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Thermo-mechanical stresses in cast steel dies during glass pressing process

Abstract : Cast steels dies used in glass pressing process present dispersal in their lifetime in spite of apparently similar pressing parameters. These dispersal does not seems to be due to casting defects because every mold presents such defects. In order to know if undetectable variations of any process parameter could produce such lifetime dispersal, a finite element simulation of glass pressing process is here proposed. In this paper, glass is supposed to be a Newtonian fluid, cast steel is considered as a thermo-elastic material, thermal transfer between glass and mold depend only on time and radiative heat transfer in glass is taken into account by Rosseland diffusion approximation. The validation of the results of this simulation is made by comparison of the calculated pressing force to the experimental one. Although the experimental data introduced in the simulation does not have been measured in the industrial process, the order of magnitude of the calculated pressing force is similar to the real one.
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  • HAL Id : hal-01788416, version 1

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Gilles Dusserre, Fabrice Schmidt, Gilles Dour, Gérard Bernhart. Thermo-mechanical stresses in cast steel dies during glass pressing process. AMPT'2005 -8th International Conference on Advances in Materials and Processing Technologies, May 2005, Gliwice-WIsla, Poland. 4 p. ⟨hal-01788416⟩

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