Compression-Molded Curved Glass With Controlled Cooling
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Solution Overview
Problem
Current methods for producing curved glass involve high-temperature to low-temperature forming processes that are resource-intensive and costly, leading to waste and increased production costs.
Innovation Solution
A method involving direct introduction of a glass melt into a mold for compression molding, followed by controlled cooling and annealing, which omits the high-temperature to low-temperature forming process, and includes controlled temperature differences and crystallization for glass ceramics to enhance efficiency and reduce waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the curved glass is formed from plate glass by hot bending, then the curved glass can be obtained, but a resource waste occurs due to high temperature to low temperature process and production costs increase
Solution Approach 1:
The patent applies preliminary action by directly introducing glass melt into the mold cavity in the desired curved shape, rather than first forming plate glass and then bending it. This eliminates the subsequent high-temperature to low-temperature forming process, reducing resource waste and production costs while achieving the curved glass product directly
2Productivity
If the glass liquid is cooled too fast, then the molding time is reduced, but glass breaks due to tensile stress from cooling
Solution Approach 1:
The patent applies parameter changes by precisely controlling the temperature difference between glass liquid and mold (250-500°C for base glass, 500-800°C for glass ceramics) and adjusting cooling rates according to the glass type. This resolves the contradiction by finding optimal cooling parameters that maintain both productivity and glass integrity, preventing thermal stress cracking
3Reliability
If the glass liquid is cooled too slow, then glass breaking is avoided, but devitrification occurs and transparency is lost
Solution Approach 1:
The patent applies parameter changes by establishing specific temperature difference ranges (250-500°C for base glass, 500-800°C for glass ceramics) and controlling cooling rates within optimal boundaries. This prevents both thermal stress cracking (from too fast cooling) and devitrification (from too slow cooling), maintaining both glass integrity and transparency through precise parameter optimization
4Ease of manufacture
If the temperature difference between glass liquid and mold is not controlled, then the molding process is simple, but glass devitrification or breaking occurs
Solution Approach 1:
The patent applies parameter changes by defining specific temperature difference ranges (250-500°C for base glass, 500-800°C for glass ceramics) that balance process simplicity with quality control. These standardized parameter ranges enable consistent production of high-quality curved glass while maintaining manufacturing efficiency, resolving the contradiction between simplicity and precision
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 reduces resource waste and production costs while maintaining the quality and properties of curved glass, enabling efficient production of curved glass with high crystallinity and precision.
Implementation Method 1
melting a glass batch into a glass liquid
Implementation Method 2
gradually cooled to a room temperature
Implementation Method 3
annealing the molded glass product
Implementation Method 4
performing crystallization on the molded glass product
Data Source
AI summary
A curved glass and a preparation method is provided. The preparation method for curved glass includes: melting a glass batch into a glass liquid, and clearing the glass liquid; introducing the cleared glass liquid into a mold cavity with a preset shape, and forming, by using a compression molding process, a glass product with a shape corresponding to that of the curved glass, where a size of the glass product is greater than a size of the curved glass; annealing the molded glass product; and processing the annealed glass product into the curved glass based on the shape and the size of the curved glass.