単軸押出機における押出量の推定機構の開発

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  • Development of Extrusion Rate Estimator for a Single Screw Plasticating Extruder.
  • タンジク オシダシキ ニ オケル オシダシリョウ ノ スイテイ キコウ ノ カ

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説明

The plasticating extruder has a wide range of applications in the polymer processing industry. It is very important in stabilizing the extrusion rate to achieve high-quality products and high productivity.<BR>In processing however, the extrusion rate cannot be measured on-line. To control the extrusion rate and to produce high-quality products, it is necessary to have an estimator, currently unavailable in the industry, which can predict the extrusion rate by secondary measured variables, such as the rotation speed of the screw, the temperature of the cylinder, or the pressure of the cylinder.<BR>In this paper, we deal with the behavior of the extrusion rate and the problems concerned with building such an estimator. By applying the methods of multivariate statistical analysis and time series analysis to experimentally obtained data, relationships between the extrusion rate and the other variables of the extruder were made clear and a static/dynamic model for predicting the extrusion rate was developed. The estimator consists of two parts. The first is a steady element that can calculate the average extrusion rate ; the other is a dynamic element that can predict the dynamic behavior of the extrusion rate, which fluctuates around the value given by the steady element. Some simulations were performed to validate the estimator's predictability.

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