Self-cleaning type extruder

Details Self-cleaning type extruder Self-cleaning type extruder

B - Operations, Transporting

29

C

18/731

B29C 47/40 (2006.01)

Patent

CA 1124973

ABSTRACT A self-cleaning type extruder including a cylinder and at least two screws therein adapted to rotate in the same directions, said screws being in such a relation that at any position in at least a part of the screws which lies in the longitudinal direction of the extruder, the con- tour of one screw in a cylinder cross-section taken at right angles to the screw axes is in substantial contact at one point with the contour in the same cross-section of another screw intermeshing therewith; wherein each of said screws has at least two screw flights, and the top of at least one of the screw flights is substantially in contact with the inner wall surface of the cylinder and the top of at least one other screw flight has a predeter- mined tip clearance with respect to the inner wall surface of the cylinder.

316407

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