TWO-STAGE EXTRUDING APPARATUS AND EXTRUSION PROCESS OF RUBBER COMPOUNDS AND PLASTICS

摘要

A new process extrudes rubber mixtures and plastics, in a two-stage extrusion unit, with intermediate evacuation removing gases between stages. In this method, the first extrusion stage (1) employs a gear pump extruder. At its output, or immediately thereafter, the extrudate is strained (3), finely divided into strands (5) and/or split up. The product, during transfer to the second extrusion stage (2), enters an evacuated (7, 8) chamber (6). Also claimed is the corresponding extrusion unit.