Plasticization control method and plasticization control apparatus for injection molding machine

A plasticization control apparatus for an injection molding machine including a molding machine controller which performs a plasticization process for plasticizing a molding material fed into a heating cylinder by rotating a screw inserted into the heating cylinder and which performs molding by injecting the plasticized molding material to fill a predetermined mold assembly by advancing the screw, the plasticization control apparatus including the molding machine controller which comprises:

• a molding condition setting function section which sets at least a target torque value for screw rotational torque and an upper limit value for screw rotational speed as molding conditions;
• a plasticization control function section which controls rotation of the screw during the plasticization process on the basis of the target torque value;
• and
• a plasticization state display function section which pop-up displays a graphic display screen when a changeover switch is operated, in addition to a normal waveform display screen, wherein the graphic display screen is used for displaying data representing changes in at least one of screw position, the screw rotational torque, and the screw rotational speed during the plastination process, and the normal waveform display screen is used for displaying data representing changes in at least one of injection speed, injection pressure, and mold assembly parting opening amount.