To design an extruder screw for a given polymer, the barrel length for melting is needed for a given flow rate and speed. The melting rate needed for calculating the length is given through the conservation laws in cylindrical coordinates based on defined fundamental average parameters. Extrusion machine data are used to calculate the functions of the parameters. Results based on polyethylene data are given.
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References
1.
1. Tadmor, Zehev and I. Klein, Engineering Principles of Plasticating Extrusion, Van Nostrand Reinhold Company, 1970, pp. 79-183.
2.
2. Donovan, R. C."A Theoretical Melting Model for Plasticating Extruders,"Polymer Engineering and Science, May, 1971, Vol. 11, no. 3, pp. 247-257.
3.
3. Vermeulen, J. R., Ph.M. Gerson, and W. J. Beek, "The Melting of a Bed of Polymer Granules on a Hot Moving Surface,"Chemical Engineering Science, 1971, Vol. 26, pp. 1445-1455.
4.
4. Chung, C. I., W. J. Hennessey, and M. H. Tusim, "Frictional Behavior of Solid Polymers on a Metal Surface at Processing Conditions,"Polymer Engineering and Science, Vol. 17, no. 1, January 1977,pp.9-20.
5.
5. Mount, E. M. III, J. G. Watson and C. I. Chung, "Analytical Melting for Extrusion: Melting Rate of Fully Compacted Solid Polymers,"Polymer Engineering and Science, August, 1982, Vol. 22, no. 12, pp. 729-737.
6.
6. Lindt, J. T., "Mathematical Modeling of Melting of Polymers in Single Screw Extruders: A Critical Review,"Conference Proceedings, ANTEC '84, Society of Plastics Engineers, 1984, pp. 73-76.
7.
7. Rauwendaal, C., "Dispersed Solids Melting Theory,"Conference Proceedings, ANTEC '93, Society of Plastics Engineers, 1993, pp. 2232-2237.
8.
8. Miller, J. D. and D. H. White, "Heat Transfer in the Transition Section of a Plasticating Extruder,"Conference Proceedings, ANTEC '74, Society of Plastics Engineers, 1974, pp. 243-246.
9.
9. Derezinski, S. J., "Compressibility of the Resin Solid Feed Bed in Extrusion,"Conference Proceedings, ANTEC '88, Society of Plastics Engineers, 1988, pp. 105-108.
10.
10. Derezinski, S. J."Calculating Power of Extruder Melt Sections,"Journal of Materials Processing & Manufacturing Science, Vol. 6, no. 1, July 1997, pp. 71-77.
11.
11. Derezinski, S. J."Heat Transfer Coefficients in Extruder Melt Sections,"Conference Proceedings, ANTEC '96, Society of Plastics Engineers, 1996, pp. 417-421.
12.
12. Derezinski, S. J., "Control Volume Analysis of Feed Flow in Extruders,"Conference Proceedings, ANTEC '98, Society of Plastics Engineers, 1998, pp. 142-147.
13.
13. Kim, Y. S., C. I. Chung, S. Y. Lai, T. I. Butler and K. S. Hyun, "Melting Behavior of Different Types of Low Density Polyethylenes and Screw Design Considerations,"Conference Proceedings, ANTEC '96, Society of Plastics Engineers, 1996, pp. 216-221.
