Process Mechanisms of Single Screw Extrusion Dr Xueqin

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Process Mechanisms of Single Screw Extrusion Dr Xueqin (Amy) Liu Research Assistant Intelligent System

Process Mechanisms of Single Screw Extrusion Dr Xueqin (Amy) Liu Research Assistant Intelligent System & Control School of Electronics, Electrical Engineering & Computer Science

Presentation Outline • Standard set-up of SSE • Process mechanisms • Pressure development •

Presentation Outline • Standard set-up of SSE • Process mechanisms • Pressure development • Inferential Viscosity • Laboratory SSE Slide 2 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

Standard Set-up of Single Screw Extruder Slide 3 Xueqin Liu Mechanisms of Single Screw

Standard Set-up of Single Screw Extruder Slide 3 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

Process Analysis partially reproduced from Iqbal, 2010 • Identification/selection of manipulated variables, disturbance variables,

Process Analysis partially reproduced from Iqbal, 2010 • Identification/selection of manipulated variables, disturbance variables, and controlled variables is required for the proper design of control systems. Slide 4 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

Process Mechanisms Clamp-ring Adapter Reproduced from Tadmor and Klein, 1970 Slide 5 Xueqin Liu

Process Mechanisms Clamp-ring Adapter Reproduced from Tadmor and Klein, 1970 Slide 5 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

Pressure Development Slide 7 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

Pressure Development Slide 7 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

Pressure Drop Through the Die Slide 8 Xueqin Liu Mechanisms of Single Screw Extrusion

Pressure Drop Through the Die Slide 8 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

Inferential Viscosity • In-line rheometer • Viscosity calculated from pressure drop and throughput rate

Inferential Viscosity • In-line rheometer • Viscosity calculated from pressure drop and throughput rate (here linear with speed) – Slide 9 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

Inferential Viscosity • Can be achieved using suitable rheological model and appropriate rheological parameters

Inferential Viscosity • Can be achieved using suitable rheological model and appropriate rheological parameters • Provides initial estimate of material viscosity – Slide 10 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

Laboratory Single Screw Extruder Killion KTS-100, 25 mm SSE (1995) with in-line rheometer Slide

Laboratory Single Screw Extruder Killion KTS-100, 25 mm SSE (1995) with in-line rheometer Slide 11 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

References 1. Cogswell, F. N. , Polymer melt rheology: A guide for industrial practice.

References 1. Cogswell, F. N. , Polymer melt rheology: A guide for industrial practice. Abington: Woodhead Publishing Ltd, 1981. 2. Han, C. D. , What is the role of "pressure" in the use of capillary and slit flows to determine the shear-rate dependent viscosity of a viscoelastic fluid. Polymer engineering and science, 2008, 48(6): 1126 - 1140. 3. Liang, J. . Estimation of entry pressure drop during conical die flow of carbon black-filled rubber compound. Journal of Reinforced Plastics and Composites, 2004, 23(3): 1355 -1363. 4. Cogswell, F. N. , Measuring the extensional rheology of polymer melts. Transactions of the Society of Rheology, 1972, 16(3): 383 - 403. 5. C. Rauwendaal, Polymer Extrusion (4 th edition). Carl Hanser Verlag, Munich, 2001. Slide 12 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

References 6. Cogswell, F. N. , et al. , Converging Flow of Polymer Melts

References 6. Cogswell, F. N. , et al. , Converging Flow of Polymer Melts in Extrusion Dies. Polymer Engineering and Science, 1972, 12: 64 - 73. 7. Mc. Afee, M. (2005). A soft sensor for viscosity control of polymer extrusion. Phd thesis, Queen’s University Belfast. 8. M. H. Iqbal, U. Sundararaj, and S. L. Shah, “New approach to develop dynamic gray box model for a plasticating twin-screw extruder, ” Industrial & Engineering Chemistry Research, vol. 49, no. 2, pp. 648– 657, 2010. 9. X. Liu, K. Li, M. Mc. Afee, and J. Deng, “‘soft-sensor’ for real-time monitoring of melt viscosity in polymer extrusion process, ” in Decision and Control (CDC), 2010 49 th IEEE Conference on, 2010, pp. 3469 – 3474. 10. B. H. Maddock, “Measurement and analysis of extruder stability, ” SPE Journal, vol. 20, pp. 1277– 1283, 1964. Slide 13 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

Thank you for your attention Slide 14 Xueqin Liu Mechanisms of Single Screw Extrusion

Thank you for your attention Slide 14 Xueqin Liu Mechanisms of Single Screw Extrusion June 1, 2011

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