CENTRIFUGAL CASTING OF GLASS PLATES - A FINITE-ELEMENT ANALYSIS OF PROCESS PARAMETER INFLUENCE

For the first time, glass centrifugal casting is analyzed by finite-el ement viscoplastic models. First of all, the sensitivity of the proces s parameters is analyzed on the radius lengthening of a glass gob duri ng casting using central processing unit time-saving models. The suita bility of glass for centrifuging is evaluated, taking its temperature, viscosity, mould rotation speed and time dependency, casting time and initial gob shape into account. A refined finite-element analysis of an NBS-710 plate production is then achieved. The results are used in decision-aid process design curves which allow the manufacturer to eff iciently adjust process parameters with regard to the desired final sh ape.