公开(公告)号：US20230390986A1

公开(公告)日：2023-12-07

申请号：US18032253

申请日：2021-10-19

申请人： Covestro Deutschland AG

发明人： Thomas Koenig ,  Ulrich Liesenfelder ,  Roland Engberg ,  Gudrun Schmidt

IPC分类号： B29C48/405 ,  B29C48/605 ,  B29C48/65 ,  B29C48/40 ,  B29C48/27 ,  B29C48/25

CPC分类号： B29C48/405 ,  B29C48/605 ,  B29C48/65 ,  B29C48/402 ,  B29C48/2715 ,  B29C48/2517

摘要： The present invention relates to a multishaft extruder having screw shafts that rotate in the same sense and at the same speed, wherein these screw shafts each have at least one region having a special arrangement of screw elements, wherein the screw elements have an asymmetrical cross-sectional screw profile. In this case, these in each case at least one regions are situated directly opposite on directly adjacent screw shafts. The present invention also provides for the use of the extruder of the invention for processing or production of plastic or viscoelastic masses.