Sag in Plastic Pipe Extrusion

Problems with sag in plastic pipe extrusion? This videotaped classroom lecture summarizes the state of the art. Produced in 1998 with the Engineering Outreach Program, this tape of one of Professor Giacomin's ME417 lectures brings plastics engineers quickly up to speed, helping them tackle challenging sag problems.

This 45 minute lecture is available in any format. To purchase it, send your check or money order to:

Make your check or money order payable to the University of Wisconsin-Madison, (Federal Tax Identification Number 39-600 6492W), in the amount of $250 U.S. per videotape. Be sure to state your desired format.

More on sag in plastic pipe extrusion at:

• Githuku, D.N. and A.J. Giacomin, "A Spectral Element Simulation of Gravitational Flow During Plastic Pipe Extrusion," Journal of Engineering Materials and Technology, 115(4), 433-439 (October, 1993).
• Githuku, D.N. and A.J. Giacomin, "Elimination of Sag in Plastic Pipe Extrusion," International Polymer Processing, VII(2), 140-143 (June, 1992).
• Githuku, D.N. and A.J. Giacomin, "Simulation of Slump in Plastic Pipe Extrusion," Journal of Engineering Materials and Technology, 114(1), 81-83 (January, 1992).
• Githuku, D.N. and A.J. Giacomin, "Heat Transfer Considerations in Gravitational Flows During Plastic Pipe Extrusion," Proc., First International Conference on Transport Phenomena in Processing, Pacific Institute for Thermal Engineering, Honolulu, HI (March 22-26, 1992), S.I. Guceri, ed., Technomic Publishers Inc., Lancaster, PA (1992), pp. 997-1012.
• Githuku, D.N., "Simulation of Sag in Plastic Pipe Extrusion," PhD Thesis, Texas A&M University, Mechanical Engineering Dept., College Station, TX (February, 1992).
• Giacomin, A.J., Habinak, T. and Doshi, S.R. "Dies for Pipe Extrusion Which Compensate for Gravity Flow," Proceedings, Polymer Processing Society, Fourth Annual Meeting, Orlando, FL (May 8-11, 1988), p. 4/15.
• Giacomin, A.J. and Doshi, S.R. "Analysis of Slump in Plastic Pipe Extrusion," S.P.E. Tech. Paper, XXXIV, Society of Plastics Engineers, Proc. 46th Annual Tech. Conf. & Exhib., Atlanta, GA (April, 1988), pp. 38-40.
• Pittman, J.F.T., G.P. Whitham, S. Beech and D. Gwynn, "Cooling and Wall Thickness Uniformity in Plastic Pipe Manufacture: An Experimental Study and Computer Simulations," International Polymer Processing, IX, 130-140 (1994).
• Pittman, J.F.T., I.A. Farah, D.H. Isaac and A. Eccott, "Spray Cooling Heat Transfer Coefficients in Plastic Pipe Manufacture," Plastics Rubber and Composites Processing and Applications, 24, 123-129 (1995).
• Pittman, J.F.T., G.P. Whitham and I.A. Farah, "Wall Thickness Uniformity in Plastic Pipes - Computer Simulations of the Effectiveness of Die Mandrel Off-Setting and Pipe Rotation in Combating Sag," Polymer Engineering and Science, 35, 921-928 (June 1995).
• Mapleston, P., "Novel Internal Pipe-Cooling System Boosts Output and Efficiency of Extrusion Lines," Modern Plastics, 26-27 (September 1999).
• Backman, M., E.-L. Heino, S. Johansson, J. Laurell, A. Lehtinen, J. Lindroos, M. Ora, E. Ribarits, T. Sihvonen, and J. Aarila, Polymer composition for pipes, USP 6,441,096 (August 27, 2002).

Last Modified: Wednesday, 23-Feb-2005 02:05:07 CST This website is copyrighted. Address comments to rheology@engr.wisc.edu