Extruder for extrusion manufacturing

Details Extruder for extrusion manufacturing Extruder for extrusion manufacturing

1997-07-24

1999-05-18

Ryan, Patrick

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

Centripetal elastic melt extruder type

72264, 76 51, 761086, 2642092, 408 59, 4253823, 425461, B29C47/24

Patent

active

059049391

ABSTRACT:
An apparatus for manufacturing a rod of hard metal or ceramic with at least one helical inner bore. A plasticized mass of hard metal or ceramic is simultaneously forced through a die and twisted. Either the mass is twisted uniformly over the cross-section of the billet by a spinner immersed in the mass or the spinner is rotated by the mass. The mass emerges either subject to torsion or entirely or mostly without torsion from a smooth downstream channel through the die. A filament-shaped material extends or is injected into the mass to produce the inner bore or bores.

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patent: 2174779 (1939-10-01), Delorme
patent: 3205692 (1965-09-01), Kemppinen et al.
patent: 3520966 (1970-07-01), Soffiantini
patent: 3651187 (1972-03-01), Cessna, Jr.
patent: 4120628 (1978-10-01), Simos
patent: 4704055 (1987-11-01), Guhring
patent: 4779440 (1988-10-01), Cleve et al.
patent: 4921414 (1990-05-01), Schliehe et al.
patent: 5049331 (1991-09-01), Hempel
patent: 5601857 (1997-02-01), Friedrichs

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