Screw extruder with a rotatable barrel section

Details Screw extruder with a rotatable barrel section Screw extruder with a rotatable barrel section

1986-06-06

1987-11-24

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

264 401, 366 94, 425185, 425205, 425208, 425DIG21, B29C 4700

Patent

active

047086173

ABSTRACT:
A screw extruder comprises a barrel including a section that is supported for rotation about the longitudinal axis of the barrel. A screw extends and is supported for rotation in the barrel; and, in use, rotation of the screw rotates and advances plastic material through the barrel. Rotation of the screw also causes the rotatable barrel section to rotate, and a brake is connected to that rotatable section to maintain the rotational speed of the rotatable section less than the rotational speed of the extruder screw. The rotational speed of the screw relative to the rotatable barrel section controls the relative rates at which plastic is mixed, heated, and pressurized in the barrel.

REFERENCES:
patent: 3748074 (1973-07-01), Nitta et al.
patent: 4197070 (1980-04-01), Koschmann
patent: 4214859 (1980-07-01), Anders
patent: 4289410 (1981-09-01), Anders
patent: 4300840 (1981-11-01), Kishihiro
patent: 4365946 (1982-12-01), Anders

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