The extruder system includes a supply configured to receive raw material and comprising a heater configured to melt the raw material into extrudable material, an extruder configured to receive the extrudable material from the supply and comprising a screw conveyor configured to convey the extrudable material towards an extrusion nozzle of the extruder and cause an overpressure inside the extruder to allow selective extrusion via the extrusion nozzle. The extruder further includes a plunger arranged at or near the extrusion nozzle and configured to selectively release at least a part of the overpressure and thereby control a flow of extrudable material out of the extrusion nozzle to reduce oozing of extrudable material after stopping the flow.

The extruder system includes a supply configured to receive raw material and comprising a heater configured to melt the raw material into extrudable material, an extruder configured to receive the extrudable material from the supply and comprising a screw conveyor configured to convey the extrudable material towards an extrusion nozzle of the extruder and cause an overpressure inside the extruder to allow selective extrusion via the extrusion nozzle. The extruder further includes a plunger arranged at or near the extrusion nozzle and configured to selectively release at least a part of the overpressure and thereby control a flow of extrudable material out of the extrusion nozzle to reduce oozing of extrudable material after stopping the flow.

An extruder screw including an elongated cylindrical tension rod; screw segments including radially protruding functional elements configured to feed, mix, and/or knead an extrudate, and a respective pass through bore hole oriented in a longitudinal direction of the extruder screw, wherein the screw segments are slid onto the tension rod with the pass through bore hole and axially supported at a tip of the tension rod; a counter element that clamps the screw segments against the tip of the tension rod at an end of the tension rod wherein the end is arranged distal from the tip; and a locking element that is clamped between the screw segments and the counter element.

A production device for melt-blown non-woven fabric, with which a high molecular weight polymer can be reduced in molecular weight by applying a shear force to the high molecular weight polymer without adding an additive such as a peroxide that promotes thermal decomposition reaction, and a low molecular weight polymer can be efficiently produced. The low molecular weight polymer and the melt-blown non-woven fabric are produced using a continuous high shearing device that applies a shear force to the high molecular weight polymer serving as a raw material by rotation of a screw body 37 to reduce the molecular weight of the high molecular weight polymer so as to obtain a low molecular weight polymer, and cools the low molecular weight polymer by passing the low molecular weight polymer through a passage 88 arranged in the axial direction inside the screw body 37.