State determination device and state determination method

A state determination device for determining a molding state in an injection molding machine, the state determination device comprising:

• a data acquisition unit configured to acquire the number of productions and data related to a predetermined physical quantity as data indicating a state related to the injection molding machine;
• a feature amount calculation unit configured to calculate a feature amount indicating a feature of a state of the injection molding machine based on the data related to the physical quantity;
• a feature amount storage unit configured to associate and store the feature amount and the number of productions;
• a statistical condition storage unit configured to store a statistical condition including at least a statistical function for calculating a predetermined statistic from a predetermined feature amount;
• a statistical data calculation unit configured to calculate a statistic as statistical data with reference to a statistical condition stored in the statistical condition storage unit based on the feature amount stored in the feature amount storage unit;
• a statistical data storage unit configured to associate and store the statistical data and the number of productions;
• a regression analysis unit configured to perform regression analysis using a predetermined regression formula based on statistical data and the number of productions stored in the statistical data storage unit, and calculate a coefficient of the predetermined regression formula;
• and
• a determination unit configured to determine the number of productions or a date and time using a regression formula obtained by the regression analysis unit, a warning value indicating a predetermined molding abnormality being reached at the number of productions or the date and time.