Modeling the process of polymers processing in twinscrew extruders
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 4, Issue 5
Abstract
<p>We developed a mathematical model of the process of polymer processing in co- and counter-rotating twin-screw extruders. The model takes into account a heat transfer of a polymer with screws and a barrel, as well as real boundary conditions (screws rotate, a barrel is stationary).</p><p>We used the model of the allocated C-shaped volume, which is limited by one turn of cutting of each of screws and in which contains a volume of the processed polymer is located, for the analysis of the process. The model gives possibility to describe the process of processing both in the case of complete and partial filling of an operation channel with processed material. This is especially important in the case of dosed feeding of an extruder with a polymer, which is typical for modern extrusion equipment.</p><p>We studied a temperature field of a polymer in operation channels of co- and counter-rotating twin-screw extruders and compared the results of the calculation with experimental data. We substantiated theoretically and confirmed experimentally, that, unlike in a single-screw extruder, it is necessary to heat operation elements firstly and to cool them then (in the direction from a loading funnel to an extrusion head) in a twin-screw extruder.</p><p>We used the developed technique successfully at the development of modes of processing of various polymeric materials on co- and counter-rotating twin-screw extruders with screws of a diameter of 125 and 83 mm, respectively.</p><p>The discrepancy between the calculated values and the experimental values of temperature at the outlet of a twin-screw extruder with co-rotation screws Ø83×30D does not exceed 10 %. The experimental value of the temperature somewhat exceeded the given value. We explain this by the fact that the system of thermal stabilization of working elements for the studied processing modes could not remove released heat of dissipation effectively.</p><p>Application of the developed mathematical model will give possibility to forecast effective modes of operation of twin-screw extruders better, especially at processing of materials with low thermal stability.</p>
Authors and Affiliations
Ihor Mikulionok, Oleksandr Gavva, Liudmyla Kryvoplias-Volodina
Keywords
Related Articles
- EP ID EP528078
- DOI 10.15587/1729-4061.2018.139886
- Views 55
- Downloads 0
Development of the positive engagement continuously variable transmission design with the application of graph theory
<p>Various designs of CVTs were explored from two points of view: analysis of the design itself and analysis of the methods and techniques, used in the process of creation of the CVT. To solve the problem of finding new...
Development of methodical provisions regarding the substantiation of the combat structure of forces for activities in the airspace
<p>The determining factor for success during modern warfare is the struggle for supremacy in the air. The main task for a defending side is to prevent the enemy's superiority in the air. Various means of destruction are...
Improving control efficiency in buffering systems using anticipatory indicators for demand forecasting
<p>Optimization of the stock management process is associated with the search for a forecasting model, a method for generation of a forecasting time series, a model of logistic operation, determining a reasonable level o...
Development of the procedure for integrated application of scenario prediction methods
<p>The paper proposes a procedure for the integrated application of methods for scenario analysis and prediction, represented by graphs of the «tree» type. The task on analysis of risks in software projects has been cons...
Modeling of dynamic stability of the well deepening process based on the catastrophe theory
<p>Theoretical aspects of the catastrophe theory were considered and the possibility of application of the catastrophe theory methods in estimation of actual data of geological and technical control of the well deepening...