Mobile device for producing joint-shaped seams on partial surfaces of asphalt cover layers

摘要

To solve the problem of plasticizing and homogenizing a bituminous material with a mobile device, whereby gas inclusions in the material and a pulsation in the mass flow of the material are at least reduced, such a mobile device is proposed, at least comprising an addition unit, an extruder housing and one of the extruder housing downstream discharge unit, a double screw extruder being arranged in the extruder housing, which comprises a first screw extruder and a second screw extruder with extruder axes running approximately parallel to one another, a first shaft and a second shaft, the first screw extruder having a first helix on the first shaft and the second screw extruder has a second helix on the second shaft, and the first helix and the second helix are designed to mesh with one another, and the first screw extruder and the second screw extruder each have a K anally, which form a space between the respective turns of the first and the second helix, the channels having a channel width which decreases in width from a feed zone, via a compression zone to an ejection zone of the twin-screw extruder, and the respective channels Decrease at a channel height starting from the feed zone, over the compression zone to the discharge zone.