Effects of Vibration Force Field on Extensional Stress of Polymer Melt in Contraction Die

Abstract:

Electromagnetic dynamic plasticating extrusion, as one of main novel forming methods, has many important benefits to the forming process and the properties of its products. Here a visualization technique of flow induced birefringence was used to study the effects of the vibration parameters of screw on the extensional stress in contraction die. It is shown that , the extensional stress vibrate with the screw vibration at the same frequency; the amplitude of the extensional stress increases with the amplitude of the screw increasing; the average extensional stress at dynamic extrusion is less than that without vibration force, and it decreases with the screw vibration frequency or amplitude increasing.

• Periodical: Advanced Materials Research (Volumes 311-313)
• Pages: 1114-1117
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.311-313.1114
• Online since: August 2011
• Authors: Ji Chang Fan, Xiang Fang Peng
• Keywords: Contraction Flow, Extension Stress, Extrusion Forming, Polymer Melt, Vibration Force Field

References

[1] J.P. Qu, Y.H. Feng, X.F. Peng: Polym Bull Vol. 10(2008) , p.1.

[2] D.C. He, Z.H. Zhang ,Z.L. Peng: Plastics Manufacture Vol. 4 (2006), pp.64-30(in Chinese).

[3] J.P. Qu: J S China Univ Tech Vol. 20( 1992), pp.1-30(in Chinese).

[4] S.A. White, D.G. Baird: J Non-Newton Fluid Vol. 29(1988), 245.

[5] H. Janeschits-Kriegl: r Melt Rheology and Flow Birefringence New-York: Springer-Verlag , (1983).

[6] M.T. Martyn, C. Nakason, P.D. Coates: J Non-Newton Fluid Vol. 91 (2000), 123.

[7] L.M. Quinzani, R.C. Armstrong, R.A. Brown: J Non-Newton Fluid Vol. 52(1994), 1.

[8] M.T. Martyn, D.J. Groves, P.D. Coates: Plastics, Plast Rubber Compos Vol. 29(2000), 14.