Plastic pipe solidification in extrusion-Reference-Cited by-同舟云学术

Plastic pipe solidification in extrusion

Published:2018-01-10 Issue:6 Volume:38 Page:591-603
ISSN:2191-0340
Container-title:Journal of Polymer Engineering
language:en
Short-container-title:

Author:

Poungthong Pongthep¹,Kolitawong Chanyut¹,Saengow Chaimongkol¹²³,Giacomin Alan Jeffrey³⁴

Affiliation:

1. Mechanical and Aerospace Engineering Department, Polymer Research Center , King Mongkut’s University of Technology North Bangkok , Bangkok 10800 , Thailand

2. College of Integrated Science and Technology , Rajamangala University of Technology Lanna , Doisaket, Chiangmai 50220 , Thailand

3. Chemical Engineering Department , Polymers Research Group, Queen’s University , Kingston , ON K7L 3N6, Canada

4. Mechanical and Materials Engineering Department , Queen’s University , Kingston, ON K7L 3N6 , Canada

Abstract

Abstract In plastic pipe extrusion, hot molten extrudate emerges from an annular. This highly viscous liquid is then cooled and solidified, called quenching, in a quench tank. In this paper, we focus on the external cooling system. We use an adiabatic inner wall and differing outer wall boundary conditions: isothermal and convection. The solid-liquid interface, at the solidification temperature, moves inward with deceleration. We adimensionalize the energy balance and solve for the interface speed in terms of the solidifcation coefficient, λ. We arrive at the exact solutions for the evolving solidified thickness. Finally, we use the residual stress model developed by Jansen [Int. Polym. Proc. 1994, 9, 82–89]. to predict the compressive residual stress at the outer pipe surface. Our new exact solution for the solidification time agrees well with the data from the plastic pipe industry. The goals of this paper are to help plastics engineers calculate the solidification time, to design the cooling chamber and to predict the residual quenching stress.

Publisher

Walter de Gruyter GmbH

Subject

Materials Chemistry,Polymers and Plastics,General Chemical Engineering

Link

https://www.degruyter.com/document/doi/10.1515/polyeng-2017-0164/pdf

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