Influence of glass/mould interfaces on sticking

Abstract

The sticking of glass on mould materials is a critical problem since it can lead to the Interruption of glass Container production. This study is a contribution to understanding the phenomena at the origin of sticking. The experiments involve loading and spreading glass gobs on flat metallic Substrates. They are performed directly on a glassmaking machine, thus the thermal conditions of the processes are simulated as closely as possible. Special attention is paid to characterizing the metal and glass surfaces before and after contact using a surface profilometer, AFM, and SEM with an EDX spectrometer. The influence on sticking of mould temperature, surface roughness and surface chemistry (nonoxidized, pre-oxidized and lubricated) is investigated.