THE PREDICTION OF INJECTION MOLDED PRODUCT MASS THROUGH PROCESS SIGNALS

摘要

The injection molding process has a complicated set of process parameters and is subject to variations over time resulting from material, environmental and machine component changes. In order to maintain product quality it has been proven that monitoring the process signals is beneficial towards identifying possible changes in the molded product. Here, the process signals (melt pressure, temperature and screw displacement) are utilized along with material pressure-specific volume-temperature (pvT) characteristics to estimate the molded product mass. The successful validation of this method is presented over a range of processing conditions.