Resin Frame Buffering for Vehicle Window Glass Stress
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The connection between quarter window glass and guide rail in existing manufacturing processes is insufficient, leading to stress-induced cracking or deformation of the glass due to resin shrinkage during solidification.
Innovation Solution
A fixed window glass assembly with a resin frame featuring a harder portion in a U-character shape and a softer portion, where the harder portion is integrally molded with a buffer portion to absorb stresses and securely attach the guide portion to the glass, while the softer portion ensures sealing and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the resin frame is solidified to connect the quarter window glass and guide rail, then the connection is formed, but stresses are generated by shrinkage that may crack or deform the quarter window glass
Solution Approach 1:
The resin frame is designed with a dual-structure comprising a harder portion and a softer portion, where each region has different material properties optimized for its specific function. The harder portion provides structural strength for connection, while the softer portion absorbs shrinkage stresses, preventing glass damage.
Solution Approach 2:
The resin frame combines two types of resin materials with different hardness levels into a single integrated structure. This composite construction allows the frame to simultaneously provide strong mechanical connection and stress buffering capacity, resolving the contradiction between connection strength and stress-induced damage.
2Object-affected harmful factors
If the resin frame is made softer to buffer stresses, then stress buffering improves, but the connection strength and structural integrity may be compromised
Solution Approach 1:
Different regions of the resin frame are assigned different material hardness levels. The softer portion is strategically positioned to absorb stresses, while the harder portion maintains structural integrity and connection strength, allowing both requirements to be satisfied simultaneously.
3Reliability
If the guide portion and fixed window glass are firmly connected, then connection reliability improves, but stress transmission may cause cracking or deformation of the glass
Solution Approach 1:
The resin frame uses a composite structure with harder and softer portions to achieve both firm connection and stress isolation. The harder portion ensures reliable mechanical bonding between the guide portion and glass, while the softer portion acts as a stress buffer that prevents harmful stress transmission to the glass.
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 configuration firmly connects the guide portion to the fixed window glass, effectively buffers stresses, and minimizes the risk of cracking or deformation, ensuring the glass's surface accuracy and durability.
Implementation Method 1
the softer portion covering the harder portion... to buffer stresses to be generated between the fixed window glass and the resin frame
Data Source
AI summary
A fixed window glass assembly with a resin frame, wherein the resin frame is attached to a peripheral edge portion of a fixed window glass to be mounted to a vehicle and has a guide portion for guiding an elevating window glass, the resin frame is formed of an integrally molded product including a harder portion and a softer portion covering the harder portion, the harder portion being formed in a U-character shape in section to wrap the peripheral edge portion of the fixed window glass in a thickness direction thereof. The harder portion includes a buffer portion at a part of the peripheral edge portion of the fixed window glass to buffer stresses to be generated between the fixed window glass and the resin frame.