ERROR-MONITORING METHOD OF INJECTION MOLDING MACHINE

摘要

PROBLEM TO BE SOLVED: To achieve the enhancement of production efficiency and the reduction of a production cost by dispensing with excessive work for monitoring when the error related to a screw to which a back flow preventing valve is provided is monitored and to reduce molding failure by avoiding the adverse effect on molding quality.;SOLUTION: After the completion of a metering main processing process Sa for performing metering by forwardly rotating a screw 3, the screw 3 is set to a free rotation state to be advanced and moved and, when the rotation of the screw 3 due to advance movement comes to a stop state, the advance movement of the screw 3 is stopped and the predetermined physical quantities Xx, θx, Xy, θy, Tr and Tx related to the advance movement are detected. When the monitor quantities (Xy-Xx), (θy-θx), Tr and Tx based on the detected physical quantities exceed preset monitor widths Xz, θz, Trz and Txz, predetermined error processing is performed.;COPYRIGHT: (C)2007,JPO&INPIT