Screw extruder with a rotatable barrel section
AssigneeMobil Oil Corporation
InventorFox J. Herrington
Life of this patent
Estimating the term…
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.
Claims17
A screw extruder comprising:
- a longitudinally extending barrel including
- (i) a feed section for receiving a plastic material, and
- (ii) an outlet to discharge the plastic material from the barrel;
- and
- an extruder screw rotatably supported in the barrel to rotate and to advance the plastic material therethrough;
- the barrel further including a rotatable section located forward of the feed section to receive the plastic material therefrom, and supported for rotation relative to the feed section and about the extruder screw, and wherein rotation of the extruder screw rotates the rotatable section around the extruder screw;
- and
- the screw extruder further comprising means connected to and supporting the rotatable section for said rotation
A screw extruder comprising:
- a longitudinally extending barrel including
- (i) a feed section for receiving a plastic material,
- (ii) a rotatable section located forward of the feed section to receive the plastic material therefrom, and from the barrel;
- a bearing assembly connected to and supporting the rotatable section of the barrel for rotation relative to the feed section and about the longitudinal axis of the barrel;
- an extruder screw longitudinally extending and supported for rotation in the barrel to rotate and to advance the plastic material therethrough, and to cause the rotatable section to rotate;
- and
- brake means connected to the rotatable section to slow rotational movement thereof and to maintain the rotational speed of the rotatable section less than the rotational speed of the extruder screw.
Dependencies are inferred from the claim text.