Modeling of the residence time distribution in a buss kneader with a back‐propagation neural network

Abstract

With a back-propagation neural network, the residence time distribution (RTD) characteristics in a buss kneader were modeled on a series of experimental RTD data measured by a digital image processing method. The operating conditions (screw speed and feed rate) were chosen as the inputs of the network. The four-layered backpropagation neural network predicted not only the RTD character indices, including the shortest delay time, mean residence time, and variance of distribution, but also the complete RTD curve. On the basis of the mean residence time, the average degree of fill in the extruder was also calculated. Furthermore, the effects of the operating conditions on the RTD and average degree of fill were analyzed. The method provided herein can also be used to predict RTDs in other kinds of extrusion equipment.

A New In‐line Optical System for Monitoring Residence Time during Polymer Processing Along a Twin‐Screw Extruder

“…[7] This type of RTD measurement that requires prior collection and preparation of the material to be analyzed, known as offline, is more laborious, generates low sampling rates and may not be as accurate. [8] Therefore, many real-time measurement techniques have been developed using a variety of analyzes, [9] such as ultrasound, [10,11] light reflection, [12,13] light transmission, [14] electrical conductivity, [15] fluorescence [16,17] and UV/Vis. [18] However, most of these techniques require drilling some part of the extruder and some are still laborious and expensive.…”

Optimization of Serial Modular Continuous Mixing Process Parameters for Natural Rubber Composites Reinforced by Silica/Carbon Black

“…However, achieving acceptable performance also wastes energy and time [13][14][15][16][17][18][19]. In recent years, many scholars and companies have contributed to developing continuous mixers, such as the Farrell continuous mixer, the twin-shaft continuous mixer, the Buss Kneader continuous mixer, and the co-rotating twin screw continuous mixer [20][21][22][23]. Nevertheless, due to the structural limitations of the feeding port of the above continuous mixers, only powdery and granular materials are able to be added, except for block rubber.…”