公开(公告)号：US20180169921A1

公开(公告)日：2018-06-21

申请号：US15737180

申请日：2016-07-19

申请人： KraussMaffei Technologies GmbH

发明人： REINHARD SCHIFFERS ,  STEFAN KRUPPA ,  STEFAN MOSER ,  MATTHIAS BUSL ,  JOHANNES WORTBERG

IPC分类号： B29C45/76 ,  B29C45/47 ,  B29C45/57 ,  B29C45/58 ,  B29C45/62 ,  B29C45/77

CPC分类号： B29C45/76 ,  B29C45/47 ,  B29C45/5092 ,  B29C45/57 ,  B29C45/581 ,  B29C45/62 ,  B29C45/7646 ,  B29C45/77 ,  B29C2945/76006 ,  B29C2945/7602 ,  B29C2945/7604 ,  B29C2945/7605 ,  B29C2945/7612 ,  B29C2945/76187 ,  B29C2945/7619 ,  B29C2945/76197 ,  B29C2945/76381 ,  B29C2945/76384 ,  B29C2945/76545 ,  B29C2945/76605 ,  B29C2945/76665 ,  B29C2945/76859 ,  B29C2945/76862 ,  B29C2945/76933

摘要： In a method for operating an injection moulding machine in the absence of a backflow barrier, plastic melt is injected by a plasticising device into a cavity in a screw antechamber of a plasticising screw adapted to rotate about a longitudinal axis and to move translationally by a drive unit during an injection phase and a holding- pressure phase. A rotational drive of the drive unit is controlled such that a speed of the plasticising screw causes overlay of a backflow of the plastic melt from the screw antechamber back into screw threads of the plasticising screw by an opposing delivery flow as a result of a rotation of the plasticising screw due to a translational injection movement of the plasticising screw. A differential flow is established from the backflow and the opposing delivery flow and influenced at least during the injection phase by influencing the speed of the plasticising screw.

公开(公告)号：US20180272586A1

公开(公告)日：2018-09-27

申请号：US15765157

申请日：2016-10-05

申请人： KRAUSSMAFFEI TECHNOLOGIES GMBH

发明人： REINHARD SCHIFFERS ,  STEFAN MOSER ,  STEFAN KRUPPA ,  MATTHIAS BUSL

IPC分类号： B29C45/76

CPC分类号： B29C45/766 ,  B29C45/76 ,  B29C45/762 ,  B29C2945/76107 ,  B29C2945/7619 ,  B29C2945/76257 ,  B29C2945/76381 ,  B29C2945/76498 ,  B29C2945/76545 ,  B29C2945/76859 ,  B29C2945/76933

摘要： A method for determining an actual volume Vr of an injection-moldable compound during an injection-molding process is disclosed. The injection-moldable compound is introduced into at least one cavity of the mould. The method includes the steps of: a) determining a theoretical volume Vt from process variables at least during a filling phase of the injection-molding process, b) determining and/or measuring at least one value for at least one compound pressure pM, c) selecting a material-specific compression k (p), corresponding to the value of pM, of the injection-moldable compound, and d) calculating an actual volume Vr by taking into account the compression k (p).