Glass Plate Production Method Using Article Cullet
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Solution Overview
Problem
The production of glass plates for cover glasses requires a low concentration of impurities, but the use of article cullet, which contains high levels of impurities from coatings, poses a challenge in achieving this quality.
Innovation Solution
A glass plate production method that involves adjusting the mixing ratios of glass raw materials, glass plate cullet, and article cullet, as well as treating the cullets to remove glass-outside attached substances, to control the impurity concentration in the glass plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If article cullet is used in the production of glass plates for cover glasses, then cost is reduced, but impurity concentration increases
Solution Approach 1:
The patent applies preliminary action by performing a treatment (such as sorting, cleaning, or preprocessing) on the article cullet before it is mixed with glass raw materials and glass plate cullet. This preliminary treatment removes or reduces impurities from the article cullet, ensuring that when the cullet is later used in glass plate production, the resulting glass plates meet the required low impurity concentration standards while still achieving cost reduction through article cullet utilization.
2Productivity
If article cullet with high impurity concentration is used, then productivity is improved through material recycling, but the quality of glass plates deteriorates
Solution Approach 1:
The patent applies preliminary action by performing a treatment (such as sorting, cleaning, or preprocessing) on the article cullet before it is mixed with glass raw materials and glass plate cullet. This preliminary treatment removes or reduces impurities from the article cullet, ensuring that when the cullet is later used in glass plate production, the resulting glass plates meet the required low impurity concentration standards while still achieving cost reduction through article cullet utilization.
Solution Approach 2:
The patent applies parameter changes by adjusting the mixing ratios of glass raw materials, glass plate cullet, and article cullet. By optimizing these proportions and implementing preprocessing treatments on article cullet, the patent transforms the quality parameters of the cullet materials, enabling the production of high-quality glass plates with low impurity concentrations while maintaining high productivity through effective material recycling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables the production of glass plates with a low concentration of impurities, even when using article cullet high in impurities, thereby meeting the quality requirements for cover glasses.
Implementation Method 1
glass raw materials and optionally cullet having the same glass composition as that of a desired molten glass are continuously fed into a melting furnace and melted into a molten glass by heating to about 1600 to 1700° C.
Data Source
AI summary
A glass plate (a glass plate for cover glasses) with a low concentration of impurities is produced using article cullet. A process of melting glass raw materials and cullet and producing therefrom a glass plate is repeated. The glass plate is further processed into a glass article. The glass article is a cover glass for displays, including the glass plate and a coating provided on a surface of the glass plate. The cullet used includes glass plate cullet that is cullet of the glass plate and article cullet that is cullet of the article cullet. At least one of the mixing ratio of the glass raw material, the mixing ratio of the glass plate cullet, the mixing ratio of the article cullet, the impurity concentration in the glass plate cullet and the impurity concentration in the article cullet is adjusted in accordance with at least one of the impurity concentration in the glass plate cullet and the impurity concentration in the article cullet.