Plasticating screw

A plasticating screw comprising:

• a screw channel that runs spirally around a screw core and is laterally delimited by a flight, said screw channel comprising flow elements that are distributed over its longitudinal direction and extend transversely over the screw channel, the flow elements extending across a breadth of the flight, each flow element comprising:
• a deep section extending in the longitudinal direction of the screw channel;
• and
• a compression section radially rising in the longitudinal direction such that a flow of material enters the deep section and further enters the compression section, the compression section comprising:
• a first run-up surface inclined towards the flight and a plateau for flow formation, the first run-up surface connected to the plateau such that the flow of material flows over the first run-up surface toward the plateau;
• and
• a second run-up surface inclined towards another flight opposite the flight such that the first run-up surface and the second run-up surface form a wedge,
• wherein the flow elements are provided at least in a melting zone of the plasticizing screw.