KNIVES COMPRISING COMPOSITE MATERIALS FOR USE WITH PELLETIZING DIES
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United States of America Patent
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Issued Date -
Dec 3, 2015
app pub date -
May 30, 2014
filing date -
May 30, 2014
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Pelletizing die and knife assemblies that may be used for pelletization of plastic extrudate are disclosed. The knife assemblies may include an extrusion die and a rotary knife hub assembly. The rotary knife hub assembly may comprise a hub having multiple pelletizer cutting knives mounted thereon. Each knife may include a cutting blade insert mounted on a body of the knife. The cutting blade inserts may comprise a composite material having a continuous metal matrix with hard metal carbide particles dispersed therein. The composite material has relatively high hardness and good wear resistance properties, but may have a hardness less than the hardness of the pelletizing die surface in order to reduce wear of the die face.
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