SYSTEM FOR CONTROLLING THE SPEED OF INJECTION SHAFT OF AN INJECTION MOLDING MACHINE.

摘要

PCT No. PCT/JP85/00497 Sec. 371 Date Apr. 29, 1986 Sec. 102(e) Date Apr. 29, 1986 PCT Filed Sep. 4, 1985 PCT Pub. No. WO86/01455 PCT Pub. Date Mar. 13, 1986.A velocity control system for the injection shaft of an injection molding machine is adapted to drive an injection shaft (2'') by an electric motor (20) and to control the electric motor (20) by a numerical control unit (30). The final position of the injection shaft (2'') and the reference velocity of the injection shaft are commanded by data of a single block, and the velocity of the injection shaft (2'') at each commanded position is obtained by correcting the reference velocity by means of a feedrate override value using an override table. Accordingly, an instruction of a single block suffices as an instruction for a single injection operation, thus simplifying CNC data processing.