Glass plate with resin frame for vehicle window and method for producing glass plate with resin frame
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Solution Overview
Problem
The existing glass plates with resin frames for vehicle windows face issues such as creak sounds and deformation of decorative moldings due to heat shrinkage, leading to a deterioration in cosmetic appearance and adhesive failures between the glass surface and resin frame.
Innovation Solution
A glass plate with a resin frame and decorative molding, where a solid spacer is disposed between the resin frame and the decorative molding, allowing the resin frame to be molded as a single unit with the glass plate, and a process involving a mold where the spacer is attached to the decorative molding before injecting molten resin to minimize creak sounds and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a thermosetting adhesive is used to bond the decorative molding to the frame, then the creak sound is reduced, but the decorative molding is deformed by heat shrinkage causing sink marks
Solution Approach 1:
A resin layer is introduced as an intermediary bonding material between the decorative molding and the frame. This resin layer absorbs the heat shrinkage stress through its viscosity and flow characteristics, preventing direct stress transmission to the decorative molding while maintaining bonding. The resin acts as a buffer that mediates between the shrinking frame and the rigid decorative molding, eliminating both creak sounds and deformation.
2Shape
If an oily liquid material is used to bond the decorative molding to the frame, then heat shrinkage deformation is reduced, but adhesive failure occurs between the glass surface and resin frame
Solution Approach 1:
The bonding material's parameters are optimized by controlling the resin's viscosity and curing characteristics. The resin is formulated to have appropriate flow properties during injection to ensure complete filling and bonding between glass and frame, while maintaining sufficient viscosity to prevent adhesive failure. The curing process parameters are controlled to achieve optimal bonding strength without causing deformation.
3Productivity
If the resin frame is molded as a single unit with the decorative molding, then production efficiency is improved, but the decorative molding is deformed by bonding force during heat shrinkage
Solution Approach 1:
The resin is pre-positioned in the molding cavity before the frame and decorative molding are assembled. This preliminary placement ensures that the resin is already in position to absorb heat shrinkage stress during the molding process, preventing deformation of the decorative molding while maintaining the benefits of single-unit molding for production efficiency.
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 enhances the quality of the glass plate by reducing creak sounds, preventing adhesive failures, and maintaining the cosmetic appearance by minimizing sink marks and deformation, resulting in a more rigid and aesthetically pleasing vehicle window solution.
Implementation Method 1
the spacer being solid at room temperature
Implementation Method 2
injecting a molten resin into the cavity of the mold
Data Source
AI summary
A glass plate with a resin frame for a vehicle window, includes a glass plate; a resin frame disposed on a peripheral edge area of the glass plate; and a decorative molding disposed on the resin frame; wherein the resin frame is molded to the glass plate and the decorative molding as one unit; and wherein a spacer is disposed between the resin frame and the decorative molding, the spacer being solid at room temperature.