کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1704067 1012398 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamic modelling of die melt temperature profile in polymer extrusion: Effects of process settings, screw geometry and material
ترجمه فارسی عنوان
مدل سازی پویا از مشخصات دمایی ذوب در اکستروژن پلیمر: اثر تنظیمات فرایند، هندسه پیچ و مواد
کلمات کلیدی
اکستروژن پلیمر، نظارت بر فرآیند، مشخصات دما ذوب، مدل سازی پویا، همگنی حرارتی، تنظیمات فرآیند
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
چکیده انگلیسی

Extrusion is one of the major methods for processing polymeric materials and the thermal homogeneity of the process output is a major concern for manufacture of high quality extruded products. Therefore, accurate process thermal monitoring and control are important for product quality control. However, most industrial extruders use single point thermocouples for the temperature monitoring/control although their measurements are highly affected by the barrel metal wall temperature. Currently, no industrially established thermal profile measurement technique is available. Furthermore, it has been shown that the melt temperature changes considerably with the die radial position and hence point/bulk measurements are not sufficient for monitoring and control of the temperature across the melt flow. The majority of process thermal control methods are based on linear models which are not capable of dealing with process nonlinearities. In this work, the die melt temperature profile of a single screw extruder was monitored by a thermocouple mesh technique. The data obtained was used to develop a novel approach of modelling the extruder die melt temperature profile under dynamic conditions (i.e. for predicting the die melt temperature profile in real-time). These newly proposed models were in good agreement with the measured unseen data. They were then used to explore the effects of process settings, material and screw geometry on the die melt temperature profile. The results showed that the process thermal homogeneity was affected in a complex manner by changing the process settings, screw geometry and material.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Mathematical Modelling - Volume 38, Issue 4, 15 February 2014, Pages 1224–1236
نویسندگان
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