Cold-Bent Curved Glass Bonding for Distortion-Free Vehicle Interiors
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Solution Overview
Problem
Current methods for forming curved glass substrates for vehicle interiors are costly, prone to optical distortion, and surface marking, and fail to meet safety and durability requirements, particularly in thermal forming processes.
Innovation Solution
A method involving a cold-bending process using a frame with openings to apply a bonding material that adheres a glass substrate to the frame, preventing delamination and enhancing mechanical integrity, while maintaining optical properties and avoiding high-temperature processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If thermal forming is used to create curved glass substrates, then curved shapes can be achieved, but high cost, optical distortion, and surface marking occur
Solution Approach 1:
The patent changes the temperature parameter from high (thermal forming) to low (cold bending, below glass transition temperature), which eliminates optical distortion and surface marking while achieving the desired curved shape through mechanical force applied at room temperature or elevated but sub-transition temperatures
2Shape
If thermal forming is used to create curved glass substrates, then curved shapes can be achieved, but delamination and poor mechanical integrity occur
Solution Approach 1:
The patent applies preliminary action by pre-forming the curved shape at low temperature before final assembly, and using adhesive compositions with specific properties (flexibility, bond strength) to prevent delamination during subsequent handling and installation processes
Solution Approach 2:
The patent uses composite materials by combining glass substrate with flexible adhesive compositions that contain rubber particles or other flexible additives, creating a composite bonding system that maintains mechanical integrity while accommodating thermal expansion differences
3Shape
If thermal forming is used to create curved glass substrates, then curved shapes can be achieved, but high processing costs occur
Solution Approach 1:
The patent changes the temperature parameter from high (thermal forming requiring furnaces and energy-intensive processes) to low (cold bending at or near room temperature), significantly reducing energy consumption, equipment requirements, and overall manufacturing cost while achieving the same curved shape
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
The method enables cost-effective, distortion-free, and durable curved glass substrates that meet safety standards, with improved mechanical and optical properties compared to traditional thermal forming processes.
Implementation Method 1
A bonding material or adhesive material is supplied between the second major surface and the support surface to adhere the glass substrate to the frame
Data Source
AI summary
Embodiments of a vehicle interior component and methods of forming the same are disclosed. The vehicle interior component includes a frame with a support surface and having an opening formed in the support surface. A glass substrate is provided that includes a first major surface, a second major surface facing the support surface, and a minor surface between the first and second major surfaces and defining a thickness of the glass substrate. An adhesive at least partially fills the opening and adheres the glass substrate to the frame. The adhesive in the opening acts to secure the glass substrate and adhesive to the frame.