ATTACHMENT FOR INJECTION-MOLDING MACHINES

摘要

An attachment to injection-molding machines for removing threaded cores from pieces molded therein has a motor connected to a hollow spindle so as to rotate the same. The hollow spindle either transmits the torque from the motor to at least one threaded core or to a drive spindle which in turn transmits the torque to a threaded core. The spindle has an outer surface defining a thread section. A stationary switch element is provided for a respective one of a pair of adjustable switching cam means which are arranged on the outer periphery of a scale disc connected to the hollow spindle for rotation therewith. The setting of the cams via the cooperation with the switch element determines the start and finish of a core removal cycle.