Back to results
US 8,516,854 B2Granted
Progressive pressing to form a glass article
AssigneeCorning Incorporated
InventorMatthew John Dejneka
Life of this patent
Estimating the term…
Abstract
The invention is directed to a method of forming small, thin glass articles having a thickness of less than 5 mm by the use of a plunger and a die, the die having walls, a terminal area and a transition area in contact with both the walls and the transition area is such that the interior distance dimensions of the die gradually decrease as one progresses from the terminal area through the transition area to the walls.
Claims11
A method for forming, thin glass articles, said method comprising the steps of:
- providing a mold consisting of a die having a cavity and a plunger capable of fitting within the cavity of said die, said die being a bottomless die having side walls between 70° and the perpendicular to the bottomless area of the die, a plurality of terminal walls, and a shaped transition area within said die extending outwardly from said side walls to said terminal area, said transition area being continuous about the interior of the die cavity from the terminal walls to the side walls;
- providing a glass sheet having a length, width and thickness dimensions such that the glass fits within the mold at the junction of the terminal walls and the transition area, wherein the die initially only contacts the glass sheet substantially at the edges;
- heating the glass to a viscosity in the range of 107-1013 poise;
- lowering the plunger to contact the glass;
- applying increasing pressure to the glass;
- pressing the glass until the edges of the glass are sufficiently bent and a shaped glass article is formed and the glass article is pressed through the die and deposited on a receiving surface.
3 more elements
Dependencies are inferred from the claim text.