Extruder screw with long wearing surfaces
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United States of America Patent
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Apr 7, 2009
Grant Date -
Nov 10, 2005
app pub date -
May 5, 2005
filing date -
May 8, 2004
priority date (Note) -
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Abstract
A method of extending the life of an extruder screw by affixing tiles of wear-resistant material along the crest of the extruder screw flighting threads, and optionally grinding the hardened material to remove any sharp edges. In another configuration of the present invention, plates of wear-resistant material are secured to the leading edges of the extruder screw threads to further prolong the life of the extruder screw.
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