| 摘要 |
PURPOSE:To prevent a molded part from unloading amiss and consequently a mold from breaking by a method wherein the position of the arm indicating the direction of the opening and closing of mold of an unloader is followed up to the set value of the forward position of said arm, which is determined by both the signal from a position-detecting sensor of mold and that from a bias setter serving as the relative position controller. CONSTITUTION:A position-detecting sensor in the opening and closing direction of mold (i), a signal converter (j) (which is necessary for closed loop control) of the position-detecting sensor (i) and a signal level converter (k) of the position-detecting sensor (i) are provided. In addition, a signal converter (l) of the opening and closing position of mold, a signal amplifier (m), the amplifier (n) for an actuator, the actuator (p) of the arm indicating the direction of the opening and closing of mold of an unloader, the arm (q) indicating the direction of the opening and closing of mold of the unloader, the position-detecting sensor (r) of the arm (q), a signal converter (s) (which is necessary for closed loop control) of the sensor (r) and a relative position control setter (t) are also provided. Thus, the movement of the opening and closing position of mold is detected and employed as the instruction value for controlling the position of the arm indicating the direction of the opening and closing of mold of the unloader of a molded part in order to correctly perform the positional control of the arm (q) indicating the direction of the opening and closing of mold. |
