The Invention about Single screw extruder

The invention refers to a single screw extruder made up with a barrier screw and a barrel in which the barrier screw is held in a way that allows rotation and combining at least one feed zone longitudinal section and at least one melting zone longitudinal section. The extruder is characterized in that the barrel, on its inner wall in the area of the melting zone longitudinal section , has at least one groove  which runs in a longitudinal direction. The invention also includes a method for extruding plastic material using a single screw extruder  comprising a barrier screw which is held inside a cylinder in an extent that grants it to rotate, depending on  the extruder contains a melting zone and a feed zone , and the barrier screw has at least one solid matter channel and a melting channel. The method is described in that solid plastic material (solid matter) is conveyed in the area of the melting zone in a defined quantity into the melt channel and out of the solid matter channel.