The present disclosure prevents load from being produced in an injection molding machine. The control device for an injection molding machine according to one embodiment of the present disclosure has a determining part that is configured to determine, based on information detected in accordance with a movement of a measurement motor provided in the injection molding machine, whether or not an operation of removing or attaching a screw that rotates in accordance with the measurement motor has been performed.

A remote controller can be provided on any apparatus that employs feedback control from a native controller to add functionality to the apparatus where the native controller is not capable of providing such functionality independently.

A remote controller can be provided on any apparatus that employs feedback control from a native controller to add functionality to the apparatus where the native controller is not capable of providing such functionality independently.

A remote controller can be provided on any apparatus that employs feedback control from a native controller to add functionality to the apparatus where the native controller is not capable of providing such functionality independently.

A virgin material plasticization time Tv, which is a time required for a screw to reach a predetermined plasticization end position Xe when only a virgin material Rv is plasticized, a crushed material plasticization time Ts, which is a time required for the screw to reach the predetermined plasticization end position Xe when only a crushed material Rs is plasticized, are measured and registered as basic time data Do. Actually measured time data Dp are obtained by measuring a crushed material mixed material plasticization time Tm when a molded product is produced by using the crushed material mixed material Rm, the crushed material mixed material plasticization time Tm being a time required for the screw to reach the plasticization end position Xe in a predetermined shot. The crushed material ratio Px in the crushed material mixed material Rm is obtained on the basis of the virgin material plasticization time Tv, the crushed material plasticization time Ts, and the crushed material mixed material plasticization time Tm. An output process is performed on the obtained crushed material ratio Px.

A plurality of AE sensors 6r, 6f are provided on a heating cylinder 2 at a plurality of different positions Xr, Xf in a forward-rearward direction Fs so as to detect AE waves AE waves We. Position data Dx related to a position where each AE wave We is generated are obtained on the basis of arrival times Tr, Tf of the AE wave We obtained from the AE sensors 6r, 6f. For each combination of a predetermined sampling period Tp and a predetermined set of the position data Dx, the number of times AE wave signals Sfe, etc. related to the generated AE wave We have exceeded a threshold value L set beforehand is obtained as attack number data Da. The number of AE wave signal components Sp having exceeded a threshold value set beforehand is obtained as event count data De. At least a generation pattern Ps of sets of the attack number data Da and sets of the event count data De which correspond to sets of the position data Dx is graphically displayed.