Beeldcultuur, een drieluik.I: Deconstructie van het fenomeen culturele studies

An important process in glass manufacture is the forming of the product. The forming process takes place at high rate, involves extreme temperatures and is characterised by large deformations. The process can be modelled as a coupled thermodynamical/mechanical problem including the interaction between glass, air and equipment. In this paper a general mathematical model for glass forming is derived, which is specified for different forming processes, in particular pressing and blowing. The model should be able to correctly represent the flow of the glass and the energy exchange during the process. Various modelling aspects are discussed for each process, while several key issues, such as the motion of the plunger and the evolution of the glass-air interfaces, are examined thoroughly. Finally, some examples of process simulations for existing simulation tools are provided

Modeling the blow-blow forming process in glass container manufacturing : a comparison between computations and experiments

The blow-blow forming process is a widely used technique in glass container manufacturing (e.g. production of glass bottles and jars). This process typically takes few seconds and is characterized by large deformations and temperature gradients. In [1] the development of a computer simulation model for glass blowing was presented and demonstrated on dummy problems with an initially uniform glass temperature. The objective of this paper is to extend and further develop the simulation model to be used for industrial purposes. To achieve this both steps of the blow-blow forming process of glass containers are simulated and tested against real industrial problems. In this paper a non-uniform temperature distribution is considered for the blowing of the preform, which is reconstructed from temperature data provided by industry. The model is validated by means of several examples regarding conservation properties, behaviour of the flow and comparison of the glass thickness with experimental measurements. Furthermore, by means of these examples the sensitivity of the glass thickness to inaccuracies in the measurement and reconstruction of the initial temperature distribution is verified

Mathematical modelling of glass forming processes

An important process in glass manufacture is the forming of the product. The forming process takes place at high rate, involves extreme temperatures and is characterised by large deformations. The process can be modelled as a coupled thermodynamical /mechanical problem with corresponding interaction between glass, air and equipment. In this paper a general mathematical model for glass forming is derived, which is specified for different forming processes, in particular pressing and blowing. The model should be able to correctly represent the flow of the glass and the energy exchange during the process. Various modeling aspects are discussed for each process, while several key issues, such as the motion of the plunger and the evolution of the glass-air interfaces, are examined thoroughly. Finally, some examples of process simulations for existing simulation tools are provided