Patent ID: 6074084
Filing Date: 2000-06-13
Classification: B29B,B29C,B29K

Abstract:
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; andproducing extruded plastic.