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AssigneeSaint-Gobain Vitrage
InventorsMichael Balduin, Hubert Havenith, Michael Labrot
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The present document describes a process for manufacturing a pane of laminated glass without recourse to an autoclave. The pack of layers are composed of stacked layers (6, 7, 8), is raised to the softening temperature of the thermoplastic interlayer of the pack of layers in a preheat channel (1). The preheated pack of layers is put under vacuum in a vacuum assembly station (2) for the purpose of extracting the gas from the spaces separating the layers (6, 7, 8). After the gas has been extracted, the edge of the pack of layers, which is held under vacuum, is mechanically compressed inside the vacuum box and is thus sealed. Finally, the pack of layers is brought to atmospheric pressure and its temperature further increased in a postheat channel (4).
Process for the manufacture of a pane of laminated glass comprising at least one external layer of glass and at least one interlayer of thermoplastic polymer, in which the various layers are stacked, the pack of layers is put under vacuum in a vacuum box for the purpose of extracting gas from the spaces separating the layers and, finally, the pack of layers is brought to atmospheric pressure and its temperature increased, characterized in that the pack of layers is first of all heated to a temperature close to the softening temperature of the thermoplastic polymer, in that the gas is extracted from the spaces separating the layers of the pack of layers directly through those edges of the pack of layers which are not covered, due to the effect of the pressure which exists inside the vacuum box, and in that, after completing the extraction of the gas, the edges of the pack of layers are, for the purpose of sealing them, bonded inside the vacuum box by means of mechanical pressure exerted around the edge of the pack of layers.
Dependencies are inferred from the claim text.