Method for closing two-piece tool in an injection molding machine, comprises moving a tool part relative to another tool part over a closing stroke by a closing drive

摘要

The method for closing two-piece tool (1) in an injection molding machine, comprises moving a tool part (2) relative to another tool part (3) over a closing stroke by a closing drive (4). A permissible course with consideration of a tolerance band (TI/TF) is given beyond a given way-mark (s o) for the beginning of the tool protection for a driving force (F) or the power input (I) of the closing drive. The strength of the driving force (F m a x) is limited via a section (delta s 2) of the tool-secured closing stroke. A constant closing speed is given for a part of the closing stroke. The method for closing two-piece tool (1) in an injection molding machine, comprises moving a tool part (2) relative to another tool part (3) over a closing stroke by a closing drive (4). A permissible course with consideration of a tolerance band (TI/TF) is given beyond a given way-mark (s o) for the beginning of the tool protection for a driving force (F) or the power input (I) of the closing drive. The strength of the driving force (F m a x) is limited via a section (delta s 2) of the tool-secured closing stroke. A constant closing speed is given for a part of the closing stroke. A direct or indirect function course (Z s o l l), which is dependent on the speed course (v s o l l(s)) of the closing movement of the tool part over the tool-secured closing stroke, is defined or given for the monitoring of a normal closing of the tool and a disconnection of the closing drive is induced when a measured function course deviates the given function course with consideration of a tolerance band (T z). The function course (Z s o l l) is equal to the target speed course or is Z s o l l(S)=F s o l l(S)-v s o l l(S)x K, where F s o l l(S) is target driving force of the closing drive as function of the closing way (s), v s o l l(S) is the target speed course and K is a weighting factor. An immediate interruption of the movement of the movable tool part is depressed as soon as the tolerance volume for the function course is left.