RESIN EVALUATION SYSTEM

PROBLEM TO BE SOLVED: To provide a resin evaluation system which can record quantitatively resin viscosity variations that affect variations in molding most. SOLUTION: The resin evaluation system has a means to automatically acquire the time-pressure waveform or position-pressure waveform at the time of the air shot under predetermined injection conditions using an injection molding machine 10; a means 21 to record the overlapping pressure data acquired in a plurality of times using the same molding conditions and drying conditions as for a certain resin grade; a means 24b to calculate the statistical central values and the index values of variation from the pressure measurement data of the plurality of times; and a means 25b to calculate a viscosity approximation by adopting the central values as the most probable viscosity and to calculate a viscosity approximation by adopting the target values of variation as the adoptable upper/lower limit value viscosity. And the system is so structured as to register simultaneously the most probable viscosity data adoptable as the viscosity data that are the intrinsic values of the resin and the upper/lower limit viscosity data. COPYRIGHT: (C)2006,JPO&NCIPI