公开(公告)号：US11312041B2

公开(公告)日：2022-04-26

申请号：US16208273

申请日：2018-12-03

申请人： Steer Engineering Private Limited

发明人： Babu Padmanabhan

IPC分类号： B29B7/48 ,  B29C48/25 ,  B29C48/57 ,  B29C48/655 ,  B29C48/61 ,  B29C48/40 ,  B29C48/405

摘要： A dispersive mixing element for co-rotating twin screw extruder is disclosed. The element for co-rotating twin screw extruder comprises of a continuous flight helically formed thereon having a lead ‘L’, wherein either the flight transforms at least once from an integer lobe flight into a non-integer lobe flight in a fraction of the lead ‘L’ and transforms back to an integer lobe flight in a fraction of the lead ‘L’ or the flight transforms at least once from a non-integer lobe flight into an integer lobe flight in a fraction of the lead ‘L’ and transforms back to a non-integer lobe flight in a fraction of the lead ‘L’.

公开(公告)号：US20230302699A1

公开(公告)日：2023-09-28

申请号：US17996368

申请日：2021-04-27

申请人： KRAUSSMAFFEI TECHNOLOGIES GMBH

发明人： Stefan SCHIERL ,  Andreas BIERBAUMER ,  Thomas DROGI ,  Martin WÜRTELE ,  Lazlo GIESGEN

IPC分类号： B29C45/60 ,  B29C48/64 ,  B29C45/50 ,  B29C45/62 ,  B29C48/68 ,  B29C48/385 ,  B29C48/52 ,  B29C48/61 ,  B29C48/575 ,  B29C48/625

CPC分类号： B29C45/60 ,  B29C48/64 ,  B29C45/5008 ,  B29C45/62 ,  B29C48/682 ,  B29C48/385 ,  B29C48/52 ,  B29C48/61 ,  B29C48/575 ,  B29C48/625 ,  B29C45/0013

摘要： The application relates to a plasticizing unit with a cylinder and a screw that is rotatably mounted in the cylinder and has a screw section which is designed as a shearing section and in which a blocking web encircling the screw core in a helical manner and a main screw thread enclosed by the blocking web are provided. A shearing web runs in the main screw thread parallel to the blocking web at a lower height than the blocking web. In this manner, two screw threads are produced which run parallel to each other and are separated by the shearing web. The threads are designed in the form of wave screw threads. Each wave screw thread is equipped with one or more wave peaks with a surface which is designed in the form of a plateau and forms a wave peak shearing surface, wherein the wave peak shearing surface is located at the same height as the surface of the shearing web in the region. The shearing web surface section which lies in the region of a wave peak shearing surface constitutes a shearing web sharing surface. A wave peak shearing surface and a shearing web shearing surface together form a total shearing surface. A specified total shearing surface together with the inner wall of the cylinder forms a shearing gap in accordance with a shearing gap size specified for the total shearing surface.

公开(公告)号：US11376779B2

公开(公告)日：2022-07-05

申请号：US16622340

申请日：2018-05-30

申请人： KRAUSSMAFFEI EXTRUSION GMBH

发明人： Otto Skrabala ,  Stephan Roider

IPC分类号： B29C48/64 ,  B29C48/67 ,  B29C48/605 ,  B29C48/61

摘要： An extruder screw for the plasticizing of at least one plastic material or a plastic material mixture, with a melting zone, a wave zone and a mixing zone arranged between the melting zone and the wave zone, wherein a conveying web extending in a helix-like manner along a screw longitudinal axis is formed in the melting zone and in the wave zone, wherein a conveying web of the melting zone terminates at an end of the melting zone facing the mixing zone, and a conveying web of the wave zone begins at an end facing the mixing zone. The application also relates to an extrusion device with this extruder screw, and a method for plasticizing at least one plastic material or a plastic material mixture.