鋳物の型ばらし終了判定システム

抄録

  Results of the wavelet analysis of noise generated during the shake-out of iron castings using self-hardening mold showed that the frequency spectrum right after the start of shake-out is close to that of the consolidated vibration of the shake-out machine and molding flask. On the other hand, after shakeout completes, the frequency spectrum closely resembles the characteristic frequency of the molding flask.
  Based on these analytical results, we developed a measurement system for determining the shake-out ending time. The measurement system consists of a filter, rectifier, differential, AND circuit and amplifier. We determined the ending time of the shake-out process using this system by applying noise as its input. The obtained results agreed well with that obtained by visual inspection.