A new approach in offline-optimization of the injection molding process

For the purpose of process optimization of the injection molding process a robust processing point is determined, at which specified characteristics o f the parts are met and the process is insensitive to disturbances. The ide a of the new optimization concept is to ensure that also around the robust processing point, within the so-called robust processing window, the part g eometry is in tolerance and a low standard deviation respectively a high SN -ratio is achieved Instead of reducing the optimization task to a one-dimen sional problem by combining the target functions, in this approach one defi nes lower and zipper bounds for the characteristics to be optimized. These bounds must be fulfilled in the range of the robust processing window and i f necessary, might be sharpened or relaxed during the optimization procedur e. The corresponding response surfaces ave generated by means of new Scatte red Data Interpolation-methods.