Effect of Viscous Flow Activation Energy on the Gas-Assisted Extrusion Forming of Plastic Micro-Tube

7th Annual International Conference on Materials Science and Engineering

Ren, Zhong^1 ; Huang, Xingyuan^2

Key Laboratory of Optic-Electronic and Communication, Jiangxi Science and Technology Normal University, Nanchang

330038, China^1

School of Mechanical and Electrical Engineering, Nanchang University, Nanchang

330031, China^2

关键词: Axial velocity;    Extrusion forming;    Geometric modeling;    Radial velocity;    Three phase;    Viscosity distribution;    Viscosity of melts;    Viscous flow activation energy;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/562/1/012125/pdf
DOI  :  10.1088/1757-899X/562/1/012125

来源: IOP

【 摘 要 】

In this paper, the effect of viscous flow activation energy on the gas-assisted extrusion (GAE) forming of the plastic micro-tube was investigated by numerical method. The three-phase fluids geometric model was built and same boundary conditions were imposed in the model. Under different viscous flow activation energies (VFAE), the influence of VFAE on the size changes of plastic micro-tube in the GAE were obtained. Moreover, the flow velocities, pressure, temperature, and viscosity distributions of melt were also gotten and analyzed. Results show that with the increase of viscous flow activation energy, the inner and outer radiuses all synchronously increase due to the increase of radial velocity and axial velocity. In addition, the temperature distribution slightly increases, which results in the decrease of the pressure and viscosity of melt.