非干渉化の手法を用いた射出成形機の加熱シリンダの温度制御

抄録

This paper describes some improvements into a temperature control of the heating cylinder of an injection moulding machine. The resin is molten by band heaters through the thick cylinder layer in the heating cylinder and the temperature of the resin should be controlled precisely in the heating and melting process.
In this paper, the heating process is described as an interactive system which is composed of some sequential heating process. The heat flow among the heating process is compensated by a decoupling method and the control system is designed in each decoupled process independently, considering the irreversible thermal characteristics of resin. At this time, a lumped parameter model of the heating cylinder is obtained by means of the finite element method and the design margin of the control system is expressed as a Gershgorin band.
on the other hand, the molten resin flow and the frictional heat are generated by the screw revolution intermittently in the heating cylinder. The intermittent process is modeled as a sampling system and the control design margin is obtained experimentally.
The effect of the new control method is verified by some experiments in conclusion. This research may be applied to other similar intermittent and distributed parameter process as a general method of control system.