Radial Orientation Mechanism and Research of Short Fiber in Extrusion Die

Abstract:

Combining with Jeffery equation and mechanics model of fixed point of Euler rigid body, research was done to study the mechanism and method of the short fiber radial orientation and characteristics of movement in tread extrusion process. The influence of tension flow field and shear flow field in flow channel on short fibers orientation has been systemically analyzed by flow characteristics of the tread during the extrusion process and combining with Jeffery equation and mechanics model of fixed point of Euler rigid body. The result show that the expansion ratio and the expanding angle of cross section are the key factors to determine the radial orientation of short fiber. Mathematical model of short fiber radial orientation was established. The extrusion die, which has a hinder dam by adopting such principle has been designed. The result also show that the best expansion ratio was 3-4, obtaining the average orientation angle between 70o-80o. and the rationality of the radial oriented mechanism and the mathematical model are verified.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 2271-2279
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.2271
• Online since: February 2012
• Authors: Cai Jun Liu
• Keywords: Expansion Angle, Expansion Ratio, Extrusion, Radial Orientation, Short Fiber

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