Profiled Bead Glazing with Polymeric Ribbon for Sealing
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Solution Overview
Problem
Existing vehicle glazing systems with profiled beads suffer from reduced clear view due to wide cover pieces and masking strips, and challenges in maintaining precise positioning and sealing, especially with laminated glazed elements having dispersive dimensions.
Innovation Solution
A vehicle glazing system featuring a profiled bead with a groove for clipping, incorporating a polymeric tape between the groove and the edge of the inner substrate, and an inner wing with a hole for flexibility and water evacuation, allowing precise adaptation and enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the inner wing is made wide to ensure strong adhesion and forceful clipping, then the mechanical strength and adhesion are improved, but the view through the glazed element is reduced due to the need for wider cover pieces and masking strips
Solution Approach 1:
The profiled bead is segmented into distinct functional zones: the lip (61) for positioning against the outer substrate edge, the groove (60) for clipping the cover piece, and the inner wing (65) for adhesion. This segmentation allows each element to be optimized independently, enabling the inner wing to be narrower while maintaining adhesion strength through proper geometric design and material selection.
Solution Approach 2:
The profiled bead incorporates local quality variations through its cross-sectional geometry, with the lip providing positioning stability, the groove providing mechanical interlocking for the cover piece, and the inner wing providing adhesion surface. This localized functional differentiation allows the inner wing to be optimized for adhesion without requiring excessive width, thereby preserving clear view area.
2Manufacturing precision
If the groove is positioned accurately in space relative to the glazed element edge, then the clipping precision is improved, but this becomes more difficult when the edge has small radius of curvature and when accounting for dimensional dispersion of laminated glass elements
Solution Approach 1:
The lip (61) is designed to be positioned against the edge (31) of the outer substrate (3) before the clipping operation, establishing a predetermined reference position for the groove (60). This preliminary positioning action compensates for dimensional variations in laminated glass elements and ensures consistent groove placement relative to the glazed element edge, even when the edge has small radius of curvature.
3Reliability
If the seal between the groove and the edge of the glazed element is enhanced to prevent water penetration, then the sealing performance is improved, but the device complexity increases
Solution Approach 1:
The sealing function is merged with the positioning and clipping functions in the profiled bead design. The lip (61) positioned against the outer substrate edge and the groove (60) configured for clipping the cover piece work together to create a sealed assembly that prevents water penetration without requiring separate sealing components, thereby enhancing sealing performance while avoiding increased device complexity.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention relates to glazing (1), in particular vehicle glazing, comprising a laminated glass element (2), said glazing (1) comprising a profiled bead (6) including a groove (60) for snap-fitting a covering part (7), characterised in that it also comprises a polymer ribbon (64) located between said groove (60) and an edge (51) of an inner substrate (5), or else between a peripheral edge of an inner surface (52) and an inner flange (65).