Patent ID: 9643351
Date: 2017-05-09
CPC Classifications: B29C

Claim:
1. A method of automatically adjusting an injection molding process to compensate for variations in the flowability of a molten plastic material, the method comprising: providing an injection molding machine with at least one mold cavity; providing an injection molding controller, which includes a pressure control output that is configured to generate a control signal, which, at least partially determines an injection molding pressure for the injection molding process of the injection molding machine; measuring a first control signal generated from the pressure control output at a first time in an injection molding cycle; measuring a second control signal generated from the pressure control output at a second time in the same injection molding cycle, subsequent to the first time; comparing the first control signal generated from the pressure control output and the second control signal generated from the pressure control output to obtain a comparison result; and determining a third control signal for the pressure control output, based at least in part on the comparison result, at a third time that is subsequent to the second time.