Molding device and control method thereof

Abstract

An object is to provide a molding machine and a control method therefor which can reliably determine whether an anomaly has occurred in the molding machine. The molding machine includes anomaly-determination-index obtainment processing means for obtaining an anomaly determination index for determining whether an anomaly has occurred in the molding machine; integration processing means for integrating the obtained anomaly determination index so as to obtain an integral value; and anomaly determination processing means for determining, on the basis of the integral value, whether an anomaly has occurred in the molding machine. In this case, since the anomaly determination processing is performed on the basis of the integral value of the anomaly determination index, high-frequency components contained in the anomaly determination index can be removed. Further, even when noise is generated in the anomaly determination index stemming from jumping, time shift, etc., influences of the noise can be cancelled out. Accordingly, the anomaly determination processing can be accurately performed, and the determination as to whether an anomaly has occurred in the molding machine can be performed reliably.

Description

Technical field [0001] The invention relates to a molding machine and a control method thereof. Background technique [0002] Conventionally, a molding machine that is a predetermined mechanical device that drives a motor, such as an injection molding machine, is provided with an abnormality determination device for determining whether an abnormality has occurred. [0003] In the above-mentioned injection molding machine, the resin heated and melted in the heating cylinder is filled into the cavity space of the metal mold device, and cooled and solidified in the cavity space to form a molded product. For this reason, the metal mold device has a fixed mold and a movable mold, and the movable mold is moved forward and backward by a crank linkage mechanism of the mold clamping device, and the movable mold is brought into contact with and separated from the fixed mold, thereby closing the mold device. Mold, mold clamping and mold opening. [0004] In addition, in an electric mold cla...

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Problems solved by technology

[0021] In addition, with the mechanical "click" of the mold clamping device, etc., such as Figure 5 As shown, a time error occurs between the current detection value calculated from the actual detection current shown by the line L5 and the estimated current detection value shown by the line L6, and in this case, the current detection value becomes smaller than the reference The current value α(t) is large

[0022] In this way, when the current detection value becomes larger than the reference current value α(t) due to noise due to jitter m1, m2, high-frequency component m3, time error, etc., even though there is no clamp between the fixed die and the movable die Foreign objects can also be mistakenly judged as an abnormality in the injection molding machine

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