| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure controller which operates an operation body through a power transmitting means by a servomotor, controls force applied to a pressure body exactly without using a load cell etc., simplifies the constitution of a machine, and obtains reliability. SOLUTION: The controller (controlling means) 15 of an electric injection molding machine 1 which controls injection pressure by an injection screw 5 by applying the force to the injection screw 5 (pressure receiving body) by operating a ball screw shaft 8, a ball nut 9, and a support 6 through a pulley 10 and a timing belt (belt) 13 by the servomotor 11 has an observer 19 which is built in relation to the control model of the electric injection molding machine 1 and estimates force generated by the injection screw 5 and an injection pressure feedback control part 20 which inputs force estimated by the observer 19 by a current command I to the servomotor 11 and the rotational positionθof a pulse encoder 14 and feedback-controls force to be acted on the injection screw 5. COPYRIGHT: (C)2006,JPO&NCIPI
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