Manufacture of laminated glazing
AssigneeSaint-Gobain Glass France
InventorsStéphane Berard, Alexandre Hennion, Philippe Frebourg
Life of this patent
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Abstract
A process for manufacturing a bent laminated glazing, includes manufacturing a first bent laminated glazing including at least two glass substrates locally comprising, in each of the at least two glass substrates and facing each other in all the at least two glass substrates, a zone including compressive stresses, and cutting the first bent laminated glazing through its entire thickness along a line included in the zone in order to form local cut edges and, after cutting, a second bent laminated glazing with the local cut edges having compressive edge stresses.
Claims19
A process for manufacturing a bent laminated glazing, comprising:
- manufacturing a first bent laminated glazing comprising first and second glass substrates that are laminated to each other, the first bent laminated glazing having a peripheral edge with first compressive edge stresses, each of the first and second glass substrates comprising a local zone comprising second compressive stresses and extending outside the peripheral edge with the first compressive edge stresses, the local zone of the first glass substrate facing and being superposed with the local zone of the second glass substrate, and
- after manufacturing said first bent laminated glazing, cutting said first bent laminated glazing through its entire thickness along a line included in said local zone of each of the first and second glass substrates in order to form local cut edges having second compressive edge stresses outside the peripheral edge with first compressive edge stresses, the cutting of said first bent laminated glazing producing a second bent laminated glazing having said peripheral edge with the first compressive edge stresses and said local cut edges having the second compressive edge stresses,
- wherein the local zone in each of the first and second glass substrates that comprises the second compressive stresses is formed by applying a local cooling on the first and second glass substrates to introduce the second compressive stresses in each local zone, said local cooling being a faster cooling process than a general cooling of the first and second glass substrates that introduces the first compressive edge stresses.
A process for manufacturing a bent laminated glazing, comprising:
- manufacturing a first bent laminated glazing comprising first and second glass substrates that are laminated to each other, the first bent laminated glazing having a peripheral edge with first compressive edge stresses, each of the first and second glass substrates comprising a local zone comprising second compressive stresses and a periphery of the local zones being entirely surrounded by the peripheral edge of the first bent laminated glazing, the local zone of the first glass substrate facing and being superposed with the local zone of the second glass substrate, and
- after manufacturing said first bent laminated glazing, cutting said first bent laminated glazing along a line included in said local zone and entirely surrounded by the peripheral edge of the first bent laminated glazing in order to form local cut edges having second compressive edge stresses outside the peripheral edge with first compressive edge stresses, the cutting of said first bent laminated glazing producing a second bent laminated glazing having said peripheral edge with the first compressive edge stresses and said local cut edges having the second compressive edge stresses,
- wherein the local zone in each of the first and second glass substrates that comprises the second compressive stresses is formed by applying a local cooling on the first and second glass substrates to introduce the second compressive stresses in each local zone, said local cooling being a faster cooling process than a general cooling of the first and second glass substrates that introduces the first compressive edge stresses.
Dependencies are inferred from the claim text.