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US 12,637,382 B2Granted
Glass parts and gob-pressing methods for making such
AssigneeCorning Incorporated
InventorsRichard Dominic Bomba, Cyril Rémy André Dedieu, Arnaud Dominique Dejean, Allan Mark Fredholm, Anne-Claire Jeanson, David John McEnroe, Mathieu Mondésir, Galan Gregory Moore, Aniello Mario Palumbo, David Sampaio, Thomas Matthew Sonner, Joseph William Soper
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Abstract
The present disclosure is directed to methods and techniques for gob-pressing a glass part of challenging geometries, such as large surfaces with thin thickness as well as features positioned far from a centroid of the part.
Claims19
A method of making a glass part, comprising:
- gob-pressing a gob of molten glass to form the glass part,
- wherein the gob-pressing comprises pressing the molten glass into a mold such that the gob spreads outward in the mold to form the molten glass to a shape of the glass part,
- wherein the shape comprises first and second major surfaces facing away from one another and a thickness orthogonal to the first and second major surfaces and extending therebetween, and wherein the shape has a length and a width aligned with the first and second major surfaces and orthogonal to one another;
- wherein the length of the shape is greater than the width;
- wherein the first and second major surfaces each have an area of at least 4 cm2;
- wherein the thickness for at least a portion of the shape between the major surfaces is less than 2 mm;
- wherein a cross-sectional portion of the shape between the first and second major surfaces extending along a 2 cm linear path varies in thickness less than 100 μm;
- wherein the shape comprises curvature of at least a portion of surfaces thereof that comprises a radius of curvature of less than 1 m;
- wherein the glass of the glass part is an aluminosilicate, comprising in molar percentage on an oxide basis at least 40 mol % silica and no more than 80 mol % silica, and at least 2 mol % alumina and no more than 30 mol % alumina;
- wherein the glass of the part has a high modulus of elasticity such that the modulus is over 80 GPa,
- wherein the glass has a dielectric constant Dk at 10 GHz less than or equal to 6.8;
- and
- wherein the glass is configured for chemical strengthening, comprising at least 5 mol % alkali metal oxides and no more than 25 mol % of the alkali metal oxides;
- and
- coating the glass part,
- wherein the coating has a modulus of elasticity within 50 GPa of the modulus of elasticity of the glass of the part.
13 more elements
A method of making a glass part, comprising:
- gob-pressing a gob of molten glass to form the glass part,
- wherein the gob of molten glass has a viscosity of less than 1200 poise,
- wherein the viscosity is at least 10 poise;
- wherein the gob-pressing comprises pressing the molten glass into a mold such that the gob spreads outward in the mold to form the molten glass to a shape of the glass part,
- wherein the shape comprises first and second major surfaces facing away from one another and a thickness orthogonal to the first and second major surfaces and extending therebetween, and wherein the shape has a length and a width aligned with the major surfaces and orthogonal to one another;
- wherein the first and second major surfaces each have an area of at least 4 cm2;
- wherein the thickness is less than 2 mm for at least a portion of the shape between the major surfaces;
- wherein a cross-sectional portion of the shape between the first and second surfaces extending along 2 cm linear path varies in thickness less than 100 μm;
- wherein the glass of the glass part is a silicate;
- wherein the glass has an average total transmission of greater than 40% between wavelengths of 450 nm and 650 nm through the thickness;
- wherein the glass has a modulus of elasticity of at least 100 GPa;
- and
- wherein the thickness is a first thickness and wherein the shape comprises a second thickness that is at least twice the first thickness.
10 more elements
Dependencies are inferred from the claim text.