Injection molding controller with process variable learning

Details Injection molding controller with process variable learning Injection molding controller with process variable learning

B - Operations, Transporting

29

C

B29C 45/76 (2006.01)

Patent

CA 2042720

Abstract of the Disclosure A controller for an injection molding machine controls the injection ram by means of profiles having segments with programmable setpoints. The injection molding machine is initially controlled during each segment in an open-loop manner. Closed-loop control is then adopted. The difference between the process signal, e.g. ram velocity, and the setpoint at the end of each segment is used to change the current setpoint to improve the open-loop accuracy over time. The learning rate of change of the open-loop setpoints decreases after the initial correction.

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