| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus capable of automatically controlling the necessary minimum mold clamping force of an injection molding machine without being influenced by the skillfulness of an operator. SOLUTION: In a mold clamping force control method of an injection molding machine using a toggle closing both of a movable mold and a fixed mold and injecting and charging a molten resin in the mold cavity formed by both molds to obtain a molded article, on the basis of the relation between effective mold clamping force, which is obtained by operating the detection value obtained by detecting the mold clamping force applied to the molds during a mold clamping force holding period by a mold clamping force detecting means, and the set mold clamping force, which is obtained by operating the position of a crosshead at a time of the mating state of both molds under a dry cycle state and the detection value obtained at this time, the position of the crosshead is controlled so that the mold clamping force obtained by subtracting the set mold clamping force from the effective mold clamping force enters an arbitrary allowance range to apply constant mold clamping force to both molds during a mold clamping period.
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