Plasticizing screw for injection molding and injection molding method using same
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United States of America Patent
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Jul 21, 2015
Grant Date -
Aug 8, 2013
app pub date -
Oct 29, 2010
filing date -
Oct 29, 2010
priority date (Note) -
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Abstract
A plasticizing screw for injection molding according to the present invention is a plasticizing screw for injection molding that is installed in an injection molding machine which performs injection molding by plasticizing granular thermoplastic resin feedstock containing reinforcement fibers, and includes a shaft, a flight, and a mixer. The mixer is provided in plural stages in an axial direction, and the number of fins of the mixer of each stage increases toward a leading end side in the axial direction from a rear end side in the axial direction. Further, the protrusion height of each fin from the peripheral surface of the shaft is lower than the protrusion height of the flight from the peripheral surface of the shaft.
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