Feed unit for an extruder

Details Feed unit for an extruder Feed unit for an extruder

1988-06-08

1989-09-05

Thurlow, Jeffery

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

425205, 425209, 425377, 26421121, 264349, B29C 4710, B29C 4736, B29B 760

Patent

active

048633666

ABSTRACT:
An extruder having a barrel with a central passageway, which passageway journals a single rotating extruder screw with flight thereon. The extruder screw has a feed section, a transition section and a metering section with the metering section discharging the extruder melt. The extruder barrel has an opening at the feed section that receives a deflector member that is located between such opening and the hopper that receives the plastic material to be processed for feeding into the central passageway for conveyance and working by the extruder screw. The deflector member has a progressively restrictive inlet that cooperates with the flights of the extruder screw to draw in the plastic material fed thereinto.

REFERENCES:
patent: 2947030 (1960-08-01), Varn
patent: 3310835 (1967-03-01), Morozov et al.
patent: 3386131 (1968-06-01), Vanzo
patent: 3496603 (1970-02-01), Listner et al.
patent: 3744770 (1973-07-01), Ocker et al.
patent: 3790328 (1974-02-01), Maxwell
patent: 4431105 (1984-04-01), Meeker et al.
patent: 4448736 (1984-05-01), Emery et al.

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