Unitary Vehicular Window Trim Assembly Reducing Assembly Complexity
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Solution Overview
Problem
Current automotive window trim assemblies are heavy, complex, and costly to assemble, with multiple pieces requiring multiple operations, leading to increased assembly time and reduced quality of fit and finish, and they pose challenges for recycling due to the use of non-separable materials like rubber, plastic, and metal combinations.
Innovation Solution
A lightweight, unitary vehicular window trim assembly is created using integrally molded thermoplastic channel members forming a U-shaped retainer with anti-rotation ribs and retaining flanges, combined with a metallic trim member and adhesive sealants, which reduces assembly complexity and enhances recyclability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple pieces are used for window trim assembly, then structural support and sealing function are improved, but assembly complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple separate components (decorative molding, glass run channel, and seal) into a single integrally molded unitary construction. This merging eliminates the need for multiple assembly operations while maintaining the sealing function, directly resolving the contradiction between reliability and assembly complexity
2Strength
If multiple pieces are used for window trim assembly, then structural support is improved, but assembly time increases
Solution Approach 1:
The unitary construction integrates the decorative molding, glass run channel, and seal into one piece, eliminating multiple assembly steps and reducing assembly time while maintaining structural support through the integrated design
3Reliability
If multiple materials (rubber, plastic, metal) are used, then functional performance is improved, but recyclability deteriorates
Solution Approach 1:
The patent uses a single thermoplastic material with composite-like properties that integrates the functions previously requiring multiple materials. The thermoplastic provides structural support, sealing, and decorative functions in one material, making the entire assembly recyclable as a single material type
Solution Approach 2:
The invention changes the material parameter from multiple material types to a single thermoplastic material, fundamentally altering the material composition to achieve both functional performance and recyclability
4Strength
If conventional sealing systems are attached directly to weld flange, then structural support is improved, but manufacturing complexity increases
Solution Approach 1:
The integrally molded unitary construction combines the seal and structural support elements into one piece that attaches to the weld flange as a single component, eliminating the complexity of attaching separate seal and structural elements while maintaining structural support
Data Source
AI summary
A vehicular window trim assembly includes a decorative outer trim member and first and second channel members fixedly connected together at overlapping portions of the channel members to form an inverted, U-shaped retainer to receive and retain a window seal. A central portion of the retainer is formed by the overlapping portions. A first leg portion of the retainer is formed by the first channel member and a second leg portion of the retainer is formed by the second channel member. Each of the channel members is integrally molded to form a unitary construction.