Method and lift jet floatation system for shaping thin glass

Abstract

Disclosed herein are systems for shaping a glass sheet comprising a roll conveyor comprising a plurality of rollers for conveying the glass sheet along a plane; a lift jet array comprising a plurality of nozzles, one or more of the plurality of nozzles comprising a tip having a plurality of orifices; and a shaping mold located above the roll conveyor, wherein the lift jet array is positioned below the roll conveyor such that each nozzle tip is located above the centerline of the plurality of rollers. Also disclosed herein are methods for shaping a glass sheet comprising heating the glass sheet and conveying the glass sheet on a roll conveyor to a position between the lift jet array and the shaping mold, wherein gas flows from the lift jet array with a force sufficient to lift the glass sheet from the roll conveyor.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of priority under 35 U.S.C. §119 of U.S. Provisional Application Ser. No. 61 / 972,784 filed on Mar. 31, 2014 the content of which is relied upon and incorporated herein by reference in its entirety.FIELD OF THE DISCLOSURE[0002]The disclosure relates generally to methods and systems for shaping glass sheets, and more particularly to lift jet floatation systems for bending thin glasses.BACKGROUND[0003]The ability to thermally shape and form thin glass sheets is increasingly relevant to various industries, such as the automotive industry. The production of glass panes for automobiles is a complex process, which is constantly changing due to increasingly stringent environmental and safety requirements. The demand for intricate glass shapes with high optical quality and low weight is growing as governmental regulations require increased fuel economy and reduced emissions. The ability to make automotive parts ...

AI Technical Summary

Benefits of technology

The disclosure is about a system for shaping glass sheets using a roll conveyor, a lift jet array, and a shaping mold. The system is designed to heat and shape the glass sheet while it is being conveyed on the roll conveyor. The lift jet array, which is positioned above the roll conveyor, delivers a stream of gas to lifter the glass sheet from the roll conveyor. The technical effects of this system include improved surface quality, reduced bending and warping of the glass sheet, and better control over the shaping process.

Problems solved by technology

The production of glass panes for automobiles is a complex process, which is constantly changing due to increasingly stringent environmental and safety requirements.

However, when thinner glasses (e.g., thicknesses less than about 3.0 mm, between about 0.3 mm and about 2.0 mm, between about 0.5 mm and about 1.5 mm, and all ranges and subranges therebetween) are processed using these traditional lift jet systems, the glass tends to distort and bend between each nozzle due to the localized upward force from the nozzles.

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