring (21) serves as a flange section. An object is to reduce the weight of raw material to be used for manufacturing a screw shaft by combining a tapered section and a tapered ring as a structure of a flange section.
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