Glass Sheet Bending Process

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Glass sheet bending process.

A process for bending tempered glass. Non isothermal processing of the glass with hot and cold areas within the glass sheet enables. The process involves adhering two sheets of tempered glass in overlying relation and positioning a containment barrier such as vinyl sheets over the adhered. Bending a glass pane or bottle to a precise shape is not feasible without professional equipment.

At fraunhofer iwm glass bending processes have been developed for forming sheet glass especially with application of local heating. A process for bending a glass sheet or a pair of glass sheets to a relatively sharp angle which comprises forming an electrically conducting path on the sheet along a line about which it is desired to bend the sheet and passing an electric current through the path to heat the sheet adjacent the path to a temperature above the bending point of the glass. The invention also relates to a process for manufacturing a bent glazing comprising a glass sheet comprising a peripheral compression belt and an orifice at least partially inside the peripheral compression belt said orifice having an edge compressive stress of at least 4 mpa and preferably of at least 8 mpa comprising the preparation of the glass sheet by the process according to the invention comprising the local cooling followed by the cutting of the orifice in the locally cooled zone.