Upper Austria University of Applied Sciences Research and Development Ltd. Influence of Thermal Material Properties on the Heating Step of Pipe Belling Simulation of the heating phase in the manufacturing of belled pipe ends of thermoplastic sewer pipes J. F. Pühringer , G. Zitzenbacher
26
Embed
Influence of Thermal Material Properties on the Heating …research.fh-ooe.at/files/publications/1123_Puehringer... · · 2016-01-18Upper Austria University of Applied Sciences
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Upper Austria University of Applied Sciences Research and Development Ltd.
Influence of Thermal Material Properties on the
Heating Step of Pipe Belling
Simulation of the heating phase in the manufacturing of belled pipe ends of thermoplastic sewer pipes
J. F. Pühringer, G. Zitzenbacher
Upper Austria University of Applied Sciences Research and Development Ltd. page 2
Content
Introduction
Physical and Mathematical Model
Parameter Study-Motivation-Procedure-Variation of material-Variation of material parameters
Summary
Upper Austria University of Applied Sciences Research and Development Ltd. page 3
Introduction: What is Pipe Belling?
sewer pipes
corrugated pipes
Pipe Belling is the formation of bells or sockets at sewer pipes or corrugated pipes for drainage or pipe fittings.
Upper Austria University of Applied Sciences Research and Development Ltd. page 4
Introduction:Process steps of Pipe Belling
Heating of the pipe end to processing temperature
Rubber elastic state of material
Formation of the pipe bell or socket
Cooling
Demoulding
Upper Austria University of Applied Sciences Research and Development Ltd. page 5
Introduction:Heating Process
relevant wavelength interval: 1 to 8 µm
radiation heating
The heating of the pipe end to forming temperature is done by:
of the pipe belling and the socket formation
radiator
HT
convection cooling
contact heating
Upper Austria University of Applied Sciences Research and Development Ltd. page 6
Introduction: The Equipment
mandrel
source: homepage HMS Schnallinger, Austriahttp://www.hms-schnallinger.com/
Upper Austria University of Applied Sciences Research and Development Ltd. page 26
( ) ( ) ( ) ( ) ( ) ( )trQr
trTrTrrt
trTTcT p ,,1,+⎟
⎠⎞
⎜⎝⎛
∂∂⋅⋅
∂∂
⋅=∂
∂⋅⋅ κρ
Summary Parameter Study with the SIMULATION TOOL
• Material
-10 K-30 KPP extrusion grade
680°C580°CPP homopolymer
α = 30 W/(m²K)α = 5 W/(m²K)material
• optical penetration depth p(λ): minimum for times / maximum for temperature
pcC ⋅= ρ
nearly linear dependence on time quantities and temperature difference with different slopes
• density ρ
• specific heat capacity cp
• heat conductivity κ
variation by +/- 20%
• reflection R(λ): slight positive slope for times / slight negative slope for temperature
}
Upper Austria University of Applied Sciences Research and Development Ltd. page 27
Acknowledgements
Financial support for this work was provided by the Local Govern-ment of Upper Austria with the frame-work of the funding program “Kunststoffstandort Oberösterreich”.
We also thank and acknowledge the contribution of our colleagues and of the Austrian Solar Innovation Centre in Wels for providing equipment and assistance for the measurements.
Upper Austria University of Applied Sciences Research and Development Ltd. page 28