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Method of making shaped glass articles

An article, glass technology, applied in the field of manufacturing shaped glass articles, capable of solving problems such as distortion, optical distortion, low surface quality, etc.

Inactive Publication Date: 2013-10-30
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to low surface quality and overall low dimensional accuracy, glass objects produced by the above compression molding process may also exhibit one or more of cut marks, distortion, optical distortion

Method used

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  • Method of making shaped glass articles
  • Method of making shaped glass articles
  • Method of making shaped glass articles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] In various embodiments described below, shaped glass articles are produced by preferentially heating the glass sheet near the mold, as described above, and then sagging the glass sheet into the mold (as described above figure 1 , 6 and 8). In these examples, the glass sheet adopts Corning (CORNING) 2317 glass. The materials used for the molds are different and will be detailed below. For each example, vacuum sagging was used to form the glass sheet into a shaped glass article. The glass sheet is heated until the glass viscosity is less than 10 9.1 P, preferably less than 10 8.6 P, make the sagging glass fully close to the complex mold forming surface (such as the surface with spatial curvature) through vacuum. On the one hand, if vacuum is not available on the mold forming surface or is only used at the end of the process, then the glass viscosity can be between 10 8.2 P and 10 7.2 P, depending on the curvature and shape of the part to be formed. Smaller radii of...

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Abstract

In a method of making shaped glass articles, a glass sheet is placed on a mold having a shaping surface with a desired surface profile of a shaped glass article. The glass sheet is preferentially and rapidly heated by radiation while in the vicinity of the mold so that the mold remains substantially cooler than the glass sheet during the heating. The glass sheet is sagged onto the shaping surface of the mold so that at least a portion of the sagged sheet assumes the desired surface profile of the shaped glass article. After sagging and shaping, the sagged and shaped glass sheet is removed from the mold.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of provisional application 61 / 077597, filed July 2, 2008. technical field [0003] The present invention generally relates to a method of making a shaped glass article. The term "shaped glass article" as used herein refers to a glass article bounded by non-planar, open surfaces. "Open" means that the interface surfaces of the glass article do not form an enclosed space. Background technique [0004] Molding is a common technique used to manufacture shaped objects. Shaped glass articles can be made using, for example, compression molding techniques. In one embodiment, compression molding refers to shearing a gob from molten glass and pressing the frit into a desired shape in a mold. In the mold the molten glass is exposed to the outside air. When stretching the molten glass to make thin-walled glass objects with complex curvatures, the molten glass may cool, or form a cold shell,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B23/025C03B23/035C03B23/023C03B23/03
CPCC03B23/0235C03B23/0307C03B40/005C03B23/0357C03B23/0258C03B23/023C03B23/025C03B23/03C03B23/035C03B25/02C03B33/00C03C17/001C03C21/002C03C2217/78
Inventor L·乌克兰采克
Owner CORNING INC