Curved Glass Direct-Melt Compression Molding for Lower Thermal Waste
Find Innovative SolutionsGenerate Solutions
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 glass melt into a mold for compression molding, followed by controlled cooling and crystallization to form curved glass, optimizing temperature differences and using nucleation agents to enhance crystallinity and reduce devitrification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If curved glass is formed from plate glass by hot bending, then curved glass can be obtained, but resource waste and production costs increase due to high-temperature to low-temperature forming process
Solution Approach 1:
Instead of forming curved glass from plate glass through hot bending (2D to 3D transformation), the invention inverts the approach by directly molding curved glass from glass melt in a 3D mold cavity. This eliminates the unnecessary intermediate plate glass formation step and the associated high-temperature to low-temperature forming process, thereby reducing energy waste while maintaining manufacturing feasibility
Solution Approach 2:
The invention extracts and eliminates the hot bending process from the traditional manufacturing sequence. By directly introducing glass melt into a mold cavity with preset 3D shape and performing compression molding, the process removes the inefficient high-temperature to low-temperature forming step that causes resource waste, while still achieving the desired curved glass product
2Productivity
If glass liquid is cooled too fast, then cooling efficiency increases, but glass breaks due to tensile stress from cooling
Solution Approach 1:
The invention optimizes the cooling parameters by controlling the temperature difference between glass liquid and mold within 250°C to 500°C. This parameter optimization allows for controlled cooling that prevents excessive thermal shock while maintaining efficient cooling, thereby avoiding glass breakage due to tensile stress while preserving productivity
Solution Approach 2:
The invention prepares for potential cooling-related issues by pre-establishing appropriate mold temperatures and cooling rates. By controlling the temperature difference within the optimal range before the cooling process begins, the system cushions against the risk of glass breakage from thermal shock, ensuring both glass integrity and cooling efficiency
3Reliability
If glass liquid is cooled too slow, then glass breaking from thermal shock is avoided, but glass devitrification occurs and transparency is lost
Solution Approach 1:
The invention precisely controls the cooling parameters by maintaining the temperature difference between glass liquid and mold within 250°C to 500°C. This optimized parameter range enables slow enough cooling to prevent thermal shock and glass breakage, while fast enough cooling to prevent devitrification and maintain transparency, thus achieving both strength and manufacturing precision
4Ease of manufacture
If conventional hot bending process is used, then curved glass can be formed, but the process is complex and time-consuming
Solution Approach 1:
The invention inverts the traditional manufacturing sequence by directly forming 3D curved glass from glass melt in a mold cavity, rather than first producing plate glass and then bending it into curves. This inverted approach eliminates multiple process steps including hot bending, thereby simplifying the manufacturing process and reducing production cycle time while maintaining ease of manufacture
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 approach reduces resource waste and production costs by omitting high-to-low temperature forming processes, while achieving high-quality curved glass with controlled crystallization and improved mechanical properties.
Implementation Method 1
a glass melt is directly introduced into a mold, and a 3D form required for curved glass is prepared by a compression molding process, and then gradually cooled to a room temperature
Implementation Method 2
after the 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, and before the annealing the molded glass product, the method further includes: performing crystallization on the molded glass product
Implementation Method 3
the glass batch further includes a nucleation agent; and after the 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, and before the annealing the molded glass product, the method further includes: performing crystallization on the molded glass product
Implementation Method 4
a glass melt is directly introduced into a mold, and a 3D form required for curved glass is prepared by a compression molding process
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
This application relates to the technical field of electronic products, and in particular, to curved glass and a preparation method therefor, and an electronic device. A molding process from a high temperature to a low temperature can be reduced, and a preparation process can be shortened. Therefore, a resource waste caused by a high temperature to a low temperature in a related technology can be reduced, and manufacturing costs are reduced. This application provides a preparation method for curved glass, including: 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.