The working process of a press machine can be considered relatively simple compared to the press-blow and blow-blow processes carried out using an IS machine. During the work on a press machine, when the glass gob reaches the mould (loading), the plunger uses its pressing force to oblige the glass to fill all the area between the same plunger, the ring, the mould and the bottom plate in the mini- mum time possible. At this point, in a single working phase, the glass item has been formed.
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