Patent ID: 6398536
Filing Date: 2002-06-04
Classification: B29C

Abstract:
A molded product ejection checking device combined with an ejecting device for ejecting a molded product in an injection molding machine, wherein the ejecting device is provided with an ejecting pin driven by a motor which is controlled by a servo controller, a torque of the motor being obtained from a torque command from the servo controller, the molded product ejection checking device comprising:a sampling device for sampling a torque waveform of the ejecting device to produce a detected waveform when the molded product is ejected; a memory device for memorizing the torque waveform of the ejecting device when the molded product is normally ejected as a normal waveform; and a controlling device for judging if the molded product is normally ejected or not according to the comparative result obtained by comparing the normal waveform with the detected waveform.