Origin configuration manner of closing device of injection molding machine and control manner null of closing device of injection molding

摘要

PURPOSE:To improve positioning characteristics, realize high speed movement by high hydraulic pressure and obtain highly accurate and favorable mold clamping characteristics by a method wherein the detection of position to total stroke is executed with a positional scale and the relative positional detection between a movable base and a movable platen is executed with the encoder annexed to an AC servo motor. CONSTITUTION:The position of a movable platen base 12 is detected with a scale 30, while the relative position of a main movable platen 13 to the movable platen base 12 is detected with the encoder signal of an AC servo motor 26. in the scale 30, the origin of a mold clamping ram before driving is taken as the scale value of zero and the scale value is taken to the right as the positional detected value to the total stroke. Further, on the coordinate of the main movable platen 13, the output of the encoder under the condition that the movable platen base 12 and the main movable platen 13 are brought into tight contact close limit with each other is taken as an origin or zero.