Extruder with planetary roller section for cooling melts

An extruder, comprising:

• a planetary roller extruder section or planetary roller extruder module for cooling melts, comprising
• an internally toothed liner,
• an externally toothed central spindle disposed centrally within and at a distance from the internally toothed liner,
• planetary spindles disposed between the central spindle and the internally toothed liner, each planetary spindle having an external toothing meshing with both the internally toothed liner and the externally toothed rotating central spindle, and
• a stop ring configured to axially support a rear end of the planetary spindles while the planetary spindles rotate around the central spindle,
• a die arranged at an outlet of the extruder;
• a choke arranged upstream of the die at an outlet of the planetary roller extruder section or planetary roller extruder module,
• wherein the planetary roller extruder section or planetary roller extruder module for cooling melts is arranged immediately upstream of the die and configured to reduce a temperature of melt from a processing temperature to a discharge temperature, and
• wherein a distance between centerlines of adjacent planetary spindles is at least 1.5 times an outer diameter of the planetary spindles;
• least equal to an outer diameter of the planetary spindles;
• a pressurized melt supply;
• at least one section/module having a flow, during melt supply, converse to the conveying direction of the extruder;
• and
• cooling tubes arranged within the central spindle.