UBA analysis of the process of pipe extrusion through a porthole die

1995 ◽  
Vol 49 (3-4) ◽  
pp. 371-385 ◽  
Author(s):  
J.X. Xie ◽  
K. Ikeda ◽  
T. Murakami
Keyword(s):  
Porthole Die ◽  
Pipe Extrusion

FEM simulation of welding quality in porthole die extrusion

2011 ◽  
Vol 26 (2) ◽  
pp. 292-295 ◽  
Author(s):  
Youfeng He ◽  
Shuisheng Xie ◽  
Lei Cheng ◽  
Guojie Huang ◽  
Yao Fu
Keyword(s):  
Fem Simulation ◽  
Welding Quality ◽  
Porthole Die ◽  
Die Extrusion ◽  
Porthole Die Extrusion

Elimination of Sag in Plastic Pipe Extrusion

1992 ◽  
Vol 7 (2) ◽  
pp. 140-143 ◽  
Author(s):  
D. N. Githuku ◽  
A. J. Giacomin
Keyword(s):  
Plastic Pipe ◽  
Pipe Extrusion

Experimental and Finite-Element Method Study of Zn-22Al Alloy Pipe Hot Extrusion Using a Porthole Die

2013 ◽  
Vol 22 (11) ◽  
pp. 3296-3305 ◽  
Author(s):  
X. P. Zhang ◽  
X. H. Dong ◽  
S. F. Feng ◽  
X. T. Hong ◽  
W. Tang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Hot Extrusion ◽  
Porthole Die ◽  
Element Method

Plastic pipe solidification in extrusion

2018 ◽  
Vol 38 (6) ◽  
pp. 591-603
Author(s):  
Pongthep Poungthong ◽  
Chanyut Kolitawong ◽  
Chaimongkol Saengow ◽  
Alan Jeffrey Giacomin
Keyword(s):  
Residual Stress ◽  
Cooling System ◽  
Outer Wall ◽  
Solidification Time ◽  
Solidification Temperature ◽  
Pipe Surface ◽  
Plastic Pipe ◽  
External Cooling ◽  
Wall Boundary Conditions ◽  
Pipe Extrusion

AbstractIn plastic pipe extrusion, hot molten extrudate emerges from an annular. This highly viscous liquid is then cooled and solidified, calledquenching, 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.

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