Planetary Roller Extruder with Improved Cooling During the Extrusion of Melts
AssigneeEntex Rust & Mitschke GmbH
InventorHarald Rust
Life of this patent
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Abstract
The disclosure relates to various measures for increasing the cooling effect on a planetary roller extruder section/module. Those measures include a choke being arranged at an outlet of the planetary roller extruder section or module, a distance between centerlines of adjacent planetary spindles being at least equal to an outer diameter of the planetary spindles, providing a pressurized melt supply, having a cooling section composed of several sections/modules, providing at least one section/module in which a flow, during melt supply is converse to the conveying direction of the extruder, and providing cooling tubes arranged within the central spindle.
Claims26
-25. (canceled)
An extruder with at least one 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 liner,
- planetary spindles disposed between the central spindle and the 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,
- wherein the extruder comprises at least five elements selected from the group consisting of
- a) a choke arranged at an outlet of the planetary roller extruder section or module,
- b) a distance between centerlines of adjacent planetary spindles being at least equal to an outer diameter of the planetary spindles,
- c) a pressurized melt supply,
- d) a cooling section composed of several sections/modules,
- e) at least one section/module having a flow, during melt supply, converse to the conveying direction of the extruder, and
- f) cooling tubes arranged within the central spindle.
Dependencies are inferred from the claim text.