SPE Library

The SPE Library contains thousands of papers, presentations, journal briefs and recorded webinars from the best minds in the Plastics Industry. Spanning almost two decades, this collection of published research and development work in polymer science and plastics technology is a wealth of knowledge and information for anyone involved in plastics.

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Conference Proceedings
Determining Apparent Melt Viscosity by Cavity Pressure
S. Horváth | A. Szücs
The online measurement of the viscosity of the polymer melt may contribute to the production of excellent products. The supervisory system of injection molding machines can only provide limited feedback on the processes in the cavity, therefore measuring the pressure in the mold contributes to the supervision of quality. The goal of our research is to gain more knowledge about the filling process and to determine the apparent viscosity of the material in the filling phase. For the research eight pressure sensors per cavity were built into an experimental specimen mold. Varying the wall thickness, the apparent viscosity was determined at different melt speeds. In the filling phase, non-isothermal and non-adiabatic flow were examined, they were considerably different from the environment of standard measuring equipment. The results were validated with a Göttfert capillary rheometer. They showed good agreement in a certain speed range and wall thickness when PP was used.

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Any article that is cited in another manuscript or other work is required to use the correct reference style. Below is an example of the reference style for SPE articles:

Brown, H. L. and Jones, D. H. 2016, May.
"Insert title of paper here in quotes,"
ANTEC 2016 - Indianapolis, Indiana, USA May 23-25, 2016. [On-line].
Society of Plastics Engineers
Available: www.4spe.org.

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