METHOD AND SYSTEM FOR FORMING SHAPED GLASS ARTICLES

摘要

A method of forming a shaped glass article includes placing a glass sheet on a mold such that a first glass area of the glass sheet corresponds to a first mold surface area of the mold and a second glass area of the glass sheet corresponds to a second mold surface area of the mold. The first glass area and the second glass area are heated such that the viscosity of the second glass area is 8 poise or more lower than the viscosity of the first glass area. A force is applied to the glass sheet to conform the glass sheet to the mold surface. During the heating of the second glass area, the first mold surface area is locally cooled to induce a thermal gradient on the mold.

主权项

1. A method of forming a shaped glass article, comprising:
placing a glass sheet on a mold having a mold surface with a select shaped glass article profile, the placing being such that a first glass area of the glass sheet corresponds to a first mold surface area of the mold surface and a second glass area of the glass sheet corresponds to a second mold surface area of the mold surface; heating the first glass area and the second glass area to a glass viscosity between 1010.1 poise and 109 poise; locally heating the second glass area to a glass viscosity at or below 109.9 poise such that the glass viscosity of the second glass area is 8 poise or more lower than the glass viscosity of the first glass area; applying a force to the glass sheet to conform the glass sheet to the mold surface when the second glass area is at a glass viscosity at or below 109.9 poise; and locally cooling the first mold surface area to induce a thermal gradient on the mold surface that results in the glass viscosity in the first glass area remaining above 109.9 poise during the local heating of the second glass area.