PROCESS FOR THE PRECISION MOULDING OF GLASS MANUFACTURED ARTICLES WITH GREAT SIZES, IN PARTICULAR LENSES

A process for the precision moulding of glass manufactured articles, in particular glass lenses with great sizes and thickness, characterized by reduced surface roughness and high geometrical precision of the shapes, providing a phase wherein one controls actively the geometry of a glass spindle wit...

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Bibliographic Details
Main Authors LANZARA GIOVANNI, TULLI CARLO, D'OVIDIO GINO, FEMIA GIUSEPPE
Format Patent
LanguageEnglish
Published 05.06.2014
Subjects
CHEMISTRY
GLASS
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
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Summary:A process for the precision moulding of glass manufactured articles, in particular glass lenses with great sizes and thickness, characterized by reduced surface roughness and high geometrical precision of the shapes, providing a phase wherein one controls actively the geometry of a glass spindle with temperature higher than or equal to its working temperature by means of a mould, and wherein subsequently the temperature and the shape of the spindle during the cooling phase is controlled actively, so that the manufactured article reaches uniformly and in all its volume a single temperature Td, not lower than its glass transition temperature.
Bibliography:Application Number: US201214112070