Abstract
The theory of disc extrusion in an inertialess approximation is considered using the example of a four-constant Oldroyd model. For the extrusion of melts and solutions of polymers attempts were made to use a so-called “disc” extruder (without an endless screw), whose principle of action is based on the Weissenberg effect. This method for the extrusion of melts was first studied experimentally in [1]. In [2] an experiment was made on solutions of polymers. an expression for the capacity of an extruder was obtained theoretically in [3], using an energy approach. The article does not give a correct qualitative picture, and the divergence between the quantitative and experimental results reaches two orders of magnitude.
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Literature Cited
B. B. Maxwell and A. J. Scalor, “The elastic melt extruder-works without screw,” Mod. Plastics,37, No. 2 (1959).
Y. Tomita and H. Kato, “A study on the elastodynamic pump (1st Report, Normal Stress Effect),” Bull. JSME,10, No. 39 (1967).
H. Kato, “A study on the elastodynamic pump (2nd Report, Pump Performance),” Bull. JSME,10, No. 39 (1967).
J. G. Oldroyd, “Non-Newtonian effects in steady motion of some idealized elastico-viscous liquids,” Proc. Roy. Soc.A-245, No. 1241 (1958).
G. V. Vinogradov and A. Ya. Malkin, “Rheological properties of polymers in a flowing state,” Prikl. Mat. i Tekh. Fiz., No. 5 (1964).
Additional information
Moscow. Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 1, pp. 169–176, January–February, 1972.
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Prokunin, A.N. The theory of the disc extrusion of polymers. Fluid Dyn 7, 153–159 (1972). https://doi.org/10.1007/BF01205383
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DOI: https://doi.org/10.1007/BF01205383