Vehicle Glazing Trim Retention via Embedded Rigid Insert
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Solution Overview
Problem
Existing methods for attaching trims to vehicle glazings, such as bonding or clipping, often fail to provide sufficient pull-off force to keep the trim securely in place, especially under conditions like wind, rain, and temperature variations.
Innovation Solution
A vehicle glazing with a glazing profile that includes a rigid insert embedded within, where the trim engages with the insert through apertures and projections, providing enhanced retention and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If trim is bonded or clipped to the edge of a glazing, then the trim can be attached to the glazing, but the pull-off force is insufficient to keep the trim securely in place under environmental conditions
Solution Approach 1:
The invention uses a composite structure combining a resilient polymer glazing profile with a rigid insert embedded within it. This composite construction provides both the sealing flexibility of the polymer and the structural strength of the rigid insert, enabling the trim mounting system to achieve sufficient pull-off force and reliable retention under environmental conditions like wind, rain, and temperature variations.
Solution Approach 2:
The trim retention system is divided into separate functional components: the resilient polymer glazing profile for sealing and flexibility, and a separate rigid insert for structural strength and trim retention. This segmentation allows each component to perform its specific function optimally, with the rigid insert providing the necessary mechanical strength for secure trim attachment.
2Strength
If a rigid insert is embedded in the glazing profile, then the retention force and stiffness are increased, but the manufacturing process becomes more complex
Solution Approach 1:
The invention merges the glazing profile manufacturing with the insert embedding process by incorporating the insert into the injection moulding cycle. The insert is placed in the mould cavity before injection, and the polymer material is injected around it in the same manufacturing step, creating an integrated assembly without requiring separate operations for insert installation.
Solution Approach 2:
The rigid insert is prepared and positioned in the mould cavity before the polymer injection process begins. This preliminary placement ensures the insert is correctly positioned and secured before the polymer material is injected around it, simplifying the overall manufacturing process and ensuring consistent insert positioning in the final product.
3Productivity
If the insert is moulded in situ on the pane, then manufacturing efficiency is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The injection moulding process itself provides the positioning and securing functions for the rigid insert. The insert is designed with features that allow it to be automatically positioned and secured by the mould cavity and injected polymer material, eliminating the need for separate positioning operations and reducing manual intervention requirements.
Data Source
AI summary
A vehicle glazing has a glazing profile provided around at least a portion of the periphery of a pane of glazing material. A rigid insert is embedded in the glazing profile, and a trim is mounted on the glazing profile, the trim engaging the insert and being retained by it. The insert is provided with at least one aperture through which the insert is engaged by at least one protrusion on the trim.