Extruder for plastics
AssigneeGefinex-Jackson GmbH
InventorKlaus Dieter Kolossow
Life of this patent
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Abstract
An extruder comprising several zones, including at least a plasticizing and mixing zone, a residence, mixing and cooling zone, and a mixing and cooling zone being constructed as planetary-roller extruders, the zones being substantially shut off from one another by blisters, and being connected to one another via melt pipes and intermediate pumps.
Claims1
A method for the foam extrusion of plastics with an extruder with the incorporation of additives and aerating agents, in particular with the supply of relatively high-viscosity or low-viscosity polymers via a lateral-arm extruder, and also cooling to unmoulding temperature and supply into a moulding tool, the extruder comprising:
- multiple extruding zones;
- a pump being connected between at least two zones;
- at least one of the two zones connected by the pump is constructed as a planetary roller extruder section, said method comprising:
- supplying granulated plastic to a zone of the extruder;
- supplying additives and aerating compounds to another zone of the extruder;
- pumping plastic between zones of the extruder;
- pumping plastic through the planetary roller extruder section using the pump;
- cooling the material;
- and
- producing extruded plastic.
Dependencies are inferred from the claim text.