Encapsulated Windshield Molding Adhesive-Free Retention
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Solution Overview
Problem
Existing windshield mounting methods, such as gasket-type and bonded glass, require additional adhesives like butyl or polyurethane for retention, which can compromise aerodynamics and installation efficiency.
Innovation Solution
An encapsulated windshield molding with an open-ended channel and primary and secondary lip seals that mechanically lock the windshield mask, eliminating the need for adhesives like butyl or polyurethane, and providing a water-tight seal through whisker-type seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If bonded glass mounting with adhesive is used, then the glass surface and body surface are in nearly the same plane, but additional adhesives like butyl or polyurethane are required which compromise aerodynamics
Solution Approach 1:
The invention extracts and eliminates the adhesive layer from the windshield mounting system. The encapsulated molding with mechanical locking features (lips, channels, and retention structures) provides retention without requiring butyl or polyurethane adhesives, thereby removing the aerodynamic compromise while maintaining surface alignment.
Solution Approach 2:
The invention replaces the chemical bonding mechanism (adhesives) with a mechanical retention system. The encapsulated molding uses mechanical features such as lips engaging with channels, snap-fit structures, and physical interlocking to retain the glass, substituting the adhesive-based bonding system with a purely mechanical retention system that improves aerodynamics.
2Reliability
If bonded glass mounting with adhesive is used, then the glass is retained in place, but installation time is increased due to adhesive application and curing
Solution Approach 1:
The encapsulated molding is pre-formed with integrated retention features (lips, channels, and mechanical locking structures) before installation. This preliminary preparation eliminates the need for on-site adhesive application and curing, allowing the glass to be retained immediately through mechanical engagement, thus reducing installation time while maintaining reliable glass retention.
Solution Approach 2:
The invention replaces the time-consuming adhesive application and curing process with an immediate mechanical retention system. The pre-formed encapsulated molding with integrated locking features provides instant glass retention upon installation, eliminating the waiting time required for adhesive curing while ensuring reliable glass retention through mechanical interlocking.
3Manufacturing precision
If encapsulated glass process with injection molding is used, then dimensional tolerances are excellent, but adhesives like butyl or polyurethane are still required for retention
Solution Approach 1:
The invention merges the encapsulated glass process with integrated retention features into a single unit. The injection-molded encapsulated molding combines the precision dimensional features with built-in mechanical retention structures (lips, channels, and locking mechanisms), eliminating the need for separate adhesive application while maintaining excellent dimensional tolerances along the perimeter of the assembly.
Solution Approach 2:
The encapsulated molding serves multiple functions simultaneously: it provides the precision dimensional features for glass alignment, the structural support for glass retention, and the aerodynamic fairing for vehicle integration. This multi-functional design eliminates the need for separate adhesive layers while maintaining manufacturing precision and glass retention.
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
Improves aerodynamics and reduces installation time by ensuring a secure, adhesive-free windshield retention with enhanced sealing capabilities, suitable for medium and heavy-duty trucks and various vehicle applications.
Implementation Method 1
an open-ended channel configured for receiving the windshield mask in a mechanically locking manner
Implementation Method 2
a windshield mask interface having primary and secondary lip seals that extend outwardly in a direction opposite the windshield
Implementation Method 3
The assembly also includes means for sealing against a vehicle fame that is butyl or adhesive independent. In some embodiments, the means for sealing includes one or more seals, such as whisker seals.
Data Source
AI summary
An encapsulated windshield molding surrounds at least a portion of the peripheral edge of the windshield and includes one or more seals, such as multiple lip or whisker-type seals. The encapsulated molding aims to provide a water-tight installation of the windshield into the windshield opening of the vehicle and allows for butyl-free or adhesive-free restraint of the windshield.