device for extruding a viscoelastic material and method for homogenizing and filtering a viscoelastic material

摘要

Device for extruding a viscoelastic material and method for homogenizing and filtering a viscoelastic material Extrusion device for a viscoelastic material including two (2,3) or multiple mixing screws and loaders positioned coaxially and concentrically on one as (1) the larger diameter screw fillet ends (2) have holes (22) allowing the space covered by the threads (21) of said larger diameter screw (2) to communicate with the space covered by the fillers (31) of the larger screw immediately smaller diameter (3), in which a fixed cylindrical tube (4) including openings (41) passing through the wall of said cylindrical tube is inserted between the space covered by the threads (32) of the smaller diameter screw (3) and the the space within which the holes (22) open, in which the space covered by the larger diameter screw threads is closed by a wall (43) so that when the device is operating, material is forced into holes (22) and into openings (41), characterized in that the wall (43) has a hole (42) communicating with an outlet duct (52, 62) closed by a removable shutter device (61).