| 摘要 |
A mold-clamping force is detected based on an output from a strain detection apparatus ( 30 ) provided to a mold-clamping apparatus of a molding machine. A first output value output from the strain detection apparatus ( 30 ) is detected when the mold-clamping apparatus is in a maximum mold open state. A second output value output from the strain detection apparatus ( 30 ) is corrected based on the first output value when a mold-clamping force is generated by the mold-clamping apparatus. The mold-clamping force is acquired based on the corrected second output value. A correction is made after converting an output from the strain detection apparatus ( 30 ) into a digital value, or a strain gauge ( 50 ) is used so as to change a reference voltage supplied to a comparison amplifier of the strain gauge using the strain gauge based on the first output value.
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